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Petroleum Science 2019年第4期16卷 752-762页

作者： De-Bo Ma Guang-Hui Wu Nicola Scarselli Xin-Sheng Luo jian-fa Han Zhi-Yong chen School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500SichuanChina PetroChina Research Institute of Petroleum Exploration and Development Beijing 100083China fault Dynamics Research Group Department of Earth SciencesRoyal Holloway University of LondonEgham TW20 0EXUK PetroChina Tarim Oilfield Company Korla 841000XinjiangChina

Understanding the scaling relation of damage zone width with displacement of faults is important for predicting subsurface faulting mechanisms and fluid flow processes. The understanding of this scaling relationship is influenced by the accuracy of the methods and types of data utilized to investigate faults. In this study, seismic reflection data are used to investigate the throw and damage zone width of five strike-slip faults a ecting Ordovician carbonates of the Tarim intracraton basin,NW China. The results indicate that fault slips with a throw less than 200 m had formed wide damage zones up to 3000 m in width. Also, damage zone width is found to have both a positive correlation and a power-law relation with throw of two orders of magnitude, with a ratio of these values varying in a range of 2–15. The relationship between throw and damage zone width is not a simple power-law and changes its slope from small to larger size faults. The results indicate that throw scales well with damage zone width for the studied faults, and hence these can be used to predict fault geometries in the Tarim Basin. The study of the wide carbonate damage zones presented here provides new insights into scaling of large-size faults, which involve multiple faulting stages.

关键词： fault damage zone Carbonate Throw Scaling Evolution Tarim Basin

Some New Transition Classes in the Fractional Quantum Hall Effect and Their Critical Filling factors

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Chinese Physics Letters 1996年第3期13卷 215-218页

作者： chen Ying-jian Institute of Scientific and Technical Information of China Beijing 100038

The transitions between fractional quantum Hall states are classified into three equivalence classes by virtue of the matrix *** is pointed out that there probably exist two new transition classes and the critical fil... 详细信息

关键词： theory. transitions Transition

Productivity effect and overuse of pesticide in crop production in China

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Journal of Integrative Agriculture 2015年第9期14卷 1903-1910页

作者： ZHANG Chao Guanming Shi SHEN jian HU Rui-fa School of Management and Economics Beijing Institute of Technology Department of Agricultural and Applied Economics University of Wisconsin

Chinese farmers are often accused of overusing pesticides that play a crucial role in enhancing crop yield by reducing losses to crop pests. Pesticide overuse has caused a series of negative health and environmental externalities. This paper quantiifes the productivity effect and the optimal amount of pesticides in rice, cotton and maize production in China from the economic perspective. Using survey data col ected in 2012 and 2013, both Cobb-Douglas and Weibul damage control speciifcations are used to estimate the production function. Results show that pesticides have statistical y signiifcant pro-ductivity effect on crop yield. On the condition of Weibul damage control speciifcations, the marginal products of 1 kg of the active ingredients of pesticides for rice, cotton and maize are 71.06, 22.73 and 98.45 kg, respectively. However, 57, 64 and 17%of the actual amount of pesticides are overused for rice, cotton and maize, respectively. Moreover, the productivity effect of pesticides would be overestimated using Cobb-Douglas speciifcation without incorporating a damage control agent.

关键词： productivity effect damage control agent pesticide overuse marginal product

Agricultural GMO safety administration in China

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Journal of Integrative Agriculture 2015年第11期14卷 2157-2165页

作者： KOU jian-ping TANG Qiao-ling ZHANG Xian-fa Biosafety Office of Agricultural GMOs Ministry of Agriculture of China (MOA) Biotechnology Research Institute Chinese Academy of Agricultural Sciences

Given the public concern over the safety of genetically modified （GM） technology and products, the article elaborated the safety regulatory and administration on agricultural GMOs in China. China has made a set of laws and regulations of GMO safety management and confirmed competent authorities with clear-cut responsibilities. According to the laws and regulations, GMO products before entering markets have to pass through safety evaluation, get production and processing permission and be labeled correctly. For the importation of GM products, China has set up an import approval system. In addition, China has established technical supportive systems, including safety evaluation specifications, trial specifications and criteria specifications. The existing regulatory system supervises and regulates all activities and work related to agri- cultural GMOs in China.

