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Photostabilization of Poly(butylene adipate-co-terephthalate)(PBAT)Films with Hindered Amine Light Stabilizers:Performance Evaluation and Mechanistic Insights 认领 引用 被引量：1
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作者 Yang Wang Wen-Qing He +9 位作者 Su-Nan Tian Yue Wang Run-Hao Bai Aurore Richel Qiu-Yun Liu Jia-Lei Liu Cai-Bin Li He-Qing Cai Zhi-Chao Zhen Qi Liu 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第4期1046-1058,I0014,共13页
The application of poly(butylene adipate-co-terephthalate)(PBAT)biodegradable plastics has long been constrained by insufficient light aging resistance.Hindered amine light stabilizers(HALSs),known as eco-friendly add... The application of poly(butylene adipate-co-terephthalate)(PBAT)biodegradable plastics has long been constrained by insufficient light aging resistance.Hindered amine light stabilizers(HALSs),known as eco-friendly additives,can scavenge free radicals to enhance polymer durability.However,rough choices have resulted in wastage of resources and environmental pressure.Based on the application of plastic films as the background for use,this study systematically evaluates application effects of five HALSs.The films underwent accelerated aging for various durations and were further investigated by a combination of experiments and molecular simulation.Results showed that all HALSs mitigated PBAT light aging,with Chimassorb-944(UV-944)and Tinuvin-770(UV-770)performing the best for real applications.Quantum chemical calculation results showed that UV-944 had stronger anti migration ability.After 300 h of aging,films with UV-944 and UV-770 retained superior tensile strength and elongation at break in the transverse direction compared to neat PBAT films.Polymeric HALSs provided better long-term stability than small-molecule ones.Further spectra analysis indicated that stronger C―O bonds in HALS/PBAT composites correlated with improved photostability.This study offers valuable insights into improving weather resistance of PBAT biodegradable films and optimizing the real application of HALSs. 展开更多
关键词 Poly(butylene adipate-co-terephthalate) Hindered amine light stabilizers Accelerated aging Light aging resistance Mechanism
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Synergistic redox-coordination molecular stabilizer counters iodine-related degradation for advanced perovskite solar cells 认领 引用
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作者 Yueji Liu Qiyao Guo +9 位作者 Yue Peng Qi Chen Yu Yang Wenqing Lang Jie Dou Xinyu Zhang Yuanyuan Zhao Benlin He Qunwei Tang Jialong Duan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第3期646-656,共11页
As one photovoltaic supernova,perovskite solar cells(PSCs)have exhibited certified power conversion efficiencies exceeding 27%.Yet,the presence of enormous defects,mainly for the dominant iodine vacancy(VI),always ind... As one photovoltaic supernova,perovskite solar cells(PSCs)have exhibited certified power conversion efficiencies exceeding 27%.Yet,the presence of enormous defects,mainly for the dominant iodine vacancy(VI),always induces nonradiative recombination,ion migration,and triggers autocatalytic iodine oxidation into volatile I2 and charge-localization-mediated metallic Pb0clusters,which accelerate device failure and therefore hamper commercialization.However,popularly reported strategies that simultaneously enable vacancy passivation and iodine scavenging remain insufficient,highlighting the need for new additives.Herein,we employ 4-cyanophenylhydrazine hydrochloride(CPHCl)as an iodine-related synergistic redox-coordination stabilizer to address intrinsic instability and interface chemistry issues.After systematically characterizations,we demonstrate that CPHCl not only specifically eliminates I2 intermediates by leveraging the redox-active hydrazine group(NH–NH2)(I2+NH–NH2→2HI+N=NH),but also passivates Pb2+/FA+ related defects viaπ-backdonation and hydrogen bonding by the electron-donating cyano(C≡N)group,synergistically modulating the crystallization kinetics and improving the final quality of the perovskite film.As a result,vacancy-mediated I-ion migration and degradation are significantly relieved,enabling an enhanced efficiency of 25.56%for the p-i-n inverted PSC with exceptional operational stability.This work provides a deep insight into screening perovskite stabilizers for advancing toward commercial longevity. 展开更多
关键词 Perovskite solar cells Redox-coordination stabilizer Crystallization modulation Iodine vacancy Degradation interception
