检索结果-南通市图书馆

Overpressure and gas charging in tight sandstone:Xujiahe Formation,northeastern Sichuan Basin

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2022年第6期19卷 2583-2600页

作者： jing-dong liu Cun-Jian Zhang You-Lu Jiang Guo-Shuai Bai Shandong Provincial Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)QingdaoShandong266580China Shandong Provincial Key Laboratory of Reservoir Geology China University of Petroleum(East China)QingdaoShandong266580China School of Geosciences China University of Petroleum(East China)QingdaoShandong266580China

Overpressure is a key factor for oil and gas charging in tight reservoirs,but it is still a challenge to evaluate the overpressure evolution and its control on oil and gas *** Xujiahe Formation in the northeastern Sichuan Basin as an example,this paper presented a method for evaluating overpressure and its effect on natural gas charging in tight sandstone in compressional *** abnormally high pressure and its causes were analyzed by measured data and logging *** calculation and PVT simulation were used to investigate the amounts of overpressure resulted from hydrocarbon generation and tecto nic compression,*** the source rock-reservoir pressu re differences were calculated and the characteristics of natural gas charging during the natural gas charging periods were *** was revealed that hydrocarbon generation and tectonic compression were the main causes of the *** overpressure of both source rocks and reservoir exhibited a gradually increasing trend from Middle Jurassic to Early Cretaceous(J2-K1),then decreased since Later Cretaceous(K2),and some of that preserved to *** contributions of the hydrocarbon generation and tectonic compression to overpressure were different in different *** residual pressure difference between the source rocks and the reservoir is the major driving force for tight sandstone gas *** main hydrocarbon generating area of the source rocks and the area of high driving force were major natural gas enrichment areas,and the driving force determined the natural gas charging space in the pore throat system of the *** research helps evaluate the overpressure and pressure difference between source rocks and reservoir in compressed basin,as well as investigate the effective pore throat space of tight gas charging by the driver of overpressure.

关键词： Tight sandstone gas Overpressure Hydrocarbon generation Tectonic compression Driving force for tight gas charging Sichuan Basin

Syntheses and Crystal Structures of Calix[4]arene Dithiocarbazate Schiff Bases

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2010年第4期26卷 572-577页

作者： SUN jing liu dong-mei WANG Jin-xiang YAN Chao-guo College of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 P. R. China

The regioselective syntheses of novel p-tert-butylcalix[4]arenes with functional aldehyde and dithiocarbazate Schiff base groups were carried out. p-tert-Butylcalix[4]arene was alkylated with o-, p-（ω-chloroalkoxy）- benzaldehydes in the system of K2CO3/KI/CH3CN to give calixarene 1,3-dialdehydes. Then the condensation reactions of active calixarene aldehydes with S-methyl and S-benzyldithiocarbazate, calixarene sulfur-containing Schiff bases were efficiently obtained in satisfied yields. The single crystal analysis of the four representative products shows that calixarene aldehydes and Schiff bases exist in cone conformation and there are interesting intermolecular hydrogen-bands and π...π interaction in the crystals.

关键词： Calixarene Alkvlation S-Alkvldithiocarbazate Schiff base: Crystal structure

Research on the measurement and shielding methods of the spatial electromagnetic radiation of the BEPCⅡLinac

在线全文

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2022年第2期6卷 187-193页

作者： Hua Shi Xiang He jing-dong liu jing-Ru Zhang Xiao-Ping Li National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Purpose The research focuses on the related measurement and shielding works for solving the spatial electromagnetic radiation and interference problems of the BEPCⅡ*** The radiation frequency and intensity can be determined by using a set of antennas connected with a spectrum *** The source of the radiation is located on the cable connectors of some device *** radiation intensity is significantly reduced after wrapping the connectors with the radiation shielding *** The entire research process includes the selection of a domestically made ultra-wideband antenna,the proposal of the measurement methods,the locating of the radiation source,the performance measurement of the radiation shielding tape and the shielding of the *** provides a whole set of feasible solutions for similar problems in accelerators.

关键词： BEPCⅡ Linac Spatial electromagnetic radiation Radiation measurement Radiation shielding Ultra-wideband antenna

System design and measurements of flux concentrator and its solid-state modulator for CEPC positron source

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

Nuclear Science and Techniques 2021年第7期32卷 108-117页

作者： jing-dong liu Xiao-Ping Li Cai Meng Yun-Long Chi Guo-Xi Pei Da-Yong He jing-Yi Li Xian-jing Sun jing-Ru Zhang Lei Shang Jian-Bin Zhu National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Positron sources are one of the most important components of the injector of a circular electron positron collector(CEPC).The CEPC is designed as an e^(+)e^(−)collider for a Higgs *** accelerator system is composed of 100-km-long storage rings and an *** design goal of the positron source is to obtain positron beams with a bunch charge of 3 *** flux concentrator(FC)is one of the cores of the positron *** paper reports the design,development,and measurements of an FC prototype *** prototype includes an FC and an all-solid-state high-current pulse *** tests show that the peak current on the FC can reach 15.5 kA,and the peak magnetic field can reach 6.2 *** test results are consistent with the theoretical *** FC system fulfills the requirements of the CEPC positron source as well as provides a reference for the development of similar devices both domestically and abroad.

