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Applying terahertz time-domain spectroscopy to probe the evolution of kerogen in close pyrolysis systems

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Science China(Physics,Mechanics & Astronomy) 2013年第8期56卷 1603-1605页

作者： bao rima WU ShiXiang ZHAO Kun ZHENG LunJu XU ChangHong College of Science China University of Petroleum Petroleum Exploration and Production Research Institute China Petroleum and Chemical Corporation Exploration and Production Research Institute China Petroleum and Chemical Corporation

Terahertz time-domain spectroscopy (THz-TDS) has been used to probe the evolutionary paths of kerogen in selected black mudstone. The evolutionary regime of kerogens (for instance, the immaturity, early maturity, middle maturity, late maturity, and catagenesis stages) can be indicated by the absorption coefficient in the THz region. The present study of identification based on THz-TDS was in good agreement with programmed pyrolysis experiments and suggests that THz technology can act as a nondestructive, contact-free tool for probing the ability to generate hydrocarbons from kerogens.

关键词： evolution kerogen terahertz spectroscopy

Less than 6 GHz resolution THz spectroscopy of water vapor

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Science China(Technological Sciences) 2015年第12期58卷 2104-2109页

作者： ZHAN HongLei SUN ShiNing ZHAO Kun LENG WenXiu bao rima XIAO LiZhi ZHANG ZhenWei State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum Department of Physics Capital Normal University

The application of terahertz（THz） technique in many fields like petroleum industry requires the high resolution and multifunction to realize the precise detection of different materials. In this study water vapor in atmosphere was scanned with shortand long-path THz spectrometers with different scan ranges. The full width at half maximum of the THz characteristic lines in long-path system reached less than 7 GHz and that in short achieved -5.5 GHz, indicating that the THz spectroscopy of water vapor can be used to calibrate THz devices. THz systems with right scan ranges could be a promising selection for the identification of solid, liquid and gaseous materials with very similar structures due to the high resolution. The research demonstrates that the multifunctional THz test can be realized through the balance of resolution and sampling space in many fields, such as oil-gas industry.

关键词： terahertz water vapor resolution full width at half maximum

Terahertz assessment of the atmospheric pollution during the first-ever red alert period in Beijing

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Science China(Physics,Mechanics & Astronomy) 2017年第4期60卷 74-77页

作者： HongLei Zhan Ning Li Kun Zhao ZhenWei Zhang CunLin Zhang rima bao Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum Department of Physics Capital Normal University

Haze or smog episodes, which are characterized by the presence of particulate matter at diameters less than 2.5 μm （PM2.5）, have attracted increasing attention during the past few decades [ 1 ]. PM2.5 has adverse effects on human respiratory health as well as on air visibility [2,3]. In the Beijing-Tianjin-Hebei （BTH） region of China, haze has become especially serious in recent years because of industrial expansion and traffic-related emissions [4,5] （http：//***/english/2016-01/07/c_***; http：// ***/html/2016-01/07/content_***）. To protect public health, the first-ever red alert for smog in China was issued by the Beijing municipal environmental protection bureau （MEPB）,

关键词： Terahertz assessment of the atmospheric pollution during the first-ever red alert period in Beijing

Real-time monitoring the formation and decomposition processes of methane hydrate with THz spectroscopy

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Science China(Physics,Mechanics & Astronomy) 2017年第1期60卷 72-73页

作者： XinYang Miao ShiNing Sun YiZhang Li Wei Wang rima bao Kun Zhao Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum Beijing 102249 China

Gas hydrates are crystalline clathrate compounds comprised of hydrogen-bonded water cavities, consisting of guest molecules trapped in a lattice of polyhedral water cages under elevated pressures and low temperatures [1]. The structures of the gas hydrates are closely related to the types and sizes of the guest species, and three distinct structures, including cubic structure-I （sI）, hexagonal structure-H （sH）, are cubic structure-II （sII）, and known to form [2].

关键词： hexagonal crystalline trapped cubic hydrate guest sizes methane comprised bonded

Characterizing the rock geological time by terahertz spectrum

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Science China(Physics,Mechanics & Astronomy) 2019年第1期62卷 95-98页

作者： WenXiu Leng QingYan Li rima bao Kun Zhao XinYang Miao YiZhang Li Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum

In the field of geology,it is necessary to get the information about the rock geological time,which includes absolute geologic age and relative geologic age .Tracing the evolutionary history of the earth is one of the research tasks of earth ***,space,material and motivation are the basic elements for studying geological processes and enviromnental evolution,and time is the basis for studying geological problems.A clear understanding of the interaction between the above elements will be able to clearly make sure the evolution of the earth and the conditions of rock ***,it is urgent to get the geochronological data of rocks for wide range comparison,so as to study the evolution trend and development rule of the earth's crust .

