Flight parameter calculation method of multi-projectiles using temporal and spatial information constraint

The dynamic parameters of multiple projectiles that are fired using multi-barrel weapons in highfrequency continuous firing modes are important indicators to measure the performance of these weapons.The characteristics of multiple projectiles are high randomness and large numbers launched in a short period of time,making it very difficult to obtain the real dispersion parameters of the projectiles due to the occlusion or coincidence of multiple projectiles.Using six intersecting-screen testing system,in this paper,we propose an association recognition and matching algorithm of multiple projectiles using a temporal and spatial information constraint mechanism.We extract the output signal from each detection screen and then use the wavelet transform to process the output signal.We present a method to identify and extract the time values on which the projectiles pass through the detection screens using the wavelet transform modulus maximum theory.We then use the correlation of the output signals of three parallel detection screens to establish a correlation coefficient recognition constraint function for the multiple projectiles.Based on the premise of linear projectile motion,we establish a temporal and spatial constraint matching model using the projectile’s position coordinates in each detection screen and the projectile’s time constraints within the multiple intersecting-screen geometry.We then determine the time values of the multiple projectiles in each detection screen using an iterative search cycle registration,and finally obtain the flight parameters for the multiple projectiles in the presence of uncertainty.The proposed method and algorithm were verified experimentally and can solve the problem of uncertainty in projectiles flight parameter under different multiple projectile firing states.

Pairwise Fusion Approach Incorporating Prior Constraint Information

In this paper,we explore sparsity and homogeneity of regression coefficients incorporating prior constraint information.The sparsity means that a small fraction of regression coefficients is nonzero,and the homogeneity means that regression coefficients are grouped and have exactly the same value in each group.A general pairwise fusion approach is proposed to deal with the sparsity and homogeneity detection when combining prior convex constraints.We develop a modified alternating direction method of multipliers algorithm to obtain the estimators and demonstrate its convergence.The efficiency of both sparsity and homogeneity detection can be improved by combining the prior information.Our proposed method is further illustrated by simulation studies and analysis of an ozone dataset.

我国物流信息化现状与发展研究

信息化已经成为当今世界经济和社会发展的重要趋势,物流信息化是促进我国物流产业进一步发展,实现现代物流运作的关键环节。文章深入分析了我国物流信息化现状及制约因素,提出突破物流信息化“瓶颈”的发展对策。

An automatic unified modeling method of geological object and engineering object based on tri-prism(TP)

For the interaction relation between geological object and engineering object in some fields related to water conservancy and hydropower, a unified modeling idea was proposed. On the basis of summarizing both advantages and disadvantages of existing modeling methods, an automatic unified modeling method of both engineering and geological objects based on tri-prism(TP) model was presented. Through the lossless correction algorithm of deviated drill holes contained in this method, the real deviated drill holes could be corrected into the equivalent virtual vertical ones. And the correction accuracy fully meets the requirements of unified modeling. With the virtual vertical drilling data, TIN construction of both cover layer and other stratums would be built in order to obtain the 3D geological model. Then, the engineering design data would be introduced into the 3D geological model for achieving unified modeling. For this process, the volume subdividing and restructuring principles were introduced to deal with the spatial relationships between engineering object and geological object. In order to improve the efficiency of unified modeling, the reconstruction of TIN based on constraint information was also applied in this method. At last, the feasibility and validation of the unified modeling method as well as its relevant key algorithms were verified by specific experiments and analysis of results.

约束理论在企业信息化中的应用

约束理论让人们有能力以逻辑和系统的方式回答企业信息化进程中做持续改善时必问的三个问题:要改进什么?要改进成什么?怎样使改进得以实现?从而使问题的浮出和答案的寻求变得简单。以企业信息化进程中可能遇到的典型问题为例,探讨了如何在企业信息化建设的进程中寻标治本。

河南省物流企业信息化发展制约因素探究

河南是一个物流大省,但物流企业信息化水平不高。文中从河南省物流企业信息化的发展现状出发,探寻制约物流企业信息化发展的瓶颈,提出促进河南物流企业信息化发展的路径,对推进物流企业的信息化建设和企业发展壮大具有重大的现实意义。

广西农业信息化现状与发展路径探讨

【目的】分析广西农业信息化发展现状,为推进广西农业信息化进一步发展提供参考。【方法】通过总结广西农业信息化发展现状及分析其发展的制约因素,提出相应的发展思路及保障措施。【结果】广西农业信息化构建了强力支撑、多级联动的组织体系,"龙头"带动、纵横交融的基础网络",进村入户"、结构多元的服务模式,智能互动、高效管理的应用系统,安全稳定、综合运行的应用平台。但仍存在对信息化支撑现代农业发展的认识不到位、资金投入不足、农业信息化机构设置不健全、信息专业人才缺乏、政府引导作用发挥不强、社会力量参与积极性不高等问题。【建议】应大力推进农业生产经营信息化、提升农业生产指挥及应急调度能力和市场信息应用与服务能力、完善农产品质量安全监管体系建设、不断提高农村经营管理信息化水平、推进农业科技创新与信息化推广应用、积极探索农业电子商务发展模式、强化农业信息资源综合开发利用,同时采取加强组织领导、强化顶层设计,采取试点引路、分期分步实施,加大资金投入、强化合作共赢,强化信息员队伍建设、完善农业信息化服务体系等保障措施,以实现广西农业信息化工作持续健康发展。

Ergodic switching control for diffusion-type processes

We consider the control of the diserete component n_(t)of a owitching Markov proceaa x_(t)=(z_(t),n_(t))when there ia a running cost and an immediate coat c(i,j)for owitching n_(t)from i to j.We satudy the minimization of the ergodic(or long-term average)total coat.Eooentially,this paper trento the cnce where,for n_(t)=n fixed,z_(t)ia a reflected diffusion or a reflected diffusion with jumps,nt being,for fixed z,a continuous-time Markov chain.Using the vanishing discount appronch,we exctend existing reoulta dealing with the situation where nt evolvea only by the switching control action and the diffusion is non-degenerate.Moreover,we solve the ergodic problem for a claso of diffusiono which can be degenerate and for an example with aboorbing atate.

Measure of instability

TheMahlermeasure,a notion often appearing in the number theory and dynamic system literature,provides a way to quantify the instability in a linear discrete-time system.