关键词： CEPC positron source Flux concentrator Solid-state modulator High current Peak magnetic field

Hydrocarbon charge history of the Paleogene reservoir in the northern dongpu Depression,Bohai Bay Basin,China

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2016年第4期13卷 625-641页

作者： You-Lu Jiang Lei Fang jing-dong liu Hong-Jin Hu Tian-Wu Xu School of Geosciences China University of PetroleumQingdao 266580ShandongChina CNOOC Research Institute Beijing 100028China SINOPEC Zhongyuan Oil Company Puyang 457001HenanChina

The hydrocarbon charge history of the Paleogene in the northern dongpu Depression was analyzed in detail based on a comprehensive analysis of the generation and expulsion history of the major hydrocarbon source rocks, fluorescence microscopic features and fluid inclusion petrography. There were two main stages of hydrocarbon generation and expulsion of oil from the major hydrocarbon source rocks. The first stage was the main hydrocarbon expulsion stage. The fluorescence microscopic features also indicated two stages of hydrocarbon accumulation. Carbonaceous bitumen, asphaltene bitumen and colloidal bitumen reflected an early hydrocarbon charge, whereas the oil bitumen reflected a second hydrocarbon charge. Hydrocarbon inclusions also indicate two distinct charges according to the diagenetic evolution sequence, inclusion petrography features combined with the homogenization temperature and reservoir burial history analysis. According to these comprehensive analysis results, the hydrocarbon charge history of the Paleogene reservoir in the northern dongpu Depression was divided into two phases. The first phase was from the late dongying depositional period of the Oligocene to the early uplift stages of the late Paleogene. The second phase was from the late Minghuazhen period of the Pliocene to the Quaternary. Reservoirs formed during the first period were widely distributed covering the entire area. In contrast,reservoirs formed during the second period were mainly distributed near the hydrocarbon generation sags. Vertically, it was characterized by a single phase in the upper layers and two phases in the lower layers of the Paleogene.

关键词： dongpu Depression Hydrocarbon charge history Hydrocarbon generation and expulsion history Fluid inclusion Petrography Fluorescence microscopy

Coupling relationship between reservoir diagenesis and hydrocarbon accumulation in Lower Cretaceous Yingcheng Formation of dongling,Changling fault depression,Songliao Basin,Northeast China

在线全文

学校读者我要写书评

暂无评论

China Geology 2020年第2期3卷 247-261页

作者： Yun-qian Lu You-lu Jiang Wei Wang Jian-feng Du jing-dong liu Guangzhou Marine Geological Survey China Geological SurveyMinistry of Natural ResourcesGuangzhou 510075China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China School of Geosciences China University of PetroleumQingdao 266580China Sinopec Northeast Oil-Gas Branch Company Changchun 130062China

The Lower Cretaceous Yingcheng Formation in the southern Songliao Basin is the typical tight oil sandstone in *** order to better predict the petrophysical properties of the tight sandstone reservoirs in the Lower Cretaceous Yingcheng Formation,Songliao Basin,Northeast China,the diagenesis and porosity evolution was investigated using a suite of petrographic and geochemical techniques including thin section analysis,scanning electron microscopy,mercury intrusion and fluid inclusion analysis,on a set of selected tight sandstone *** with the histories of burial evolution,organic matter thermal evolution and hydrocarbon charge,the matching relationship between reservoir porosity evolution and hydrocarbon accumulation history is *** result showed that the tight sandstone reservoirs characterized of being controlled by deposition,predominated by compaction,improved by dissolution and enhanced by *** hydrocarbon accumulation period was investigated using a suite of hydrocarbon generation and expulsion history,microfluorescence determination and temperature measurement *** to the homogenization temperature of the inclusions and the history of burial evolution,Yingcheng Formation has mainly two phases hydrocarbon *** first phase of oil and gas is charged before the reservoir is tightened,the oil and gas generated by Shahezi source rocks enter the sand body of Yingcheng Formation,influenced by the carrying capability of sand conducting layer,oil and gas is mainly conducted by the better properties and higher connectivity sand body and enriched in the east,which belongs to the type of densification after hydrocarbon *** second phase of oil and gas charge after densification,which belongs to the type of densification before the hydrocarbon accumulation.

