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Proteomic investigation reveals the molecular mechanisms of plant height regulation in foxtail millet 认领 引用
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作者 Zhiying Zhao Wanting Li +11 位作者 Yifei Wang Meng Jin Wenqiang Tang Jiayi Li Renliang Zhang Yaxian Zhang Peiyong Xin Jinfang Chu Yingjie Gao Sha Tang Xianmin Diao Baowen Zhang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第4期1402-1417,共16页
Plant height is an essential characteristic of agronomic traits,and an ideal plant height is essential for achieving high crop yields.Foxtail millet(Setaria italica)has become a novel diploid C4 model crop.The prot... Plant height is an essential characteristic of agronomic traits,and an ideal plant height is essential for achieving high crop yields.Foxtail millet(Setaria italica)has become a novel diploid C4 model crop.The proteomic profiles of the internode,node,and leaf in two foxtail millet varieties with different heights,Ci846 and Yugu 18,were investigated at the jointing stage in this study.There were different degrees of enrichment in various processes,such as plant hormone signal transduction,the MAPK signaling pathway,and others.In particular,the proper content of auxin could activate downstream SiARFsSiSAURs expression,which enhances the length of internodes.Haplotype analysis of SiSAUR-like revealed two differential haplotypes of associated plant height,Hap1 and Hap2.The molecular marker SiSAUR-like-FCM1-2 can effectively separate materials into Hap1 and Hap2.Two additional genes,designated SiGH3 and SiTCH4,were found to be associated with plant height regulation.In conclusion,this study not only uncovers the crucial role of auxin regulators in modulating plant height during the jointing stage but also provides molecular markers that will be invaluable for molecular breeding efforts.The findings of this research help to elucidate the molecular mechanisms of plant height determination that can be used for crop variety innovation and breeding. 展开更多
关键词 plant height proteomics foxtail millet auxin molecular marker
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Gut Associated Metabolites Enhance PD-L1 Blockade Efficacy in Prostate Cancer 认领 引用
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作者 Ke Liu Xia Xue +11 位作者 Haiming Qin Jiaying Zhu Meng Jin Die Dai Youcai Tang Ihtisham Bukhari Hangfan Liu Chunjing Qiu Feifei Ren Pengyuan Zheng Yang Mi Weihua Chen 《Oncology Research》 SCIE 2026年第2期550-569,共20页
Background:The gut microbiome has emerged as a critical modulator of cancer immunotherapy response.However,the mechanisms by which gut-associated metabolites influence checkpoint blockade efficacy in prostate cancer(P... Background:The gut microbiome has emerged as a critical modulator of cancer immunotherapy response.However,the mechanisms by which gut-associated metabolites influence checkpoint blockade efficacy in prostate cancer(PC)remain not fully explored.The study aimed to explore how gut metabolites regulate death-ligand 1(PD-L1)blockade via exosomes and boost immune checkpoint inhibitors(ICIs)in PC.Methods:We recruited 70 PC patients to set up into five subgroups.The integrated multi-omics analysis was performed.In parallel,we validated the function of gut microbiome-associated metabolites on PD-L1 production and immunotherapy treatment efficacy in PC cell lines and transgenic adenocarcinoma of the mouse prostate(TRAMP)models.Results:We identified two metabolites,16(R)-Hydroxyeicosatetraenoic acid(16(R)-HETE)and 6-Keto-Prostaglandin E1(6-Keto-PGE1),that positively correlated with the plasma exosomal PD-L1 levels.The in vitro experiments found that both 16(R)-HETE and 6-Keto-PGE1 can enhance PD-L1 expression at the mRNA,protein,and exosome levels in both human and mouse PC cell lines,which were also validated in vivo based on subcutaneous mouse models.Both metabolites significantly promoted the anti-PD-L1 efficacy against PC in situ on a TRAMP mouse model.Conclusions:Targeting the“gut-tumor metabolic axis”is a promising strategy to improve the efficacy of immune checkpoint inhibitors in tumors. 展开更多