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Elucidating the thermal decomposition mechanism of advanced energetic composites based on nitrated cellulose carbamate/ diethylene glycol dinitrate supplemented with organic stabilizers 认领 引用
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作者 Lokmene Boumaza Ahmed Fouzi Tarchoun +5 位作者 Djalal Trache Amir Abdelaziz Yacine Yahi Nabil Slimani Chemseddine Boustila Thomas M.Klapötke 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第3期16-26,共11页
This study evaluates the stabilizing effect of lignin, extracted from Eucalyptus globulus, on an energetic composite of nitrated cellulose carbamate (NCC) plasticized with diethylene glycol dinitrate (DEGDN), compared... This study evaluates the stabilizing effect of lignin, extracted from Eucalyptus globulus, on an energetic composite of nitrated cellulose carbamate (NCC) plasticized with diethylene glycol dinitrate (DEGDN), compared to conventional stabilizers 2-nitrodiphenylamine (2-NDPA) and 1,3-dimethyl-1,3-diphenylurea (C-II). FTIR analysis confirms lignin's capacity to scavenge nitroxyl radicals formed during thermolysis of nitrocarbamate and nitrate ester bonds, thereby inhibiting decomposition. Moreover, the incorporation of C-II, 2-NDPA, and lignin significantly raised the peak temperature of the main thermolysis, as confirmed by DSC and TGA, indicating a progressive stability enhancement in the order: NCC/DEGDN < NCC/DEGDN/C-II < NCC/DEGDN/lignin < NCC/DEGDN/2-NDPA. Additionally, the effect of each stabilizer on the decomposition pathway was characterized by TGA-FTIR. The findings show that stabilizer type significantly affects the intensity of gaseous products released during decomposition without altering their nature. Notably, NH2 groups formed during NCC degradation play a key role in nitrogen conversion, particularly by reducing toxic NO emissions. 展开更多
关键词 Energetic composite Kraft lignin Stabilizers Thermal behavior Pyrolysis
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New binary quantum stabilizer codes from classical quasi-cyclic codes of index two 认领 引用
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作者 Zhen-Hui Zhang Zhuo Li Li-Juan Xing 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第4期253-264,共12页
We study the algebraic structures of a generalized class of quasi-cyclic codes of index two,and prove that any quasicyclic code of index two can be transformed into our proposed quasi-cyclic codes.We determine the gen... We study the algebraic structures of a generalized class of quasi-cyclic codes of index two,and prove that any quasicyclic code of index two can be transformed into our proposed quasi-cyclic codes.We determine the generator forms of the proposed quasi-cyclic codes and their Hermitian dual codes.We establish the necessary and sufficient conditions for Hermitian self-orthogonality and dual-containing property to construct quantum stabilizer codes via the Hermitian construction method.As an application,10 record-breaking quantum stabilizer codes are constructed. 展开更多
关键词 quasi-cyclic codes quantum stabilizer codes Hermitian inner product Hermitian construction
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Effects of a Full-Solid Waste-Based Soil Stabilizer:Strength,Durability and Microstructure 认领 引用 被引量：2
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作者 PENG Zechuan GAO Yuxin +2 位作者 YANG Wen ZHOU Yichuan GAO Da 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2025年第3期792-800,共9页
This study investigates the use of a low-carbon soil stabilizer called SDG,which is made up of granulated blast furnace slag (GGBFS),desulfurization gypsum (DG),and calcium carbide slag (CCS),to solidify the soil.The ... This study investigates the use of a low-carbon soil stabilizer called SDG,which is made up of granulated blast furnace slag (GGBFS),desulfurization gypsum (DG),and calcium carbide slag (CCS),to solidify the soil.The impact of SDG components on the strength and durability of solidified soil was analysed through a series of tests,including unconfined compressive strength,water stability coefficient,water absorption rate,drying-wetting cycles,and shrinkage tests.Furthermore,microstructure characteristics were analysed using X-ray diffraction (XRD) and scanning electron microscopy (SEM).The study shows that the solidified soil has excellent strength and durability when the SDG stabilizer contains 60% GGBGS,10% DG,and 30% CCS.Additionally,increasing the DG content negatively affects the soil's resistance to water.The SDG stabilizer has potential chemical cementitious characteristics and the calcium carbide slag is rich in calcium ions,which undergo an ion exchange reaction with minerals in the soil.These findings offer new ideas for the development of soil stabilizers. 展开更多
