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Strong invariance principle for a counterbalanced random walk

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Applied Mathematics(A Journal of Chinese Universities) 2024年第2期39卷 370-380页

作者： TAN Hui-qun HU Zhi-shui DONG Liang International Institute of finance School of ManagementUniversity of Science and Technology of ChinaHefei 230026China Center for Basic Teaching and Experiment Nanjing University of Science and TechnologyJiangyin 214443China

We study a counterbalanced random walkS_(n)=X_(1)+…+X_(n),which is a discrete time non-Markovian process andX_(n) are given recursively as *** n≥2,X_(n) is a new independent sample from some fixed law̸=0 with a fixed probability p,andX_(n)=−X_(v(n))with probability 1−p,where v(n)is a uniform random variable on{1;…;n−1}.We apply martingale method to obtain a strong invariance principle forS_(n).

关键词： random walk martingale invariance principle

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On the Initial Layer and the Limit Behavior for Chemotaxis System with the Effect of Fluid in Fourier Space

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Acta Mathematicae Applicatae Sinica 2024年第4期 1015-1024页

作者： Jian-xiang WAN Hai-ping ZHONG Department of Mathematics Jiangxi University of Finance and Economics School of Mathematics and Computer Yuzhang Normal University

The paper deals with a Cauchy problem for the chemotaxis system with the effect of fluid■where d≥*** is known that for each ?>0 and all sufficiently small initial data （u0,n0,c0） belongs to certain Fourier space,the problem possesses a unique global solution （u?,n?,c?） in Fourier *** present work asserts that these solutions stabilize to （u∞,n∞,c∞） as ?-1→***,we show that c?（t） has the initial layer as ?-1→*** one expects its limit behavior maybe give a new viewlook to understand the system.

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Asymptotic Property of Parabolic Equations Involving Pseudo-relativistic Schr?dinger Operators

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Acta Mathematicae Applicatae Sinica 2024年

作者： Chen QIAO Su-fang TANG School of Mathematics and Statistics Shaanxi Normal University School of Mathematics Xi'an University of Finance and Economics

In this paper, we investigate parabolic equations involving nonlocal pseudo-relativistic Schr?dinger operators（-△+ m2）swith s ∈（0, 1） and mass m > 0 in bounded regions. We establish the asymptotic narrow region principle and asymptotic strong maximum principle for anti symmetric function. As applications,employing the method of moving planes, we show the asymptotical radial symmetry and monotonicity of positive solutions in an unit ball.

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Comparison of the capacity of biological desulfurization of Thiobacillus ferrooxidans from different sulfur-containing substrates with or without additional ferrous iron

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 140-143页

作者： Yanjin Wang Xiaopeng Chang Hongge Tao Zhenfeng Wang Quanguo Zhang College of Environment Economics Henan Finance UniversityZhengzhou 450046China College of Mechanical and Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China

Thiobacillus ferrooxidans,abbreviated as *** is one of the important microorganisms in the field of biological *** of ferrous iron and sulfur-containing substrates on biological desulfurization of *** were *** show that in the absence of Fe^(2+),*** can utilize three kinds of sulfur-containing substrates of Na_(2)S_(2)O_(3),elemental S and Na_(2)SO_(3) for growth and *** utilization complexity,Na_(2)S_(2)O_(3) was easiest to use,next was elemental S,and Na_(2)SO_(3) was the worst for *** the utilization of ferrous iron and sulfur-containing substrates by ***,the iron oxidation system was first *** the decrease of the Fe^(2+)concentration,the sulfur oxidation system was started,and then the two systems synergistically *** presence of three sulfur-containing substrates had different effects on Fe^(2+)oxidation,and elemental S did not inhibit the oxidation of Fe^(2+),while Na_(2)S_(2)O_(3) and Na_(2)SO_(3) had some inhibition on the oxidation of Fe^(2+),especially the inhibition of Na_(2)SO_(3) was significant,and complete oxidation of ferrous iron needed more *** isolated *** is applied to the removal of H2S gas,aiming to provide a new technological approach for biological removal of H2S.

