检索结果-南通市图书馆

International Journal of Automation and computing 2014年第3期11卷 334-339页

作者： wen-lei li Ming-Ming li School of Information Science and Engineering Ningbo University

In view of single machine to infinite bus system with static synchronous compensator, which is affected by internal and external disturbances, a nonlinear adaptive robust controller is constructed based on the improved dynamic surface control method(IDSC). Compared with the conventional DSC, the sliding mode control is introduced to the dynamic surface design procedure, and the parameter update laws are designed using the uncertainty equivalence criterions. The IDSC method not only reduces the complexity of the controller but also greatly improves the system robustness, speed and accuracy. The derived controller cannot only attenuate the influences of external disturbances against system output, but also has strong robustness to system parameters variance because the damping coefficient is considered in the internal parameter uncertainty. Simulation result reveals that the designed controller can effectively improve the dynamic performances of the power system.

关键词： Power systems robust control parameter uncertainty disturbance attenuation dynamic surface control(DSC)

Global optimization of process parameters for low-temperature SiN_(x) based on orthogonal experiments

在线全文

学校读者我要写书评

暂无评论

Advances in Manufacturing 2023年第2期11卷 181-190页

作者： lian-Qiao Yang Chi Zhang wen-lei li Guo-He liu Jia-Qi Wu-Ma Jin-Qiang liu Jian-Hua Zhang School of Materials Science and Engineering Shanghai UniversityShanghai200444People's Republic of China Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai UniversityShanghai200072People's Republic of China Huawei Technologies Co. LtdShanghai200120People's Republic of China

Low-temperature silicon nitride(SiNx)films deposited by plasma-enhanced chemical vapor deposition(PECVD)have huge application potential in the flexible ***,the applicability of SiNx largely depends on the film’s general properties,including flexibility,deposition rate,residual stress,elastic modulus,fracture strain,dielectric constant,refraction index,*** optimization towards specific application by conventional experiment design needs lots of work due to the interaction of muti quality and process ***,an efficient global optimization approach for the process technology was proposed based on the Taguchi orthogonal experiment method considering muti-factor *** of all,the Taguchi orthogonal experiment design and analysis was used to rank the influences of main process parameters on the quality characteristics,including radio frequency(RF)power,pressure,silane flow rate,ammonia flow rate and nitrogen flow ***,the global optimization approach was carried out utilizing the multi-response optimizer considering the combination target of film formation rate,residual stress,dielectric constant,elastic modulus,fracture strain,refractive ***,the optimal solution of the SiNx film was finally obtained and verified.

关键词： Plasma-enhanced chemical vapor deposition(PECVD) Low-temperature silicon nitride(SiNx) Flexible display Taguchi orthogonal experiment Process optimization

Study and application of the influence of inclination angle on the cross-fusion mechanism of high gas thick coal seam

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

International Journal of Mining Science and Technology 2025年第1期35卷 69-85页

作者： Pengxiang Zhao Zechen Chang Shugang li Risheng Zhuo Yongyong Jia Qiudong Shao wen lei College of Safety Science and Engineering Xi'an University of Science and TechnologyXi’an 710054China Western Mining Gas Intelligent Extraction Engineering Research Centre Xi’an 710054China Xinjiang Coal and Coalbed Methane Engineering Technology Research Centre Urumqi 830091China Xinjiang Key Laboratory of Coal Mine Disaster Intelligent Prevention and Emergency Response Xinjiang Institute of EngineeringUrumqi 830023China Xinjiang Uygur Autonomous Region Coal Science Research Institute Urumqi 830091China Xinjiang Changji Heze Tengda Mining Co. Ltd.Changji 831100China

In this study,to better decide the effect of coal seam dip angle upon the dynamic change of the crossfusion in gas transport and storage areas during the progress of working face in the high gas thick coal seam,a two-dimensional physical simulation experiment regarded as the theoretical research was conducted to properly explore the variation law of overburden *** results demonstrated that the boundary of the gas transport zone was located in the region of fracture *** boundary of the gas storage area was located in the abrupt penetration ***,according to the information theory,the state of the gas transport and storage areas was determined by the changing trend of the fracture rate and fracture *** mathematical representation model of the dip effect in gas transport and storage areas was *** criteria upon which the regional location of the gas transport area and gas storage area can be based were put *** cross-fusion evolution process of the dip effect in gas transport and storage areas was revealed as *** research results could provide guidance for realising directional and accurate gas extraction.

