天然气气举井计量误差的探讨

气举排水采气井需要借助压缩机提高高压气源,而压缩机多采用往复式压缩机,增压后的天然气产生脉动流,对孔板流量计计量产生很大偏差,无法准确计算出高压气举后气井产气量,为气举效果分析无法提供准确数据.本文就脉动流时天然气计量的影响提出了整改和修正措施,以改变目前气举井计量误差较大的状况.     

浅述隧道工程新奥法施工

新奥法即新奥地利隧道施工方法的简称,它是以隧道工程经验和岩体力学的理论为基础,将锚杆和喷射馄凝土细合在-起作为主要支护手段的一种施工方法,经过一些国家的许多实践和理论研究,于60年代取得专利权并正式命名.     

GLOBAL Auto Shows Boom in 2007

China's independent brands have been booming in recent years when the country's auto industry has seen a rapid growth.They have attract- ed the global attention,but still need to up- grade constantly whether in technology or business performance in order to strength- en their presence in the global market and become internationalized.Global shows have definitely been the arena for them to     

创新融资机制增强林业活力

屏南县是福建省重点林区县之一,全县林业用地面积183.7万亩,有林地面积166.3万亩.随着林业改革的不断深入,林业融资难现象日益凸现,成为制约林业发展的瓶颈,为使我县林业尽早摆脱困境,我们积极探索各种有效措施,运用现代金融手段,依托完善的森林物权系统,积极引导社会资金投入林业,在创新林业投融资机制工作中取得一定成效.     

Welcome to Czech Art Festival in Beijing!

A glimpse of exoticism from Czechia in golden Beijing! Czech Embassy will give a panorama of natural environment, history and relics, cultural fruits and industrial development of the Czech Republic to everyone. Distinctive fashion show, Czech contemporary design exhibition and introduction to relevant businesses and tourism will also be provided. This is a dazzling demonstration that you should not miss! Here are the the upcoming activities at the Festival.[第一段]     

中储粮单县直属库创建“学习型企业”见成效

近几年，中储粮单县直属库把加强员工教育、提高综合素质当作一项战略任务来抓，积极构建学习平台，开展创建“学习型企业”活动，夯实了发展基础，促进了企业发展。     

利用资源优势,建设重要战略资源开发基地

四川省许多资源的探储量和远景储量非常丰富,但市场优势不突出。我们应将其物理丰度转化为市场优势,引进资金大力开发潜在的资源,将资源优势转化为经济优势,通过建设重要战略资源开发基地,拉动国民经济的快速增长,促进西部经济发展高地的建设。     

R) and thermo-gravimetric analyses(TG).The results indicated t

treatment in ethanol solvent,and flake shape crystal after treatment in water solvent.Peak temperature for thermal decomposition of NC/NG decreased by 3 ℃,and decomposition enthalpy increased by 735 J·g-1.The ca     

冬天的炉火

一场波及全球的金融海啸正进一步恶化为全球性的经济危机.如何度过这个寒冬,不仅仅是各国政要殚精竭虑试图解决的难题,也正成为每个家庭不得不面对的一场考验.