抽水蓄能电站建设对经济拉动效应的实证研究

抽水蓄能电站建设可以为项目建设区域带来相应的经济效应．为了科学定量地分析这一经济拉动效应,提出了选用投入产出模型作为抽水蓄能电站建设投资在生产环节经济拉动效应的测算方法,采用了边际消费倾向作为在消费环节由于抽水蓄能电站建设投资使居民收入增加导致消费需求增加而产生乘数效应的计算方法,并对某抽水蓄能电站建设期间为项目建设区域带来的经济效应进行了定量测算．该研究是关于抽水蓄能电站等基础设施建设对经济拉动效应展开定量研究进行的一次有益尝试．     

图灵机扫描子串技术(英文)

某些语言中的所有句子必须包含有或者不能包含有特定的子串,或者需要将语言中句子所包含的子串进行替换。传统的方法是利用图灵机的存储技术处理该类语言。该文提出了一种图灵机扫描子串技术的新方法,即将特定子串当作一个整体,将扫描一个符号的图灵机的多个状态转换函数合并为一个,使得图灵机一次可以扫描多个符号,但图灵机的读/写头仅移动一个单元。该方法简便且有效,通过实例证明了扫描多个符号的图灵机与扫描一个符号的图灵机是等价的。     

喷雾式天然气水合物储气系统的实验研究

利用自行设计的喷雾式天然气水合物储气实验系统,研究了喷雾强化措施下的水合物制备所形成水合物的形态特征,考察在不同初始压力和初始温度条件下水合物形成过程的压力变化特性及其对水合物生成速率和生成量的影响,并且分析和比较了间歇进气与连续进气两种不同进气方式下水合物的生成特性.实验结果表明,初始压力越高、初始温度越低,反应生成水合物的速率越快,生成的量越多;在进气方式比较方面,连续式进气生成水合物的速率比间歇式进气要快,能耗要低,因而连续式进气比间歇式进气具有更好的速率和效率.     

贮存电荷对非线性逻辑门开关通断速度的影响

从Ｅｂｅｒｓ－Ｍｏｌｌ方程组出发,建立在矩形脉冲激励下的ＢＪＴ反相器的非线性耦合微分方程,介绍了ＭＡＴＨ程序语言在求解门开关电路的非线性耦合微分方程中的具体应用,说明中性区和空间电荷层内贮存电荷对逻辑门开关速度的影响。     

贮氢材料工作原理的初步探讨

本文根据热力学定律对贮氢材料的工作原理作了初步探讨,计算了部分贮氢材料的△H和△S值,介绍了钛系、镧系、镁系三大系列贮氢材料的基本物理和化学性质。     

Characterization of Historical Methane Occurrence Frequencies from U.S. Underground Natural Gas Storage Facilities with Implications for Risk Management,Operations, and Regulatory Policy

Defining a baseline for the frequency of occurrences at underground natural gas storage facilities is critical to maintaining safe operation and to the development of appropriate risk management plans and regulatory approaches. Currently used frequency-estimation methods are reviewed and broadened in this article to include critical factors of cause, severity, and uncertainty that contribute to risk. A Bayesian probabilistic analysis characterizes the aleatoric historical occurrence frequencies given imperfect sampling. Frequencies for the three main storage facility types in the United States (depleted oil-and-gas field storage, aquifer storage, solution-mined salt cavern storage) are generally on the order of 3 to 9 × 10^–2 occurrences, of all causes (surface, well integrity, subsurface integrity) and severities (nuisance, serious, catastrophic), per facility-year. Loss of well integrity is associated with many, but not all, occurrences either within the subsurface or from there up to the surface. The probability of one serious or catastrophic leakage occurrence to the ground surface within the next 10 years, assuming constant number of facilities, is approximately 0.1–0.3% for any facility type. Storage operators and industry regulators can use occurrence frequencies, their associated probabilities and uncertainties, and forecasts of severity magnitudes to better prioritize resources, establish a baseline against which progress toward achieving a reduction target could be measured, and develop more effective mitigation/monitoring/reduction programs in a risk management plan.     

Project Feedback Loops: Visualizing Collection Evaluation Decisions

ABSTRACT

In 2016, a collection assessment project evaluated print serials and book collections at Johns Hopkins University in preparation for an upcoming renovation of the Eisenhower Library. Project metrics provided librarians with both goals and measures of success that varied by humanities, social sciences, and science and engineering—such as estimated number of volumes, decision type, and the percentage of serials staying or moving out of the building. A feedback loop with data visualizations helped reduce anxiety and improve communication across library departments by illustrating volume estimates, linear feet, and shelf height by decision type. Key takeaways include lessons learned about necessary data proficiency for academic librarians and the need for better data from our library software and applications to facilitate future collection evaluation projects for weeding off-site serials.     

车用蓄电池早期损坏的原因及预防

分析了车用蓄电池早期损坏的原因，提出了相应的预防措施。     

考虑井筒储存和表皮效应的变流率问题的精确解

本文用较新的观点，建立了无限大均质地层(考虑井筒储存和表皮效应)中单井系统变流率问题的压力降分布的数学模型，利用Laplace变换法，解出了井底压力变化的精确解析解;并将其无因次化，以便于在实际中用来制作试井分析样板曲线图，并简要地指出了实际应用此精确解的方法。     

综合性大学图书馆外文文献信息服务刍议

根据合并后的内蒙古民族大学的性质和特点 ,就综合性大学图书馆外文文献信息资源共享、建立特色馆藏、做好文献翻译、开展文献检索教学、实行对外开放和为地方经济建设服务等问题 ,做了初步探讨