关键词： Thiobacillus ferrooxidans ferrous iron sulfur-containing substrate biological desulfurization

Global Spillovers of China's Monetary Policy

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China & World Economy 2024年第3期32卷 1-30页

作者： Wenni Lei Dongzhou Mei Mi Zhang School of Economics Minzu University of ChinaChina School of International Trade and Economics Central University of Finance and EconomicsChina

Spillovers from China's monetary policy have become increasingly obvious with China's growing importance in the global economy and its close economic and trade ties with the *** study establishes a proxy structure vector autoregression model to investigate the magnitude and transmission channel of spillovers from China to global and regional economies,taking advantage of high-frequency changes in asset prices in the financial markets to identify monetary policy *** analysis reveals that China's monetary policy can affect the global economy by influencing international trade and commodity prices but there is no evidence of China's monetary policy affecting global financial *** in China's monetary policy can cause a decline in world output whereas expansion in monetary policy can support global trade and *** study also finds that the response of emerging Asian economies to China's monetary policy shock was nearly twice that of developed economies,while the transmission path did not *** results of this study are consistent with the stylized fact that China's monetary policy plays an important role in the global trade and commodity cycle,although it does not drive the global financial cycle.

关键词： China's monetary policy commodity prices external instruments global trade spillovers

Foreign Ownership and International Trade Performance in China

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China & World Economy 2024年第2期32卷 42-72页

作者： Zhiyuan Li Yichun Lin Mingyao Xu School of Economics Fudan University Shanghai Institute of International finance and Economics China School of Economics Fudan UniversityChina

We investigate the causal relationship between foreign ownership and international trade performance by comparing foreign-acquired firms with similar domestic-acquired firms in China with regard to changes in their post-acquisition international trade *** findings indicate that foreign ownership significantly enhanced the probability of both exporting and importing,and strongly increased trade *** ownership took effect from the year of the acquisition and persisted for at least 2 *** stimulated both processing trade and ordinary trade,and expanded products and trading ***-acquisition trade performance also exhibited heterogeneity based on the different pre-acquisition and post-acquisition *** for the underlying mechanisms,we show that firms experienced significant output expansion,increased export dependence,and eased financial constraints after foreign acquisition.

关键词： domestic acquisition foreign acquisition foreign ownership international trade performance

Implementingg:a Proactive Fiscal Policy

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Qiu Shi 2024年第3期16卷 13-22页

作者： Lan Fo'an CPC Leadership Group Ministry of Finance

In 2023,China's economic aggregate exceeded 126 trillion yuan,showing an increase of 5.2%,and once more making China the largest engine of global *** in the national general public budget reached 21.68 trillion yuan,a... 详细信息

关键词： budget aggregate showing

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 *** examine stock halts’impact on corporate innovation and find that discretionary halts hinder *** also find that discretionary halts reduce information quality and increase financial constraints and agent ***-sectional tests show that this negative impact is more pronounced in samples with high shareholding ratios by large shareholders,institutional investors and private *** 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 *** 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

PSRDP:A Parallel Processing Method for Pulsar Baseband Data

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Research in Astronomy and Astrophysics 2024年第1期24卷 300-310页

作者： Ya-Zhou Zhang Hai-Long Zhang Jie Wang Xin-Chen Ye Shuang-Qiang Wang Xu Du Han Wu Ting Zhang Shao-Cong Guo Meng Zhang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese academy of Sciences Beijing 100049China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China National Astronomical Data Center Beijing 100101China Southeast University Nanjing 211189China School of Cyber Science and Engineering Qufu Normal UniversityQufu 273165China

To address the problem of real-time processing of ultra-wide bandwidth pulsar baseband data,we designed and implemented a pulsar baseband data processing algorithm(PSRDP)based on GPU parallel computing *** can perform operations such as baseband data unpacking,channel separation,coherent dedispersion,Stokes detection,phase and folding period prediction,and folding integration in GPU *** tested the algorithm using the J0437-4715 pulsar baseband data generated by the CASPSR and Medusa backends of the Parkes,and the J0332+5434 pulsar baseband data generated by the self-developed backend of the Nan Shan Radio *** obtained the pulse profiles of each baseband *** experimental analysis,we have found that the pulse profiles generated by the PSRDP algorithm in this paper are essentially consistent with the processing results of Digital Signal Processing Software for Pulsar Astronomy(DSPSR),which verified the effectiveness of the PSRDP ***,using the same baseband data,we compared the processing speed of PSRDP with DSPSR,and the results showed that PSRDP was not slower than DSPSR in terms of *** theoretical and technical experience gained from the PSRDP algorithm research in this article lays a technical foundation for the real-time processing of QTT(Qi Tai radio Telescope)ultra-wide bandwidth pulsar baseband data.

关键词： (stars:)pulsars:general methods:data analysis techniques:miscellaneous

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