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A novel method of quantitative evaluation and comprehensive classification of low permeability-tight oil reservoirs: A case study of Jidong Oilfield, China

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Petroleum Science 2022年第4期19卷 1527-1541页

作者： Dong-Liang Jiang Hao Chen Jian-Peng Xing lin shang Qun-hui Wang Yan-Chun Sun Yao Zhao Jian Cui Ian Duncan State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China Key Lab of Petroleum Eng.of MOE China University of Petroleum(Beijing)Beijing102249China Postdoctoral Station of PetroChina Jidong Oilfield Company TangshanHebei 063000China Postdoctoral Program of PetroChina Research Institute of Petroleum Exploration and Development Beijing100083China Exploration and Development Research Institute PetroChina Jidong Oilfield CompanyTangshanHebei063000China Bureau of Economic Geology The University of Texas at Austin78705United States

The classification of low permeability-tight reservoirs is the premise of development. The deep reservoir of Shahejie 3 member contains rich low permeability-tight reserves, but the strong heterogeneity and complex micro pore structure make the main controlling factors subjective and the classification boundaries unclear. Therefore, a new indicator considering the interaction between fluid and rock named Threshold Flow Zone Indicator(TFZI) is proposed, it can be used as the main sequence of correlation analysis to screen the main controlling factors, and the clustering algorithm is optimized combined with probability distribution to determine the classification boundaries. The sorting coefficient, main throat radius, movable fluid saturation and displacement pressure are screened as the representative parameters for the following four key aspects: rock composition, microstructure, flow capacity and the interaction between rock and fluid. Compared with the traditional probability distribution and clustering algorithm, the boundary of the optimized clustering algorithm proposed in this paper is more *** classification results are consistent with sedimentary facies, oil levels and oil production *** method provides an important basis for the development of low permeability-tight reservoirs.

关键词： Low permeability-tight reservoir Classification boundary Correlation analysis Probability distribution Clustering algorithm

A NEW FILLED FUNCTION METHOD FOR INTEGER PROGRAMMING

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Journal of Computational Mathematics 2006年第1期24卷 25-32页

作者： Ming-ming Li You-lin shang Lian-sheng Zhang Department of Mathematics Shanghai University Shanghai 200444 China Department of Mathematics Shanghai University of Engineering Science Shanghai 200336 China Department of Mathematics Henan University of Science and Technology Luoyang 471003 China

The Filled Function Method is a class of effective algorithms for continuous global optimization. In this paper, a new filled function method is introduced and used to solve integer programming. Firstly, some basic definitions of discrete optimization are given. Then an algorithm and the implementation of this algorithm on several test problems are showed. The computational results show the algorithm is effective.

关键词： Global minimization Integer programming Filled function method

Conditional Edge Connectivity of the Locally Twisted Cubes

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Journal of the Operations Research Society of China 2019年第3期7卷 501-509页

作者： hui shang Eminjan Sabir Ji-Xiang Meng College of Mathematics and System Sciences Xinjiang UniversityUrumqi 830046China

The k-component edgeconnectivity cλk(G)of anon-completegraph G is themini mum number of edges whose deletion results in a graph with at least k components In this paper,we extend some results by Guo et al.(Appl Math Comput 334:401-406,2018)by determining the component edge connectivity of the locally twisted cubes LTQn,i.e.,cλk+1(LTQn)=kn-exk/2for 1≤2[n/2],n≥7,where exk=∑si=0ti2ti+∑si=02·i·2ti,and k is a positive integer with decomposition k=∑si=02ti such that to="log2k"and ti="log2(k-∑i-1 r=02tr)"for i≥*** a by-product,we characterize the corresponding optimal solutions.

关键词： Fault tolerance Locally twisted cubes Component edge connectivity

Quenched-in liquid in glass

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Materials Futures 2023年第1期2卷 168-172页

作者： Qing Wang Ying-hui shang Yong Yang Laboratory for Microstructures Institute of MaterialsShanghai UniversityShanghai 200072People’s Republic of China Department of Mechanical Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople’s Republic of China Department of Materials Science and Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople’s Republic of China Department of Advanced Design and System Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople’s Republic of China

Glasses have long been considered as frozen liquids because of the similarity between their static amorphous *** the modern theories about glass transition suggest that glass transition may result from supercooling of a heterogeneous liquid that contains fast and slow regions,it remains unclear whether such a physical picture applies to metallic glasses,which are a densely packed solid glass that was once believed to be a vitrified homogeneous metallic ***,in the recent work published in Nature Materials,Chang et al provide compelling evidence to show that metallic glasses contain liquid-like atoms that behave as a high-temperature liquid in stress *** activated under cyclic loading,this quenched-in liquid results in a fast relaxation process,which is discovered in a variety of metallic *** results are important and deliver a strong message that metallic glasses have a dynamic microstructure containing liquid-and solid-like *** importantly,the outcome of their research provides physical insight into the nature of glass-transition in metallic glasses,and also helps unravel their structure-property relations.

关键词： glass transition metallic glasses structural heterogeneity structure-property relation

Tetravalent Edge-transitive Cayley Graphs of PGL(2, p)

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Acta Mathematicae Applicatae Sinica 2013年第4期29卷 837-842页

作者： Xiao-hui HUA shang-jin XU Yun-ping DENG College of Mathematics and Information Science Henan Normal University School of Mathematics and Information Science Guangxi University Department of Mathematics Shanghai Jiaotong University

t Let F = Cay（G, S）, R（G） be the right regular representation of G. The graph Г is called normal with respect to G, if R（G） is normal in the full automorphism group Aut（F） of F. Г is called a bi-normal with respect to G if R（G） is not normal in Aut（Г）, but R（G） contains a subgroup of index 2 which is normal in Aut（F）. In this paper, we prove that connected tetravalent edge-transitive Cayley graphs on PGL（2,p） are either normal or bi-normal when p ≠ 11 is a prime.

