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Search Results: 1 - 10 of 332834 matches for " <br>康志勤 "
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THEORETICAL RESEARCH ON THERMAL CRACKING FRACTALS LAWS OF OIL SHALE
油页岩热破裂规律分形理论研究

KANG Zhiqin,ZHAO Yangsheng,YANG Dong,<br>,赵阳升,杨栋
岩石力学与工程学报 , 2010,
Abstract: The oil shale thermal cracking CT images under different temperatures are considered as the analytical objects;and the basic theories of fractals to the thermal cracking procedure of oil shale are applied for the first time. The distribution laws of the thermal fissures within the range of 200 ℃-600 ℃ of oil shale square body of 7.0 mm in length are researched;and the fractals dimensions and initial distribution values of the fissures under different temperatures are obtained. The achieved results show that the thermal fissures have strong self-similarity according with fractals laws,and the values of fractal dimensions are ranged from 1.0 to 1.5. The relationship between fractals dimensions,initial distribution values and temperatures is established. With fractals theory,the thermal cracking procedure of the oil shale,distribution state and complexity of the fissures are analyzed. The derived conclusions for analyzing the evolution of micro-seepage channels in the oil shale pyrolysis have important references;and at the same time,a new method and certain ideas for thermal cracking procedure of other rocks with fractals theory are offered.
EXPERIMENTAL STUDY OF EFFECT OF TEMPERATURE ON PERMEABILITY CHARACTERISTICS OF LIGNITE
温度对褐煤渗透特性影响的试验研究

HU Yaoqing,ZHAO Yangsheng,YANG Dong,KANG Zhiqin,<br>胡耀青,赵阳升,杨栋,
岩石力学与工程学报 , 2010,
Abstract: 采用太原理工大学采矿工艺研究所研制的煤(岩)MDS200三轴渗透试验机,在不同应力、不同温度条件下,对内蒙乌盟矿区褐煤进行热渗透试验研究。研究结果表明:随着煤层埋藏深度的增加,即体积应力的增加,褐煤渗透率总体上是呈下降趋势;在温度和体积应力不变的情况下,褐煤随着孔隙压力的增大,渗透率呈先下降,再增大的趋势,其临界点为2 MPa左右;在体积应力和孔隙压力不变的情况下,随着温度的升高(100 ℃以内),褐煤的渗透率呈先下降,再急剧增大,再减小的趋势,渗透率的极低点温度为50 ℃左右,极高点温度80 ℃左右;当温度小于50 ℃时,随着孔隙压力的增大,渗透率呈下降趋势,当温度高于50 ℃时,随着孔隙压力的增大,渗透率呈上升趋势。
COPOLYMERIZATION OF PROPYLENE WITH 1-OCTENE OVER TiCl4/MgCl2 CATALYST
TiCl4/MgCl2催化丙烯/1-辛烯共聚合研究

ZHU Qin-qin,XU Zhi-kang,WANG Yi-qing,YANG Shi-lin,<br>朱,,王一青,杨士林
高分子学报 , 1991,
Abstract: The copolymerization of propylene with 1-octene over TiCl4/MgCl2-Al(i-Bu)3 system has been studied. It was found that the catalytic activity is higher in the case of copolymerization than that of homopolymerization. As the 1-octene concentration increased in copolymerization, the hrxane-insoluble fraction decreased and crystallinity of copolymer decreased to 1%. The monomer reactivity ratios were determined as rp=5.63 and r0=0.32. The monomer composition and sequence distribution of the copolymers were determined by IR and 13C-NMR.
Isolation and biological characteristics of spiroplasmas from flower surface
3种植物花螺原体的分离及其基本特性

