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天然气工业 2011年第12期31卷 66-71,128页

作者：李景明巢海燕聂志宏中石油煤层气有限责任公司中联煤层气国家工程中心有限责任公司

煤层气钻井方式中,直井技术(包括丛式井)最为成熟,费用较低,操作简单,没有太大的使用限制,无论在前期开发评价,还是后期的增产改造和规模开发中,其作用都不可替代,是国内煤层气开发普遍采用的方式。为此,论述了其开发要点:①煤层气的选... 详细信息

煤层气钻井方式中,直井技术(包括丛式井)最为成熟,费用较低,操作简单,没有太大的使用限制,无论在前期开发评价,还是后期的增产改造和规模开发中,其作用都不可替代,是国内煤层气开发普遍采用的方式。为此,论述了其开发要点:①煤层气的选区、选井及选层主要依靠地震勘探技术结合基础地质技术完成;②单井评价通常以测井评价为主,录井技术和试井技术为辅,而测井记录的数据常需使用经过选择的煤心和试井数据标定,这样才能提高储层评价参数及单井评价的可靠性,进而确定射孔压裂层段;③直井的增产改造方法除水力压裂外,还可考虑裸眼完井和筛管完井技术,裸眼完井需考虑煤层适应性,而筛管完井除了应用于水平井外,也可以用于裸眼完井的直井中;④煤层气排采需紧密结合排采装备,初期以最小的强度稳定缓慢排采,然后根据地层实际供液能力调整工作制度,尽量使地层供液与排液量保持一致,稳定持续缓慢降液,尽可能地扩大压降范围。

关键词：煤层气直井开发布井地质录井裸眼完井筛管完井增产改造排水采气

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功能性木质炭素新材料的研究与开发

新型炭材料 2004年第2期19卷 151-157页

作者：黄彪高尚愚福建农林大学材料工程学院福建福州350002 南京林业大学化工学院江苏南京210037

　木质炭化物的高效开发利用,对解决废弃物资源化、环保、生态环境等问题将起到十分积极的作用。通过述评功能性木质炭素新材料的国内外研究和开发进展,涉及到木质炭素材料吸着特性的研究概况、木质炭化物在环境净化方面的应用、木质系... 详细信息

　木质炭化物的高效开发利用,对解决废弃物资源化、环保、生态环境等问题将起到十分积极的作用。通过述评功能性木质炭素新材料的国内外研究和开发进展,涉及到木质炭素材料吸着特性的研究概况、木质炭化物在环境净化方面的应用、木质系炭素新材料的研发、性能和应用等方面。着重介绍了一些木质系炭素新材料:木陶瓷、木质吸油材料、高电导性材料、保健材料、土壤改良材料、二氧化钛/炭复合材料、烧结炭等。同时对其副产物木醋液的应用领域,如在食品添加剂、消臭剂、医药、农业等方面的应用也做了一些梗概。由此可看出:木质炭化物新利用,高功能化的研发可使古老的木炭衍化为新颖的功能性材料,从而产生更高的经济、社会和生态效益。

关键词：功能性木质炭素木质炭化物吸着特性环境净化功能性材料

ACCELERATING REGIONAL EXPLORATION IN THE THREE MAJORBASINS OF XINJIANG TO EARLY REALIZE OIL PRODUCING AREAS TO BE STRATEGICALLY SUCCEEDED

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新疆石油地质 1995年第1期 80-84页

作者： Zhang Wenzhao(Professor of engineering, Petroleum Geology, Consultant center, CNPC, Beijing 100724)

