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Central environmental protection inspection and carbon emission reduction: A tripartite evolutionary game model from the perspective of carbon neutrality

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Petroleum Science 2024年第3期21卷 2139-2153页

作者： Zhen-Hua Zhang Dan Ling Qin-Xin Yang Yan-Chao Feng Jing Xiu School of economics Lanzhou UniversityLanzhou 730000GansuChina Institute of Green finance Lanzhou UniversityLanzhou 730000GansuChina School of Management Lanzhou UniversityLanzhou 730000GansuChina School of Business Zhengzhou UniversityZhengzhou 450001HenanChina Institute of economics Jilin Academy of Social SciencesChangchun130033JilinChina

Since the carbon neutrality target was proposed,many countries have been facing severe challenges to carbon emission reduction *** study is conducted using a tripartite evolutionary game model to explore the impact of the central environmental protection inspection(CEPI)on driving carbon emission reduction,and to study what factors influence the strategic choices of each party and how they interact with each *** research results suggest that local governments and manufacturing enterprises would choose strategies that are beneficial to carbon reduction when CEPI *** the initial willingness of all parties increases 20%,50%—80%,the time spent for the whole system to achieve stability decreases from 100%,60%—30%.The evolutionary result of“thorough inspection,regulation implementation,low-carbon management”is the best strategy for the tripartite evolutionary ***,the smaller the cost and the larger the benefit,the greater the likelihood of the three-party game stability strategy *** study has important guiding significance for other developing countries to promote carbon emission reduction by environmental policy.

关键词： Central environmental protection inspection Local government Manufacturing enterprise Tripartite evolutionary game Carbon emission reduction

Heteroscedasticity Detection and Estimation with Quantile Difference Method

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Journal of Systems Science & Complexity 2016年第2期29卷 511-530页

作者： XIA Wentao XIONG Wei TIAN Maozai School of Statistics Lanzhou University of Finance and Economics School of Statistics University of International Business and Economics Center for Applied Statistics School of StatisticsRenmin University of China

When dealing with regression analysis,heteroscedasticity is a problem that the authors have to face *** if little information can be got in advance,detection of heteroscedasticity as well as estimation of statistical models could be even more *** this end,this paper proposes a quantile difference method(QDM) that can effectively estimate the heteroscedastic *** method,being completely free from the estimation of mean regression function,is simple,robust and easy to ***,the QDM method enables the detection of heteroscedasticity without any restrictions on error terms,consequently being widely *** is worth mentioning is that based on the proposed approach estimators of both mean regression function and heteroscedastic function can be *** the end,the authors conduct some simulations to examine the performance of the proposed methods and use a real data to make an illustration.

关键词： Heteroscedastic function estimation heteroscedasticity testing mean regression function quantile difference.

ON COLLISION LOCAL TIME OF TWO INDEPENDENT FRACTIONAL ORNSTEIN-UHLENBECK PROCESSES

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Acta Mathematica Scientia 2017年第2期37卷 316-328页

作者：郭精军李楚进 School of Statistics Lanzhou University of Finance and Economics School of Mathematics and Statistics Huazhong University of Science and Technology

In this article, we study the existence of collision local time of two indepen- dent d-dimensional fractional Ornstein-Uhlenbeck processes X＋^H1 and Xt^H2 with different parameters Hi ∈ （0, 1）,i = 1, 2. Under the canonical framework of white noise analysis, we characterize the collision local time as a Hida distribution and obtain its＇ chaos expansion. Key words Collision local time; fractional Ornstein-Uhlenbeck processes; generalized white noise functionals; choas expansion

关键词： Collision local time fractional Ornstein-Uhlenbeck processes generalized white noise functionals choas expansion

Where is the future of China's biogas? Review, forecast,and policy implications

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Petroleum Science 2016年第3期13卷 604-624页

作者： Lei Gu Yi-Xin Zhang Jian-Zhou Wang Gina Chen Hugh Battye College of Earth and Environmental Sciences Lanzhou University School of Mathematics and Statistics Lanzhou University School of Statistics Dongbei University of Finance and Economics School of Law Northwestern University School of History and Culture Lanzhou University Department of economics The London School of Economics and Political Science

This paper discusses the history and present status of different categories of biogas production in China,most of which are classified into rural household production,agriculture-based engineering production,and industry-based engineering *** evaluate the future biogas production of China,five models including the Hubbert model,the Weibull model,the generalized Weng model,the H-C-Z model,and the Grey model are applied to analyze and forecast the biogas production of each province and the entire *** is proved that those models which originated from oil research can also be applied to other energy *** simulation results reveal that China＇s total biogas production is unlikely to keep on a fast-growing trend in the next few years,mainly due to a recent decrease in rural household production,and this greatly differs from the previous goal set by the official *** addition,China＇s biogas production will present a more uneven pattern among regions in the *** paper will give preliminary explanation for the regional difference of the three biogas sectors and propose some recommendations for instituting corresponding policies and strategies to promote the development of the biogas industry in China.

