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Effect of phase-shift angle on 12-pulse star connection transformer system 认领 引用 被引量：1
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作者 HUANG Pingqi CHEN Xiaoqiang +1 位作者 WANG Jiarong FU Juxia 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2022年第2期192-197,共6页
Based on the study of the harmonic suppression on DC side of the multi-pulse rectification system,a software platform is established in Matlab environment.The phase-shift angle is studied from the aspects of system st... Based on the study of the harmonic suppression on DC side of the multi-pulse rectification system,a software platform is established in Matlab environment.The phase-shift angle is studied from the aspects of system stability and economy,analyzing the effects of phase-shift angle on the input-side line current,the output-side voltage ripple,the equivalent capacity of autotransformer and other auxiliary devices in 12-pulse rectifier system.The software platform can complete the analysis only by inputting the initial conditions,eliminating the derivation of the intermediate formula and reducing the complexity of the system analysis,and have good scalability.The simulation results show that the system can effectively analyze the influence of phase angle on 12-pulse star-connected transformer. 展开更多
关键词 phase-shift angle autotransformer 12-pulse rectification system Matlab analysis
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The auxin response factor OsARF12 modulates rice leaf angle via affecting shoot gravitropism 认领 引用 被引量：2
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作者 Fengjun Xian Shuya Liu +7 位作者 Bin Xie Jishuai Huang Qiannan Zhang Yimeng Xu Xinrong Zhang Chen Lv Lin Zhu Jun Hu 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2026年第2期234-245,共12页
Leaf angle is a pivotal agronomic trait that significantly influences crop architecture and yield.Plant hormones,such as auxin,play a critical role in regulating leaf angle;however,the underlying molecular mechanisms ... Leaf angle is a pivotal agronomic trait that significantly influences crop architecture and yield.Plant hormones,such as auxin,play a critical role in regulating leaf angle;however,the underlying molecular mechanisms remain to be fully elucidated.Here,we reveal that the auxin response factor gene,OsARF12,which is highly expressed in the leaf lamina joint,negatively regulates rice(Oryza sativa L.)leaf angle via affecting shoot gravitropism.Overexpression lines of OsARF12 exhibit more erect leaf angles,while the osarf12 mutants display enlarged leaf angles compared to the wild type.Further studies demonstrate that OsARF12 directly activates the expression of Loose Plant Architecture1(LPA1)and LAZY1 by binding to their promoters.The osarf12 mutant presents impaired shoot gravitropism,a phenotype consistent with that of the lpa1 and lazy1 mutants.Collectively,we elucidate the biological functions of OsARF12,which modulates leaf angle through its impact on shoot gravitropism by regulating the expression levels of LPA1 and LAZY1.This study provides insight into the role of auxin in determining rice leaf angle,potentially holding profound effects for the optimization of crop architecture. 展开更多
关键词 Rice Plant architecture Leaf angle Shoot gravitropism OsARF12
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Three-dimensional cooperative guidance law with practical predefined-time approach angle and time-to-go convergence 认领 引用 被引量：1
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作者 Zihao WU Wei FENG +3 位作者 Xiaofeng ZHANG Wenxing FU Zhang REN Tuo HAN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第5期530-546,共17页
This paper presents a Three-Dimensional(3D)cooperative guidance law with Practical Predefined-Time(PPT)convergence for multiple missiles considering approach angle(terminal lineof-sight)and simultaneous arrival constr... This paper presents a Three-Dimensional(3D)cooperative guidance law with Practical Predefined-Time(PPT)convergence for multiple missiles considering approach angle(terminal lineof-sight)and simultaneous arrival constraints.To achieve a salvo attack against a maneuvering target from various directions,the guidance problem is tackled by addressing two critical factors:ensuring that the time-of-arrival is consistent and that the desired approach angles can be met.Considering the short duration of the homing guidance process,the convergence with predefined time for guidance states(especially the approach angle and time-to-go)is factored in.First,for the simultaneous arrival,a PPT guidance law is developed,which can meet the same time-to-go convergence rate in the Line-of-Sight(LOS)direction.Then,in the normal LOS direction,a 3D PPT guidance law is presented considering the approach angle constraint so that the desired approach angles can be reached within a user-designed time.The time-based generator technique is employed in the proposed PPT Cooperative Guidance Law(PPTCGL)to avoid the time-varying gain singularity issue.Notably,this technique can allow the convergence time to be preset in advance,independent of initial system conditions and tuning parameters.Additionally,to avoid excessive gain and improve the robustness of guidance law,a PPT disturbance observer is designed against uncertainties and target maneuvers so that the guidance system perturbation can be compensated in real time.It is userfriendly that the convergence of disturbance estimation can be met with a flexible pre-setting time before achieving the terminal guidance constraints.Finally,extensive numerical simulations are conducted to verify the effectiveness and robustness of the proposed PPTCGL in both the nominal cases and the Monte Carlo test. 展开更多
