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Sequential extraction and compositional analysis of oil-bearing fluid inclusions in reservoir rocks from Kuche Depression, Tarim Basin

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Chinese Science Bulletin 2000年第S1期45卷 60-66页

作者： PAN Changchun FU Jiamo sheng Guoying Stale Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

The free oils, adsorbed oils and oil-bearing fluid inclusions have been extracted separately and analyzed by GC and GC-MS in reservoir rock samples collected from the Kuche Depression. The results demonstrate that the molecular compositions of oil-bearing fluid inclusions are significantly different from those of the free oils (the current oils). Compared with the current oil, the oil-bearing fluid inclusions are characterized by relatively high values of parameters Pr/nC17 and Ph/nC18, low values of Pr/Ph, hopanes/steranes, C30-diahopane/C30-hopane and Ts/Tm, low content of C29Ts terpane and high maturities as indicated by C29 steranes 20S/(20R+20S). In addition, the oil-bearing fluid inclusions correlate very well with the oils in northern and central Tarim Basin, which were derived from Cambrian-Ordovician marine source rocks. The adsorbed oils appear to be an intermediate type between free oils and oil-bearing fluid inclusions. The above analytical data indicate that there are at least two

关键词： oil-bearing fluid inclusions adsorbed oils sequential extraction Kuche depression Tarim Basin.

Dynamics and screening characteristics of a vibrating screen with variable elliptical trace

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Mining Science and Technology 2009年第4期19卷 508-513页

作者： HE Xiao-mei LIU Chu-sheng School of Mechanical and Electrical Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221116 China

The ideal motion characteristics for the vibrating screen was presented according to the principle of screening process with constant bed thickness.A new vibrating screen with variable elliptical trace was *** accurate mechanical model was constructed according to the required structural motion *** multi-degree-of-freedom vibration theory,characteristics of the vibrating screen was *** parameters of the vibrating screen which motion traces were linear,circular or elliptical were *** stable solutions of the dynamic equations gave the motions of the vibrating screen by means of computer *** parameters,including amplitude,movement velocity and throwing index,of five specific points along the screen surface were gained by theoretical *** results show that the traces of the new designed vibrating screen follow the ideal screening *** screening efficiency and processing capacity may thus be effectively improved.

关键词： variable elliptical trace screening process with constant bed thickness dynamic model motion characteristic screening characteristics

Management of non-alcoholic fatty liver disease patients with sleep apnea syndrome

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World Journal of Gastroenterology 2022年第43期28卷 6099-6108页

作者： Wei sheng Guang Ji Li Zhang Institute of Digestive Diseases Longhua HospitalShanghai University of Traditional Chinese MedicineShanghai 200032China

Nonalcoholic fatty liver disease(NAFLD)is strongly associated with sleep apnea syndrome(SAS).Many NAFLD patients have SAS,and obstructive sleep apnea hypopnea syndrome is also considered to be an independent risk factor for NAFLD,as it contributes to the progression of NAFLD via oxidative stress,lipid peroxidation,inflammation,and insulin *** review aims to provide some recommendations for the management of NAFLD patients with SAS,including diet,exercise,weight loss,and continuous positive airway *** review also highlights the importance of effective strategies in NAFLD prevention and treatment.

关键词： Nonalcoholic fatty liver disease Sleep apnea syndrome Obesity Obstructive sleep apnea hypopnea syndrome Continuous positive airway pressure Management

Outcomes of cardiac surgery in senior aged patients with ventricular dysfunction:analysis of a large national database

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Journal of Geriatric Cardiology 2021年第1期18卷 1-9页

作者： Han-Wei TANG Kai CHEN Jian-Feng HOU Xiao-Hong HUANG sheng LIU Han-Ping MA sheng-Shou HU Department of Cardiovascular Surgery National Center for Cardiovascular DiseasesState Key Laboratory of Cardiovascular DiseaseFuwai HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Department of Special Medical Treatment Center Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Science and Peking Union Medical CollegeBeijingChina

