Analyzing Cavitation Caused by Metal Particles in the Transaxle： Application of High Quality Assurance CAE Analysis Model

This paper focuses on a strategic improving quality of＂high quality assurance CAE （computer aided engineering） analysis model＂ to be used in development design. The authors present a case oftransaxle oil seal leakage in automotive drive trains, a technical reliability problem that generates bottlenecks for auto manufacturers around the world. The application of this model is used to analyze cavitation caused by the metal particles （foreign matter） generated through transaxle wear. This analyzing method primarily uses numerical simulation （CAE） to clarify the technological mechanism generating oil leaks as a result of foreign metallic substances entering oil seals in the drive train. Quality improvement using this CAE analyzing method was verified by successfully applying it to the technological problem of development design bottlenecks at auto manufacturers.

Analysis and Design of Quality Management Platform for the Entire Process of Characteristic Software Talent Training

At the end of 2021 to create a new model of characteristic software talent training for independent and controllable key software fields,the Ministry of Education and the Ministry of Industry and Information Technology jointly approved the establishment of the first batch of 33 Characteristic Pilot Schools of software.As a member of characteristic software schools,the HIT School of Software has been approved and will focus on the construction of 2 characteristic directions,which are large-scale industrial software and industrial professional application software.In order to achieve the goal,it is urgent to develop a comprehensive management platform to control the entire process of talent training,so that we can standardize,modelling,and digitized the entire process of characteristic software talent training.By relating all aspects of student training with and implementing the ability-index mechanisms,we will continuously collect big-data of the entire process of student growth,and generate multidimensional student ability portraits for evaluating the effect of talent training,and adjust as well as optimizing the growth path for students themselves during their studying.Employers will be able to identify talents accurately and provide effective reference for colleges to adjust training plans.This paper will analyze the needs of the platform,provide demand analysis of the platform,extract the correlation model between training,conclude the relations between ability-index activities and ability indicators,and give a reasonable overall system design scheme.

基于Cast Designer的壳体铸件铸造工艺设计及智能优化

使用Cast Designer铸造仿真分析软件,通过可铸性评估系统DFM,完成浇冒系统的辅助设计,然后使用DOE技术和基于遗传算法GA的智能优化技术,评估不同工艺设计方案与铸造过程参数对壳体铸件质量的影响,分析在不同的冒口、冷铁和浇注温度条件下得料率和缩孔量的关系。根据对DOE模拟结果的分析,发现顶冒口和侧冒口尺寸是影响得料率和缩孔量的关键因数,再利用遗传算法GA选择最佳设计方案和参数。通过帕累托曲线得到了生产壳体铸件的最优工艺方案。

Statistical Analysis of Process Monitoring Data for Software Process Improvement and Its Application

Software projects influenced by many human factors generate various risks. In order to develop highly quality software, it is important to respond to these risks reasonably and promptly. In addition, it is not easy for project managers to deal with these risks completely. Therefore, it is essential to manage the process quality by promoting activities of process monitoring and design quality assessment. In this paper, we discuss statistical data analysis for actual project management activities in process monitoring and design quality assessment, and analyze the effects for these software process improvement quantitatively by applying the methods of multivariate analysis. Then, we show how process factors affect the management measures of QCD (Quality, Cost, Delivery) by applying the multiple regression analyses to observed process monitoring data. Further, we quantitatively evaluate the effect by performing design quality assessment based on the principal component analysis and the factor analysis. As a result of analysis, we show that the design quality assessment activities are so effective for software process improvement. Further, based on the result of quantitative project assessment, we discuss the usefulness of process monitoring progress assessment by using a software reliability growth model. This result may enable us to give a useful quantitative measure of product release determination.

Geotechnical investigations and remediation design for failure of tunnel portal section： a case study in northern Turkey

