S中国销售公司投诉流程优化仿真

业务流程决定了企业运营的效率,其涵盖了采购、制造、销售等一系列的生产环节,因此对流程的分析和优化对于企业管理来说有着十分重要的作用。投诉,在日常生活中是商家和客户关系中最常见却又最敏感的问题,投诉问题处理好坏直接关系到商家的信誉和品质,应该引起足够的重视。本文分析了现有的S中国销售公司的投诉流程,发现其流程在时间成本和费用成本的消耗上都存在问题,需改进。利用Witness仿真软件对投诉流程系统进行建模和仿真,提出了投诉流程的优化方案,仿真结果证明了改进后方案的可行性和有效性,为流程的优化提供了一种有效的定量分析技术。     

带有异常结构程序的数据流分析

以数据流分析为基础的程序理解是软件工程重要研究领域之一。现在大多数的程序设计语言提供了异常处理机制,但程序中的异常结构会影响数据流分析。如果不考虑这种影响,把得到的数据流分析信息用于程序理解中,会产生严重的后果。文中以Java语言程序为例,提出了一种数据流分析方法,该方法充分考虑了异常结构对数据流分析的影响,从而保证数据流分析信息的正确性与准确性。     

一种不确定图中最可靠最大流问题的解决方案

最可靠最大流是不确定图中可靠性最高的最大流,它是传统最大流问题在不确定图上的自然延伸.现有的最可靠最大流算法SDBA时间复杂性较高,无法满足实际中不同应用的需求,为此,文中提出一种具有普遍适用性的最可靠最大流解决方案.该方案包含面向不同需求的3种算法:基于负权群落消去的NWCE算法、基于时间约束优先单环消去的SPEA-t算法和基于概率阈值约束优先单环消去的SPEA-p算法.其中,NWCE算法借鉴最小费用最大流的"流平移"思想并基于文中提出的负权群落概念,在辅助剩余图中不断地消去可使可靠性增加而流量不变的负权群落,可证当消去所有负权群落时对应的最大流即为最可靠最大流.根据负权群落中由单环组成的群落占很高比例且相对于多环组成的群落更易查找和消去的性质,同时考虑到NWCE算法为了获得最优解,往往为了消去最后少数几个对概率提高贡献很小的负权群落却花费了很长时间的现象,提出SPEA-t和SPEA-p两种快速近似算法,前者是以规定时间内尽可能逼近最优解为目标,后者是以最少时间达到预设的概率阈值为目标,它们都采用了优先消去概率-时间效益较好的单环群落的策略,加快对最优解的逼近速度,减少或放弃时间开销较大的多环群落的消去,以满足那些对算法时间性能要求很高而结果以近似最优即可的应用需求.实验表明,相对于SDBA算法,NWCE算法结合概率剪枝策略在时间性能上有了数量级的提高,而SPEA-t算法和SPEA-p算法则具有更高的性能和更好的适用性.     

微小流量传感器的研制

介绍了一种新型基于可变面积原理设计的微小流量传感器,阐述了高准确度微流量传感器理论设计方法、结构特点及传感器的信号处理技术,同时也对微流量传感器的标定测试方法进行了探讨和实验验证。实际测量和使用表明:该传感器具有准确度高、可靠性高、抗干扰能力强、结构简单、智能化等特点。     

复合式质量流量计的研究

针对纸浆液固两相流质量流量和浓度测量过程中存在的问题,研究开发了一种复合式质量流量计。该流量计一方面采用DSP和频域相关算法实时、高精度地获取体积流量信号;另一方面采用静刀式浓度变送器获取浓度信号,并通过C8051F005单片机间接得到纸浆质量流量。试验表明,该流量计能够同时输出体积流量、浓度和质量流量信号,在纸浆两相流测量领域具有良好的应用前景。     

The State of the Art in Flow Visualisation: Feature Extraction and Tracking

Flow visualisation is an attractive topic in data visualisation, offering great challenges for research. Very large data sets must be processed, consisting of multivariate data at large numbers of grid points, often arranged in many time steps. Recently, the steadily increasing performance of computers again has become a driving force for new advances in flow visualisation, especially in techniques based on texturing, feature extraction, vector field clustering, and topology extraction. In this article we present the state of the art in feature‐based flow visualisation techniques. We will present numerous feature extraction techniques, categorised according to the type of feature. Next, feature tracking and event detection algorithms are discussed, for studying the evolution of features in time‐dependent data sets. Finally, various visualisation techniques are demonstrated. ACM CSS: I.3.8 Computer Graphics—applications     

液体流量标准装置中开式换向器测量误差模型研究

针对液体流量标准装置中开式换向器对流量测量带来误差问题,分析了目前开式换向器测量不确定度分析中存在的局限性;在考虑换向挡板位置及喷嘴流速分布实际情况的基础上,建立了换向挡板在换入/换出行程的不同位置时引入的开式换向器流量测量误差模型。采用改变换向挡板位置的方法,并基于新建模型对开式换向器在流量测量中引入的测量误差进行了理论计算,计算结果与试验数据进行了比对,取得了较好的一致性。结果表明,本文建立的换向挡板在换入/换出行程的不同位置时引入的测量误差数学模型是合理的,能够满足开式换向器流量测量误差的分析计算。     

孔板浮子流量计原理分析与实验

浮子流量计具有结构简单、工作可靠、压力损失小、可测低流速介质等优点,广泛应用于流量测量。但经典的锥管浮子流量计的测量精度受锥管加工精度影响较大,所以锥管的加工费用较高。首先对孔板浮子流量计的流量计算公式进行了推导,并和经典锥管浮子流量计流量计算公式进行了比较,发现两者在形式上具有类似性,但还是有区别的。并给出了孔板浮子流量计的实验数据,证实理论分析是正确的。孔板浮子流量计的结构形式是可行的。     

A proof of the determinacy property of the data flow schema

Previous proofs of data flow determinacy proceeded indirectly and relied on results from abstract semantics. In this paper, a direct proof of the determinacy of data flow schema is given. This proof does not use high powered metamathematical theorems and consequently is accessible to all researchers in data flow, not just those intimately familiar with deep semantic results. Our proof proceeds in three stages. First, the data flow schema which contains instances of Link, Sink and Operator actors is proved to be determinate by reduction to the results of Karp and Miller (1966). Second, data flow schema containingSwitch actors, in addition to the above actors, are proved to be determinate. Finally, data flow schema which additionally contain Apply actors are proven to be determinate.     

