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Coherence,Connectedness,Dynamic Linkages Among Oil and China's Sectoral Commodities with Portfolio Implications

Journal of Systems Science & Complexity 2022年第3期35卷 1052-1097页

作者： CUI Jinxin zou Huiwen School of Economics and Management Fuzhou UniversityFuzhou 350108China

This paper investigates the time-frequency dependence,return and volatility connectedness,dynamic linkages,and portfolio diversification gains among oil and China’s sectoral commodities,namely,Petrochemicals(CIFI),Grains(CRFI),Energy(ENFI),Non-ferrous metals(NFFI),Oil&Fats(OOFI),and Softs(SOFI),utilizing a proposed research framework that contains the wavelet coherence,novel TVP-VAR based connectedness,and the cDCC-,DECO-FIAPARCH(1,d,1)*** empirical results demonstrate that global oil market exhibits a relatively higher(lower)coherence with ENFI,NFFI,and OOFI(CRFI)on the long-term time horizon and the oil market leads China’s sectoral commodities during most sample *** crude oil market transmits significant connectedness to China’s sectoral commodities,especially the energy commodity sector(ENFI).The dynamic return and volatility total spillovers tend to intensify and exhibit significant fluctuations during the GFC and the oil price ***,the time-varying linkages among oil and China’s sectoral commodities are positive and fluctuant,mainly at a relatively low *** dynamic return and volatility connectedness,multi-view linkages,optimal portfolio weights,and hedging ratios display significant time-varying *** oil-commodity nexus offers diversification benefits and the optimal-weighted portfolio presents the best variance and downside risk reduction ***,risk management effectiveness is market-condition-dependent and heterogeneous across different commodity sectors and *** paper can not only help investors and market regulators to capture the complex interconnectedness and risk transmission trajectory among oil and China’s sectoral commodities but also benefits for investors and portfolio managers to construct optimal portfolios and hedging strategies.

关键词： China’s sectoral commodities crude oil portfolio diversifications return and volatility spillovers TVP-VAR connectedness

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Image Fusion Based on Bioinspired Rattlesnake Visual Mechanism Under Lighting Environments of Day and Night Two Levels

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Journal of Bionic Engineering 2024年第3期21卷 1496-1510页

作者： Yong Wang Hongmin zou College of Communication Engineering Jilin UniversityChangchun130012China

This study,grounded in Waxman fusion method,introduces an algorithm for the fusion of visible and infrared images,tailored to a two-level lighting environment,inspired by the mathematical model of the visual receptive field of rattlesnakes and the two-mode cells'*** research presented here is segmented into three *** the first segment,we design a preprocessing module to judge the ambient light intensity and divide the lighting environment into two levels:day and *** second segment proposes two distinct network structures designed specifically for these daytime and nighttime *** the daytime images,where visible light information is predominant,we feed the ON-VIS signal and the IR-enhanced visual signal into the central excitation and surrounding suppression regions of the ON-center receptive field in the B channel,***,for nighttime images where infrared information takes precedence,the ON-IR signal and the Visual-enhanced IR signal are separately input into the central excitation and surrounding suppression regions of the ON-center receptive field in the B *** outcome is a pseudo-color fused *** third segment employs five different no-reference image quality assessment methods to evaluate the quality of thirteen sets of pseudo-color images produced by fusing infrared and visible *** images are then compared with those obtained by six other methods cited in the relevant *** empirical results indicate that this study's outcomes surpass the comparative results in terms of average gradient and spatial *** one or two sets of fused images underperformed in terms of standard deviation and entropy when compared to the control *** sets of fused images did not perform as well as the comparison in the QAB/F *** conclusion,the fused images generated through the proposed method show superior performance in terms of scene detail,visual perception,and image sharpness

关键词： Rattlesnake Visible image Infrared image Daylight Bionic

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A high performance approach for solving the high voltage direct current ion flow field problem by tensor-structured finite element method

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High Voltage 2023年第1期8卷 128-137页

作者： Qiwen Cheng Jun zou Department of Electrical Engineering Tsinghua UniversityBeijingChina

In order to achieve high performance for solving the ion flow field problem,an approach is proposed with the tensor-structured finite element method(FEM)to accelerate the Newton *** Poisson equation and the continuity equation are reformulated into the tensor expressions,*** element level evaluation phase is decomposed into the concatenated tensor contraction operations,which is implemented by the highly optimised arithmetic operation provided in *** contrast to the traditional implemented FEM,the tensor-structured FEM has significantly improved the throughput and achieved high *** accuracy and efficiency of the tensorbased algorithm are verified under the unipolar and bipolar model,*** tensor-based algorithm provides one order of magnitude speedup over the traditional algorithm in the elemental evaluation phase.‘Tensorization’is an efficient way to bridge the algorithm and the hardware.

关键词： tensor element finite

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Trends and Potential of Machine Learning and Deep Learning in Drug Study at Single-Cell Level

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Research 2023年第4期2023卷 145-162页

作者： Ren Qi Quan zou Yangtze Delta Region Institute(Quzhou) University of Electronic Science and Technology of ChinaQuzhou 324000China School of Life Science and Technology University of Electronic Science and Technology of ChinaChengduChina Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengduChina.