OBJECTIVE In patients undergoing cardiac surgery,reduced preoperative ejection fraction(EF)and senior age are associated with a worse *** most outcome data available for these patients are mainly from Western surgical populations involving specific surgery types,our aim is to evaluate the real-world characteristics and perioperative outcomes of surgery in senior-aged heart failure patients with reduced EF across a broad range cardiac *** Data were obtained from the China Heart Failure Surgery Registry(China-HFSR)database,a nationwide multicenter registry study in China's *** variable regression analysis was performed in patients over 75 years old to identify risk factors associated with *** From 2012 to 2017,578 senior-aged(>75 years)patients were enrolled in China HFSR,21.1%of whom were *** coronary bypass grafting(CABG)were performed in 71.6%of patients,10.1%of patients underwent isolated valve surgery and 8.7%received CABG combined with valve ***-hospital mortality was 10.6%,and the major complication rate was 17.3%.Multivariate analysis identified diabetes mellitus(odds ratio(OR)=1.985),increased creatinine(OR=1.007),New York Heart Association(NYHA)Class III(OR=1.408),NYHA class IV(OR=1.955),cardiogenic shock(OR,6.271),and preoperative intra-aortic balloon pump insertion(OR=3.426)as independent predictors of in-hospital *** In senior-aged patients,preoperative evaluation should be carefully performed,and strict management of reversible factors needs more ***-aged patients commonly have a more severe disease status combined with more frequent comorbidities,which may lead to a high risk in mortality.

关键词： Western analysis of a large national database Outcomes of cardiac surgery in senior aged patients with ventricular dysfunction

Numerical Simulation of the Fractional-Order Lorenz Chaotic Systems with Caputo Fractional Derivative

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Computer Modeling in Engineering & Sciences 2023年第5期135卷 1371-1392页

作者： Dandan dai Xiaoyu Li Zhiyuan Li Wei Zhang Yulan Wang School of Physics and Electronic Information Engineering Jining Normal UniversityJining012000China Department of Mathematics Inner Mongolia University of TechnologyHohhot010051China Institute of Economics and Management Jining Normal UniversityJining012000China

Although some numerical methods of the fractional-order chaotic systems have been announced,high-precision numerical methods have always been the direction that researchers strive to *** on this problem,this paper introduces a high-precision numerical *** complex dynamic behavior of fractional-order Lorenz chaotic systems are shown by using the present *** observe some novel dynamic behavior in numerical experiments which are unlike any that have been previously discovered in numerical experiments or theoretical *** investigate the influence of α_(1),α_(2),α_(3) on the numerical solution of fractional-order Lorenz chaotic *** simulation results of integer order are in good agreement with those of *** simulation results of numerical experiments demonstrate the effectiveness of the present method.

关键词： Novel complex dynamic behavior numerical simulation fractional-order lorenz chaotic systems high-precision

Ichnofabrics and Their Environmental Interpretation from the Fluvial Deposits of the Middle Triassic Youfangzhuang Formation in Western Henan, Central China

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Journal of Earth Science 2014年第4期25卷 648-661页

作者： Min Wang Yongan Qi Da Li Mingyue dai Yuguang Chang Institute of Resources and Environment Henan Polytechnic University

Fluvial deposits from the Middle Triassic Youfangzhuang Formation in Henan Province, China contain a low-diversity trace fossils. Vertical dwelling burrows of opportunists dominate in active channel, whereas horizontal deposit-feeding, grazing, and vertical dwelling burrows occur in overbank deposits. Seven recurrent ichnofabrics were distingushed. The Palaeophycus tubularis ichnofabric pre- serves below scour interface between two fluvial cycles. The Skolithos linearis ichnofabric forms in middle to high-energy, soft substrates in the middle and upper parts of active channel deposits under semi-arid climate. The Skolithos linearis-Planolites montanus ichnofabric occurs in the sediments just a little above the Skolithos linearis ichnofabric and is formed in middle-energy, soft substrates in the up- per part of active channel deposits. The Planolites montanus ichnofabric is mostly preserved in associa- tion with medium- to thick-bedded brown-red silty mudstones or siltstones in low-energy, perennial muddy bottom ponds in overbank settings. The Taenidium barretti ichnofabric is interpreted as peri- odically exposed ephemeral ponds or low-energy distal floodplain. The Skolithos isp. ichnofabric com- monly occurs in middle to high-energy firm ground of proximal foodplain or crevasse-splay deposits. The root trace iehnofabric occurs in the crevasse splay deposits. The presence of thin palaeosols and the abundance of calcretization in mudstones indicate a seasonal climate ranging from humid to semi-arid, with high temperature, rainfall, and well-defined dry and wet seasons.

