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Crowding-in or Crowding-out:How Infrastructure Investment Affects Household Consumption

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China Finance and Economic Review 2024年第1期13卷 43-66页

作者： Zhiyu Yan Yufei Yuan Yi Xue school of international Business and Economics University of International Business and Economics

This paper constructs a dynamic model of household consumption decisions and accordingly designs empirical analyses to identify how infrastructure investment affects private *** estimation results of provincial panel data reveal that infrastructure investment can not only indirectly promote household consumption through the income channel but also directly promote household consumption expansion through the expectations channel,with a significant"crowding-in"***,the effect is significantly weaker in provinces with a lower housing supply elasticity,showing the"crowding-out"pattern through the wealth *** survey data provide an explanation for individual *** investment has a greater pushing effect on house prices in provinces with a lower housing supply *** house price growth has significant"crowding-out"effects on the consumption of wealthy *** not only significantly weakens the driving effect of infrastructure investment on aggregate household consumption,but also increases wealth inequality in the long *** paper explains how infrastructure investment affects household consumption and the corresponding role played by house prices,providing empirical evidences for theoretical studies related to macro-regulatory policies in China.

关键词： infrastructure investment household consumption housing supply elasticity macro regulatory policies

Manipulation of band gap in 1T-TiSe_(2) via rubidium deposition

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Chinese Physics B 2024年第8期33卷 102-106页

作者：欧仪陈磊信子鸣任宇靖袁鹏浩王政国朱玉陈景芝张焱 international Center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China

The 1T-TiSe_(2) is a two-dimensional charge-density-wave(CDW)material that attracts great interest.A small band gap locates at the Fermi level separating the Ti d-bands and Se p-bands,which makes 1T-TiSe_(2) a promising candidate for realizing excitonic ***,we studied the band gap in 1T-TiSe_(2) using angle-resolved photoemission spectroscopy(ARPES).Instead of only focusing on the in-plane band dispersions,we obtained the detailed band dispersions of both conduction and valance bands along the out-of-plane *** found that the conduction and valance bands split into multiple sub-bands in the CDW state due to band *** a result,the band gap between the Ti d-bands and Se p-bands reduces to~25 meV and becomes a direct gap in the CDW *** intriguingly,such band gap can be further reduced by the rubidium *** band structure becomes semimetallic in the rubidium-doped ***,exotic gapless behaviors were observed at the p-d band *** result characterized the band gap of 1T-TiSe_(2) in three-dimensional Brillouin zone with unpreceded *** also suggests a closing of band gap or a potential band inversion in 1T-TiSe_(2) driven by rubidium deposition.

关键词： angle-resolved photoemission spectroscopy metal–insulator transition transition metal dichalcogenides

A large-scale cold plasma jet: generation mechanism and application effect

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Plasma Science and Technology 2024年第4期26卷 1-8页

作者：崔伟胜张若兵 Shenzhen international Graduate school Tsinghua UniversityShenzhen 518055People’s Republic of China

Atmospheric pressure cold plasma jets(APCPJs) typically exhibit a slender, conical structure,which imposes limitations on their application for surface modification due to the restricted treatment area. In this paper, we introduce a novel plasma jet morphology known as the large-scale cold plasma jet(LSCPJ), characterized by the presence of both a central conical plasma jet and a peripheral trumpet-like diffuse plasma jet. The experimental investigations have identified the factors influencing the conical and the trumpet-like diffuse plasma jet, and theoretical simulations have shed light on the role of the flow field and the electric field in shaping the formation of the LSCPJ. It is proved that, under conditions of elevated helium concentration, the distributions of impurity gas particles and the electric field jointly determine the plasma jet’s morphology. High-speed ICCD camera images confirm the dynamic behavior of plasma bullets in LSCPJ, which is consistent with the theoretical analysis. Finally, it is demonstrated that when applied to the surface treatment of silicone rubber, LSCPJ can achieve a treatment area over 28 times larger than that of APCPJ under equivalent conditions. This paper uncovers the crucial role of impurity gases and electric fields in shaping plasma jet morphology and opens up the possibility of efficiently diversifying plasma jet generation effects through external electromagnetic fields. These insights hold the promise of reducing the generation cost of plasma jets and expanding their applications across various industrial sectors.