Cancer treatments always face challenging problems,particularly drug resistance due to tumor cell *** existing datasets include the relationship between gene expression and drug sensitivities;however,the majority are based on tissue-level *** drugs at the single-cell level are perspective to overcome minimal residual disease caused by subclonal resistant cancer cells retained after initial curative ***,machine learning techniques can help us understand how different types of cells respond to different cancer drugs from the perspective of single-cell gene *** modeling using single-cell data and drug response information will not only improve machine learning for cell-drug outcome prediction but also facilitate the discovery of drugs for specific cancer subgroups and specific cancer *** this paper,we review machine learning and deep learning approaches in drug *** analyzing the application of these methods on cancer cell lines and single-cell data and comparing the technical gap between single-cell sequencing data analysis and single-cell drug sensitivity analysis,we hope to explore the trends and potential of drug research at the single-cell data level and provide more inspiration for drug research at the single-cell *** anticipate that this review will stimulate the innovative use of machine learning methods to address new challenges in precision medicine more broadly.

关键词： drugs expression overcome

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Business Environment and Resource Allocation Based on the Perspective of the National Value Chain

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Journal of Systems Science & Complexity 2023年第1期36卷 294-327页

作者： zou Wei LEI Hao Economics and Management School Wuhan UniversityWuhan 430072China

China is actively upgrading its industrial structure through industries transferring between developed and undeveloped areas;however,the overall level of the national value chain is still not high,and the asymmetric competition pattern between the upstream and the downstream has not been ***,this paper establishes a competitive equilibrium model for the production of manufacturing enterprises,with factor price distortion,under the condition of constant returns to *** authors derive the relative distortion coefficients of each factor price,calculate the misallocation indices of capital and labor,and construct an industry resource misallocation ***,this paper applies the regional value-added decomposition model to calculate the national value chain index and matches the market index of the China Market Index Database with the Chinese Industrial Enterprises Database and the Inter-Regional Input-Output Tables through quantitative *** the perspective of the national value chain,the authors study the improvement effect and mechanism of the business environment on the resource allocation in *** study shows that industry resource allocation will be improved by 17.89%if the business environment level is improved by one standard *** effect is most prevalent in the eastern and central regions,not so much in the west;the effect of downstream industries in the national value chain is higher than that of upstream industries;the improvement effect on capital allocation is higher in downstream industries than in the upstream industries;and the improvement effect on labor misallocation is basically the same in both the upstream and the *** with labor intensive industries,capital intensive industries are more influenced by the national value chain,while the effect of upstream industries is *** the same time,it is well documented that participation in the global value chain can improve the efficienc

关键词： Business environment national value chain resource misallocation

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Asymptotical Behavior of Bipolar Non-Isentropic Compressible Navier-Stokes-Poisson System

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Acta Mathematicae Applicatae Sinica 2016年第4期32卷 813-832页

作者： Chen zou Department of Mechanics and Aerospace Engineering COEPeking University

Abstract The bipolar non-isentropic compressible Navier-Stokes-Poisson （BNSP） system is investigated in R3 in the present paper, and the optimal L2 time decay rate for the global classical solution is established. It is shown that the total densities, total momenta and total temperatures of two carriers converge to the equilibrium states at the rate （1 ＋ t）-3/4＋εin L2-norm for any small and fix ε 〉 0. But, both the difference of densities and the difference of temperatures of two carriers decay at the optimal rate （1 ＋ t）- 3/4, and the difference of momenta decays at the optimal rate （1 ＋t）- 1/4. This phenomenon on the charge transport shows the essential difference between the non-isentropic unipolar NSP and the bipolar NSP system.

关键词： non-isentropic bipolar Navier-Stokes-Poisson system optimal time decay rate

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A Machine Learning Method for Differentiating and Predicting Human-Infective Coronavirus Based on Physicochemical Features and Composition of the Spike Protein

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Chinese Journal of Electronics 2021年第5期30卷 815-823页

作者： WANG Chao zou Quan Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Hainan Key Laboratory for Computational Science and Application Hainan Normal University

Several Coronaviruses(CoVs) are epidemic pathogens that cause severe respiratory syndrome and are associated with significant morbidity and mortality. In this paper, a machine learning method was developed for predicting the risk of human infection posed by CoVs as an early warning system. The proposed Spike-SVM(Support vector machine) model achieved an accuracy of 97.36% for Human-infective CoV(HCoV) and Nonhuman-infective CoV(Non-HCoV) classification. The top informative features that discriminate HCoVs and Non-HCoVs were identified. Spike-SVM is anticipated to be a useful bioinformatics tool for predicting the infection risk posed by CoVs to humans.

