检索结果-内蒙古大学图书馆

DYNAMIC CHARACTERISTICS OF A HIGH-T-C SUPERCONDUCTING BEARING WITH A SET OF ALTERNATING-POLARITY MAGNETS

JOURNAL OF APPLIED PHYSICS 1995年第2期77卷 899-904页

作者： KOMORI, M MATSUSHITA, T FUKATA, S TURUTA, A IDE, T Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Kawazu 680‐4 Iizuka‐Shi Fukuoka 820 Japan

Dynamics of a superconducting bearing with a high-T//c superconductor and a setof alternating-polarity magnets are discussed. The superconductor used is prepared by the quench and melt growth process. The set of magnets levitates over thesuperconductor which is field cooled in liquid nitrogen. To construct a dynamicmodel of the superconducting bearing, responses for impulse forces given to thelevitating magnets in vertical direction are investigated. Damped free-vibration curves of the levitating magnets are observed. Dynamic stiffness and viscous damping coefficient can be defined by using the periodical vibration curves. It isalso found that the stiffness andthe damping coefficient depend on the width ofa bar magnet. The resultant energy loss of the superconducting bearing is evaluated by using the force-displacement relationship and Bean's critical state model [Phys. Rev. Lett. 8, 250 (1962)].

关键词： SUPERCONDUCTORS MAGNETS

来源：评论

学校读者我要写书评

暂无评论

DIFFUSIONAL AND ELECTROSTATIC EFFECTS ON APPARENT KINETIC-PARAMETERS OF REACTIONS CATALYZED BY ENZYME IMMOBILIZED ON THE EXTERNAL SURFACE OF A SUPPORT

引用

JOURNAL OF FERMENTATION AND BIOengineering 1995年第4期79卷 373-377页

作者： SHIRAISHI, F Department of Biochemical Engineering and Science Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka 820 Japan

Diffusional and electrostatic effects on the apparent maximum reaction rate V-m(app) and the apparent Michaelis constant K-m(app) were investigated theoretically for a system in which an enzyme immobilized on the external surface of a solid support catalyzes a reaction according to Michaelis-Menten kinetics. In such a system, the dependence of V-m(app) and K-m(app) on the substrate concentration can be expressed analytically. When the support and substrate carry charges of the same sign, resulting in a repulsive force between them, both V-m(app) and K-m(app) decrease with increasing substrate concentration, but they never decrease below the respective intrinsic values. On the other hand, when the support and substrate carry charges of opposite sign and therefore an attractive force occurs, V-m(app) decreases towards its intrinsic value, while K-m(app) decreases to values below its intrinsic value in the region of high substrate concentration.

关键词： APPARENT KINETIC PARAMETERS IMMOBILIZED ENZYME REACTION DIFFUSIONAL EFFECT ELECTROSTATIC EFFECT

来源：评论

学校读者我要写书评

暂无评论

CHANGES IN MOBILITY OF SYNAPTIC VESICLES WITH ASSEMBLY AND DISASSEMBLY OF ACTIN NETWORK

引用

BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS 1995年第1期1244卷 85-91页

作者： MIYAMOTO, S Department of Biochemical Engineering Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka Fukuoka 820 Japan

In a presynaptic terminal, neurotransmitters are stored in synaptic vesicles and secreted into the synaptic cleft as a final step of cell signal transduction. At a static state, the vesicles are retained in the highly dense actin network. Prior to exocytosis, the dense actin network must disassemble or largely be organized. Actin networks are formed in vitro which retain synaptic vesicles prepared from rat cerebral cortex. Dynamic behaviors of synaptic vesicles are measured by the dynamic light scattering method. The D-app values of synaptic vesicles confined in actin network became less than 1/4 those of free vesicles. The motions of synaptic vesicles are substantially restricted. This means that synaptic vesicles which are liberated from the actin network by detachment of synapsin 1 molecules are still trapped in the cage-like space of actin filaments. The actin network is disassembled by the actin severing protein, gelsolin, which is activated in the presence of mu M level free Ca2+ ions. The D-app(v) values of synaptic vesicles after severing the actin network return to those of free vesicles in the presence of short actin fragments. A molecular model for exocytosis in the synaptic terminal is constructed on the basis of these results.