关键词： GMOs bio-technology safety evaluation labeling information disclosure

Real-time observation of bainite formation at heterogeneous phases in a high-strength weathering steel

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Journal of Iron and Steel Research International 2019年第3期26卷 301-309页

作者： jian cheng Jia-sheng Qing Yue-hua Guo Hou-fa Shen Key Laboratory for Advanced Materials Processing Technology Ministry of EducationSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Pangang Group Research Institute Co. Ltd.State Key Laboratory of Vanadium and Titanium Comprehensive UtilizationPanzhihua 617000SichuanChina

Due to the excellent comprehensive mechanical properties and toughness of bainite steels,bainite is regarded as a most desirable microstructure for the new generation of high-strength weathering *** formation of bainite was observed in real time in a high-strength weathering steel,and the results showed that bainite laths show impingement during phase *** preferred regions of nucleation sites were identified,and the growth rate of bainite was *** growth mechanism of bainite was demonstrated to exhibit growth rate contributions from both the diffusion mechanism and the shear ***,the heterogeneous phases that form preferred sites for bainite nucleation were quantitatively identified by scanning electron microscopy(SEM),energy-dispersive X-ray spectrometry(EDS),and calculation of phase diagram(CALPHAD).The austenite grain sizes in crease with increasing austenite temperature,which leads to longer bainite *** influence of a small lattice disregistry between the heterogeneous phases and bainite on the bainite nucleation was *** disregistries between the favorable heterogeneous phases of VN,VC,TiN,or TiC and the ot-Fe in bainite are 2.9,3.1,3.9,and 4.6%,***,VN,VC,TiN,and TiC can act as highly effective nuclei for bainite during the bainite transformation.

关键词： Bainite Real-time observation Plasticity Phase transformation Weathering steel

Multiple primary malignancies-hepatocellular carcinoma combined with splenic lymphoma:A case report

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World Journal of Clinical Cases 2022年第28期10卷 10130-10135页

作者： fa-Zong Wu Xiao-Xiao chen Wei-Yue chen Qiao-Hong Wu jian-Ting Mao Zhong-Wei Zhao Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention Research The Fifth Affiliated Hospital of Wenzhou Medical UniversityLishui Hospital of Zhejiang UniversityLishui 323000Zhejiang ProvinceChina

BACKGROUND Primary liver cancer is one of the most common malignant tumours,while primary splenic lymphoma is a rare ***,cases of hepatocellular carcinoma(HCC)combined with splenic lymphoma are extremely *** SUMMARY We present a 62-year-old woman who was admitted to the Interventional Radiology Department with a lump in the spleen and liver as well as multiple enlarged lymph nodes visible by ***-enhanced computed of the abdomen revealed a circular,low-density,shallow mass(approximately 2.6 cm in diameter)in the left intrahepatic lobe and multiple round,low-density shadows in the spleen with clear boundaries(maximum diameter 7.6 cm).Based on the characteristic clinical symptoms and explicit radiological findings,the clinical diagnosis was HCC with metastasis to the liver portal,retroperitoneal lymph nodes,and *** transcatheter arterial chemoembolization and sequential radiofrequency ablation,the-fetoprotein level returned to the normal range,and the hepatitis B cirrhosis *** addition,splenic tumour biopsy confirmed the diagnosis of primary malignant lymphoma,which went into remission after *** HCC with primary splenic non-Hodgkin lymphoma is extremely rare and easily *** understanding would facilitate early diagnosis,treatment and prognosis.

关键词： Multiple primary malignancies Hepatocellular carcinoma Splenomegaly Extra-hepatic primary malignancy Magnetic resonance imaging Primary non-Hodgkin’slymphoma Case report

Polychlorinated dibenzo-p-dioxins and dibenzofurans in flue gas emissions from municipal solid waste incinerators in China

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第9期9卷 1296-1303页

作者： Tong chen Yue-ling GU jian-hua YAN Xiao-dong LI Sheng-yong LU Hui-fen DAI Ke-fa CEN State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China School of Medicine Zhejiang University Hangzhou 310058 China

