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An efficient numerical shape analysis for light weight membrane structures

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2014年第4期15卷 255-271页

作者： Chao yanG yan-bin shen Yao-zhi LUO Space Structures Research Center Zhejiang University Hangzhou 310058 China

The determination of initial equilibrium shapes is a common problem in research work and engineering applications related to membrane structures. Using a general structural analysis framework of the finite particle method （FPM）, this paper presents the first application of the FPM and a recently-developed membrane model to the shape analysis of light weight mem- branes. The FPM is rooted in vector mechanics and physical viewpoints. It discretizes the analyzed domain into a group of parti- cles linked by elements, and the motion of the free particles is directly described by Newton＇s second law while the constrained ones follow the prescribed paths. An efficient physical modeling procedure of handling geometric nonlinearity has been developed to evaluate the particle interaction forces. To achieve the equilibrium shape as fast as possible, an integral-form, explicit time integration scheme has been proposed for solving the equation of motion. The equilibrium shape can be obtained naturally without nonlinear iterative correction and global stiffness matrix integration. Two classical curved surfaces of tension membranes pro- duced under the uniform-stress condition are presented to verify the accuracy and efficiency of the proposed method.

关键词： Tension membranes Finite particle method (FPM) Shape analysis Explicit time integration Initial equilibriumshape

Active structures integrated with wireless sensor and actuator networks： a bio-inspired control framework

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2016年第4期17卷 253-272页

作者： Peng-cheng yanG yan-bin shen Yao-zhi LUO Zhejiang Provincial Key Laboratory of Space Structures Zhejiang University Hangzhou 310058 China

One of the main problems in controlling the shape of active structures （AS） is to determine the actuations that drive the structure from the current state to the target state. Model-based methods such as stochastic search require a known type of load and relatively long computational time, which limits the practical use of AS in civil engineering. Moreover, additive errors may be produced because of the discrepancy between analytic models and real structures. To overcome these limitations, this paper presents a compound system called WAS, which combines AS with a wireless sensor and actuator network （WSAN）. A bio-inspired control framework imitating the activity of the nervous systems of animals is proposed for WAS. A typical example is tested for verification. In the example, a triangular tensegrity prism that aims to maintain its original height is integrated with a WSAN that consists of a central controller, three actuators, and three sensors. The result demonstrates the feasibility of the proposed concept and control framework in cases of unknown loads that include different types, distributions, magnitudes, and directions. The proposed control framework can also act as a supplementary means to improve the efficiency and accuracy of control frameworks based on a common stochastic search.

关键词： Active structures (AS) Wireless sensor and actuator networks (WSAN) Shape control Bio-inspired control

Static control method using gradient-genetic algorithm for grillage adaptive beam string structures based on minimal internal force

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2022年第9期23卷 721-732页

作者： yan-bin shen Hao-song SUN An-dong LEI Xiao-yuan YING Guang yanG Yao-zhi LUO College of Civil Engineering and Architecture Zhejiang UniversityHangzhou 310058China China State Construction Engineering(Hong Kong)Limited Hong Kong 999077China

The grillage adaptive beam string structure(GABSS)is a new type of smart structure that can self-adjust its deformation and internal forces through a group of active struts(actuators)in response to changes in environmental *** this paper,an internal force control method based on a gradient–genetic algorithm(GGA)is proposed for the static control of a tensioned structure(especially the GABSS).Specifically,an optimization model of the GABSS is established in which the adjustment values of the actuators are set as the control variables,and the internal force of the beam is set as the objective *** improved algorithm has the advantage of the global optimization ability of the genetic algorithm and the local search ability of the gradient *** examples are provided to illustrate the application of the GGA *** results show that the proposed method is practical for solving the internal force control problem of the GABSS.

