宫颈癌Ⅱ_b患者术中大剂量放疗前后T细胞亚群水平的变化

目的　探讨术中放疗对宫颈癌Ⅱb 患者细胞免疫功能的影响。方法　在放疗前后,用流式细胞技术检测61 例宫颈癌Ⅱb 患者T淋巴细胞亚群水平(包括CD4、CD8、CD4/CD8)的变化。其中28 例行术中放疗(IROT),33 例行单纯放疗(SR),并与20例正常人作对照。结果　单纯放疗组和术中放疗组在放疗前CD4,CD4/CD8 均明显低于正常组(P<0.001),而前两组间CD4、CD8、CD4/CD8 无显著性差异;放疗后两组CD4、CD4/CD8 较放疗前均下降,CD8 上升,单纯放疗组CD4、CD4/CD8 明显低于术中放疗组(P<0.05)。结论　与单纯放疗相比,宫颈癌术中大剂量放疗对患者免疫系统的影响较轻,有利于机体的恢复。     

基于极大似然估计的路段交通流量预测

基于对交通流量预测存在的问题的分析，用极大似然估计法对路段交通流量进行预测．这种方法的实质，是将连续的观测时段的上游观测量作为自变量，用极大似然估计法估计出观测量与下游预测量之间的关系，从而预测交通流量．实例结果表明，预测值与实际值的最大误差率为5.76％。     

列流线偏移描绘自动化

基于图论理论分析了列流图的组成特性,以解决列流线折点自动搜索问题.提出列流线折点搜索算法和列流线偏移描绘算法.采用基于节点信息表绘制列流图.开发了列流图自动生成数据库系统.用实例表明了算法及软件有效性和可行性.     

A Closed Form Solution to Segment 3D Motion Using Straight-line Optical Flow

A closed form solution to the problem of segmenting multiple 3D motion models was proposed fromstraight-line optical flow. It introduced the multibody line optical flow constraint (MLOFC), a polynomial equation relating motion models and line parameters. The motion models can be obtained analytically as the derivative of the MLOFC at the corresponding line measurement, without knowing the motion model associated with that line. Experiments on real and synthetic sequences were also presented.     

Optimizing signals for arterials experiencing heavy mixed scooter-vehicle flows

Recognizing the increasing popularity of scooters among urban commuters in developing countries and the significant impacts of their dynamic maneuverability on the progression of mixed traffic, this study presents a simulation-based signal optimization model for arterials experiencing heavy scooter-vehicle flows. The proposed model consists of a macroscopic simulation and a signal optimization module, where the former functions to capture the interactions between scooter and passenger-car flows over the process of discharging, propagation, and formation of intersection queues. The latter offers a specially-designed algorithm to search for the optimal signal plan and arterial offsets, based on the complex departure and arrival patterns of mixed flows estimated with the simulation module. To account for scooters’ unique parallel moving and queue patterns in a travel lane, the proposed signal module has adopted the sub-lane concept in estimating the mixed-flow queue distribution across lanes and their discharging flow rates. The results of extensive experimental analyses with various mixed-flow scenarios confirm that the proposed model offers the potential for signal design for arterials plagued by heavy scooter-vehicle mixed flows.     

基于Pro/E塑料顾问分析的塑料盒盖注射模具设计

针对传统模具设计的弊端,提出了采用模流分析技术对模具进行优化设计的思想。以Pro/E塑料顾问为平台,以塑料盒盖零件为实例,对其浇口位置进行计算机模拟分析,并在此基础上对塑料产品进行注射成型工艺模拟分析。综合分析结果有针对性地优化模具设计方案,避免了设计中的盲目性,提高了塑料产品的成型质量,减少了缺陷的产生,降低了生产成本,缩短了生产周期。     

新形势下提升高校党政办公室工作水平初探

文章首先阐述了办公室在高校发展建设中的地位和作用,并从工作任务繁重、工作创新不够、人员专业化程度不高等方面指出了当前高校办公室存在的主要问题,从树立"以人为本"服务理念、打造专业化管理队伍、建立规范的管理制度、构建现代化管理平台等方面提出高校办公室的建设策略     

中外反恐立法的比较分析与完善

当前,恐怖活动犯罪的社会危害性日益凸显,威胁着全球范围内的和平稳定秩序。我国一直在国际法层面和国内法层面对反恐立法进行探索,尤其是2011年《关于加强反恐怖工作的决定》的出台,意味着我国已经确定了以此决定为核心的独立式立法模式,我国反恐立法水平达到了新的高度。与国外相比,我国在立法内容、罪名设置、相关程序法等方面仍存在诸多不足。本文将通过对国外反恐立法内容比较总结,在本土化资源话语体系下,对外国立法经验进行选择性借鉴。     

考虑客流空间分布的地铁列车节能时刻表优化方法

客流变化引起的列车质量变化是影响地铁列车能耗与节能运行的重要因素之一. 本文考虑地铁线路客流空间分布差异，研究耗散型再生制动能利用方式下的列车节能时刻表优化方法. 结合各区间载荷差异和列车运动方程，建立以净能耗最小为目标的时刻表优化模型，通过适度优化计划停站时间、区间运行时间和折返时间协同多列车牵引、巡航、惰行和制动过程的时空分布，设计二分法和粒子群算法对模型求解. 以北京地铁某线路进行实例研究，结果表明，优化模型能有效协同多列车的节能运行，考虑客流空间分布差异比假定列车载荷为常数能进一步提升节能效果.     

System optimal dynamic traffic assignment: Properties and solution procedures in the case of a many-to-one network

Thanks to its high dimensionality and a usually non-convex constraint set, system optimal dynamic traffic assignment remains one of the most challenging problems in transportation research. This paper identifies two fundamental properties of the problem and uses them to design an efficient solution procedure. We first show that the non-convexity of the problem can be circumvented by first solving a relaxed problem and then applying a traffic holding elimination procedure to obtain the solution(s) of the original problem. To efficiently solve the relaxed problem, we explore the relationship between the relaxed problems based on different traffic flow models (PQ, SQ, CTM) and a minimal cost flow (MCF) problem for a special space-expansion network. It is shown that all the four problem formulations produce the same minimal system cost and share one common solution which does not involve inside queues in the network. Efficient solution algorithms such as the network simplex method can be applied to solve the MCF problem and identify such an optimal traffic pattern. Numerical examples are also presented to demonstrate the efficiency of the proposed solution procedure.