检索结果-南通市图书馆

Hybrid Dynamic Variables-Dependent Event-Triggered Fuzzy Model Predictive Control

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 723-733页

作者： Xiongbo Wan Chaoling Zhang Fan wei Chuan-Ke Zhang min Wu IEEE the School of Automation China University of Geosciencesthe Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systemsand the Engineering Research Center of Intelligent Technology for Geo-ExplorationMinistry of EducationWuhan 430074China

This article focuses on dynamic event-triggered mechanism(DETM)-based model predictive control(MPC) for T-S fuzzy systems.A hybrid dynamic variables-dependent DETM is carefully devised,which includes a multiplicative dynamic variable and an additive dynamic *** addressed DETM-based fuzzy MPC issue is described as a “min-max” optimization problem(OP).To facilitate the co-design of the MPC controller and the weighting matrix of the DETM,an auxiliary OP is proposed based on a new Lyapunov function and a new robust positive invariant(RPI) set that contain the membership functions and the hybrid dynamic variables.A dynamic event-triggered fuzzy MPC algorithm is developed accordingly,whose recursive feasibility is analysed by employing the RPI *** the designed controller,the involved fuzzy system is ensured to be asymptotically *** examples show that the new DETM and DETM-based MPC algorithm have the advantages of reducing resource consumption while yielding the anticipated performance.

关键词： Dynamic event-triggered mechanism(DETM) hybrid dynamic variables model predictive control(MPC) robust positive invariant(RPI)set T-S fuzzy systems

Dual-channel mechano-phosphorescence:a combined locking effect with twisted molecular structures and robust interactions

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第4期13卷 738-746页

作者： Zongliang Xie Zhu mao Hailan Wang Yuxin Xiao Xiayu Zhang Tao Yu Zhongfu An wei Huang Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics&Xi’an Institute of Biomedical Materials and EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’an 710072China. Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518100China. Shenzhen Institutes of Advanced Electronic Materials Shenzhen 518100China. Key Laboratory of Flexible Electronics&Institute of Advanced Materials Nanjing Tech University30 South Puzhu RoadNanjing 211816China

Organic mechanoluminescence materials,featuring dual emission and ultralong phosphorescence characteristics,exhibit significant potential for applications in real-time stress sensing,pressure-sensitive lighting,advanced security marking techniques,and material breakage ***,due to immature molecular design strategies and unclear luminescence mechanisms,these materials remain rarely *** this study,we propose a valuable molecular design strategy to achieve dual-channel *** introducing the arylphosphine oxide group into a highly twisted molecular framework,enhanced intra-and intermolecular interactions could be achieved within rigid structures,leading to dual-channel mechanoluminescence with greatly promoted ultralong *** investigations reveal the substantial boosting effect of intra-and intermolecular interactions on mechanoluminescence and ultralong phosphorescence properties by locking the highly twisted molecular *** work provides a concise and guiding route to develop novel smart responsive luminescence materials for widespread applications in material science.

关键词： channel luminescence locking

Optical Sensor with Wide Range and High Sensitivity for Internal Magnetic Field Detection of Transformer

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2024年第5期10卷 2230-2244页

作者： Meng Huang wei Zheng Tong Ji mao Ji Tianjiao Pu Bo Qi State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Beijing Key Laboratory of High Voltage&EMC North China Electric Power UniversityBeijing 102206China China Electric Power Research Institute Beijing 100192China

The deterioration of winding defects is one of the important causes of power transformer fires and even explosion *** change of leakage magnetic field distribution is the most direct response to winding *** there are few sensors suitable for online measurement of the internal magnetic field of *** on the Faraday magneto-optical effect,a magnetic field sensor with wide range and high sensitivity is proposed in this paper,which is suitable for the interior use of *** straight-through optical structure with interior polarizer is adopted,and the sensor has a measurement range of 1.5 T and a sensitivity of 1 *** also possesses a small size,with a length of about 30 mm after *** influence mechanism of vibration and temperature is revealed through theoretical analysis and numerical *** is proposed to filter out the interference of vibration by characteristic frequency analysis and to compensate for temperature by a two-probe *** anti-interference test verifies the effectiveness of this method,and it can reduce the error from 80.56%to 2.63%under the combined interference of vibration and temperature.