Hanshou Yu,Kangqin Ruan,Yanling Ji,Yongxuan Chen,Zhiwei Wang,<br>于汉寿,,纪燕玲,陈永萱,
微生物学报 , 2008,
Abstract: 目的]调查我国植物花上的螺原体的存在,搜集我国的螺原体资源,并研究它们的基本生物学特性.方法]常规螺原体分离、培养方法,应用暗视野显微镜和透射电子显微镜观察螺原体形态,根据16S rDNA和ITS序列构建系统发育树研究螺原体分离菌株可能的分类地位.结果]分别从油菜(Brassica napus)、杜鹃(Rhododendron simsii)、红花酢浆草(Oxalis corymbosa)3种植物花表分离到4株螺原体CNR-1和CNR-2、CNA-1、CRW-1,对其形态、部分生理生化特性及分子生物学特性进行了初步研究.这4株螺原体在R-2液体培养基中生长良好,都能通过孔径为0.22 μm的微孔滤膜;在R-2固体培养基上呈圆形或颗粒状菌落,菌落直径约50~600 μm;在生长的某个阶段可呈典型的螺旋状,菌体直径为37.04~370.40 nm,长度约0.89~11.88 μm;它们都能利用葡萄糖作为碳源,不能利用尿素;在不含胎牛血清的R-2培养基中,它们都不能生长;菌株CNR-1、CNA-1能强烈代谢精氨酸,而CNR-2和CRW-1不能代谢精氨酸;在氨苄青霉素钠浓度高达2000 U/mL的R-2培养基中,分离菌株生长良好.根据16S rDNA序列构建的系统发育树显示,分离菌株CNR-1和CNR-2、CNA-1与蜜蜂螺原体Spiroplasma melliferum聚类较近,而CRW-1与S.clarkii聚类较近;根据ITS序列构建的系统发育树显示,CRW-1形成一个单独的分枝,其它3个菌株仍与S.melliferum聚类.结论]以上结果初步表明,分离菌株CNR-1和CNR-2、CNA-1极有可能是spiroplasma melliferum,而CRW-1可能是一个新的螺原体种,但还需要血清学试验进一步验证.
Advances in classification and biodiversity of spiroplasmas-A review
螺原体的分类及其生物多样性研究进展

Hanshou Yu?,Shuyuan Liu,Kangqin Ruan,Yongxuan Chen,Zhiwei Wang,<br>于汉寿,刘淑园,,陈永萱,
微生物学报 , 2009,
Abstract: Abstract: Spiroplasma spp. are helical, motile bacteria that lack cell wall and flagellum, and are enclosed within a single membrane with their genomes ranging from approximately 0.78-2.20 Mb in size, the smallest among known self-replicating prokaryotes. So they have been used as model organisms for studying movement, metabolisms and sex ratio. Currently, 34 serological groups are recognized; three of these groups encompass 15 subgroups of inter-related strains. To date, 37 species among all serogroups and subgroups have been given binomial names. Complete characterization of a new species involves numerous phenotypic and genotypic tests as outlined in the minimal standards document, including phylogenetic data and a reevaluated set of required phenotypic and genotypic tests. Spiroplasma spp. are most often found in association with insects and plants flowers, and the interactions of Spiroplasma/host can be classified as commensal, pathogenic or mutualistic. Investigation of spiroplasma resources in China and research on their biodiversity will undoubtedly improve our understanding of these important microbial resources.
MULTI-FIELD COUPLING THEORY OF POROUS MEDIA AND ITS APPLICATIONS TO RESOURCES AND ENERGY ENGINEERING
多孔介质多场耦合作用理论 及其在资源与能源工程中的应用

ZHAO Yangsheng,YANG Dong,FENG Zengchao,LIANG Weiguo,KANG Zhiqin,<br>赵阳升,杨 栋,冯增朝,梁卫国,
岩石力学与工程学报 , 2008,
Abstract: 详细介绍土木工程领域、环境工程领域、资源与能源开发工程领域中的多孔介质多场耦合作用的科学与技术问题,进而论述多孔介质多场耦合作用的科学内涵,其耦合作用理论包含固体应力场、渗流场、温度场和浓度场4个场的耦合作用,以及溶解的化学反应.介绍耦合作用的本构规律的研究重点与数学模型的组成,并深入讨论国内外关于固液、固气耦合作用下,孔隙与单一裂隙的渗流本构方程及其存在的问题.较详细介绍煤层气开采的裂隙介质固气耦合模型与应用、盐矿开采的固流热传质耦合模型与应用、高温岩体地热开采的固流热耦合模型及油页岩原位开采的相关技术与理论问题,讨论该类问题的数值模拟求解策略以及该类工程面临的深刻的理论与技术难题.
Micro-CT experimental research of oil shale thermal cracking laws
油页岩热破裂规律显微CT实验研究