关键词 Approach angle constraint Cooperative guidance law Maneuvering target Practical predefined-time consensus Three-dimensional guidance model
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A SABRE family protein DITA1 regulates plant height and tiller angle in rice 认领 引用
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作者 Ting Zou Jing Liang +14 位作者 Shiyue Xing Yun Chen Menglian Feng Liuhui Lu Jingzhi Zhu Linjuan Xiao Nan Ma Siyu Fan Qiao Li Yueyang Liang Jinghua Jin Shiquan Wang Qiming Deng Ping Li Shuangcheng Li 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2026年第6期1112-1124,共13页
Rice plant architecture is shaped by complex agronomic traits,such as plant height and tiller angle,which collectively determine yield potential.Although SABRE family proteins are conserved across eukaryotes,their rol... Rice plant architecture is shaped by complex agronomic traits,such as plant height and tiller angle,which collectively determine yield potential.Although SABRE family proteins are conserved across eukaryotes,their roles in regulating plant architecture remain poorly understood.Here,we characterize the rice dwarf and increased tiller angle1(dita1)mutant,which exhibits reduced plant height and spreading tillers due to abnormal cell morphology.Physiological analyses reveal that the dita1 mutant displays attenuated gravitropic responses,disrupted cytoskeletal organization,and impaired amyloplast sedimentation.DITA1 encodes a rice SABRE family member that likely localizes to the endoplasmic reticulum.Expression profiling shows that DITA1 is upregulated following gravistimulation and enriched at the tiller base during the tillering stage.Mutation in DITA1 alters the transcript levels of genes involved in auxin biosynthesis and asymmetric distribution.Furthermore,analysis of natural variation within the DITA1 coding region identifies associations between haplotypes and tiller angles.Collectively,our findings suggest that DITA1 contributes to the regulation of plant architecture through potentially influencing cytoskeletal dynamics,statolith-mediated gravitropism,and asymmetric auxin distribution,providing a genetic target for optimizing plant architecture in breeding programs. 展开更多
关键词 Rice Plant height Tiller angle Gravitropism SABRE DITA1
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Beyond dwarfism:Green Revolution gene Rht-D1b orchestrates tiller angle and canopy architecture in wheat 认领 引用
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作者 Han Zhang Bo Lyu +11 位作者 Ping Zhao Yuqi Song Jiajia Cao Zihao Wang Yuhao Liu Songtao Gui Ronghui Zou Xinyou Cao Yonghong Wang Ran Meng Jie Liu Wenguang Wang 《The Crop Journal》 SCIE CSCD 2026年第2期303-312,共10页
The Green Revolution genes Rht-B1b and Rht-D1b encode truncated DELLA proteins that confer gibberellin(GA)-insensitive semi-dwarfism in wheat.Their roles in reducing plant height and enhancing lodging resistance are w... The Green Revolution genes Rht-B1b and Rht-D1b encode truncated DELLA proteins that confer gibberellin(GA)-insensitive semi-dwarfism in wheat.Their roles in reducing plant height and enhancing lodging resistance are well established,but their pleiotropic effects on specific components of plant architecture require further genetic dissection.Here,we reveal a previously unrecognized role of Rht-D1b in regulating tiller angle,a key determinant of canopy architecture.Quantitative trait locus(QTL)mapping identified Rht-D1b as a major locus controlling tiller angle.Functional validation showed that Rht-D1b not only reduces plant height but also increases tiller angle and tiller number,thereby optimizing canopy structure for enhanced yield potential.Transcriptome profiling indicated that Rht-D1b modulates the expression of genes involved in auxin signaling and polar auxin transport.Broad-scale phenotyping across diverse wheat accessions demonstrated that both Rht-B1b and Rht-D1b significantly increase tiller angle and leaf area index,with double mutants exhibiting the strongest effects on tiller architecture.Notably,the frequency of Rht-B1b and Rht-D1b has risen in modern cultivars,coinciding with a historical trend toward wider tiller angle.Together,these findings establish a novel pleiotropic role for the Green Revolution genes,demonstrating that they not only reduce plant height but also coordinate tiller angle and tiller number to optimize canopy architecture,ultimately elevating yield in wheat. 展开更多
关键词 Wheat Rht-D1b Tiller angle Shoot gravitropism Plant height
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Electronic structure and superconducting gap of HgBa2Ca2Cu3O8+δrevealed by laserbased angle-resolved photoemission spectroscopy 认领 引用
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作者 Taimin Miao Wenshan Hong +18 位作者 Qinghong Wang Shanshan Zhang Bo Liang Wenpei Zhu Neng Cai Mingkai Xu Shenjin Zhang Fengfeng Zhang Feng Yang Zhimin Wang Qinjun Peng Zuyan Xu Hanqing Mao Zhihai Zhu Xintong Li Guodong Liu Lin Zhao Yuan Li X.J.Zhou 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第2期257-263,共7页
