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The Direction of Marketing in E-commerce

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厦门大学学报（自然科学版） 2002年第S1期41卷 263-264页

作者： ZHANG Wu-yi 1, WEN Shu-hui 2. PENG Lan-ping 3 (1. School of management, Huazhong university of {2. and technology, Wuhan 430074, china 2. department of management, kunming university of science and technology, kun ming 650093. china 3. Human Resource Bureau of Yunnan Province)

E-commerce is the execution of business transactio ns over the Internet. Companies conducting e-commerce can perform most of the tra nsactions which they are doing now. Most of the marketing method should coincide nt with the changes in e-commerce world. Brand ability will be depressed, but corporate identity and brand identity will be upgraded. So the enterprise should lower the cost of distribution, manufactur ing, and supplying. We can also upgrade the product value which consumer con ceded. Logistic will be core ability. The 3pl and 4pl will be used more and more often. The importance of transportation has grown with the increasing globalization as well as the growth in e-commerce. Firms should identify various transportation network design options and their relative strengths and weaknesses. They should also use methodologies for routing and scheduling deliveries in transportation network. The savings matrix and the generalized assignment methodology can be us ed to minimize the transportation cost while meeting delivery commitments to cus tomers. Information is essential to making good decisions. Information technology provid es the tools to gather information and analyze it in order to make the best deci sions. Information plays a key in every company. Information technology will be used broadly. It is a factual component on which decisions about each of the transportation, facilities, and inventory. In essence, information is the glue that holds the company to other firms, and allows it to function, making informa tion the most important firms drivers. Custom relation {2., data based marketing, one to one marketing, electron ic odder system, electronic data exchange, will be used frequent. These new mark eting method is using information technology all. IT investment in program will greatly increase. The consumer can find and compare the price in every character easily on Interne t. Cost becomes the most important factor in product selecting. So the e

关键词： marketing e-commerce direction

A Constrained Local Neighborhood Approach for Efficient Markov Blanket Discovery in Undirected Independent Graphs

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Computers, Materials & Continua 2024年第8期80卷 2535-2555页

作者： kun Liu Peiran Li Yu Zhang JiaRen ming Li Xianyu Wang Cong Li School of Information and Communication Engineering Hainan UniversityHaikou570228China National Key Laboratory of science and technology on Space Microwave China Academy of Space Technology Xi’anXi’an710100China Strategic Emerging Industries department CRSC Communication&Information Group Co.Ltd.Beijing100070China Military Representative Bureau of the Army Equipment department in Xi’an Xi’an710032China

When learning the structure of a Bayesian network,the search space expands significantly as the network size and the number of nodes increase,leading to a noticeable decrease in algorithm *** constraint-based methods typically rely on the results of conditional independence ***,excessive reliance on these test results can lead to a series of problems,including increased computational complexity and inaccurate results,especially when dealing with large-scale networks where performance bottlenecks are particularly *** overcome these challenges,we propose a Markov blanket discovery algorithm based on constrained local neighborhoods for constructing undirected independence *** method uses the Markov blanket discovery algorithm to refine the constraints in the initial search space,sets an appropriate constraint radius,thereby reducing the initial computational cost of the algorithm and effectively narrowing the initial solution ***,the method first determines the local neighborhood space to limit the search range,thereby reducing the number of possible graph structures that need to be *** process not only improves the accuracy of the search space constraints but also significantly reduces the number of conditional independence *** performing conditional independence tests within the local neighborhood of each node,the method avoids comprehensive tests across the entire network,greatly reducing computational *** the same time,the setting of the constraint radius further improves computational efficiency while ensuring *** to other algorithms,this method can quickly and efficiently construct undirected independence graphs while maintaining high *** simulation results show that,this method has significant advantages in obtaining the structure of undirected independence graphs,not only maintaining an accuracy of over 96%but also reducing the number of conditi

关键词： Bayesian network structure learning Markov blanket conditional independence

Uniform estimate for maximum of randomly weighted sums with applications to insurance risk theory

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science china Mathematics 2005年第10期48卷 1379-1394页

作者： WANG Dingcheng~1 SU Chun~2.& ZENG Yong~1 1. School of management and School of Applied Mathematics,university of Electronic {2. and technology of china,Chengdu 610054,china 2. department of Statistics and Finance,university of {2. and technology of china,Hefei 2.002.,china School of management and School of Applied Mathematics University of Electronic Science and Technology of China Chengdu China department of Statistics and Finance University of Science and Technology of China Hefei China

This paper obtains the uniform estimate for maximum of sums of independent and heavy-tailed random variables with nonnegative random weights, which can be arbitrarily dependent of each other. Then the applications to ... 详细信息

关键词： dependent stochastic return, discount factor, heavy-tails, discrete time insurance risk model, maxima of randomly weighted sums, ruin probability, tail probabilities, uniformly asymptotic estimate.

