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Integrated guidance and control design for missile with terminal impact angle constraint based on sliding mode control

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Journal of Systems Engineering and Electronics 2010年第4期21卷 623-628页

作者： peng wu Ming Yang Control and Simulation Center Harbin Institute of Technology Harbin 150001 E R. China

Aimed at the guidance requirements of some missiles which attack targets with terminal impact angle at the terminal point,a new integrated guidance and control design scheme based on variable structure control approach for missile with terminal impact angle constraint is ***,a mathematical model of an integrated guidance and control model in pitch plane is established,and then nonlinear transformation is employed to transform the mathematical model into a standard form suitable for sliding mode control method design.A sufficient condition for the existence of linear sliding surface is given in terms of linear matrix inequalities（LMIs）,based on which the corresponding reaching motion controller is also *** verify the effectiveness of the proposed integrated design scheme,the numerical simulation of missile is *** simulation results demonstrate that the proposed guidance and control law can guide missile to hit the target with desired impact angle and desired flight attitude angle simultaneously.

关键词： guidance terminal impact angle sliding mode control integrated guidance and control linear matrix inequality(LMI).

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New progress in zeolite synthesis and catalysis

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National Science Review 2022年第9期9卷 102-119页

作者： Hao Xu peng wu Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University

The rational design synthesis of zeolite catalysts with effective,environmentally benign and atom-economic routes is a major topic in the field of microporous materials,as it would avoid the high labor cost and inefficiency of traditional trial-and-error methods in developing new structures and dispel environmental concerns regarding the industrial mass production of *** applications of zeolite materials have expanded from conventional single functionalities,such as solid acids or selective oxidation catalysts to bi/multifunctionalities through combination with metals or metal *** is a response to new re quirements from petro chemical and fine chemical industries,such as precise control of product distribution,conversion of low-carbon resources for chemical production,and solutions to increasingly severe environmental problems related to CO2and ***,based on the systematic knowledge of zeolite chemistry and science that researchers have acquired in the past half-century and the development re quirements,remarkable progress has been made in zeolite synthesis and catalysis in the past 10 *** includes the manipulation of zeolitic monolayers derived from layered zeolites and germanosilicates to construct novel zeolite materials and effective and green zeolite syntheses as well as the synergistic interaction of zeolites and metal/metal oxides with different space distributions in the conversion of low-carbon *** many zeolite catalysts and catalytic processes being developed,our understanding of the close relationship between zeolite synthesis,structure and catalytic properties has *** are gradually approaching the goal of rationally designing zeolite catalysts with precisely controlled activity and selectivity for particular applications.

关键词： layered zeolite germanosilicates green synthesis fast synthesis bifunctional catalytic system metal confined in zeolite

EMISSION ABATEMENT FOR PRODUCTION SYSTEM ACROSS LOCATIONS WITH HETEROGENEOUS EMISSION PROFLES

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Journal of Systems Science and Systems Engineering 2017年第4期26卷 531-548页

作者： peng wu Jiuping Xu School of Business Sichuan University Chengdu 610064 China Engineering Research Center of Low Carbon Technology and Economy Sichuan University Chengdu 610064 China

This paper investigates a production system in which the desired system state is a reduction of emissions and the controlling action plan is altering carbon price. From the operations perspective, we develop a model to study how increasing carbon emission costs may affect the joint production and location decisions for a manufacturer across different locations. Specifically, our model incorporates economies of scale and explicitly links product demand, production costs and carbon emission levels to location decisions. The firm＇s decisions in production batch size and locations are then optimised. The system state of emission are analysed under different carbon prices. Finally we check the alignment of objectives in costs and emissions for the system. The results show that for a production system with economies of scale, the production allocation is transformed to a location choice problem after optimising the costs. Raising the carbon price reduces the carbon emissions but may not be able to induce the production to be placed in an emission efficient place. We propose a hybrid policy combining carbon price and free emission allowance to fully align the cost efficiency and emission efficiency and characterise the link between the emission target and the carbon price.

关键词： Carbon emissions Economic Order Quantity (EOQ) model carbon price emissionallowance and location choice

SYSTEM FOR TORQUE CONVERTER DESIGN AND ANALYSIS BASED ON CAD/CFD INTEGRATED PLATFORM

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Chinese Journal of Mechanical Engineering 2008年第4期21卷 35-39页

作者： wu Guangqiang YAN peng College of Automotive Tongji UniversityShanghai 201804 China

A 3D torque converter design system is developed based on numerical investigation into flow field and CAD technology. The 3D steady-state flow field simulation is undertaken by using time averaged Reynolds equation and k-epsilon turbulence model, with mixing-plane boundary conditions at three section interfaces. The blades are designed according to the flow field characteristics by using a reverse design method in the system. The accurateness of numerical analysis and the validity of design system are verified by the fluid field experiment of desingn example of the torque converter. This kind of design and analysis system for torque converter based on integration of comput ationol fluid dynamics （CFD） and CAD is a powerful tool for torque converter manufacturing, but also a prettg important significance for research and development.