关键词 Gut microbiome metabolites prostate cancer programmed death-ligand 1 immunotherapy gut-tumor metabolic axis
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翼型前缘宏观点阵结构气动噪声控制方法 认领 引用
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作者 沈淳 李壮 +4 位作者 孟晋 孙潇伟 张成春 陈正武 梁东 《吉林大学学报（工学版）》 EI CAS CSCD 北大核心 2026年第1期86-95,共10页
在标准NACA0012翼型前缘设计了点阵(点阵列)扰流结构,在来流攻角0°、速度20 m/s和30 m/s的条件下,在声学风洞测试验证了凸点阵列具有明显降噪效果。与标准翼型相比,20 m/s来流条件下点阵前缘翼型总声压级降噪量达3.6 dB;30 m/s来... 在标准NACA0012翼型前缘设计了点阵(点阵列)扰流结构,在来流攻角0°、速度20 m/s和30 m/s的条件下,在声学风洞测试验证了凸点阵列具有明显降噪效果。与标准翼型相比,20 m/s来流条件下点阵前缘翼型总声压级降噪量达3.6 dB;30 m/s来流条件下点阵翼型噪声频谱曲线各处均低于声学风洞背景噪声,而标准翼型总声压级与背景噪声相比高1.5 dB,即在30 m/s来流条件下,点阵翼型总声压级降噪量至少为1.5 dB。采用大涡模拟(Large eddy simulation,LES)/FW-H(Ffowcs williams hawkings)声学比拟混合预测方法,从翼型表面压力扰动源展向相干性角度阐释了前缘点阵翼型降噪机制。针对30 m/s来流条件下声学风洞测试结果无法完全反映点阵翼型真实降噪效果的问题,采用数值方法比较了20 m/s和30 m/s两种来流条件声压级频谱特征,发现点阵结构在两种速度下具有几乎相同的降噪效果。最后,系统分析了前缘阵列结构高度和排数等参数对降噪效果的影响规律,为前缘阵列扰流结构工程参数化设计提供了支撑。 展开更多
关键词 流动噪声控制 翼型叶片 混合预测 气动噪声 流动控制 展向相干性
水导轴承间隙率对三轴承型核主泵轴系振动影响分析 认领 引用
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作者 张福海 王路遥 +7 位作者 孟晋 于丽红 王运喜 朱建斌 张诚 陈锦裕 刘祥松 袁宏 《核动力工程》 EI CAS CSCD 北大核心 2026年第3期207-216,共10页
针对三轴承型核主泵在厂内测试和电站服役期出现的轴位移幅值过大、波动超限问题,本文以“华龙一号”机组某三轴承轴封型主泵为研究对象,基于流体动力学和转子动力学计算方法,深入探究核主泵轴系的振动特征,重点研究水导轴承间隙率(研... 针对三轴承型核主泵在厂内测试和电站服役期出现的轴位移幅值过大、波动超限问题,本文以“华龙一号”机组某三轴承轴封型主泵为研究对象,基于流体动力学和转子动力学计算方法,深入探究核主泵轴系的振动特征,重点研究水导轴承间隙率(研究范围0.1%~0.2%)对液膜环流特性及核主泵轴系转子动力学特征(包括振动幅值空间分布、轴心轨迹、频率成分等)的影响,进而为三轴承型核主泵设计改进、设备可靠性提升作支撑。研究发现:水导轴承间隙率对液膜流体的湍流与层流功率损失比有显著影响,当间隙率较小时,湍流损耗减小,水导轴承主阻尼大幅提高,使得洛马金效应显著增强,从而提升轴系的稳定性;水导轴承间隙率对三轴承型核主泵振动幅值有显著影响,在较小间隙率条件下,核主泵轴系整体的振动幅值显著降低;水导轴承间隙率对三轴承型核主泵“水膜涡动”有显著影响,在较小的间隙率条件下,洛马金效应得到显著增强,从而能够有效抑制“水膜涡动”所伴随的半频分量振动。研究成果有助于核主泵的结构优化设计、振动治理、故障诊断及电站的运维管理。 展开更多
关键词 核主泵 水导轴承 间隙率 轴系振动 半频分量 数值计算
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面向机器人集群控制的轻量级Mesh广播算法研究 认领 引用
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作者 邓志吉 王明慧 +4 位作者 杜龙 孟金 杨照辉 刘圣波 吕杨棋 《物联网学报》 2026年第2期65-77,共13页
随着物联网与机器人技术的深度融合,构建高效可靠的通信网络成为支持机器人协同作业的关键基础。针对机器人系统在动态复杂环境中对通信网络提出的低时延、高可靠性与轻量化需求,提出一种基于邻居信息推测的广播优化(SRB,speculative re... 随着物联网与机器人技术的深度融合,构建高效可靠的通信网络成为支持机器人协同作业的关键基础。针对机器人系统在动态复杂环境中对通信网络提出的低时延、高可靠性与轻量化需求,提出一种基于邻居信息推测的广播优化(SRB,speculative reception-based broadcasting)算法。该算法通过引入邻居管理与推测接收机制,有效解决了传统泛洪算法中“广播风暴”、冗余转发和能耗过高等问题。SRB利用节点间周期交换的邻居信息,推测其邻居是否已接收到当前数据包,从而决策是否转发,避免不必要的重复传输。通过仿真和机器人原型系统对所提算法进行了性能评估,实验结果表明,SRB在数据包可达率、端到端时延、转发率等关键指标上均优于传统泛洪算法。 展开更多
关键词 物联网 机器人 Mesh网络 泛洪算法
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Genome-wide enhancer RNA profiling adds molecular links between genetic variation and human cancers 认领 引用 被引量：4
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作者 Yi-Min Cai Ze-Qun Lu +27 位作者 Bin Li Jin-Yu Huang Ming Zhang Can Chen Lin-Yun Fan Qian-Ying Ma Chun-Yi He Shuo-Ni Chen Yuan Jiang Yan-Min Li Cai-Bo Ning Fu-Wei Zhang Wen-Zhuo Wang Yi-Zhuo Liu Heng Zhang Meng Jin Xiao-Yang Wang Jin-Xin Han Zhen Xiong Ming Cai Chao-Qun Huang Xiao-Jun Yang Xu Zhu Ying Zhu Xiao-Ping Miao Shao-Kai Zhang Yong-Chang Wei Jian-Bo Tian 《Military Medical Research》 SCIE CAS CSCD 2025年第4期488-511,共24页
Background:Dysregulation of enhancer transcription occurs in multiple cancers.Enhancer RNAs(eRNAs)are transcribed products from enhancers that play critical roles in transcriptional control.Characterizing the genetic ... Background:Dysregulation of enhancer transcription occurs in multiple cancers.Enhancer RNAs(eRNAs)are transcribed products from enhancers that play critical roles in transcriptional control.Characterizing the genetic basis of eRNA expression may elucidate the molecular mechanisms underlying cancers.Methods:Initially,a comprehensive analysis of eRNA quantitative trait loci(eRNAQTLs)was performed in The Cancer Genome Atlas(TCGA),and functional features were characterized using multi-omics data.To establish the first eRNAQTL profiles for colorectal cancer(CRC)in China,epigenomic data were used to define active enhancers,which were subsequently