Feature network-driven quadrant mapping for summarizing customer reviews

With the rapid growth of e-commerce, customers increasingly write online reviews of the product they purchase. These customer reviews are one of the most valuable sources of information affecting selection of products or services. Summarizing these customer reviews is becoming an interesting area of research, inspiring researchers to develop a more condensed, concise summarization for users. However, most of the current efforts at summarization are based on general product features without feature’s relationship. As a result, these summaries either ignore feedback from customers or do a poor job of reflecting the opinions expressed in customer reviews. To remedy this summarization shortcoming, we propose a feature network-driven quadrant mapping that captures and incorporates opinions from customer reviews. Our focus is on construction of a feature network, which is based on co-occurrence and sematic similarities, and a quadrant display showing the opinions polarity of feature groups. Moreover, the proposed approach involves clustering similar product features, and thus, it is different from standard text summarization based on abstraction and extraction. The summarized results can help customers better understand the overall opinions about a product.     

Tracking controller for robot manipulators via composite nonlinear feedback law

A composite nonlinear feedback tracking controller for motion control of robot manipulators is de-scribed. The structure of the controller is composed of a composite nonlinear feedback law plus full robot nonlinear dynamics compensation. The stability is carried out in the presence of friction. The controller takes advantage of varying damping ratios induced by the composite nonlinear feedback control, so the transient performance of the closed-loop is remarkably improved. Simulation results demonstrate the feasibility of the proposed method.     

动物体形结构的对称性

首先对两个具体的物理系统进行分析，揭示了结构对称与能量最小之间的关系，在此基础上分析和解释了动物体形结构的对称性。并认为动物体形结构的对称性是由最小能量原理决定的。     

建立有效的企业科技投入系统

建立完善的企业科技投入系统，能够促进企业的发展。重点从企业、政策引导与约束方面提出了建立企业科技投入系统的措施。     

企业兼并的动机及其社会福利理论模型综述

从水平兼并和垂直兼并两个方面详细论述了企业兼并的动机及其社会福利理论模型研究发展状况 ,并对未来的研究方向提出了若干建议.     

Optimal purchasing process for electricity and renewable energy credits with price and demand uncertainty

This paper optimizes the electricity and renewable energy credit (REC) purchasing process for energy distribution. Electricity is traded in deregulated time-sequential markets at fluctuating prices. Optimal electricity purchasing under price and demand uncertainty is a challenging task for electricity distributors, and the recently implemented renewable portfolio standards (RPS) further complicate the purchasing process. Government regulatory decisions concerning the RPS require distributors to purchase corresponding certificates, namely RECs, equivalent to a certain percentage of their electricity sales. This paper formulates and optimizes the joint purchasing process for electricity and RECs. It also analyzes the effect of RPS policy on electricity distributors.     

Analysis for gene networks based on logic relationships

The reverse construction and analysis of the networks of molecular interactions are essential for understanding their functions within cells. In this paper, a logic network model is constructed to investigate the complicated regulation mechanism of shoot genes of Arabidopsis Thaliana in response to stimuli. The dynamics of the complicated logic network is analyzed, discussed, and simulated. The simulation results show that the logic network of the active genes of shoot eventually evolves into eleven attractors under the stimuli, including five 1-periodic and six 2-periodic attractors. Our work provides valuable reference and guidance for biologists to understand and explain Arabidopsis’ response to external stimuli by experiments.     

集成人机交互仿真系统研制与应用

基于虚拟现实技术和人机工程学原理,综合应用多通道宽屏投影拼接、光学运动跟踪和数据手套手势跟踪、Vega和Creator等许多虚拟现实软、硬件技术,构造出一个可供人与计算机中的虚拟操控系统进行实时交互的虚拟仿真环境,可对人机交互绩效进行动态、客观的测量,继而评价操控面板系统的设计质量,亦可用于各类二维操控面板的操作培训。初步实验结果验证了系统的可行性。     

国际油价冲击对汇率体系稳定性影响的研究综述与展望

油价冲击对汇率体系稳定性的影响是国际金融领域研究的重要课题,本文系统梳理和评价了国际汇率制度中间化倾向发展对油价冲击传导的非对称性和传导强度差异化影响的文献,市场风险的信息传导和汇率波动非线性化现象研究的最新成果. 在文献研究基础上,本文指出油价冲击对汇率体系稳定性影响的未来研究的突破口是：不同汇率制度安排缓冲油价冲击的内在规律、 油价冲击影响汇率的传导模式和强度、油价冲击和汇率的非线性研究范式.     

面向物联网的语义空间资源索引构建及其查询优化算法

面对物联网中的海量空间资源,在空间资源索引的构建中引入语义分类的方法,使得传统的IR树具备语义特征,支持用户对资源的语义查询,并提出一种top-k语义查询优化算法,通过对实际数据的使用和实验分析,得出索引结构的有效性和查询结果的正确性,从索引构建时间、查询时间和查询准确率3个指标来评估算法的性能,实验结果表明,算法支持语义空间资源索引构建,并且查询性能好,准确率高。