检索结果-南通市图书馆

Microwave Disinfection in a Ventilation and Air-Conditioning System

在线全文

学校读者我要写书评

暂无评论

湖南大学学报（自然科学版） 2009年第S1期36卷 55-59页

作者： LU Zhen1,2,ZHANG Ji-li1,MA Liang-dong1,HE Juan3(1.School of Civil & Hydraulic engineering,Dalian University of technology,Dalian,Liaoning 116023,china 2.Municipal and Environmental engineering Research Center,Shenyang Jianzhu University,Shenyang,Liaoning 110168,china 3.School of Municipal & Environmental engineering,harbin institute of technology,harbin,heilongjiang 150090,china) School of Civil and Hydraulic engineering Dalian University of Technology Dalian 116023 China Municipal and Environmental engineering Research Center Shenyang Jianzhu University Shenyang 110168 China School of Municipal and Environmental engineering Harbin Institute of Technology Harbin 150090 China

Because of its broad spectrum and high efficiency,the microwave disinfection was used to control the airborne microbial contaminates in VAC *** microwave disinfection devices were developed combined with air filter,the design and calculation method was presented,and the disinfection effects on White staphylococcus,Staphylococcus aureus,Bacillus Subtilis,Escherichi coli were *** results show that the major influence factors on disinfection effect are microwave power,water-content of filter material,disinfecting *** 15 min,the kill ratio is >90%,and the log value is >*** microwave field is uniform and the kill effect of bacteria on each surface of filter is the same,without statistically significant difference.

关键词： VAC system microwave disinfection airborne microbe microwave power kill ratio

Robust Feedback controller for Exponential Stability of Nonlinear Systems with Mismatched Uncertainties

在线全文

学校读者我要写书评

暂无评论

Journal of Systems engineering and Electronics 2002年第2期13卷 92-97页

作者： Yu Kai, Zhao Chang’an & Li Shiyongdepartment of control science and technology, harbin institute of technology, harbin 150001, P. R. china(Received June 28, 2001) department of control science and technology Harbin Institute of Technology Harbin 150001 P. R. China

The robust stabilization of nonlinear systems with mismatched uncertainties is investigated. Based on the stability of the nominal system, a new approach to synthesizing a class of continuous state feedback controllers for uncertain nonlinear dynamical systems is proposed. By such feedback controllers, the exponential stability of uncertain nonlinear dynamical systems can be guaranteed. The approach can give a clear insight to system analysis. An illustrative example is given to demonstrate the utilization of the approach developed. Simulation results show that the method presented is practical and effective.

关键词： Exponential stability Nonlinear dynamical systems Uncertainty State feedback controller.

A feature ensemble technology to identify molecular mechanisms for distinction between multiple subtypes of lymphoma

在线全文

学校读者我要写书评

暂无评论

Progress in Natural science:Materials International 2008年第12期18卷 1491-1500页

作者： Yueying Yang~(a,1) Haiyun Wang~(a,b,1) Xia Li~(a,b,c) Xue Xiao~c Su Fei~a Chuanxing Li~a Hongzhi Wang~d Shaoqi Rao~(a,c,e) Yadong Wang~d a College of Bioinformatics science and technology,Bio-pharmaceutical Key Laboratory of heilongjiang Province and State,harbin Medical University,harbin 150081,china b College of Life science and technology,Tongji University,Shanghai 200092,china c The Biomedical engineering institute,Capital Medieal University,Beijing 100054,china d department of Computer science,harbin institute of technology,harbin 150080,china e department of Molecular Cardiology,Cheveland Clinic Foundation,Cleveland,OH 44195,USA [a]College of Bioinformatics science and technology Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State Harbin Medical University Harbin 150081 China [b]College of Life science and technology Tongji University Shanghai 200092 China [c]The Biomedical engineering institute Capital Medical University Beijing 100054 China [d]department of Computer science Harbin Institute of Technology Harbin 150080 China [e]department of Molecular Cardiology Cleveland Clinic Foundation Cleveland OH 44195 USA

