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Spatial Differentiation and Convergence Trend of High-quality Development Level of China’s Tourism Economy

Chinese Geographical Science 2024年第2期34卷 230-249页

作者： CAO Shanshan HE Zhaoli NIU Jinlan WANG Songmao ZHAO Lei school of Geography and Ocean Science Nanjing UniversityNanjing 210046China school of business Administration Nanjing University of Finance and EconomicsNanjing 210046China school of Economics and Management Shandong Agricultural Uni-versityTai’an 271018China school of Hotel Management Shanghai Business SchoolShanghai 201400China school of Man-agement Zhejiang University of TechnologyHangzhou 310014China

This paper aims to interpret the connotation of high-quality development of tourism economy(HQTE)from the perspective of the new development concepts of innovation,coordination,green,openness and sharing,and then to evaluate the spatial differenti-ation of China’s HQTE based on provincial panel data from 2009 to 2018.Specifically,we employ the spatial convergence model to ex-plore the absolute and conditionalβconvergence trends of HQTE in the whole country and the eastern,central and western regions of China.Our empirical results reveal that:1)within the decade,from 2009 to 2018,regions of China with the highest HQTE index is its eastern region followed by the central region and then the western region,but the fastest growing one is the western region of China fol-lowed by the central region and then the eastern region.2)Whether or not the spatial effect is included,there are absolute and condition-alβconvergence in HQTE in the whole country and aforementioned three regions.3)The degree of government attention as well as the level of economic development and location accessibility are the positive driving factors for the convergence of HQTE in the whole country and the three regions.The degree of marketization and human capital have not passed the significance test either in the whole country or in the three regions.The above conclusions could deepen the understanding of the regional imbalance and spatial conver-gence characteristics of HQTE,clarify the primary development objects,and accomplish the goal of China’s HQTE.

关键词： new development concepts high-quality development of tourism economy(HQTE) spatial convergence China

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A Superior Sales Mode for a Two-Echelon Supply Chain of Perishable Products

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Journal of Systems Science and Information 2024年第2期12卷 274-293页

作者： Mengqi BAO Xiaozhen DAI school of Management Wenzhou Business CollegeWenzhou 325035China

This paper considers sales mode selection issues for a two-echelon supply chain of perishable products involving a supplier and a retailer.Consumers’purchase desire is assumed to be positive correlation with the freshness of the product.First,the traditional sales mode is examined,in which the supplier and the retailer play a Stackelberg game.We propose a three-layer decision model for this situation,and obtain dynamic pricing strategies and selling cycle length.It is shown that the retailer has little motivation to order many perishable products so as to avoid a long selling cycle length.Second,the commission-charge mode is analyzed,in which the retailer declares its decision first.In this mode,we demonstrate that the perishable product will be on sale during the whole shelf life under a certain condition.The correlation between the sales price of each stage and the remaining shelf-life length is analyzed.Third,the superiority analysis for the two sales modes is conducted.We show the relation between the selling cycle lengths of the two modes.By our analysis,it is shown that both the supplier and the retailer gain more profits when the commission-charge mode is adopted and the commission rate locates in a certain open interval.Finally,a numerical illustration is presented to visualize the discussed models,and some supplements are made for the acquired conclusions by the illustration.

关键词： pricing sales mode commission-charge mode selling cycle length superiority analysis

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Import Policy Uncertainty and Innovation

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China & World Economy 2024年第1期32卷 197-230页

作者： Lingshan Chen Yunong Li Qian Xie Mao Zhou school of International business Southwestern University of Finance and Economics(SWUFE)China school of International business SWUFEChina Institute of Economics Chinese Academy of Social SciencesChina

The Chinese government has emphasized innovation as the primary driving force for economic development in the new era.This paper studies the effect of import policy uncertainty(IPU)on the innovation activity of Chinese manufacturing firms.It establishes a simple model to show that the presence of IPU encourages innovation and that a reduction in IPU discourages innovation.It distinguishes the almost unnoticed IPU reduction from tariff reduction on China's WTO accession and develops a novel difference-in-differences specification that identifies the negative effect of IPU reduction on innovation using updated data for Chinese manufacturing and patent filings.The result holds after a battery of identification assumptions and robustness checks are considered.The import channel explains about two thirds of the effect of IPU on innovation,but not all of the effect.Finally,this paper examines the effect across firms of different levels of productivity and ownership types and patents of different categories.