关键词： Diagenetic evolution Fluid inclusion Porosity recovery Reservoir quality Hydrocarbon charging periods dongling area Oil-gas exploration engineering Songliao Basin Heilongjiang Province China

Radio-frequency design and commissioning of a flexible waveguide for high-vacuum S-band applications

在线全文

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2020年第2期4卷 250-254页

作者： Xiang He Jian-She Cao Bing-Lin Deng jing-dong liu Nan Gan Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Purpose Flexible waveguides,which allow for greater deformation as compared to traditional hard waveguides,are highly useful for simplifying waveguide system ***,the peak powers of these waveguides have been limited to several megawatts in non-vacuum ***,a novel flexible waveguide was developed for the S-band(2856 MHz)with the aim of facilitating the interconnection of two hard *** The flexible waveguide was composed of brass,and its surface was plated with oxygen-free high-conductivity copper for brazing with stainless steel flanges in a vacuum *** connecting the stainless steel flanges together,it can be applied to a high-vacuum *** The prototype exhibited good measurement results in low-power microwave tests;the results of a 72-h vacuum leak test showed satisfactory vacuum performance as well,and no obvious surface collapse was ***-power microwave commissioning was conducted between June and July 2019;the waveguide showed a maximum average power of approximately 2.7 *** Unfortunately,the prototype was damaged after reaching that power level,which indicates the need for further optimization of the fabrication *** our experiment,it is clear that the flexible waveguide cannot be used in large accelerators because of its average power limit.

关键词： S-band Flexible waveguide High vacuum Microwave commissioning

RF design and test of a high-directivity high-power waveguide directional coupler for the HEPS

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

Radiation Detection Technology and Methods 2022年第2期6卷 137-142页

作者： Xiang He jing-Ru Zhang jing-dong liu Hua Shi Bing-Lin Deng Xu-Jian Wang Sheng-Chang Wang Nan Gan Pi-Long Tian Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Purpose A novel high-directivity high-power waveguide directional coupler(DC)working at 2998.8 MHz is developed for the High Energy Photon *** can help the phase control system to obtain a very accurate microwave signal,which is very important to minimize the beam *** The novel reversely placed T-type coupling piece helps to obtain a high *** N-type high-vacuum feedthroughs for vacuum sealing instead of the traditional ceramic plate is beneficial to holding a higher peak *** simulation and the high-power commissioning are accomplished in the Institute of High Energy Physics(IHEP),while the fabrication and the low-power test are conducted in cooperation with the *** Both the single-coupler and the dual-coupler DCs are developed with a directivity of more than 35 dB while keeping the coupling factor within 60±0.5 ***,69.4%of all the fifty-two mass produced DCs have got a directivity of more than 40 ***:The mature manufacturing process for mass production is *** novel high-directivity high-power waveguide DC can be mass produced with an actually internationally leading performance.

关键词： HEPS Directional coupler High directivity High power Mass production

Chinese-translated Behavioral Regulation in Exercise Questionnaire-2： Evidence from university students in the Mainland and Hong Kong of China

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

Journal of Sport and Health Science 2015年第3期4卷 228-234页

作者： jing dong liu Pak-Kwong Chung Chun-Qing Zhang Gangyan Si Department of Physical Education Hong Kong Baptist University Hong Kong 999077 China Department of Health and Physical Education Hong Kong Institute of Education Hong Kong 999077 China

Purpose： The purpose of the study was to examine the psychometric properties of the Chinese-translated Behavioral Regulation in Exercise Questionnaire-2 （C-BREQ-2） among Chinese university students from the Mainland and Hong Kong of China. Methods： University students from the Mainland （n = 191） and Hong Kong （n=194） of China participated in this study. Factorial validity, discriminant validity, nomological validity, internal reliability, and measurement invariance across sample of the C-BREQ-2 were examined. Results： Confirmatory factor analysis provided support for the factorial validity of the 18-item, 5-factor structure C-BREQ-2. Examination of the 95% confidence interval of the inter-factor correlations suggested that the C-BREQ-2 assesses related but distinct constructs, which provided support for its discriminant validity. The internal consistency reliability of the C-BREQ-2 was found acceptable. Examination of the pattern of inter-factor correlations between different regulations suggested that a simplex-like pattern was displayed, which provided evidence for the nomological validity of C-BREQ-2. The results from multi-group confirmatory factor analysis suggested that the factor loadings and variances/ covariances of the C-BREQ-2 measurement model were invariant across the Chinese university students in the Mainland and Hong Kong of China. Conclusion： The current study provided further psychometric evidence for the C-BREQ-2, which makes the further application and research of self-determination theory （SDT） based motivation in relation to exercise and physical activity in the Mainland of China context possible.

关键词： Behavioral regulation Chinese Motivation Reliability Validity