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Relationship between nano-scale deformation of coal structure and metamorphic-deformed environments

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Science Bulletin 2005年第16期 114-125页

作者： JU yiwen1, 2. JIANG Bo1, HOU Quanlin2.& WANG Guiliang1 1. College of Mineral Resource and Geosciences, China University of Mining and Technology, Xuzhou 2.1008, China 2. Laboratory of Computational Geody.a.ics, College of Geosciences, Graduate University of Chinese Academy of Sciences, Beijing 100049, China

There is a more consanguineous relation be-tween nano-scale deformation of coal structure and meta-morphic-deformed environment. In different metamor-phic-deformed environments, deformation in the coal struc-ture can occur not only.a. micro-scale, but also at nano-scale, and even leads to the change of molecular structure and nano-scale pore (y diffraction (XRD) and liquid–nitrogen absorption methods, the charac-teristics of macromolecular and nano-scale pore structures of coals in different metamorphic-deformed environments and deformational series of coals have been studied. By combin-ing with high-resolution transmission electron microcopy (HRTEM), the macromolecular and nano-scale pore struc-tures are also directly observed. These results demonstrate that the stacking Lc of the macromolecular BSU in tectonic coals increases quickly from the metamorphic-deformed environment of low rank coals to that of high rank coals. For different deformed tectonic coals, in the same metamor-phic-deformed environment, the difference of Lc is obvious. These changes reflect chiefly the difference of different tem-perature and stress effect of nano-scale deformation in tec-tonic coals. The factor of temperature plays a greater role in the increase of macromolecular structure parameters Lc, the influence of stress factor is also important. With the stress strengthening, Lc shows an increasing trend, and La /Lc shows a decreasing trend. Therefore, Lc and La /Lc can be used as the indicator of nano-scale deformation degree of tectonic coals. With increasing temperature and pressure, especially oriented stress, the orientation of molecular structure be-comes stronger, and ordering degree of C-nets and the ar-rangement of BSU are obviously enhanced. For the deforma-tion of nano-scale pore structure, in the same metamor-phic-deformed environment, along with the strengthening of stress, the ratio of m

关键词： coal structure nano-scale deformation macromolecular structure pore structure metamorphic-deformed environment.

Hydrocarbon migration and accumulation along the fault intersection zone-a case study on the reef-flat systems of the No.1 slope break zone in the Tazhong area, Tarim Basin

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Petroleum Science 2010年第2期7卷 211-225页

作者： Xiang Caifu Pang Xiongqi yang Wenjing Wang Jianzhong LiQiming Liu Luofu Li yanqun State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China Basin and Reservoir Research Center School of Natural Resources and Information Technology China University ofPetroleum Beijing 102249 China PetroChina Tarim Oilfield Company Korla Xinjiang 841000 China

Understanding hydrocarbon migration and accumulation mechanisms is one of the key scientif ic problems that should be solved for effective hydrocarbon exploration in the superimposed basins developed in northwest China. The northwest striking No.1 slope break zone, which is a representative of superimposed basins in the Tarim Basin, can be divided into five parts due to the intersection of the northeast strike-slip faults. Controlled by the tectonic framework, the types and properties of reservoirs and the hydrocarbon compositions can also be divided into five parts from east to west. Anomalies of all the parameters were found on the fault intersection zone and weakened up-dip along the structural ridge away from it. Thus, it can be inferred that the intersection zone is the hydrocarbon charging position. This new conclusion differs greatly from the traditional viewpoint, which believes that the hydrocarbon migrates and accumulates along the whole plane of the No.1 slope break zone. The viewpoint is further supported by the evidence from the theory of main pathway systems, obvious improvement of the reservoir quality （2.3 orders of magnitude at the intersection zone） and the formation mechanisms of the fault intersection zone. Differential hydrocarbon migration and entrapment exists in and around the strike- slip faults. This is controlled by the internal structure of faults. It is concluded that the more complicated the fault structure is, the more significant the effects will be. If there is a deformation band, it will hinder the cross fault migration due to the common feature of two to four orders of magnitude reduction in permeability. Otherwise, hydrocarbons tend to accumulate in the up-dip structure under the control of buoyancy. Further research on the internal fault structure should be emphasized.

关键词： Geologic chromatographic effect fault intersection zone differential hydrocarbon migration and accumulation superimposed basin Tazhong area Tarim Basin

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锂离子电池负极材料钛酸锂的研究进展

无机材料学报 2018年第5期33卷 475-482页

作者：谭毅薛冰大连理工大学材料科学与工程学院大连116024 大连理工大学辽宁省太阳能光伏系统重点实验室大连116024

锂离子电池作为一种动力能源,在电动汽车和各种储能系统中有着良好的应用前景。尖晶石结构的钛酸锂(Li_4Ti_5O_(12.)负极材料具有较高的脱嵌锂电位平台、优异的循环稳定性、以及突出的安全性能,被认为是一种非常有潜力的锂离子电池负极... 详细信息