关键词 solid waste soil stabilizer solidification mechanism durability
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Mesoporous SiO2nanoparticles with low surface energy and multi-level roughness as shale wellbore stabilizers in oil-based drilling fluid 认领 引用 被引量：5
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作者 Hong-Yan Du Kai-He Lv +5 位作者 Jin-Sheng Sun Mei-Chun Li Yuan Geng Xian-Bin Huang Hao-Kun Shen Muhammad Arqam Khan 《Petroleum Science》 SCIE EI CAS CSCD 2025年第1期384-397,共14页
Oil-based drilling fluids possess excellent properties such as shale inhibition, cuttings suspension, and superior lubrication, making them essential in the development of unconventional oil and gas reservoirs.However... Oil-based drilling fluids possess excellent properties such as shale inhibition, cuttings suspension, and superior lubrication, making them essential in the development of unconventional oil and gas reservoirs.However, wellbore instability, caused by the invasion of drilling fluids into shale formations, remains a significant challenge for the safe and efficient extraction of shale oil and gas. This work reports the preparation of mesoporous SiO2nanoparticles with low surface energy, utilized as multifunctional agents to enhance the performance of oil-based drilling fluids aimed at improving wellbore stability. The results indicate that the coating prepared from these nanoparticles exhibit excellent hydrophobicity and antifouling properties, increasing the water contact angle from 32°to 146°and oil contact angle from 24°to134.8°. Additionally, these nanoparticles exhibit exceptional chemical stability and thermal resistance.Incorporating these nanoparticles into oil-based drilling fluids reduced the surface energy of the mud cake from 34.99 to 8.17 m J·m-2and increased the roughness of shale from 0.26 to 2.39 μm. These modifications rendered the mud cake and shale surfaces amphiphobic, effectively mitigating capillary infiltration and delaying the long-term strength degradation of shale in oil-based drilling fluids. After 28days of immersion in oil-based drilling fluid, shale cores treated with MF-SiO2exhibited a 30.5% increase in compressive strength compared to untreated cores. Additionally, these nanoparticles demonstrated the ability to penetrate and seal rock pores, reducing the API filtration volume of the drilling fluid from11.2 to 7.6 m L. This study introduces a novel approach to enhance the development of shale gas and oil resources, offering a promising strategy for wellbore stabilization in oil-based drilling fluid systems. 展开更多
关键词 Fluorosilane Wettability Wellbore stability Drilling engineering Self-cleaning Antifouling
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Heat-treated lacquer seed protein isolate as an efficient emulsion stabilizer enhances curcumin protection and delivery via a'gastric shield-intestinal release'mechanism 认领 引用
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作者 Wen Bin Zhu Tian Gong +5 位作者 Xue Yan Yang Chao Qun Zhang Ching Yuan Hu Lin Shan Shi Yan Hui Han Yong Hong Meng 《Food Innovation and Advances》 2025年第4期525-536,共12页
Lacquer tree seed protein isolate(LSPI)is a plant protein with high nutritional value but is often underutilized as animal feed or discarded,leading to waste.We previously showed that heat treatment is more effective ... Lacquer tree seed protein isolate(LSPI)is a plant protein with high nutritional value but is often underutilized as animal feed or discarded,leading to waste.We previously showed that heat treatment is more effective than enzymatic or alkaline modification for improving LSPI's emulsifying properties.In this study,LSPI subjected to heat treatment at different temperatures was used to prepare emulsions for delivering curcumin.These emulsions protected curcumin through a‘gastric shield-intestinal release’mechanism,with 120℃(LPSI-120)identified as the optimal protein treatment temperature.Emulsions stabilized by LSPI-120 achieved a maximum curcumin encapsulation efficiency of 90.7%,representing a 25%improvement over emulsions stabilized by untreated LSPI.Heat treatment strengthened the interfacial protein load,mitigating co-oxidation of lipids,protein,and curcumin during storage.As a result,LSPI-120 retained 59.4%of curcumin after 12 d,1.28-fold higher than the untreated LSPI emulsion.Furthermore,heat-treated LSPI improved the effectiveness of delivery by reducing gastric coalescence,maintaining interfacial integrity,and increasing viscosity.LSPI-120 emulsions exhibited a 62%reduction in gastric coalescence and in viscosity up to 1,381 MPa·s,along with pronounced shear-thinning behavior under intestinal conditions.Ultimately,LSPI-120 emulsions enabled maximal free fatty acid release(22.1μmol/mL)and curcumin bioaccessibility(43.3%).These findings demonstrate that heattreated LSPI can serve as a sustainable and functional delivery material,simultaneously enhancing nutraceutical bioavailability and supporting agricultural by-product valorization. 展开更多