关键词： Anti-interference Bessel function Faraday magneto-optical effect leakage magnetic field transformer two-probe structure

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

复杂电力网络的鲁棒性控制研究

计算机工程 2014年第4期40卷 291-294页

作者：毛为民中国南方电网有限责任公司广州供电局有限公司广州510620

复杂电力网络中存在的一些随机扰动可能带来大规模停电,给国民经济造成巨大损失。为此,根据复杂电力网络的非线性特性,设计一种新的非线性控制器,达到复杂电力网络的稳定控制目的。应用复杂网络控制理论,对电力网络的鲁棒控制进行研究,... 详细信息

复杂电力网络中存在的一些随机扰动可能带来大规模停电,给国民经济造成巨大损失。为此,根据复杂电力网络的非线性特性,设计一种新的非线性控制器,达到复杂电力网络的稳定控制目的。应用复杂网络控制理论,对电力网络的鲁棒控制进行研究,使用符号函数和绝对值函数设计一种新型的非线性反馈控制器,根据Lyapunov稳定性理论,证明该控制器能够有效地保证带有随机扰动的复杂电力网络的鲁棒控制。仿真实验采用Lorenz系统,结果表明,该网络结构满足无标度特性,在非线性控制器下能够有效地实现鲁棒同步。

关键词：复杂电力网络非线性控制鲁棒同步随机扰动稳定性安全性

在线全文

学校读者我要写书评

暂无评论

轧制和退火过程中等规聚丙烯的力学性能

高分子材料科学与工程 2008年第2期24卷 75-78页

作者：贾涓毛卫民 Dierk Raabe 北京科技大学材料科学与工程学院北京100083 马克思普朗克钢铁研究所杜塞尔多夫德国40237

借助拉伸试验对轧制和退火后的等规聚丙烯进行了轧向及横向上力学性能的研究。结果发现,结晶度和大分子链的取向是影响材料力学性能的主要原因,力学性能的变化主要发生在轧制过程中。轧制后,大分子链沿轧向排列,出现各向异性:轧向上拥... 详细信息

借助拉伸试验对轧制和退火后的等规聚丙烯进行了轧向及横向上力学性能的研究。结果发现,结晶度和大分子链的取向是影响材料力学性能的主要原因,力学性能的变化主要发生在轧制过程中。轧制后,大分子链沿轧向排列,出现各向异性:轧向上拥有高的拉伸强度和低的延伸率。结晶度的变化主要是影响材料的弹性模量和横向上的屈服强度。退火后,大分子链的取向发生较小的变化。非晶部分的再晶化与无序化共同影响材料的性能,在伸拉强度没有减少的基础上增大了材料轧向上的延伸率。

关键词：等规聚丙烯力学性能轧制退火

Photocatalytic minisci-type multicomponent reaction for the synthesis of 1-(halo)alkyl-3-heteroaryl bicyclo[1.1.1] pentanes

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第10期35卷 6-8页

作者： Rong-Nan Yi wei-min He Key Laboratory of Food&Environment&Drug Monitoring and Testing of Universities in Hunan Province Hunan Police Academy.Changsha 410138China School of Chemistry and Chemical Engineering University of South ChinaHengyang 421001China

Bioisosteres play an important role in pharmaceutical and agricultural compound design that has been developed to enhance the properties of *** a sp3-rich small ring cage hydrocarbons,bicyclo[1.1.1]pentanes(BCPs)were commonly considered as a bioisostere of the para-substituted arenes,internal alkynes,and tert-butyl groups,and its introduction can significantly improve pharmacokinetic properties,including passive permeability,aqueous solubility,metabolic stability[1].Over the past decades,numerous pharmaceutically relevant molecules with biaryl frameworks were improved by the approach of bioisosteric *** strategies for the synthesis of such BCP-aryls derivatives mostly depend on the stepwise C-C formation via the direct addition to bridgehead C-C bond of[1.1.1]propellane to provide active BCP-intermediates and followed by a second transitionmetal cross-coupling ***,these pioneer works were limited by the low step economy,the use of unstable reagents,and harsh conditions in industrial productions.