关键词： import policy uncertainty innovation patent WTO

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Grassland-type ecosystem stability in China differs under the influence of drought and wet events

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Journal of Arid Land 2024年第5期16卷 615-631页

作者： CAO Wenyu BAI Jianjun YU Leshan school of Geography and Tourism Shaanxi Normal UniversityXi'an 710119China International business school Shaanxi Normal UniversityXi'an 710119China

Ecological stability is a core issue in ecological research and holds significant implications forhumanity. The increased frequency and intensity of drought and wet climate events resulting from climatechange pose a major threat to global ecological stability. Variations in stability among different ecosystemshave been confirmed, but it remains unclear whether there are differences in stability within the sameterrestrial vegetation ecosystem under the influence of climate events in different directions and intensities.China's grassland ecosystem includes most grassland types and is a good choice for studying this issue.This study used the Standardized Precipitation Evapotranspiration Index-12 (SPEI-12) to identify thedirections and intensities of different types of climate events, and based on Normalized DifferenceVegetation Index (NDVI), calculated the resistance and resilience of different grassland types for 30consecutive years from 1990 to 2019 (resistance and resilience are important indicators to measurestability). Based on a traditional regression model, standardized methods were integrated to analyze theimpacts of the intensity and duration of drought and wet events on vegetation stability. The resultsshowed that meadow steppe exhibited the highest stability, while alpine steppe and desert steppe had thelowest overall stability. The stability of typical steppe, alpine meadow, temperate meadow was at anintermediate level. Regarding the impact of the duration and intensity of climate events on vegetationecosystem stability for the same grassland type, the resilience of desert steppe during drought was mainlyaffected by the duration. In contrast, the impact of intensity was not significant. However, alpine steppewas mainly affected by intensity in wet environments, and duration had no significant impact. Ourconclusions can provide decision support for the future grassland ecosystem governance.

关键词： grassland ecosystem stability resistance resilience different climate types drought climate event wet climate event

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Study on site selection planning of urban electric vehicle charging station

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High Technology Letters 2024年第1期30卷 75-84页

作者：刘娜 CHENG Jiaxin DUAN Yukai school of business Shanghai Dianji UniversityShanghai201306 P.R.China

The large-scale development of electric vehicles(EVs)requires numerous charging stations to serve them,and the charging stations should be reasonably laid out and planned according to the charging demand of electric vehicles.Considering the costs of both operators and users,a site selection model for optimal layout planning of charging stations is constructed,and a queuing theory approach is used to determine the charging pile configuration to meet the charging demand in the planning area.To solve the difficulties of particle swarm global optimization search,the improved random drift particle swarm optimization(IRDPSO)and Voronoi diagram are used to jointly solve for the optimal layout of electric vehicles.The final arithmetic analysis verifies the feasibility and practicality of the model and algorithm,and the results show that the total social cost is minimized when the charging station is 9,the location of the charging station is close to the center of gravity and the layout is reasonable.

关键词： charging station electric vehicle(EV) improved random drift particle swarm optimization(IRDPSO) optimal planning

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Effects of combustion temperature on the optical properties of brown carbon from biomass burning

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Journal of Environmental Sciences 2024年第3期137卷 302-309页

作者： Peng Gao Rule Deng Song Jia Yue Li Xuefei Wang Qian Xing school of Chemistry Sciences University of Chinese Academy of SciencesBeijing 100049China College of Chemistry and Materials Engineering Beijing Technology and Business UniversityBeijing 100048China

Biomass burning has been known as one of main sources of Brown Carbon(BrC)in atmosphere.In this study,by controlling the combustion temperature at 250℃,350℃,and 450℃,the methanol soluble organic carbon(MSOC)and methanol insoluble carbon(MISC)from pine wood burning was collected by impinger.UV–Vis,excitation emission matrix(EEM),TEM and FTIR spectra were applied to investigate the properties of BrC collected.For MSOC at 250℃ and 350℃,all the spectral profiles of UV–Vis absorption and excitation emission matrix are almost the same,while the EEM of MSOC at 450℃ are different from that of the other two.For MISC fuorescence was observed only in the case of 450℃.In the FTIR spectra,with the temperature increasing the peaks associated to the oxygen-contained functions was weakened,indicating the formation of the fuorophores with larger conjugated system,especially aromatic hydrocarbons.Our results show that biomass combustion at low temperature produces more oxygen-riched BrC,which possesses relatively lower light absorption,while at high temperature produces more aromatics hydrocarbons with relatively strong light absorption.The results of this work are helpful to trace the source of brown carbon and optimize biomass energy utilization.

关键词： Biomass burning Combustion temperature Methanol-soluble brown carbon EEM Impinger

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Semi-Varying Coefficient Panel Data Model with Technical Indicators Predicts Stock Returns in Financial Market

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Journal of Systems Science & Complexity 2024年第4期37卷 1638-1652页

作者： HU Xuemei PAN Ying LI Xiang school of Mathematics and Statistics Chongqing Technology and Business University Chongqing Key Laboratory of Social Economy and Applied Statistics Research Center for Economy of Upper Reaches of the Yangtse River Chongqing Technology and Business University

Accurately predicting stock returns is a conundrum in financial market. Solving this conundrum can bring huge economic benefits for investors and also attract the attention of all circles of people. In this paper the authors combine semi-varying coefficient model with technical analysis and statistical learning, and propose semi-varying coefficient panel data model with individual effects to explore the dynamic relations between the stock returns from five companies: CVX, DFS, EMN, LYB,and MET and five technical indicators: CCI, EMV, MOM, ln ATR, ln RSI as well as closing price(ln CP), combine semi-parametric fixed effects estimator, semi-parametric random effects estimator with the testing procedure to distinguish fixed effects(FE) from random effects(RE), and finally apply the estimated dynamic relations and the testing set to predict stock returns in December 2020 for the five companies. The proposed method can accommodate the varying relationship and the interactive relationship between the different technical indicators, and further enhance the prediction accuracy to stock returns.