integrated with transcription and genotyping data from 154 paired CRC samples.Finally,largescale case-control studies(34,585 cases and 69,544 controls)were conducted along with multipronged experiments to investigate the potential mechanisms by which candidate eRNAQTLs affect CRC risk.Results:A total of 300,112 eRNAQTLs were identified across 30 different cancer types,which exert their influence on eRNA transcription by modulating chromatin status,binding affinity to transcription factors and RNA-binding proteins.These eRNAQTLs were found to be significantly enriched in cancer risk loci,explaining a substantial proportion of cancer heritability.Additionally,tumor-specific eRNAQTLs exhibited high responsiveness to the development of cancer.Moreover,the target genes of these eRNAs were associated with dysregulated signaling pathways and immune cell infiltration in cancer,highlighting their potential as therapeutic targets.Furthermore,multiple ethnic population studies have confirmed that an eRNAQTL rs3094296-T variant decreases the risk of CRC in populations from China(OR=0.91,95%CI 0.88–0.95,P=2.92×10-7)and Europe(OR=0.92,95%CI 0.88–0.95,P=4.61×10-6).Mechanistically,rs3094296 had an allele-specific effect on the transcription of the eRNA ENSR00000155786,which functioned as a transcriptional activator promoting the expression of its target gene SENP7.These two genes synergistically suppressed tumor cell proliferation.Our curated list of variants,genes,and drugs has been made available in CancereRNAQTL(http://gffzz7ae2bb80e0cc4912h6ucbxw9wcfuf6bcw.ffgz.tsg.suse.edu.cn/#/)to serve as an informative resource for advancing this field.Conclusion:Our findings underscore the significance of eRNAQTLs in transcriptional regulation and disease heritability,pinpointing the potential of eRNA-based therapeutic strategies in cancers. 展开更多
关键词 Enhancer RNA(eRNA) eRNA quantitative trait loci(eRNAQTLs) Genome-wide association study(GWAS) ENSR00000155786 SENP7
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Synergy of compress strain and antioxidant of platinum-copper for enhanced the oxygen reduction performance 认领 引用 被引量：2
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作者 Jun Zhang Pingjuan Liang +9 位作者 Xinlan Xu Rong Wang Shuyue Liu Chunyuan Wang Boyu Liu Laizheng Luo Meng Jin Huan Liu Huan Yi Shi-Yu Lu 《Nano Materials Science》 EI CAS CSCD 2025年第1期105-112,共8页
The development of efficient and durable electrocatalysts for oxygen reduction reaction(ORR)holds a pivotal significance in the successful commercialization of proton exchange membrane fuel cells(PEMFCs)but is still c... The development of efficient and durable electrocatalysts for oxygen reduction reaction(ORR)holds a pivotal significance in the successful commercialization of proton exchange membrane fuel cells(PEMFCs)but is still challenging.Herein,we report a worm-liked PtCu nanocrystals dispersed on nitrogen-doped carbon hollow microspheres(Pt0.38Cu0.62/N-HCS).Benefiting from its structural and compositional advantages,the resulting Pt0.38Cu0.62/N-HCS catalyst delivers exceptional electrocatalytic activity for ORR,with a half-wave potential(E1/2)of 0.837 V,a mass activity of 0.672 A mgPt-1,and a Tafel slope of 50.66 mV dec-1,surpassing that of commercial Pt/C.Moreover,the Pt0.38Cu0.62/N-HCS follows the desired four-electron transfer mechanism throughout the ORR process,thereby displaying a high selectivity for direct reduction of O2to H2O.Remarkably,this catalyst also showcases high stability,with only a 25 mV drop in E1/2after 10,000 cycles in an acidic electrolyte.Theoretical calculations elucidate the incorporation of Cu into Pt lattice induces compressive strain,which effectively tailors the d band center of Pt active sites and strengthens the surface chemisorption of O2molecules on PtCu alloys.Consequently,the Pt0.38Cu0.62/N-HCS catalyst exhibits an improved ability to adsorb O2molecules on its surface,accelerating the reaction kinetics of O2conversion to*OOH.Additionally,Cu atoms,not only serving as sacrificial anode,undergo preferential oxidation during PEMFCs operation when compared to Pt,but also the stable Cu species in PtCu alloys contributes significantly to maintaining the strain effect,collectively enhancing both activity and durability.Overall,this research offers an effective and promising approach to enhance the activity and stability of Pt-based ORR electrocatalysts in PEMFCs. 展开更多
