非线性干涉滤光片开关特性及逻辑功能

应用干涉滤光片作为一种光学双稳器件,演示了光学逻辑开关功能。     

高速公路全程信息服务系统的研究

针对高速公路沿线紧急救助电话难以维护管理以及行驶车辆难以获得信息服务的问题，提出了一种基于数据网络和GSM通信网络平台的紧急救助与信息服务模式-“交通信息呼叫中心”（Traffic Call Cencer)。呼叫中心采用GSM通信平台与路网内的车辆传输信息，有效地解决了用户紧急呼救与实时请求服务的信息交互问题，文中还给出了一种技术方案。     

界面流法计算反应堆六角形燃料组件中子通量密度分布

利用界面流法计算两维六角形轻水堆燃料组件中子通量密度分布。子区内中子源在空间上采用二次分布近似，还考虑了六角形组件周边水隙对组件内中子通量密度的影响。根据提出的模型，编制了TPHEX－E程序，并对一些轻水堆六角形组件问题作了计算，计算结果与蒙特卡罗方法计算结果进行了比较，符合良好。本程序可用于六角形轻水堆燃料组件计算。     

Trace elements in particles of motor vehicle exhaust in Shanghai

A nuclear microprobe with high spatial resolution and high analytical sensitivity was applied to analyze trace elements,especially lead,in vehicle exhaust of Shanghai city.The result shows that the chemical composition and its corresponding x-ray relative intensity are different among different vehicle exhausts.There are many kinds of metal elements in particles of vehicle exhaust.most are harmful to people,such as Ti,Cr,Mn,Pb,etc.We found that the lead concentration was 6820μg/g and the bromine concentration was 5300μg/g in the exhaust from Santana using leaded gasoline(SULG).which is higher than any other kinds of vehicle exhausts.We have also detected the minimum lead in the particles of unleaded gasoline and its content varies from one to another.Its mean concentration was 450μg/g and the highest reached 6210μg/g.The unleaded gasoline‘s Pb existed in the whole particle while the leaded gasoline‘s enriched in the surface of the particle and was more harmful to the human beings.     

长江重要堤防的防渗问题

长江重要堤防主要座落在第四纪冲积平原上，且历史悠久。据史料记载，荆江大堤始建于东晋时期，距今巳1600多年。长江中下游堤防多数也有数百年历史，系经历代不断加高培厚、由小垸联成大圩、溃决后再修复逐渐扩大形成。目前存在的主要问题是：①基础渗流导致渗透破坏；②堤身隐患多，主要是土质杂乱不均、填筑质量差（压实不匀）、断面杂乱、生物洞穴以及人类活动残迹等；③河岸崩塌。解决的办法主要采用防渗墙截渗。重点介绍了新技术、新工艺、新材料在防渗工程中的应用。对其它类似工程有指导借鉴作用。     

Influence of the ethylene–(methacrylic acid)–Zn2+ ionomer on the thermal and mechanical properties of blends of poly(propylene) (PP)/ethylene–(vinyl alcohol) copolymer (EVOH)

The thermal and mechanical properties and the morphologies of blends of poly(propylene) (PP) and an ethylene–(vinyl alcohol) copolymer (EVOH) and of blends of PP/EVOH/ethylene–(methacrylic acid)–Zn²⁺ ionomer were studied to establish the influence of the ionomer addition on the compatibilization of PP/EVOH blends and on their properties. The oxygen transmission rate (O₂TR) values of the blends were measured as well. PP and EVOH are initially incompatible as was determined by tensile tests and scanning electronic microscopy. Addition of the ionomer Zn²⁺ led to good compatibility and mechanical behaviour was improved in all blends. The mechanical properties on extruded films were studied for 90/10 and 80/20 w/w PP/EVOH blends compatibilized with 10 % of ionomer Zn²⁺. These experiments have shown that the tensile properties are better than in the injection‐moulded samples. The stretching during the extrusion improved the compatibility of the blends, diminishing the size of EVOH domains and enhancing their distribution in the PP matrix. As was to be expected, the EVOH improved the oxygen permeation of the films, even in compatibilized blends. Copyright © 2004 Society of Chemical Industry     

Comparing word fragment completion and cued recall with letter cues.

Cued recall with word stems as cues and fragment completion rely on different types of letter cues and also differ in the explicit–implicit nature of the retrieval orientation. Despite these differences, variables effective in one task may be effective in the other because both rely on letter cues. Two variables known to affect cued recall were manipulated: Lexical set size (number of words that fit the letter cue) and meaning set size (number of associates generated to the studied words). Across four experiments, subjects in each task were less likely to recover targets from larger lexical sets. However, meaning set size affected cued recall but not fragment completion. These results indicate that fragment completion and letter-cued recall are based on lexical search but that cued recall also involves a semantic search component. Furthermore, type of retrieval cue had a greater effect than type of retrieval orientation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

海底天然气管道投产案例分析

为防止形成天然气水合物，天然气管道在投产前必须彻底干燥。海底管道距离长，不能分段施工，多采用清管器组加干燥剂的作业方案，这就存在清管器组的运行控制、卡球和窜漏等问题，作业难度高、风险大。针对我国海底输气管道投产前干燥施工过程中出现的憋压、卡球、窜漏和清管器磨损等问题进行了分析，说明了发生问题的原因。对比研究了不同管道干燥方案的优缺点、清管器使用的合理性、干燥剂使用效果和干燥指标的制定与监测方法等问题。在此基础上， 提出了针对海底天然气管道的凝胶、干燥剂和多盘清管器的组合干燥方案。该方案能有效解决密封、卡球和凝胶滞留等问题，并能确保施工质量，对类似工程有借鉴意义。