检索结果-南通市图书馆

Distribution characteristics of terrestrial heat flow density in Jiyang depression of Shengli Oilfield, East china

Science china Earth Sciences 2004年第9期47卷 804-812页

作者： GONG Yuling1,2, WANG Liangshu1, LIU Shaowen1, LI Cheng1, HAN Yongbing1, LI Hua1, LIU Bo1 & CAI Jingong3.1. department of Earth Sciences, Nanjing University, Nanjing 210093. china 2. department of Exploration and Information {3. of East china Institute of {3., Fuzhou 3.4000, china 3. Earth Science Institution of Shengli Oilfield, Dongying 257015, china department of Earth Sciences Nanjing University Nanjing China department of Exploration and Information technology of East china Institute of technology Fuzhou China Earth Science Institution of Shengli Oilfield Dongying China

Based on the geo-temperature data of 13.systematically continuous temperature log curves and 700 testing oil boreholes in Jiyang depression, Shengli Oilfield, and the measured thermal conductivities of 47 rock samples, the terrestrial heat flow densities of 114 boreholes of Jiyang depression and its surrounding areas are determined, including 13.of those data derived from systemically continuous temperature logging. The results show that Jiyang depression has a relatively high background heat flow with an average value (65.8 5.4) mW/m2. The lateral variation of heat flow in basin has negative correlation with basement depth. Moreover, heat flow of uplift areas with shallower basement is high, so are those of regions with volcanic rocks, and those of depression areas with deep basement are relatively low. The heat flow densities of different structural units of Jiyang depression can be summarized as follows: The average heat flow value of Zhanhua sag is (67.4 5.3. mW/m2, higher than that of the whole basin, that of Dongying sag is (66.0 6.1) mW/m2, and that of Chezhen sag is (65.1 3.7) mW/m2. It is apparent that these latter two values are approximate to the average value of the whole Jiyang depression, while the average value of Huimin sag is (63.65.0) mW/m2, lower than that of the whole basin. In fact, the basement depth and the distribution framework of uplift and depression areas are all controlled by the process of lithosphere extension. In addition, the distribution of volcanic rocks in basin is also relatively close to this extension geodynamic process. In summary, the distribution characteristics of terrestrial heat flow of Jiyang depression is determined by the Cenozoic tectono-thermal events of this region.

关键词： Jiyang depression, terrestrial heat flow, thermal conductivity.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparison study of trapped water in human erythrocytes by EPC and DSC method and its application

引用

Science china(Technological Sciences) 2004年第3期47卷 343-351页

作者： ZHAO Gang1, HE Liqun1, GUO Xiaojie2, LIU Zhong3. LUO Dawei1,3.& GAO Dayong1,3.1. Cryobiomedical Engineering Research Institute, department of Thermal Science and Energy Engineering, University of Science and technology of china, Hefei 23.027, china 2. Red Cross Blood Center of Hefei, Hefei 23.022, china 3. department of Mechanical Engineering, University of Kentucky, Lexington, KY 40506-0108, USA Cryobiomedical Engineering Research Institute Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230027 China Red Cross Blood Center of Hefel Hefei 230022 China department of Mechanical Engineering University of Kentucky Lexington KY 40506-0108 United States

The novel differential scanning calorimetry method for determining trapped water volume of human red blood cell during freezing process has been reexamined. Results show that the final erythrocyte volume is 53. of its isotonic volume after freezing to -40℃. An electronic particle counter (MultisizerTM III, Beckman Coulter Inc., USA) was used to measure cell volume changes in response to hypertonic solution. Using this approach, when extracellular solution was 3.86 mOsm, the equilibrium cell volume was found to be 57% of its isotonic value. Both results indicate that 3.%—40% of intracellular water is trapped and cannot respond to osmotic difference between intra- and extracellular solution. These findings are consistent with the published data: at least 20%—3.% of the isotonic cell water volume is retained within RBCs during freezing. Some applications of the values of trapped water are addressed.

