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characteristics of Rock Mechanics Response and Energy Evolution Regime of Deep Reservoirs in the Bozhong Sag,Bohai Bay Basin

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Energy Engineering 2024年第9期121卷 2505-2524页

作者： Suogui Shang Kechao Gao QingbinWang Xinghua Zhang Pengli Zhou Jianhua Li Peng Chu Tianjin Branch of CNOOC Limited Tianjin300459China Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyShenzhen UniversityShenzhen518060China College of Civil and Transportation Engineering Shenzhen Key Laboratory of Deep Engineering Sciences and Green EnergyShenzhen UniversityShenzhen518060China

Hydraulic fracturing is a mature and effectivemethod for deep oil and gas production,which provides a foundation for deep oil and gas *** of the key aspects of implementing hydraulic fracturing technology lies in understanding mechanics response characteristics of rocks in deep reservoirs under complex stress *** this work,based on outcrop core samples,high-stress triaxial compression tests were designed to simulate the rock mechanics behavior of deep reservoirs in Bozhong ***,this study analyzes the deformation and damage law for rock under different stress ***,with a particular focus on combining energy dissipation theory to further understand damage law for deep *** experimental results show that regardless of stress conditions,the process of deformation/failure of deep-seated reservoirs goes through five stages:Fracture compaction,newfracture formation,stable fracture expansion,unstable fracture expansion,and post-peak residual *** different stress conditions,the energy change laws of specimens are *** energy dissipation process of rocks corresponds closely to the trend of deformation-failure curve,then displays distinctive stage ***,in stage of rock fracture compaction,the input energy curve is approximately coincident with the elastic strain energy curve,while the dissipation energy curve remains near *** the increase of strain,the growth rate of elastic strain energy increases gradually,but with the deformation entering the crack propagation stage,the growth rate of elastic strain energy slows down and the dissipation energy increases ***,in the post-peak stage,rock fracture releases a lot of energy,which leads to the sharp decline of elastic strain energy *** addition,the introduction of damage variable D quantifies the analysis of the extent of failure for *** the process of increasing strain,rock damage exhibits nonlinear

关键词： Deep rock mechanics triaxial compression energy dissipation damage variable

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Building an Academic System of Legal Science with Chinese characteristics

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Frontiers of Law in China-Selected Publications from Chinese Universities 2024年第3期19卷 228-244页

作者： WANG Yi Law School Renmin University of China Beijing 100872China

The report to the 20th National Congress of the Communist Party of China (CPC) pointed out that problems are the voice of the times, and answering the problems and guiding the solutions are the fundamental tasks of theories. To continually promote theoretical innovation on the basis of practice and to write a new chapter on adapting Marxism to the Chinese context and the needs of the times, it is necessary to persist in problem orientation. Therefore, it is a requirement for the implementation of the guiding principles of the 20th National Congress of the CPC to engage in intellectual inquiry with respect to meta-jurisprudence, and, based on that, pursue the target of building an academic system of legal science with Chinese characteristics. There are two main types of problems in meta-jurisprudence. The first is ideological resources, which asks what kinds of ideas shape the direction, foresight, and preferences of legal scholars. The second is the analytic framework, which asks how to tell the different kinds of legal issues apart, finish building the system, choose the best ways to argue, and make strong arguments. Only by starting from the problems of meta-jurisprudence and adhering to the guidance of XI Jinping Thought on the Rule of Law, by combining China's specific rule-of-law practice with fine traditional Chinese legal culture, and by learning from international experience, can the mission of building an academic system of legal science with Chinese characteristics be achieved.

