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E-commerce development in rural and remote areas of BRICS countries

Journal of Integrative Agriculture 2021年第4期20卷 979-997页

作者： Karine HAJI institute for International Economics and finance Russian Foreign Trade AcademyMoscow 119285Russia

E-commerce plays an essential role in modern trade *** is expected that e-commerce volume amounted to 29 trillion USD in the world in 2017,and would grow with the spread of the Internet and information and communication technologies(ICTs).Brazil,Russia,India,China and South Africa(BRICS),together with many others,consider e-commerce a means to facilitate rapid,inclusive and sustainable economic growth,improving the living standards and alleviating *** article examines areas for potential cooperation by BRICS countries in e-commerce development across rural and remote areas to fight *** analyses the current state of e-commerce development in rural and remote areas in each of the BRICS countries,including cases of public and private initiatives to support *** article also defines the opportunities which e-commerce brings to people living in rural and remote ***,it evaluates the existing challenges and *** article concludes that despite the rapid e-commerce development in BRICS countries,and significant opportunities created,there are still issues of disproportionate e-commerce in varied regions and the lack of BRICS cooperation in this *** on a comparative and normative in-depth,systematic analysis,the article develops a set of recommendations for deepening BRICS countries'cooperation in the following areas:infrastructure in rural and remote regions;education;consumer protection;online dispute resolution;coordinated policy in the international scene,including representation of BRICS countries in international indexes,such as the Organization of Economic Co-operation and Development(OECD)Digital Services trade Restrictiveness Index(STRI).

关键词： e-commerce BRICS poverty alleviation international cooperation remote and rural areas ICT infrastructure educational cooperation online dispute resolution consumer protection online Digital STRI

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Analysis of Transition of Pension System in an Endogenous Model

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Journal of Donghua University(English Edition) 2004年第4期21卷 23-25页

作者：叶栩青 finance School Shanghai Institute of Foreign Trade Shanghai201620

In this paper we investigate the possibility of pareto improving social security reforms within a framework of endogenous growth. Belan et al. proposed a transition from a pay-as-you-go(PAYG) pension system to a system of saving-subsidization. We follow this approach and prove that a pareto improving conversion from the PAYG system to a fully funded system is possible and discuss the problem of implementing the transition to the fully funded system.

关键词： social security PAYG funded endogenous growth.

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MECHANISM IN PNEUMOTRANSPORT OF THE FIBROID SUBSTANCE

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Applied Mathematics and Mechanics(English Edition) 1999年第4期20卷 61-65页

作者：奚致中 Anhui institute of finance and trade Bengbu P R China

In this paper,the mechanism of pneumotransport of the fibroid material is discussed. It is thought that the motion of air relative to the material is the filtration of the air passing through the porous medium which is composed of the cluster of fibroid material. It is found that the deviations of the experimental data with the theoretical results are within experimental error.

关键词： fibroid substance porous medium filtration pneumotransport velocity of the collective motion of sedimentation suspended velocity concentration of material

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THREE-DIMENSIONAL ANALYSIS OF THE FLOW IN THE CYCLONES

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Applied Mathematics and Mechanics(English Edition) 1995年第6期16卷 557-564页

作者：奚致中 Anhui institute of finance and trade Bengbu Auhui P. R. China

This paper gives the detailed mathematical expression of the flow in the spherical coordinates system. Applying the law of conservation of mass, movement theorem of steady flow, and applying the mathematical method of stream function with consideration of the axis symmetry, the three components of velocity quantum of the flow are deduced in detail. Here the overall analysis of the flow is presented in the view of the concept of whole, and the paper gives the necessary corrections of some results of Ref.[1]

关键词： three-dimensional flow stream function steady flow incompressible fluid

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Ab initio study on the electronic states and laser cooling of AlCl and AlBr

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Chinese Physics B 2016年第4期25卷 92-97页

作者：杨荣唐斌高涛 College of Materials Science and Engineering Chongqing Jiaotong University institute of Atomic and Molecular Physics Sichuan University institute of finance & trade Chongqing City Management College

We investigate whether A1C1 and A1Br are promising candidates for laser cooling. We report new ab initio calculations on the ground state X1E＋ and two low-lying states （A1H and a3H） of A1C1 and A1Br. The calculated spectroscopic constants show good agreement with available theoretical and experimental results. We also obtain the permanent dipole moments （PDMs） curve at multi-reference configuration interaction （MRCI） level of theory. The transition properties of A1H and a3H states are predicted, including the transition dipole moments （TDMs）, Franck-Condon factors （FCFs）, radiative times and radiative width. The calculated radiative lifetimes are of the order of a nanosecond, implying that they are sufficiently short for rapid laser cooling. Both A1C1 and A1Br have highly diagonally distributed FCFs which are crucial requirement for molecular laser cooling. The results demonstrate the feasibility of laser cooling A1C1 and A1Br, and we propose laser cooling schemes for A1C1 and A1Br.

关键词： A1C1 AIBr laser cooling

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Japanese Enterprises' Investment in China's Software Industry

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China & World Economy 2006年第4期14卷 93-104页

作者： Changhong Pei Linbo Jing institute of finance and trade Economics Chinese Academy of Social Sciences Beijing China

The present paper introduces the overall situation of investment in China by Japanese enterprises. It focuses on the cooperation between Chinese and Japanese enterprises in the software industry. It gives a detailed account of strategic investment by Japanese enterprises, their joint-venture projects with Chinese investors and establishment of R＆D centers and laboratories in China＇s software industry, and it analyzes the problems and prospects of Japanese investment in China＇s software industry. The paper suggests that it is of vital to maintain friendly Sino-Japanese relations, to strengthen bilateral economic cooperation and to enhance mutaal political confidence.