关键词： differential scanning calorimeter/DSC, electronic particle counter/EPC, cell volumetric change, red blood cell/RBC/erythrocyte

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis and application of automatic deformation monitoring data for buildings and structures of mining area

引用

中国有色金属学会会刊：英文版 2011年第S3期21卷 516-522页

作者： XIAO Jie1, 2, 3. ZHANG Jin4 1. Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 43.077, china 2. Key Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 43.077, china 3. Graduate School of Chinese Academy of Sciences, Beijing 100049, china 4. {3. of Surveying and Mapping, Taiyuan University of technology, Taiyuan 03.024, china Institute of Geodesy and Geophysics Chinese Academy of Sciences Wuhan 430077 China Key Laboratory of Dynamic Geodesy Institute of Geodesy and Geophysics Chinese Academy of Sciences Wuhan 430077 China Graduate School of Chinese Academy of Sciences Beijing 100049 China department of Surveying and Mapping Taiyuan University of Technology Taiyuan 030024 China

The buildings and structures of mines were monitored automatically using modern surveying technology. Through the analysis of the monitoring data, the deformation characteristics were found out from three aspects containing points, lines and regions, which play an important role in understanding the stable state of buildings and structures. The stability and deformation of monitoring points were analysed, and time-series data of monitoring points were denoised with wavelet analysis and Kalman filtering, and exponent function and periodic function were used to get the ideal deformation trend model of monitoring points. Through calculating the monitoring data obtained, analyzing the deformation trend, and cognizing the deformation regularity, it can better service mine safety production and decision-making.

关键词： wavelet analysis Kalman filtering deformation monitoring data analysis mine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Heterotrophic bacteria of the Dapeng Bay in the South china Sea: community structure,abundance,and the relationships of culturablity with environmental factors

引用

Acta Oceanologica Sinica 2010年第4期29卷 88-97页

作者： JIANG Fajun HU Zhangli HU Chaoqun South china Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Guangxi Academy of Sciences Nanning 530007 China College of Life Sciences Shenzhen University Shenzhen 518060 China

The community composition,abundance and culturablity of heterotrophic bacterioplankton in the Dapeng Bay of the South china Sea were investigated by morphological method,bacterial cultivation and biochemical methods over an annual *** and Pseudomonas were the predominant genera among the Gram-negative *** bacterioplankton abundance fluctuated from 2.07×10 8 to 2.44×10 9 cells/dm 3.,and culturable bacteria abundance ranged between 0.1×10 6 and 16.07×10 6 CFU/dm 3..The Culturablity of heterotrophic bacteria ranged between 0.01% and 1.3.%.The relationship between bacterial culturablity and the environmental factors was also studied in different sites of the Dapeng *** the bay,a significantly positive relationship was evidenced between bacterial culturability and temperature,meanswhile bacterial culturability was significantly inversely related with *** positive relationship was shown at the central bay while a negative relationship was observed at the bay mouth and there was no significant correlation at top bay between bacterial culturablity and chlorophyll a of sea water.A positive relationship was found between culturability and DIN all the bay,but DIP showed a significantly negative relationship with bacterial culturability only at the mouth of the bay.

关键词： heterotrophic bacteria culturable bacteria culturablity environmental factors

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The construction of infinite families of any k-tight optimal and singular k-tight optimal directed double loop networks

引用

Science china Mathematics 2007年第7期50卷 1055-1064页

作者： Bao-xing CHEN~(1+) Xie-bin CHEN~2 Ji-xiang MENG~3.Wen-jun XIAO~4 1 department of Computer Science,Zhangzhou Teachers College,Zhangzhou 3.3.00,china 2 department of Mathematics and Information Science,Zhangzhou Teachers College,Zhangzhou 3.3.00,china 3.College of Mathematics & System Science,Xinjiang University,Urumqi 83.046,china 4 department of Computer Science,South china University of technology,guangzhou 510641,china department of Computer Science Zhangzhou Teachers College Zhangzhou China department of Mathematics and Information Science Zhangzhou Teachers College Zhangzhou China College of Mathematics & System Science Xinjiang University Urumqi China department of Computer Science South China University of Technology Guangzhou China