关键词： synthesis substituted alkyl

Software Defect Prediction Method Based on Stable Learning

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第1期78卷 65-84页

作者： Xin Fan Jingen mao Liangjue Lian Li Yu wei Zheng Yun Ge College of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing210012China School of Software Nanchang Hangkong UniversityNanchang330029China Software Testing and Evaluation Center Nanchang Hangkong UniversityNanchang330029China

The purpose of software defect prediction is to identify defect-prone code modules to assist software quality assurance teams with the appropriate allocation of resources and *** previous software defect prediction studies,transfer learning was effective in solving the problem of inconsistent project data ***,target projects often lack sufficient data,which affects the performance of the transfer learning *** addition,the presence of uncorrelated features between projects can decrease the prediction accuracy of the transfer learning *** address these problems,this article propose a software defect prediction method based on stable learning(SDP-SL)that combines code visualization techniques and residual *** method first transforms code files into code images using code visualization techniques and then constructs a defect prediction model based on these code *** the model training process,target project data are not required as prior *** the principles of stable learning,this paper dynamically adjusted the weights of source project samples to eliminate dependencies between features,thereby capturing the“invariance mechanism”within the *** approach explores the genuine relationship between code defect features and labels,thereby enhancing defect prediction *** evaluate the performance of SDP-SL,this article conducted comparative experiments on 10 open-source projects in the PROMISE *** experimental results demonstrated that in terms of the F-measure,the proposed SDP-SL method outperformed other within-project defect prediction methods by 2.11%-44.03%.In cross-project defect prediction,the SDP-SL method provided an improvement of 5.89%-25.46% in prediction performance compared to other cross-project defect prediction ***,SDP-SL can effectively enhance within-and cross-project defect predictions.

关键词： Software defect prediction code visualization stable learning sample reweight residual network

Synergy of sodium doping and nitrogen defects in carbon nitride for promoted photocatalytic synthesis of hydrogen peroxide

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第8期35卷 324-329页

作者： Fabrice Nelly Habarugira Ducheng Yao wei Miao Chengcheng Chu Zhong Chen Shun mao College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai 200092China Baowu Water Technology Co. Ltd.Research InstituteShanghai 201999China

Photocatalytic synthesis of hydrogen peroxide has gradually become a promising method for in-situ pro-duction of hydrogen peroxide,which relies on sustainable solar ***,the commonly used photocatalyst,i.e.,carbon nitride(CN),still suffers from the drawbacks of narrow light absorption range and fast charge ***,we report a facile method to introduce nitrogen defects into carbon nitride together with sodium *** adjusting the ratio of sodium dicyandiamide,the band gap of carbon nitride can be controlled,while the carrier separation and transfer ability of carbon nitride is *** modified CN with sodium doping and nitrogen defect(SD-CN)demonstrates outstanding H_(2)O_(2)pro-duction performance(H_(2)O_(2)yield rate of 297.2μmol L^(−1)h^(−1))under visible light irradiation,which is approximately 9.8 times higher than that of pristine *** work deepens the understanding of the coordinated effect of structural defect and element doping of carbon nitride on the photocatalytic H_(2)O_(2)production performance,and provides new insight into the design of photocatalytic system for efficient production of H_(2)O_(2).

关键词： Photocatalysis H_(2)O_(2)evolution Sodium doping Nitrogen defect Metal-free catalyst

New insight into Ca^(2+)-permeable channel in plant immunity

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第3期66卷 623-631页

作者： wei Wang Hang-Yuan Cheng Jian-min Zhou State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China Hainan Yazhou Bay Seed Laboratory Sanya 572025China

Calcium ions(Ca^(2+)) are crucial intracellular second messengers in eukaryotic cells. Upon pathogen perception, plants generate a transient and rapid increase in cytoplasmic Ca^(2+)levels, which is subsequently decoded by Ca^(2+)sensors and effectors to activate downstream immune responses. The elevation of cytosolic Ca^(2+)is commonly attributed to Ca^(2+)influx mediated by plasma membranelocalized Ca^(2+)–permeable channels. However, the contribution of Ca^(2+)release triggered by intracellular Ca^(2+)-permeable channels in shaping Ca^(2+)signaling associated with plant immunity remains poorly understood. This review discusses recent advances in understanding the mechanism underlying the shaping of Ca^(2+)signatures upon the activation of immune receptors, with particular emphasis on the identification of intracellular immune receptors as non-canonical Ca^(2+)-permeable channels. We also discuss the involvement of Ca^(2+)release from the endoplasmic reticulum in generating Ca^(2+)signaling during plant immunity.

关键词： Ca^(2+)-permeable channels endoplasmic reticulum phosphorylation plant immunity resistosome