基于区间数多属性决策的老年人APP用户体验评价研究

为评价老年人在使用移动APP过程中的用户体验,提出基于区间数多属性决策的老年人APP用户体验评价方法。首先,构建老年人APP用户体验评价指标体系,采用区间层次分析法对老年人APP用户体验评价指标的权重进行分析,并对所得的权重值进行修正;其次,进行老年人APP用户体验评价试验,通过用户体验问卷获取老年人APP在各用户体验评价指标下的区间数评分;再次,通过区间数灰色绝对关联分析进行老年人APP方案的综合评价,得出各方案的区间数灰色绝对关联度;最后,进行结果分析,总结老年人APP用户体验的设计原则。以移动医疗APP为例进行研究,结果证实了所提出的方法的有效性,利用区间数进行评价可以充分考虑老年人评价过程中的不确定性,对老年人移动APP的用户体验做出有效评估。     

基于熵权和灰关联的老年人信息终端界面布局评价研究

目的 为了优化现有信息终端界面设计,提升老年用户的体验。方法 首先运用基本用例对信息终端的任务过程进行描述;接着以老年人自身需求为出发点,从结构、任务、认知3个层面构建老年人信息终端界面布局评价体系;其次通过设计调研制作出实验样本,邀请老年人进行界面布局评价实验;然后根据评价实验结果,采用熵权法对评价体系中每个评价指标进行权重分配;最后结合灰色关联分析法将实验结果转化为灰色关联度,通过比较灰色关联度的大小,从而确定最优方案。以银行ATM机作为研究案例,结果表明所提出的方法具有较高适用性。结论 通过基于熵权法和灰色关联分析法的信息终端界面布局评价模型,可以量化老年人的用户偏好,有效地对老年人信息终端界面布局进行评价,对界面布局优化有一定指导意义。     

基于多层次灰色关联法的污水厂选址决策模型

针对目前城市污水处理厂厂址选择中存在着较大的主观性和不确定性,以及影响因素的多指标、多层次的特点。将灰色关联分析法与层次分析法相结合,运用层次分析法确定评价指标权值,以各方案的综合灰色关联度作为评判准则,建立了厂址选择方案的层次分析灰色关联度耦合模型。将其运用于重庆市奉节公平镇污水处理厂厂址的选择,结果表明该方法克服了传统选址方法的缺点,是一种切实可行的选址决策方法。     

基于灰关联分析的器物纹样关联性传承设计方法

目的 为解决纹样创新对原文物文化内涵继承性的问题,从文物内涵与设计对象关联性角度出发,提出一种解决传统文物与设计因子之间关联性的设计方法。探析传统器物纹样提取与再设计的应用研究思路。方法 首先以文物风格意象为基础,明确风格意象评价指标,并将其作为参考序列。依据CGM(Conceptual Generative Model)模型对设计因子进行转化,构建出一级基元、二级基元、子图案的层次表达模型。通过灰色关联分析法对设计因子与文物之间进行关联性分析,利用Matlab计算出各个设计因子与原文物的关联度,根据关联度大小排序对各个设计因子进行重要性分析,从而得到一批既符合现代审美又继承传统文物特色的设计因子。最后,根据图案气质将其应用在适合的产品载体上。结果 以清康熙斗彩璎珞纹贲巴壶为例,验证了设计因子与文物之间的关联性。结论 实现了传统纹样的传承与创新,在一定程度上满足了现代审美需求。     

基于时间维度的整体用户体验设计研究

目的探索具有流式体验特征的整体用户体验生成机制,为交互界面设计实践提供参考。方法依据杜威的"一个体验"理论,将体验解构为情感体验、意义体验、审美体验和功效体验4个层面。在时间维度上,用户和产品(服务或系统)之间的关系可以划分为3个不同阶段,体验的4个层面在不同阶段的表现有所不同,它们彼此关联,相互作用,基于事件共同形成整体用户体验。结论体验本质是高度复杂的,整体用户体验的生成是以时间序列上的交互事件为基础,整合4个体验层面而实现的。最后,以ATM(BBVAIDEO)自动柜员机的用户体验设计为例,进一步阐明了设计实践中整体用户体验生成需要关注的相关议题。     