关键词： Biogas production China Temporal–spatial Forecast Policy

Vibration and Buckling Analysis of Piezoelectric Nanowires Based on Surface Energy Density

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Acta Mechanica Solida Sinica 2021年第3期34卷 425-436页

作者： Liyuan Wang Hongjun Han Key Laboratory of Mechanics on Disaster and Environment in Western China the Ministry of EducationCollege of Civil Engineering and MechanicsLanzhou UniversityLanzhou 730000China Longqiao College of lanzhou university of finance and economics Lanzhou 730101China

In this paper,the influences of surface effects on free transverse vibration and buckling of piezoelectric nanowires are investigated by surface energy density elasticity *** relations are given for the natural frequencies of nanowires by taking into account the effects of surface energy density and surface relaxation *** implementing this theory with consideration of surface effects under clamped-clamped boundary conditions,the natural frequencies of nanowires are *** is shown that the natural frequency depends on both the surface effects and piezoelectricity.A closed-form solution is also obtained to calculate the critical buckling *** study is expected to provide useful insights for the design of piezoelectric nanowire-based nanodevices.

关键词： Surface effects Piezoelectric nanowires Vibration Buckling Natural frequency Critical electric potential

VUV-excited luminescence properties of Tb^(3+) activated BaGdB_9O_(16)

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Journal of Rare Earths 2010年第3期28卷 361-364页

作者：李小侠王育华 Institute of Functional Materials Jiangxi University of Finance & Economics Department of Materials Science School of Physical Science and TechnologyLanzhou University

The single phase of BaGd1-xTbxB9O16(0.05≤x≤0.3) was prepared by the solid-state *** photoluminescence properties were investigated under vacuum ultraviolet(VUV) *** by 541 nm emission,the excitation spectrum of BaGd0.75Tb0.25B9O16 consisted of one broad band centered at about 148 nm and some bands in 163 to 282 *** former was assigned to the overlapped absorptions among borate groups,charge transfer bands(CTBs) of O2-→Ln3+(Ln=Tb,Gd) and the f→d transition of Gd3+.The bands in ...

关键词： phosphor photoluminescence VUV rare earths

Hybridizing artificial bee colony with biogeography-based optimization for constrained mechanical design problems

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Journal of Central South university 2015年第6期22卷 2250-2259页

作者：蔡绍洪龙文焦建军 Guizhou Key Laboratory of economics System Simulation Guizhou University of Finance & Economics School of Mathematics and Statistics Guizhou University of Finance & Economics

A novel hybrid algorithm named ABC-BBO, which integrates artificial bee colony(ABC) algorithm with biogeography-based optimization(BBO) algorithm, is proposed to solve constrained mechanical design problems. ABC-BBO combined the exploration of ABC algorithm with the exploitation of BBO algorithm effectively, and hence it can generate the promising candidate individuals. The proposed hybrid algorithm speeds up the convergence and improves the algorithm's performance. Several benchmark test functions and mechanical design problems are applied to verifying the effects of these improvements and it is demonstrated that the performance of this proposed ABC-BBO is superior to or at least highly competitive with other population-based optimization approaches.

关键词： artificial bee colony biogeography-based optimization constrained optimization mechanical design problem

Adaptive quantile regression with precise risk bounds

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Science China Mathematics 2017年第5期60卷 875-896页

作者： TIAN MaoZai CHAN Ngai Hang School of Statistics Lanzhou University of Finance and Economics School of Statistics and Information Xinjiang University of Finance and Economics Center for Applied Statistics School of StatisticsRenmin University of China Department of Statistics The Chinese University of Hong Kong

An adaptive local smoothing method for nonpaxametric conditional quantile regression models is considered in this paper. Theoretical properties of the procedure are examined. The proposed method is fully adaptive in the sense that no prior information about the structure of the model is assumed. The fully adaptive feature not only allows varying bandwidths to accommodate jumps or instantaneous slope changes, but also al- lows the algorithm to be spatially adaptive. Under general conditions, precise risk bounds for homogeneous and heterogeneous cases of the underlying conditional quantile curves are established. An automatic selection algo- rithm for locally adaptive bandwidths is also given, which is applicable to higher dimensional cases. Simulation studies and data analysis confirm that the proposed methodology works well.

关键词： adaptive smoothing automatic bandwidths conditional quantile risk bounds robustness

Semi-parametric estimation for the Box-Cox transformation model with partially linear structure

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Science China Mathematics 2013年第3期56卷 459-481页

作者： ZHOU GuoLiang ZHOU YaHong Institute of Accounting and finance Shanghai University of Finance and Economics School of economics Shanghai University of Finance and Economics

The Box-Cox transformation model has been widely used in applied econometrics, positive accounting, positive finance and statistics. There is a large literature on Box-Cox transformation model with linear structure. However, there is seldom seen on the discussion for such a model with partially linear structure. Considering the importance of the partially linear model, in this paper, a relatively simple semi-parametric estimation procedure is proposed for the Box-Cox transformation model without presuming the linear functional form and without specifying any parametric form of the disturbance, which largely reduces the risk of model misspecification. We show that the proposed estimator is consistent and asymptotically normally distributed. Its covariance matrix is also in a closed form, which can be easily estimated. Finally, a simulation study is conducted to see the finite sample performance of our estimator.

关键词： Box-Cox transformation model semiparametric estimation rank condition smoothed kernel