检索结果-南通市图书馆

Motion Coordination for a Class of Multi-Agents via Networked Predictive Control

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2020年第3期33卷 622-639页

作者： zhang tian-yong YOU Bo LIU Guo-Ping School of Automation Harbin University of Science and TechnologyHarbin 150080China School of Engineering University of South WalesPontypriddCF371DLUK The CTGT Center School of AstronauticsHarbin Institute of TechnologyHarbin 150001China

The motion coordination formation control problem for a class of non-linear system is considered in this paper,where networked induced time-delays exist in the feedback channel of each agent and in communication channels between *** a foundation work,a coordination formation controller in discrete-time domain that without time-delay is provided *** on the above results,a motion coordination predictive formation control strategy as well as its detail implementation processes are proposed to actively compensate the *** analysis and simulation results are provided to demonstrate the feasibility and effectiveness of the proposed predictive strategy.

关键词： Formation control motion coordination networked predictive control time-delays wheeled mobile robots

Calculation and Analysis of Internal Force in Arch Structure of Frozen Soil

在线全文

学校读者我要写书评

暂无评论

Journal of China University of Mining and Technology 2005年第4期15卷 279-282页

作者： YUE Feng-tian zhang yong SHI Rong-jian School of Architecture and Civil Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Aimed at the frozen soil arch reinforcement form of upside shed used for the shield machine launching in tunneling the internal force of the structure was calculated with the aid of the structural mechanics theory. Considering the space characteristics of the structure, this calculating method is suitable for practical engineering. Moreover, the behavior of the freezing arch reinforcement structure was analyzed combined with an engineering case.

关键词： shield machine launching freezing reinforcement arch structure internal force

The expression of Usp26 gene in mouse testis and brain

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2009年第4期11卷 748-749页

作者： Jie zhang Hong tian yong-Wei Huo Dang-Xia Zhou Hai-Xu Wang Li-Rong Wang Qiu-Yang zhang Shu-Dong Qiu Department of Anatomy Histology & Embryology Medical College of Xi’an Jiaotong University Xi’an 710061 China Department of Anatomy Histology & Embryology Medical College of Xi’an Jiaotong University Xi’an 710061 China Research Center of Reproductive Medicine Medical College of Xi’an Jiaotong University Xi’an 710061 China Department of Anatomy Histology & Embryology Medical College of Xi’an Jiaotong University Xi’an 710061 China Research Center of Reproductive Medicine Medical College of Xi’an Jiaotong University Xi’an 710061 China Department of Pathology Medical College of Xi’an Jiaotong University Xi’an 710061 China Department of Anatomy Histology & Embryology Medical College of Xi’an Jiaotong University Xi’an 710061 China Department of Anatomy Histology & Embryology Medical College of Xi’an Jiaotong University Xi’an 710061 China Research Center of Reproductive Medicine Medical College of Xi’an Jiaotong University Xi’an 710061 China Department of Anatomy Histology & Embryology Medical College of Xi’an Jiaotong University Xi’an 710061 China Research Center of Reproductive Medicine Medical College of Xi’an Jiaotong University Xi’an 710061 China Department of Anatomy Histology & Embryology Medical College of Xi’an Jiaotong University Xi’an 710061 China Research Center of Reproductive Medicine Medical College of Xi’an Jiaotong University Xi’an 710061 China

In this article, published on 1 July 2009, the following colored figures were wrongly published in black and white Asian Journal of Andrology would like to apologize to the authors and readers for the error and any c... 详细信息

关键词： ubiquitin-specific protease 26 (USP26) Usp26 gene deubiquitination enzymes protein degradation spermatogenesis mouse

Merging polymers of intrinsic microporosity and porous carbon-based zinc oxide composites in novel mixed matrix membranes for efficient gas separation

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2025年第1期10卷 203-213页

作者： Muning Chen Jiemei Zhou Jing Ma Weigang Zheng Guanying Dong Xin Li Zhihong tian Yatao zhang Jing Wang yong Wang School of Chemical Engineering Zhengzhou UniversityZhengzhou450001HenanChina State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemical Engineering Nanjing Tech UniversityNanjing211816JiangsuChina Singapore Membrane Technology Centre Nanyang Environment and Water Research InstituteNanyang Technological UniversitySingapore637141Singapore Engineering Research Center for Nanomaterials Henan UniversityKaifeng475004HenanChina State Key Laboratory of Coking Coal Resources Green Exploitation Zhengzhou UniversityZhengzhou 450001China School of Energy and Environment Southeast UniversityNanjing210096JiangsuChina