关键词： Coal seam dip angle Cross fusion High gas thick coal seam Overburden fracture Gas transport and storage areas

Construction and Co-expression of Bicistronic Plasmid Encoding Human WEE1 and Stem Cell Factor

在线全文

学校读者我要写书评

暂无评论

Acta Biochimica et Biophysica Sinica 2005年第2期37卷 107-112页

作者： Ping lei wen-Han li wen-Jun liAO Bing YU Hui-Fen ZHU Jing-Fang SHAO Guan-Xin SHEN Laboratory of Molecular and Immuno-Pharmacology,Department of Immunology and Department of Pharmacology,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China Laboratory of Molecular and Immuno-Pharmacology Department of Immunology and Department of Pharmacology Tongji Medical College Huazhong University of Science and TechnologyWuhan 430030 China

To protect the hematopoietic stem cells(HSCs)from apoptosis induced by chemotherapy andpromote HSC proliferation,bi-functional gene delivery systems are increasingly investigated in gene *** the present study,we constructed a bicistronic vector,pWISG,expressing the anti-apoptotic proteinhuman WEE1(WEE1Hu)and the fusion protein of the proliferation-stimulating stem cell factor(SCF)andenhanced green fluorescent protein(EGFP)separately with internal ribosome entry site(IRES).We firstexamined

关键词： internal ribosome entry site (IRES) human WEE1 (WEE1Hu) stem cell factor (SCF)

Factor-adjusted tests for generalized linear models with multimodal data:An application to breast cancer data

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2025年第2期68卷 447-484页

作者： Dongyu li lei Wang School of Statistics and Data Science KLMDASRLEBPSand LPMCNankai UniversityTianjin 300071China

With the advancement of modern scientific research,multimodal data is increasingly being collected from multiple sources or *** outcomes derived from generalized linear models with high-dimensional and multimodal covariates,we develop two distinct factor-adjusted tests to assess the significance of high-dimensional modality data and specific low-dimensional linear combinations of predictors from one or more modalities,***,we propose a factor-adjusted decorrelated score test to evaluate the significance of a single *** approach simultaneously transforms a high-dimensional test into a fixed low-dimensional one while addressing the impact of high-dimensional nuisance ***,we construct a factor-adjusted Wald test based on partial penalized estimation to assess the significance of certain low-dimensional combinations of variables from one or more *** limiting distributions of these two proposed tests are analyzed under both the null hypothesis and local alternatives to characterize the asymptotic type-I errors and *** finite sample performance of our proposed tests is evaluated through simulations and further demonstrated with a breast cancer dataset.

关键词： decorrelated score factor model high-dimensional data integrative analysis partial penalized Wald test

Prediction of microstructure evolution of ZK61 alloy during hot spinning by internal state variable model

在线全文

学校读者我要写书评

暂无评论

中国有色金属学报 2025年第1期35卷 126-142页

作者： Jin-qi PAN wen-cong ZHANG Jian-lei YANG Song-hui WANG Yong WU Huan li School of Materials Science and Engineering Harbin Institute of Technology WeihaiWeihai 264209China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

An internal state variable(ISV)model was established according to the experimental results of hot plane strain compression(PSC)to predict the microstructure evolution during hot spinning of ZK61 *** effects of the internal variables were considered in this ISV model,and the parameters were optimized by genetic *** validation,the ISV model was used to simulate the evolution of grain size(GS)and dynamic recrystallization(DRX)fraction during hot spinning via Abaqus and its subroutine *** comparing the simulated results with the experimental results,the application of the ISV model was proven to be ***,the strength of the thin-walled spun ZK61 tube increased from 303 to 334 MPa due to grain refinement by DRX and texture ***,some ultrafine grains(0.5μm)that played an important role in mechanical properties were formed due to the proliferation,movement,and entanglement of dislocations during the spinning process.

关键词： internal state variable model hot spinning ZK61 alloy finite element simulation texture evolution

Thermoresponsive helical dendronized poly(arylacetylene)s:modulating the dynamic chirality

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

Science China Chemistry 2025年

作者： Xueting Lu lei Wang liangxuan Ren wen li Afang Zhang International Joint Laboratory of Biomimetic&Smart Polymers School of Materials Science and EngineeringShanghai University

Helical poly(arylacetylene)s have formed an intriguing class of polymers,whose chiralities are dynamic and liable to external *** combining dendronized polymer topology with dendritic oligoethylene glycols (OEGs),we here report on synthesis of a homologous series of thermoresponsive dendronized poly(arylacetylene)s with either poly(phenyl acetylene) or poly(naphthalene acetylene) as the backbones,and investigate tunability of their helical *** polymers carry dendritic OEG pendants with either methoxyl-or ethoxyl-terminals to tune their unprecedent thermoresponsive behaviors,and at the same time,dendritic shielding plays an important role in mediating their thermal phase transition *** of these polymers is originated from the chiral alanine or phenylalanine moieties within the dendritic pendants,which can be tailored through manipulating solvation in different organic solvents or via thermal dehydration and collapse in ***,achiral additives such as linear or dendritic OEGs and benzene derivatives can act similarly as thermal dehydration to induce chirality transitions of these polymers in aqueous phase through interplay competitions between the additives and the polymers against their hydration.