关键词： XI Jinping Thought on the Rule of Law academic system of legal science problem-orientation ideological resources analytical framework

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Analysis of characteristics of a Heavy Rainstorm Process in Nanchang City on July 7,2020

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Meteorological and Environmental Research 2024年第1期15卷 1-7,11页

作者： Fengling ZENG Landi ZHONG Minghua MENG Chongqing Branch Southwest Air Traffic Management BureauCivil Aviation Administration of ChinaChongqing 401120China Nanchang Meteorological Bureau Nanchang 330038China

Based on the conventional observation data,dual polarization radar data and NCEP reanalysis data,the large-scale circulation background field,mesoscale conditions and formation causes of a heavy rainstorm in Nanchang on July 7,2020 were *** was found that this heavy rainstorm occurred under the weather background of the confrontation between the northward air flow behind the trough and the strong southwest warm and humid air flow to the northwest of the subtropical *** divergence at the upper level,the shear in the middle and low levels,the southward movement of cold air at the low level,unusually abundant water vapor and high unstable energy caused the heavy rainstorm *** this process,under the influence of continuous eastward movement of several strong echo cells,an obvious"train effect"was formed in Nanchang,so that the local rainfall was continuous and ***,the average of VIL was about 17 kg/m 2,and its variation characteristics were consistent with the variation trend of 5-min rainfall intensity,which had a certain indicator effect on short-term heavy *** topography of the Meiling Mountain in the west of Nanchang had a great influence on the formation and precipitation distribution of the heavy rain *** was a strong rainstorm center near the mountain,and the precipitation was obviously larger than that in the plain area.

关键词： Short-term heavy precipitation Mesoscale system Train effect Meiling landform

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Research on the Relationship between the School-Running characteristics of Private Colleges and Universities and the Development Objectives of the Government

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Journal of Contemporary Educational Research 2024年第9期8卷 296-302页

作者： Lishuxian Zhao Xiaoxia Wu Zhuolin Zhu Nanjing Tech University Pujiang Institute Nanjing 211200Jiangsu ProvinceChina

The development objectives of the Chinese government have a guiding effect on the school-running characteristics of private colleges and *** paper explores the relationship between the characteristics of private colleges and universities and the development objectives of the provincial government,using Jiangsu Province as a case *** the schools have the consciousness of fully considering the development objectives of Jiangsu Province when formulating the school-running *** characteristics all contain some training methods,training courses,or institutional construction aiming at the development *** universities can support the government’s objectives on employment and *** a third of the schools provide government support for science *** colleges and universities should make full use of the free and flexible advantages of private education,combine them with the continuous changes of policies and markets,and create clear,scientific,and dynamic school-running characteristics,in order to achieve long-term development.

关键词： Development objectives of the government School-running characteristics Chinese Private colleges and universities

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Investigation on the characteristics and mechanism of AZ80A magnesium alloy corrosion by Halon 1301 and CF_(3)I

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Aerospace Traffic and Safety 2024年第1期1卷 73-83页

作者： Xin Huang Huilin Bai Yujia Huo Xiaomeng Zhou Center for Aircraft Fire and Emergency Civil Aviation University of ChinaTianjin 300300PR China

In order to study the application of gas fire extinguishing agents in civil aircraft fire extinguishing systems,the corrosion characteristics and mechanisms of Halon 1301 and CF_(3)I on AZ80A magnesium alloy were comparatively *** experimental methods combined with density functional theory were applied to explore the corrosion *** results indicate that Halon 1301 and CF_(3)I exhibit good compatibility with AZ80A magnesium alloy through physical adsorption at room temperature and pressure,where Halon 1301 has a more stable adsorption ***,with increasing temperature,pyrolysis reactions occur leading to the formation of fluorine containing corrosive substances which can react with magnesium alloy to generate the corrosion production of MgF_(2) and *** MgF_(2) and coke can partically reduce reaction rates and protect against corrosion,the presence of MgF_(2) promotes further pyrolysis,generating more corrosion ***,the accumulation of corrosion products leads to a loss of metallic luster and a decline in mechanical properties of magnesium alloy along with interfacial cracking due to mutual extrusion between MgF_(2) and carbon deposition *** studies offer theoretical guidance for utilizing CF_(3)I in civil aircraft fire extinguishing systems while facilitating rapid screening for efficient clean gas extinguishing agents.

