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Intracellular recording and morphology of tectal neurons activated by contralateral nucleus isthmi in toads

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Chinese Science Bulletin 1997年第19期42卷 1647-1651页

作者： wang, sr Wu, GY Laboratory for Visual Information Processing Institute of Biophysics Chinese Academy of Sciences Beijing China

THE nucleus isthmi (NI) in lower vertebrates and its mammalian analogue, the nucleus para-bigeminalis, are all visual centres. They receive their tectal input ipsilaterally and project backipsilaterally in teleosts and birds, or bilaterally in amphibians and reptiles, as well as in mam-mals. It is well known that NI receives its visual excitation through the ipsilateral optic tec-tum (OT). NI mainly exerts inhibition on the ipsilateral OT in frogs.A recent study

关键词： nucleus isthmi tectum intracellular recording morphology toad

Neurotransmitter and receptor in pigeon retinotectal transmission

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Chinese Science Bulletin 1997年第20期42卷 1738-1740页

作者： Jiang, PH Gao, HF wang, sr Inst Biophys Lab Visual Informat Proc Beijing 100101 Peoples R China

THE retina in birds projects to the contralateral tectum. Our previous study and some otherphysiological, histochetnical and neurochemical evidence have suggested that the retino-tectal projection in birds might use glutamate as an excitatory transmitter. However, very lit-tle is known about its particular receptor type(s), because there are at least three major phar-macologically defined types of glutamate receptors: NMDA, AMPA/Kainate, andmetabotropic glutamate receptors.

关键词： glutamate receptor retinotectal transmission tectal cells pigeon.

Study　on　the　Methods　Of　Adsorbent　Enriching－SFE　Desorbing　and　Off－line　GC－MS－DS　Determination　of　Trace　Organic　Pollutants　from　Coal　Smoke

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Chinese Chemical Letters 1996年第11期7卷 1061-1064页

作者： Cui, ZJ Gao, LC Zhang, CY wang, sr SHANDONG UNIV DEPT ENVIRONM ENGNJINAN 250100PEOPLES R CHINA

The optimum conditions of supercritical fluid extraction(SFE) desorping the organic pollutants adsorbed and enriched by the adsorbent Porapak P and the effects of the conditions on the efficiencies ofSFE desorping organic pollutants are studied emphatically. Different kinds of organic adsorbents andmodifiers were tested. The recoveries of SFE are compared with Soxhlet extraction. The recoveries between93.1% and 109.3% are obtained for 25 kinds of compounds at 35 MPa, 100℃and 9.0ml SF-CO2, andtheir relative standard deviations (RSD) are in the range of 0.6-12.6 percent.

关键词： GC Off MS line DS SFE

腹主动脉部分缩窄大鼠模型体外心脏的电生理特点

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中国组织工程研究与临床康复 2007年第8期11卷 1469-1472,1476页

作者：倪量王硕仁中医内科学教育部重点实验室(北京中医药大学) 北京市重点实验室(中医内科学)北京市100700

目的:观察腹主动脉部分缩窄模型大鼠体外心脏的电生理特点。方法:实验于2005-04/08在北京中医药大学东直门医院重点实验室完成。①取雄性SD大鼠30只,单纯随机分为3组,正常组6只,假手术组和模型组各12只,后2组又分为造模后4,8周2个时间点... 详细信息

目的:观察腹主动脉部分缩窄模型大鼠体外心脏的电生理特点。方法:实验于2005-04/08在北京中医药大学东直门医院重点实验室完成。①取雄性SD大鼠30只,单纯随机分为3组,正常组6只,假手术组和模型组各12只,后2组又分为造模后4,8周2个时间点,每个时间点6只。②造模后4周、8周采用飞利浦HDI5000超声诊断仪、15MHz高频线阵探头,经胸骨旁左室长轴切面检测大鼠心脏左室室壁厚度及左室腔内径。③超声检测完毕后剪取大鼠心脏,称量左室质量,计算左室心肌质量指数(实测左室质量/体表面积)。④造模后第8周时取下心脏进行体外灌流,吸附电极记录单相动作电位,测量动作电位复极20%,50%,90%的时间(APD20,APD50,APD90),有效不应期,动作电位最大幅度,零相上升的最大速度。结果:经补充后29只大鼠进入结果分析。①心脏超声指标比较:造模后第4周模型组室间隔舒张末期厚度大于假手术组[(2.57±0.35),(1.86±0.15)mm,P<0.01];造模后第8周模型组室间隔舒张末期厚度、左室后壁舒张末期厚度和左室舒张末期内径均大于假手术组[(2.52±0.32),(1.94±0.07)mm,P<0.01;(2.54±0.30),(2.06±0.11)mm,P<0.01;(6.27±0.54),(5.65±0.34)mm,P<0.05];模型组左室舒张末期内径第8周较第4周显著增加(P<0.01)。②左室心肌质量指数:造模后第4,8周,模型组均高于假手术组[(28.88±2.57),(15.10±1.49)g/m2;(31.09±2.85),(28.88±2.57)g/m2;P均<0.01]。③体外心脏电生理参数:模型组左心房APD90长于假手术组(P<0.05),有效不应期/APD90比值小于假手术组(P<0.05);左心室APD20,APD50,APD90和有效不应期长于假手术组(P<0.01,0.05),有效不应期/APD90比值小于假手术组(P<0.05);右心室各参数比较无差异;模型组APD90离散度(左心室-右心室)显著高于假手术组[(56.8±4.7),(18.7±4.0)ms,P<0.01];模型组有效不应期离散度(左心室-右心室)也显著高于假手术组[(25.4±1.1),(5.2±0.8)ms,P<0.01]。结论:部分缩窄大鼠腹主动脉模型的早期(4周)是由压力负荷致心脏左室向心性肥厚的模型,随着压力负荷的持续和容量负荷的增加,左室逐渐演变为向心性肥厚和离心性肥厚的混和型肥厚(8周)。混合型肥厚心脏左心室、左心房单相动作电位的复极时间均显著延长,心脏不同部位离散度增加,这些电生理特点是促进折返形成,造成心律失常的主要原因。