The double loop network(DLN)is a circulant digraph with n nodes and outdegree *** is an important topological structure of computer interconnection networks and has been widely used in the designing of local area networks and distributed *** the number n of nodes,how to construct a DLN which has minimum diameter?This problem has attracted great attention.A related and longtime unsolved problem is:for any given non-negative integer k,is there an infinite family of k-tight optimal DLN?In this paper,two main results are obtained:(1)for any k≥0,the infinite families of k-tight optimal DLN can be constructed,where the number n(k,e,c)of their nodes is a polynomial of degree 2 in e with integral coefficients containing a parameter c.(2)for any k≥0, an infinite family of singular k-tight optimal DLN can be constructed.

关键词： double loop network diameter k-tight optimal singular k-tight optimal 05C12 05C20 05C85

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microstructural Characteristic of Montmorillonite and Its Thermal Treatment Products

引用

Journal of Wuhan University of technology(Materials Science) 2005年第1期20卷 83-88页

作者：吴平霄 department of Environmental Science and Engineering South China Universithy of TechnologyGuangzhou 510640China

The montmorillonite was studied by differen t methods, such as chemical analysis, DAT, TG, X RD, IR, AFM and MAS NMR. The experimental results show that the hydroxyl in octa hedra sheets begins dehydrating when the thermal treatment temperature reaches 659℃, but th e layer structure remains the same,and the corresponding Al(Ⅵ) is turned into Al(Ⅳ) in octahedra sheets. When the temperature reaches 900℃, the layer struct ure of montmorillontite is destroyed, and the new mineral phase μ-cordierite i s found. When the temperature reaches 1200℃, the μ-cordierite phase loses its stability, and decomposes into cristobalite phase and mullite ***, the recrystallization phenomenon in thermal treatment products is obvious. There is a small quantity of Al Ⅵ signal in MAS NMR spectrum, corresponding to Al of mullite. When the temperature reaches 13.0℃, the cristobalite and mullite phases reduce slightly, and more Fe-cordierite phase appears, corresponding to Fe-cordierite spectrum in XRD and MAS NMR.

关键词： montmorillonite thermal treatment product micro structure μ-cordierite

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Heterotetranuclear Cu_2~IPd_2~Ⅱ Complex with Bis(diphenylphosphino)methane and Diethyldithiocarbamate

引用

Chinese Journal of Structural Chemistry 2003年第4期22卷 435-438页

作者： SITU Yue HUANG Shao-Bin (department of Applied Chemistry, South china University of technology, {3., Guangdong 510640, china)

Self-assembly between the building blocks of Pd(Et2dtc)2 (Et2dtc = diethyldithio- carbamate) and [Cu2(m-dppm)2(MeCN)2]2+ (dppm = bis(diphenylphosphino)methane) gave a new heterotetranuclear complex [Cu2Pd2(m-dppm)2(m-Et2dtc)2(m3.Et2dtc)2](ClO4)2H2O (C70H86Cl2Cu2- N4O9P4Pd2S8, Mr = 193..56), and its crystal structure has been determined by X-ray crystallo- graphy. It crystallizes in triclinic, space group P with a = 11.983.(6), b = 12.5624(6), c = 14.5603.8) ? a = 101.3.3.(1), b = 103.3.0 (1), g = 96.3.0(1), V = 2063.2(2) 3. Z = 1, Dc = 1.544 g/cm3. m(MoKa) = 13.6 cm-1 and F(000) = 978. The total and unique reflections are 8710 and 5400, respectively. The structure was refined to R = 0.0860 and wR = 0.1996 for 3.14 observed reflections with I > 2s(I). The title complex consists of the cation [Cu2Pd2(m-dppm)2(m-Et2dtc)2(m3. Et2dtc)2]2+, anion ClO4- and solvate H2O. The Pd(Ⅱ) atoms are located at the approximately square-planar environments with PS3.donors and the Cu(I) atoms display distorted tetrahedral geometries.