关键词： Spike protein NonHCoVs genetics microorganisms Support vector machine mortality Spike-SVM model Human-infective CoV severe respiratory syndrome machine learning method biology computing predicting Human-infective coronavirus diseases proteins HCoV human infection differentiating Nonhuman-infective CoV infection risk CoVs discriminate HCoVs learning (artificial intelligence) bioinformatics support vector machines informative features significant morbidity molecular biophysics early warning system epidemic pathogens Coronaviruses

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LIMITATION OF AVERAGE ESHELBY TENSOR AND ITS APPLICATION IN ANALYSIS OF ELLIPSE APPROxIMATION

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Acta Mechanica Solida Sinica 2011年第2期24卷 176-184页

作者： Wennan zou Institute for Advanced Study/Institute of Engineering Mechanics Nanchang University Nanchang 330031 China

By the aid of irreducible decomposition, the average Eshelby tensor can be expressed by two complex coefficients in 2D Eshelby problem. This paper proved the limitation of complex coefficients based on the span of elastic strain energy density. More discussions yielded the constraints on the sampling of module and phase difference of complex coefficients. Using this information, we obtained that the maximum relative error is 65.78% after an ellipse approximation. These results, as a supplement to our previous paper, further implied that Eshelby＇s solution for an ellipsoidal inclusion could not be applied to non-ellipsoidal inclusions without taking care.

关键词： arbitrary inclusions Eshelby tensor ellipse approximation elastic strain energy density

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基于卡尔加里-剑桥指南的沙龙培训模式提升全科规培医师医患沟通技能的对照研究

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中国全科医学 2025年第1期28卷 71-76页

作者：彭涛邹川曾欣张焱沈静四川省成都市第五人民医院全科医学科 611130

背景医患沟通技能是全科医生的核心岗位胜任力之一,高水平的医患沟通能力是创建和谐医患关系的基石,有助于提高患者就医获得感和满意度。而我国全科医生沟通能力普遍偏低,有待探索出一种适应我国国情、满足我国全科医生沟通需求的医患... 详细信息

背景医患沟通技能是全科医生的核心岗位胜任力之一,高水平的医患沟通能力是创建和谐医患关系的基石,有助于提高患者就医获得感和满意度。而我国全科医生沟通能力普遍偏低,有待探索出一种适应我国国情、满足我国全科医生沟通需求的医患沟通培训模式来提高其医患沟通能力。目的探索基于卡尔加里-剑桥指南的沙龙培训模式在全科规培医师医患沟通技能培训中的应用效果,为构建适合我国国情的医患沟通培训体系提供参考依据。方法选取成都市第五人民医院2019—2020年度全科规培医师40名作为研究对象,按照随机数字表法分为沙龙组和对照组,每组20名,其中沙龙组使用基于卡尔加里-剑桥指南的沙龙培训模式进行医患沟通培训,对照组设置为空白对照,培训前、培训后1周分别对两组学员采用标准化病人(SP)模式进行接诊,使用医患沟通评价量表(SEGUE量表)进行现场观察评分,比较两组学员的医患沟通培训效果。结果最终纳入28名,其中沙龙组15名,对照组13名,培训后沙龙组规培医师SEGUE量表评分从(11.80±4.36)分提高至(18.07±4.11)分,对照组规培医师SEGUE量表评分从(12.15±4.63)分提高至(14.46±3.71)分。沙龙组培训后的SEGUE量表评分与培训前的比较,差异有统计学意义(t=3.250,P<0.001);对照组培训后的SEGUE量表评分与培训前比较,差异无统计学意义(t=2.582,P=0.624);培训后对SEGUE量表中的25个项目进行分析,沙龙组与对照组SEGUE量表评分比较,差异有统计学意义(P<0.05)。沙龙组以下5个项目结果优于对照组,准备阶段中的“建立个人信任关系”(93.3%比7.7%)、“保护患者的隐私/尊重患者选择权”(53.3%比15.4%);理解患者阶段中的“认同患者为疾病所付出的努力、改变及其遇到的困难”(33.3%比23.1%)、“表达关心,使患者感到温暖/树立信心”(100.0%比69.2%);结束问诊阶段中的“询问患者是否还有其他的问题需要探讨”(66.7%比23.1%)。结论基于卡尔加里-剑桥指南的沙龙培训模式对全科规培医师进行医患沟通技能培训可增强学员主动参加培训的兴趣和积极性,对于医患沟通能力的提升具有较好的培训效果,值得借鉴和推广。

关键词：全科医学全科医师规范化培训医患沟通沟通培训卡尔加里-剑桥指南

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Towards an intelligent photonic system

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Science China(Information Sciences) 2020年第6期63卷 80-96页

作者： Weiwen zou Bowen MA Shaofu xU xiuting zou xingjun WANG State Key Laboratory of Advanced Optical Communication Systems and Networks Intelligent Microwave Lightwave Integration Innovation Center (iMLic) Department of Electronic EngineeringShanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University

The emerging intelligence technologies represented by deep learning have broadened their applications to various fields. Beyond the conventional electronics-based processing systems, the convergence of photonics and artificial intelligence(AI) technology enhances the performance and learning ability of AI. In this review, we propose the concept of an intelligent photonic system(IPS), illustrating it as a developing architecture with three different versions. For each version of IPS, we review several representative *** we discuss the challenges towards an IPS and provide some prospects for the future development.

关键词： intelligent photonic system deep learning artificial intelligence optical neural network neuromorphic photonics

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