Abstract:A new type of intramolecular double-helical compound was synthesized by connecting chiral 2,2'-substituted 1,1'-binaphthyl with meta-pyridine bridge.The structure was identified by MS,NMR and elemental analysis.

Abstract:A novel topological index called Y-index was developed based simultaneously on the bond distance and bond adjacent matrices for a molecular. The topological index Y was of good resolution and high recognition for various molecular structures and of good r

Abstract:对闪锌矿还原氯酸钠制备二氧化氯的反应过程进行了研究 ,得出反应的最佳条件 :反应体系中硫酸的浓度须维持在 2 .5～ 3 .0 mol/ L,闪锌矿过量率为 2 %～ 4 % ,温度为 60℃左右 ,氯酸钠初始浓度为 4～ 5mol/ L.该法具有反应温和、易于控制、硫酸消耗少、成本低廉和产品纯度高的优点

Abstract:This paper tests the export-led growth hypothesis by using approaches of co-integration techniques and Grange-causality test in China .It is found that there exists a unique co-integration relationship among GDP, exports and terms of trade ,and there is a

Abstract:We have given a necessary condition for a locally convex space to be a second category space and have proved that the (LB) spaces are first category spaces.

Abstract:We obtain sufficient conditions for stability of the zero solution of a class of impulsive difference equations of unstable type,and show that the stability is caused by impulses.

Abstract:We establish a theorem on subdirect product represention of strongly generalized-continuous lattices in terms of complete chains.It includes known results on completely distributive lattices and on traditional continuous lattices as its special cases.

Abstract:The combination of photoelastic and numerical method is used to study the two-dimensional elastic contact problems.Based on the boundary integral equation method,the system equation of contact problems,including contact conditions,is established.By increm

Abstract:引入外参量，推导一维和二维伊辛模型的配分函数的矩阵形式，把对自旋变量的求和，化为对外参的偏导，计算非常简便。

Abstract:This paper established a mechanical model for the elastic disc-shaft system containing a transverse crack in general case, and a set of dynamic equations are set up by using Lagrange principle. An assumed modes method is developed to investigate the vibra

Abstract:A theory of using extensible process tree in IVR system is presented, and the way to construct the process tree is also described. Using process tree we can set IVR system freely. In this way, the problem of setting and expansibility in current IVR syste

Abstract:通过光学活性的2，2′－二取代1，1－′联萘和间吡啶桥的连续，成功地合成了一种新型分子内双螺旋化合物，其结构径MS、NMR和元素分析得到确定。

Abstract:By means of the back-propagation training algorithm,three layer artificial neural network is applied to pattern recognition of ceramic raw materials. Taking characteristic parameters of ceramic raw materials as identified rule,the best network parameters

Abstract:This paper analyses the possibility of stable ignitability of swirl Diesel Engine,points out the ways and methods arriving stable ignition and realizes stable ignition at fixed point in main combustion chamber in time,which makes swirl Swirl Diesel engine

Abstract:A feed-forward back propagating neural network is trained to achieve and maintain control of the unstable periodic orbits embedded in a chaotic attractor on the inputs of parameter perturbation model.The numerical simulation demonstrates the scheme is of

Abstract:Combining with examples and using the principle of file formats transformation and CAD software, this paper shows the implementation of the drawing transformation of the automobile body under the different industry standards based on 3D feature models.

Abstract:The application of a multi-branch communication network in extruder is introduced.The network is made of PLC, Frequency Convter and Temperature Controller.By means of digit communication,many functions such as Temperature Controller's read out and read in

Abstract:The adaptability and economic performance of the existing harvest machine of rice-wheat is not fine,and it is especially not fit for using in the foothill areas for its great weight and expensive cost.Avoiding the disadvantages,learning the advanced exper

Abstract:This paper introduces the detecting of main frequencies for multistage texture image, using Gabor filter to define the main frequency and applying edge extracting for texture segmentation.

Abstract:对闪锌矿还原氯酸钠制备二氧化氯的反应过程进行了,得出反应的最佳条件：反应体系中硫酸的浓度须维持在2．5－3．0mol／L，闪锌矿过量率为2％－4％，温度为60℃左右，氯酸钠初始浓度为4－5mol／L，该法具有反应温和、易于控制、硫酸消耗少、成本低廉和产品度高的优点。

Abstract:The environment of application for the heat pipe air preheater is analyzed. The research and manufacture work of the heat pipe and the design of the heat exchanger is briefly discussed. The positive effect is proved in real applications.

Abstract:By analyzing the test data of twelve restrained rectangular beams which were fixed after destroying under concentrated loads, the conception of effective CFRP strain and the contribution of inclined external CFRP to shear capacity are put forward.

Abstract:The principle of MR smart dampers are introduced simply. Through a field testing of a stay cable attached with Magneto-rheological(MR) dampers implemented on Dongting Lake Bridge, the modal damping ratios of cable under the different voltage applied to MR

Abstract:On the basis of theoretical analysis and existing works, the Marqardt-Hartley method to which factors are recommended is put forward to determine the stormy formula parameters with computer. Results in practice show that this method removes the defects of

Abstract:A modified Vlasov two-parameter soil model in Gibson soil is developed and the corresponding soil response function is derived.The stresses and the surface displacements of the soil subjected to a line load and a uniform strip load are analyzed.The result

Abstract:Laboratory-scale experiment was conducted to evaluate the influence of L/d value,filtration rate and filter aid on the filtration, and the value of these parameters are proposed. The results show that filter aid,L/d value and filtration rate have great e

Abstract:This paper studies the placement method of VBR video objects on the multi-zone disks, the organizing methods of the video files, and the disk I/O smooth scheduling and admission controlling policies. It mainly develops a scale placement algorithm and the

Abstract:The authors discuss the side-effect of the expression in functional languages when the assignment is incorporated,its effect on the check preciseness of the program,and how to reduce the side-effect in the imperativce languagess. The notion "good side-eff

Abstract:采用协整分析技术和Granger因果关系检验方法，检验了出口带动经济增长（Export-led growth,ELG）假设在中国的情况。结果表明，GDP、出口与贸易条件之间存在唯一协整关系，即三者之间存在长期的稳定均衡关系；存在出口增长到GDP增长的单向Granger因果关系，说明出口带动经济增长的假设在中国是成立的。