The spatially-resolved laser-based high resolution angle resolved photoemission spectroscopy(ARPES)measurements have been performed on the optimally-doped HgBa2Ca2Cu3O8+δ(Hg1223)superconductor with a T_(c... The spatially-resolved laser-based high resolution angle resolved photoemission spectroscopy(ARPES)measurements have been performed on the optimally-doped HgBa2Ca2Cu3O8+δ(Hg1223)superconductor with a Tc of 133 K.Two distinct regions are identified on the cleaved surface:the single Fermi surface region where only one Fermi surface is observed,and the double Fermi surface region where two Fermi surface sheets are resolved coming from both the inner(IP)and outer(OP)CuO2 planes.The electronic structure and superconducting gap are measured on both of these two regions.In both cases,the observed electronic states are mainly concentrated near the nodal region.The momentum dependence of the superconducting gap deviates from the standard d-wave form.These results indicate that the surface electronic structure of Hg1223 behaves more like that of underdoped cuprates. 展开更多
关键词 cuprate angle resolved photoemission spectroscopy(ARPES)
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Metagenomic analysis of ocular microbiome in aqueous humor from myopia,cataract,primary open angle glaucoma and Posner-Schlossman syndrome 认领 引用
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作者 Wei-Jia Zhang Zhen Yang +9 位作者 Jian-Qi She Hong-Ling Wu Zi-Yao Xia Di Zhang Ling-Ge Suo Zhe Pan Yu Zhang Huai-Zhou Wang Jing Hong Chun Zhang 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2026年第7期1235-1248,共14页
AIM:To characterize the composition and functional features of the aqueous humor microbiome in common ocular diseases,including myopia,cataract,primary open angle glaucoma(POAG),and Posner-Schlossman syndrome(PSS).●M... AIM:To characterize the composition and functional features of the aqueous humor microbiome in common ocular diseases,including myopia,cataract,primary open angle glaucoma(POAG),and Posner-Schlossman syndrome(PSS).●METHODS:We performed metagenomic sequencing on 176 aqueous humor samples from patients with cataract(n=37),POAG(n=66),PSS(n=35),and myopia patients(n=38,as controls).Taxonomic profiling,functional annotation,and diversity analyses were conducted to characterize microbial communities,with adjustments for age and gender where appropriate.Associations between microbial features and clinical parameters were evaluated using correlation analyses.●RESULTS:We identified 6635 bacterial,141 archaeal,96 eukaryotic,and 108 viral operational taxonomic units(OTUs)in the aqueous humor.The microbiome was dominated by Actinomycetota and Pseudomonadota at the phylum level.Compared to myopia controls,POAG and PSS patients showed significantly reduced alpha diversity after age adjustment(P<0.05),whereas cataract patients showed no significant difference.Additionally,we identified disease-specific microbial signatures including enrichment of Cytomegalovirus(CMV)in PSS.Functional analysis revealed enrichment of distinct metabolic pathways.Finally,correlations were observed between microbiota/pathway abundance and clinical phenotype,though none remained significant after multiple testing correction.●CONCLUSION:This study provides a preliminary characterization of the aqueous humor microbiome in patients with POAG,PSS,cataract,and myopia controls.The identified microbial signatures and functional pathways offer new insights into potential microbiome-mediated mechanisms in ocular pathophysiology and may inform future diagnostic and therapeutic strategies. 展开更多
关键词 microbiome aqueous humor primary open angle glaucoma Posner-Schlossman syndrome cataract
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Experimental and numerical investigation of incident angle effects on the dynamic response of RC beams under near-field blast loading 认领 引用
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作者 Zhijie Zhang Qiushi Yan +4 位作者 Weihao Liang Chenxu Lyu Naixin Zuo Minghui Hong Dongdong Zhao 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第3期166-182,共17页
Reinforced concrete(RC)beams face potential near-field blast threats as key structural components in building structures.To investigate the failure modes and dynamic responses of RC beams subjected to near-field blast... Reinforced concrete(RC)beams face potential near-field blast threats as key structural components in building structures.To investigate the failure modes and dynamic responses of RC beams subjected to near-field blast loading,this paper presents both blast tests and numerical simulation studies on RC beams.First,near-field blast tests were conducted on five RC beam specimens under strong and weak-axis bending loading.Then,a refined finite element model of RC beams was established to verify the applicability of the adopted finite element analysis method.Finally,based on the calibrated finite element model,the failure mechanisms of RC beams were explored,and the influence of blast incidence angle on the failure modes and dynamic responses of RC beams was investigated.The results indicate:(i)Near-field blast loading demonstrates pronounced non-uniform distribution patterns.Under strong-axis incidence,clearing effects beyond the mid-span region are more significant than weak-axis incidence,leading to accelerated impulse attenuation.(ii)Three consecutive developmental stages primarily control the damage mechanism of RC beams:stress wave-induced local damage,local deformation causing plastic hinge propagation,and free vibration of the beam;(iii)As the scaled distance decreases,the failure mode of RC beams under weak-axis blast loading evolves from flexural failure to local failure.The resistance mechanism of RC beams under weak-axis blast loading is more prone to transition from compressive membrane action to tensile membrane action,reducing their blast resistance capacity;(iv)As the explosion incident angleθincreases from 0°to 90°,the blast wave-structure interaction transitions from regular reflection to Mach reflection and back to normal reflection,causing the dynamic response of RC beams to first decrease then increase,with corner concrete spalling damage being the primary failure mode. 展开更多