关键词： Fixed effects random effects semi-varying coefficient panel data model stock returns technical indicators

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Dynamics of information diffusion and disease transmission in time-varying multiplex networks with asymmetric activity levels

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Chinese Physics B 2024年第3期33卷 690-699页

作者：谢笑笑霍良安董雅芳程英英 business school University of Shanghai for Science and TechnologyShanghai 200093China school of Intelligent Emergency Management University of Shanghai for Science and TechnologyShanghai 200093China school of Management Henan University of Science and TechnologyLuoyang 471023China

While the interaction between information and disease in static networks has been extensively investigated,many studies have ignored the characteristics of network evolution.In this study,we construct a new two-layer coupling model to explore the interactions between information and disease.The upper layer describes the diffusion of disease-related information,and the lower layer represents the disease transmission.We then use power-law distributions to examine the influence of asymmetric activity levels on dynamic propagation,revealing a mapping relationship characterizing the interconnected propagation of information and diseases among partial nodes within the network.Subsequently,we derive the disease outbreak threshold by using the microscopic Markov-chain approach(MMCA).Finally,we perform extensive Monte Carlo(MC)numerical simulations to verify the accuracy of our theoretical results.Our findings indicate that the activity levels of individuals in the disease transmission layer have a more significant influence on disease transmission compared with the individual activity levels in the information diffusion layer.Moreover,reducing the damping factor can delay disease outbreaks and suppress disease transmission,while improving individual quarantine measures can contribute positively to disease control.This study provides valuable insights into policymakers for developing outbreak prevention and control strategies.

关键词： information diffusion disease transmission asymmetric activity levels quarantine strength

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Agricultural Investment Project Decisions Based on an Interactive Preference Disaggregation Model Considering Inconsistency

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 3125-3146页

作者： Xingli Wu Huchang Liao Shuxian Sun Zhengjun Wan business school Sichuan UniversityChengdu610064China National Institute of Measurement and Testing Technology Chengdu610021China

Agricultural investment project selection is a complex multi-criteria decision-making problem,as agricultural projects are easily influenced by various risk factors,and the evaluation information provided by decisionmakers usually involves uncertainty and inconsistency.Existing literature primarily employed direct preference elicitation methods to address such issues,necessitating a great cognitive effort on the part of decision-makers during evaluation,specifically,determining the weights of criteria.In this study,we propose an indirect preference elicitation method,known as a preference disaggregation method,to learn decision-maker preference models fromdecision examples.To enhance evaluation ease,decision-makers merely need to compare pairs of alternatives with which they are familiar,also known as reference alternatives.Probabilistic linguistic preference relations are employed to account for the presence of incomplete and uncertain information in such pairwise comparisons.To address the inconsistency among a group of decision-makers,we develop a pair of 0-1mixed integer programming models that consider both the semantics of linguistic terms and the belief degrees of decision-makers.Finally,we conduct a case study and comparative analysis.Results reveal the effectiveness of the proposed model in solving agricultural investment project selection problems with uncertain and inconsistent decision information.

关键词： Multiple criteria analysis preference disaggregation inconsistency probability linguistic preference relation investment project selection

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Stock transferability,the managerial learning effect and corporate innovation

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China Journal of Accounting Research 2024年第1期17卷 1-27页

作者： Xuehang Yu Junxiong Fang school of business East China University of Science and TechnologyChina school of Accounting Zhejiang University of Finance and EconomicsChina

This paper considers stock halts to study the impact of stock liquidity loss on the managerial learning effect based on stock prices.We examine stock halts’impact on corporate innovation and find that discretionary halts hinder innovation.We also find that discretionary halts reduce information quality and increase financial constraints and agent costs.Cross-sectional tests show that this negative impact is more pronounced in samples with high shareholding ratios by large shareholders,institutional investors and private firms.The results indicate that the loss of non-institutional stock trading rights,represented by discretionary stock halts,affects revelatory price efficiency in the secondary market,hinders managers’learning effect and affects enterprises’production and operation decisions.These findings have policy implications for stock circulation-right protection and Chinese capital-market reform.

关键词： Stock circulation rights loss Discretionary stock halt Managerial learning effect Innovation

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