未来航空润滑油基础油

介绍了未来航空涡轮发动机对润滑油性能的要求:在260,-54℃时,试样运动黏度分别大于1.0 mm2/s和小于15 000 mm2/s,热氧化安定性温度为260~427℃。该要求已超出了目前使用的酯类润滑油所能承受的最大极限。为了满足要求,需开发全氟聚醚、改性硅油、聚苯醚、C-型醚、氟醚三嗪及环三磷偶氮润滑油基础油,它们的使用温度依次为:-34~316,-60~260,5~288,-29~260,-30~343,-15~343℃。     

低渗透油田套管损坏机理分析及防治措施

在注水开发油田,油水井套管损坏是一种极为普遍的现象,但又各具特点.通过对鄯善油田套管损坏井的自身特点进行统计、归纳,深入分析低渗透砂岩油藏套管变形影响因素和作用机理,提出了套管损坏井的预防及相应治理措施.     

近10年中国润滑脂产量与品种构成的发展

基于对中国27个润滑脂生产厂的调查统计结果，综述了1992～2001年10年间中国润滑脂产量、生产规模、品种结构及包装形式的发展变化情况，展望了今后的发展趋势。     

硬质合金工具和异型产品的发展战略探讨

根据硬质合金异型产品和工具市场分析以及江西省的具体情况，提出了江西发展硬质合金异型产品和工具的基础条件、重点产品选择、发展步骤。认为江西应重点发展硬质合金棒材和孔加工工具，快步引进世界最先进的生产线和技术，采取跳跃式的发展战略，赶上世界先进水平。     

定容气田开发规划概算法

基于物质平衡方程、产能方程和递减方程的结合,提出了定容气田开发规划的概算法.该法可用于预测地层压力、井底流动压力、井口流动压力和稳产年限.实际应用表明,本文提供的方法是实用有效的.     

Energy efficiency, carbon emissions and economic development in Venezuela

Venezuela's vast natural resource base has largely shaped the nation's economic and energy-use patterns. Major opportunities exist for improving the efficiency of energy use in Venezuela and, consequently, restraining the growth of energy-related carbon emissions. This paper presents a detailed report of one potential development path for Venezuela and estimates the ensuing levels of energy demand and CO₂ emissions associated with pursuing this path through the year 2025. The results indicate that by adopting a development strategy that incorporates structural changes in the economy, fuel-switching measures and improved end-use efficiencies, Venezuela can introduce energy efficiency and carbon restraints as part of its economic development process.     

Racial and ethnic identity: Developmental perspectives and research.

Developmental research is reviewed to evaluate how race, ethnicity, racial identity, and ethnic identity are defined and investigated for minority populations. First reviewed is how these terms are used in developmental and counseling research. Early practices limited these terms to their demographic denotations (e.g., heritage), but more recent practices have expanded to include socially constructed connotations. Second, developmental research was used to evaluate key assumptions in theories of racial and ethnic identity development, with an emphasis on recent longitudinal studies. Research supports some, but not all, of these developmental predictions. Longitudinal research supported the progressive nature of ethnic and racial identity development and that exposure to racism appears to stimulate further identity development during adolescence. In contrast, available evidence does not support the claims of a developmental hierarchy for racial ideologies and that identity crises are normative. Adjustment was not predicted by a single racial or ethnic identity ideology, but research suggested that the adolescent's sociocultural identity and socialization should be tailored to the nature of the racial and ethnic context for development. Implications for counseling research and practice are offered. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Autolisp在开发V画面体视图自生成系统中的应用

介绍了近年来体视投影技术的应用及发展，并提出了用AutoCAD的内嵌开发工具Autolisp语言结合Visualisp中的对话框控制语言DCL来开发体视图自动生成系统的新思路．根据V画面体视投影原理，推导出了V画面体视变换矩阵．给出了该系统的程序流程框图及相应的功能模块．并将该系统的界面和基本功能进行了展示，从而为体视自生成技术的研究开辟了新的道路．     

南哨水电站拱坝体型设计

南哨水电站位于雷公山暴雨中心区， 洪水峰高量大， 水库基本无滞洪削峰， 由于坝址处河床深切而狭窄， 溢洪道作拱坝坝身表孔溢流短鼻坎挑流的布置。为使溢洪道既有较好的挑流消能效果， 又能达到控制大坝工程投资的双重目的， 将混凝土拱坝体型作了一反常规的设计布置， 即河床部分悬臂梁的上部向水库倒悬呈负坡， 岸边悬臂梁渐变为竖直呈正坡； 水平拱圈曲率由高到低逐渐变小， 而曲率半径则逐渐加大。拱坝的体型适应了溢洪道作高落差挑流鼻坎的布置， 使其溢洪舌远离坝脚， 经运行１３ 年来多次洪水的检验， 在下游不做消能防冲工程措施的情况下， 保证了大坝和下游两岸岩体的稳定安全， 而大坝和溢洪道运行状态良好。