关键词 Rc beam Blast tests Near-field blast Incident angle Damage mechanism
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Approach angle constrained and varying speed cooperative guidance against maneuvering targets 认领 引用
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作者 Xiangjun Ding Jianan Wang +1 位作者 Junhui Liu Jiayuan Shan 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第3期56-70,共15页
This paper addresses the three-dimensional(3-D)approach angle constrained cooperative guidance problem for speed-varying missiles against maneuvering targets.First,the guidance problem is formulated in a relative refe... This paper addresses the three-dimensional(3-D)approach angle constrained cooperative guidance problem for speed-varying missiles against maneuvering targets.First,the guidance problem is formulated in a relative reference frame and a virtual control input is selected.Then,the cooperative guidance law is designed on the basis of a prediction-correction framework.The time-to-go under the baseline command is estimated by an efficient prediction method with a realistic aerodynamic model and a biased command is developed by utilizing the time-to-go predictions for synchronizing different missiles'impact times.The design of the biased command is decoupled into the individual design of its direction and magnitude.It is proved that the designed cooperative guidance law can make the time-to-go consensus error converge to zero before interception.Finally,the designed guidance law is validated through a series of numerical simulations. 展开更多
关键词 Cooperative guidance Maneuvering target Time-varying speed Approach angle constraint
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Co-effects of bedding angle and moisture condition on generalized mode Ⅲ fracture behavior of sandstone: Insights from acoustic emission localization and 3D scanning reconstruction 认领 引用
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作者 Xiaofeng Qin Haijian Su +3 位作者 Guofei Chen Liyuan Yu Junyu Chen Xiaohui Lu 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第6期4299-4317,共19页
The generalized mode Ⅲ fracture mechanism of edge-notched disc bend sandstone specimens exhibiting anisotropy—characterized by bedding planes at various angles—under different moisture conditions(dried,natural,and ... The generalized mode Ⅲ fracture mechanism of edge-notched disc bend sandstone specimens exhibiting anisotropy—characterized by bedding planes at various angles—under different moisture conditions(dried,natural,and saturated)was analyzed using acoustic emission localization and three-dimensional scanning reconstruction techniques.The results indicate that the peak load,stress intensity factor,and energy dissipation of the specimens are significantly influenced by both bedding angle and moisture condition.With increasing bedding angle,the peak load,stress intensity factor,and fracture energy exhibit an overall decreasing trend—first decreasing and then slightly increasing.As the bedding angle increases from 0°to 60°,the peak load,initial fracture stress intensity factor,peak load stress intensity factor,and peak load fracture energy of the rock specimens under the natural condition decrease by 22.8%,23.5%,19.5%,and 36.7%,respectively.The presence of water within the rock weakens the peak load and stress intensity factors,and reduces the energy required for fracture.Additionally,water weakens the influence of bedding to some extent.In terms of crack network morphology,cracks tend to propagate preferentially along the bedding planes.Specimens with higher moisture content exhibit larger crack initiation angles and higher fractal dimensions. 展开更多
关键词 Generalized modeⅢfracture Bedding angle Moisture condition Acoustic emission localization Three-dimensional scanning
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Association between choroidal thickness and primary open angle glaucoma in highly myopic eyes 认领 引用
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作者 Pei-Yao Jin Min Tang +6 位作者 Min-Wen Zhou Ying Fan Yu-Ye Ling Jian-Feng Zhu Hai-Dong Zou Jiang-Nan He Wen-Wen Xue 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2026年第6期1088-1095,共8页
AIM:To investigate the relationship between choroidal thickness(CT)and primary open angle glaucoma(POAG)in highly myopic eyes across different categories of myopic atrophic maculopathy(MAM).METHODS:This observational ... AIM:To investigate the relationship between choroidal thickness(CT)and primary open angle glaucoma(POAG)in highly myopic eyes across different categories of myopic atrophic maculopathy(MAM).METHODS:This observational analytical case–control study enrolled highly myopic patients.All participants underwent comprehensive ophthalmic examinations.CT was measured in peripapillary and macular regions using optical coherence tomography(OCT).Each eye was classified for POAG status and MAM category.Stepwise logistic regression was performed to identify factors independently associated with POAG.RESULTS:Among 248 highly myopic subjects,37(18 males,mean age 68.25±7.16y)had POAG(25 bilateral,12 