基于灰色 Elman 神经网络的爆破飞石距离预测研究

针对单一神经网络预测方法存在一些不足,将建立灰色关联分析法与 Elman 神经网络的耦合模型,对爆破飞石最大飞散距离进行预测研究。首先,利用灰色关联分析方法对数据进行预处理,确定各影响因素与爆破飞石距离之间的关联度;然后,根据关联度的大小,选择关联度较大的影响因素作为 Elman 神经网络的输入层数据;最后,用神经网络的功能对数据进行训练和预测。研究结果表明：利用灰色关联分析方法确定主要影响因素作为输入层,比单一使用 Elman 神经网络的预测精度更高,达到95％以上。     

体验视角下南京老地名的O2O产品设计研究

目的研究体验视角下南京老地名O2O模式的产品设计流程和方法,为移动互联网时代的非物质文化遗产创新型产品开发提供设计思路。方法针对南京老地名、O2O模式、体验设计分别进行解构分析,以体验设计要素为突破口,从显性要素与隐性要素的维度提出了体验视角下南京老地名的O2O产品设计方法和流程,并以著名老地名夫子庙为例进行设计实践,验证该方法的有效性。结论分析南京老地名的O2O产品,得出相关设计理念,并以体验设计要素的关联构建南京老地名O2O产品设计系统,为互联网时代的文创产品设计实践提供参考。     

基于灰色关联分析法的线切割机床模块化设计评价研究

目的 为了客观地评价线切割机床外观设计的设计重点,提升实际操作的满意度、操作效率而展开研究。方法 采用灰色关联分析法（GRA）,通过一系列的设计调研、研究分析线切割机床的设计特点和操作存在的问题,得出机床功能模块区域的评价指标,并对各指标进行灰色关联度的定量计算和排序,从而找出机床外观设计的重点功能区域为人机交互的操控区域,在此基础上对操控区域进行重新规划和设计,同时也对机床的其他功能模块区域进行优化设计。最后利用灰色关联系数求得各评价指标的权重,通过模糊综合评价法（FCE）对最终的设计效果进行满意度评价。结论 采用模块化设计评价方法对机床进行设计,优化和重新设计的功能模块区域,可以提高用户体验的整体满意度,能有效解决在实际操作过程中的问题,为线切割机床的外观设计提供客观的数据支撑与参考。     

B2C电商平台的用户体验评价

运用粗糙集属性约简算法对电商平台用户体验评价指标进行初始筛选,采用粗糙集理论得到各个评价指标的评价权重,再通过构建基于灰色关联分析的评价模型进行实证分析,结果显示本文方法具有可行性,有助于提高用户体验综合评价的准确性,并对电商平台企业提升用户体验实际工作具有参考意义。     

基于表情识别技术的用户研究方法

目的为了以更加客观的方式评估用户体验,拓展用户研究的途径,引入表情识别技术对已有用户研究方法进行优化与探索。方法以阅读APP为研究载体,以表情识别与卷积神经网络算法为技术手段,通过设计人机交互实验将其应用于用户研究过程中,建立用户面部表情与用户主观满意度的映射关系。结果针对阅读APP"X",开展了基于表情识别技术和传统问卷访谈的双向设计研究,并采用对比验证的方法得出了基于表情识别技术的用户满意度客观度量方法的有效性和可行性,进而挖掘了基于表情识别方法的用户研究优势。结论基于表情识别技术的用户研究方法在产品交互设计中具有一定的通用性。通过识别分析用户与产品进行人机交互时的面部表情动态变化,可以使用户体验评估更加客观并容易解读,准确定位产品交互体验问题,为设计领域中的用户研究和认识提供了新思路,同时也为表情识别技术与产品设计的交叉融合提供了理论和实践意义的参考。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior

The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.