We derive the limiting process of stochastic dominance statistics for risk averters as well seekers when underlying processes are dependent or independent. take account dependency partitions and propose a bootstrap method to decide critical point. In addition, we illustrate applicability both analyse relationship between Chinese US stock markets in entire period sub-periods before after crises, including internet bubble recent sub-prime crisis. The findings could be used draw inferences on...

This study analyzes data from 12 prefecture-level cities in the Inner Mongolia Autonomous Region 2011 to 2022 investigate how digital financial inclusion(DFI) affects increase farmers' incomes and its spatial spillover effects. The Dagum Gini coefficient indicates that disparities DFI development are primarily due inter-regional differences. Using Spatial Durbin Model, based on an economic distance matrix, finds strongly promotes income growth for farmers. Moreover, it reveals effects of...

Collaborative filtering (CF) has been widely used in recommender systems to generate personalized recommendations. However, using CF are vulnerable shilling attacks, which attackers inject fake profiles manipulate recommendation results. Thus, attacks pose a threat the credibility of systems. Previous studies mainly derive features from characteristics item ratings user detect attackers, but methods suffer low accuracy when adopt new rating patterns. To overcome this drawback, we properties...

Abstract This paper proposes two variants of a simple but efficient algorithm for structure‐preserving halftoning. Our extends Floyd‐Steinberg error diffusion; the goal our extension is not only to produce good tone similarity also preserve structure and especially contrast, motivated by intuition that human perception sensitive contrast. By enhancing contrast we attempt enhance also. basic employs an adaptive, contrast‐aware mask. To darker pixels should be more likely chosen as black while...

By using the data from Chinese listed companies in Shanghai and Shenzhen A-share market for period 2007 to 2019 Report on Work of Government , this paper investigates impact local government’s economic growth target constraints enterprise technological innovation its mechanism. It is found that significantly inhibit innovation, which more obvious samples SOEs, regulated industries, enterprises at low marketization levels. The change government officials’ performance appraisal indicators...

Content targeted advertising has been a successful way of delivering ads, as effective technologies were developed to find keywords from the webpage user is browsing. However, existing cannot be easily applied online broadcasting content, which usually contain more specific phrases and wordings in certain communities than general content. In this paper, motivated by some research works on information extraction field, we suggest sequential pattern mining-based method discover language...

The interlocking director network can not only help achieve low-cost information sharing and exchange learning among enterprises, but also provide essential resource support for corporate risk-taking behavior. This study aims to empirically analyze the impact, mechanism of action, boundary influence (NET) on (RISK) using data Chinese A-share listed companies from 2007 2020.The results show: (1) There is a significant positive correlation between NET RISK, above are still established after...

The portfolio problem for high dimensional data when the dimension and size are both large is considered. traditional Markowitz mean-variance (MV) by matrix theory analyzed, it found that spectral distribution of sample covariance main factor to make expected return MV overestimate theoretical portfolio. Therefore, a new spectrally corrected method introduced correct elements spectrally-corrected covariance, which corresponding risk provided naturally. Moreover, limiting behavior on deduced...

False information is always produced after the outbreak of major emergencies. Taking this into consideration, paper discusses behavior multiple parties in relation to false dissemination First, a game model constructed, using relevant knowledge evolutionary theory, between three parties: regulatory institutions, opinion leaders, and ordinary Internet users. Second, equations are solved, stability strategies each party under different circumstances analyzed. Third, numerical simulation...

New oscillation criteria are established for the second‐order nonlinear neutral functional differential equations of form , t ≥ 0 where z ( ) = x + p τ )), ∈ C 1 ([ ∞ ), [0, ∞)), and α 1. Our results improve extend some known in literature. Some examples also provided to show importance these results.

Equipment manufacturing industry is the core of national economy. The development artificial intelligence technology provides new opportunities for transformation and upgrading equipment industry, but in this process, China’s enterprises are faced with serious financing constraints efficiency needs to be improved. Based on panel data Listed Companies from 2009 2018, article constructs a regression model by using stochastic frontier analysis measure study its influencing factors. results show...

To study the propagation pattern of congestion risk in traffic network and enhance control capabilities, a model has been developed. This takes into account probabilities five threats (the occurrence probability; loss; unpredictability risk; uncontrollability transferability risk) to define entropy determine capacity, analyze mechanism propagation, explore impact resistance, average degree capacity at intersections, correlation on propagation. Further, method for is proposed. Numerical...

We discuss nonlinear characteristics of surface and bulk magnetic polaritons in the AF/NM superlattices composed antiferromagnetic linear nonmagnetic layers. The results obtained for modes show unreciprocity $\ensuremath{\omega}(\mathbf{k})\ensuremath{\ne}\ensuremath{\omega}(\ensuremath{-}\mathbf{k})$, existence attenuation or gain that indicates unstable. dispersion relations polariton uncover clearly there is a series eigenmodes, corresponding to mode. appearance solitons may be possible...

This article takes frequent online collective behaviour in the context of outbreak 2019 Novel Coronavirus as its research background. Under perspective game theory, based on Evolutionary Game Model and with improvement model's original parameter well introduction a new parameter, i.e. degree psychological identity netizens have opinion leaders, this constructs an evolutionary model between leaders netizens, applies numerical simulation to MATLAB for further analysis. It is found that...

To further study the issue of false information classification on social platforms after major emergencies, this regards opinion leaders and Internet users as a false-information system constructs three differential game models decentralized, centralized, subsidized decision-making based optimal control theory. Comparison analyses numerical simulations equilibrium strategies benefit between users, trajectory steady-state value total volume real information, clarification are carried out. It...

Emotion plays an important role in decision making. In emergency, panic can spread among crowds through person-to-person communications and cause harmful effects on society. The aim of this paper is to propose a new theoretical model the context epidemiology describe under emergency. First, according divisions personality psychology, groups are divided into level-headed group impatient group. Second, individuals two have unique personalities. Thus, only infects within group, while considers...

In emergencies, the transmission of false and uncertain information from individual to causes group panic, which in turn leads spread negative emotions group. To explore process panic spreading groups, an improved panic-spreading model is constructed this study. First, groups are divided into impatient level-headed group, based on theory personality traits psychology. Second, logistic used express growth number susceptible individuals subject emergencies. Third, delay effect can have...