unilateral)and 211(97 males,mean age 67.09±7.63y)were non-glaucomatous.Age and sex did not differ significantly between groups(both P>0.05).Seventy-eight patients had unilateral high myopia and 170 bilateral,yielding 418 highly myopic eyes,of which 58(13.88%)had POAG.POAG prevalence across MAM categories(no lesion to complete macular atrophy)was 7.14%,16.28%,14.07%,17.86%,and 17.14%,respectively(P=0.44).In the diffuse chorioretinal atrophy subgroup,POAG eyes showed significantly thicker CT in central,inner nasal,outer superior,inner superior,and inner inferior macular regions,and thinner central corneal thickness(all P<0.05).Stepwise logistic regression showed that only parafoveal inferior CT was independently associated with POAG in this subgroup(OR=1.017;95%CI:1.005–1.028;P<0.01).No significant CT–POAG association was found in other MAM categories.CONCLUSION:Increased macular CT is independently associated with POAG in highly myopic eyes with diffuse chorioretinal atrophy.This implies distinct pathogenic mechanisms underlying POAG development across different MAM categories in high myopia. 展开更多
关键词 glaucoma primary open angle glaucoma choroidal thickness high myopia myopic atrophic maculopathy
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A numerical study on polarization-dependent X-band marine radar backscatter at low grazing angles 认领 引用
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作者 Zhongbiao Chen Runxia Sun +1 位作者 Yijun He Xue Feng 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2026年第3期162-173,共12页
Although X-band marine radar has been used to observe sea surface wave parameters,the underlying scattering mechanisms at low grazing angles remain incompletely understood,which limits its practical applicability.To s... Although X-band marine radar has been used to observe sea surface wave parameters,the underlying scattering mechanisms at low grazing angles remain incompletely understood,which limits its practical applicability.To study the mechanisms,a range-resolved numerical approach that integrates hydrodynamic wave simulation with electromagnetic scattering calculations is developed.First,two numerical wave tanks are implemented using Open FOAM:tankⅠsimulates first-order Stokes waves with varying steepness,while tankⅡmodels incipient wave breaking over a sloping seabed.Second,the Method of Moments is employed to compute the radar backscatter from each point on the simulated wave surfaces.The simulated radar backscatter agrees well with the gray-value variations observed by X-band marine radars in a field experiment.Specifically,HH-polarized returns exhibit two comparable peaks near each wave crest,whereas VV-polarized returns show a dominant peak accompanied by a smaller secondary peak;the wavenumber spectrum of VV polarization matches the true wave spectrum,while that of HH polarization displays a broader energy distribution with stronger high-frequency components.As the radius of curvature of the wave crest decreases,the splitting in the gray-value profile becomes more pronounced,underscoring the role of crest geometry in polarizationdependent backscatter mechanisms at low grazing angles.This understanding may help improve methods for retrieving wave parameters from X-band marine radar images. 展开更多
关键词 X-band marine radar sea surface wave low grazing angles scattering mechanism
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Effect of initial fracture angle on the failure pattern and gas flow channel of sandstone under multistage loading 认领 引用
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作者 Quanle Zou Feixiang Lv +4 位作者 Zihan Chen Qingsong Li Jianjun Zhao Qican Ran Qingmiao Li 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第3期2142-2157,共16页
After coal seam mining,the overlying rock strata above the goaf are subjected to long-term stress and eventually undergo failure.Under mining-induced disturbances,the strata develop fractures at various angles,which s... After coal seam mining,the overlying rock strata above the goaf are subjected to long-term stress and eventually undergo failure.Under mining-induced disturbances,the strata develop fractures at various angles,which significantly influence failure modes and the morphology of gas flow channels.This study employed multistage loading experiments,numerical simulations,three-dimensional reconstruction,and image recognition to investigate the fragmentation process of rocks with different initial fracture angles under multistage loading.The results show that variations in the initial fracture angle affect the transmission of contact forces among rock particles.As the angle increases,the transmission pattern shifts from a uniform distribution to one extending along the direction of the fracture.Rocks with small initial fracture angles tend to experience tensile-dominated failure,with most of the material subjected to longitudinal loading,resulting in reduced strength.Fractures propagate from the central region of the initial fracture,producing a complex internal fracture network.The proportion of fracture channels varies considerably across regions,creating multiple zones of velocity variation in the gas flow.In contrast,rocks with large initial fracture angles are more susceptible to shear failure,with the primary load-bearing zones aligned along the inclined fracture direction.As a result,the influence on surrounding regions is limited,improving the rock's load-bearing capacity under multistage loading.In these cases,the distribution and proportion of fracture channels become more uniform,promoting more stable gas flow within the channels.Overall,these findings provide theoretical insights into how initial fracture angles govern rock failure patterns and gas flow characteristics. 展开更多