关键词 PtCu alloy Compressive strain Oxygen reduction reaction Activity and durability Cu oxidation
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Dentition of Subengius mengi (Mammalia: Plesiadapoidea) and a reassessment of the phylogenetic relationships of Asian Carpolestidae 认领 引用
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作者 K. Christopher BEARD NI Xi-Jun +2 位作者 WANG Yuan-Qing MENG Jin Daniel L. GEBO 《古脊椎动物学报》 CSCD 北大核心 2016年第3期181-211,共31页
New fossils pertaining to the oldest known Asian plesiadapiform, the Gashatan carpolestid Subengius mengi, clarify aspects of the dental anatomy of this taxon. The dentition of S. mengi is substantially more primitive... New fossils pertaining to the oldest known Asian plesiadapiform, the Gashatan carpolestid Subengius mengi, clarify aspects of the dental anatomy of this taxon. The dentition of S. mengi is substantially more primitive than previously recognized in retaining a lower dental formula of 2.1.3.3, a low-crowned p4 with three main cusps that are less fully connate than their counterparts in species of Elphidotarsius, P3 with a narrower and structurally simpler lingual margin, and in lacking widely splayed paraconid and metaconid on ml. The unique structure of P3 in S. mengi and a reassessment of P3 anatomy in Elphidotarsius sp., cf. E. florencae, suggest that certain cusp homologies on P3 in Carpolestidae have been misinterpreted in the past. Following a detailed character analysis, the phylogenetic relationships of carpolestids and their close relatives are reconstructed. The Bumbanian taxon Chronolestes simul is recovered as the most basal member of Carpolestidae. S. mengi and a second Bumbanian taxon, Carpocristes oriens, also appear to be relatively basal members of the carpolestid radiation, although none of these Asian carpolestid taxa seems to be specially related to each other. Dispersal of carpolestids between Asia and North America appears to have been restricted to earlier parts of the Paleocene, although carpolestids survived on both continents until sometime near the Paleocene-Eocene boundary. 展开更多
关键词 Paleocene, Gashatan, Plesiadapiformes, biogeography, phylogeny
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A high output power 340 GHz balanced frequency doubler designed based on linear optimization method 认领 引用
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作者 LIU Zhi-Cheng ZHOU Jing-Tao +5 位作者 MENG Jin WEI Hao-Miao YANG Cheng-Yue SU Yong-Bo JIN Zhi JIA Rui 《红外与毫米波学报》 SCIE EI CAS CSCD 北大核心 2025年第2期184-191,共8页
In this paper,a linear optimization method(LOM)for the design of terahertz circuits is presented,aimed at enhancing the simulation efficacy and reducing the time of the circuit design workflow.This method enables the ... In this paper,a linear optimization method(LOM)for the design of terahertz circuits is presented,aimed at enhancing the simulation efficacy and reducing the time of the circuit design workflow.This method enables the rapid determination of optimal embedding impedance for diodes across a specific bandwidth to achieve maximum efficiency through harmonic balance simulations.By optimizing the linear matching circuit with the optimal embedding impedance,the method effectively segregates the simulation of the linear segments from the nonlinear segments in the frequency multiplier circuit,substantially improving the speed of simulations.The design of on-chip linear matching circuits adopts a modular circuit design strategy,incorporating fixed load resistors to simplify the matching challenge.Utilizing this approach,a 340 GHz frequency doubler was developed and measured.The results demonstrate that,across a bandwidth of 330 GHz to 342 GHz,the efficiency of the doubler remains above 10%,with an input power ranging from 98 mW to 141mW and an output power exceeding 13 mW.Notably,at an input power of 141 mW,a peak output power of 21.8 mW was achieved at 334 GHz,corresponding to an efficiency of 15.8%. 展开更多