关键词： bis(diphenylphosphino)methane diethyldithiocarbamate copper crystal structure palladium

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Linearly time-varying channel estimation and training power allocation for OFDM/MIMO systems using superimposed training

引用

Science china(Information Sciences) 2011年第7期54卷 1456-1470页

作者： ZHANG Han 1,DAI XianHua 2 & Pan DaRu 1 1 School of Physics and Telecommunication Engineering,South china Normal University,guangzhou 510006,china 2 {3. of Information Science and technology,SUN Yat-sen University,guangzhou 510026,china School of Physics and Telecommunication Engineering South China Normal University Guangzhou China department of Information Science and technology SUN Yat-sen University Guangzhou China

We address the problem of estimating the linearly time-varying (LTV) channel of orthogonal frequency division multiplexing (OFDM)/multiple-input multiple-output (MIMO) systems using superimposed training (ST).The LTV channel is modeled by truncated discrete Fourier *** on this model,a two-step approach is adopted to estimate the LTV channel over multiple OFDM *** also present performance analysis of the channel estimation and derive a closed-form expression for the channel estimation *** is shown that the estimation variances,unlike that of the conventional ST-based schemes,approach to a fixed lower-bound as the training length increases,which is directly proportional to information-pilot power *** wireless communication systems with a limited transmission power,we optimize the ST power allocation by maximizing the lower bound of the average channel *** results show that the proposed approach outperforms the frequency-division multiplexed training schemes.

关键词： OFDM/MIMO systems linearly time-varying channel estimation superimposed training training power allocation

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Global existence and blow-up of solutions to a parabolic system with nonlocal sources and boundaries

引用

Science china Mathematics 2007年第9期50卷 1251-1266页

作者： Ling-hua KONG~(1+) Ming-xin WANG~(2,3. 1 department of Applied Mathematics,Dalian University of technology,Dalian 116024,china 2 department of Mathematics,Southeast University,Nanjing 210018,china 3.department of Mathematics,Xuzhou Normal University,Xuzhou 221116,china department of Applied Mathematics Dalian University of Technology Dalian China department of Mathematics Southeast University Nanjing China department of Mathematics Xuzhou Normal University Xuzhou China

This paper deals with a semi-linear parabolic system with nonlinear nonlocal sources and nonlocal boundaries. By using super-and sub-solution techniques, we first give the sufficient conditions that the classical solution exists globally and blows up in a finite time respectively, and then give the necessary and sufficient conditions that two components u and ν blow up simultaneously. Finally, the uniform blow-up profiles in the interior are presented.

关键词： parabolic system nonlocal sources nonlocal boundary conditions blow-up set simultaneous blow-up uniform blow-up profile 3.K15 3.K65

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

ω-Gorenstein injective modules and dimensions

引用

Science china Mathematics 2011年第3期54卷 421-436页

作者： ZHU HaiYan1,2 & DING NanQing3.1department of Mathematics, Zhejiang University, Zhejiang 3.0027, china 2department of Mathematics, Zhejiang University of {3., Zhejiang 3.0023. china 3.0} of Mathematics, Nanjing University, Nanjing 210093. china department of Mathematics Zhejiang University Zhejiang China department of Mathematics Zhejiang University of Technology Zhejiang China department of Mathematics Nanjing University Nanjing China

Gorenstein injective modules and dimensions have been studied extensively by many authors. In this paper, we investigate Gorenstein injective modules and dimensions relative to a Wakamatsu tilting module.

关键词： Wakamatsu tilting module ω-Gorenstein injective module ω-Gorenstein injective dimension cotilting module

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：