关键词： economic cooperation investment in China Japanese enterprises software industry

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On the Symbiotic Modes of SMEs and Large Enterprises Based on Symbiotic Energy and Medium

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学术界 2017年第6期 282-287页

作者： Feng Delian Anhui University of finance and trade Bengbu Anhui 233030

There are three varieties of symbiotic modes of SMEs and large enterprises based on symbiosis energy,including commensalisms,asymmetry mutualism and symmetry *** symbiotic mediums(such as stock ownership,contract,trust,etc.) have an important influence on symbiotic *** the angle of symbiotic medium view,there are some measures that promote symbiotic modes toward symmetry mutualism,such as optimizing stock ownership structure of subsidiary company,promoting mid-system organization growth,building good faith cultural atmosphere.

关键词： SME Large enterprise symbiosis mode

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An Anonymous Authentication Scheme Withstanding the Conspiracy Attack

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Wuhan University Journal of Natural Sciences 2016年第5期21卷 415-420页

作者： YIN Fengmei PU Guangning Department of Public Computer Teaching Hefei Normal University Xueyan trade Faculty Anhui Finance and Trade Vocational College

A novel anonymous authentication scheme is proposed based on the ring signature. In the scheme, the private key and the the freely chosen anonymity set are used to achieve anonymous authentication. In terms of the threshold sharing, a group of t members jointly implement threshold tracking. In order to improve the security of tracking, message recovery equation is used to verify and recover data leaked by the user. Compared with Liu et al’s scheme, the proposed scheme can resist conspiracy tracking and has less computational cost. On the premise of the discrete-logarithm-based assumption put forth by Lysyanskaya, Rivest, Sahai, and Wolf（LRSW） and Diffie-Hellman（DDH） assumption, the scheme is proved to meet the demands of anonymous authentication. The scheme has broad application prospects in many fields such as ad hoc network, electronic voting, and so on.

关键词： anonymous authentication anonymous tracking threshold conspiracy attack

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Impact of Electricity Shortages on Productivity: Evidence from Manufacturing Industries

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Energy Engineering 2021年第4期118卷 995-1008页

作者： Xinhong Xue Zhongcheng Wang School of finance Anhui University of Finance&EconomicsBengbu233030China School of International trade and Economics Anhui University of Finance&EconomicsBengbu233030China

Electricity shortages present a significant constraint on manufacturers,who rely on electricity as an important input into *** China,electricity supply has been growing ***,the rapid industrialization sometimes makes the power supply still unable to meet the *** a survey of 1673 Chinese manufacturing firms,this paper explores how firms response to electricity shortages and its impact on *** find that self-generation of electricity and investment in Research and Development(R&D)have significant positive relationships with electricity *** investigations reveal that self-generation is the most common way to deal with electricity ***,it aggravates productivity *** investment in Research and Development can promote productivity,it cannot offset the negative impact of electricity shortages on *** on subsamples show heterogeneity in the impacts of electricity shortages across *** particular,large firms are more inclined to invest in R&D than small and medium-sized firms *** are also the one who suffer significant productivity loss due to self-generation of *** it is possible for medium-sized firms to reduce productivity loss through R&D,they are not likely to invest in R&D as a response to electricity *** study illustrates that firms can hardly have effective solutions to electricity shortages,and policy makers should take great efforts to increase electricity supply.

关键词： Electricity shortages research and development productivity electricity efficiency

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Mobile Rayleigh Doppler wind lidar based on double-edge technique

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Chinese Optics Letters 2010年第8期8卷 726-731页

作者：唐磊舒志峰董吉辉王国成汪永涛徐文静胡冬冬陈廷娣窦贤康孙东松 Hyunki Cha Anhui institute of Optics and Fine Mechanics Chinese Academy of Sciences Computer Department Anhui Finance and Trade Vocational College School of Earth and Space Sciences University of Science and Technology of China Korea Atomic Energy Research institute

We describe a mobile molecular Doppler wind lidar （DWL） based on double-edge technique for wind measurement of altitudes ranging from 10 to 40 km. A triple Fabry-Perot etalon is employed as a frequency discriminator to determine the Doppler shift proportional to the wind velocity. The lidar operates at 355 nm with a 45-cm-aperture telescope and a matching azimuth-over-elevation scanner that provides full hemispherical pointing. To guarantee wind accuracy, a single servo loop is used to monitor the outgoing laser frequency to remove inaccuracies due to the frequency drift of the laser or the etalon. The standard deviation of the outgoing laser frequency drift is 6.18 MHz and the corresponding velocity error is 1.11 m/s. The wind profiles measured by the DWL are in good agreement with the results of the wind profile radar （WPR）. Evaluation is achieved by comparing at altitudes from 2 to 8 km. The relative error of horizontal wind speed is from 0.8 to 1.8 m/s in the compared ranges. The wind accuracy is less than 6 m/s at 40 km and 3 m/s at 10 km.

关键词： Boundary layer flow Etalons

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