井下液体流速检测仪的研制

介绍了一种井下低流速液体流速检测仪的研制 ,阐述了利用 2DCM硅磁敏二极管和波纹管制造井下液体低流速传感器的设计原理与结构 ,提出了用XTR10 4补偿电路和智能化检测系统的方案 ,实验结果表明 ,该项技术方案是可行的     

用法拉第罩传感器测量气固两相流量

用法拉第罩传感器测量气固两相在稀相和密相输送中的流量.稀相输送试验是在法国Poitiers大学的试验台上进行的.密相输送是在东南大学的试验台上试验的.在这些试验台上测得了电流值,以及这些电流值和两相质量流量的关系曲线.     

乳化沥青生产中的流量测量

本文讨论了靶式流量计在乳化沥青生产的流量测量中的有关问题，介绍了如何选择、校验靶式流量计，给出了改变量程范围的一种新方法。     

TCP流竞争拥塞及拥塞链路的缓存需求研究

针对流竞争拥塞,提出了一种拥塞分析模型FCCM(flow-competing congestion model),给出了TCP竞争流在拥塞链路上的分布特性,推导了流竞争拥塞发生的条件,进而分析了在流竞争拥塞发生时,路由器为维持拥塞链路100%利用率所需的最小缓存.分析结果表明,当流数目不确定时,应对流竞争拥塞所需的缓存将不大于流数目确定时经典BSCL(buffer sizing for congested interact links)方案中的最小缓存需求.     

基于Anylogic的轨道交通换乘能力改进的研究

研究轨道交通换乘枢纽与市内其它交通方式的衔接与协调,是城市公共交通线网优化的主要内容之一。它能减少出行过程中的等待时间,缩短人们出行时间,提高公交服务质量,并保证客运交通的高效率,也能更好地促进城市轨道交通与其它交通方式的协调发展。以武汉地铁某换乘站研究对象,通过实地采集其基本设施的位置和数量、入站行人和出站行人的数量,并利用Anylogic仿真软件,建立站点的平面布置图空间模型和行人流程图。首先通过仿真软件仿真找出换乘客流瓶颈部位,其次分别对其提出改善建议并加以修改仿真模型。最终仿真结果表明,改善建议使得换乘站的换乘效率都得到提高。     

Simulation of air flow in the typical boiler windbox segments

Simulation of turbulent air flow distribution in CFBC furnace, wherein primary air is entrained through inlet duct system called windbox, is attempted through state of art CAD/CFD softwares. Establishment of flow in windbox channel, distributed plate nozzle and combustor is complicated, due to sharp turns and presence of several solid boundaries makes the fluid flow highly turbulent. Hence, the simulation process is aimed in different parts to understand the flow behavior in each of the component associated with windbox. Towards this, the present paper develops the basic understanding for airflow distribution in windbox channel, wherein air exit is considered only through 6×3 array of distributed plate nozzle bottom faces. This analysis also highlights that recirculation flow, at several locations of windbox channel/distributed plate nozzle, which aids to generate high pressures zones and severe turbulent fluctuations. These effects in turn leads to unequal air-flow at exit, which are unable to carry the incoming crashed coal particles and lime stones to furnace for efficient combustion.     

The dynamic stability of the flow in a meander channel

The meander channel is one of the most common channel patterns in nature.The characteristics of the flow and sediment in a meander channel which have significant effect on the development of watercourse are important subjects in river dynamics.The transition of the flow patterns in a meander channel concerns with the development mode of the channel pattern and the river regime including the generation conditions of the three-dimensional coherent vortex and secondary flow,the hierarchical scale of coherent v...     

硅集成液体流量传感器

本文介绍了硅集成液体流量传感器的结构、工作原理和新颖的背面敏感封装技术。理论和实验结果表明，这种传感器具有很高的灵敏度，特别适合于液体小流量的测量。     

电容层析成像系统仿真研究

本文采用自开发的有限元仿真软件包分析１２电极电容层析成像系统,实现了极板间电容值计算,灵敏场确定等功能,证实了径向电极具有使传感器敏感场分布趋向均匀的作用;同时采用所获得的灵敏场分布重建了管截面图像,所得结果和实际图像基本一致,从而证明仿真结果的正确性。     

The State of the Art in Flow Visualization: Dense and Texture-Based Techniques

Flow visualization has been a very attractive component of scientific visualization research for a long time. Usually very large multivariate datasets require processing. These datasets often consist of a large number of sample locations and several time steps. The steadily increasing performance of computers has recently become a driving factor for a reemergence in flow visualization research, especially in texture‐based techniques. In this paper, dense, texture‐based flow visualization techniques are discussed. This class of techniques attempts to provide a complete, dense representation of the flow field with high spatio‐temporal coherency. An attempt of categorizing closely related solutions is incorporated and presented. Fundamentals are shortly addressed as well as advantages and disadvantages of the methods.