关键词 animal feed curcumin protection alkaline modification lacquer tree seed protein isolate lspi plant protein heat treated lacquer seed protein isolate gastric shield intestinal release emulsion stabilizer
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Effects of Adjusting Backpack Shoulder Stabilizers on Psychological Responses and Autonomic Nerve Activity in Hiking 认领 引用
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作者 Hisashi Mitsuishi Mikitoshi Tabuchi 《Health》 2025年第1期1-12,共12页
Purpose: There have been many studies on the effects of different types of backpacks on posture from a biomechanical perspective and on the center of gravity. Considering the effects of autonomic nervous system activi... Purpose: There have been many studies on the effects of different types of backpacks on posture from a biomechanical perspective and on the center of gravity. Considering the effects of autonomic nervous system activity and mood associated with backpacks in mountaineering and hiking, research is also needed from a psychological perspective. In this study, the effects of adjusting the backpack shoulder stabilizer were preliminarily tested in terms of subjective fatigue and changes in autonomic nervous activity after hiking. Methods: The experimental 15 healthy participants hiked the mountain under two conditions: 1) without adjusting the stabilizer, a feature of the backpack (NAH condition), and 2) with the stabilizer adjusted (AH condition). First, all participants hiked the mountain in the NAH condition, and after a 30-minute break, they began the hike in the AH condition after confirming that a) their heart rate had recovered and b) they were in good physical condition. Results: HR was significantly lower after each hiking session than during the session. RMSSD was significantly lower pre-AH and post-AH than the NAH condition, but there was no significant difference between the NAH condition and either post-NAH or post-AH. Additionally, RMSSD was significantly lower in the AH condition than pre-AH or post-AH. The shoulders and back were significantly more burdened in the NAH condition than in the AH condition. The pleasure level was significantly higher in the AH condition than in the NAH condition. Conclusion: The results showed that also adjusting the position of the waist belt when adjusting the shoulder stabilizer, which is mainly used for the neck and shoulders, has a significant positive effect on the subjective burden on the upper body and parasympathetic nervous system activity after hiking. 展开更多
关键词 Shoulder Stabilizer Autonomic Nervous System RMSSD Pleasure Level
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Metal lanolin fatty acid as novel thermal stabilizers for rigid poly(vinyl chloride) 认领 引用 被引量：10
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作者 郭勇 郑玉婴 +2 位作者 邱尚长 曾安然 李宝铭 《Journal of Rare Earths》 SCIE EI CAS CSCD 2011年第5期401-406,共6页
The synergistic stabilization effect of different metal lanolin fatty acids as natural-based thermal stabilizers for poly（vinyl chloride） （PVC） including calcium lanolin fatty acid （Calan2）,zinc lanolin fatty ac... The synergistic stabilization effect of different metal lanolin fatty acids as natural-based thermal stabilizers for poly（vinyl chloride） （PVC） including calcium lanolin fatty acid （Calan2）,zinc lanolin fatty acid （Znlan2） and lanthanum lanolin fatty acid （Lalan3） were studied through Congo red testing,color measurements,FTIR analyses and thermal behavior in this paper. The results showed that Lalan3/Calan2/Znlan2 stabilizers exhibited more excellent thermal stabilization efficiency to PVC than Calan2/Znlan2 thermal stabilizers,and the optimal mass ratio of Lalan3/Calan2/Znlan2 was 8：9：3. At last,the effect of degradation mechanism on PVC and synergistic stabilization was also investigated by FTIR analyses and thermal behavior. 展开更多
关键词 poly（vinyl chloride） rare-earth stabilizer lanolin fatty acid calcium/zinc stabilizers
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SYNTHESIS AND CHARACTERIZATION OF NEW STABILIZERS WITH OPTIMAL MOLECULAR WEIGHT 认领 引用 被引量：3
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作者 Jiang-qing Pan 《Chinese Journal of Polymer Science》 SCIE EI CAS 2001年第4期341-350,共10页