关键词： SYNAPTIC VESICLE ACTIN NETWORK GELSOLIN DYNAMIC LIGHT SCATTERING

来源：评论

学校读者我要写书评

暂无评论

Mathematical programming formulation for neural combinatorial optimization algorithms

引用

ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC science 1995年第9期78卷 67-75页

作者： Urahama, K Member Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka Japan 820

This paper considers the analog neural solution of the combinatorial optimization problem. The solution method is analyzed based on the Lagrange multiplier method for the continuous relaxation problem of 0-1 integer programming. It is shown that the solution process can be interpreted as the solution by the gradient method for the saddle point of the Lagrange function. An improved Hopfield net is derived from the formulation as the pure integer programming. The elastic net and the generalized deformable model are derived from the mixed integer programming problem. Based on those results, an interpretation of the deterministic annealing is derived from the viewpoint of mathematical programming. It is shown that the Lagrange function can work as the Lyapunov function for the solution process and the convergence property of those neural methods of solution is analyzed.

关键词： combinatorial optimization Lagrange multiplier method Hopfield net elastic net generalized deformable model

来源：评论

学校读者我要写书评

暂无评论

BONSAI Garden: Parallel Knowledge Discovery system for Amino Acid Sequences

BONSAI Garden: Parallel Knowledge Discovery System for Amino...

引用

3rd International Conference on Intelligent systems for Molecular Biology, ISMB 1995

作者： Shoudai, T. Lappe, M. Miyano, S. Shinohara, A. Okazaki, T. Arikawa, S. Uchida, T. Shimozono, S. Shinohara, T. Kuhara, S. Department of Physics Kyushu University 01 Ropponmatsu Fukuoka810 Japan FB Mathematik-Informatik Universität-GH-Paderborn PaderbornD-33095 Germany Rsearch Institute of Fundamental Informaetion Science Kyushu University 33 Fukuoka812 Japan Department of Information Science Hiroshima City University Hiroshima731-31 Japan Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka820 Japan Graduate School of Genetic Resources Technology Kyushu University Fuknoka812-81 Japan

ISBN: (纸本)0929280830

We have developed a machine discovery system BONSAI which receives positive and negative examples as inputs and produces as a hypothesis a pair of a decision tree over regular patterns and an alphabet indexing. This system has succeeded in discovering reasonable knowledge on transmembrane domain sequences and signal peptide sequences by computer experiments. However, when several kinds of sequences are mixed in the data, it does not seem reasonable for a single BONSAI system to find a hypothesis of a reasonably small size with high accuracy. For this purpose, we have designed a system BONSAI Garden, in which several BONSAI's and a program called Gardener run over a network in parallel, to partition the data into some number of classes together with hypotheses explaining these classes accurately. © 1995, AAAI (***). All rights reserved.

关键词： Decision trees

来源：评论

学校读者我要写书评

暂无评论

Mainsteam Temperature Raising Control for a Thermal Power Plant via MRACS Based on a Quick Identification Method

引用

IFAC Proceedings Volumes 1995年第13期28卷 191-196页

作者： K. Inoue K. Kumamaru H. Nakamura Kyushu Institute of Technology Department of Control Engineering and Science Faculty of Computer Science and Systems Engineering Iizuka Fukuoka 820. Japan Bailey Japan Co. Ltd. Nirayama Shizuoka. 410-21 Japan

In this paper an adaptive way of mainsteam temperature control is proposed for a thermal power plant at the ramping stage. A physical model of the super-heater system is built up based on the experimental knowledge on actual thermal power plants. The model yields a continuous time nonlinear system with several unknown varying parameters. A quick identification method is Introduced to estimate online the model parameters. The identified model is used for designing a control signal to raise the mainsteam temperature at the outlet of the super- heater along a reference curve. In this way, an adaptive control of thermal power plant can be realized in the framework of MRACS. The effectiveness of the method has been confirmed through simulation studies.

关键词： Nonlinear systems parameter estimation system identification model reference adaptive control thermal power plant

来源：评论

学校读者我要写书评

暂无评论

A self-organized reuse-partitioning dynamic channel assignment scheme with quality based power control

A self-organized reuse-partitioning dynamic channel assignme...

