評兒玉哲夫君的論文“關於正規單純代数的交換子群”

儿玉哲夫君的这篇论文(T.Kodama,On the commutator gioup of normal simple algebra,Memoirs of the Faculty of Science,Kyusyu Univ.,Ser.A,10,141,1956)目的在于将评者关于代数数域上的单纯代数的交换子群的一个结果(王湘浩,On the commutator group of a simple algebra,Am.J.72,323,1950)推     

A Local Asymptotic Behavior for Ruin Probability in the Renewal Risk Model

Let R(t)=u ct-sum from(i=1) to (N(t)) Xi,t≥0 be the renewal risk model,with FX ( x )being the distribution function of the claim amount X. Let ψ (u ) be the ruin probability with initial surplus u. Under the condition of FX (x) ∈ S *(γ ),γ≥ 0,by the geometric sum method,we derive the local asymptotic behavior for ψ (u ,u z for every 0＜z＜∞. On one hand,the asymptotic behavior of ψ ( u) can be derived from the result obtained. On the other hand,the result of this paper can be applied to the insurance risk management of an insurance company.     

Solder bridge mechanism in surface mount technology

In the light of the minimum energy principle, the energy equation for the forming process of a joint is formulated, and the forming process of bridged joints is numerically simulated. On this basis, the mechanism of bridging in surface mount technology (SMT) is investigated.     

SPECIAL TOPICS: Extended Coulomb failure criteria for the Zipingpu reservoir and Longmenshan slip investigated by researchers at the Chinese Academy of Sciences

Describing the correlation of a reservoir and earthquake slip remains a great challenge. Professor SHI Yaolin and his group at the Key Laboratory of Computational Geodynamics of the Chinese Academy of Sciences and the College of Science of the Graduate University of the Chinese Academy of Sciences are attempting to solve this problem. On the basis of the laboratory’s parallel central processing unit (CPU)     

Asymmetric Deep Hashing for Person Re-Identifications

The person re-identification(re-ID) community has witnessed an explosion in the scale of data that it has to handle. On one hand, it is important for large-scale re-ID to provide constant or sublinear search time and dramatically reduce the storage cost for data points from the viewpoint of efficiency. On the other hand, the semantic affinity existing in the original space should be preserved because it greatly boosts the accuracy of re-ID. To this end, we use the deep hashing method, which util...     

Task Offloading Strategy with Emergency Handling and Blockchain Security in SDN-Empowered and Fog-Assisted Healthcare IoT

With the rapid advancement of the Internet of Things(IoT), the typical application of wireless body area networks(WBANs) based smart healthcare has drawn wide attention from all sectors of society. To alleviate the pressing challenges, such as resource limitations, low-latency service provision, mass data processing, rigid security demands, and the lack of a central entity, the advanced solutions of fog computing, software-defined networking(SDN) and blockchain are leveraged in this work. On the...     

Principle of Melt-glue Cloth

This paper advances a new concept of textile-melt-glue cloth, and introduces the readers to the basicprinciple of melt-glue cloth. On the basis of meltspinning, the spinneret can be replaced by a spinningdevice that consists of an outer spinneret (a loop)and an inner spinneret (a round plate), and betweenthem there is an interval circle on which the centers     

北京师范大学学报（自然科学版）2005年第41卷总目次

函数系(zτn)在Non-Carath啨odory域中的完备性…………………………………………………………………杨向东邓冠铁(1)On the completeness of the system(zτn)inLp………………………………………………Yang Xiangdong Deng Guantiep阶拟循环群理论的模型论性质…………………………………………………………………………………周明宏沈复兴(4)The models and properties of the theory ofpquasicyclic group………………………………Zhou Minghong Shen Fuxingp阶拟循环群理论的可数模型…………………………………………………………     

An optimizing selection model in preparation of powdery emulsion explosives

In order to get cheap and excellent PEE (Powdery Emulsion Explosives), the model of optimizing selection on preparation of PEE was established by the Neural Net Theory (NNT). On the basis of some data in the study of PEE, the training, prediction and optimizing selection of the Neural Net (NN) model were finished by compiling procedures. The results indicate that the model is helpful to the preparation of PEE and worthy to extend and apply broadly.     

Metal deformation in skew rolling step-shaft

The process of rolling step-shaft was simulated with the help of the FEM (Finite-Element Model) software-DEFORMTM 3D. The characteristics of metal flow in different periods were analyzed, and the curve of variety in non-round area at different crosssections of the rolled piece, the curve of variety in bulge volume and the curve of variety in non-column volume were obtained. On this base the method of tool design is worked out and validated by experiment.     

A new improvement of TCP based on adaptive filtering

On the basis of studying the standard TCP retransmission mechanism,this paper proposes a method to adopt the theory of adaptive filtering in the field for the estimation of round trip time (RTT).Then t...     

PRELIMINARY STUDIES ON STRUCTURES AND PROPERTIES OF WATER-RETENTIVE, FLAME-RETARDANT ACRYLIC FIBERS

The blend fibers of acrylonitrile-vinylidene chloride-sodium methallysulfonate copolymer(AN-VDC-SMAS) and cellulose acetate (CA) with various blend ratios were investigated bymeans of SEM, DDV, WAXD, etc. The results show that AN-VDC-SMAS and CA areincompatibale; the numerous microvoids in the blend fiber resulted from the phase seperationcan remarkably improve the water absorbability and the dyeing behavior but hardly influencethe mechanical properties. On the other hand, the crystal structure of the continuous phaseAN-VDC-SMAS is not influnced by the dispersed phase CA.     