关键词： Gas fire extinguishing agents AZ80A magnesium alloy Corrosion products Corrosion mechanism CF_(3)I

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The influence of the sand-dust environment on air-gap breakdown discharge characteristics of the plate-to-plate electrode

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Science China(Physics,Mechanics & Astronomy) 2010年第3期53卷 458-464页

作者： HE Bo1, ZHANG Gang1, CHEN BangFa1, GAO NaiKui1, LI YaoZhong2, PENG ZongRen1 & JIN HaiYun1 1 State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China 2 Xinjiang Electric Power Research Institute, Urumqi 830011, China State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University Xi’an China Xinjiang Electric Power Research Institute Urumqi China

The experiments of plane-plane gap discharge was carried out in an environment of artificial sandstorm. By comparing and analyzing the differences in gap breakdown voltage between the sand & dust environment and clean air, some problems were investigated, such as effects of wind speed and particle concentration on the breakdown voltage, differences of gap discharge characteristics between the dust & sand medium and the clean air medium. The results showed that compared with the clean air environment, the dust & sand environment had a decreased gap breakdown voltage. The longer the gap distance, the greater the voltage drop; the breakdown voltage decreased with the increase of particle concentration in flow. With the increase of wind speed, the breakdown voltage decreased at the beginning and rose afterwards. The results of the paper may helpful for further research regarding the unidentified flashover and external insulation characteristics of the HV power grid in the dust & sand environment.

关键词： external insulation air-gap breakdown sand-dust flow simulation experiment

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characteristics of Elemental Composition of PM_(2.5) in the Spring Period at Tongyu in the Semi-arid Region of Northeast China

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Advances in Atmospheric Sciences 2008年第6期25卷 922-931页

作者：张仁健符淙斌韩志伟朱崇抒 Key Laboratory of Regional Climate-Environment Research for Temperate East Asia Institute of Atmospheric Physics Chinese Academy of Sciences START Regional Center for Temperate East Asia SKLLQG Institute of Earth Environment Chinese Academy of Sciences

Continuous observations of mass concentration and elemental composition of aerosol particles （PM2.5） were conducted at Tongyu, a semi-arid site in Northeast China in the spring of 2006. The average mass concentration of PM2.5 at Tongyu station was 260.9±274.4 μg m^-3 during the observation period. Nine dust events were monitored with a mean concentration of 528.0±302.7 μgm^-3. The PM2.5 level during non- dust storm （NDS） period was 111.65±63.37 μg m^-3. High mass concentration shows that fine-size particles pollution was very serious in the semi-arid area in Northeast China. The enrichment factor values for crust elements during the dust storm （DS） period are close to those in the NDS period, while the enrichment factor values for pollution elements during the NDS period are much higher than those in the DS period, showing these elements were from anthropogenic sources. The ratios of dust elements to Fe were relative constant during the DS period. The Ca/Fe ratio in dust aerosols at Tongyu is remarkably different from that observed in other source regions and downwind regions. Meteorological analysis shows that dust events at Tongyu are usually associated with dry, low pressure and high wind speed weather conditions. Air mass back-trajectory analysis identified three kinds of general pathways were associated with the aerosol particle transport to Tongyu, and the northwest direction pathway was the main transport route.

关键词： dust aerosol mass concentration elemental composition transport pathway

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Geochemical characteristics and diagenetic systems of dolomite reservoirs of the Changxing Formation in the eastern Sichuan Basin, China

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Petroleum Science 2012年第2期9卷 141-153页

作者： Zhang Bing Zheng Rongcai Wang Xuben Zheng Chao Wen Huaguo Luo Yuan Chi Yuelong State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering Chengdu University of TechnologySichuan 610059China Chongqing Gas Mine PetroChina Southwest Oil and Gasfield CompanyChongqing 401120China Sichuan Science and Technology Worker University Sichuan 610059China