关键词： Cayley graph normal bi-normal simple group

The Extraction,Isolation and Identification of Exudates from the Roots of Flaveria bidentis

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Journal of Integrative Agriculture 2014年第1期13卷 105-114页

作者： YANG Xing ZHANG Li-hui SHI Cui-ping shang Yan ZHANG Jin-lin HAN Jian-min DONG Jin-gao Molecular Plant Pathology Laboratory College of Life ScienceAgricultural University of Hebei

Large amounts ofFlaveria bidentis＇s root culturing solution were obtained by using DFT （deep flow technique） equipment and these solution which was vacuum concentrated （10, 20 mg mL-~） can have a certain inhibition on Triticum aestivum, Cucumis sativus, Raphanus sativus, Amaranthus retroflexus, Setaria viridis, Chenopodium album, Echinochloa crusgalli and Chloris virgata. This outcome suggested some active compounds in the root exudates ofFIaveria bidentis can inhibit the germination, seedling elongation and root length. The dichloromethane extract of root exudates was identificated by GC-MS, and 29 kinds of compounds, including esters, hydrocarbons, ketones, thiazole, amines, etc. were obtained and the phthalate n-octyl ester, phthalate 2-ethylhexyl ester were proved to be allelochemicals. The culturing solution of root exudates was separated through the resin column and silica gel column and a component inhibiting seedling height, root length and fresh weight of wheat was got. There were 6 kinds of organic compounds in this component including dioctyl phthalate, 1,2-phthalate, mono（2-ethylhexyl） ester by GC-MS.

关键词： extraction isolation identification exudates Flaveria bidentis

A Posterior Error Analysis for the Nonconforming Discretization of Stokes Eigenvalue Problem

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Acta Mathematica Sinica,English Series 2014年第6期30卷 949-967页

作者： shang hui JIA Fu Sheng LUO He Hu XIE School of Statistic and Mathematics Central University of Finance and Economics The Third Institute of Oceanography SOA LSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences

In this paper, we present a posteriori error estimator for the nonconforming finite element approximation, including using Crouzeix–Raviart element and extended Crouzeix–Raviart element, of the Stokes eigenvalue problem. With the technique of Helmholtz decomposition, we first give out a posteriori error estimator and prove it as the global upper bound and local lower bound of the approximation error. Then, by deleting a jump term in the indicator, another simpler but equivalent indicator is obtained. Some numerical experiments are provided to verify our analysis.

关键词： A posteriori error estimate adaptive finite element method nonconforming Stokes eigen-value problem

Electronic Data Preservation and Storage of Evidence by Blockchain

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Journal of Forensic Science and Medicine 2020年第1期6卷 27-36页

作者： Hua shang hui Qiang School of Humanities and Law North China University of TechnologyBeijingChina Institute for Chinese Legal Modernization Studies School of LawNanjing Normal UniversityNanjingJiangsuChina

In the face of the era of big data,how to ensure the authenticity of electronic data has become an important practical *** preservation methods based on hash operation,time stamp,and blockchain technology can effectively guarantee the authenticity and security of electronic *** are inherently traceable,de‑centralized,and difficult to tamper with,which can be enough served as the basic technology of electronic data *** by blockchain mainly includes the following links:platform registration and identity authentication,generation and transmission of electronic data,and storage of electronic *** by blockchain has higher security than centralized online security because of distributed ***,it should be acknowledged that the preservation by blockchain is not without *** court should adhere to the principle of individual review of each case and review the electronic data from its generation,transmission,reception,storage,and collection.

关键词： Electronic data online evidence preservation preservation by blockchain

Effect of Methane Emission Increases in East Asia on Atmospheric Circulation and Ozone

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Advances in Atmospheric Sciences 2015年第12期32卷 1617-1627页

作者： shang lin LIU Yi TIAN Wenshou ZHANG Yuli Shandong Province Climate Centre Key Laboratory of the Middle Atmosphere and Global Environmental Observation Institute of Atmospheric PhysicsChinese Academy of Sciences Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric SciencesLanzhou University

We used a fully coupled chemistry-climate model （version 3 of the Whole Atmosphere Community Climate Model, WACCM3） to investigate the effect of methane （CH4） emission increases, especially in East Asia and North America, on atmospheric temperature, circulation and ozone （03）. We show that CH4 emission increases strengthen westerly winds in the Northern Hemisphere midlatitudes, accelerate the Brewer-Dobson （BD） circulation, and cause an increase in the mass flux across the tropopause. However, the BD circulation in the tropics between 10°S and 10°N at 100 hPa weakens as CH4 emissions increase in East Asia and strengthens when CH4 emissions increase in North America. When CH4 emissions are increased by 50% in East Asia and 15% globally, the stratospheric temperature cools by up to 0.15 K, and the stratospheric 03 increases by 45 ppbv and 60 ppbv , respectively. A 50% increase of CH4 emissions in North America （with an amplitude of stratospheric 03 increases by 60 ppbv） has a greater influence on the stratospheric 03 than the same CH4 emissions increase in East Asia. CH4 emission increases in East Asia and North America reduce the concentration of tropospheric hydroxyl radicals （4% and 2%, respectively） and increase the concentration of mid-tropospheric 03 （5% and 4%, respectively） in the Northern Hemisphere midlatitudes. When CH4 emissions increase in East Asia, the increase in the tropospheric 03 concentration is largest in August. When CH4 emissions increase in North America, the increase in the 03 concentration is largest in July in the mid-troposphere, and in April in the upper troposphere.

关键词： CH4 temperature Brewer-Dobson circulation O3