Products Ranking Through Aspect-Based Sentiment Analysis of Online Heterogeneous Reviews

With the rapid growth of online shopping platforms, more and more customers intend to share their shopping experience and product reviews on the Internet. Both large quantity and various forms of online reviews bring difficulties for potential consumers to summary all the heterogenous reviews for reference. This paper proposes a new ranking method through online reviews based on different aspects of the alternative products, which combines both objective and subjective sentiment values. Firstly, weights of these aspects are determined with LDA topic model to calculate the objective sentiment value of the product. During this process, the realistic meaning of each aspect is also summarized. Then, consumers’ personalized preferences are taken into consideration while calculating total scores of alternative products. Meanwhile, comparative superiority between every two products also contributes to their final scores. Therefore, a directed graph model is constructed and the final score of each product is computed by improved PageRank algorithm. Finally, a case study is given to illustrate the feasibility and effectiveness of the proposed method. The result demonstrates that while considering only objective sentiment values of the product, the ranking result obtained by our proposed method has a strong correlation with the actual sales orders. On the other hand, if consumers express subjective preferences towards a certain aspect, the final ranking is also consistent with the actual performance of alternative products. It provides a new research idea for online customer review mining and personalized recommendation.     

河南省产业转移的创新响应区际差异研究

以产业转移的创新响应系数作为测度产业转移创新响应强度的变量指标,根据标准差和变异系数、相对发展率(Nich)以及离差(Di)和比率(Gi)等方法分析了河南省产业转移创新响应强度的区际差异及其影响因素。结果发现:(1)2007—2015年河南省产业转移的创新响应强度呈现不断增大的态势并呈现出阶段变化的特征。(2)河南省产业转移的创新响应强度从静态格局和动态变化上都呈现出明显的时空差异性,并根据各市的区域特点及产业转移的创新响应强度将河南省18个地市划分为强、较强、中等、较弱以及弱等5种区域类型;(3)创新能力、人才密集度、科技投入对产业转移的创新效应作用较大,技术市场需求和信息化作用相对较小。     

基于电刺激的多模式康复系统设计和研究

针对脑卒中后肢体功能障碍、褥疮及疼痛,分析了临床上常用的治疗参数,设计了多模式电刺激治疗系统。该系统通过触摸屏与主芯片STM32L152RCT6进行通信,控制升压和极性转换电路产生幅值、频率及脉宽均可连续调节的双极性电刺激脉冲,验证了系统的稳定性和镇痛的效果。通过试验验证了系统能稳定工作,且电脉冲幅值与电阻值的变化无关,且能提高受试者的疼痛阈值。能产生临床使用的电刺激疗法的各类参数,有利于临床实验和相关科研的开展。电刺激技术能够缓解人体疼痛,提高疼痛阈值。     

浅析非智力因素对高职学生学业成绩的影响

目的研究非智力因素对高职学生学业成绩的影响。方法利用文献资料研究与实地调查相结合的方法进行研究总结,通过分析高职学生非智力因素的现状以及非智力因素的作用以达到上述目的。结果非智力因素具有动力、定向、引导、维持、调节和强化的作用;学生的动机、兴趣、情感、性格、意志等是影响学生学业成绩的几个非智力因素。结论体育教育则是培养学生良好的非智力因素的有效途径之一。     

基于多模型广义预测控制器的DRTO双层结构

针对动态实时优化(DRTO)与模型预测控制器(MPC)结合的双层结构中由于DRTO与MPC的模型不一致影响优化效果的问题,本文将多模型广义预测控制器(GPC)引入到DRTO双层结构中,设计了基于DRTO双层结构的多模型GPC控制器。上层结构为DRTO层主要解决经济目标函数的优化问题,采用动态过程模型实时优化更新输出对象的最优设定值轨迹。下层结构采用多模型GPC控制器替代原先的单模型MPC控制器,主要是抑制过程中的快速干扰追踪DRTO层得到的最优设定值轨迹。多模型GPC控制器采用多个固定模型和自适应模型来并行辨识系统的动态特性,减小由于上下层模型不一致造成的误差的同时可以提高系统暂态性能和模型参数跳变时系统的调节能力,最后通过仿真验证了该方法的可行性和有效性。     

基于电流转移法的直流断路器灭弧方案仿真

灭弧问题是直流断路器需要解决的难题之一。在对比分析了四种典型的直流断路器灭弧方案的基础上,得出了"电流转移法具有其他方法无法比拟的优点"结论,并结合案例对采用电流转移法的直流断路器系统进行等效理论分析,基于Matlab建立仿真模型。仿真结果表明,基于电流转移法的直流断路器能够产生电流人工过零点,且具有较好的灭弧效果。     

对太原地区提高小电厂发电计划执行率的探讨

小电厂发电管理是电力调度部门的一项重要任务,是电力系统实现管理现代化的重要手段。其目的就是优化电力资源配置,节约能源和提高资源利用率,确保电网安全稳定运行。     

Nonextensivity and the <Emphasis Type="Italic">q</Emphasis>-distribution of a relativistic gas under an external electromagnetic field

We investigate the nonextensivity and the q-distribution of a relativistic gas under an external electromagnetic field. We derive an expression for the nonextensive parameter q based on the relativistic generalized Boltzmann equation, the relativistic q-H theorem and the relativistic version of the q-power-law distribution function in the nonextensive q-kinetic theory. We thus provide the connection between the parameter q≠1 and the spatial-temporal derivatives of the temperature field of the gas as well as the four-potential, and thereby present a clearly physical meaning for the nonextensivity for the relativistic gas.     

深化运筹学教学改革,促进应用能力培养

针对目前本科院校运筹学教学中普遍存在的问题,分析了运筹学课程特点以及深化课程教学改革的重要性,并从培养学生应用能力出发,对教师自身改革、课堂教学模式、辅助教学、考核方式等方面进行了探讨,提出了运筹学课程教学改革的具体思路和方法。