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Search Results: 1 - 10 of 111 matches for " 刘德华 "
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生物能源专刊序言
刘德华
生物工程学报 , 2011,
Abstract: 生物能源作为可再生能源,有望减少能源供给中对石油的依赖程度。近年来,我国生物能源的发展非常迅速,已经成为继巴西和美国后的第三大燃料乙醇生产国和消费国。为促进生物能源相关技术研究的发展,本期“生物能源”专刊收录了我国生物能源专家学者在燃料乙醇、生物柴油、微生物油脂、生物燃料系统分析等领域的最新研究进展。
2013生物能源专刊序言
刘德华
生物工程学报 , 2013,
Abstract: 生物能源作为可再生能源,可以替代部分石化能源,有望缓解能源供给中对石油的依赖程度。本期专刊结合第6届国际生物能源会议,包括综述和研究报告两部分,报道了我国生物能源专家学者在燃料乙醇、生物柴油、微生物油脂、生物燃料标准、航空生物燃料等领域的最新研究进展。
边底水凝析气藏气井产出水来源判断方法
Judging the Water Source of Gas Wells in Condensate Gas Reservoirs with Edge and Bottom Water
 [PDF]

孙敬, 刘德华, 徐海民
Journal of Oil and Gas Technology (JOGT) , 2016, DOI: 10.12677/jogt.2016.381007
Abstract:

气井生产过程中,影响气井产量的主要因素是井筒积液,而对于边底水凝析气藏这种矛盾表现得更为突出,因此正确预测和及时有效识别出水来源,对提高或稳定气井产量以及改善气藏开发效果有重要的意义。以A凝析气藏为研究背景,通过产出气中凝析水含量计算,生产井产气量、产水量、水气比等生产特征参数变化来确定气井具体的产水类型及井筒积液的来水特征,从而正确认识储层构造特征和气水分布关系,以利采取有效的控水措施。

During the progress of gas well production, the major factor which influences the gas well production is liquid loading, while as for the gas reservoirs with edge and bottom water, the contradiction is more serious. Therefore correctly predicting and timely and effectively recognizing the sources of water were of great significance for improving and stabilizing the gas wells production and improving the production effect in gas reservoirs. Taking Condensate Gas Reservoir A as the research background, this paper determined the type of gas well water production and the water characteristic of the liquid loading by calculating the water content in the condensate gas reservoir, gas production, water production and water and gas ratio of production wells, by which the reservoir structure and relation of gas and water distribution are correctly identified, and then the effective measures for water controlling can be taken.

聚合物驱剖面返转数值模拟方法研究
Research on Numerical Simulation Method of Section Inversion during Polymer Flooding
 [PDF]

郑爱玲, 康晓东, 刘德华
Journal of Oil and Gas Technology (JOGT) , 2016, DOI: 10.12677/jogt.2016.381008
Abstract:

非均质油藏聚合物单一段塞驱油过程中吸液剖面易发生返转,不利于提高采收率。针对室内物理模拟试验花费高、周期长、工作量大,常规数值模型难以描述聚合物驱剖面返转现象的问题,根据渗流理论、聚合物驱物化现象,建立了聚合物驱两层并联不窜流线性渗流模型;结合油藏数值模拟软件特点,提出了根据储层物性分区进行聚合物特征参数差异赋值的剖面返转数值模拟方法。采用建立的剖面返转数值模拟方法对油田聚合物驱剖面返转现象的影响因素进行了系统研究,结果表明,渗透率级差、注聚时机、聚合物质量浓度对聚合物剖面返转现象影响较大,为研究聚合物驱吸液剖面返转规律及减缓剖面返转现象提供技术支持。

The inversion of injection profile was easily induced in single slug injection in heterogeneous reservoirs; it was unfavorable for enhancing oil recovery. In allusion to the problems of high cost, long duration and heavy workload of laboratory simulation, which were hard to be described by conventional reservoir simulation, based on percolation theory and physical-chemical property in polymer flooding, an uncross flow linear percolation model of two parallel layers was established. Compared with the characteristics of simulation software, a simulation method for profile inversion was proposed based on the sorting of reservoir physical property. The studied method is used for systematically studying the factors influencing the profile inversion; the result shows that the permeability contrast, its injection time and its concentration are the major factors affecting the inversion; it provides a technical support for studying the regulation and the reduction of profile inversion in polymer flooding.