关键词：腹主动脉部分缩窄大鼠心脏电生理

Dual modulation of homogeneous nanomaterialization and electrochemical activation enhancing zinc ion storage

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Science China Chemistry 2025年第1期68卷 385-393页

作者： Jianwei wang Huan wang Kangning wang Wenhui wang Wenlin Zhang Yanzhong Zhen School of Chemistry & Chemical Engineering Yan'an University

Vanadium-based electrode materials are widely investigated,but the low specific capacity and slow electrochemical kinetics in aqueous zinc-ion batteries still limit their commercial ***,the VS2/Ca V4O9material with the morphology of nanoflower was synthesized by a one-step hydrothermal *** to the blocky structure of pure VS2material,the VS2/Ca V4O9material is composed of thinner homogeneous *** open structures could provide abundant electrochemical active sites and ion transport channels,and then promote the electrochemical reaction *** addition,they can also buffer the bulk strain during the reaction *** improve the utilization of vanadium elements,an in-situ electrochemical activation strategy is used to explore the storage performance of the VS2/Ca V4O9material,the different activation voltage range of 0.4–1.6 and 0.4–1.4 V are selected,*** with the longer activation plateau of activated-VS2,the VS2/Ca V4O9cathode could quickly reach the activation state in the range of 1.4–1.6 V and cause the release of additional Zn storage sites *** VS2/Ca V4O9cathode delivers a higher power density of 37,000 W kg-1and a significant energy density of 423 Wh *** the high current density of 15 A g-1,the VS2/Ca V4O9cathode still has a discharge capacity of 183.9m Ah g-1after 5,000 cycles,and the capacity decay rate per cycle is only 0.0042%.Continuous cyclic voltammetry （CV） curves,electrochemical impedance spectroscopy （EIS） measurements,density functional theory （DFT） calculation and galvanostatic intermittent titration technique （GITT） measurements demonstrate that the VS2/Ca V4O9cathode has a faster ion diffusion/charge transfer ***,the assembled flexible device has an excellent mechanical stability.

关键词： dual modulation homogeneous nanomaterialization electrochemical activation zinc ion storage

An Iterated Greedy Algorithm with Memory and Learning Mechanisms for the Distributed Permutation Flow Shop Scheduling Problem

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Computers, Materials & Continua 2025年第1期82卷 371-388页

作者： Binhui wang Hongfeng wang College of Information Science and Engineering Northeastern UniversityShenyang110819China

The distributed permutation flow shop scheduling problem(DPFSP)has received increasing attention in recent *** iterated greedy algorithm(IGA)serves as a powerful optimizer for addressing such a problem because of its straightforward,single-solution evolution ***,a potential draw-back of IGA is the lack of utilization of historical information,which could lead to an imbalance between exploration and exploitation,especially in large-scale *** a consequence,this paper develops an IGA with memory and learning mechanisms(MLIGA)to efficiently solve the DPFSP targeted at the ***,we incorporate a memory mechanism to make a more informed selection of the initial solution at each stage of the search,by extending,reconstructing,and reinforcing the information from previous *** addition,we design a twolayer cooperative reinforcement learning approach to intelligently determine the key parameters of IGA and the operations of the memory ***,to ensure that the experience generated by each perturbation operator is fully learned and to reduce the prior parameters of MLIGA,a probability curve-based acceptance criterion is proposed by combining a cube root function with custom *** last,a discrete adaptive learning rate is employed to enhance the stability of the memory and *** ablation experiments are utilized to verify the effectiveness of the memory mechanism,and the results show that this mechanism is capable of improving the performance of IGA to a large ***,through comparative experiments involving MLIGA and five state-of-the-art algorithms on 720 benchmarks,we have discovered that MLI-GA demonstrates significant potential for solving large-scale *** indicates that MLIGA is well-suited for real-world distributed flow shop scheduling.