ＡＣＣＥＬＥＲＡＴＩＮＧＲＥＧＩＯＮＡＬＥＸＰＬＯＲＡＴＩＯＮＩＮＴＨＥＴＨＲＥＥＭＡＪＯＲＢＡＳＩＮＳＯＦＸＩＮＪＩＡＮＧＴＯＥＡＲＬＹＲＥＡＬＩＺＥＯＩＬＰＲＯＤＵＣＩＮＧＡＲＥＡＳＴＯＢＥＳＴＲＡＴＥＧＩＣＡＬ... 详细信息

ＡＣＣＥＬＥＲＡＴＩＮＧＲＥＧＩＯＮＡＬＥＸＰＬＯＲＡＴＩＯＮＩＮＴＨＥＴＨＲＥＥＭＡＪＯＲＢＡＳＩＮＳＯＦＸＩＮＪＩＡＮＧＴＯＥＡＲＬＹＲＥＡＬＩＺＥＯＩＬＰＲＯＤＵＣＩＮＧＡＲＥＡＳＴＯＢＥＳＴＲＡＴＥＧＩＣＡＬＬＹＳＵＣＣＥＥＤＥＤＺｈａｎｇＷ...

关键词： Xinjiang Tarim basin Junggar basin Turpan-Hami basin Oil and gas resources Oil and gas exploration Oil-field development

Study on the Class-Based Admission Control Scheme for DiffServ in MPLS Networks

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Journal of Systems engineering and Electronics 2003年第3期14卷 40-44页

作者： Li Zhenyu , Zhang Zhongzhao Communication research center, Harbin Institute of Technology, Harbin 150001, P. R. china Communication research center Harbin Institute of Technology Harbin 150001 P. R. China

Differentiated services (DiffServ) and MPLS are two major building blocks for providing multi-class services over IP networks. In order to respond to the need for relatively simple, coarse methods of providing different levels of service for Internet traffic, to support various types of applications and specific business requirements, the MPLS network infrastructure and the DiffServ traffic model will work together. Meanwhile, in today’s environment of multiple service networks, it is necessary for the node in the networks to perform the control mechanism to guarantee various QoS. In

关键词： MPLS DiffServ Admission control.

Degradation of lignite model compounds by the action of white rot fungi

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Mining Science and Technology 2010年第1期20卷 76-81页

作者： DU Ying, TAO Xiuxiang, SHI Kaiyi, LI Yang School of Chemical engineering and Technology, china University of Mining & Technology, Xuzhou 221000, china School of Chemical engineering and Technology China University of Mining & Technology Xuzhou 221000 China

Three compounds modeled on the lignite structure were chosen for experimental degradation by different fungi strains. Culture conditions and extracellular enzyme activities were optimized. The growth curves of the strains were determined to study mycelium dry weight and protein content changes. Gas chromatography and infrared spectroscopy were used to detect changes of functional groups before and after the action of the fungi on the model compounds. Possible decomposition products and degrada-tion mechanisms were proposed. The research findings show that C. Versicolor and Golden Mushroom can grow in presence of the model compounds. The optimum culture conditions were a pH of 6.0, a carbon-nitrogen ratio of five and a Tween-80 concentration of 0.1%. Newly produced substances were found by gas chromatography. Infrared analysis showed that the model compounds degraded under the action of the microorganisms.

关键词： coal biotransformation white rot fungi mechanism model compound

A New Signal Processing Technique of π/4-DQPSK Modem Based on Software Radio

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Journal of Systems engineering and Electronics 2003年第2期14卷 20-24页

作者： Chang Jiang & Zhang Naitong Communication research center, Harbin Institute of Technology, Harbin 150001, P. R. china Communication research center Harbin Institute of Technology Harbin 150001 P. R. China

DQPSK modem has been chosen as the modem scheme in many mobile communication systems. A new signal processing technique of π/4-DQPSK modem based on software radio is discussed in this paper. Unlike many other software radio solutions to the subject, we choose a universal digital radio baseband processor operating as the co-processor of DSP. Only the core algorithms for signal processing are implemented with DSP. Thus the computation burden on DSP is reduced significantly. Compared with the traditional ones, the technique mentioned in this paper is more promising and attractive. It is extremely compact and power-efficient, which is often required by a mobile communication system. The implementation of baseband signal processing for π/4-DQPSK modem on this platform is illustrated in detail. Special emphases are laid on the architecture of the system and the algorithms used in the baseband signal processing. Finally, some experimental results are presented and the performances of the signal processing and compensation algorithms are evaluated through computer simulations.

