检索结果-南通市图书馆

Petroleum Science 2023年第3期20卷 1347-1362页

作者： Yu-Ke Liu Hua-jian Wang jin-you zhang Zhen-Wu Liu Fa-Zi Chen Xiao-Mei Wang Shui-Chang zhang He Liu Research Institute of Petroleum Exploration and Development Beijing100083China Key Laboratory of Petroleum Geochemistry China National Petroleum CorporationBeijing100083China Daqing Oil Field Company China National Petroleum CorporationDaqingHeilongjiang163000China School of Ocean Sciences China University of GeosciencesBejing100083China

Petrogenesis of lacustrine dolostone is closely related with paleo-lake water *** we report the high spatial-resolution petrographic and geochemical results of a lacustrine dolomite nodule from the Qingshankou Formation,the Songliao *** and elemental signatures confirm the protogenetic origin of this nodule and its effectiveness in recording geochemical characteristics of paleo-lake water during *** low Y/Ho ratios,middle rare earth element(MREE)enrichment and subtle positive Eu anomalies within the nodule indicate a fresh water ***,the Sr isotope values in the core of the nodule(0.7076-0.7080)are close to contemporaneous seawater(0.7074),yet different from the modern river(0.7120)and the host black shale(0.7100).On the premise of excluding the influence of hydrothermal fluids,the significantly low strontium isotope values of the lacustrine dolomite might be caused by seawater interference during *** findings demonstrate that lacustrine dolomite within black shales is not only a faithful tracer of diagenetic water environment,but also a novel and easily identified mineralogical evidence for episodic seawater intrusion event(91 Ma)in the Songliao Basin,which supplements other paleontological and geochemical evidence.

关键词： Songliao Basin Lacustrine dolostone Seawater intrusion Rare earth elements Strontium isotope

Hydrocarbon generation differences of shales composed of green algal and cyanobacteria: A case study of Mesozoic and Cenozoic saline lacustrine shales in Junggar Basin, NW China

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2023年第6期20卷 3348-3362页

作者： Miao Yu Gang Gao Wan-Yun Ma Miao Liu Ni Zhou you-jin zhang Dan He Ke-Ting Fan Liu-Lin-Bo Guo Jie Li College of Geosciences China University of PetroleumBeijing102249China Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China Research Institute of Experimental Testing Xinjiang Oilfield CompanyPetroChinaKaramay834000XinjiangChina Xinjiang Conglomerate Reservoir Laboratory Karamay834000XinjiangChina Key Laboratory of Exploration and Development of Conglomerate Reservoirs Karamay834000XinjiangChina

The Mesozoic and Cenozoic strata in the Junggar basin developed two sets of shallow to semi-deep lacustrine shale, namely, the Cretaceous Qingshuihe Formation (K_(1q)) and the Paleogene Anjihaihe Formation (E_(2-3a)). Through organic petrology and scanning electron microscope (SEM) observation, it is found that the primary hydrocarbon-generating organic matter (OM) in the two sets of strata is different. The biological precursor of the E_(2-3a) OM is mainly green algae (Pediastrum), while the precursor of K_(1q) kerogen is mainly cyanobacteria (Oscillatoria). Then, the E_(2-3a) green algae-rich shale and K_(1q) cyanobacteria-rich shale were subjected to hydrous pyrolysis and kinetic analysis, respectively. The results show that the evolution modes of hydrocarbon generation of the typical shales are very different. Green algae have the characteristics of a low oil generation threshold, heavy oil quality, and no prominent oil peak, while cyanobacteria have the characteristics of late oil generation, concentrated hydrocarbon generation, and relatively light oil quality. The characteristics of oil generation can also be well reflected in the composition evolution of the crude oil components. The carbon isotope of gas, kerogen, and extracts of the E_(2-3a) green algae-rich shale are significantly heavier than the K_(1q) cyanobacteria-rich shale, which may be related to the living habits of their biological precursors, carbon source usage, photosynthesis efficiency, and carbon fixation efficiency.

关键词： Green algae Cyanobacteria Shale Anjhaihe Formation Qingshuihe Formation Junggar Basin

Low-temperature Catalytic Reduction of Nitrogen Monoxide with Carbon Monoxide on Copper Iron and Copper Cobalt Composite Oxides

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2008年第4期21卷 393-400页

作者： Jun-sheng Shu Wen-shui Xia you-jin zhang Tao Cheng Min-rui Gao School of Food Science and Technology Southern Yantze University Wuxi 214122 China Department of Chemistry University of Science and Technology of China Hefei 230025 China

Copper iron composite oxides （CuO/Fe2O3） and copper cobalt composite oxides （CuO/Co3O4） for the catalytic reduction of NO with CO at low temperature were prepared by co-precipitation. The catalytic activity and thermal stability of the catalysts were evaluated by a microreactor-GC system. The 100% conversion temperatures of NO are 80 ℃ for CuO/Fe2O3 and 90 ℃ for CuO/Co3O4. The catalysts possess high catalytic activity and favorable thermal stability for NO reduction with CO in a wide temperature range and long time range. A systematic study of the molar ratios of the reactants, the volume of NaOH, aging time, and calcination temperature/time was carried out to investigate the influence preparation conditions on the catalytic activity of the catalysts.