The characteristics of cerebrospinal fluid tumor microenvironment in a patient with leptomeningeal metastases from cancer of unknown primary

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Genes & Diseases 2024年第3期11卷 39-42页

作者： Haoyu Ruan Zhe Wang Xuemei Tang Qiong Zhan kun Chen Lu Gao ming Guan department of Laboratory Medicine Huashan HospitalFudan UniversityShanghai 200040China department of Laboratory Medicine The First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China department of Physiology Naval Medical UniversityShanghai 200433China department of Oncology Huashan HospitalFudan UniversityShanghai 200040China

Cancer of unknown primary(CUP)is a rare disease characterized by metastases in which the primary tumor is of unknown *** cerebrospinal fluid(CSF)tumor microenvironment of CUP is still unknown.A Chinese male was diagnosed with leptomeningeal metastases from CUP(CUP-LM)based on the following medical examination results:partial leptomeningeal enhancement by brain magnetic resonance imaging,few malignant cells of diverse morphology in CSF,and no abnormalities or lymphadenopathy by systemic examination.

关键词： metastases cerebrospinal fluid

Could the EU carbon border adjustment mechanism promote climate mitigation?An economy-wide analysis

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Advances in Climate Change Research 2024年第3期15卷 557-571页

作者： kun ZHANG Yun-Fei YAO Xiang-Yan QIAN Yu-Fei ZHANG Qiao-Mei LIANG Yi-ming WEI College of Economics and management Beijing University of TechnologyBeijing 100124China Center for Energy and Environmental Policy Research Beijing Institute of TechnologyBeijing 100081China School of management and Economics Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Energy Economics and Environmental management Beijing 100081China Sinopec Research Institute of Petroleum Engineering SinopecBeijing 100101China College of Economics and management Nanjing Agricultural UniversityNanjing 210095China

Due to concerns about carbon leakage and sectoral competitiveness,the European Union(EU)proposed implementing the carbon border adjustment mechanism(CBAM).The effectiveness and potential negative consequences of CBAM have aroused extensive *** the perspective of the economy-wide analysis,this study uses a global computable general equilibrium model to explore the rationality of CBAM from the aspects of socioeconomic impact and the effects of promoting climate ***,the potential alternative mechanism of CBAM is *** results show that CBAM can reduce the EU's gross domestic product(GDP)loss;however,the GDP loss in all other regions ***,CBAM raises household welfare losses in most regions,including the ***,although CBAM can reduce the marginal abatement cost in eight regions,it comes at the cost of greater economic ***,the economic and household welfare cost of raising emissions reduction targets in regions like the USA and Japan is substantially higher than the impact of passively accepting the CBAM;therefore,CBAM's ability to drive ambitious emission reduction initiatives may be ***,for the potential alternative mechanism,from the perspective of reducing economic cost and household welfare losses,the EU could implement domestic tax cuts in the short-term and promote global unified carbon pricing in the long-term.

关键词： Border adjustment mechanism Computable general equilibrium model Carbon price Climate policy Global carbon pricing

Advances in the study of gastric organoids as disease models

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 1725-1736页

作者： Yi-Yang Liu De-kun Wu Ji-Bing Chen You-ming Tang Feng Jiang Graduate School Guangxi University of Chinese MedicineNanning 530011Guangxi Zhuang Autonomous RegionChina Teaching Experiment and Training Center Guangxi University of Chinese MedicineNanning 530011Guangxi Zhuang Autonomous RegionChina Central Laboratory Ruikang Hospital Affiliated to Guangxi University of Traditional Chinese MedicineNanning 530011Guangxi Zhuang Autonomous RegionChina department of Digestive Disease Ruikang Hospital Affiliated to Guangxi University of Traditional Chinese MedicineNanning 530011Guangxi Zhuang Autonomous RegionChina AIDS Research Center Ruikang Hospital Affiliated to Guangxi University of Traditional Chinese MedicineNanning 530011Guangxi Zhuang Autonomous RegionChina

Gastric organoids are models created in the laboratory using stem cells and sophisticated three-dimensional cell culture *** models have shown great promise in providing valuable insights into gastric physiology and advanced disease *** review comprehensively summarizes and analyzes the research advances in culture methods and techniques for adult stem cells and induced pluripotent stem cell-derived organoids,and patient-derived *** potential value of gastric organoids in studying the pathogenesis of stomach-related diseases and facilitating drug screening is initially *** construction of gastric organoids involves several key steps,including cell extraction and culture,three-dimensional structure formation,and functional *** the structure and function of the human stomach by disease modeling with gastric organoids provides a platform to study the mechanism of gastric cancer induction by Helicobacter *** addition,in drug screening and development,gastric organoids can be used as a key tool to evaluate drug efficacy and toxicity in preclinical *** can also be used for precision medicine according to the specific conditions of patients with gastric cancer,to assess drug resistance,and to predict the possibility of adverse ***,despite the impressive progress in the field of gastric organoids,there are still many unknowns that need to be addressed,especially in the field of regenerative ***,the reproducibility and consistency of organoid cultures are major challenges that must be *** challenges have had a significant impact on the development of gastric ***,as technology continues to advance,we can foresee more comprehensive research in the construction of gastric *** research will provide better solutions for the treatment of stomach-related diseases and personalized medicine.