锂离子电池作为一种动力能源,在电动汽车和各种储能系统中有着良好的应用前景。尖晶石结构的钛酸锂(Li_4Ti_5O_(12.)负极材料具有较高的脱嵌锂电位平台、优异的循环稳定性、以及突出的安全性能,被认为是一种非常有潜力的锂离子电池负极材料,在锂离子动力电池中具有巨大的发展潜力。然而,尖晶石型Li_4Ti_5O_(12.存在着本征导电率低,理论容量小等缺陷,极大地限制了其规模化应用,需要进一步改善和提高。本文总结了尖晶石型Li_4Ti_5O_(12.材料在结构形貌、制备方法和性能方面的研究进展,深入分析和讨论了离子掺杂、碳表面改性和纳米化等改性方法对尖晶石型Li_4Ti_5O_(12.综合电化学性能的改善效果,并展望了尖晶石型Li_4Ti_5O_(12.作为锂离子电池负极材料未来的发展方向。

关键词：钛酸锂负极材料锂离子电池

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新型多载波光通信系统研究进展(特邀)

光通信研究 2024年第1期1期(12)卷 42-47页

作者：葛坚黄雍涛余建国中国信息通信研究院技术与标准研究所互联网中心北京100098 北京邮电大学电子工程学院北京100876

为了满足当前日益增长的通信容量需求,新型多载波光纤通信技术成为科研人员关注的焦点。文章回顾了近2.年来传统正交频分复用(OFDM)在光纤通信领域的发展历程,梳理了近年来滤波器组多载波(FBMC)和通用滤波多载波(UFMC)在光纤通信领域的... 详细信息

为了满足当前日益增长的通信容量需求,新型多载波光纤通信技术成为科研人员关注的焦点。文章回顾了近2.年来传统正交频分复用(OFDM)在光纤通信领域的发展历程,梳理了近年来滤波器组多载波(FBMC)和通用滤波多载波(UFMC)在光纤通信领域的相关研究。自2.16年以来,针对光通信中OFDM存在的问题,如:带外泄漏高、依赖循环前缀(CP),峰均功率比(PAPR)值过高和系统同步要求高等,国内外众多学者以新型多载波为突破口展开了研究。FBMC光通信具有旁瓣功率最低和频谱利用率高等特点,但是由于使用了偏移正交幅度调制(OQAM),对应的数字信号处理(DSP)算法需要针对虚部干扰重新设计。UFMC光通信具备强大的时间同步偏差容忍性,对频率偏移不敏感,可以复用OFDM的DSP算法,但也存在如何进一步抑制带外功率和降低计算复杂度等问题。最后,文章结合当前的研究现状,对下一代光纤通信系统的诉求提出了研究方向和建议。

关键词：多载波光通信正交频分复用滤波器组多载波通用滤波多载波

维普期刊数据库博看期刊

Regioselective aminohalogenation of β-nitrostyrenes using NCS and NBS as nitrogen/halogen sources

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Science China Chemistry 2010年第1期53卷 140-146页

作者： ZHI SanJun1,2.SUN Hao2.LIN Chen2.ZHANG GuangQian2.LI GuiGen4 & PAN yi2.3 1 Department of Chemistry,Huaiyin Normal University,Huai’an 2.1003,China 2.School of Chemistry.a.d Chemical Engineering,Nanjing University,Nanjing 2.0093,China 3 State Key Lab of Coordination Chemistry,Nanjing University,Nanjing 2.0093,China 4 Department of Chemistry.a.d Biochemistry,Texas Tech University,Lubbock,Texas 79409-1061,USA Department of Chemistry Huaiyin Normal University Huai’an China School of Chemistry.a.d Chemical Engineering Nanjing University Nanjing China Department of Chemistry.a.d Biochemistry Texas Tech University Lubbock USA State Key Lab of Coordination Chemistry Nanjing University Nanjing China

Aminohalogenation reaction of β-nitrostyrenes with N-halosuccinimides(N-chloro and N-bromosuccinimides) has been successfully conducted by using nickel acetate as a catalyst in the presence of potassium carbonate and succinimide as *** reaction was easily performed at room temperature under nitrogen gas protection to give dihalorinaed haloamino products in good to excellent yields(60%-98%).The structure has been confirmed by X-ray crystal structure analysis.

关键词： aminohalogenation vicinal haloamines β-nitrostyrenes NBS NCS

A Simple X-ray Spectrometer and PC-based Data Acquisition System for Newly Developed X-ray Source Based on Laser Compton Scattering

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原子核物理评论 2009年第S1期26卷 115-118页

作者： LUO Wen1,2.XU Wang1,,PAN Qiang-yan1,XU yi1,2.FAN Gong-tao1,2.FAN Guang-wei1,2.yANG Li-feng 1,2.LI yong-jiang1,2.yAN Zhe1,XU Ben-ji1(1 Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 2.1800,China 2.Graduate School of Chinese Academy of Sciences,Beijing 100049,China) Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Graduate School of Chinese Academy of Sciences Beijing 100049China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Graduate School of Chinese Academy of Sciences Beijing 100049China

A simple X-ray spectrometer and a PC-Based Data Acquisition System(DAS) have been developed newly in Shanghai Institute of Applied Physics(SINAP),Chinese Academy of Sciences(CAS) for the measurement of the X-ray source generated using laser Compton scattering. The system consists of liquid nitrogen cooled high resolution Si(Li) detector,electronics and a DAQ. The Si(Li) detector was designed and made by Center of Advanced Instruments in SINAP,CAS,it allows us to measure X-rays with the energy up to 60 keV and the energy resolution(FWHM) of 184 eV at 5.9 keV. We measured the system uncertainty was 0.2.eV and time drifting of detector was 0.05% both at 5.9 keV. The DAQ was based on Object-Oriented software LabVIEW 7.1,it has data on-line analysis and original data saved functions.