Polychlorinated dibenzo-p-dioxins and furans （PCDD/Fs） emissions in flue gas from two types of municipal solid waste incinerators （MSWIs） most commonly used in China were investigated in this study. The selected incinerators include two grate-type MSWIs： MSWI-A （350 t/d） and MSWI-B 050 t/d）, and two fluidized bed MSWIs： MSWI-C （400 t/d） and MSWI-D （400 t/d）, which are all equipped with semi-dry lime scrubber and bag filter except MSWI-D equipped with cyclone and wet scrubber （WS） as air pollutant control device （APCD）. Results indicated that the emission concentration and the international toxic equivalents （I-TEQs） of the PCDD/Fs from the stacks were in the range of 1.210-10.273 ng/Nm^3 and 0.019-0.201 ng I-TEQ/Nm^3, respectively. They were greatly lower than the emission regulation standard of PCDD/Fs in China （1.0 ng I-TEQ/Nm^3）. However, only the PCDD/Fs emission level from MSWI-C was below 0.1 ng I-TEQ/Nm^3. Although the homologue profiles were distinct, the contributions of the 2,3,7,8-subsituted congeners to the total I-TEQ were similar among all the investigated MSWIs. Two major 2,3,7,8-substituted congeners, 2,3,4,7,8-PeCDF and 1,2,3,7,8-PeCDD, account for 47% and 9% （average values） of the total I-TEQ values, respectively. The correlation between PCDD/Fs levels and composition of flue gas was also discussed.

关键词： Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) Municipal solid waste incinerator (MSWI) Grate Fluidized bed

A MULTI-PERIOD PRICING AND INVENTORY CONTROL MODEL

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Journal of Systems Science & Complexity 2010年第2期23卷 249-260页

作者： Juliang ZHANG jian chen Department of Logistics Management School of Economics and Management Beijing Jiaotong UniversityBeijing 100044 China. Department of Management Science and Engineering School of Economics and Management Tsinghua University Beijing 100084 China.

The authors analyze a finite horizon,single product,period review model in which pricingand inventory decisions are made *** in different periods are random variablesthat are independent of each other and their distributions depend on the product *** andordering decisions are made at the beginning of each period and all shortage are *** is a convex function of the amount *** objective is to find an inventory and pricing policymaximizing expected discounted profit over the finite *** authors characterize the structure ofthe optimal combined pricing and inventory strategy for this ***,the authors demonstratehow the profit-to-go function,order up to level,reorder point and optimal price change with respectto state and time.

关键词： Convex cost function planning horizon pricing stochastic inventory management uncertainty.

STUDY ON REVENUE SHARING CONTRACT IN VIRTUAL ENTERPRISES

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Journal of Systems Science and Systems Engineering 2006年第1期15卷 95-113页

作者： jian chen jianfeng chen School of Economics and Management Tsinghua University Beijing 100084 China School of Economics and Management Tsinghua University Beijing 100084 China

Member enterprises engaged in a virtual enterprise are prone to shirk both productive efforts and risks because their efforts are unobservable to any other member enterprises. How to design a revenue sharing contract to prevent the member enterprises from free riding is one of the most important issues to be considered to cut down risks that virtual enterprises may meet. Based on the work of profit sharing in partnerships and the research on revenue sharing in supply chains and joint ventures, we propose a model of the revenue sharing contract aimed at coordinating a virtual enterprise composed of n risk-averse member enterprises where every member enterprise performs different tasks and contributes distinct core resources. We characterize the optimal productive efforts, risk-taken and incentive intensity in the revenue sharing contract, and indicate that improving the evaluation precision of productive efforts and selecting weakly risk-averse member enterprises with close power are the key factors to the success of VEs.

关键词： Virtual enterprise revenue sharing productive effort risk aversion incentive intensity

On Nonlinearity of S-Boxes and Their Related Binary Codes

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Chinese Journal of Electronics 2016年第1期25卷 167-173页

作者： LIU jian chen Lusheng School of Mathematical Sciences Nankai University

The nonlinearity of S-boxes and their related supercodes of the first order Reed-Muller code are discussed. Based on the properties of multi-output bent functions and almost bent functions, we determine the maximum size of linear supercodes of the first order ReedMuller code which have optimal or suboptimal minimum distance, and we also give the weight distributions of these supercodes which achieve the best possible size. Furthermore, an upper bound on the minimum distance of a class of binary linear codes is presented, which yields a new upper bound on the nonlinearity of S-boxes. The new bound on nonlinearity improves a bound given by Carlet et al. in 2007.

关键词： S-boxes Nonlinearity Bent functions Almost bent functions Reed-Muller codes