IGBT无损吸收网络的设计

提出一种模块化IGBT无损吸收网络，介绍了其缓冲吸收原理、元件参数计算及一些注意事项。     

GZF高压注水井口测试防喷器的研究与应用

针对高压 (2 5MPa以上 )分层注水井进行井下分层流量测试时 ,上顶力大 ,仪器下井困难 ,井口喷漏严重 ,测试工人劳动强度大等问题 ,研制了GZF高压注水测试井口防喷器。这种防喷器采用节流降压原理进行设计 ,主要由自动输送钢丝装置、节流降压密封装置和防喷管总成 3部分组成 ,是一种用于高压注水井下测试和投捞调配的井口辅助工具 ,具有井口防喷和输送钢丝两大功能。现场试验证明 ,该防喷器结构紧凑、安装使用方便、密封可靠 ,使用井口压力可达 35MPa,自动化程度高 ,可保证仪器顺利下井 ,同时还将高空人力手送钢丝改为远距离自动输送 ,操作灵活、简单安全。特别适用于低渗高压分层注水井的井下测试和投捞。     

应用吸水剖面资料确定吸水层动态残余油饱和度的方法

基于岩心长期注水试验资料，认识到吸水层的残余油饱和度的变化是一个缓慢减小的过程。文章给出了动态残余油饱和度的概念，提出了利用吸水剖面测井资料来确定动态残余油饱和度的方法。通过现场实测资料的解释，建立了动态残余油饱和度与吸水层每米累计吸水量的定量关系，为剩余油分布研究提供新思路。     

Zeolite synthesis from paper sludge ash with addition of diatomite

BACKGROUND: This study aimed to investigate the synthesis of zeolites from paper sludge ash (PSA) with added diatomite to remove both NH₄⁺ and PO₄^3? for water purification. The PSA had low Si and significant Ca contents. Four types of diatomite: white (T‐W) and brown (T‐B) from deposits of marine origin in Takanosu, and white (S‐W) and gray (S‐G) from lacustrine deposits in Shonai, were added to NaOH solution to increase the Si content and thereby synthesize zeolites with high cation exchange capacity (CEC). RESULTS: The order of the amounts of Si extracted from the diatomite to the alkali solution was S‐W > T‐W = T‐B > S‐G, which correlates with the amorphous SiO₂ content of diatomite. The original ash without addition of diatomite yielded hydroxysodalite with CEC of about 1.0 mmol g^?1. For all samples, the addition of diatomite to the solution yielded zeolite‐P with a higher CEC, but the addition of excess Si inhibited the synthesis of zeolite‐P, and the CEC of the product was low. A product with high CEC including zeolite‐P was obtained in a solution with around 500 mmol L^?1 of Si concentration, and had the ability to remove both NH₄⁺ and PO₄^3?. CONCLUSION: Diatomite has the potential for used as an additive for the synthesis of high CEC zeolite from PSA. The product with zeolite‐P exhibited relatively high CEC, capacity for NH₄⁺ uptake, and the ability to remove PO₄^3? by precipitation, which is preferable for water purification applications. Copyright © 2008 Society of Chemical Industry     

内燃机车临时补水设备的设计与应用

针对内燃机车“途中缺水”故障 ,设计并安装临时补水设备 ,解决了电化区段临时补水的问题 ,满足了内燃机车“不停车、不停机”即可补水的要求。     

"I know, you know": Epistemic egocentrism in children and adults.

This article reviews the evidence and theory pertaining to a form of perspective-taking failure--a difficulty in setting aside the privileged information that one knows to be unavailable to another party. The authors argue that this bias (epistemic egocentrism, or EE) is a general feature of human cognition and has been tapped by 2 independent and largely uncommunicating research traditions: the theory-of-mind tradition in developmental psychology and, with more sensitive probes, the "heuristics and biases" tradition in the psychology of human judgment. This article sets the stage for facilitating communication between these traditions as well as for the recognition of EE's breadth and potential interdisciplinary significance. The authors propose a life-span account and a tentative taxonomy of EE; and they highlight the interdisciplinary significance of EE by discussing its implications for normative ethics. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

英台地区天然水驱油藏的开发特点及稳产技术

掌握边底水运动规律，控制并利用活跃的边底水能量，是成功开发天然水驱油藏的关键。英台地区的英台、四方坨子和一棵树等三个油田均为天然水驱油藏，天然能量充足。油藏投入开发后初期含水较高，含水上升极快，造成产油量大幅度递减。针对其开发特点，适时采用大泵、电潜泵提液强采，通过大量补孔层间接替以及加密调整和扩边等稳产技术措施，确保了油藏以3％-5％的采油速度长期稳产，水驱采收率高达50％以上。     

轧后穿水冷却工艺对棒材组织性能的影响

针对轧机产量提高后冷床冷却能力不足的问题 ,研制开发了棒材轧后穿水冷却技术。通过对小规格 2 0MnSiV热轧带肋钢筋进行轧后穿水冷却 ,钢材上冷床温度降低了 90～ 110℃ ,提高了产品质量 ,改善了各项力学性能 ,抗拉强度平均提高了 3 5～ 40MPa ,钢材性能合格率由 97.5 %提高到了 99.6% ,解决了冷床冷却能力不足、制约生产的瓶颈问题。     

纳秒级上升时间的高压脉冲群电源

按照IEC 61000-4-4/GB 17626.4—1998的要求，首先应用PSPICE仿真确定电路中各元件的参数值，然后基于拉普拉斯变换用MATLAB求解二阶电路验证各元件参数。在此基础上研制了一台以开关电源作为高压直流电源、以氢闸流管作为主控开关的脉冲群电源。该电源体积小、重量轻、效率高、成本低廉。试验结果表明，其输出信号符合标准要求，可用于快速瞬变脉冲群抗扰度试验。     

朔州桑干河流域灌区的改革实践

在社会主义市场经济条件下,朔州市桑干河流域原有的分市县管辖的8处大中型灌区的管理体制和运行机制已不适应水管单位生存发展的需求.从解决长期以来水管单位面临的诸多实际问题出发,按照程序报请各级政府批准后,原分散管理的8处灌区统一划归桑干河水利管理局管理.该改革以理顺关系、设置机构为突破口,建立起了以流域为建制的新型水管体制,在运行过程中不断探索和解决改革中出现的新情况和新问题,有利于维护水资源的可持续利用和生态与环境的协调发展.