基于改进失效模式与后果分析的制造执行系统风险分析模型

针对智能制造背景下数字化工厂制造执行系统(MES)的风险管理问题,通过组合权重和灰色关联分析(GRA)模型对失效模式与后果分析(FMEA)模型进行改进,从而构建MES风险分析模型。考虑风险因子的重要性,将主观层次分析法与客观熵权法相结合确定风险因子权重,既保证重要性指标所占权重又减少了评价的主观性和片面性。专家小组对MES中的潜在风险进行识别并采用模糊语言术语集进行评价,然后通过GRA方法计算失效模式的关联度,有效提升了风险排序的精确性。     

基于区间值直觉模糊集的技术创新风险评价方法

降低企业技术创新风险是提高企业技术创新绩效的关键.首先以技术创新六阶段模型为基础,针对技术创新的全生命周期识别了18项潜在风险.之后基于区间值直觉模糊集构建了应用于企业技术创新风险评价的模糊失效模式与影响分析(failure mode and effect analysis,FMEA)方法.该方法利用区间值直觉模糊集来评价技术创新各潜在风险的严重度、发生度和检测度,通过基于逼近理想解排序法(technique for order preference by similarity to ideal solution,TOPSIS)的非线性规划模型获得风险优先级并进行排序,以此为依据确定潜在风险的优先处理次序.最后以D公司的座椅开发项目为例,验证了该模糊FMEA方法的可行性.     

基于联合距离评估法的共享电动汽车驾驶风险评估

基于模糊信息和多属性决策,提出一套共享电动汽车（SEVs）失效模式与影响分析（FMEA）方法,包括采用互评法进行专家筛选与赋权,构建风险评估标准,采用共识理论对专家意见进行检验,采用贴近度最优化法对风险因子进行客观赋权,引入联合距离评估（CODAS）法对失效模式的风险水平进行排序等。结果表明,高风险的失效模式主要分布在动力系统和行车系统。灵敏度分析和对比分析验证了结果稳健性和方法有效性。最后,提出了可行性安全管理措施建议。     

基于后悔理论和COPRAS的 概率语言FMEA风险评估方法

针对传统故障模式和影响分析（FMEA）方法存在容易造成专家风险评估信息的丢失、忽略专家有限理性行为和风险指标之间的相对重要性等问题,提出了一种基于后悔理论和复杂比例评估（COPRAS）方法的概率语言FMEA风险评估方法. 首先采用概率语言术语集（PLTS）描述专家风险评估信息的不确定性和模糊性;然后运用概率语言连乘层次分析法（PL-MAHP）和最大偏差法相结合的综合赋权法获得风险因子综合权重;其次考虑到风险评估过程中专家的心理特征行为,利用后悔理论和COPRAS方法确定故障模式风险优先序;最后通过砂轮架故障风险评估案例来验证该方法的适用性和有效性. 灵敏度和对比分析结果表明：相比于现有其他方法,该方法得到的故障模式风险排序结果更合理可靠.     

基于失效模式与后果分析扩展模型的外包风险分析

失效模式与后果分析(FMEA)是一种重要的质量管理与可靠性分析工具,然而传统模型在实际运用中存在若干缺陷.利用区间二元混合加权距离(ITHWD)测度对传统FMEA模型进行改进,利用区间二元语义FMEA模型,并以刀具管理业务合同履行模块为例进行失效风险分析.通过传统模型与改进模型结果的比较,发现后者不仅能减少评价信息转换过程中产生的信息失真或损失情况,而且还考虑到了风险因子的主客观权重以及决策者的决策态度,从而提高了最终失效模式优先度排序的准确性、可靠性和灵活性.     

基于云模型与凝聚型层次聚类的失效模式与影响分析方法

针对传统失效模式与影响分析(failure mode and effect analysis,FMEA)的不足,提出了一种基于云模型和凝聚型层次聚类算法的改进FMEA方法。首先,运用云模型对专家评估信息进行描述与集结;然后,结合凝聚型层次聚类算法识别云模型评价信息,利用聚类子簇确定失效模式间关联关系,利用聚类结果确定失效模式风险等级。最后,以在线教学失效风险评估为例,验证了该改进FMEA方法的可行性和有效性。     

高校资助育人关键风险分析的模型改进

以高校资助的“育人”环节为研究对象,对传统失效模式与后果分析（FMEA）模型加以改进,通过结合三角模糊数、风险指标赋权、专家客观赋权、德尔菲法和调研访谈等方式,提出模糊FMEA模型用以分析“育人”环节的失效模式和关键风险。研究发现,改进模型能够更客观反映风险指标重要性和专家话语权的差异,具有较高的精确性和可靠性,同时针对高风险失效模式提出了相应建议。     

基于失效模式与后果分析的混合燃料发动机风险分析

针对发动机在使用混合燃料过程中存在的潜在失效模式和故障风险,尝试以改进失效模式与后果分析(FMEA)模型展开风险分析.基于模糊集理论、灰色关联分析和决策试验与评价实验室方法构建改进FMEA模型,将专家定性评价转化为定量指标并进行风险优先值(RPN)、关联度和原因度的计算.将计算结果进行风险排序和比较,由此揭示了使用混合燃料的发动机的风险排序,进而对潜在的失效模式提出风险控制建议.     

采用模糊层次分析法的PFMEA方法改进及应用

为解决因各专家判断矩阵过于均一化而导致的风险排序与实际发生偏差的问题,在传统的基于模糊层次分析法的过程失效模式与分析(PFMEA)方法基础上做进一步的改进.从专家的个体区别和职业类别两方面考虑,分析专家判断矩阵变化程度对专家分组及评估各组别对专家权重的影响,进而合理设定专家权重.通过该改进方法在汽车空调冷凝器制造过程中的实际应用,验证方法的有效性.研究结果表明:改进的基于模糊层次分析法的PFMEA方法能更准确地对产品失效风险进行排序.     

基于SFMEA和三角模糊软集的电池系统风险评估

针对以锂离子动力电池为代表的典型复杂机电系统设计阶段的可靠性提升和潜在失效模式风险评估等问题,提出了将SFMEA和三角模糊软集融合分析的锂离子动力电池系统设计阶段风险评估方法.在对锂离子动力电池系统层次划分的基础上,引入评估专家群对潜在失效模式开展独立分析,利用专家风险评估矩阵收集初评数据与三角模糊软集进行模糊化和信息融合计算,计算结果利用梯级平均综合方法清晰化处理,通过故障模式融合参数分解与权重分配,得出风险评估结果,并进行风险的评分和排序.结果表明:融合三角模糊软集进行风险评估的SFMEA在系统设计初期将风险模式与评估结果的量化与评分,能够在系统级设计方面提高设计的稳健性,降低系统失效的风险;该方法在锂离子动力电池系统设计风险评估阶段的适用性良好.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that