关键词 Multistage loading Initial fracture angle Failure pattern Gas flow characteristics Three-dimensional fracture reconstruction
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Effect of net radiation on soil temperature field considering slope angle 认领 引用
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作者 Zhao-Jun Zeng Chao-Sheng Tang +3 位作者 Qing Cheng Zhan-Ming Yang She-Feng Hao Bin Shi 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第4期3038-3055,共18页
Determining net radiation is crucial for understanding soil–atmosphere interactions and plays a key role in defining thermal boundary conditions for thermo-hydro-mechanical models of slopes.Current methods for estima... Determining net radiation is crucial for understanding soil–atmosphere interactions and plays a key role in defining thermal boundary conditions for thermo-hydro-mechanical models of slopes.Current methods for estimating net radiation at soil surfaces typically overlook the influence of slope angle.For this purpose,this study aims to propose two refined methods for calculating net radiation on slope surfaces,which were developed from two widely acknowledged mathematical methods for horizontal surfaces.To evaluate the refined methods,we focused on net radiations that were calculated from monitored meteorological data.The calculated net radiation was then input into a coupled hydro-thermal model to compute the slope temperature distributions,which were subsequently compared to the measured temperatures.Satisfactory agreement was observed,demonstrating the feasibility of both methods.Afterwards,we examined the influence of slope angle on solar and net radiation results,then used a coupled hydro-thermal model to quantify differences in numerical temperature results when slope angle is either considered or neglected.Results indicate that the solar radiation received on slope surface is additionally affected by slope angle.In our simulation scenarios,the slope angle causes a maximum net radiation difference of 347.83 W/m²,and a maximum temperature difference of 6.5℃. 展开更多
关键词 Slope solar radiation Slope net radiation Slope temperature Slope angle Numerical simulation
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Effect of Spudcan Penetration Angles on Adjacent Bucket Foundation in Sand 认领 引用
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作者 Conghuan Le Zhenqi He +2 位作者 Hao Hu Puyang Zhang Hongyan Ding 《哈尔滨工程大学学报（英文版）》 CSCD 2026年第1期95-109,共15页
Installing internal bulkheads in a composite bucket foundation alters the rotational symmetry characteristic of a single-compartment bucket foundation,consequently influencing the stress distribution within the bucket... Installing internal bulkheads in a composite bucket foundation alters the rotational symmetry characteristic of a single-compartment bucket foundation,consequently influencing the stress distribution within the bucket and surrounding soil.During the seabed penetration of a spudcan from a jack-up wind turbine installation vessel,an angle may form between the spudcan’s axis and the axis of symmetry of the adjacent composite bucket foundation in the horizontal plane.Such a misalignment may affect load distribution and the non-uniform interaction between the foundation,soil,and spudcan,ultimately influencing the foundation’s stability.This study employs physical model tests to ascertain the trends in end resistance during spudcan penetration in sand,the extent of soil disturbance,and the backflow condition.The finite element coupled Eulerian-Lagrangian method is validated and utilized to determine the range of penetration angles that induce alterations in the maximum vertical displacement and tilt rate of the composite bucket foundation in sand.The differential contact stress distribution at the base of the bucket is analyzed,with qualitative criteria for sand backflow provided.Findings demonstrate that the maximum vertical displacement and tilt rate of the composite bucket foundation display a“wave-like”variation with the increasing spudcan penetration angle,peaking when the angle between the spudcan and bulkhead is the smallest.Stress distribution is predominantly concentrated at the base and apex of the bucket,becoming increasingly uneven as the penetration angle deviates from the foundation’s symmetry axis.The maximum stress gradually shifts to the junction of the bulkhead and bucket bottom on the side with the shortest net distance from the spudcan.Considering the in-place stability and stress state of the composite bucket foundation is therefore imperative,and particular attention should be paid to the foundation’s state when the angle between the spudcan and bulkhead is small. 展开更多
关键词 Spudcan penetration Soil disturbance Penetration angle Composite bucket foundation Coupled Eulerian-Lagrangian
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Numerical simulation of wind sand flow fields and deposition-erosion characteristics in the bridge-road transition section under different wind angles 认领 引用
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作者 ZHANG Xingxin ZHANG Kai +2 位作者 LIU Benli ZHAO Yanhua WANG Zhenghui 《Journal of Mountain Science》 SCIE CSCD 2026年第5期2427-2439,共13页