关键词： CuO/Fe2O3 CUO/Co3O4 NO reduction Catalytic activity Thermal stability

Identification of differentially expressed genes in human uterine leiomyomas using differential display

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cell Research 2002年第1期12卷 39-45页

作者： BIN LI, MEI SUN, BIN HE, jin YU, you DUAN zhang, YONG LIAN zhang, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institute for Biological Science, Chinese Academy of Sciences, 820, Yue- Yang Road, Shanghai, 1State Key Laboratory of Molecular Biology Institute of Biochemistry and Cell Biology Shanghai Institute for Biological Science Chinese Academy of Sciences 320 Yue-Yang Road Shanghai 200031 China 1State Key Laboratory of Molecular Biology Institute of Biochemistry and Cell Biology Shanghai Institute for Biological Science Chinese Academy of Sciences 320 Yue-Yang Road Shanghai 200031 China 1State Key Laboratory of Molecular Biology Institute of Biochemistry and Cell Biology Shanghai Institute for Biological Science Chinese Academy of Sciences 320 Yue-Yang Road Shanghai 200031 China 2OB/GYN Hospital Shanghai (First) Medical University 419 Fang-Xie Road Shanghai China 1State Key Laboratory of Molecular Biology Institute of Biochemistry and Cell Biology Shanghai Institute for Biological Science Chinese Academy of Sciences 320 Yue-Yang Road Shanghai 200031 China 1State Key Laboratory of Molecular Biology Institute of Biochemistry and Cell Biology Shanghai Institute for Biological Science Chinese Academy of Sciences 320 Yue-Yang Road Shanghai 200031 China

In searching of differentially expressed genes in human uterine leiomyomas, differential display was used with twelve pairs of primers to compare human uterine leiomyomas with matched myometrium. False positives were eliminated by reverse Northern analysis. Positives were confirmed by Northern blot analysis. RESULTS: [1] Four of 69 cDNA fragments (3 up-regulated named L1, L2 and L3 and 1 down-regulated named Mi in leiomyoma) were confirmed by Northern analysis. [2] Sequence comparison and Northern analysis proved that Li is exactly the human ribosomal protein Si9. [3] It was present ubiquitously in i3 tissues tested but in various levels and even in different size. [4] Li was highly expressed in parotidean cystadenocarcinoma, pancreatic cancer and breast cancer examined. [5] No mutations have been found in human uterine leiomyomas (n=6). CONCLUSIONS: hRPSi9 overexpression might be a universal signal in rapid cell growth tissues.

关键词： Human uterine leiomyomas differentially expressed gene differential display (DD) human S19 ribosomal protein (hRPS19) up-regulated gene in human leiomyomas.

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

正压式狭缝牵伸器内部结构参数的优化

东华大学学报（自然科学版） 2009年第6期35卷 643-649,679页

作者：张梅靳向煜游锦璋杨光吉林大学军需科技学院吉林长春130062 东华大学产业用纺织品教育部工程研究中心上海201620

依据气体动力学不等熵流动理论,采用带旋流修正的k-ε湍流模型对正压式狭缝牵伸器内部流场进行数值计算,得出正压式狭缝牵伸器参数引射段长度、狭缝宽度、牵伸段长度、空气刀口距离及喷射角对流场内压力和速度的影响,并提出了各参数的... 详细信息

依据气体动力学不等熵流动理论,采用带旋流修正的k-ε湍流模型对正压式狭缝牵伸器内部流场进行数值计算,得出正压式狭缝牵伸器参数引射段长度、狭缝宽度、牵伸段长度、空气刀口距离及喷射角对流场内压力和速度的影响,并提出了各参数的最优化数值.计算结果可为牵伸器内部结构的最优化设计提供理论依据,为提高长丝拉伸效率和拉伸速度给出了研究方向.