Preface for special issue on bioenergy
生物能源专刊序言

Dehua Liu,
刘德华

生物工程学报 , 2011,
Abstract: More and more attentions have been being paid to seeking alternatives for fossil fuels. Bioenergy, as a renewable energy, is one of the best solutions. Bioenergy has been developed rapidly in China, which became the third largest producer and consumer of fuel ethanol. In order to promote the research of bioenergy technology in China, this special issue includes latest reports and articles on the fields of bioethanol, biodiesel, microbial lipid and biofuel system analysis.
Preface for special issue on bioenergy (2013)
2013生物能源专刊序言

Dehua Liu,
刘德华

生物工程学报 , 2013,
Abstract: Bioenergy, as a renewable energy, is one of the best solutions to substitute part of fossil fuels. Based on the 6th World Bioenergy Symposium, this special issue includes latest reports and articles on the fields of bioethanol, biodiesel, microbial lipid, biofuel standard and aviation biofuels.
产妇及其新生儿血浆长链脂肪酸组成分析
李红娟,刘德华
中国公共卫生 , 2001, DOI: 10.11847/zgggws2001-17-01-05
Abstract: ?目的分析了20名正常产妇静脉血及其新生儿脐血血浆中脂肪酸组成.方法采用气相色谱法.结果脐血中廿二碳六烯酸(DHA)、花生四烯酸(AA)含量显着高于母血(P<0.001);脐血中亚油酸(LA)含量为母血的1/5,而α亚麻酸(αLNA)含量脐血与母血无显着差异;脐血中DHA含量与母血中DHA含量高相关(r2=0.76,P<0.001),脐血中AA与母血中AA、LA含量均显着性相关(P<0.05,P<0.001).结论母血中DHA、AA可优先通过胎盘满足胎儿需要;胎儿对n-3和n-6脂肪酸的利用可能存在差异.
太原市城区521名幼儿血铅水平及其影响因素调查
刘建安,刘德华
中国公共卫生 , 2000, DOI: 10.11847/zgggws2000-16-04-59
Abstract: ?对太原市市区交通要道旁和居民区两所幼儿园的空气、土壤、饮用水及幼儿的手尘铅进行了检测,并对幼儿铅中毒现状及其影响因素进行探讨.结果表明,太原城区幼儿园环境铅污染严重,幼儿面临铅污染的严重损害.土壤、灰尘是幼儿铅负荷的主要来源,不良卫生习惯而致手-口方式是铅进入机体的重要途径.逐步回归分析表明:幼儿不良卫生习惯、居住环境存在铅作业工厂、接送幼儿交通工具、零食花费、孕期用化妆品、早期喂养方式对幼儿血铅影响最有意义.
发育期补充DHA对大鼠学习记忆的影响
李红娟,刘德华
中国公共卫生 , 2001, DOI: 10.11847/zgggws2001-17-02-21
Abstract: ?目的探讨发育期补充DHA对大鼠学习记忆的影响.方法以出生前后脑发育关键期大鼠为研究对象,设一个对照组和添加DHA的3个剂量组(添加DHA的量分别为0、75、15、30g/kg饲料),喂养期限为妊娠第一日至仔鼠45日龄.选用跳台法和避暗法,进行幼鼠学习行为测试,并同步测定幼鼠海马内单胺类神经递质5-HTT、NE、DA和肽类神经递质生长抑素(SS)的含量.结果与对照组相比,15g/kg、30g/kg饲料组幼鼠跳台潜伏期延长,错误次数减少,避暗潜伏期延长,且15g/kg组最显着(P<0.05);补充DHA的各剂量组海马内5-HT、DA、SS含量均显着高于对照组(P<0.05).结论(1)发育期补充一定剂量的DHA,可增强大鼠学习记忆能力,较适剂量为15g/kg饲料;(2)DEIA增强学习记忆可能与海马内5-HT、DA、SS量增高有关,且存在其它递质或递质外系统的复杂调控.
卷烟厂建筑设计的发展趋向
刘德华,董霄龙
工业建筑 , 2005, DOI: 10.13204/j.gyjz200503004
Abstract: 卷烟厂是工业建筑的一个门类,近几年卷烟厂的建筑设计,在设计方法与观念上有了很大的突破和提高,在总体规划上体现了绿色卷烟建筑在生态方面的追求,在建筑文化性、艺术性的表现以及在建筑自动化、智能化等许多方面,都呈现出新的发展趋向。
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