TZJ40/2250拖挂钻机的研制

根据油田对钻井工程减少作业时间、提高移运速度和降低成本的需要,南阳二机石油装备(集团)有限公司综合了移动式钻机和橇装模块化钻机的结构特点和设计思想,以安全为主,高效和环保为补充,研制开发了TZJ40/2250拖挂钻机。钻机采用了半挂车行车制动、半挂车转向控制、液压盘式刹车和液力传动箱等关键技术,大大提高了钻机的自动化程度。出口和现场应用表明,该型钻机不仅具有结构简单、安全可靠和设计紧凑等优点,而且具有移运方便和使用范围广等不可比拟的优势。     

ＰＤＣ钻头布齿设计技术

合理的布齿是保证PDC钻头具有优良工作性能的关键。目前常用的PDC钻头布齿设计方法是图解调整法，该方法速度慢，设计工作烦琐，工作量大，效率低，欠灵活，而且有时会出现不必要的误差。讨论了PDC钻头布齿设计的特点，按切削原则设计了钻头冠部形状，并选择了合理的切削结构，为PDC钻头布齿计算机辅助设计软件提供了理论支撑。     

Denying History: Comment.

Comments on an article by Eidelson and Eidelson (see record 2003-03645-004) which made an important contribution, at a critical juncture, to the discussion of international conflicts by identifying core dimensions that allow for the systematic examination of the problem. Their article also posed a danger that mirrors a disturbing trend in the public discourse about conflicts and injustice. In response to the recent escalation of international violence and years of mixed results of engagement in debates centered around grievances of injustice (such as the Palestinian-Israeli conflict), many politicians, pundits, and scholars have advocated addressing conflicts by separating them from the underlying grievances and the ongoing injustice. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

忠武输气管道悬索跨越设计创新及探讨

忠武输气管道有4次悬索跨越,分别是蚂蝗溪悬索跨越、木龙河悬索跨越、马水河悬索跨越、野三河悬索跨越。文章介绍了这几座悬索跨越管桥设计中采用的多项新技术,如采用热聚乙烯半平行钢丝索代替以往的钢丝绳;采用钢管塔架代替以往的角钢塔架;根据地形地貌特点变换风索型式或取消塔架等。这些新技术、新设计在工程中均取得了良好的效果。另外,文章还针对悬索跨越桥面结构型式、预拱度设置、不对称荷载的影响、风索基础的设置等问题进行了探讨。     

Computerized IR Determination of Structural Group Composition for High-Boiling Oil Fractions

A computerized form is given of IR spectral determination for structural group composition in high-boiling oil fractions by Berthold's method (7 structural elements) and Kuklinskii's method (28 structural elements), which reduces the analysis time by factors of 3–4 and improves the accuracy.     

Reading Motivation: Multidimensional and Indeterminate.

The Motivations for Reading Questionnaire (MRQ) contains 54 items that are posited to tap 11 dimensions of reading motivation. The structural validity of the MRQ was investigated with 2 samples: (a) 328 students in Grades 3-5 from 2 suburban mid-Atlantic elementary schools and (b) 735 students in Grades 3-5 in 2 suburban southwestern elementary schools. With confirmatory factor analyses (CFAs), the theoretical 11-factor structure did not adequately fit the data in either sample. Subsequently, exploratory factor analyses found 8 factors for each sample with 6 factors defined by only 3 or 4 common items. However, a double CFA cross-validation found an inadequate fit for both samples. Given these results, the authors suggest that the MRQ be revised. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Damage Development in Gray Cast Iron under Static Deformation

The authors discuss the results of experimental investigation of structural degradation of gray cast iron at various stages of static tensile deformation. Analysis of the deformation process has revealed that damageability of a material under loading can be assessed by both a special strain parameter and scatter of hardness characteristics or a ratio of the modulus deviation to the current value of the elastic modulus. A correlation between these parameters has been established.     

电子显微学在结构生物学研究中的新进展

电子显微学是结构生物学的重要分支，已经成为一种公认的研究生物大分子、超分子复合体及亚细胞结构的有力手段。本文先回顾了近期电子显微学在技术上的新进展，后概述了生物电子显微学的三个组成部分——电子晶体学，单颗粒技术，电子断层成像术的基本原理，技术方法与研究现状。最后，对电子显微学与其他结构生物学研究手段的结合以及电子显微学的未来发展做了简单的展望。     

永升城基础大体积混凝土施工的裂缝预控

基础大体积混凝土施工的裂缝控制 ,从分析产生裂缝的原因来阐述 ,将冷缝作为结构性裂缝来预控     

东濮凹陷三春集下第三系隐蔽油气藏研究

东濮凹陷三春集地区下第三系隆起带各高点勘探效果较东翼斜坡带差，但具备形成隐蔽油气藏的地质条件，该地区沙四上亚段－沙三下亚段烃源岩晚第三纪早中期产烃规模有限，生成的油气沿着断层向固阳洼陷西侧运移，在春东断层下降盘中的反向屋脊岩性圈闭中富集。通过石油地质综合研究，预测固阳洼陷西侧为三春集构造带陷蔽油气藏滚动勘探的有利地区。图3参2（张建军摘）。