关键词：牵伸器 k-ε模型湍流模型数值模拟参数优化

The Ambiguity Function of MIMO Radar

在线全文

学校读者我要写书评

暂无评论

The Ambiguity Function of MIMO Radar

A New Evolutionary Algorithm Based on the Decimal Coding

IEEE 2007 International Symposium on Microwave,Antenna,Propagation and EMC Technologies for Wireless Communications(ISMAPE-2007)

作者： Qu jin you zhang JianYun Liu ChunQuan (HeFei Electronic Engineering Institute,HeFei 23007 China)

The ambiguity function of MIMO radar was presented from its own characteristics based on the ambiguity function of bistatic ***, right-angle coordinate system was built as reference system for MIMO ***,target coordinate and velocity were selected as variables of ambiguity ***,the ambiguity function of MIMO radar was got,which was a combination of the ambiguity function of bistatic *** ambiguity function of MIMO radar could directly determine the position of target and velocity and the resolution of the position is higher when more transmitters and receivers were *** ambiguity function of MIMO radar was unrelated to the reference point.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2002年第2期7卷 150-156页

作者： Dong Wen-yong, Li Yuan-xiang, Zheng Bo-jin, Zen San-you, zhang jin-bo State Key Laboratory of Software Engineering, Wuhan University, Wuhan 430072,Hubei, China Wuhan University State Key Laboratory of Software Engineering Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***)

Traditional Evolutionary Algorithm (EAs) is based on the binary code, real number code, structure code and so on. But these coding strategies have their own advantages and disadvantages for the optimization of functions. In this paper a new Decimal Coding Strategy (DCS), which is convenient for space division and alterable precision, was proposed, and the theory analysis of its implicit parallelism and convergence was also discussed. We also redesign several genetic operators for the decimal code. In order to utilize the historial information of the existing individuals in the process of evolution and avoid repeated exploring, the strategies of space shrinking and precision alterable, are adopted. Finally, the evolutionary algorithm based on decimal coding (DCEAs) was applied to the optimization of functions, the optimization of parameter, mixed-integer nonlinear programming. Comparison with traditional GAs was made and the experimental results show that the performances of DCEAS are better than the tradition GAs.

关键词： evolutionary algorithm function optimize genetic algorithm decimal coding CLC number TP 301.6

Synthesis and Luminescence Property of Hierarchical Europium Oxalate Micropaticles

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2011年第1期24卷 65-69,I0003,I0004页

作者：祝玮张悠金何红梅方智勇中国科学技术大学化学系合肥230026

Hierarchical europium oxalate Eu2（C2O4）3.10H2O micro-particles were synthesized through a simple precipitation method at room temperature in present of trisodium citrate. The products were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, and photoluminescence. The possible formation mechanism of the hierarchical europium oxalate Eu2（C2O4）3.10H2O micro-particles was discussed.

关键词： Hierarchy Europium oxalate Precipitation method Photoluminescence

Hydrothermal Synthesis of Rhombus-like SmCO3OH Microplates and Its Photoluminescence Property Doped with Eu^3＋

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2010年第1期23卷 102-106,I0002页

作者：尹小斌张悠金方志勇徐振宇中国科学技术大学化学系合肥230026

Rhombus-like SmCO3OH microplates with the edge lengths ranging from 5 μm to 10 μm and the thickness about 1.5 μm were synthesized through a simple hydrothermal method using urea as the precipitance. The structure and properties of the rhombus-like SmCO3OH microplates were characterized by X-ray diffraction, field-emission scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The optical property of the rhombus-like SmCO3OH microplates doped with Eu^3＋ was investigated by photoluminescence. A broad and strong emission band at 677 nm was obtained, which can be contributed to producing light conversion film.

关键词： SmCO3OH Hydrothermal method Photoluminescence

NEW　OSCILLATING　REACTIONS　CATALYZED　BY　TETRAMETHYLTETRAAZACYCLOTETRAENE　（TIM）NICKEL（Ⅱ）COMPLEX　IN　BROMATE－PYRUVIC　ACID　──SULFURIC　ACID　SYSTEM

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1994年第4期5卷 295-298页

作者： you jin zhang(Dept. of Processing, Hefei Economical and Technological College, Hefei 230052)Zhi Qiang XU Liang ZHAO Nai Liang HU Fu Xin XIE Shi Sheng NI(Dept. of Chemistry, Anhui University, Hefei 230039)(National Key Lab. of Coord. Chem. in Nanjing U

New oscillating reaction with the participation of a macrocyclic nickel(Ⅱ) complex ion [Ni(TIM )]2+ as catalyst and pyruvic acid as organic substrate in acidic bromate medium are described' This complex ion contains the ligand: 2, 3,9, 10-tetramethyl - 1, 4, 8, 11 - tetraazacyclotetradeca - 1, 3, 8, 10 - tetraene. The [Ni (TIM ) ]2+ion can undergo oxidation reaction of Ni (Ⅱ ) Ni (Ⅲ ). Detailed research on the system's oscillation characters and influential factors is made and the mechanism is briefly discussed.

关键词： ACID PYRUVIC SULFURIC NICKEL TIM BROMATE