关键词 linear optimization method(LOM) three-dimensional electromagnetic model(3D-EM) Harmonic impedance optimization Schottky planar diode Terahertz frequency doubler
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Analysis of auxiliary antenna array effect on performance of wideband noncooperative interference cancellation 认领 引用
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作者 LI Zheyu LI Yaxing +3 位作者 WANG Ze LIANG Jiaqi HE Fangmin MENG Jin 《Journal of Systems Engineering and Electronics》 SCIE CSCD 2025年第5期1188-1201,共14页
In wideband noncooperative interference cancellation,the reference signals obtained through auxiliary antennas are weighted to cancel with the interference signal.The correlation between the reference signal and the i... In wideband noncooperative interference cancellation,the reference signals obtained through auxiliary antennas are weighted to cancel with the interference signal.The correlation between the reference signal and the interference signal determines interference cancellation performance,while the auxiliary antenna array affects the correlation by influencing the amplitude and phase of the reference signals.This paper analyzes the effect of auxiliary antenna array on multiple performances of wideband noncooperative interference cancellation.Firstly,the array received signal model of wideband interference is established,and the weight vector coupled with the auxiliary antennas array manifold is solved by spectral analysis and eigen-subspace decomposition.Then,multiple performances which include cancellation resolution,grating null,wideband interference cancellation ratio(ICR),and convergence rate are quantitatively characterized with the auxiliary antenna array.It is obtained through analysis that the performances mutually restrict the auxiliary antenna array.Higher cancellation resolution requires larger array aperture,but when the number of auxiliary antennas is fixed,larger array aperture results in more grating nulls.When the auxiliary antennas are closer to the main antenna,the wideband ICR is improved,but the convergence rate is reduced.The conclusions are verified through simulation of one-dimensional uniform array and two-dimensional nonuniform array.The experiments of three arrays are compared,and the results conform well with simulation and support the theoretical analysis. 展开更多
关键词 auxiliary antenna array noncooperative interference cancellation wideband interference performance analysis
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湖北省2242名医疗放射工作人员肝肾功能的调查分析 认领 引用
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作者 应宇辰 孟进 +4 位作者 潘毅华 张雨茜 朱巧巧 涂彧 高锦 《工业卫生与职业病》 CAS 2026年第1期46-51,共6页
目的探讨长期接触低剂量电离辐射的医疗放射工作人员肝肾功能健康情况,为职业健康监护提供科学依据。方法通过监测收集某医院2020—2022年2242名医疗放射工作人员的职业健康检查资料,以进行在岗或离岗检查的1800名人员资料作为暴露组,... 目的探讨长期接触低剂量电离辐射的医疗放射工作人员肝肾功能健康情况,为职业健康监护提供科学依据。方法通过监测收集某医院2020—2022年2242名医疗放射工作人员的职业健康检查资料,以进行在岗或离岗检查的1800名人员资料作为暴露组,以同期内进行岗前健康检查的442名人员资料作为对照组。收集肝肾功能相关的生化指标以及腹部B超结果,并对肝肾功能的影响因素进行统计分析。结果暴露组丙氨酸氨基转移酶(alanine aminotransferase,ALT)、γ-谷氨酰转移酶(gamma-glutamyl transferase,GGT)、球蛋白(globulin,Glo),白球比(albumin-globulin ratio,A/G)高于对照组(t=5.527、5.775、3.614、5.014,P<0.05);白蛋白(albumin,ALB)比对照组低(t=-4.650,P<0.05)。ALT、GGT异常率高于对照组(χ2=15.410、6.311,P<0.05);暴露组尿素(blood urea nitrogen,BUN)、肌酐(creatinine,CR)、尿酸(uric acid,UA)值分别为4.92 mmol/L、70.85 mmol/L和377.15 mmol/L,均高于对照组(t=2.191、2.012、2.297,P<0.05);尿酸异常率高于对照组(χ2=4.991,P<0.05)。暴露组放射工作人员肝肾异常率分别为14.32%和4.28%,暴露组B超肝异常检出率低于对照组(OR=0.702,95%CI=0.539~0.913);暴露组B超肾异常检出率为38.8%,也低于对照组(OR=0.602,95%CI=0.350~1.035)。结论长期低剂量电离辐射会引起放射工作人员肝、肾功能异常。 展开更多
关键词 低剂量电离辐射 放射工作人员 肝 肾
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Inheritance and Sustainable Development of Concession Gardens of Tianjin City,China 认领 引用
