Gamma-ray burst is the highest energy phenomena found by people in cosmos so far.According to observatory,it can be divided into two classes.Mukherjee(1998)and Horvath(1999) respectively used different methods to reach the conclusion that gamma-ray bursts would be divided into three classes.People want to know the nature of the third class in the new classification of gamma-ray bursts and the difference from the other ones.The spectral hardness ratio of three classes is calculated and discussed.The physical mechanisms of the new third may be different from others.

In this paper,by noumenon polymerization method,PVP copolymer hydrogel is made using(HEMA) and NVP as monomers,N,N′-methylene bisacrylamide(Bis) as crosslinker and azobis iso butyro nitrile(AIBN)as initiator.The oxygen transmissibility of PVP copolymer hydrogel is analysized.It is found that oxygen transmissibility increases with the increase of NVP in the copolymer hydrogel,and decreases with the increase of KH570 in the copolymer hydrogel.Dk/L amounts to the maximum 45cm~3/(cm~2·s·mmHg)when the content of KH570 is 8%;it increases with the increase of temperature,and decreases with the increase of the membrane’s thickness.

By the technique of protoplast fusion,interspecific fusants RH-1 between Pseudomanos SY-1 and Norcardia RB-1 have been obtained.The stable fusants are used to treat the bleat the bleaching effluent.It is obtained that the removal rates of CODCr and TCl are respectively 72.05% and 190%,higher than those of the mixed parent strains.Several kinds of junior nutriments are added to the reactor,and the alcohol shows its good co-degradation function.The removal rates of CODCrand TCl are respectively 73.87%and 68.54%. 

The environmental behavior of nano-sized TiO2 in water source is studied in the accumulation of particles and the influence on viscosity and settling.The larger the particle concentration is,the faster accumulation happens.Nano-sized TiO2 added to water would change the flow and settling characteristics of water,which is affected by temperature and pH value.It is also shown that nano-sized TiO2 has more effect on low temperature and neutral pH water source.

In this paper copper is reduced by formaldehyde which is contained in the wastewater of chemical copper plating.The EDTA acid can be recycled after acidulation.Using EDTA,EDTA-Na2 and new chemical copper plating solution are prepared.It is shown that the removal rate of copper is 99.6%.The（EDTA） recovery is more than 98%,and the purity of EDTA-Na2 which is made from EDTA is more than 98.5%.It can be used in industrys of chemical copper plating again.

The crack-tip extension displacement range is utilized to describe the rate of short fatigue crack propagation.The test result of normalized 15MnVNq shows that the proposed method is effective and accurate.

The existence and uniquence of equillibrium to DWNN are given with brouwer fixed point theory and contraction mapping theory.By means of using the Halanay differential inequality with delay and the theory of bidiagonal dominance matrice,the global exponential stable is studied,and a series of important results are obtained.

The problem of H_∞ guaranteed cost control for a class of discrete-time uncertain singular systems is studied.A sufficient condition for the solvability to the problem in terms of certain matrix inequalities is obtained.Furthermore,the H_∞ guaranteed cost controller design method is given.The control law guarantees that the closed-loop systems is regular,causal,as well as stable,and satisfies a prescribed H_∞ norm constraint.The cost of the closed-loop systems is within a certain bound for all these admissible uncertainties.Finally,a numerical example is given to illustrate the design method.

In the optimization design of single layer latticed domes,the used mathematical models without considering uncertain factors have some extents of limitations.Based on the considering of fuzzy and random quality of each design parameter of single layer latticed domes,a new multi-objection optimization model is established.In this model,the fuzziness of multi-objective function and the stress control criterion are solved.The computation results for single layer latticed domes demonstrate that the model is reasonable and feasible.

In this paper,a robust pseudoridges extraction algorithm for fingerprints is presented to gain the global geometric shape of fingerprint ridges of pattern area.The algorithm adopts the skillful processing method for orientation field estimates,so that the pseudoridge traced remains constant under large variations of local ridge orientation.Hence it is more robust than the feature of the specific ridges.In the tracing process,a method with adaptive tracing and estimating the orientation only on the traced point is presented to reduce the operation time.The algorithm for pseudoridges extraction has been tested on the 500 fingerprints of NJU fingerprint database,and gets the good performance according to the experimental results.