关键词： trace fossil ichnofabric fluvial deposit environmental interpretation Middle Triassic Youfangzhuang Formation.

A modular hierarchical array camera

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Light(Science & Applications) 2021年第4期10卷 542-550页

作者： Xiaoyun Yuan Mengqi Ji Jiamin Wu David JBrady Qionghai dai Lu Fang Departm ent of Electronic Engineering Tsinghua UniversityBeijing 100084China Department of Automation Tsinghua UniversityBeijing 100084China College of Optical Sciences University of ArizonaTucsonAZ 85721USA lnstitute of Brain and Cognitive Science Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology Beijing 100084China

Array cameras removed the optical limitations of a single camera and paved the way for high-performance imaging via the combination of micro-cameras and computation to fuse multiple aperture ***,existing solutions use dense arrays of cameras that require laborious calibration and lack flexibility and *** by the cognition function principle of the human brain,we develop an unstructured array camera system that adopts a hierarchical modular design with multiscale hybrid cameras composing different *** computations are designed to collaboratively operate along both intra-and intermodule *** system can adaptively allocate imagery resources to dramatically reduce the hardware cost and possesses unprecedented flexibility,robustness,and *** scenes of real-world data were acquired to perform human-centric studies for the assessment of human behaviours at the individual level and crowd behaviours at the population level requiring highresolution long-term monitoring of dynamic wide-area scenes.

关键词： camera system removed

Ways to sparse representation:An overview

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Science in China(Series F) 2009年第4期52卷 695-703页

作者： YANG JingYu PENG YiGang XU WenLi dai QiongHai Department of Automation Tsinghua University Beijing 100084 China

Many algorithms have been proposed to find sparse representations over redundant dictionaries or transforms. This paper gives an overview of these algorithms by classifying them into three categories： greedy pursuit algorithms, lp norm regularization based algorithms, and iterative shrinkage algorithms. We summarize their pros and cons as well as their connections. Based on recent evidence, we conclude that the algorithms of the three categories share the same root： lp norm regularized inverse problem. Finally, several topics that deserve further investigation are also discussed.

关键词： sparse representation redundant dictionary redundant transform nonlinear approximation matching pursuit basis pursuit iterativeshrinkage

Three New Silver Alkylenediphosphonates with Pillar-like Open-frameworks

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1231-1241页

作者： FU Rui-Biao HU sheng-Min ZHANG Hui-Shuang WANG Long-sheng LI Ya-Min HUANG Xi-He WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Science Fuzhou Fujian 350002 China

Three new silver alkylenediphosphonates, [Ag2（HO3PCH2CH2CH2CH2PO3H）] 1, [Ag4（O3PCH2CH2CH2CH2PO3）] 2 and [Ag4（O3PCH2CH2CH2PO3（H2O）] 3, have been hydrotherreally synthesized and characterized by X-ray single-crystal and powder diffraction, elemental analyses, IR and thermogravimetric analyses （TGA）. The structures of these compounds are all threedimensional pillar-like open-frameworks with 18-membered [Ag2O4P4C8] channels for compound 1 and 2, and 16-member [Ag2O4P4C6] channels for compound 3. Both 2 and 3 contain interesting twodimensional Ag（Ⅰ） networks based on Ag...Ag interactions. 1,4-Butylene- and 1,3-propylene diphosphonate groups of 2 and 3 bond the first and second maximum metal atoms among metal organodiphosphonates with linking sixteen and fifteen silver（Ⅰ） atoms, respectively. In addition, the coordinated water molecules of 3 can be reversibly removed and recovered.

关键词： hydrothermal syntheses silver diphosphonate pillar-like single crystal