Over 2 x 10(8)tons of polymers are produced every year,and a large portion of polymers faces the degradation problem.There are many effective methods to protect polymers against degradation and the addition of stabili... Over 2 x 10(8)tons of polymers are produced every year,and a large portion of polymers faces the degradation problem.There are many effective methods to protect polymers against degradation and the addition of stabilizers to polymer remains the most convenient and effective way of enhancing polymer life and performance.In this article,a series of effective stabilizers with optimal molecular weight(MW),including common,monomeric and polymeric stabilizers(antioxidant and light stabilizer)were synthesized using isocyanation,controlled isocyanation,hydrosilylation,epoxide addition,macroreaction of stabilizing functional compounds and polymerization of monomeric stabilizers.The structure and performance of these new stabilizers were characterized by using IR,NMR,MS,UV-spectra,XPS and elemental analysis.The current development of stabilizer synthesis was also reviewed. 展开更多
关键词 preparation of stabilizer antioxidant hindered amine light stabilizer isocyanation hydrosilylation
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Theory and Practice of Ionic Soil Stabilizer Reinforcing Special Clay 认领 引用 被引量：14
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作者 项伟 崔德山 +2 位作者 刘清秉 卢雪松 曹李靖 《Journal of Earth Science》 SCIE CAS 2010年第6期882-887,共6页
The change in the thickness of water films of special clay particles such as sliding clay, red clay, and expansive clay is an important factor in producing geological disasters and geological environmental damage. In ... The change in the thickness of water films of special clay particles such as sliding clay, red clay, and expansive clay is an important factor in producing geological disasters and geological environmental damage. In order to reduce the thickness of water films, ionic soil stabilizer （ISS） is used to treat sliding clay, red clay, and expansive clay. Direct shear test of sliding clay and shrinkage, free swell rate, zeta potential, and cation-exchange capacity of red clay and expansive clay are carried out. The results show that as the plastic indexes of special clay soil decrease, the shear strength of sliding clay increases, the shrinkage and free swell rate of red clay and expansive clay decrease, and the thickness of the water film thins after treatment with the ionic soil stabilizer. Therefore, the geological engineering disasters caused by changes in the thickness of water films of special clay can be effectively inhibited. 展开更多
关键词 ionic soil stabilizer sliding clay red clay expansive clay.
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Multi-objective optimization of frequency and damping of vertical stabilizer skin structure placed with variable-angle tows 认领 引用 被引量：6
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作者 Lei ZU Xianzhao XIA +7 位作者 Qian ZHANG Guiming ZHANG Shijun CHEN Jianhui FU Lichuan ZHOU Huabi WANG Debao LI Liqing ZOU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第1期444-455,共12页
The vibration characteristics of composite vertical stabilizer skin structures play a critical role in damping effects designed for overcoming the air disturbances experienced by aircraft structural components during ... The vibration characteristics of composite vertical stabilizer skin structures play a critical role in damping effects designed for overcoming the air disturbances experienced by aircraft structural components during flight.The first-order fundamental frequencies and their corresponding damping characteristics of the vertical stabilizer skin structure tow-steered by automatic fiber placement technique were optimized with the parameterized trajectories and plies as design variables.Firstly,the vibration and damping numerical models were derived based on Kirchhoff laminate theory,the Rayleigh-Ritz method,and the Strain Energy Method.Then the optimization model was developed by adopting the self-adaptive Differential Evolution Multi-objective optimization algorithm and incorporating the solution method of Pareto Front.The constraints of this optimization model considered the experimentally obtained minimum turning radius of prepregs tow-steered in automatic fiber placement process obtained from experimental tests.Finally,the comparison of numerical simulation results was conducted for the optimized trajectories and the conventional straight trajectories under various boundary conditions,and the numerical results were partially validated through damping and frequency tests.The results indicate the vibration characteristics of the composite vertical stabilizer skin structure can be enhanced to a large extent by optimizing fiber trajectories,and the enhancement percentage is affected by the boundary conditions of the actual structure. 展开更多
