抽油机井遥测技术

针对抽油机井位置分散、不利于管理和进行工况监测等问题,研制了抽油机井遥测系统。讨论了利用计算机技术对远程的多口油井的工作状况进行遥测、遥控,及实现高效率监测的途径,介绍了该系统的组成、结构、调试方法及运行方式,并通过现场应用对其进行了检验。该系统技术先进,性能可靠,安装方便,是实现油田生产自动化的重要手段之一。     

非地震方法油气勘探进展

对第65届EAEG年会上发表的20余篇讨论非地震地球物理勘探技术的论文进行了归纳和总结，概要了非地震地球物理勘探技术，特别是电法在油气勘探应用方面的主要进展；介绍了垂直电流测深法、油气藏的直接探测与评价、高速层下成像、以及电法和重力勘探方法的应用史例等。     

KY50—728型控制棒位置指示系统的研制

本文介绍了一种较为新颖的控制棒位置指示系统,它适用于压水型反应堆以及压水型核电站。     

Coherence & autonomy: issues in the evaluation of an open learning project

Abstract  This paper will elaborate some of the key areas of interest in the evaluation of the JITOL, a project funded under the European Community DELTA initiative. The purpose of the JITOL (Just in Time Open Learning) project is to develop and evaluate a learning environment for the professional development of individuals. The environment is based upon information technology consisting of telematic network linking and making available computer resources, including data and knowledge bases, and using conferencing and communications software to facilitate access to human tutors and co-learners.
The three domains in which testing and validation of the JITOL model will take place represent areas in which real user/learner interest is already evident. From the point of view of evaluation, the JITOL project is characterized in such a way that it raises some particular challenges.     

Principles and procedures of the LRAM approach to information systems risk analysis and management

Risk assessment methods vary in nature and depth. Their application to the evaluation of information security issues should be decided on the basis of their capability to provide answers to the fundamental questions concerning the design and implementation of security controls in specific information systems. Information systems risk analysis is discussed as a means of providing an objectively based approach for assessing and managing risk. As a decision making and risk assessment tool, rigorous risk analysis is not only capable of identifying potential losses that could be unacceptable for a given system, but it can be used to determine which specific security controls and counter measures can be effective and justifiable by management-set criteria.The Livermore Risk Analysis Methodology (LRAM) was developed in accord with these principles. Its model and procedures, from the identification of valuable assets to the prioritization and budgeting of proposed controls, are examined and discussed both from the technical and from the decision making/risk management perspectives.     

含表面活性剂的金属指示剂体系

本文综述了含表面活性剂的金属指示剂体系的特性及其在配合滴定中的应用.     

A cryogenic level indicator using a voltage controlled oscillator

A cryogenic level indicator, which may be used with different types of sensors (viz diodes, carbon germanium resistors etc) and for all kinds of liquid cryogens is described. The indication is given by a 2 W audio alarm. The alarm sounds as soon as the sensor is out of liquid cryogen by about 2 mm.     

基于集成ELM的锂离子电池充电截止电压下的SOC和SOH联合估计

充电截止电压是大多数电动汽车用户充电都会经历的电压点。针对传统安时积分法忽略初始容量误差和电池老化等一系列待优化的问题,提出了双层集成极限学习机(extreme learning machine, ELM)算法,实现锂离子电池充电截止电压下的荷电状态(state of charge, SOC)和健康状态(state of health, SOH)联合估计。首先,提取易测的电池健康特征(health indicator, HI),采用集成极限学习机映射HI及充电所需时间与SOH之间的关系。其次,用测得的HI估计难以在线测量的充电所需时间,对充电截止电压下安时积分法的SOC进行在线修正。该方法充分考虑了电动汽车用户初始充电状态的不确定性,指导电动汽车用户合理充电。此外,通过选择合适的集成ELM模型集成度,解决了单个ELM模型输出不稳定的问题。最后,选用NASA和CALCE数据集进行实验验证。验证结果表明,锂离子电池充电截止电压下SOC的估计均方根误差均小于1.5%,集成ELM相比于其他常见算法具有较高的训练、测试精度和较短的预测时间。     

基于熵值法的省域自主创新能力评价与分析

首先建立区域自主创新能力评价指标体系,然后利用熵值法确定指标权重,运用简单线性加权法对2010年中国大陆31个省、市、自治区区域自主创新能力进行评价,对评价结果进行比较分析,明确各地区自主创新能力的优势和劣势。评价结果表明中国省级区域的区域自主创新能力地域差异化明显,就总体排名来看,呈现东部地区强、西部地区弱特征,由东部沿海向中、西部内陆逐渐递减。东部地区的区域自主创新能力最强,其次是东北地区和中部地区,西部地区较弱。     

城市客运交通枢纽建设时序优化方法

为提高城市客运交通枢纽建设时序决策的科学性,最大限度地发挥交通枢纽投资的社会效益,提出客运交通枢纽规划方案建设时序确定方法。定义了区位重要度、客流重要度、节点重要度和综合重要度概念,作为确定枢纽建设时序的依据。利用动态优化流程确定枢纽建设时序方案。以北京市客运交通枢纽规划方案为例进行枢纽建设时序分析,说明该方法的应用流程。