小浪底水利枢纽工程防渗墙施工技术

黄河小浪底水利枢纽工程主坝防渗墙上注重枯水围堰防渗墙，是目前国内较大规模的地下防渗墙工程。工程施工采用了多种新方法、新技术，如：在国内首次采用先进的双轮铣和机械抓斗组合的成槽设备和技术，在深厚覆盖层和复杂的河床地形条件下，确保了槽孔的垂直度和成墙质量，加快了工程进度；在国内首次采用横向槽孔填充塑性混凝保护下的平板接头的墙段连接形式，使用高压旋喷灌浆对“老虎嘴”的封堵方案，采用缓凝高强混凝土材料新工     

注塑机模板断裂的原因及预防

分析各种注塑机模板断裂的主要原因，介绍如何选用注塑机，以及在使用如何防止注塑机模板的断裂。     

冰箱瓶架注射模设计

冰箱瓶架属于透明盒类塑件，侧壁具有反向拔模特征。介绍了该塑件注射模的结构设计和工作过程。实践证明该模具结构合理，操作方便，生产效率高。     

一种典型的底盖注射模设计

分析了一种底盖的结构工艺特点，重点分析了底盖注射模结构的设计过程。经过生产实践证明，该模具开合川页畅，完全符合设计要求，适于大批量生产。     

On-line control flow error detection using relationship signatures among basic blocks

Computer systems operating in space environment are subject to different radiation phenomena, whose effects may lead to a control flow fault occurring in software system, which can cause unpredictable behaviors of computer-based systems. According to the specialty of space environment, We propose a technique called RSCFC (Relationship Signatures for Control Flow Checking) which is based on the partition of programs into basic blocks. Firstly, it exploits the relationship among the blocks, then assigns a signature, into which the relationship is coded, to each basic block. Control flow faults are detected through taking AND operation between the run-time signature and the location info of the current block with extra instructions induced at the beginning and the end of each block. A fault injection experiment was performed with several C benchmark programs. The result suggests that about 33% (20.7-68.8%) of the injected branching faults produced undetected incorrect outputs without RSCFC; however, with RSCFC, the above number declines to 11% (2.8-20.4%). Compared with previous techniques, RSCFC has the characteristics of both high fault coverage and low memory and performance overhead.     

粒子冲击钻井系统研究初探

介绍了粒子冲击钻井系统的原理及优势,并对美国Particle Drilling Technologies,Inc.粒子冲击钻井系统的相关技术和现场试验情况做了论述,结合国内的研究成果,阐述了粒子冲击钻井系统的3大组成部分:粒子冲击钻井钻头、粒子注入系统和粒子回收处理系统的组成及其相应的工艺流程。粒子冲击钻井系统及相关项目的研究,为国内深井、超深井钻井速度的进一步提高提供了一种全新的思路和办法。     

邯钢2000 m3高炉喷煤系统的设计

邯钢2000m^3高炉叶煤系统设计采用布袋收粉器、浓相输送、炉前分配器等先进技术，设计喷吹能力为200kg/t，目前煤比已到150kg/t。该系统具有固气比高、耗气量少、速度低、控制精度高等特点。     

剪切控制取向注射成型概述

对比了剪切控制取向注射成型（ＳＣＯＲＩＭ）与普通注射成型（ＣＩＭ）的基本原理，剪切控制技术（ＳＣＯＴ），可消除制品熔接缝，改善外观质量，还可消除内在应力和空隙等缺陷，提高制品内在质量。     

A sensitive solid-phase microextraction/gas chromatography-based procedure for determining pentachlorophenol in food

A new method for the determination of pentachlorophenol (PCP) in different foods was developed using capillary gas chromatography (GC) and microwave induced-plasma atomic emission spectrometry (MIP-AED). The analyte is first derivatized and then extracted and pre-concentrated by solid-phase microextraction (SPME) in headspace (HS) mode. A clear matrix effect was found for the different samples investigated, so that standard addition was required for quantification. Detection limits of 0.03-6.0 ng g^-1 were obtained, depending on the sample analysed. The method gave recoveries of 81-109% from spiked samples. Concentration levels of PCP ranged from 0.3 to 1.5 ng g^-1 were found in honey, but no PCP was detected in other samples.     

注塑过程的数值模拟

针对塑料熔体的特性建立数学模型，并根据实际情况对有限元模型进行简化：采用大型有限元分析软件ANSYS对注塑模的瞬态注塑过程进行数值模拟，得到塑料熔体在型腔中的速度分布和压力分布；通过不同工艺参数条件下的结果进行对照分析，可以对工艺参数做出合理的选择；实验表明，该数值模拟法确实能对塑料注射过程的参数进行优化，为设计塑料注射过程工艺参数提供了一种行之有效的途径。