Due to complexities and genetic heterogeneities of biological phenotypes,robust computational approaches are desirable to achieve high generalization performance with multiple classifiers,perturbations of the data structures,and biological *** purpose of this study is to extend our developed ensemble decision approach to distinguish multiple heterogeneous phenotypes and to elucidate the underlying molecular bridges that intertwine the *** work identifies the significant molecular mechanisms (disease-relevant genes and functions) that underpin the complex molecular mechanisms for distinction between multiple phenotypes. Feature genes and hierarchical gene cores identified by our method have achieved high accuracy in the classification of multiple pheno- *** results show that the proposed analysis strategy is feasible and powerful in the classification of biological subtypes and in the explanation of the molecular connections between clinical *** interpretations with Gene Ontology revealed concerted genetic pathways for some lymphoma subtypes.

关键词： Ensemble decision approach Molecular mechanisms Lymphoma Microarray

Recent advances in fermentative biohydrogen production

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Progress in Natural science:Materials International 2008年第3期18卷 253-258页

作者： Xuemei Liu a,b, Nanqi Ren a, Funan Song b, Chuanping Yang b, Aijie Wang a a harbin institute of technology, harbin 150010, china b Northeast Forestry University, harbin 150040, china harbin institute of technology Harbin 150010 China Northeast Forestry University Harbin 150040 China

Hydrogen energy, as a kind of clean energy with great potential, has been a hotspot for study worldwide. Based on the recent research on biohydrogen production, this paper gives a brief review on the following aspects: fermentative hydrogen production process and the engineering control statagy, key factors affecting the effciency of hydrogen production, such as substrates, cysteine, metal ions, anaerobic fermentation terminal products, and formic acid and ammonia. Moreover, anaerobic fermentative hydrogen-producing strain and reg- ulation and control of enzyme gene in fermentative hydrogen production are also discussed. Finally, the prospect of anaerobic fermen- tative biohydrogen production is proposed in three study areas, namely developing new techniques for breeding hydrogen-producing bacteria, exploitations of more strains and gene resources, and intensifying the application of microbial molecular breeding in hydrogen production.

关键词： Fermentation Biohydrogen production Regulation and control Novel strains

A novel model-free approach for reconstruction of time-delayed gene regulatory networks

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中国科学：生命科学英文版 2006年第2期49卷 190-200页

作者： JIANG Wei1,2, LI Xia1,2,3,4, GUO Zheng1,2,3, LI Chuanxing1, WANG Lihong1 & RAO Shaoqi1,5 1. department of Bioinformatics, harbin Medical University, harbin 150086, china 2. department of Computer science, harbin institute of technology, harbin 150080, china 3. School of Life science and technology, Tongji University, Shanghai 200092, china 4. Biomedical engineering institute, Capital University of Medical sciences, Beijing 100054, china 5. departments of Cardiovascular Medicine and Molecular Cardiology, Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA department of Bioinformatics Harbin Medical University Harbin 150086 China department of Computer science Harbin Institute of Technology Harbin 150080 China School of Life science technology Tongji University Shanghai 200092 China Biomedical engineering institute Capital University of Medical Sciences Beijing 100054 China departments of Cardiovascular Medicine Molecular Cardiology Cleveland Clinic Foundation Cleveland Ohio 44195 USA

Reconstruction of genetic networks is one of the key scientific challenges in functional genomics. This paper describes a novel approach for addressing the regulatory dependencies be-tween genes whose activities can be delayed by multiple units of time. The aim of the proposed ap-proach termed TdGRN (time-delayed gene regulatory networking) is to reversely engineer the dy-namic mechanisms of gene regulations, which is realized by identifying the time-delayed gene regu-lations through supervised decision-tree analysis of the newly designed time-delayed gene expres-sion matrix, derived from the original time-series microarray data. A permutation technique is used to determine the statistical classification threshold of a tree, from which a gene regulatory rule(s) is ex-tracted. The proposed TdGRN is a model-free approach that attempts to learn the underlying regula-tory rules without relying on any model assumptions. Compared with model-based approaches, it has several significant advantages: it requires neither any arbitrary threshold for discretization of gene transcriptional values nor the definition of the number of regulators (k). We have applied this novel method to the publicly available data for budding yeast cell cycling. The numerical results demonstrate that most of the identified time-delayed gene regulations have current biological knowledge supports.

