Assessment of the degree of reinforcement demand (DRD) for rock slope projects—principles and a case example application

The rational design of rock slope support is particularly important if the slope is steep, if safety is important, and if the design significantly affects project costs. Theoretically, slopes with stability factors smaller than 1.0 should be reinforced for maximum safety and efficiency. To optimize reinforcement design of a rock slope, an engineer should distinguish those locations needing critical, general, or even no reinforcement from other parts of the slope. The purpose of this paper is to present the concept of the degree of reinforcement demand (DRD) for rock slope projects and the quantitative procedures for the DRD assessment. The main influencing factors can be determined, classified and assigned based on knowledge from theoretical analyses, practical experiences and monitoring. To show variances in the DRD values with time and space, a rock slope to be assessed should be divided into a number of slope zones and the construction schedule into different periods. When geological conditions, mechanical properties of the rock mass, displacement measurements and/or construction have changed in a slope zone, the DRD value in this slope zone will increase or decrease. So for convenience in the DRD assessments, such changes in the main factors and measurements are analyzed via matrices. For example, the influencing factor matrix and the displacement ratio matrix, i.e. [A]_k and [E]_k, are, respectively, used to indicate possible modifications in the main factors and displacement measurements for all slope zones in the kth period. The DRD matrix, [R]_k, can be obtained by multiplying [A]_k and [E]_k, and those elements along the leading diagonal of the matrix [R]_k are the DRD values corresponding to different slope zones in the kth period. To demonstrate the feasibility of the DRD assessment, an application relating to the shiplock slope (including the lower-stream slope) of the Wuqiangxi hydropower station in China is described in this paper.     

单纤维平均梳理力的研究

建立了单纤维平均梳理力的计算公式,通过工艺实验揭示了不同梳理工艺条件下,单纤维平均梳理力对生条中棉结和短绒的影响,并根据单纤维平均梳理力推算了锡林齿条前角其余角的最小值.     

基于三生融合度的传统村落分类研究 ——以环太湖流域传统村落样本为例

随着对生产、生态、生活之间相互影 响、和谐发展的了解,以及对传统村落重要性认 知的不断加深,以牺牲环境、无视生活为代价 谋求经济发展的方式逐步被“三生融合”的发 展理念所替代。然而现阶段“三生”之间的磨合 与拮抗在很长一段时间内仍将是禁锢传统村落 发展的重要因素。同时,中国传统村落具有种类 多、分布广、数量大等特性,为相关研究带来巨 大的挑战。基于此,论文尝试以“三生融合”为 导向,构建基于“三生融合度”的传统村落分类 模型,旨在为基于分类基础上传统村落活态化 发展策略的后续研究奠定基础,并以环太湖流 域具有代表性的国家级传统村落为例,进行分 类模型的实证研究。结果表明,根据分类模型可 将环太湖流域传统村落划分为成熟改善型、拮 抗调整型及失衡重构型三类,能有效结合不同 类型传统村落的“三生”特征,针对性地总结凝 练出保护发展的经验与策略,其分类过程与结果亦可为其他地区的传统村落定位与发展提供参考和借鉴。     

真空联合堆载预压处理深厚软土效果分析

软土由吹填土和原状淤泥质土构成,平均深度为25m,且表层覆盖回填土层,采用真空联合堆载预压法进行处理。检测结果表明,该场地表层承载力达到100kPa以上,下部淤泥质土层承载力达到80kPa,平均沉降153.14~202.79cm,加固效果非常明显。实践证明,针对该区的深厚淤泥质软土地基,真空联合堆载法具有加固效果好、工期短和施工安全等优点,值得在该地区工程建设中推广应用。     

On the degree of completeness of cryptographic functions

This paper discusses the degree of completeness of cryptographic functions, which is one of the cryptographic criteria should be considered in the design of stream ciphers. We establish the re- lationships between the degree of completeness and other cryptographic criteria. For resilient Boolean functions, a method to enhance the degree of completeness is proposed, while the nonlinearity and the algebraic degree do not decrease. Moreover, two constructions of resilient functions are provided, which have optimal degree of completeness, high nonlinearity, and high algebraic degree.     

电信业核心客户健康度评估建模研究

针对电信业客户流失问题,讨论了核心客户健康度评估模型的构建与应用。对模型的建立过程及评价进行了描述,运用定性归纳、聚类分析实现模型指标的确定;运用归一法、熵权系数法实现健康度评价;运用决策树法实现健康度等级的划分。     

基于ELECTREⅠ法的装备修理过程质量评价研究

将修理过程拆分为4个主要修理工序,构建影响修理过程质量的评价指标体系.以我军4家同级别修理工厂的装备修理过程为例,运用ELECTREⅠ理论,建立装备修理过程质量的综合评价模型.通过提出净优势度的概念,很好地解决了ELECTRE Ⅰ理论评价结果不完全排序的问题,也进一步验证了评价模型的科学性和实用性.     

制造网格任务分解策略和相关度判定研究

制造网格任务分解能大大降低制造任务执行过程中的信息交互复杂度和约束关系,提高制造网格协同工作的效率,从而保证服务质量(Quality of Service,QoS)。弱耦合原则是制造网格任务分解时的关键准则。根据制造任务之间的弱耦合要求,即要求分解后的子任务(活动)间的相关度较小(弱耦合),提出了一种基于模块化的任务分解策略,分析了模块化分解的可行性和分解过程,并建立了分解模型,提出了一种制造网格子任务(活动)间相关度判定的方法,并通过一个实例说明了任务分解相关度的判定方法。     

电信业核心客户健康度评估建模研究

针对电信业客户流失问题,讨论了核心客户健康度评估模型的构建与应用。对模型的建立过程及评价进行了描述,运用定性归纳、聚类分析实现模型指标的确定;运用归一法、熵权系数法实现健康度评价;运用决策树法实现健康度等级的划分。     

柴油机磨合油选用的灰色关联度分析

本文在磨合油选用定性分析的基础上，对其铁元素浓度序列和磨损度序列进行了A型关联度，绝对关联度和B型关联度。分析结果表明绝对关联度的分辨率较低，A型关联度与B型关联度的分析结构与定性分析一致。磨合油的选用既要考虑序列的“相近性”，又要考虑其“相似性”，因此A型关联度与绝对关联度的加权组合，B型关联度都是适用的。磨合序列的灰色关联度分析为磨合油的选用提供了一种定量分析方法。