Mass movements are very common problems in the eastern Black Sea region of Turkey due to its climate conditions, geological, and geomorphological characteristics. High slope angle, weathering, dense rainfalls, and anthropogenic impacts are generally reported as the most important triggering factors in the region. Following the portal slope excavations in the entrance section of Cankurtaran tunnel, located in the region, where the highly weathered andesitic tuff crops out, a circular toe failure occurred. The main target of the present study is to investigate the causes and occurrence mechanism of this failure and to determine the feasible remedial measures against it using finite element method(FEM) in four stages. These stages are slope stability analyses for pre-and postexcavation cases, and remediation design assessments for slope and tunnel. The results of the FEM-SSR analyses indicated that the insufficient initial support design and weathering of the andesitic tuffs are the main factors that caused the portal failure. After installing a rock retaining wall with jet grout columns and reinforced slope benching applications, the factor of safety increased from 0.83 to 2.80. In addition toslope stability evaluation, the Rock Mass Rating(RMR), Rock Mass Quality(Q) and New Austrian Tunneling Method(NATM) systems were also utilized as empirical methods to characterize the tunnel ground and to determine the tunnel support design. The performance of the suggested empirical support design, induced stress distributions and deformations were analyzed by means of numerical modelling. Finally, it was concluded that the recommended stabilization technique was essential for the dynamic long-term stability and prevents the effects of failure. Additionally, the FEM method gives useful and reasonably reliable results in evaluating the stability of cut slopes and tunnels excavated both in continuous and discontinuous rock masses.

On the Design of Effective E-Commerce Applications: An ISO-Based Lifecycle Model

The provision of services as e-commodities and the wide use of networked business models have driven buyer experience to new heights. Innovation, coupled with quality is the competitive advantage e-commerce vendors strive to achieve when designing or re-designing their software. In terms of quality, evaluation stood in the spotlight for many years. However, software analysis and design based on quality models have been used mostly for understanding, rather than improving. In this work, we present a new model for the analysis and design of e-commerce software systems mapped to the software life-cycle process. Quality control procedures are mapped to every phase, from initiation and design to delivery. Based on current ISO standards such as ISO25000 series, this work discusses technical and managerial principles that need to be applied in order to obtain quality e-commerce software.

基于Kano模型的列车正性情感体验需求研究

目的遵照“以事实为依据”的设计原则,明确对列车样本展开设计分析的内容与标准,获得准确的体验需求。方法首先基于哈森扎尔在情感体验方面的研究,提出正性品质理论模型及其需求洞察路径,用于分析、提取列车乘客的情感体验需求;其次利用Kano模型对需求进行优先级排序;最后以享誉世界的儿童列车“阿苏男孩号”对方法进行了应用验证。结果获得了22项需求及其优先级排序,总结得出儿童列车体验设计的策略:空间设计优先考虑提供就餐场所,以及针对用户分层做空间分割;设施设计优先考虑亲子互动性;涂装设计优先考虑“列车外壳”;服务设计优先考虑为家长陪伴提供条件。结论该方法可以帮助设计师洞察样本列车的体验需求及其优先级排序,能够为优化列车自身体验与指导同类列车设计提供决策支持。

平行闸板阀阀座孔加工专用车削刀具设计及实验研究

平行闸板阀被广泛应用在石油钻采配套装备中。采用普通内孔车削刀具加工平行闸板阀阀座孔,需要调头加工,难以使用切削液,并且由于刀杆刚度和硬度较小引起“颤抖”现象,加工工件时不易保证阀座孔的加工质量和形位公差。基于此设计了一套专用车削刀具,增大刀杆的刚度和硬度,方便使用切削液,而且仅需一次装夹,避免掉头加工,以满足阀座孔的形位公差和加工质量要求。采用有限元法对所设计刀具进行了强度校核。通过实验验证,所设计的刀具可以提高加工效率,满足加工质量和形位公差精度要求。

浙江省中小学教育质量监测的迭代发展:从健康体检走向实践指导

本文报告了浙江省教育质量监测从“专业支持”到“自主监测”的迭代发展历程,体现出了浙江省教育质量监测从“健康体检”走向“实践指导”的价值导向。文章从构建“学生发展+成长环境”的评价指标框架、基础指标+自主观测点的设计依据这两个方面介绍浙江教育质量监测指标体系的系统设计;从组合分析、模型构建、专题深入和国际比较四个方面介绍浙江在专题分析方面的创新思路;从揭示学生成长机制、聚焦学习品质及影响机制、透视学业负担的实质、推动学校教学管理转型、改善家庭“软环境”五个方面阐述浙江教育质量监测的结论、发现及相关实践指导,体现了浙江教育质量监测的实践透视能力、基层发展立场与实践指导取向。