关键词： gene regulatory networks, time delayed, decision tree.

在线全文

学校读者我要写书评

暂无评论

一种电动汽车动力电池均衡控制方法的设计

上海交通大学学报 2011年第8期45卷 1186-1190页

作者：杨春雷刘志远哈尔滨工业大学控制科学与工程系哈尔滨150001

针对电动汽车动力电池均衡控制存在的问题,给出了一种通过电压变换器和恒流电路对电池进行均衡的方法.该方法能满足各单体电池间均衡要求,且可避免尖峰电压对电池冲击.对均衡控制的整体结构进行了讨论,并介绍了电压变换器设计方法.对电... 详细信息

针对电动汽车动力电池均衡控制存在的问题,给出了一种通过电压变换器和恒流电路对电池进行均衡的方法.该方法能满足各单体电池间均衡要求,且可避免尖峰电压对电池冲击.对均衡控制的整体结构进行了讨论,并介绍了电压变换器设计方法.对电池充电过程的非线性特性,给出了一种易于实现且可满足均衡控制要求的闭环反馈的电流控制方法.实验结果表明,所设计的均衡控制方法能满足动力电池均衡控制的要求.

关键词：动力电池均衡控制电压变换器闭环反馈

Suboptimal nonlinear filters for tracking a ballistic target

在线全文

学校读者我要写书评

暂无评论

Suboptimal nonlinear filters for tracking a ballistic target

On Minimum Norm control for an Elastic Robot System

第九届全国微分方程数值方法暨第六届全国仿真算法学术会议

作者： Shu-Chun Zhang,Guang-Da Hu department of control science and engineering,harbin institute of technology,harbin 150001,china

This paper studies the problem of tracking a ballistic object in reentry phase from radar observations.A model with highly nonlinear state and measurement equations is considered and the theoretical Cramer-Rao lower bounds(CRLB) of estimation error are *** our work three suboptimal filters are designed and their error performances are compared with *** frequently used filters in nonlinear filtering problems as the extended Kalman filter and the unscented Kalman filter,A new filter combined reduced sigma point unscented transformation with classical Kalman filter is ***,simulation results favor the last that keeps the balance of good accuracy and tolerable computational complexity.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Systems science and Systems engineering 2002年第2期11卷 158-163页

作者： WANG Huidepartment of Mathematics, harbin institute of technology, harbin 150080, china department of Mathematics Harbin Institute of Technology Harbin 150080 China

In this paper, we discuss a robot system formulated as a vibrating elastic system. By regarding the damping coefficient of structure as the control variable and adjudging its optimality by norm minimum, we have proved the existence, the uniqueness and the approximation of the optimal control element by utilizing space L2(0,l) 's the reflexivity, the smoothness and the strict convexity.

关键词： robot elastic system norm minimum optimal control

Electrode Wear Prediction in Milling Electrical Discharge Machining Based on Radial Basis Function Neural Network

在线全文

学校读者我要写书评

暂无评论

Journal of Shanghai Jiaotong university(science) 2009年第6期14卷 736-741页

作者：黄河白基成卢泽生郭永丰 department of Manufacturing and Automation engineering Harbin Institute of Technology

Milling electrical discharge machining(EDM) enables the machining of complex cavities using cylindrical or tubular *** ensure acceptable machining accuracy the process requires some methods of compensating for electrode *** to the complexity and random nature of the process,existing methods of compensating for such wear usually involve off-line *** paper discusses an innovative model of electrode wear prediction for milling EDM based upon a radial basis function(RBF) *** gained from an orthogonal experiment were used to provide training samples for the RBF *** model established was used to forecast the electrode wear,making it possible to calculate the real-time tool wear in the milling EDM process and,to lay the foundations for dynamic compensation of the electrode wear *** paper demonstrates that by using this model prediction errors can be controlled within 8%.

关键词： milling electrical discharge machining (EDM) electrode wear prediction radial basis function (RBF) neural network