Study on temper-rapid cooling process of low carbon steel produced by CSP

On the basis of the effect of carbon precipitation on the microstructure and properties of steel products below A₁ temperature, a new thermal treatment method (temper-rapid cooling process) was studied. By the temper-rapid cooling process, the yield strengths of the high strength low carbon (HSLC) steel ZJ330 and SPA-H produced using the compact strip production (CSP) process increased from 340 to about 410 MPa and from 410 to about 450 MPa, respectively. The results indirectly indicated that there existed nanoscaled iron-carbon precipitates that have obvious precipitation effect on low carbon steel produced by CSP. The prospect of application is discussed.     

The propagation of seafloor spreading in the southwestern subbasin, South China Sea

On the basis of the summary of basic characteristics of propagation, the dynamic model of the tectonic evolution in the South-western Subbasin (SWSB), South China Sea (SCS), has been established through high resolution multi-beam swatch bathymetry and multi-channel seismic profiles, combined with magnetic anomaly analysis. Spreading propagates from NE to SW and shows a transition from steady seafloor spreading, to initial seafloor spreading, and to continental rifting in the southwest end. The spreading in SWSB (SCS) is tectonic dominated, with a series of phenomena of inhomogeneous tectonics and sedimentation.     

泊松流形中的一般哈密尔顿系统

Symplectic geometryis one of the most i mpor-tant research subjects.In particular,the investiga-tion of the symplectic structures and the Poissonbrackets are closely related to the analytic mechan-ics.Nowadays,the symplectic method has been oneof the most i mportant toolsinthe study of dynami-cal systems[1-6].On the other hand,the(general-ized)Hamiltonian systemis one of the most i mpor-tant research fields in nonlinear sciences,which isdirectly related to astronomical mechanics,aero-nautical…     

Development and application of WebGIS middleware in oil production engineering

WebGIS is the result of combining the technology of Internet with that of Geographic Information Systems (GIS). This paper aims at some problems in the development of GIS. such as the system of development is instable, and presents the method of adopting component technology to accomplish WebGIS middleware which has been successfully applied to the Oil Production Engineering information visible system. It showed in practice that the WebGIS middleware can be easily embedded in the web pages to accomplish GIS application system in a network environment. On the one band. its application can reduce complexity of system and speed up the pace of development. On the other hand. it is certain to reduce the development costs and improve the main tainability.     

A New—style Permanent—magnet Motor with Double—stator Structure

A new-style direct drive motor with double-stator structure is proposed. The structure and principle of the permanent-magnet (PM) brushless motor are discussed. On the basis of numerical calculation, the cogging torque waveforms of the prototype rrmtor when staggering two stators are analyzed. The method that can reduce torque ripple making use of the structure features of this motor is investigated. The results of numerical calculation and experiment indicate that designing motor with this kind of structure is a good seherne for increasing the power density.     

Late Mesozoic interaction between crust and mantle in coastal area of Zhejiang-Fujian

This paper summarizes the lithogeochemical features of composite lavas, dikes and plutons composed of early Cretaceous associated basic-acidic igneous rocks from the coastal area of Zhejiang-Fujian. On the basis of the studies on Nd, Sr, Pb isotopic signatures and geochemical characteristics of large ion lithophile elements (L1LE) , light rare earth elements (LREE) and high field strong elements ( HFSE) of these contemporary basic-acidic igneous rocks, it is considered that the source enrichment caused by the subduction of Pacific plate and contamination of crustal rocks and melts during ascending process may lead to the formation of basaltic magmas with a high LILE concentration. These late Mesozoic composite basic-acidic igneous rocks are the products of the interactions between crust and mantle in active continental margin.     

Impact of Informatics on QIPC

Quantum information processing and communication(QIPC) is an area of science that has two main goals: On one side,it tries to explore(still not well known) potential of quantum phenomena for(efficient and reliable) information processing and(efficient,reliable and secure) communication.On the other side,it tries to use quantum information storing,processing and transmitting paradigms,principles,laws,limitations,concepts,models and tools to get deeper insights into the phenomena of quantum world and to find efficient ways to describe and handle/simulate various complex physical phenomena.In order to do that QIPC has to use concepts,models,theories,methods and tools of both physics and informatics.The main role of physics at that is to discover primitive physical phenomena that can be used to design and maintain complex and reliable information storing,processing and transmitting systems.The main role of informatics is,one one side,to explore,from the information processing and communication point of view,limitations and potentials of the potential quantum information processing and communication technology,and to prepare information processing methods that could utilise potential of quantum information processing and communication technologies.On the other side,the main role of informatics is to guide and support,by theoretical tools and outcomes,physics oriented research in QIPC.The paper is to describe and analyse a variety of ways and potential informatics contributes and should/could contribute to the development of QIPC--see also Gruska(1999,2006,2008).     

JOURNAL OF QINGDAO UNIVERSITY (Natural Science Edition) VOL. 14 CONTENTS

NO. 1 On Generators of Free Left-Supersymmetric Algebras and Univerrsal Enveloping Left-Supersymmetric Algebras …………………………………… Wang Xiandong Wang Xinmin (1) The Retro-System Decoupling Control on the Non-Linear Multi-Variable System …………………………………………………… Zhao Jingbo ZhouXianglong Zhu Haibin (6) Uniqueness of the Solution of Generallzed Liénard System to the Initial Value Problem ……… Sun Ruide (13) Using in Positive Integer Set …