关键词： Characterizing geology understanding

Probing the oil content in oil shale with terahertz spectroscopy

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Science China(Physics,Mechanics & Astronomy) 2015年第11期58卷 121-122页

作者： bao rima LI YiZhang ZHAN HongLei ZHAO Kun WANG Wei MA Yue WU JianXun LIU ShaoHua LI ShuYuan XIAO LiZhi State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum

Dear Editors, The merit of coal has been recognized by average people, whereas the value of oil shale has not been realized even by some experts in energy field. Compared to coal, oil shale also has dark looks and giant reserves while the content of ash in oil shale is higher. Owing to organic matter it con- tains, a sort of fuel named shale oil can be extracted via pyrolysis, which resembles crude oil in composition and can be further processed to obtain gas and diesel .

关键词：科学学科学知识物理学力学天文学

浅黄根须腹菌磷酸盐转运蛋白基因克隆及表达分析

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分子植物育种 2017年第6期15卷 2179-2186页

作者：宝日玛峥嵘白淑兰内蒙古师范大学生命科学与技术学院呼和浩特010022 内蒙古农业大学林学院呼和浩特010019

研究以油松(Pinus tabulaeformis)的优良外生菌根真菌-浅黄根须腹菌(Rhizopogon luteolus)菌丝体为对象,采用简并PCR和末端克隆技术分离了其磷酸盐转运蛋白基因(RlPT),所分离的RlPT cDNA全长序列2017 bp,包含一个1 653 bp的开放阅读框(o... 详细信息

研究以油松(Pinus tabulaeformis)的优良外生菌根真菌-浅黄根须腹菌(Rhizopogon luteolus)菌丝体为对象,采用简并PCR和末端克隆技术分离了其磷酸盐转运蛋白基因(RlPT),所分离的RlPT cDNA全长序列2017 bp,包含一个1 653 bp的开放阅读框(open reading frame,ORF),编码550个氨基酸;基因组DNA长度约为2 324 bp,包含11外显子和10个内含子,保守结构域搜索显示属于MFS超基因家族。结果表明:蛋白序列的系统进化树显示与浅黄根须腹菌(Rhizopogon luteolus)的磷酸盐转运蛋白的亲缘关系最近。qPCR分析显示在磷饥饿时,该基因表达显著提高。

关键词：浅黄根须腹菌磷酸盐转运蛋白克隆

Protein acetylation sites with complex-valued polynomial model

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Frontiers of Computer Science 2024年第3期18卷 217-226页

作者： Wenzheng bao Bin YANG School of Information Engineering Xuzhou University of TechnologyXuzhou 221018China School of Information Science and Engineering Zaozhuang UniversityZaozhuang 277160China

Protein acetylation refers to a process of adding acetyl groups(CH3CO-)to lysine residues on protein *** one of the most commonly used protein post-translational modifications,lysine acetylation plays an important role in different *** our study,we developed a humanspecific method which uses a cascade classifier of complexvalued polynomial model(CVPM),combined with sequence and structural feature descriptors to solve the problem of imbalance between positive and negative *** gene expression programming and differential evolution are utilized to search the optimal CVPM *** also made a systematic and comprehensive analysis of the acetylation data and the prediction *** performances of our proposed method are 79.15%in Sp,78.17%in Sn,78.66%in ACC 78.76%in F1,and 0.5733 in MCC,which performs better than other state-of-the-art methods.

关键词： protein acetylation complex-valued polynomial model machine learning

New steelmaking process based on clean deoxidation technology

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1249-1262页

作者： Zhongliang Wang Yanping bao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

After the converter steelmaking process,a considerable number of ferroalloys are needed to remove dissolved oxygen from the molten steel,but it also forms a lot of oxide inclusions that cannot be completely *** the same time,it increases the carbon emis-sions in the steel production *** years of research,our team have developed a series of clean deoxidation technologies,includ-ing carbon deoxidation,hydrogen deoxidation,and waste plastic deoxidation of molten steel to address the aforementioned *** this study,thermodynamic calculations and laboratory experiments were employed to verify that carbon and hydrogen can reduce the total oxygen content in the molten steel melt to below 5×10^(-6) and 10×10^(-6),*** analysis of the deoxidation mechanisms and ef-fects of polyethylene and polypropylene was also *** addition,the applications of carbon deoxidation technology in different steels with the hot-state experiment and industrial production were discussed *** carbon deoxidation experimental results of different steels were as follows:(1)the oxygen content of bearing steel was effectively controlled at 6.3×10^(-6) and the inclusion number density was lowered by 74.73%compared to aluminum deoxidized bearing steel;(2)the oxygen content in gear steel was reduced to 7.7×10^(-6) and a 54.49%reduction of inclusion number density was achieved with almost no inclusions larger than 5μm from the average level of industry gear steels;(3)a total oxygen content of M2 high-speed steel was as low as 3.7×10^(-6).In industrial production practice,car-bon deoxidation technique was applied in the final deoxidation stage for non-aluminum deoxidized bearing steel,and it yielded excellent results that the oxygen content was reduced to below 8×10^(-6) and the oxide inclusions in the steel mainly consist of silicates,along with small amounts of spinel and calcium aluminate.

关键词： clean deoxidation carbon deoxidation hydrogen deoxidation waste plastics deoxidation