Mixed matrix membranes(MMMs)have demonstrated significant promise in energy-intensive gas separations by amalgamating the unique properties of fillers with the facile processability of ***,achieving a simultaneous enhancement of permeability and selectivity remains a formidable challenge,due to the difficulty of achieving an optimal match between polymers and *** this study,we incorporate a porous carbon-based zinc oxide composite(C@ZnO)into high-permeability polymers of intrinsic microporosity(PIMs)to fabricate *** dipole–dipole interaction between C@ZnO and PIMs ensures their exceptional compatibility,mitigating the formation of non-selective voids in the resulting ***,C@ZnO with abundant interconnected pores can provide additional low-resistance pathways for gas transport in *** a result,the CO_(2) permeability of the optimized C@ZnO/PIM-1 MMMs is elevated to 13,215 barrer,while the CO_(2)/N_(2) and CO_(2)/CH_(4) selectivity reached 21.5 and 14.4,respectively,substantially surpassing the 2008 Robeson upper ***,molecular simulation results further corroborate that the augmented membrane gas selectivity is attributed to the superior CO_(2) affinity of C@*** summary,we believe that this work not only expands the application of MMMs for gas separation but also heralds a paradigm shift in the application of porous carbon materials.

关键词： Mixed matrix membranes Polymers of intrinsic microporosity CO_(2)separation Porous carbon materials

Aluminum foam as buffer layer used in soft rock tunnel with large deformation

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2025年第1期22卷 324-336页

作者： WU Faquan MIAO Binxin tian Yun zhang Fang zhang Chaoxuan School of Civil Engineering Shaoxing UniversityShaoxing 312000China Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province Shaoxing 312000China School of Civil Engineering and Architecture Taizhou UniversityTaizhou 318000China

The squeezing deformation of surrounding rock is an important factor restricting the safe construction and long-term operation of tunnels when a tunnel passes through soft strata with high ground *** such soft rock geological conditions,the large deformation of the surrounding rock can easily lead to the failure of supporting structures,including shotcrete cracks,spalling,and steel arch *** improve the lining support performance during the large deformation of squeezed surrounding rock,this work selects aluminum foam with densities of 0.25 g/cm3,0.42 g/cm3 and 0.61 g/cm3 as the buffer layer material and carries out uniaxial confined compression *** the evaluation and analysis of energy absorption and the comparison of the yield pressure of aluminum foam with those of other cushioning materials and yield pressure support systems,the strength,deformation and energy absorption of aluminum foam with a density of 0.25 g/cm3 meet the yield pressure performance *** numerical model of the buffer layer yielding support system is then established via the finite element analysis software ABAQUS,and the influence of the buffer layer setting on the lining support is *** with the conventional support scheme,the addition of an aluminum foam buffer layer can reduce the stress and deformation of the primary support and secondary *** maximum and minimum principal stresses of the primary support are reduced by 13%and 15%,*** maximum and minimum principal stresses of the secondary lining are reduced by 15%and 12%,respectively,and the displacement deformation of the secondary lining position is reduced by 15%.In summary,the application of aluminum foam buffer layer can reduce the stress and deformation of the primary support and secondary lining,improve the stress safety of the support and reduce the deformation of the support.

关键词： Soft rock tunnel Uniaxial confined compression Aluminum foam Buffer layer Yielding support

Adaptive VDI Session Placement via User Logoff Prediction

在线全文

学校读者我要写书评

暂无评论

Machine Intelligence Research 2025年第1期22卷 189-200页

作者： Wenping Fan Puhui Meng Yu tian Min-Ling zhang Yao zhang School of Computer Science and Engineering Southeast UniversityNanjing210096China VMware Information Technology(China)Limited Beijing100190China Key Laboratory of Computer Network and Information Integration(Southeast University) Ministry of EducationNanjing210096China

After the global pandemic,DaaS(desktop as a service)has become the first choice of many companies’remote working *** the desktops are usually deployed in the public cloud when using DaaS,customers are more cost-sensitive which boosts the requirement of proactive power *** researches in this area focus on virtual desktop infrastructure(VDI)session logon behavior modeling,but for the remote desktop service host(RDSH)-shared desktop pools,logoff optimization is also *** systems place sessions by round-robin or in a pre-defined order without considering their logoff ***,these approaches usually suffer from the situation that few left sessions prevent RDSH servers from being powered-off which introduces cost *** this paper,we propose session placement via adaptive user logoff prediction(SODA),an innovative compound model towards proactive RDSH session ***,an ensemble machine learning model that can predict session logoff time is combined with a statistical session placement bucket model to place RDSH sessions with similar logoff time in a more centralized manner on RDSH ***,the infrastructure cost-saving can be improved by reducing the resource waste introduced by those RDSH hosts with very few hanging sessions left for a long *** on real RDSH pool data demonstrate the effectiveness of the proposed proactive session placement approach against existing static placement techniques.