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作者 MENG Jin CHEN Liang 《Journal of Landscape Research》 2012年第11期34-36,共3页
Through reviewing development history of concession gardens in Tianjin City,features,advantages and problems of these gardens were analyzed.It was stressed that cultural context should be inherited,and features of the... Through reviewing development history of concession gardens in Tianjin City,features,advantages and problems of these gardens were analyzed.It was stressed that cultural context should be inherited,and features of the city highlighted.The gardens should be protected from the perspective of development,combined with urban green space system,integrated with cultural life of local citizens,and coordinated with contemporary architectural style of the city.In addition,plant landscapes should be enriched,and infrastructure of the gardens supplemented to properly handle the relationship between urban construction and protection of historical image,and provide reference for inheriting cultural context of the city in the urban development. 展开更多
关键词 Tianjin City Concession garden Inheritance Sustainable development
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Characterization and recognition of three-dimensional excitation-emission matrix spectra of wastewater from six typical categories 认领 引用 被引量：3
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作者 Litao Kuang Rui Liu +4 位作者 Meng Jin Yaqiong Lan Yingying Su Yuan Zhao Lujun Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2025年第11期206-219,共14页
In this study,we analyzed the characteristics of three-dimensional excitation-emission matrix spectra(EEMs)of 150 samples from five industrial wastewater types and domestic sewage to track water pollution sources effe... In this study,we analyzed the characteristics of three-dimensional excitation-emission matrix spectra(EEMs)of 150 samples from five industrial wastewater types and domestic sewage to track water pollution sources effectively.We then developed a recognition model for wastewater EEMs by establishing a feature dataset containing fluorescence peak values and parameters derived from EEMs,integrated with machine learning techniques.This model enables the rapid and precise identification of pollution sources.Our findings suggest that although the EEMs of the sixwastewater categories are distinct,visual differentiation is challenging.This was confirmed by cosine similarity assessments,showing some samples with low within-group(0.95)similarities.Despite significant variations in EEMs features acrosswastewater categories,identifying specific pollutants remains difficult,especially for pulp mills and leather effluents.Among the tested classification algorithms,Support Vector Machine(SVM)achieved the highest performance with91.7%accuracy,94%precision,91%recall,and 92%F1-score,outperforming K-Nearest Neighbors and Partial Least Squares Discriminant Analysis.The SVM significantly improved identification accuracy for pulpmill and leather processing wastewaters compared to other models.To enhance identification accuracy,further exploration of EEMs features and expanding the training dataset are recommended.Combining EEMs features with machine learning presents a promising method for improvingwater pollution supervision and source tracing in environmental management practices. 展开更多
关键词 Excitation-emission-matrix spectra Support vector machine K-nearest neighbor Industrial wastewater Domestic sewage Partial least squares discriminant analysis
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Inheritance and Sustainable Development: Countermeasures for the Development of Tianjin Concession Parks 认领 引用
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作者 CHEN Liang MENG Jin 《Journal of Landscape Research》 2016年第5期45-47,52,共3页