关键词： laser Compton scattering Si(Li) detector energy resolustion

Phase relationship of complex multi-component system in chromate cleaner production

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Progress in Natural Science:Materials International 2007年第7期17卷 845-850页

作者： Ge Xinlei~1 Wang Xidong~(1,3**) Zheng Shili~2.Zhang Mei~1 Zhang yi~2.(1.Department of Physical Chemistry,University of Science and Technology Beijing,Beijing 100083,China 2.Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100080,China 3.College of Engineering,Peking University,Beijing 100871,China) Department of Physical Chemistry University of Science and Technology Beijing Beijing 100083 China College of Engineering Peking University Beijing 100871 China Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 China

The phase relationships of the complex multi-component systems in the liquid-phase oxidization and separation process related with the chromate cleaner production are investigated theoretically.a.d *** phase diagram of main system Fe- Cr2.4-KOH-O2.f oxidization process and the relationship of its standard Gibbs free energy change with temperature are calculated.A se- ries of phase diagrams of the separation process at different temperatures,such as K（Na）OH-K（Na）2.rO4-H2.,KOH-KAlO2.H2., K（Na）OH-K（Na）2.O3-H2.,K（Na）OH-K（Na）HCO3-H2. and K（Na）HCO3-K（Na）2.rO4-H2. have also been *** ex- periments are carried out to verify the calculated *** results showed that the sub-molten salt media are suitable for the oxidization and separation processes;FeCr2.4can be oxidized across a wide range of temperature;K（Na）2.rO4can be separated from K（Na）AlO2.ystem at appropriate temperature and proper concentration;the crystallization of carbonate is easier than that of K（Na）2.rO4.

关键词： chromite chromate system thermody.a.ics calculation phase diagram

The non-destructive analysis of ancient jade artifacts unearthed from the Liangzhu sites at yuhang,Zhejiang

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Science China(Technological Sciences) 2010年第12期53卷 3404-3419页

作者： GAN FuXi1,3, CAO Jingyan2. CHENG HuanSheng3, Gu DongHong1, RUI Guoyao2. FANG XiangMing2. DONG JunQing1 & ZHAO HongXia1 1Scientific Archeology Center, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2.1800, China 2.Research Institute of Cultural Relics and Archeology of Zhejiang, Hangzhou 310014, China 3 Fudan University, Shanghai 2.0433, China Scientific Archeology Center Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai China Fudan University Shanghai China Research Institute of Cultural Relics and Archeology of Zhejiang Hangzhou China

Samples of the jade artifacts unearthed from the Liangzhu sites at yuhang (Fanshan,yaoshan, Huiguanshan and Tangshan) of Zhejiang province were described. The chemical composition, phase and jade structure of a hundred and more intact samples were analyzed by the non-destructive techniques of PIXE, XRD and laser Raman spectroscopy. Results showed that the minerals of the jade artifacts mostly belonged to tremolite and tremolite-actinolite. Relationship of the civilization development in the Neolithic age and the application of tremolite type mineral in jade artifacts was discussed. The contents of rare and trace elements in tremolite jade artfacts and in mineral samples were measured for the first time. The possible mineral sources of these tremolite type jade artifacts were discussed.

关键词： Liangzhu culture non-destructive analysis ancient jade artifacts essence and source

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形变奥氏体→铁素体转变的动力学研究

上海交通大学学报 2003年第12期37卷 1831-1834,1839页

作者：张斌张鸿冰宝钢集团上海第一钢铁有限公司技术中心上海200431 上海应用技术学院材料科学工程系上海200052

基于相变动力学和热力学原理,并根据Schieil叠加原理和热膨胀实验结果,建立了形变奥氏体(γ)→铁素体(α)连续冷却相变动力学行为的预测模型,将其应用于形变奥氏体后的控制冷却过程,可以计算出铁素体相变开始温度以及室温组织中的体积... 详细信息

基于相变动力学和热力学原理,并根据Schieil叠加原理和热膨胀实验结果,建立了形变奥氏体(γ)→铁素体(α)连续冷却相变动力学行为的预测模型,将其应用于形变奥氏体后的控制冷却过程,可以计算出铁素体相变开始温度以及室温组织中的体积分数等参数.该方法的计算模拟结果与实测结果吻合很好,表明这种理论的计算方法是可行的.

关键词：相变动力学奥氏体铁素体体积分数相变开始温度