孪生数据驱动的绿色切削工艺优选决策

为了快速优选低碳且具有环境友好性的绿色切削工艺,提出了一种孪生数据驱动的绿色工艺优选决策方法。首先,建立了数字孪生驱动的切削加工工艺优选决策流程;其次,以加工质量、加工时间、加工成本、资源消耗、环境影响为一级评价指标,建立了绿色切削工艺优选评价指标体系;再次,采用网络层次分析法对评价指标进行权重计算,并基于概率犹豫模糊理想值法及孪生数据对备选的绿色切削工艺进行优选决策;最后,以某航空企业的叶片加工工艺优选为例进行实例验证。结果表明：该方法能够充分利用数字孪生车间的仿真预测、历史数据挖掘、实时采集等功能,以孪生数据的形式为工艺评价提供全面的数据源;同时所建立的评价决策模型实用性较强,符合现实的切削工艺优选决策场景,模型求解方法鲁棒性好。     

面向低碳的车间生产过程数字孪生建模

智能制造关键技术的不断突破及其在制造业的快速应用极大地改造着传统车间的生产模式．现代企业的生产方式逐渐朝着集成化、复杂化和智能化方向发展,给车间生产过程低碳运行目标带来挑战．为了提高车间生产过程能耗管理的质量与实时性,提出了一种面向车间能耗管理的数字孪生建模方法．基于物理生产车间的生产资源与车间布局方案搭建虚拟生产车间,通过物理与虚拟车间设备运动信息的交互为几何模型添加运动关系,并结合生产节拍建立车间运动规律的数字孪生模型;采集单机物理生产设备随加工参数变化的能耗数据,使用BP神经网络建立多设备的能耗模型,基于获取物理与虚拟车间实时交互的能耗数据建立车间能量流动规律的数字孪生模型．最终实现包含动态能耗信息的车间生产过程数字孪生建模．同时基于该数字孪生模型提出了一种面向车间生产过程的能耗优化方法,结合刀具寿命、机器人运动平稳性、生产时间等多源评价指标建立多目标优化函数,获取数字孪生模型中的动态能耗数据并应用蜂群算法实现对车间低碳生产需求下的多设备加工参数协同优化．最后以给定工件的生产过程为例,对所提数字孪生建模方法和建模效果进行验证,实验结果表明借助该数字孪生模型环境下的生产过程优化方案...     

犹豫模糊语言多属性决策灰关联分析方法及其应用

以区域金融生态环境评价问题为研究对象,提出一种新的融合方法;针对犹豫模糊语言术语集,结合灰色关联分析理论,提出犹豫模糊语言灰色关联度的概念,并基于离差最大化原理给出最优化模型,对各属性进行客观赋权;最后用实例验证了其有效性和可行性,突破了传统的灰色关联分析法应用于区间属性的决策问题,研究了更模糊且更贴近现实的语言评价环境,该方法不仅能够充分利用原始评价数据,且能减少不必要的信息损失。     

基于区间犹豫模糊偏好关系的多属性决策方法

在现有的区间偏好关系和犹豫偏好关系基础上,首先定义了具有专家犹豫优先度的乘 性一致性区间犹豫模糊偏好关系,并提出了其一致性和评价对象优先权重之间的关系;其次,基于 模糊决策思想,建立线性规划模型,求出对应评价对象的区间权重向量;最后将模型应用于实例 中,说明其可行性。     

基于改进隶属度函数的电能质量模糊综合评价

通过分析电能质量模糊综合评价中的隶属度函数问题,提出了一种改进的隶属度函数来量化刻画电能质量评价指标各质量等级的模糊特性,从而实现更为细致的电能质量的模糊综合评价,解决了电能评价指标两质量等级之间难以建立联系和量化刻画的问题.文中首先对电能质量指标的权重、确定隶属度函数参数的指标限值及质量等级划分问题进行了分析;然后以传统的岭形函数为基础进行改进,得到基于评价指标质量等级的隶属度函数,并对电能质量的各项评价指标建立了模糊模型;最后运用所设计的算法对某地区的电能质量数据进行评价,结果验证了文中方法的实用性和有效性.     

建筑火灾风险评价中定性指标的模糊灰色评价方法研究

对建筑火灾风险评价中的定性指标进行量化时,其评判信息具有模糊性和灰色性。根据模糊灰色理论,提出了对建筑火灾风险评价中的定性指标进行量化的灰色评价方法,建立了建筑火灾风险模糊灰色综合评价模型。通过实例,对建筑物防火安全管理中的定性指标进行了量化,并评价了其防火安全管理水平。该方法将为评价建筑物的防火安全性提供了更客观的技术手段。     

高校学报核心竞争力评价研究

模糊层次分析法是将层次分析法和模糊综合评价法的优点进行有机融合,用层次确定各影响因素的权重,用模糊综合评价法确定各方案指标,对评价进行量化。建立了高校学报核心竞争力评价模型,并用实例验证了模型的有效性。     

数控装备质量的模糊物元综合评价方法

针对数控装备质量多层次指标评价问题,提出了一种基于模糊物元模型的综合评价方法。该方法利用模糊物元理论分析多个质量特性及其属性特征,并建立了数控装备质量综合评价模型。采用层次分析法和信息熵确定评价指标权重,建立基于最小二乘法的优化组合权重模型计算组合权重,并运用模糊物元法给出评价结果。实例研究表明该方法可行、合理。     

基于犹豫模糊集的移动式压力容器充装站应急预案评价体系

为科学客观地评价移动式压力容器充装站应急预案的质量,提高充装站应急处置能力,基于现有应急预案规章制度,构建了移动式压力容器充装站应急预案质量分级指标体系并建立了应急预案质量等级评价模型。移动式压力容器充装站应急预案质量分级指标体系包括了5个二级指标和27个三级指标。应急预案质量等级评定模型以犹豫模糊集理论为基础,将应急预案质量划分为5个等级。该评价模型采用集值迭代法计算各指标权重,并结合HFWA算子计算各指标的最终犹豫模糊得分。将该模型应用于浙江省某天然气有限公司突发事故应急预案,根据模型计算最终得分结果,将该公司应急预案质量等级定为“良好”,验证了该模型的可行性。     

基于犹豫模糊软集的专利质量评价模型

现有的专利质量评价方法以专家打分为主,需要专家对所评专利的全部指标给出一个评价值,并根据指标的相对重要程度分配权重值。但指标体系涉及不同领域的多个指标,专家对自己研究领域以外的指标难以做出准确评价,模糊性指标也使专家会在几个评价值之间犹豫。针对犹豫模糊软集可以更加准确的描述事物模糊本质,对可选对象没有限制,充分考虑专家决策的犹豫度得特性,本文提出一种基于犹豫模糊软集的专利质量评价模型,给出评价方法的具体步骤,并通过案例分析说明该方法的可行性与可靠性。     

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.     

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.     

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.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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.     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.