A PULSATION-TYPE PORTAL PUMP IN THE TREATMENT OF THE PORTAL HYPERTENTION

Ｌｉｖｅｒｃｉｒｒｈｏｓｉｓ ,ａｗｏｒｌｄｗｉｄｅｈｅａｌｔｈ ｐｒｏｂｌｅｍ ,ｄｅｃｒｅａｓｅｓｔｈｅｂｌｏｏｄｆｌｏｗｔｈｒｏｕｇｈｔｈｅｌｉｖｅｒ .Ｔｈｉｓｉｎｔｕｒｎｌｅａｄｓｔｏｄａｎｇｅｒｏｕｓ ｐｏｒｔａｌｈｙｐｅｒｔｅｎｓｉｏｎａｎｄｄｅｃｒｅａｓｅｄｍｅｔａｂｏｌｉｃｆｕｎｃｔｉｏｎｗｉｔｈｉｎｔｈｅｌｉｖｅｒ .Ｔｈｅｓｕｒｇｉｃａｌｔｈｅｒａｐｅｕｔｉｃｔｒｅａｔｍｅｎｔｓｎｏｗａｄａｙｓｃａｎ’ｔｓｏｌｖｅｔｈｅｐｒｏｂｌｅｍｓｕｃｃｅｓｓｆｕｌｌｙ .Ｔｈｅｄａｎｇｅｒｏｆｂ…     

孕酮对正常生育和不明原因不育男性精子-仓鼠卵穿透试验的作用

目的　比较正常生育男性和不明原因男性不育症患者精子的受精能力及其对孕酮 (P)的反应性。方法　选择10例不明原因男性不育症患者和 10例正常生育男性 ,在上游后精子悬液中加入P 10 μmol·L -1,并体外获能 2h。采用超排卵法制备仓鼠卵细胞 ,将精子与卵子体外受精 3h后观察卵子受精率 (FR)与受精指数 (FI)。结果　上游后精子与P孵育能显著提高生育组的FR(P <0 .0 1) ,但不能增加不育组的FR ;生育组FR显著高于不育组FR(P <0 .0 0 1)。P能显著提高生育组的FI (P <0 .0 1) ,但不能增加不育组的FI;生育组FI显著高于不育组FI (P <0 .0 1)。结论　P能增强正常生育男性精子的受精能力 ;精子对孕酮的反应性降低可能是不明原因男性不育症的病因之一     

An optimal model-based trajectory following architecture synthesising the lateral adaptive preview strategy and longitudinal velocity planning for highly automated vehicle

Automated driving has received a broad of attentions from the academia and industry, since it is effective to greatly reduce the severity of potential traffic accidents and achieve the ultimate automobile safety and comfort. This paper presents an optimal model-based trajectory following architecture for highly automated vehicle in its driving tasks such as automated guidance or lane keeping, which includes a velocity-planning module, a steering controller and a velocity-tracking controller. The velocity-planning module considering the optimal time-consuming and passenger comforts simultaneously could generate a smooth velocity profile. The robust sliding mode control (SMC) steering controller with adaptive preview time strategy could not only track the target path well, but also avoid a big lateral acceleration occurred in its path-tracking progress due to a fuzzy-adaptive preview time mechanism introduced. In addition, an SMC controller with input–output linearisation method for velocity tracking is built and validated. Simulation results show this trajectory following architecture are effective and feasible for high automated driving vehicle, comparing with the Driver-in-the-Loop simulations performed by an experienced driver and novice driver, respectively. The simulation results demonstrate that the present trajectory following architecture could plan a satisfying longitudinal speed profile, track the target path well and safely when dealing with different road geometry structure, it ensures a good time efficiency and driving comfort simultaneously.     

电泳过程车身结构变形仿真方法概述

涂装是车身产品制造中的一个重要工艺过程,电泳是涂装过程重要环节。在电泳过程中,由于液体冲击及车身自身运动,白车身会出现钣金变形、结构脱胶、固定点强度不足的情况,引发尺寸匹配不均匀、间隙过大的问题,严重影响用户视觉体验。本文综述了有限元法(Finite Element Method)与有限体积法(Finite Volume Method)的理论基础、多相流仿真分析方法及重叠网格技术理论及应用,分析了流固耦合仿真应用的国内外现状及电泳过程车身结构变形预期仿真方法可能存在的挑战。     

解释结构模型法(ISM)在物流业的顾客满意度指数中的应用研究

从我国物流业消费者购买决策过程的特点出发,确认物流业的顾客满意度影响因素和内容,运用解释结构模型方法对物流业的顾客满意度的内在作用机制进行了分析,并在此基础上建立了物流业的顾客满意度指数模型.     

高精度汽车安全带卷簧扭矩测试系统的开发

为方便、准确地测试汽车安全带卷簧的扭矩性能,以高性能数据采集卡 PCI-8602 为核心开发了系统硬件;以 VC6.0 为开发环境,采用 MFC 多文档-视图结构和多线程技术设计了人机交互、数据采集与控制等软件功能模块;对软件功能和系统精度进行了实测.结果表明,测试精度达到 0.001 N·m;测试系统满足汽车安全带卷簧扭矩测试的要求.     

基于SG105F的集成光电式液位传感器研制

集成式光电液位传感器采用发光/感光集成电路芯片(SG105F)有效地减小了传感器体积,采用磁传递结构实现了非接触式测量,能够准确监测液位状态,结构紧凑,轻便灵活,成本低廉,安装和维修方便,可用于一般液体,也可用于易燃易爆液体及强腐蚀性、高挥发性液体的液位测量.     

车站调车作业安全防护的新装备——调车机车信号和监控系统

DJK调车机车信号和监控系统通过对站场联锁等信息的采集，将整个站场的调车进路、调车信号、调车作业单、调车限制条件等信息通过无线信道传送到调车机车上，实现调车信号、调车进路及作业单等在机车上的实时显示，并结合列车监控装置实现对调车作业进行安全防护控制。该系统不仅能有效对调车作业进行安全防护，还可以通过系统记录的历史数据，分析事故原因，给安全管理提供依据。     

繁闹市区安装供水工程的施工——谈广州黄石东路安装DN800供水管工程

该文分析了在市区中心安装供水管道的过程及施工的特点,结合广州黄石东路安装DN800供水管工程实例描述工程施工的难点,可供同行参考。     

The relationships between e-shopping and store shopping in the shopping process of search goods

Internet facilitates hybrid shopping processes by enabling consumers to acquire information, experience product, and conduct transaction using different media (e.g., internet, store, and catalog) at different locations at different times. Although several studies have explored how internet transactions and store sales influence each other, few investigated transportation implications of the hybrid shopping process of single products. Using 540 internet users in the Minneapolis-St. Paul metropolitan area, USA, this study decomposed their shopping processes of a group of search goods (books, CDs, VCDs, videotapes, and album) to understand the relationships of e-shopping and store shopping. We found the media for product awareness, information search, and product trial are important predictors of transaction medium; and the awareness medium is the most important. Further, 17% of store buyers used internet for information search and/or product trial, and about 10% of internet buyers made trips to store to acquire information and/or experience product. The findings carry implications for marketing strategies and travel demand analysis.