关键词 Damping Fundamental frequency Multi-objective optimiza-tion Variable-angle tow Vertical stabilizer skin Vibration properties
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Robust adaptive precision motion control of tank horizontal stabilizer based on unknown actuator backlash compensation 认领 引用 被引量：5
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作者 Shu-Sen Yuan Wen-Xiang Deng +1 位作者 Jian-Yong Yao Guo-Lai Yang 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2023年第2期72-83,共12页
Backlash nonlinearity inevitably exists in the actuator of tank horizontal stabilizer and has adverse effect on the system control performance,however,how to effectively eliminate its effect remains a pending issue.To... Backlash nonlinearity inevitably exists in the actuator of tank horizontal stabilizer and has adverse effect on the system control performance,however,how to effectively eliminate its effect remains a pending issue.To solve this problem,a robust adaptive precision motion controller is presented in this paper to address uncertainties and unknown actuator backlash of tank horizontal actuator.The controller handles the modeling uncertainties including parameter uncertainties and unmodeled disturbances by integrating adaptive feedforward compensation and continuous nonlinear robust law.Based on the backstepping method,a smooth backlash inverse model is constructed by combining the adaptive idea.Meanwhile,the unknown backlash parameters of the system can be approximated through the parameter adaptation,and the impact of the actuator backlash nonlinearity is effectively compensated via the inverse operation,which can availably improve the tracking performance.Moreover,the adaptive law can update the disturbance ranges of tank horizontal stabilizer online in real time,which enhances the feasibility in practical engineering applications.Furthermore,the stability analysis based on Lyapunov function shows that with the existence of unmodeled disturbances and unknown actuator backlash,the designed controller guarantees excellent asymptotic output tracking performance.Extensive comparative results verify the effectiveness of the proposed control strategy. 展开更多
关键词 Tank Horizontal stabilizer Adaptive control Robust control Backlash inverse
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Study on Mechanism of Rare Earth PVC Stabilizer 认领 引用 被引量：6
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作者 彭振博 胡斌 +1 位作者 苏庆德 曲锦忠 《Journal of Rare Earths》 SCIE EI CAS 2003年第3期328-330,共3页
Rare earth compounds can be used as PVC thermal stabilizers. According to the infrared spectra of the mixture of PVC and some stearates, the mechanism of stabilization of different stearates was studied. The specialty... Rare earth compounds can be used as PVC thermal stabilizers. According to the infrared spectra of the mixture of PVC and some stearates, the mechanism of stabilization of different stearates was studied. The specialty of rare earth stabilizers was found. They can change the conformation of PVC and restrain the elimination of HCl. From this aspect, the unique synergetic effect with other stabilizers of rare earth compounds can be explained. 展开更多
关键词 organic chemistry PVC stabilizer infrared spectroscopy synergetic effect rare earths
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Power system stabilizer design using hybrid multi-objective particle swarm optimization with chaos 认领 引用 被引量：10
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作者 Mahdiyeh Eslami Hussain Shareef Azah Mohamed 《Journal of Central South University》 SCIE EI CAS 2011年第5期1579-1588,共10页
A novel technique for the optimal tuning of power system stabilizer (PSS) was proposed,by integrating the modified particle swarm optimization (MPSO) with the chaos (MPSOC).Firstly,a modification in the particle swarm... A novel technique for the optimal tuning of power system stabilizer (PSS) was proposed,by integrating the modified particle swarm optimization (MPSO) with the chaos (MPSOC).Firstly,a modification in the particle swarm optimization (PSO) was made by introducing passive congregation (PC).It helps each swarm member in receiving a multitude of information from other members and thus decreases the possibility of a failed attempt at detection or a meaningless search.Secondly,the MPSO and chaos were hybridized (MPSOC) to improve the global