关键词： Torque converter Flow field investigation Secondary flow

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A Feature Optimized Deep Learning Model for Clinical Data Mining

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Chinese Journal of Electronics 2020年第3期29卷 476-481页

作者： wu Tianshu CHEN Shuyu TIAN Yingming wu peng College of Computer Science Chongqing University College of Automation Chongqing University

the Artificial intelligence(AI) has gradually changed from frontier technology to practical application with the continuous progress of deep learning technology in recent years. In this paper, the Random forest(RF) algorithm is adopted to preprocess and optimize the feature subset of ICU data sets. Then these optimized feature subsets are used as input of Long shortterm memory(LSTM) deep learning model, and the early disease prediction of ICU inpatients is carried out by the method of neural network deep learning. Experiments show that this prediction method has higher prediction accuracy compared with other machine learning and deep learning models.

关键词： Clinical data mining Random forests(RF) Long short-term memory(LSTM)

A High Precision Software Compensation Algorithm for Silicon Piezoresistive Pressure Sensor

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Chinese Journal of Electronics 2019年第4期28卷 748-753页

作者： wu Tianshu CHEN Shuyu wu peng NIE Shaozhong College of Computer Science Chongqing University Chongqing Chuanyi Automation Co. Ltd.

There are generally zero drift, sensitivity drift and nonlinear error in silicon piezoresistive pressure sensors due to the inherent characteristics of semiconductor materials. It is necessary to compensate and correct the errors produced so as to meet the requirements of measurement accuracy. In order to further improve the compensation precision, based on the research of various basic software compensation methods, a surface fitting compensation algorithm based on least square method is designed, and the software is implemented on the Visual Basic platform. The experimental results show that the zero drift, sensitivity drift and nonlinear error is effectively eliminated, and the output precision of the sensor is greatly improved.

关键词： High precision compensation algorithm Least square method Surface fitting

MONITORING CARBON EMISSIONS IN PRECAST CONCRETE INSTALLATION THROUGH LEAN PRODUCTION–A CASE STUDY IN SINGAPORE

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Journal of Green Building 2014年第4期9卷 191-211页

作者： peng wu Department of Construction Management School of Built EnvironmentCurtin UniversityAustralia

The lean philosophy focuses on eliminating waste and maximizing productivity through the pull system,employee involvement,continuous improvement,*** has been discussed about the waste elimination and productivity improvement that can be achieved by applying the lean ***,as the consideration of the environment is becoming an increasingly important part of the construction culture,there is a need to investigate the applicability of the lean concept to achieve environmental sustainability,which is often used interchangeably with the term“green”.This research therefore aims to investigate the contribution of the lean concept to achieve low-carbon installation in precast concrete construction sites through a case study in *** life cycle assessment(LCA)results show that the lean concept can be adopted to reduce carbon emissions in terms of eliminating waste and inappropriate erection *** the installation cycle of a specific type of precast concrete column,an amount of 20.9kg carbon emissions(71.0%)is caused by wastes and inappropriate erection arrangements and can be reduced by applying lean principles through a detailed *** lean management practices in site layout,delivery,stock and erection management are identified in this *** on the results,contractors can start to apply lean principles to improve the installation cycle and eventually achieve low-carbon installation.

关键词： lean production prefabrication sustainable development carbon emissions life cycle assessment

Resource Allocation to Minimize the Makespan with Multi-Resource Operations

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Journal of Systems Science & Complexity 2024年第5期37卷 2054-2070页

作者： WENG wuyan CHU Chengbin wu peng School of Economics and Management Fuzhou UniversityFuzhou 350108China Univ Gustave Eiffel ESIEE Paris&COSYS-GRETTIAF-77454 Marne-la-ValléeFrance

This paper investigates a new resource-allocation problem involving multi-resource operations,where completing an operation requires simultaneous use of multiple(renewable)resources,probably of different *** goal of the study is to provide a solution method that minimizes the *** authors formulate the problem into a novel mixed-integer linear program(MILP)*** efficiently solve practical-sized instances,an exact Benders decomposition algorithm is *** algorithm divides the original problem into a master problem of allocating resources and a subproblem of calculating the makespan,and both are linked via Benders *** convergence is sped up by improving the mathematical model and embedding the variable neighborhood search *** with CPLEX,a commonly used MILP solver,the computational results demonstrate that the proposed algorithm provides tighter upper and lower bounds in most *** particular,compared with CPLEX,the proposed method can on average improve the upper and lower bounds by 4.76%and 4.39%,respectively,in solving practical-sized instances.

关键词： Benders decomposition multi-resources operations resource allocation

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Stress Wave Analysis Based Prognostic Health Management

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Chinese Journal of Electronics 2018年第3期27卷 565-572页

作者： wu Tianshu CHEN Shuyu SAL Tareen wu peng College of Computer Science Chongqing University

The stress wave sensor detect and process the electronic signal of friction, mechanical shock and dynamic load on equipment moving parts, the stress wave analysis are fulfilled by using the time domain and frequency domain feature extraction software, Polynomial neural network(PNN) and data fusion technology. The equipment status are quantitatively analyzed, the equipment fault are accurately predicted. Compared with the current adopted other analysis technologies, the system can monitor the operation condition of the equipment better in real-time, predict the fault earlier. The production safety is guaranteed, the equipment maintenance cost is reduced, and the production efficiency is improved.

关键词： Stress wave analysis Feature extraction software Polynomial neural network(PNN) Data fusion