关键词： Organoids Stomach neoplasms Helicobacter pylori Drug evaluation Preclinical Precision

Manipulating guest-responsive spin transition to achieve switchable fluorescence in a Hofmann-type framework

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science china Chemistry 2024年第10期67卷 3339-3346页

作者： Xue-Ru Wu Shu-Qi Wu Zhi-kun Liu ming-Xing Chen Jun Tao Osamu Sato Hui-Zhong Kou Engineering Research Center of Advanced Rare Earth Materials(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084China Institute for Materials Chemistry and Engineering&IRCCS Kyushu University744 MotookaNishi-kuFukuoka 819-0395Japan Key Laboratory of Cluster science of Ministry of Education School of Chemistry and Chemical EngineeringLiangxiang CampusBeijing Institute of TechnologyBeijing 102488China Analytical Instrumentation Center College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

The change of fluorescence emission manipulated by spin state transition attracts considerable attention owing to its potential applications in magneto-optical switching ***,we report two two-dimensional(2.)Hofmann-type spin crossover(SCO)metal-organic frameworks(MOFs)[Fe^(Ⅱ)(PNI)_(2.{Ag^(Ⅰ)(CN)_(2.}_(2.]·CHCl_(3)(3Ag·CHCl_(3))and[FeⅡ(PNI)_(2.{AuⅠ(CN)_(2.}_(2.]·CHCl_(3)(3Au·CHCl_(3))based on the fluorescent ligand N-(4-pyridylmethyl)-1,8-naphthalimide(PNI).Both complexes exhibit interesting SCO behaviors switched by guest solvent molecules,namely three-step transitions for the solvated complexes and complete onestep hysteretic SCO for the desolvated ones,verified by temperature-dependent magnetic susceptibility measurements,Mossbauer spectra,structural analyses,and differential scanning calorimetry ***,temperature-dependent fluorescence spectra exhibit double peaks(monomer and excimer emission)with both emission peaks change consistent with the change in SCO properties during the solvent molecule *** this study,we integrated guest-responsive SCO behavior into MOFs to manipulate the multistability of spin state and fluorescence switching,providing a rational strategy for the development of stimuli-responsive multifunctional materials.

关键词： spin crossover fluorescence multifunctional materials metal-organic frameworks Hofmann-type

Reengineering Model of Supply Chain of Tea Industry in Yunnan

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厦门大学学报（自然科学版） 2002年第S1期41卷 230-231页

作者： LI Yan-feng 1, JIANG Fa-kui 2.(1. management School, Huazhong university of {2. and technology, Wuhan 430074, china 2. department of Business Administration, Yunnan university of Finance and Economics, kunming 6502.1, china)

Yunnan university of finance and Trade recording to t he statistics of chain’s output of tea, Yunnan province has entered the ranks of the larger ones of the production in china. Yunnan’s tea industry has the natur al resources and the economic effects envied, on the orther hand, Yunnan’s tea m arket has gradually become less and the economic effects have been poor. Through our comprehensive investigation and study, we consider that because the supply chain has seriously been disjointed among production, supply and sale of tea ind ustry in Yunnan, the supply chain of Yunnan’s tea industry need to be reorganize d for the promoting the development of Yunnan’s tea industry. The essence of reengineering of Yunnan’s tea industrial supply chain is to set u p the model of the trailed operation,to strengthen the strategic partnership man agement between the supply chain, to optimize the design of the supply chain and build up and improve the working mechanism for {2. of the tea industrial supply chain. The structure of Yunnan’s model of tea industrial supply chain: the model of com mercial flow; the model of logistics flow; the model of information flow and the model of cash flow. The solutions and policies for the reorganization of Yunnan’s tea industrial sup ply chain: planning, logistics and distribution and sales. Set up the supporting system of information technology. Build up the control system of production and *** the working mechanism of Yunnan’s tea industrial supply chain. Implement the engineering of exporting Yunnan’s tea into the markets of other p rovinces and foreign markets. Have many the channels that raise the funds of dev elopment for Yunnan’s tea industry.

关键词： Yunnan tea industry reengineering supply chain building model

Spectrum characteristics and pump wavelengths of Nd_(3+) -doped double-clad fiber

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Chinese science Bulletin 1997年第11期42卷 897-900页

作者： ming Hai, YANG Bao, DONG Xiaopeng, A. Fedotov, Xudong Xiao and M. M. T. Loy1. department of Physics, {2. of science and technology of china, Hefei 2.002., china 2. department of Physics, {2. of science and technology of Hong Kong, Hong Kong, china department of Physics University of Science and Technology of China Hefei China department of Physics University of Science and Technology of Hong Kong Hong Kong China

Nd3+ -doped double-clad fiber is a new type of fiber that has large *** large receivingarea compared with single-clad rare-earth-doped *** Nd3+-doped double-clad fiberpumped directly by laser-diode arrays can be manufactured into high-power fiber lasers,high-power superfluorescence sources and high-gain fiber amplifiers,and they will be applied

关键词： double-clad fiber optimum pump wavelength optical spectrum.