In order to discuss the relationship between dolomite reservoirs and diagenetic systems of the Changxing Formation, we studied carbon, oxygen and strontium stable isotopes, iron, manganese and strontium trace elements and the Mg/Ca （mol%） ratio, dolomite order degree, and determined that burial dolomitization is the key to controlling the distribution of high quality dolomite reservoir in the Changxing Formation in the eastern Sichuan Basin. The dolomite of the Changxing Formation is divided into four diagenetic systems：（1） penecontemporaneous stage syngenetic brine diagenetic system, （2） early diagenetic stage strata seal brine diagenetic system, （3） middle-late diagenetic stage mixed hot brine diagenetic system and （4） tectonic uplift stage mixed hydrothermal fluid diagenetic system. New understanding of the controlling factors and distribution of dolomite reservoir development is discussed. Reef shoal facies belts controlled regional reservoir distribution and the scale of development. Burial dolomitization of a strata seal brine diagenetic system is the foundation of reservoir development, mainly developing pore reservoir. Burial dolomitization of mixed hot brine diagenetic system expanded the reservoir distribution and improved the reservoir quality, mainly developing pore-vug reservoir. Fracturing and dissolution of a mixed hydrothermal fluid diagenetic system is the key to improving the reservoir quality, mainly developing pore-vug-crack complex reservoirs.

关键词： Eastern Sichuan Basin Changxing Formation dolomite reservoir diagenesis geochemical characteristics diagenetic system

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Study on the production characteristics of(131)^I and(90)^Sr isotopes in a molten salt reactor

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Nuclear Science and Techniques 2021年第3期32卷 120-128页

作者： Liang Chen Rui Yan Xu-Zhong Kang Gui-Feng Zhu Bo Zhou Liao-Yuan He Yang Zou Hong-Jie Xu Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China

The production of radionuclides(90)^Sr and(131)^I in molten salt reactors is an attractive option to address the global shortage of *** study evaluated the production characteristics of(90)^Sr and(131)^I in a modular molten salt reactor,such as equilibrium time,yield,and cooling time of isotopic *** fuel burn-up of a small modular molten salt reactor was analyzed by the Triton module of the scale program,and the variation in the fission yields of the two nuclides and their precursors with burn-up *** yield of(131)^I and~(131)Te has been increasing during the lifetime.131 I has an equilibrium time of about 40 days,a saturation activity of about 40,300 TBq,and while~(131)Te takes 250 min to reach equilibrium,the equilibrium activity was about 38,000 *** yields of90 Sr and~(90)Kr decreased gradually,the equilibrium time of90 Kr was short,and(90)^Sr could not reach *** on the experimental data of molten salt reactor experiment,the amount of nuclide migration to the tail gas and the corresponding cooling time of the isotope impurities under different extraction methods were *** the HF-H_2 bubbling method,3.49×10^(5)TBq of(131)^I can be extracted from molten salt every year,and after13 days of cooling,the impurity content meets the medical *** the electric field method,1296 TBq of(131)^I can be extracted from the off-gas system(its cooling time is 11 days)and 109 TBq of(90)^*** yields per unit power for(131)^I and(90)^Sr is approximately 1350 TBq/MW and 530 TBq/MW,respectively,which shows that molten salt reactors have a high economic value.

关键词： Molten salt reactor (131)^I (90)^Sr Nuclide production

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Influence of spacer insulator material temperature characteristics on its electric properties

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Global Energy Interconnection 2019年第1期2卷 71-77页

作者： Yuyi Wu Chengyu Wang Yun Chen Boyuan Cui China Electric Power Research Institute

Spacer insulators are important insulating component of gas insulated switchgear(GIS). In order to analyze the influence of spacer insulator materials temperature characteristics on the electric performance, we tested the temperature distribution under work condition and the temperature characteristics of the material's relative permittivity. Then established a spacer insulator simulation model in finite element numerical simulation software to calculate its temperature and electric field. Using the temperature test results as a reference to verify the temperature calculation, and in order to analyze changes of the electric field along the surface of the spacer insulator, the temperature characteristics of relative permittivity have to be considered. Through the experimental research and simulation analysis, we found that the temperature characteristics of the spacer insulator materials have great impacts on the spacer insulator performance. When the temperature increases, the material relative permittivity also increases. In the low-temperature region of spacer insulator, the electric field intensity along the surface increases, so the electrical performance deteriorates. The conclusion of this paper can provide an important reference for further research about spacer insulator's working performance analysis.

关键词： Spacer insulator Epoxy resin formulations Temperature characteristics Finite element simulation

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