引用

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： H. Furukawa Y. Akaiwa Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan

High spectrum efficiency is promised by reuse partitioning in a cellular system. We propose an improved algorithm for self-organized reuse partitioning (SORP), a distributed dynamic channel assignment scheme, in order to obviate the need for broadcasting transmit power level information of each mobile terminal. The concept of the improved scheme is simple: a mobile terminal with low transmit power uses a low numbered channel throughout the system. Reuse partitioning can be achieved owing to such a channel segmentation. The algorithm is designed to realize the channel segmentation without the broadcasting of the transmit power level. computer simulation results show that a high capacity and short delay time in finding an appropriate channel can be obtained. Furthermore, a higher capacity can be obtained by introducing quality based power control into this algorithm.

关键词： Partitioning algorithms Proposals Power control Microcell networks Broadcasting computer science Power engineering and energy systems engineering and theory Telephony Algorithm design and analysis

来源：评论

学校读者我要写书评

暂无评论

Frequency shaping of a hydraulic speaker using H/sub /spl infin// control theory

Frequency shaping of a hydraulic speaker using H/sub /spl in...

引用

American Control Conference (ACC)

作者： T. Fujii T. Tsujino T. Sugano H. Kitayama M. Hayahi N. Shikano Department of Control Engineering and Science Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan Ishikawajima-Harima Heavy Industries Company Limited Japan

Designs a control system for shaping the low frequency characteristics of a new type of hydraulic speaker, so as to-make a louder sound at low frequencies than the usual type of speaker. In this design, the authors use H/sub /spl infin// control design method, which is capable of treating both frequency shaping and robust stabilization. The authors also illustrate the validity of the resulting controller by showing some experimental results.

关键词： Frequency Control theory Loudspeakers Control systems Shape control Servomechanisms Valves Acceleration Pistons Actuators

来源：评论

学校读者我要写书评

暂无评论

A new method for parameter estimation in the NARMAX model using neural computation

A new method for parameter estimation in the NARMAX model us...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： H. Shindou M. Noshiro Y. Fukuoka M. Ishikawa H. Minamitani Faculty of Science and Technology Keio University Yokohama Kanagawa Japan School of Allied Health Sciences Kitasato University Kanagawa Japan Institute for Medical and Dental Engineering Tokyo Medical and Dental University Tokyo Japan Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan

This work shows a new method for parameter estimation in the NARMAX (Non-linear AutoRegressive Moving Average with eXogenous inputs) model using neural computation. A three-layered feedforward neural network is trained to describe a system. The actual input of the system and the computed output of the network are used as the input data set of the network for training. Parameters in the NARMAX model are calculated from the values of weights and the sigmoid functions in neural units expanded in a series by Maclaurin's formula. The structure of the NARMAX model is finally determined by the Baysian information criteria. The proposed method, therefore, requires no prior knowledge of the structure of the NARMAX model.

关键词： Parameter estimation Computational modeling Neural networks computer networks Feedforward neural networks Dentistry Biomedical engineering Intelligent networks computer science systems engineering and theory

来源：评论

学校读者我要写书评

暂无评论

ANALYSIS OF SINGULAR STRESS-FIELD AROUND THE INCLUSION CORNER TIP

引用

engineering FRACTURE MECHANICS 1994年第4期49卷 533-546页

作者： CHEN, DH Faculty of Computer Science and System Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka 820 Japan

The plane problem of an infinite plate containing an inclusion is considered. The singular stress field around the inclusion corner tip is expressed as a sum of two independent types: a symmetric type with a stress singularity 1/r(I-lambda1) and a skew-symmetric type with a stress singularity 1/r(I-lambda2). The intensities of the symmetric and skew-symmetric singular stress fields are defined in terms of constants K(I,lambda1) and K(II,lambda2), respectively. The body force method is used to calculate the values of K(I,lambda1) and K(II,lambda2). In numerical analysis, basic density functions of the body forces are introduced to characterize the stress singularity at the inclusion corner. The advantages of this technique are the high accuracy of results, due to the smoothness of the unknown weight functions, and the presence of the direct relation between the values of K(I,lambda1), K(II,lambda2) and the values of unknown weight functions at the corner tip.

关键词： Stress analysis

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：