Cloud-based big data analytics for customer insight-driven design innovation in SMEs

Fast development of IT and ICT facilitate customers to post a large volume of their concerns and expectation online, which are widely accepted to be a valuable resource for product designers. However, it is found that only a small number of small and medium-sized enterprises (SMEs) have capabilities to leverage customer online insights for design innovation, which often demonstrate a significant share in national economies growth. To discover the beneath reasons regarding the barrier that prevent them to make effective utilization, in this study, as a concrete example, manufacturing SMEs in the South Wales and Greater Manchester industrial areas of the UK are focused and their potential motivations for using and knowledge of big data-based customer analytics are investigated. An exploratory survey was conducted in terms of the type of customer data they have, the storage approaches, the volume of customer data, etc. Next, a carefully devised exploratory study was undertaken to understand how SMEs perceive the relations between customer data and product design, how about their expectations from big customer data analytics and what really challenges SMEs to exploit the value of big customer data. Besides, a demonstration platform is developed to present SMEs an automatic process of analysing customer online reviews and the capacity on customer insights acquisition and strategic decision making. Finally, findings from two focus groups indicate the different managerial and technical considerations required for SMEs considering implementing big data and customer analytics. This study encourages SMEs to welcome big customer data and suggests that a cloud-based approach may be the most appropriate way of giving access to big data analytics techniques.     

概率论与数理统计课程的教学改革——以创新创业教育为导向

在大众创业、万众创新的背景下,创新创业教育是高校教学改革的突破口。案例教学法是将理论与实践相结合的重要教学方法,对培养创新型人才有积极意义。文章以创新创业教育为导向,应用案例教学法开展概率论与数理统计课程的教学实践。通过深入分析概率论与数理统计课程的教学现状,探讨案例教学法的教学优势,提出教学改革思路——建立完整的案例库、理论与实践并重,在教学实践中取得了良好的教学效果。     

基于多系数保角变换法的船舶垂荡纵摇运动仿真

为给航海模拟器建立实用可靠的船舶在波浪中运动的数学模型,基于二维线性势流理论,采用多系数保角变换法对每个船舶横剖面进行高精度拟合,计算各个横剖面的水动力系数和波浪激励力,利用Visual Studio自主开发出船舶在规则波中的纵向运动数值模拟程序。为验证这个数值模拟程序的可靠性,对S175集装箱船在迎浪中运动的幅值响应因子(response amplitude operator, RAO)进行数值计算。结果表明:当弗劳德数为0.275时,RAO计算结果在大部分频率范围内与试验结果吻合良好。因此,这个数值模拟程序能准确地对船舶在波浪中的运动时历进行仿真。     

淡水生态系统中的复杂性问题

淡水生态系统中的复杂性问题 ,可由水体类型的复杂性 ,水体形成的复杂性 ,水生生物的多样性 ,以及生态系统结构、功能的复杂性和格局、过程的复杂性 ,流域影响的复杂性 ,人类干扰的复杂性等构成 .简要介绍了中国淡水生态学研究的某些进展与动态 ,并针对淡水生态学研究所面临的主要问题———湖泊富营养化和蓝藻水华上暴发的相关研究作了介绍 ;结合国际生态学研究的最新动态 ,还探讨了淡水生态学研究可能的发展方向 .淡水生态系统复杂性研究可能取得的进展有如下几个方面 :RCC (rivercontinuumconcept河流连续统 )理论 ,以IBI (indexforbi oticintegrity生物完整性指数 )和IWI (indexofwatershedindicators)等为代表的生态系统健康研究 ,scaling(尺度推绎 )与fractal(分形 ) ,生态系统管理与信息系统 ,空间数据分析与异质性 ,数学模型与混沌等     

高速铣削718模具钢的铣削力试验研究

利用TiAlN涂层刀具对718模具钢进行高速铣削试验研究,获得铣削速度v、背吃刀量α_p、进给速度v_f和径向铣削深度α_e对铣削力的影响规律,为合理选择铣削参数提供可靠的依据。同时,在正交试验结果的基础上, 应用多元线性回归分析方法,建立铣削力的回归数学模型,并用R检验和F检验法验证模型的显著性。     

数学思维视角下的电子商务

随着网络技术和电子商务的发展,很多商业贸易活动均通过网络完成.在商业贸易活动中又需要用数学思维的方法来衡量贸易活动的全局,并对贸易活动是否进行做出判断.将数学思维与电子商务相结合,有利于进行网络营销策略的分析和研究,促进电子商务的进一步发展.     

一种内部网络信息安全风险评估模型及技术实现

提出了一种基于ISO/IEC27000的内部网络信息安全风险评估模型,并具体设计了一个内部网络风险评估系统用于实现该模型,对模型在计算机上的实现进行了简要说明,分析了系统的开发模式和实现平台。     

乒乓球单淘汰赛赛制的数学原理与抽签的操作策略

从继承和扬弃乒乓球单淘汰赛赛制传统理论和操作方法的目标出发,对这一赛制的数学原理和抽签的操作策略进行了系统的、多层次探讨.提出了运动员入区约束条件排序、运动员序与入区理想概率对应关系、抽签顺序与运动员类型影响相消长等原则,提出了概率归一、区域差教、"剧场寻座"等规律,并提出了轮空数和机动数的计算公式.认为抽签操作应以"分型抽签"和"逐级入区"作为核心理念,同时,在不同层级入区时,要在保证相关队友合理分开的前提下,最大限度地实现运动员的理想概率或最佳概率.具体而言,在各个相应层级入区时,只可能有3种类型的运动员:同型相关队友、混合型相关队友、落单运动员.针对"同型相关队友",提出在不需机动数的情况下各类型运动员直接随机到底进入相应层级的区;针对"混合型相关队友",提出"红黑不等"布签模式、"一抽一跟"并"抽后不放"的抽签模式;针对落单运动员,应放在这一层级的最后集群抽,提出续用"混合型相关队友"抽签之后的布签形式,采用"抽后不放"的抽签模式.     

数学教育中的数学素质

培养学生怎样的数学素质?怎样来培养这些数学素质?从观念层面考虑,应具备自觉的定量、定量化数学意识。从能力层面考虑,应具备解决问题的数学能力。从思维层面考虑,应具备数学推理能力。从语言层面考虑,应具备运用数学语言进行信息交流的数学能力。从心理层面考虑,应具备良好的数学心理素质。     

Mathematical modelling as a tool to assessment of loads in volleyball player’s shoulder joint during spike

This article deals with kinematic and kinetic conditions in volleyball attack and identifies loads in the shoulder joint. Joint angles and velocities of individual segments of upper limb were measured with the use of the motion capture system XSENS. Muscle forces and loads in skeletal system were calculated by means of mathematical model elaborated in AnyBody system. Spikes performed by players in the best and worst way were compared with each other. The relationships were found between reactions in shoulder joint and flexion/extension, abduction/adduction and rotation angles in the same joint and flexion/extension in the elbow joint. Reactions in shoulder joint varied from 591 N to 2001 N (in relation to body weight [BW] 83–328%).

The analysis proved that hand velocity at the moment of the ball hit (which varied between 6.8 and 13.3 m s^–1) influences on the value of reaction in joints, but positions of individual segments relative to each other are also crucial. It was also proved in objective way, that position of the upper limb during spike can be more or less harmful assuming that bigger reaction increases possibility of injury, what can be an indication for trainers and physiotherapists how to improve injury prevention.