KANG Zhi-Qin,ZHAO Yang-Sheng,MENG Qiao-Rong,YANG Dong,XI Bao-Ping,<br>,赵阳升,孟巧荣,杨栋,郤保平
地球物理学报 , 2009,
Abstract: 利用太原理工大学和中国工程物理研究院应用电子学研究所最新共同研制的μCT225kVFCB型高精度(μm级)CT试验分析系统,对油页岩从常温到600℃高温下的热破裂过程进行了显微观测和分析,揭示了抚顺油页岩的热破裂阈值温度为300℃附近.当温度低于300℃时,已可见到极少数较小的微裂隙出现,裂隙多发育于原生层理面以及硬质矿物颗粒的周围,形成的破裂面基本上都与层理面互相平行.当温度超过300℃,由于受到热分解化学反应的控制,裂隙的数量、长度和宽度剧烈增加,呈现广泛发育、集中爆发的特点,并使原有裂隙迅速延展和贯通,且裂隙面仍具有与层理面平行的特点,这是油页岩热破裂的典型特征;同时,也形成了许许多多垂直于层理方向的微小裂隙,小裂隙与大裂隙的搭接连通,形成了一个庞大的连通网络结构,从根本上提高了油页岩的渗流能力.
珠穆朗玛峰极高海拔地区表层雪化学元素浓度特征
张强弓,世昌,,刘勇
科学通报 , 2007,
Abstract: 对珠穆朗玛峰极高海拔地区(6500~8844m)表层雪化学元素浓度及空间分布进行了分析.结果表明,表层雪中元素随海拔高度并未表现出明显的规律性变化,这主要是由于高海拔地区的强风扰动引起表层雪的重新分布所造成;另外局地裸露基岩的粉尘输入对表层雪中的陆源元素随海拔的分布有较大影响.对比1975年同海拔样品元素浓度值发现,2005年样品除少数地点的个别元素外,均低于1975年.这表明因采样和测试技术手段的进步,2005年样品元素浓度测试的准确性更高.与全球其他地区降水样品相比,珠峰样品中的稀有元素与南北极及格陵兰地区雪样中的化学元素浓度大致相当,并且其含量远远低于受人类活动影响强烈的城市地区,说明珠峰受人类活动影响甚微,可以作为世界偏远地区大气环境背景的代表.
我国主要超镁铁岩蛇纹石化水的非大洋成因――(L-C)蛇纹岩的D/H和(18)O/(16)O
杨凤英,,戎合
矿物岩石 , 1992,
Abstract: 本文对贺根山、鲸鱼、东巧、罗布莎、玉石沟等地超镁铁岩中(L-C)蛇纹岩标本的氢、氧同位素组成进行了分析,其变化范围为:δD=-101―-146,δ(18)O=1.0―7.5。产生蛇纹石化作用时平衡计算水的氢、氧同位素为:330℃时δD=-77―-122,δD=-77―-122;200℃时δD=-67―-112,δ(18)O=-1.3―5.2。根据大洋型(L-C)蛇纹岩和大陆蛇绿岩杂岩型(L-C)蛇纹岩的氢、氧同位素组成特征来看,本文所研究的蛇纹岩明显地属于大陆蛇绿岩杂岩型蛇纹岩。蛇纹石化时平衡计算水的氢、氧同位素特征表明水的成因类型为大气降水型地下水,而非大洋水。本文中超镁铁岩的蛇纹石化作用发生在超镁铁岩侵位于大陆壳之后,即超镁铁岩的蛇纹石化作用发生于大陆环境,而非大洋环境,而且超镁铁岩在侵位于陆壳之后的最初阶段应为新鲜的地幔岩石。
TiCl4/MgCl2催化丙烯/1-辛烯共聚合研究
,,王一青,杨士林
高分子学报 , 1991,
Abstract: 本文用TiCl4/MgCl2-Al(i-Bu)3催化剂进行丙烯/1-辛烯共聚合,研究发现引入少量共聚单体1-辛烯时,能提高丙烯的聚合活性。30℃时,测得共聚合竟聚率为r_丙=5.63,r辛=0.32。共聚物的结晶度和己烷不溶物含量随其1-辛烯含量的增加而迅速下降。X射线衍射及13C-NMR测定结果表明,共聚物的己烷可溶部分为非结晶的无规共聚物,己烷不溶部分是具有镶嵌着半个1-辛烯单体单元的长嵌段聚丙烯链结构的结晶性共聚物。
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