Railways in desert suffer from windblown sand hazards,in which the problems at bridge-road transitions are usually more serious.However,the evolution of wind-sand flow fields and the associated deposition-erosion patt... Railways in desert suffer from windblown sand hazards,in which the problems at bridge-road transitions are usually more serious.However,the evolution of wind-sand flow fields and the associated deposition-erosion patterns around bridge-road transitions under different wind directions remain limited.In this study,numerical simulations are employed to study the influence of wind angle on the flow field structure,wind profiles,horizontal wind speed distribution,and sand deposition-erosion behavior around the bridge-road transition.The results indicate that as the wind angle increases,the leeward vortex recirculation zone expands,the peak of the vertical wind speed profile increases,and the horizontal wind speed decreases.With respect to deposition-erosion patterns,the sand deposition length on the windward sides of both the bridge pier and the bridge-road transition decreases with increasing wind angle.In contrast,the deposition length on the leeward side increases.Specifically,when the wind angle increases from 60°to 90°,the windward deposition length at the bridge-road transition decreases from 1.99H to 1.49H(H,the clear height of bridge),while the leeward deposition expands from 0.70H to 13.28H.In addition,the bridge-road transition section serves as a channel for sand transport,promoting the migration of sand toward the subgrade.A smaller wind angle enhances the lateral guidance effect on the wind-sand flow,resulting in a greater sand deposition length on the leeward side of the subgrade.Therefore,the prevention and control of sand hazards in the bridge-road transition section should not be neglected.It is necessary to regularly remove accumulated sand to prevent its spread from the transition section to the subgrade,which could threaten traffic safety. 展开更多
关键词 Wind angles Bridge-road transition sections Wind sand flow field Deposition-erosion characteristics Numerical simulation
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Analysis,modeling,and experimental evaluation of a double-stator piezoelectric inertial actuator driven by different phase angles of the driving current 认领 引用
17
作者 Lusheng Yuan Liang Wang +3 位作者 Yan Li Rui Qi Jiamei Jin Chunsheng Zhao 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2026年第2期352-362,共11页
In dual-stator inertial piezoelectric actuators,the effect of the phase angle of the driving current(PADC) on output performance is poorly understood.In particular,the influence of different phase angles on key perfor... In dual-stator inertial piezoelectric actuators,the effect of the phase angle of the driving current(PADC) on output performance is poorly understood.In particular,the influence of different phase angles on key performance indicators such as speed,displacement,and load capacity remain unclear.This study introduces a doublestator,single-direction type(SDT) piezoelectric inertial actuator and investigates the effect of varying the PADC on its output characteristics through analytical modeling and experimental validation.A prototype actuator is fabricated,and its performance is evaluated at different PADCs.Experimental results show that increasing the PADC significantly improves the speed,step displacement,load capacity,and drive efficiency.For example,atφ=π,the step displacement increases by 445.58%,the load capacity increases by 200%,and the efficiency increases by 442% compared to φ=0.In addition,the step resolution improves by 770% at φ=0 compared toφ=π.This work provides new insights into the PADC optimization of SDT double-stator piezoelectric inertial actuators and guidelines for selecting PADC based on application requirements.The results highlight the actuator's potential for high-precision motion control,and future research could focus on optimizing its design and control strategies to further improve its performance and broaden its applicability. 展开更多
关键词 Inertial actuator Piezoelectric stack Double stator Phase angles of the driving current Negative motion
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Rainfall-induced instability mechanisms and slope angle optimization in open pit mines 认领 引用
18
作者 YANG Xiaojie LIU Keyuan +2 位作者 LEI Xiaotian TAN Xingxing LIU Xingyu 《Journal of Mountain Science》 SCIE CSCD 2026年第6期2927-2947,共21页
Unreasonable design of the slope angle of the open pit mine is one of the main causes of slope instability,and this issue is particularly prominent under rainfall infiltration conditions.Therefore,designing a scientif... Unreasonable design of the slope angle of the open pit mine is one of the main causes of slope instability,and this issue is particularly prominent under rainfall infiltration conditions.Therefore,designing a scientific,economical,and reasonable slope angle based on the failure mechanism of open pit mine slopes is of great significance for the mining safety and long-term stability of open pit mine slopes.This paper aims to propose an MSARMA slope angle optimization method with simple calculation and wide applicability and verify its rationality by utilizing the characteristics of constant-resistance large-deformation(CRLD)anchor cables that can monitor slope stability.Relevant research was carried out by taking four hazardous profiles of the Antaibao Open-pit Coal Mine in China as examples.The results show that slope instability under rainfall infiltration conditions can be divided into four stages through numerical simulation analysis combined with the actual on-site failure process:surface scouring,surface settlement,crack propagation,and shear slip.The slope angles were optimized for the four hazardous profiles with historical landslide occurrences,and the optimization results were verified using field monitoring data.When the slope angles of A-A′,B-B′,C-C′and D-D′dangerous sections are 34°,32°,33°and 33°respectively,the safety,stability,and economic rationality of the slope can be guaranteed.This study provides a theoretical basis and practical reference for slope angle optimization under similar engineering geological conditions. 展开更多