关键词： Grillage adaptive beam string structure(GABSS) Gradient-genetic algorithm(GGA) Structural control Adaptive structure Actuator

Metal nanoparticles decorated CoFe-(oxy)hydroxysulfides nanosheets fabricated by a general strategy for electrocatalytic water splitting

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Journal of Energy Chemistry 2025年第1期100卷 26-38页

作者： Xiaodong yang Haochen shen Xiaoming Xiao Zhichao Li Qi Zhou Wei yang bin Jiang Yongli Sun Luhong Zhang Zhenhua yan School of Chemical Engineering and Technology Tianjin University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

This study presents a novel method to fabricate metal-decorated,sulfur-doped layered double hydroxides （M/SLDH） through spontaneous redox and sulfurization *** developed Ag/SLDH and Pt/SLDH catalysts with abundant heterogeneous interfaces and hierarchical nanostructures demonstrated outstanding oxygen evolution reaction （OER） and hydrogen evolution reaction （HER） performance,achieving low overpotentials of 212 and 35 mV at 10 mA cm-2in 1 M KOH,*** both anode and cathode in water splitting,they required only 1.47 V to reach 10 mA cm-2and exhibited high structural robustness,maintaining stability at 1000 mA cm-2for 300 ***-situ Raman analysis revealed that the synergistic effects of metal nanoparticles and S doping significantly promote the transformation into the S-Co1-xFexOOH layer,which serves as the active phase for water ***,ultraviolet photoelectron spectroscopy （UPS） and density functional theory （DFT） analyses indicated that incorporating metal nanoparticles and S doping increase electron density near the Fermi level and reduce reaction energy barriers,thus enhancing intrinsic OER and HER *** study provides a scalable strategy for synthesizing high-performance electrocatalysts for water splitting,with promising potential for broader applications.

关键词： LDH Spontaneous reaction Metal nanoparticles Water splitting

PKA reduces neuronal apoptosis by phosphorylation of Kv1.4

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PKA reduces neuronal apoptosis by phosphorylation of Kv1.4

华东六省一市生物化学与分子生物学会2003年学术交流会

作者： yan-mei TAO, Dong yan, bin shen, Rui ZENG, Yi-zheng WANG (Institute of Neuroscience, CAS 200031)

Neuronal apoptosis induced by serum deprivation or by staurosporine was associated with an early enhancementof potassium efflux and loss of total intracellular potassium. The apoptosis is reduced by TEA, a non-selective po-tassium channel blocker, or by elevated extracellular potassium. In our experiments, treatment of neurons with TEAor elevated extracellular potassium caused phosphorylation of Tl domain in Kv1. 4. Further, forskolin, the agonistof PKA, stimulated the same phosphorylation in the Tl domain. We found that the phosphorylation of Tl domain in

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煤储层孔隙度的协同模拟

煤炭学报 2007年第9期32卷 980-983页

作者：李少华张昌民胡爱梅陈东严申斌长江大学地球科学学院湖北荆州434023 北京中联煤层气有限公司北京100011

利用灰分与孔隙度具有较好相关性的特点,充分利用灰分提供的信息对孔隙度进行预测.同位协同克里金方法能够协同灰分数据进行孔隙度预测,且具有很高的运算效率.沁水盆地枣园试验区煤储层灰分与孔隙度具有较好的线性关系,在对孔隙度进行... 详细信息

利用灰分与孔隙度具有较好相关性的特点,充分利用灰分提供的信息对孔隙度进行预测.同位协同克里金方法能够协同灰分数据进行孔隙度预测,且具有很高的运算效率.沁水盆地枣园试验区煤储层灰分与孔隙度具有较好的线性关系,在对孔隙度进行预测的过程中,首先建立灰分产率的三维模型,然后采用同位协同克里金方法,以灰分产率为次变量对孔隙度进行模拟,建立三维孔隙度模型.并与未采用协同模拟的孔隙度模型进行了比较,结果表明:利用协同模拟方法能够充分利用灰分产率提供的信息,建立的孔隙度模型更好地反映了孔隙度的分布特征与非均质性.

