石化安装工程质量模糊综合评价

石化安装工程的质量评价主要依靠对工程实体质量的合格率以及相关技术文件等的复验,涉及安装过程质量管理和监控的手段不多,缺乏对安装工程质量评价方法的深入研究。本文结合生命周期理论和层次分析法建立了较为完整、系统的模糊综合评价方法。     

建设工程施工企业质量管理实践

建筑工程质量安全是施工企业管理的底线和红线。结合中铁建设集团有限公司近些年在质量管理方面的心得和经验,从施工企业的制度建设、标准化建设、管控手段、人员素质提升、创优创誉等方面,探讨建筑施工企业的质量管理。     

地质痕量金石墨炉原子吸收法检测研究

着重研究了地质痕量金石墨炉检测痕量金的实验过程中吸液量的确定。文中以部分数据的对比分析了吸样量对其灵敏度的影响。对比结果表明:使用适量的吸样量进行实验,可在一定程度上提高样品检验的精确度,灵敏度。     

C50混凝土推定抗压强度的概率统计分析

在对广州某施工现场进行混凝土回弹试验的基础上,采用χ2检验法对现场采集到的混凝土抗压强度选取正态分布进行检验,本文分析C50混凝土推定抗压强度的概率统计规律,计算结果表明,施工现场的C50混凝土推定抗压强度的概率分布服从正态分布,与规范中C50混凝土抗压强度的均值,变异系数相比,该C50混凝土抗压强度的离散型较小。     

用土力学的新概念解读和修正经典饱和土力学

论述了应该用有效应力的新概念代替经典有效应力原理。总应力压缩模量与渗流水等效压缩模量的曲线相似;有效应力压缩模量起加劲作用,而不是起决定性作用。土的压缩变形计算中应用有效应力原理是错误的。对于起始水力坡降,引入饱和粘性土的自由水压力衰减概念。在饱和粘性土中,自由水通道率折减不大,相对自由水压力通过一定厚度后衰减为零。所以,新概念土力学的算法接近我国规范:"对粘性土宜按水土合算计算"。还解读了地下室浮力折减、流沙陷阱等等。     

河南上宫金矿地质特征及矿床成因

上宫金矿位于华北地台熊耳山隆起部位,大型断裂带龙脖—花山背斜的南翼。矿区出露地层主要为中元古界熊耳群许山组火山岩系,这套火山岩化学成分表现为富铁、多钾、低钙铝的特点。矿区内断裂发育,以北东向为主,近南北向和近东西向次之。文章通过对上宫金矿成矿地质特征的分析,结合前人的研究成果,归纳出上宫金矿床地层、构造、岩浆岩三位一体的控矿机制,提出了地层、构造—岩浆岩以及围岩蚀变3个典型的找矿标志。     

An investigation of flavor complexity and food neophobia

The Food Neophobia Scale (FNS) measures reluctance to try novel foods. In describing foods, the term complexity is not well defined. The objective of this work was to assess the acceptability of familiar and novel foods, with varying levels of flavor complexity in both salty and sweet foods, by food neophobics and neophilics and to assess the effect of expectation (frame-of-reference effect) and familiarity on the acceptability of foods. FNS was administered to 864 subjects, who were classified to neophobic, or neophilic based on their FNS scores. Experiment 1, which was replicated twice, focused on four familiar foods, prepared in two versions, an original version and a more flavorful version. Subjects rated foods on complexity, acceptability and expectation. Neophilics gave significantly higher acceptability ratings to complex foods than bland foods and vice versa for neophobics. The different versions of foods did not always meet panelists’ flavor expectations. Experiment 2 included eight commercial foods, four salty and four sweet, with two novel and two familiar foods used within each taste category/quality. One of the foods within the familiar or novel pairs was expected to be flavorful (e.g. chili is typically served as spicy) and the other expected to be bland. Subjects rated foods on complexity, acceptability, familiarity and expectation. Six out of the eight flavorful versions of foods were chosen by subjects as more complex. Significant factors were taste quality, novelty, expectation, and familiarity (p < 0.05). Overall, neophilics were more accepting of novel foods than neophobics. The significant interaction between expectation and neophobia suggests that neophobics and neophilics may have different expectations of foods. Although neophobia × complexity was not significant, the neophobics’ acceptability ratings for bland versions were higher than for the flavorful versions.     

农民用水协会考核与评价体系的构建

农民用水协会是农村实施土地承包经营责任制后产生一种新型灌溉管理模式,笔者根据协会的工作性质和内容,从规范运行管理的角度出发,由管理机构、管理人员、管理制度、工程管理、用水管理、财务管理、档案管理和参与管理八个方面介绍了评价指标体系的构建。     

无线局域网技术应用

无线局域网通过无线方式发送和接收数据，尽量减少了对固定线路的依赖。这种业务服务的主要对象是在某些需要得到数据服务但缺乏有线数据接入条件的环境，如会议中心、展览中心、机场和酒店等。