Through the overview of the development history of Tianjin Concession Parks, this paper analyzed the historical significance of Tianjin Concession Parks and put forward its existing problems, then summed up a series o... Through the overview of the development history of Tianjin Concession Parks, this paper analyzed the historical significance of Tianjin Concession Parks and put forward its existing problems, then summed up a series of strategies of sustainable development as follows: adhering to the Florence Charter; retaining the original form and texture of the Concession Parks; adopting a dynamic philosophy of protection and preservation; integrating with citizens' social life; supplementing and improving infrastructure facilities; and achieving environmental regeneration by planting. All these efforts are expected to contribute to making a balance between the development and construction of urban cities and the preservation of historical features, as well as provide lessons for inheriting urban history and culture in the future. 展开更多
关键词 Tianjin Concession park Inheritance Sustainable development
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降水梯度带气候和土壤对狗尾草化学计量特征变异的贡献差异 认领 引用
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作者 孟进 徐霆飞 +1 位作者 马金灵 王忠媛 《浙江农林大学学报》 CAS CSCD 北大核心 2026年第4期828-838,共11页
【目的】分析广布种狗尾草Setaria viridis器官间的养分化学计量模式及其驱动因子,揭示狗尾草在大区域尺度下的资源获取策略和生长适应性。【方法】选取中国东南湿润区至西北干旱区降水梯度带上10处样点,以广布种狗尾草为目标植物,测定... 【目的】分析广布种狗尾草Setaria viridis器官间的养分化学计量模式及其驱动因子,揭示狗尾草在大区域尺度下的资源获取策略和生长适应性。【方法】选取中国东南湿润区至西北干旱区降水梯度带上10处样点,以广布种狗尾草为目标植物,测定其根、茎、叶的碳、氮、磷化学计量指标,采用单因素方差分析与主成分分析等方法,探究狗尾草化学计量沿降水梯度带的变异规律,用结构方程模型和层次分割法进一步揭示驱动化学计量变异的主要环境因子。【结果】(1)狗尾草各器官全碳质量分数变异系数最低(根为9.13%,叶为11.70%),而全氮、全磷变异较大,反映了限制性元素对环境变化的敏感响应。(2)纬度与海拔等地理因子对化学计量特征无显著直接效应,其影响主要通过调控气候与土壤条件而间接实现。(3)器官间环境驱动因子存在分化:根化学计量变异主要由土壤因子解释,茎变异主要受气候因子主导,叶化学计量特征则与年均降水量、光合有效辐射和土壤全磷呈显著正相关(P<0.01)。【结论】狗尾草器官间化学计量特征在不同样点间存在显著分异,主要由环境因子(气候、土壤)驱动。植物的化学多样性是由大尺度气候条件筛选出的基础资源利用策略(第1主成分)与局部土壤异质性(尤其是磷)所细化的具体适应性特征(第2主成分)通过层级调控共同决定的。这些发现强调了从器官尺度理解植物适应性分异的重要性,为更精准地预测未来气候变化下植物的响应与适应轨迹提供了新的视角。 展开更多
关键词 生态化学计量特征 狗尾草 土壤因子 气候因子 地理梯度
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Multifunctional Asymmetric Bilayer Aerogels for Highly Efficient Electromagnetic Interference Shielding with Ultrahigh Electromagnetic Wave Absorption 认领 引用 被引量：6
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作者 Cheng‑Zhang Qi Peng Min +6 位作者 Xinfeng Zhou Meng Jin Xia Sun Jianjun Wu Yanjun Liu Hao‑Bin Zhang Zhong‑Zhen Yu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2025年第11期680-697,共18页
Although multifunctional electromagnetic interference(EMI)shielding materials with ultrahigh electromagnetic wave absorption are highly required to solve increasingly serious electromagnetic radiation and pollution an... Although multifunctional electromagnetic interference(EMI)shielding materials with ultrahigh electromagnetic wave absorption are highly required to solve increasingly serious electromagnetic radiation and pollution and meet multi-scenario applications,EMI shielding materials usually cause a lot of reflection and have a single function.To realize the broadband absorption-dominated EMI shielding via absorption-reflection-reabsorption mechanisms and the interference cancelation effect,multifunctional asymmetric bilayer aerogels are designed by sequential printing of a MXene-graphene oxide(MG)layer with a MG emulsion ink and a conductive MXene layer with a MXene ink and subsequent freeze-drying for generating and solidifying numerous pores in the aerogels.The top MG layer of the asymmetric bilayer aerogel optimizes impedance matching and achieves re-absorption,while the bottom MXene layer enhances the reflection of the incident electromagnetic waves.As a result,the asymmetric bilayer aerogel achieves an average absorption coefficient of 0.95 in the X-band and shows the tunable absorption ability to electromagnetic wave in the ultrawide band from 8.2 to 40 GHz.Finite element simulations substantiate the effectiveness of the asymmetric bilayer aerogel for electromagnetic wave absorption.The multifunctional bilayer aerogels exhibit hydrophobicity,thermal insulation and Joule heating capacities and are efficient in solar-thermal/electric heating,infrared stealth,and clean-up of spilled oil. 展开更多