关键词：煤层孔隙度协同模拟灰分枣园

Photoshop平面设计课程的创新教学法研究

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计算机时代 2016年第10期 87-89页

作者：颜彬沈宁江汉大学数学与计算机学院湖北武汉430056

对于Photoshop平面设计课程,为避免专注艺术而忽略技术,或者专注技术而陷入繁琐,提出将Photoshop作为强大的设计工具来实现平面设计创新。用技术专题的形式构造课程,每个专题对应指定的知识点,打造和专题相对应的教学方法和实验方案。... 详细信息

对于Photoshop平面设计课程,为避免专注艺术而忽略技术,或者专注技术而陷入繁琐,提出将Photoshop作为强大的设计工具来实现平面设计创新。用技术专题的形式构造课程,每个专题对应指定的知识点,打造和专题相对应的教学方法和实验方案。课堂上让学生跟随老师的演示,从基本知识点的学习和作品制作,过渡到有特色的作品创新。使学生将设计想法和技术手段有机结合,达到手随心动的创作境界。

关键词：平面设计 Photoshop 技术专题创新教学方法

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提高母猪生产效率:营养与健康

国外畜牧学（猪与禽） 2014年第S1期34卷 7-13页

作者：陈建康 Sung Woo Kim Alexandra C. Weaver yan bin shen yan Zhao

本综述主要研究能够满足猪胎儿生长发育、乳腺生长和泌乳需求的母猪营养需要和平衡。本文将讨论饲喂策略如何根据母猪的养分需要进行调节,以提高它们的生产效率和健康。本文所用的大部分研究数据是基于1996~2013年之间所进行的研究。母... 详细信息

本综述主要研究能够满足猪胎儿生长发育、乳腺生长和泌乳需求的母猪营养需要和平衡。本文将讨论饲喂策略如何根据母猪的养分需要进行调节,以提高它们的生产效率和健康。本文所用的大部分研究数据是基于1996~2013年之间所进行的研究。母猪的营养需要受母猪所处的妊娠阶段和胎次的影响。母猪日粮中的抗氧化剂浓度需要进行重新评估,以防止在妊娠后期和哺乳期出现极端的过氧化应激。在饲喂母猪时,考虑妊娠母猪的饲喂阶段和哺乳母猪的胎次,能提高母猪的生产寿命和健康状况。使用精选的营养成分和添加剂,似乎能帮助母猪提高生产力和改善健康状况。

关键词：初乳妊娠哺乳期母乳营养猪

Pathogenesis, diagnosis, and treatment of epilepsy: electromagnetic stimulation-mediated neuromodulation therapy and new technologies

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Neural Regeneration Research 2025年第4期20卷 917-935页

作者： Dian Jiao Lai Xu Zhen Gu Hua yan Dingding shen Xiaosong Gu Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjinChina Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province College of Pharmaceutical SciencesZhejiang UniversityHangzhouZhejiang ProvinceChina Affiliated Hospital of Nantong University NantongJiangsu ProvinceChina

Epilepsy is a severe,relapsing,and multifactorial neurological *** regarding the accurate diagnosis,prognosis,and in-depth pathogenesis are crucial for the precise and effective treatment of *** pathogenesis of epilepsy is complex and involves alterations in variables such as gene expression,protein expression,ion channel activity,energy metabolites,and gut microbiota *** results are lacking for conventional treatments for *** resection of lesions,drug therapy,and non-drug interventions are mainly used in clinical practice to treat pain associated with ***-pharmacological treatments,such as a ketogenic diet,gene therapy for nerve regeneration,and neural regulation,are currently areas of research *** review provides a comprehensive overview of the pathogenesis,diagnostic methods,and treatments of *** also elaborates on the theoretical basis,treatment modes,and effects of invasive nerve stimulation in neurotherapy,including percutaneous vagus nerve stimulation,deep brain electrical stimulation,repetitive nerve electrical stimulation,in addition to non-invasive transcranial magnetic stimulation and transcranial direct current *** studies have shown that electromagnetic stimulation-mediated neuromodulation therapy can markedly improve neurological function and reduce the frequency of epileptic ***,many new technologies for the diagnosis and treatment of epilepsy are being ***,current research is mainly focused on analyzing patients’clinical manifestations and exploring relevant diagnostic and treatment methods to study the pathogenesis at a molecular level,which has led to a lack of consensus regarding the mechanisms related to the disease.

关键词： diagnosis drug treatment electroencephalography epilepsy monitoring epilepsy nerve regeneration neurostimulation non-drug interventions pathogenesis prediction