This paper introduces the categories of intrusion detection and the application of data mining technology in anomaly detection.It also describes the design and the implementation of the anomaly IDS based on data mining algorithms,RIPPER.

Discuss some peculiarity of UML and the UML modeling process in Microsoft Visio.With the(example) of Reservoir Resettlement MIS,the modeling scheme of UML in Visio is hold and arranged.

In this paper,two novel approach laws called I-variable speed reaching law and m-variable speed reaching law are brought forward and the design method of VSC is given which is obtained straightforward by the reaching law method,based on the discrete time linear constant system.It is shown that under the action of the VSC on the system the reaching mode and sliding mode have changeable speeds,the good performance of reaching mode is kept and the chatter of quasi-sliding mode is weakened very well.Therefore,the performance of the closed loop system is improved.The simulation results have revealed that the design methods are effective and feasible.

This paper emphases the working principle together with the main components of Sigma-Delta A/D converter,and the working process of this appliance by Simulink of MATLAB language is simulated and analysed.

In the study,frequently met is the problem of connection between the computer and the digital devices based on GPIB which are used to complete waveforms and data sample.In this article an example of the connection between the computer and three oscilloscopes TDS 210 is given to introduce the method of set-ting up the GPIB address and using GPIB interface to accomplish the waveforms and data sample on Lab-VIEW,It is shown that this method is successful.

Based on the Symphony distributed control system,the paper realizes the communication between PC and DCS by using the interface program software SemAPI,and achieves the purposes of extending and sharing the data.

This paper presents a kind of multi-channel data acquisition system composed of programmable system device PSD and single-chip microprocessor.It is demonstrated that such a system has the advantages of circuit simplification,higher reliability and flexible configuration,and it owns great practical value.

According to the trend of micromation,intellectualization and networklization of sensor,the hardware and software design method of a TCP/IP-based intelligent sensor is discussed in this paper by analyzing the structure and characteristics of the networked intelligent sensor.The experiment results demonstrate a satisfying performance on measurement and network communication of the sensor by using this method.The intelligent networked sensor has been utilized successfully in the measurement and control system of environment factor in agriculture modernization of Guangdong province.

This system begins with investigating the saturated clay from the Pearl River Delta.By taking original earth to obtain the original microstructure-clay sample the interstice rate and the three-dimensional information from the image are calculated.It focuses on the transformation from 2D image to 3D which is based on tridimensional rebuilding of deep images.

This paper presents an intelligent closestool system(ICS) in which medical examination equipments and closestool are combined together.The feature of equipments in ICS is also described,as well as the current development of urinary analyzer in clinic.It chiefly shows that the system is designed for the analysis of urine by near-infrared spectroscopy.

The article introduces the method of utilizing public key encryption system to carry on the digital signature.It puts forward the security model of the campus network authentication system based on the digital signature technology.It explains the systematic structure of the model and its realization.

In this paper several technologies of improving campus network performance are discussed,The network performance is analyzed based on existing network environment and methods are put forward for improving campus network performance by using technologies of Qos,multicast,VLAN and Web cache server,etc,so as to optemize campus network.

In this paper the static pressure uniformity in the static pressure chamber of supply air duct is studied by means of experiments,and its coefficient is derived.At the same time the static pressure decay coefficients between the main duct and static pressure chambers are obtained and analyzed,and the developing equations of static pressure in the static pressure chamber are found on the basis of experiment analysis.

According to the actual condition of the asphalt pavement project,the various factors to affect the operation performance of the asphalt pavement are analyzed in the qualitative and quantitative forms having instructive role for the design,construction and maintenance of the asphalt pavement.

By the theorem of existence of global attractors,this paper proves existence of global attractors of the reaction-diffusion equation.

The paper has discussed such problims as the properties of sub-eigenvalue and sub-eigenvector of real-anti-sub-symmetric matrix,and its diagonalization.Based on the above,the following result could be approached:If Ais a realanti-sub-symmetric matrix,then there exists a perpendicular matrix P.Multiplied with P and its reversal PSTfrom the right and the left respectively,the matrix will become a diagonalmatrix.

Studies about the maximum gemus of a graph are usually based on some invariariable parameters,such as connectivity,diameter,the degree of vertexes.In contact with the number of cut vertexes of a graph,this paper studies the lower boundary of maximum genus and receives some new results.