基于需求-功能-结构关系矩阵的导弹模块划分方法

模块化导弹能够利用分系统的灵活装配快速形成典型作战单元以适应复杂多样化的作战任务,是未来导弹武器系统的重要发展方向之一。针对传统的导弹模块划分方法无法充分发挥导弹模块化特性带来的架构优势问题,提出一种基于需求-功能-结构关系矩阵的导弹模块划分方法。首先,基于质量功能展开(quality function deployment,QFD)和公理设计方法提出连接设计需求、设计功能与物理组件相互作用关系的设计结构矩阵(design structure matrix,DSM)构建方法,并引入约束矩阵描述物理组件在机械、电气和功能上的关联度,以此形成基于遗传算法的导弹模块划分流程。最后,以一防空导弹为应用实例进行模块划分,并通过需求回溯分析验证模块划分结果的合理性和可行性。

改善低次烟叶品质的生物发酵工艺优化

为改善低次烟叶吸食品质,提升烟叶可用性,优选3种酶系、菌系(蛋白多肽酶系、木质酶系、增香菌系)配制成复合生物发酵制剂,以品质改善程度为评价指标,采用单因素法和均匀设计法优化了烟叶生物发酵工艺。结果表明:(1)最佳发酵工艺条件为,发酵制剂/烟丝质量比4%、物料含水量22%、发酵温度37℃、发酵时间42 h。(2)发酵工艺各因素中,发酵温度对品质改善程度大于物料水分、发酵时间。(3)在最佳发酵条件下,烟叶品质改善程度为1.04,杂气减少、刺激性降低,感官质量大幅提升,发酵后烟叶蛋白质、淀粉、果胶、木质素分别降低9.17%、15.59%、16.67%、7.84%,醛类、酮类、醇类等物质较原样分别增加了23.70%、15.33%、41.03%。通过发酵工艺优化,烟叶化学成分更协调,烟叶可用性提升。

基于混料设计研究代糖配比及其对炼乳品质的影响

目的研究不同代糖配比替代蔗糖对炼乳品质的影响。方法本研究采用单因素实验和混料设计研究4种代糖不同配比,得出最优代糖配方,并将最优代糖配方制备的炼乳进行水分活度、水分分布状态、质构、黏度、色差和感官品质等方面测定。结果4种代糖不同配比对炼乳感官品质和黏度的影响差异较大;优化代糖配方为:麦芽糖醇添加量23.70%、甜菊糖苷添加量0.17%、低聚半乳糖添加量5.10%、低聚木糖添加量1.00%(均为质量分数),感官评分为(87.30±1.27)分,黏度为(377.67±1.70)mPa·s。与蔗糖添加组炼乳相比,最优代糖配方炼乳水分活度降低(水分活度为0.75±0.01)(P<0.05),水分流动性减小;炼乳浓稠度和黏性均降低[分别为(236.34±4.86)g.sec和(26.94±5.53)g](P<0.05);色泽为淡亮黄色。结论最优代糖配方炼乳通过降低水分活度、减少水分流动性,从而有效地减少炼乳中自由水含量,进而改善了炼乳色泽和质构特性。

复杂山区铁路隧道勘察设计工程质量风险识别及耦合演化分析

铁路隧道工程勘察设计阶段工作对整个工程的全生命周期质量具有重要影响。然而,山区地质条件复杂、自然灾害频发等特点给铁路隧道勘察设计带来极大挑战,而且铁路工程质量风险构成复杂,风险事件的发生通常是多风险耦合作用的结果。目前关于铁路隧道的研究多聚焦于隧道的关键技术、施工安全、绿色性能等方面,鲜有立足勘察设计阶段的山区铁路隧道质量风险耦合研究。为从勘察设计阶段提高隧道工程质量目标的成效,提出基于突变理论的质量风险耦合效应分析模型。首先从内部诱因(人员、技术、管理)和外部诱因(地质、社会、自然)2个维度辨识影响复杂山区铁路隧道勘察设计的质量风险源,并结合改进重要性-绩效分析法(IPA)对风险因子进行层级归类;其次分析多风险因素耦合的形成机理,基于突变理论从耦合度和稳定性2个方面分析铁路隧道勘察设计工程质量风险耦合效应,并构建尖点突变模型进行风险耦合路径演化分析;最后以某复杂山区铁路隧道为例,利用提出的方法进行验证,确定其风险耦合等级为Ⅲ级,存在高风险的耦合程度,质量风险需要警惕,但整体系统处于稳定状态。该研究可以为复杂山区铁路隧道勘察设计工程质量风险决策提供理论支撑。

