提高检测数据准确性 促进选钼生产稳定高效

本文从6个方面对选钼2个作业段的取样方式进行了校验,通过对检测数据的比对分析,找出了选钼2个作业段数据存在矛盾的原因,并针对原因采取了有效的措施,保证了检测数据的准确性,促进了选钼生产的稳定高效。     

Integrated development of CFRP structures for a topless high performance vehicle

When modern saloon cars are re-engineered as convertibles (or roadsters) it is typical for them to lose 50% or more of the body’s torsional rigidity. Consequently the vehicles rarely handle quite as crisply, nor do they ride as well as the coupes from which they derived. This paper highlights the fundamental contributions of advanced composites in achieving the desired value of handling of the Murcièlago Roadster without penalizing the overall weight of the vehicle. To compensate for the absence of the roof structure, the vehicle was strongly redesigned by introducing new structural members and reinforcing existing critical components. A new all-carbon/epoxy composite sub-frame, which spans the entire engine bay, is comprised of elliptical tubular members, and it is the first of its kind in a production vehicle. Engineering of the sub-frame, from preliminary design to manufacturing decisions, is the focus of this paper, and is achieved through a Building Block approach that sets the program within the Integrated Product Development (IPD) strategy that the Advanced Composites Division of Automobili Lamborghini S.p.A. employs for its technology demonstrators. The strategy consists in a concurrent analytical and experimental development of the product, from the initial conceptual design and coupon testing, through the stages of element and subcomponent engineering, to final component manufacturing.     

玻璃钢管道的特点,设计原理及选用时的注意事项

本文旨在通过对玻璃钢管道及其标准的发展历史、产品特点、基本设计原理、质量影响因素及选用时应注意的事项等方面的介绍，使用户与工程设计人员对该产品有一个比较全面的了解，以便更好地选用并受益于这种管材。     

日本移动通信频率选择技术动向

本文介绍日本在移动通信中频率选择的技术动向以及开展移动通信频率资源的几项措施。     

让案例教学走进高职计算机学科

"案例教学法"(CaseStudy)是一种以案例为基础的教学法,把真实的情景进行典型化处理后供学生思考分析和决断,让学生分组自助谈论和研究,从而提高学生对于问题的分析和解决的能力。     

涪陵工区测井系列优化选择探讨

选择一口井测井系列,主要依据井的区域地质情况,井所钻探的地层是否存在邻井、井所钻探的油藏是否处于生产开发期等因素。测井系列的选择应满足油气勘探、开发的需要,满足地质和工程评价需要等要求。裸眼直井段测井系列选择,除必测项目外,建议增测地层倾角、微电阻率成像、ECS元素俘获测井项目。主要解决地层剥蚀面识别问题。裸眼水平井段测井系列选择,建议增测微电阻率成像、核磁共振、ECS元素俘获测井项目。套管井测井系列选择,建议增测存储式测井项目。创新优选的测井系列和资料采集项目符合中石化南方公司的勘探要求,为涪陵工区页岩气低成本和高效开发提供了必要的技术支持。     

页岩气选区评价关键参数及上下限

四川盆地及其周缘页岩气资源丰富,选区评价是获取页岩气区块并实现勘探开发的前提,然而目前页岩气选区评价关键参数并不统一,关键参数标准及上下限仍存在争议并缺乏系统性研究,因此亟需建立一套适用于高热演化海相页岩气的选区评价体系。充分调研了国内外页岩气选区评价方法、行业和企业标准及公开文献,开展了各类选区评价参数统计,优选了选区评价关键参数,探究了每个关键参数的上下限,建立了页岩气选区评价关键参数取值范围标准。研究优选出7个页岩气选区评价关键参数,主要包括有机碳含量（TOC）、成熟度（R_O）、孔隙度、压力系数、埋藏深度、脆性矿物含量和页岩有效厚度。有机碳含量作为页岩气选区评价的首要关键参数,其下限可降到1.0%;成熟度R_O是页岩气聚集形成的重要指标,其下限仍为1.3%,上限可提高至4.0%;孔隙度作为页岩储层评价的重要参数,其下限仍为2.0%;压力系数作为页岩气的保存参数,其下限可降至1.0;页岩埋藏深度的上下限分别为1 000 m和5 000 m;脆性矿物含量作为压裂参数,其下限仍为40%;页岩有效厚度应选取TOC>2.0%、1.3%<R_O<3.5%、孔隙度>2.0%和脆性矿物含量>40%的页岩层段,其下限为20 m。优选的选区评价关键参数及建立的上下限标准,对中国复杂构造背景下的高过成熟海相页岩气的选区评价和高效勘探开发具有重要指导意义。     

铸造厂感应电炉的选型

阐述中频电炉在铸造厂的应用，讨论感应电炉选型时需要考虑的因素，电炉容量和功率大小与工艺需求的关系，电源类型，电源与电炉的配置等与工艺需求的关系。对感应电炉选型时容易混淆的电炉熔化率与生产率的关系，展开讨论，引入功率利用系数的概念。     

斜齿圆柱齿轮无差动滚切技术研究

对无差动滚切技术进行了系统的研究，提出了一种用无差动法滚切斜齿圆柱齿轮及其挂轮选择的新方法。用本方法可以快速地选择高精度挂轮，达到较高的加工精度．在生产中有实际意义。     

Media Niche of Electronic Communication Channels in Friendship: A Meta‐Analysis

The current landscape of communication technologies is characterized by a wide variety of choices. As each medium provides different affordances, each may occupy a different niche and be used in different relationships. Drawing on the theory of the niche, we did a meta‐analysis involving 27 effect sizes from 22 independent samples to test the correlation between media selection/use and friendship closeness. Results showed that the 5 communication channels filled 2 different friendship closeness niches. Mobile phone calls and texting had stronger positive correlations with friendship closeness than instant messaging, social network sites, and online gaming. Culture, but not gender, moderated some of these correlations: Friendship closeness had a stronger positive association with SNS use and online gaming in collectivist cultures.