关键词： Distributed permutation flow shop scheduling makespan iterated greedy algorithm memory mechanism cooperative reinforcement learning

Controlled cationic ring-opening polymerization of L-lactide by organic ion pair: novel approach to isotactic-rich and crystalline polylactide

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Science China Chemistry 2025年第1期68卷 394-402页

作者： Zhiqiang Ding Mingqian wang Zijing Zhou Bin wang Yuesheng Li Tianjin Key Laboratory of Composite & Functional Materials School of Materials Science and Engineering Tianjin University

Living/controlled cationic ring-opening polymerization （ROP） of L-lactide is a promising approach to isotactic-rich and crystalline poly（L-lactide）.In contrast with the unsubstituted lactones,L-LA can not be polymerized by organic Lewis acids or carbenium ions,and the state of the art in this field is the cationic ROP of L-LA catalyzed by Br?nsted acid/alcohol system via activated monomer ***,we reported the first example of controlled cationic ROP of L-LA by using Meerweintype ion pair[Me3O]+[B（C6F5）4]-as the catalyst.[Me3O]+[B（C6F5）4]-promoted rapid L-LA cationic polymerization in the absence of alcohol,producing isotactic-rich and crystalline PLLA without transesterification and epimerization side *** activated chain end mechanism,involving twice SN2 substitution and configuration-inversion （S→R→S） with the assistance of released Me2O,was proposed and further verified by density functional theory and control *** work expands the catalytic toolbox of isotactic-rich and crystalline polylactide *** represents a unique example of cationic-controlled polymerization of L-LA catalyzed by an organic ion pair.

关键词： organic ion pair controlled cationic ring-opening polymerization activated chain end mechanism isotactic-rich polylactide

Impact of Startup Strategy and Buffer Tank Volume on the Compressor Inlet State for a 3-MW sCO2 Brayton Cycle

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Journal of Thermal Science 2025年第1期34卷 159-175页

作者： ZHAO Decai wang Bo Key Laboratory of Advanced Energy and Power Institute of Engineering Thermophysics(IET)Chinese Academy of Sciences (CAS) University of Chinese Academy of Sciences

The supercritical carbon dioxide（sCO2） Brayton cycle system has become an emerging and highly promising method of thermal power conversion due to its efficiency advantage,system compactness,and excellent adaptability of the heat *** the low carbon sCO2Brayton cycle testbed with cycle output power approaching 3 MW,a relatively detailed dynamic simulation model of the entire system is constructed to explore the dynamic response characteristics of the system with different startup strategies and different buffer tank volumes during the startup *** simulation results indicate that the smaller the volume of the buffer tank,the more rapid and obvious the parameter fluctuation in the buffer tank during the *** the allowable relative deviation limit of density is 5%,then the ratio of the buffer tank volume to the volume of the entire closed loop should not be lower than 36.80%.The strategy of simultaneous temperature and speed increase during turbine bypass start can effectively reduce the fluctuation of compressor inlet parameters and reach the steady-state more *** paper provides the recommended matching table for the opening of the turbine bypass valve（TBV） and the main regulating valve（MGV） to reduce the parameter fluctuation during the bypass *** effectiveness of the proposed turbine bypass and bypass switching startup strategy is verified by simulation,which may be used as a reference for test bench's future debugging and operation.

关键词： buffer tank dynamic characteristic dynamic model sCO2 Brayton cycle startup strategy

The Hilbert expansion of the Boltzmann equation in the incompressible Euler level in a channel

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Science China Mathematics 2025年第1期68卷 39-88页

作者： Feimin Huang Weiqiang wang Yong wang Feng Xiao Academy of Mathematics and Systems Science Chinese Academy of Sciences School of Mathematical Sciences University of Chinese Academy of Sciences Key Laboratory of Computing and Stochastic Mathematics (Ministry of Education) School of Mathematics and StatisticsHunan Normal University

The study of the hydrodynamic limit of the Boltzmann equation with physical boundary is a challenging problem due to the appearance of the viscous and Knudsen boundary *** this paper,the hydrodynamic limit from the Boltzmann equation with the specular reflection boundary condition to the incompressible Euler equations in a channel is *** on the multi-scaled Hilbert expansion,the equations with boundary conditions and compatibility conditions for interior solutions,and viscous and Knudsen boundary layers are derived under different scaling,***,some uniform estimates for the interior solutions,and viscous and Knudsen boundary layers are *** the help of the L2-L∞framework and the uniform estimates obtained above,the solutions to the Boltzmann equation are constructed by the truncated Hilbert expansion with multiscales,and hence the hydrodynamic limit in the incompressible Euler level is justified.

关键词： Boltzmann equation incompressible Euler equations hydrodynamic limit Hilbert expansion specular reflection boundary condition viscous boundary layer Knudsen boundary layer