Recovering the low-rank structure of data matrix from sparse errors arises in the principal component pursuit （PCP）. This paper exploits the higher-order generalization of matrix recovery, named higher-order princip...Recovering the low-rank structure of data matrix from sparse errors arises in the principal component pursuit （PCP）. This paper exploits the higher-order generalization of matrix recovery, named higher-order principal component pursuit （HOPCP）, since it is critical in multi-way data analysis. Unlike the convexification （nuclear norm） for matrix rank function, the tensorial nuclear norm is stil an open problem. While existing preliminary works on the tensor completion field provide a viable way to indicate the low complexity estimate of tensor, therefore, the paper focuses on the low multi-linear rank tensor and adopt its convex relaxation to formulate the convex optimization model of HOPCP. The paper further propose two algorithms for HOPCP based on alternative minimization scheme： the augmented Lagrangian alternating direction method （ALADM） and its truncated higher-order singular value decomposition （ALADM-THOSVD） version. The former can obtain a high accuracy solution while the latter is more efficient to handle the computationally intractable problems. Experimental results on both synthetic data and real magnetic resonance imaging data show the applicability of our algorithms in high-dimensional tensor data processing.展开更多
大规模电化学储能系统(battery energy storage system,BESS)送出线路发生故障时,受其低电压穿越控制(low voltage ride-through,LVRT)策略的影响,其正序故障分量阻抗特征与传统电源存在较大差异。本文基于BESS相关的技术规定,根据BESS...大规模电化学储能系统(battery energy storage system,BESS)送出线路发生故障时,受其低电压穿越控制(low voltage ride-through,LVRT)策略的影响,其正序故障分量阻抗特征与传统电源存在较大差异。本文基于BESS相关的技术规定,根据BESS故障前后的充放电模式将其工作模式转换方式分为3种,进一步计及BESS的LVRT控制策略,推导出不同工作模式转化方式下其正序故障分量阻抗角的表达式,从而分析了不同影响因素对BESS正序故障分量阻抗角的影响,并据此研究了正序故障分量方向元件在BESS接入场景下的适应性。最后利用Matlab/Simulink仿真平台验证了理论分析的正确性。展开更多
Microsoft Direct X是一个基于COM技术的多媒体应用程序开发工具包.它代表了未来多媒体应用程序的开发方向.详细介绍了COM组件的基本概念和D irect X的构架,包括Direct3D,DirectSound,DirectShow,并在V isual C++6.0环境下用Direct X开...Microsoft Direct X是一个基于COM技术的多媒体应用程序开发工具包.它代表了未来多媒体应用程序的开发方向.详细介绍了COM组件的基本概念和D irect X的构架,包括Direct3D,DirectSound,DirectShow,并在V isual C++6.0环境下用Direct X开发多媒体游戏作为应用实例.展开更多
Effects of nickel component,thiourea,glue and chloride ions and their interactions on the passivation of copper–nickel based alloy scrap anodes were investigated by combining conventional electrochemical techniques.R...Effects of nickel component,thiourea,glue and chloride ions and their interactions on the passivation of copper–nickel based alloy scrap anodes were investigated by combining conventional electrochemical techniques.Results obtained from chronopotentiometry and linear voltammetry curves showed that the Ni component made electrochemical stability of the anode strong and difficult to be corroded,caused by the adsorption of generated Cu2O,NiO or copper powder to the anode surface.The Ni2+reducing Cu2+to Cu+or copper powder aggravated the anode passivation.In a certain range of the glue concentration≤8×10–6 or thiourea concentration≤4×10–6,the increase of glue or thiourea concentration increases the anode passivation time.Over this range,glue and thiourea played an adverse effect.The increase of chloride ions concentration led to the increase in passivation time.展开更多
基金supported by the National Natural Science Foundationof China(51275348)
文摘Recovering the low-rank structure of data matrix from sparse errors arises in the principal component pursuit （PCP）. This paper exploits the higher-order generalization of matrix recovery, named higher-order principal component pursuit （HOPCP）, since it is critical in multi-way data analysis. Unlike the convexification （nuclear norm） for matrix rank function, the tensorial nuclear norm is stil an open problem. While existing preliminary works on the tensor completion field provide a viable way to indicate the low complexity estimate of tensor, therefore, the paper focuses on the low multi-linear rank tensor and adopt its convex relaxation to formulate the convex optimization model of HOPCP. The paper further propose two algorithms for HOPCP based on alternative minimization scheme： the augmented Lagrangian alternating direction method （ALADM） and its truncated higher-order singular value decomposition （ALADM-THOSVD） version. The former can obtain a high accuracy solution while the latter is more efficient to handle the computationally intractable problems. Experimental results on both synthetic data and real magnetic resonance imaging data show the applicability of our algorithms in high-dimensional tensor data processing.
文摘大规模电化学储能系统(battery energy storage system,BESS)送出线路发生故障时,受其低电压穿越控制(low voltage ride-through,LVRT)策略的影响,其正序故障分量阻抗特征与传统电源存在较大差异。本文基于BESS相关的技术规定,根据BESS故障前后的充放电模式将其工作模式转换方式分为3种,进一步计及BESS的LVRT控制策略,推导出不同工作模式转化方式下其正序故障分量阻抗角的表达式,从而分析了不同影响因素对BESS正序故障分量阻抗角的影响,并据此研究了正序故障分量方向元件在BESS接入场景下的适应性。最后利用Matlab/Simulink仿真平台验证了理论分析的正确性。
基金Project(51574135)supported by the National Natural Science Foundation of ChinaProject(KKPT201563022)supported by the Collaborative Innovation Center of Kunming University of Science and Technology,China
文摘Effects of nickel component,thiourea,glue and chloride ions and their interactions on the passivation of copper–nickel based alloy scrap anodes were investigated by combining conventional electrochemical techniques.Results obtained from chronopotentiometry and linear voltammetry curves showed that the Ni component made electrochemical stability of the anode strong and difficult to be corroded,caused by the adsorption of generated Cu2O,NiO or copper powder to the anode surface.The Ni2+reducing Cu2+to Cu+or copper powder aggravated the anode passivation.In a certain range of the glue concentration≤8×10–6 or thiourea concentration≤4×10–6,the increase of glue or thiourea concentration increases the anode passivation time.Over this range,glue and thiourea played an adverse effect.The increase of chloride ions concentration led to the increase in passivation time.