关键词：

The potential mechanism and clinical application value of remote ischemic conditioning in stroke

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第6期20卷 1613-1627页

作者： Yajun Zhu Xiaoguo li Xingwei lei liuyang Tang Daochen wen Bo Zeng Xiaofeng Zhang Zichao Huang Zongduo Guo The First Affiliated Hospital of Chongqing Medical University ChongqingChina

Some studies have confirmed the neuroprotective effect of remote ischemic conditioning against stroke. Although numerous animal researches have shown that the neuroprotective effect of remote ischemic conditioning may be related to neuroinflammation, cellular immunity, apoptosis, and autophagy, the exact underlying molecular mechanisms are unclear. This review summarizes the current status of different types of remote ischemic conditioning methods in animal and clinical studies and analyzes their commonalities and differences in neuroprotective mechanisms and signaling pathways. Remote ischemic conditioning has emerged as a potential therapeutic approach for improving stroke-induced brain injury owing to its simplicity, non-invasiveness, safety, and patient tolerability. Different forms of remote ischemic conditioning exhibit distinct intervention patterns, timing, and application range. Mechanistically, remote ischemic conditioning can exert neuroprotective effects by activating the Notch1/phosphatidylinositol 3-kinase/Akt signaling pathway, improving cerebral perfusion, suppressing neuroinflammation, inhibiting cell apoptosis, activating autophagy, and promoting neural regeneration. While remote ischemic conditioning has shown potential in improving stroke outcomes, its full clinical translation has not yet been achieved.

关键词： Akt apoptosis autophagy cerebral perfusion cerebral vascular stenosis clinical transformation hemorrhagic stroke ischemic stroke neuroinflammation neuroprotection Notch1 PI3K remote ischemic conditioning stroke

Mechanism of cryorolling and aging treatment for enhancing corrosion properties of 2195 Al−li alloy

在线全文

学校读者我要写书评

暂无评论

中国有色金属学报 2025年第1期35卷 13-29页

作者： Yue XIAO wen-shuai WANG Waqas FARID li-hua ZHANG Charlie KONG Hai-liang YU State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South UniversityChangsha 410083China light Alloy Research Institute Central South UniversityChangsha 410083China Mark Wainwright Analytical Centre University of New South WalesSydneyNSW 2052Australia

The impact of cryorolling(CR)and room temperature rolling(RTR)followed by artificial aging on the corrosion characteristics of 2195 Al−li alloy(AA2195)was *** electron microscope,scanning electron microscope,optical microscope,intergranular corrosion experiment,and electrochemical experiment were *** different stages of aging treatment,the corrosion behavior of both CR and RTR samples exhibited a sequential progression of pitting corrosion,followed by intergranular corrosion,and then pitting corrosion *** corrosion rates of both samples initially showed an increase,followed by a gradual stabilization over *** size and density of T1 phase significantly influenced the corrosion performance of the *** the peak aging and over-aging stages,the CR sample exhibited superior corrosion resistance to the RTR sample,attributed to its finer T1 phase.

关键词： 2195 Al−li alloy cryorolling aging treatment corrosion performance

An efficient quantum proactive incremental learning algorithm

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

Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 45-53页

作者： lingxiao li Jing li Yanqi Song Sujuan Qin Qiaoyan wen Fei Gao State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China School of Cyberspace Security Beijing University of Posts and TelecommunicationsBeijing 100876China

In scenarios where a large amount of data needs to be learned,incremental learning can make full use of old knowledge,signif-icantly reduce the computational cost of the overall learning process,and maintain high *** this paper,taking the MaxCut problem as our example,we introduce the idea of incremental learning into quantum computing,and propose a Quantum Proactive Incremental Learning algorithm(QPIL).Instead of a one-off training of quantum circuit,QPIL contains a multi-phase training on gradually-increased subgraphs of all vertices,proactively reducing large-scale problems to smaller ones to solve in steps,providing an efficient solution for ***,some vertices and corresponding edges are randomly selected for training to obtain optimized parameters of the quantum circuit at ***,in each incremental phase,the remaining vertices and corresponding edges are gradually added and the parameters obtained from the previous phase are reused in the parameter initialization of the current *** perform experiments on 120 different small-scale graphs,and it shows that QPIL performs superior to prevalent quantum and classical baselines in terms of approximation ratio(AR),time cost,anti-forgetting,and solv-ing *** particular,QPIL’s AR surpasses 20%of mainstream quantum baselines,and the time cost is less than 1/5 of *** idea of QPIL is expected to inspire efficient and high-quality solutions in large-scale MaxCut and other combinatorial optimization problems.

关键词： variational quantum algorithm incremental learning multi-phase training MaxCut quantum computing