关键词 Slope instability mechanism Numerical simulation Slope angle optimization Msarma Open pit mine
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Long-term outcomes following lens extraction surgery in acute primary angle closure 认领 引用
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作者 Yi-Ning Guo Jing Ding +3 位作者 Hao-Ran Ai Xin-Zuo Zhou Xue-Min Li Chun Zhang 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2026年第2期281-290,共10页
AIM:To investigate the long-term outcomes in acute primary angle closure(APAC)patients treated with lens extraction(LE)surgery and to identify risk factors for glaucomatous optic neuropathy(GON).METHODS:In this longit... AIM:To investigate the long-term outcomes in acute primary angle closure(APAC)patients treated with lens extraction(LE)surgery and to identify risk factors for glaucomatous optic neuropathy(GON).METHODS:In this longitudinal observational study,detailed medical histories of APAC patients and comprehensive ophthalmic examinations at final followup were collected.Logistic regression analysis was performed to identify predictors of blindness.Univariate and multivariate linear regression analyses were conducted to determine risk factors associated with visual outcomes.RESULTS:This study included 39 affected eyes of 31 subjects(26 females)with an average age of 74.1±8.0y.At 6.7±4.2y after APAC attack,2(5.7%)eyes had bestcorrected visual acuity(VA)worse than 3/60.Advanced glaucomatous visual field loss was observed in 15(39.5%)affected eyes and 5(25.0%)fellow eyes.Nine affected eyes(23.7%)had GON,and 11(28.9%)were blind.Six(15.4%)affected eyes and 2(9.1%)fellow eyes had suspicious progression.A significantly higher blindness rate in factory workers compared to office workers.Logistic regression identified that worse VA at attack(OR 10.568,95%CI 1.288-86.695;P=0.028)and worse early postoperative VA(OR 13.214,95%CI 1.157-150.881;P=0.038)were risk factors for blindness.Multivariate regression showed that longer duration of elevated intraocular pressure(P=0.004)and worse early postoperative VA(P=0.009)were associated with worse visual outcomes.CONCLUSION:Despite LE surgery,some APAC patients experience continued visual function deterioration.Lifelong monitoring is necessary.Target pressure and progression rates should be re-evaluated during follow-up. 展开更多
关键词 acute primary angle closure lens extraction surgery long-term follow-up visual impairment glaucomatous optic neuropathy
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Influence of joint angles and in-situ stress on blasting effects in layered rock mass 认领 引用
20
作者 YU Jianxin FENG Yingtao +3 位作者 WEN Jinhao ZHANG Hao WEN Zhijie LI Zhenzhen 《Journal of Mountain Science》 SCIE CSCD 2026年第2期857-868,共12页
Drilling and blasting in layered rock masses faces significant challenges,as pre-existing joints cause unbalanced energy distribution,leading to poor forming effects and severe over-excavation.However,a comprehensive ... Drilling and blasting in layered rock masses faces significant challenges,as pre-existing joints cause unbalanced energy distribution,leading to poor forming effects and severe over-excavation.However,a comprehensive understanding of the complex coupling mechanisms between key joint parameters and the in-situ stress field on the final blasting outcome is still lacking.The model tests are used to quantitatively analyze the macroscopic crushing characteristics and crack propagation velocity.The numerical simulation then reveals the underlying mechanisms of stress wave propagation and energy partitioning,which are validated against the experimental results.The results indicate that the joints and the in-situ stress field play distinct,competitive roles in the blasting outcome.First,the joints control the anisotropy of the damage:crack propagation is primarily guided along the joint direction(the channel effect),and the apparent crack velocity exhibits a V-shaped trend with the joint inclination angle(0°-90°).Second,the in-situ stress state controls the overall extent of the damage:Increased confining pressure(both equal and unequal)inhibits crack propagation by increasing the failure threshold of the rock mass.Mechanistically,while this locking effect enhances stress wave transmission(i.e.,reduces the locking effect),this is secondary to the dominant inhibitory effect of the increased overall rock mass strength.The primary contribution of this study is the identification of this dual control mechanism,revealing that the final blasting effect is a non-linear competition between the joint's structural guidance and the dominant strengthening effect from the in-situ stress field,which clarifies the complex energy partitioning mechanisms at the blast source. 展开更多
关键词 Layered rock mass Joint angle Confining pressure Crack propagation Blasting effect Stress wave propagation
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