searching capability and prevent the premature convergence due to local minima.The robustness of the proposed PSS tuning technique was verified on a multi-machine power system under different operating conditions.The performance of the proposed MPSOC was compared to the MPSO,PSO and GA through eigenvalue analysis,nonlinear time-domain simulation and statistical tests.Eigenvalue analysis shows acceptable damping of the low-frequency modes and time domain simulations also show that the oscillations of synchronous machines can be rapidly damped for power systems with the proposed PSSs.The results show that the presented algorithm has a faster convergence rate with higher degree of accuracy than the GA,PSO and MPSO. 展开更多
关键词 passive congregation chaos power system stabilizer penalty function particle swarm optimization
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Encoding entanglement-assisted quantum stabilizer codes 认领 引用 被引量：5
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作者 Wang Yun-Jiang Bai Bao-Ming +2 位作者 Li Zhuo Peng Jin-Ye Xiao He-Ling 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第2期88-93,共6页
We address the problem of encoding entanglement-assisted （EA） quantum error-correcting codes （QECCs） and of the corresponding complexity. We present an iterative algorithm from which a quantum circuit composed of ... We address the problem of encoding entanglement-assisted （EA） quantum error-correcting codes （QECCs） and of the corresponding complexity. We present an iterative algorithm from which a quantum circuit composed of CNOT, H, and S gates can be derived directly with complexity O（n2） to encode the qubits being sent. Moreover, we derive the number of each gate consumed in our algorithm according to which we can design EA QECCs with low encoding complexity. Another advantage brought by our algorithm is the easiness and efficiency of programming on classical computers. 展开更多
关键词 quantum error correction entanglement-assisted quantum stabilizer codes encodingcomplexity
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Mechanical Behaviors of ZrO_2-Al_2O_3 Ceramic Composites with Y_2O_3 as Stabilizer 认领 引用 被引量：4
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作者 丘泰 王玉春 沈春英 《Journal of Rare Earths》 SCIE EI CAS 2005年第3期280-284,共5页
The ZrO2-Al2O3 ceramic composites were prepared by appropriate techniques with commercial ZrO2 and Al2O3 powders as raw materials and Y2O3 as stabilizer. The results indicate that with the introduction of Al2O3 into t... The ZrO2-Al2O3 ceramic composites were prepared by appropriate techniques with commercial ZrO2 and Al2O3 powders as raw materials and Y2O3 as stabilizer. The results indicate that with the introduction of Al2O3 into the ZrO2 matrix where the quantity of additive Y2O3 is 3.5% (mole fraction), the growth of ZrO2 grains is efficiently inhibited, which helps the ZrO2 grains exist in a metastable tetragonal manner; thus higher strength and toughness are acquired. When the content of alumina is 20% (mass fraction), the bending strength and fracture toughness of the composites are 676.7 MPa and 10 MPa·m1/2 respectively, the mechanical behaviors are close to those prepared with ZrO2 and Al2O3 powders synthesized through wet chemical approach. The mechanical behaviors of the composites are well improved owing to the dispersion toughening of alumina grains and phase transformation toughening of zirconia grains. 展开更多
关键词 inorganic non-metallic materials zirconia-alumina ceramic composites yttria stabilizer mechanical behaviors toughening mechanism rare earths
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Roles of effective stabilizers in improving oral bioavailability of naringenin nanocrystals:Maintenance of supersaturation generated upon dissolution by inhibition of drug dimerization 认领 引用 被引量：2
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作者 Guangshuai Zhang Haishan Guan +9 位作者 Jianfeng Li Mo Li Xiaofan Sui Baocheng Tian Huiming Dong Bingyang Liu Zhonggui He Ning Li Mingming Zhao Qiang Fu 《Asian Journal of Pharmaceutical Sciences》 SCIE CAS 2022年第5期741-750,共10页