关键词： diffuse plasma jet flow field electric field surface treatment

Industrial Policy,Product Switching,and Export Performance

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China & World Economy 2024年第1期32卷 167-196页

作者： Jiemiao Dong Zhuangxiong Yu Xunpeng Shi Yang Yang school of Economics and Trade Guangdong University of Foreign StudiesChina Institute of Industrial Economics Jinan UniversityChina Australia-China relations Institute University of Technology SydneyAustrialia international school of Business&Finance Sun Yat-sen UniversityChina

Industrial policy can promote economic growth and industrial upgrading by encouraging enterprises to adopt product *** utilizing comprehensive industrial policies and customs trade databases from 2000 to 2015,this paper found that firms with product ranges within policy-supported areas were more active in product *** all the enterprises that adopted the product switching,those with nonmain products in policy-supported areas were more inclined to adjust their main *** tended to transform nonmain product to main product as opposed to introducing new main product in order to effectively leverage their export experience and established ***,for enterprises whose main product was within the policy-supported areas,their tendency to switch products significantly *** analysis suggested that policy support,by alleviating industry distress and mitigating excessive market competition,encouraged firms to switch products to areas with policy ***,we estimated trade performance after product switching from the perspective of product unit price and export product *** found that for firms whose main product was in policy-supported areas,such switching was more likely to result in“low price,high quality”exports,whereas for firms with nonmain products in supported areas,such switching was more likely to lead to“high price,low quality”exports,which indicates that firms switching to policy-supported areas need to continuously develop their core competencies and operate effectively to improve their production performance.

关键词： export performance high-quality development industrial policy product switching

Improved Twin Support Vector Machine Algorithm and Applications in Classification Problems

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China Communications 2024年第5期21卷 261-279页

作者： Sun Yi Wang Zhouyang Beijing University of Posts and Telecommunications School of Computer Science(National Pilot Software Engineering School) Beijing University of Posts and Telecommunications International School

The distribution of data has a significant impact on the results of *** the distribution of one class is insignificant compared to the distribution of another class,data imbalance *** will result in rising outlier values and ***,the speed and performance of classification could be greatly *** the above problems,this paper starts with the motivation and mathematical representing of classification,puts forward a new classification method based on the relationship between different classification *** with the vector characteristics of the actual problem and the choice of matrix characteristics,we firstly analyze the orderly regression to introduce slack variables to solve the constraint problem of the lone *** we introduce the fuzzy factors to solve the problem of the gap between the isolated points on the basis of the support vector *** introduce the cost control to solve the problem of sample ***,based on the bi-boundary support vector machine,a twostep weight setting twin classifier is *** can help to identify multitasks with feature-selected patterns without the need for additional optimizers,which solves the problem of large-scale classification that can’t deal effectively with the very low category distribution gap.

关键词： fuzzy ordered regression(OR) relaxing variables twin support vector machine

Recent progress about transmission electron microscopy characterizations on lithium-ion batteries

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Journal of Energy Chemistry 2024年第8期95卷 39-56,I0002页

作者： Yihang Liu Qiuyun Li Ziqiang Wang Institute of Materials Research Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518000GuangdongChina

With the rapid development of portable electronics,new energy vehicles,and smart grids,ion batteries are becoming one of the most widely used energy storage devices,while the safety concern of ion batteries has always been an urgent problem to be *** develop a safety-guaranteed battery,the characterization of the internal structure is indispensable,where electron microscopy plays a crucial *** on this,this paper summarizes the application of transmission electron microscopy(TEM)in battery safety,further concludes and analyzes the aspects of dendrite growth and solid electrolyte interface(SEI)formation that affect the safety of ion batteries,and emphasizes the importance of electron microscopy in battery safety research and the potential of these techniques to promote the future development of this *** advanced electron microscopy techniques and their prospects are also discussed.