关键词： DQPSK Baseband signal processing DSP Software radio.

Eco-economic evolution, emergy evaluation and policy options for the sustainable development of Tibet

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Journal of Geographical Sciences 2000年第1期10卷 1-27页

作者： YAN Mao-chao, H. T. Odum ( Commission for Integrated Survey of Natural resources, Chinese Academy of Sciences, Beijing, china, center for Environmental Policy, Department of Environmental engineering Sciences, University of Florida, Gainesville, FL, USA)

As economies and ecological support systems become more interdependent, new disciplines are needed to 'bridge the gap' of understanding between societies and nature. It is now clear that neither ecology nor economics alone can address the problems of our global commons. New measures of wealth, of value, of contributions and production are needed that acknowledge the 'natural capital' and 'ecosystem services' provided from healthy environments. A new interface is now being recognized termed 'eco-economics'. It is an ambitious and necessary attempt to understand the affairs of humanity and nature as a single, interdependent system. New tools are being invested to measure wealth. services and production fairly and equitably. In this report we use systems analysis approach to study the combined ecological-economic system of Tibet We use an alternative measure of value, based on real contributions to system performance, termed EMERGY, spelt with an 'M'. It is an accounting unit of total contributions, direct and indirect. used in generating a product or service. It is a concept derived from understanding whole systems, their interactions and interdependence, and the resources driving and maintaining them. This broader approach will help us to investigate Tibetan resources utilization and potentialities and exchange. Emergy analysis allows comparison and incroporation of environmental costs and benefits with variables of traditional economic costs and benefits to provide a more comprehensive perspective for public policy directives. Through this research, we think: 1) china has made a great effort in making Tibet develop from a closed regional system to a more and more opened regional system which is very important to the sustainable development of Tibet. 2) The increase of economic development and population growth has a close relationship with the total emergy storage and use in transportation. Education in modern science and technology increased the shared emergy of Ti

关键词： emergy eco-economic evolution sustainable development

高矿化度环境下黏性土对膨润土-砂土复合防渗层抗渗性的影响研究

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节水灌溉 2011年第11期 67-69,72页

作者：王晓芸崔自治张群崔永成宁夏大学旱区现代农业水资源高效利用教育部工程研究中心宁夏银川750021

以宁夏广泛分布的砂土为研究对象,以黏性土掺量c、盐浓度d、盐的复合比r、膨润土掺量p为因素,渗透系数为考察参数,设计L9(34)正交实验方案和单因素实验方案,实验研究了盐对膨润土-黏性土-砂土复合防渗层抗渗性的影响,揭示了黏性土掺量c... 详细信息

以宁夏广泛分布的砂土为研究对象,以黏性土掺量c、盐浓度d、盐的复合比r、膨润土掺量p为因素,渗透系数为考察参数,设计L9(34)正交实验方案和单因素实验方案,实验研究了盐对膨润土-黏性土-砂土复合防渗层抗渗性的影响,揭示了黏性土掺量c、盐浓度d、盐的复合比r、膨润土掺量p等因素对膨润土-黏性土-砂土复合防渗层抗渗性的作用规律和作用机理,为砂土基防渗层设计、施工提供理论依据。实验研究表明:在盐溶液环境中,膨润土的作用效应降低,黏性土的作用效应显著增强,但膨润土仍然是影响砂土基防渗层渗透性最主要的因素;土样的渗透系数随着盐溶液复合比的增大,呈现出先减小,后略微增大的趋势;黏性土使盐对砂土基防渗层的抗渗性影响显著降低,尤其是在高矿化度环境下,作用效应更为显著。

关键词：膨润土黏性土盐复合防渗