Nanocrystals(NCs),a colloidal dispersion system formulated with stabilizers,have attracted widespread interest due to their ability to effectively improve the oral bioavailability of poorly water-soluble drugs.The sta... Nanocrystals(NCs),a colloidal dispersion system formulated with stabilizers,have attracted widespread interest due to their ability to effectively improve the oral bioavailability of poorly water-soluble drugs.The stabilizer plays a key role because it can affect the physical stability and even the oral bioavailability of NCs.However,how stabilizers affect the bioavailability of NCs remains unknown.In this study,F68,F127,HPMC,and PVP were each used as a stabilizer to formulate naringenin NCs.The NCs formulated with PVP exhibited excellent release behaviors,cellular uptake,permeability,oral bioavailability,and anti-inflammatory effects.The underlying mechanism is that PVP effectively inhibits the formation of naringenin dimer,which in turn improves the physical stability of the supersaturated solution generated when NC is dissolved.This finding provides insights into the effects of stabilizers on the in vivo performances of NCs and supplies valuable knowledge for the development of poorly water-soluble drugs. 展开更多
关键词 Nanocrystals Stabilizers Bioavailability Supersaturation maintenance Dimer
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Deposition of Pd on Co(OH)2 nanoplates in stabilizer-free aqueous phase for catalytic reduction of 4-nitrophenol 认领 引用 被引量：2
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作者 Zeng-min TANG Ling ZHANG +1 位作者 Jing-jing DU Li-jian XU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第6期1994-2002,共9页
Palladium-supported cobalt hydroxide(Co(OH)2-Pd) nanoplates were fabricated in an aqueous solution and employed as a catalyst for the reduction of 4-nitrophenol.For the preparation of Co(OH)2-Pd,Pd nanoparticles we... Palladium-supported cobalt hydroxide(Co(OH)2-Pd) nanoplates were fabricated in an aqueous solution and employed as a catalyst for the reduction of 4-nitrophenol.For the preparation of Co(OH)2-Pd,Pd nanoparticles were anchored on the Co(OH)2 nanoplates after the reduction of Na;PdCl;by ascorbic acid in the absence of a stabilizer at room temperature.The observations under transmission and scanning electron microscopy reveal that Pd nanoparticles with a size of 2-5 nm are uniformly dispersed on the surface of the Co(OH)2 nanoplates.In catalytic test,the conversion of 4-nitrophenol to 4-aminophenol is completed within 6 min in the presence of Co(OH)2-Pd(1000) nanoplates with2.18 at.% Pd,and the corresponding kinetic constant is 0.0089 s;in the first test.The catalyst retains relatively high activity after several cycles.The results demonstrate that the Co(OH)2-Pd(1000) nanoplates exhibit high catalytic activity toward the reduction of 4-nitrophenol in the presence of NaBH;. 展开更多
关键词 Pd nanoparticles Co(OH)2nanoplates free stabilizer catalyst 4-nitrophenol
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Efficient placement technology of proppants based on structural stabilizers 认领 引用 被引量：1
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作者 GUO Jianchun REN Shan +3 位作者 ZHANG Shaobin DIAO Su LU Yang ZHANG Tao 《Petroleum Exploration and Development》 SCIE 2024年第3期706-714,共9页
Fiber is highly escapable in conventional slickwater,making it difficult to form fiber-proppant agglomerate with proppant and exhibit limited effectiveness.To solve these problems,a novel structure stabilizer(SS)is de... Fiber is highly escapable in conventional slickwater,making it difficult to form fiber-proppant agglomerate with proppant and exhibit limited effectiveness.To solve these problems,a novel structure stabilizer(SS)is developed.Through microscopic structural observations and performance evaluations in indoor experiments,the mechanism of proppant placement under the action of the SS and the effects of the SS on proppant placement dimensions and fracture conductivity were elucidated.The SS facilitates the formation of robust fiber-proppant agglomerates by polymer,fiber,and quartz sand.Compared to bare proppants,these agglomerates exhibit reduced density,increased volume,and enlarged contact area with the fluid during settlement,leading to heightened buoyancy and drag forces,ultimately resulting in slower settling velocities and enhanced transportability into deeper regions of the fracture.Co-injecting the fiber and the SS alongside the proppant into the reservoir effectively reduces the fiber escape rate,increases the proppant volume in the slickwater,and boosts the proppant placement height,conveyance distance and fracture conductivity,while also decreasing the proppant backflow.Experimental results indicate an optimal SS mass fraction of 0.3%.The application of this SS in over 80 wells targeting tight gas,shale oil,and shale gas reservoirs has substantiated its strong adaptability and general suitability for meeting the production enhancement,cost reduction,and sand control requirements of such wells. 展开更多
关键词 hydraulic fracturing proppant structure stabilizer placement mechanism conductivity proppant backflow rate
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