关键词： Virtual desktop infrastructure(VDI)resource management remote desktop service logoff prediction adaptive modeling session placement

Single-atom“surgery”on chiral all-dialkynyl-protected superatomic silver nanoclusters

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 Bulletin 2025年第3期70卷 365-372页

作者： Chengkai zhang Wei-Dan Si Wei-Dong tian Wan-Jun Xiao Zhi-yong Gao Zhi Wang Chen-Ho Tung Di Sun School of Chemistry and Chemical Engineering State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

The manipulation of single atom within the metallic kernel of nanoclusters has attracted considerable attention due to its potentials to elucidate kernel-based structure-property relationships at the single-atom ***,new-designed chiral bialkynyl ligands,have been chosen as protective agents to isolate two pairs of 8-electron superatomic silver nanoclusters,R/S-Ag39 and R/S-Ag40.X-ray diffraction analysis reveals that Ag39 and Ag40 with the same number of chiral ligands,possess a closely analogous silver skeleton but a single-atomic *** incorporation of an extra Ag40th atom into Ag40 evokes two significant changes of structure and property compared to Ag39:(i)a reduction in the symmetry of the entire nanocluster,resulting in an enhancement of kernel-related asymmetry g-factor;(ii)a regulation of the transitions(1P→1D and Ligand(π)→1D)of excited state,leading to a second near-infrared(NIR-II,1000-1700 nm)phosphorescent emission red-shift from 1088 to 1150 *** work not only provides vital insights into the relationship between structures and ground/excited states chiroptical activities at the single-atom level,but also presents bialkynyl as a promising stabilizing agent for building superatomic metal nanoclusters.

关键词： Single atom manipulation Chiral bialkynyl ligands Superatomic silver nanoclusters NIR-Il phosphorescence

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于神经网络预测与模糊度量的再融合诊断

计算机工程 2011年第8期37卷 222-224页

作者：张勇张天永重庆工商大学机械工程学院重庆400067

通过分析神经网络理论和模糊度量方法的特点,提出基于神经网络预测和模糊度量方法的故障再融合诊断方法。该方法采用多个观测数据及主客观相结合的诊断方法,实现方法间的互补融合诊断,更全面、客观地辨识故障,提高故障定位能力,并给出... 详细信息

通过分析神经网络理论和模糊度量方法的特点,提出基于神经网络预测和模糊度量方法的故障再融合诊断方法。该方法采用多个观测数据及主客观相结合的诊断方法,实现方法间的互补融合诊断,更全面、客观地辨识故障,提高故障定位能力,并给出一个液压设备故障诊断实例验证了该方法的有效性。

关键词：神经网络预测模糊度量 D—S证据理论再融合诊断隶属度函数

Modeling and Capacity Configuration Optimization of CRH5 EMU On-Board Energy Storage System

在线全文

学校读者我要写书评

暂无评论

Energy Engineering 2025年第1期122卷 307-329页

作者： Mingxing tian Weiyuan zhang Zhaoxu Su School of Automation and Electrical Engineering Lanzhou Jiaotong UniversityLanzhou730070China

In the context of the“dual carbon”goals,to address issues such as high energy consumption,high costs,and low power quality in the rapid development of electrified railways,this study focused on the China Railways High-Speed 5 Electric Multiple Unit and proposed a mathematical model and capacity optimization method for an onboard energy storage system using lithium batteries and supercapacitors as storage ***,considering the electrical characteristics,weight,and volume of the storage media,a mathematical model of the energy storage system was ***,to tackle problems related to energy consumption and power quality,an energy management strategy was proposed that comprehensively considers peak shaving and valley filling and power quality by controlling the charge/discharge thresholds of the storage *** optimization adopted a bilevel programming model,with the series/parallel number of storage modules as variables,considering constraints imposed by the Direct Current to Direct Current converter,train load,and *** improved Particle Swarm Optimization algorithm and linear programming solver were used to solve specific *** results show that the proposed onboard energy storage system can effectively achieve energy savings,reduce consumption,and improve power qualitywhile meeting the load and space limitations of the train.

关键词： Electrified railway regenerative braking bi-level programming on-board energy storage power quality capacity configuration