关键词 Multifunctional bilayer aerogels Electromagnetic interference shielding MXene sheets Graphene oxide Infrared stealth and camouflage
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New Material of the Zalambdalestid Zhangolestes(Mammalia,Zalambdalestidae)from the Late Cretaceous Changchunsaurus Fauna of Jilin,China 认领 引用 被引量：1
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作者 CHEN Jun MAO Fangyuan +1 位作者 WU Wenhao MENG Jin 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2025年第3期634-645,共12页
We report new material of the zalambdalestid,Zhangolestes jilinensis,from the Quantou Formation(lower Upper Cretaceous,Cenomanian to Turonian),Gongzhuling City,Jilin Province,NE China.Using micro-CT-scan,the material ... We report new material of the zalambdalestid,Zhangolestes jilinensis,from the Quantou Formation(lower Upper Cretaceous,Cenomanian to Turonian),Gongzhuling City,Jilin Province,NE China.Using micro-CT-scan,the material is shown to include dentocranial and postcranial elements recovered from the same matrix block containing the holotype specimen.The CT-images also show the labial and internal structures of the holotype fragment of the lower jaw of Z.jilinensis.Based on the preservation,relative size,and tooth wear,the new material and the holotype lower jaw likely belong to the same individual animal,whereas the hypodigm mandibular fragment assigned to Z.jilinensis in the original study is thought now to belong to a different individual,potentially representing a different species,which,if true,would increase the eutherian diversity in the Late Cretaceous Changchunsaurus Fauna.Furthermore,the new CT-images show that the incisor morphology is diverse within zalambdalestids and probably evolved independently from the enlarged incisors in placental mammals,such as Glires. 展开更多
关键词 vertebrate paleontology morphology Zalambdalestidae Quantou Formation Cenomanian-Turonian Jilin Province
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基于螺栓失效工况的风机塔筒结构受力特性 认领 引用
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作者 李杨 王焕然 +2 位作者 洪华斌 孟金 沈佳轶 《中国海洋平台》 2026年第2期16-21,36,共6页
针对螺栓失效工况下海上风机塔筒结构稳定性问题,采用Abaqus建立塔筒-法兰-螺栓数值模型,开展不同螺栓失效比例下塔筒、法兰和螺栓的受力特性数值模拟研究。结果表明:迎风面处的法兰和螺栓应力大于背风面;螺栓失效比例对迎风面螺栓和法... 针对螺栓失效工况下海上风机塔筒结构稳定性问题,采用Abaqus建立塔筒-法兰-螺栓数值模型,开展不同螺栓失效比例下塔筒、法兰和螺栓的受力特性数值模拟研究。结果表明:迎风面处的法兰和螺栓应力大于背风面;螺栓失效比例对迎风面螺栓和法兰的应力变化影响显著,但对背风面影响不大;塔筒的水平位移随螺栓失效比例上升而增加;螺栓、法兰和塔筒达到屈服应力所需的螺栓失效比例分别为10%、20%和20%,表明螺栓失效会引发法兰应力增大,最终导致塔筒结构失稳。研究成果可为海上风机塔筒设计和稳定性评价提供技术支持。 展开更多
关键词 海上风机 螺栓失效 塔筒稳定性 螺栓法兰 数值模拟 受力特性
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基于优化边界单元法的主墩横梁支架受力性能研究 认领 引用
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作者 关志勇 孟进 +2 位作者 付雷 伍金玉 严圣圣 《公路与汽运》 2026年第3期128-132,共5页
湖北宜来(宜都-来凤)高速公路某特大桥主墩横梁采用托架施工,支架主要受力结构为分配梁、贝雷架、支撑架,通过横梁将荷载传递至牛腿上。文中以该桥下横梁为研究对象,在优化边界刚度法的基础上建立有限元模型,对横梁支架中牛腿、横梁、... 湖北宜来(宜都-来凤)高速公路某特大桥主墩横梁采用托架施工,支架主要受力结构为分配梁、贝雷架、支撑架,通过横梁将荷载传递至牛腿上。文中以该桥下横梁为研究对象,在优化边界刚度法的基础上建立有限元模型,对横梁支架中牛腿、横梁、贝雷架、分配梁、支撑架的受力性能进行分析,并提出相应加固措施。有限元模型模拟结果表明,采取加固措施后横梁受力性能得到改善,达到设计要求。 展开更多
关键词 桥梁 高墩 横梁 支架 牛腿 受力性能
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一体式球囊支架系统镍钛合金血管支架安全性能研究 认领 引用
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作者 胡万清 卢平方 +2 位作者 肖本好 孟晋 任明明 《青岛医药卫生》 2026年第3期197-203,共7页
外周动脉闭塞性疾病(PAOD)是血管外科常见疾病,目前主要介入治疗是球囊扩张联合支架植入术,但需多次器械交换,增加手术风险和成本。支架在长期使用中常面临疲劳断裂、腐蚀穿孔及表面磨损等问题,导致使用寿命缩短。为了系统地评价自主研... 外周动脉闭塞性疾病(PAOD)是血管外科常见疾病,目前主要介入治疗是球囊扩张联合支架植入术,但需多次器械交换,增加手术风险和成本。支架在长期使用中常面临疲劳断裂、腐蚀穿孔及表面磨损等问题,导致使用寿命缩短。为了系统地评价自主研发的新型一体式球囊支架系统的自膨式镍钛合金血管支架的安全可靠性(专利号:ZL 201821340207.3),本研究从支架柔顺性、腐蚀敏感度、表面磨损情况、疲劳强度及球囊性能等多维度展开研究。通过构建模拟血管环境的疲劳耐久性测试(3.8亿次循环)、激光共聚焦显微镜表面磨损分析、电化学腐蚀敏感度测试及血管模型柔顺性检测等实验方法,发现0.165 mm镍钛(NiTi)形状记忆合金单丝编织并打磨处理后的一体式球囊支架表现出优异性能:疲劳强度满足10年使用寿命要求(3.8亿次循环后无断裂、移位),柔顺性良好(最小弯曲半径15 mm时内腔通畅),表面磨损深度较普通支架降低40%,且无明显腐蚀击穿痕迹现象。此外,球囊额定爆破压达22.1 atm,疲劳测试10次循环无泄漏。本研究通过对比实验发现,新型一体式球囊支架的疲劳强度、抗腐蚀性和耐磨损性能显著优于普通支架。该支架系统兼具形状记忆和耐疲劳性、抗腐蚀性、耐磨损等优点,安全性能较好。 展开更多
关键词 一体式球囊支架 镍钛合金血管支架 球囊 扩张导管
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