设计美学在室内设计中的重要性及影响分析

随着现代社会审美需求的提升,设计美学已经成为室内设计开发中必不可少的一个要素。本文从设计美学的角度出发,深入研究和分析了设计美学在室内设计中的重要性和影响。首先,阐述了设计美学的基本概念和理论,并以此为基础探讨了其在室内设计中的应用;其次,运用定量和定性研究方法,对比分析了运用设计美学和没有运用设计美学的室内设计项目,明确了设计美学能够提升室内设计的创新性,艺术性和实用性,从而提高人们的生活质量和社会文化品位;最后,对设计美学在室内设计中未来的发展方向和趋势进行了预测。实证结果证明,设计美学对于室内设计有着重要的影响,不仅可以丰富设计的多元性,而且可以提升室内设计的价值和意义,对于推动室内设计行业的发展起到了积极的推动作用。

基于网络点评的游憩体验质量与包装设计关系探究——以杭州清河坊街为例

近年来,游憩体验质量被提出并用于衡量游客满意水平,同时大众对旅游产品包装设计的要求也与日俱增。本文以杭州清河坊街区游客的网络点评为研究对象,运用网络文本分析方法,对游憩体验质量与包装设计的关系进行了探究。研究发现包装设计与游憩体验质量有显著联系,与包装设计有关的点评总体呈现积极的情感色彩,消极体验主要由于包装设计的潜在欺骗性与辨识度缺失。基于发现,提出可持续的旅游产品包装设计建议。

煤炭设计院设计质量管理评价体系构建研究

为提高煤炭设计院成果质量与质量管理能力,以Z煤炭设计院项目为研究对象,对影响设计成果的因素进行分析,以项目质量管理理论、方法及相关标准、规范为依据,结合4M1E方法,从人、机器、材料、方法、环境分析影响设计质量的指标因素,用层次分析法构建了层次评价模型,并对模型进行评价分析,实证分析结果表明:基于4M1E方法和层次分析法所构建的煤炭设计院设计质量管理评价体系,能实现为科学有效地控制设计过程和提升设计质量提供关键路径。最后根据评价结果提出设计质量优化的对策和建议,包括加强设计团队管理、技术建设,加强信息化管理及硬件配套,加强设计质量过程管理体系。

无机及分析化学实验的综合应用教学研究

从水环境安全检测的实际社会和工程技术需求出发,结合本科生无机及分析化学实验教学理论知识,设计了一个通过检测水样酸碱度、重金属含量、化学需氧量、硬度、溶解性固相含量而对水质进行综合性评价的教学实验。以无机及分析化学实验课程内容为理论基础,从本科生实际能力的锻炼和培养出发,为传统实验教学提供了实践应用新路线,为学生灵活利用课本知识解决水质检测的实际问题拓展了新思路。

某指挥大厅建声扩声设计

通过对指挥大厅进行体型分析和混响时间计算,分析其存在的声缺陷,结合指挥大厅使用功能确定音质设计指标。依据装饰效果和声学材料特性,在大厅各界面布置合适的吸声材料,在消除厅内声缺陷的同时,确保音质指标满足使用要求。通过视线分析调整显示屏高度和座席排布,确保指挥大厅内有良好的视觉效果。通过合理的扩声设计,确保指挥大厅内有良好的声环境。后期现场实测数据表明,音质客观参量处于设计范围值内,能够满足使用要求。

选煤工艺设计关键参数相关性探讨

原煤煤质、产品质量要求和分选设备类型是选煤工艺设计的3个关键参数,以2座选煤厂的煤泥分选环节为例,利用数值模拟方法预测了不同产品质量要求和不同设备选型时的分选效果,采用正交分析法分析探讨了3个关键参数对分选效果的影响程度及其相关性。

大功率LED灯的光学仿真设计

大功率LED灯具作为一种新型的照明产品,光学仿真设计是LED灯具设计过程中关键的环节之一,它能够模拟LED灯具的光学性能、发光特性、照度分布等重要参数,为灯具的优化设计和生产提供后期的指导和检验,有助于提高LED灯具的性能和质量,并促进其市场竞争力的提升。因此,研究目的在于探究大功率LED灯的光学仿真设计,为其质量提升、技术提升和应用推广提供重要支持。首先对大功率LED灯的光学特性进行了理论分析和计算,结合实际生产和应用需求,建立了一套基于光学仿真软件的LED灯光学仿真设计方案。