关键词： Electron microscopy characterizations Lithium-ion batteries Dendrites SEI

Xinjiang Blossoming Under Rule of Law

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Beijing Review 2024年第37期67卷 20-21页

作者： Yasir Habib Khan Pakistan's Institute of international relations and Media Research

Contrary to the West's false and misleading information regarding repression of Uygur Muslims in Xinjiang Uygur Autonomous Region,Islam is blossoming with all its religious colors and traditional fashion under the *** is an eye-witness observation of a nine-member Pakistani media delegation that visited Urumqi and Yining cities from August 19 to *** delegation visited the Xinjiang Counter-Terrorism and Counter-Extremism Exhibition,Xinjiang Islamic Institute(XII),Xinjiang Art Theater Muqam Art Troupe,Xinjiang international Grand Bazaar,Shaanxi Mosque and other places.

关键词： Xinjiang delegation religious

Local thermal conductivity of inhomogeneous nano-fluidic films:A density functional theory perspective

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Chinese Physics B 2024年第4期33卷 594-603页

作者：孙宗利康艳霜康艳梅 Department of Mathematics and Physics North China Electric Power UniversityBaoding 071003China College of Science Hebei Agricultural UniversityBaoding 071001China Hebei Key Laboratory of Physics and Energy Technology Baoding 071003China University of international relations Beijing 100091China

Combining the mean field Pozhar-Gubbins(PG)theory and the weighted density approximation,a novel method for local thermal conductivity of inhomogeneous fluids is *** correlation effect that is beyond the mean field treatment is taken into account by the simulation-based empirical *** application of this method to confined argon in slit pore shows that its prediction agrees well with the simulation results,and that it performs better than the original PG theory as well as the local averaged density model(LADM).In its further application to the nano-fluidic films,the influences of fluid parameters and pore parameters on the thermal conductivity are calculated and *** is found that both the local thermal conductivity and the overall thermal conductivity can be significantly modulated by these ***,in the supercritical states,the thermal conductivity of the confined fluid shows positive correlation to the bulk density as well as the ***,when the bulk density is small,the thermal conductivity exhibits a decrease-increase transition as the temperature is *** is also the case in which the temperature is *** fact,the decrease-increase transition in both the small-bulk-density and low-temperature cases arises from the capillary condensation in the ***,smaller pore width and/or stronger adsorption potential can raise the critical temperature for condensation,and then are beneficial to the enhancement of the thermal *** modulation behaviors of the local thermal conductivity lead immediately to the significant difference of the overall thermal conductivity in different phase regions.

关键词： thermal conductivity nano-fluidic films density functional theory

Registration system reform and initial public offering ownership preference:Evidence from China

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China Journal of Accounting Research 2024年第1期17卷 74-95页

作者： Xihao Wu Di Zhang Zhongxin Wu international Business school Hainan UniversityChina

Whether registration system reform(RSR)can curb administrative intervention and create a fair market environment has long been a concern in *** explore this issue from the perspective of the initial public offering(IPO)preference based on the entropy balancing method,and findings are as ***,an IPO ownership preference exists under approval *** is,state-owned enterprises(SOEs)are more likely than private enterprises to obtain IPO ***,RSR significantly changes this preference,especially for non-politically connected private ***,the post-IPO market performance of SOEs is inferior to that of private enterprises under approval system,thus excluding the view that approval is prioritized for SOEs because of superior ***,compared with SOEs,private enterprises are more likely to switch the issuance system from approval system to registration system;this change makes it easier for them to obtain IPO approval,indicating that private enterprise owners perceive the registration channel to be ***,the effect of RSR on IPO ownership preference mainly occurs in companies in three major urban agglomerations in China—the Pearl River Delta,the Yangtze River Delta,and the Beijing–Tian jin–Hebei region—and in technology-intensive ***,our findings reveal that RSR cultivates a fairer IPO approval process.

关键词： Registration system reform Administrative intervention Approval system IPO ownership preference