探究用电检查管理中营配信息集成的重要作用

随着我国经济和科学技术的不断发展,用电检查也应从传统的实地管理模式转为自动化、信息化的管理模式。详细阐述、分析了营配信息集成在用电检查工作中的作用。     

新疆木垒哈萨克族民间传统木制餐具造型与制作工艺研究

木垒哈萨克族民间传统木制餐具的种类、功能、造型、生产工艺等都生成于草原游牧文化环境,又具有鲜明独特的民族特色,是哈萨克族民间手工艺的典型样式,体现了游牧民族生产生活方式及民族独特的审美态度。     

Recover Fault Services via Complex Service-to-Node Mappings in Wireless Sensor Networks

With the motivation of seamlessly extending wireless sensor networks to the external environment, service-oriented architecture comes up as a promising solution. However, as sensor nodes are failure prone, this consequently renders the whole wireless sensor network to seriously faulty. When a particular node is faulty, the service on it should be migrated into those substitute sensor nodes that are in a normal status. Currently, two kinds of approaches exist to identify the substitute sensor nodes: the most common approach is to prepare redundancy nodes, though the involved tasks such as maintaining redundancy nodes, i.e., relocating the new node, lead to an extra burden on the wireless sensor networks. More recently, other approaches without using redundancy nodes are emerging, and they merely select the substitute nodes in a sensor node’s perspective i.e., migrating the service of faulty node to it’s nearest sensor node, though usually neglecting the requirements of the application level. Even a few work consider the need of the application level, they perform at packets granularity and don’t fit well at service granularity. In this paper, we aim to remove these limitations in the wireless sensor network with the service-oriented architecture. Instead of deploying redundancy nodes, the proposed mechanism replaces the faulty sensor node with consideration of the similarity on the application level, as well as on the sensor level. On the application level, we apply the Bloom Filter for its high efficiency and low space costs. While on the sensor level, we design an objective solution via the coefficient of a variation as an evaluation for choosing the substitute on the sensor level.     

用于腺苷检测的基于级联扩增核酸适体电化学传感界面的构建研究

该文报道了一种基于酶级联扩增的电化学核酸适体检测腺苷的新方法。当腺苷存在时,滚环扩增的引物通过E.coli DNA连接酶的作用与通过巯基组装在金电极上的固定探针连接。在pHi29 DNA聚合酶的作用下,滚环扩增反应进行并产生一条与环形探针完全互补的长的单链,然后将大量金纳米粒子标记的核酸探针与滚环扩增的产物杂交。该传感界面电化学行为的结果表明,通过酶级联扩增的方法提高了检测腺苷的阻抗响应灵敏度,且选择性和重现性良好。用于腺苷的检测时,其线性范围为2.0μmol/L~100μmol/L,最低检测浓度为2.0μmol/L,表明该传感界面的设计可作为一种通用方法而有望用于其它目标物的检测。     

基于最大最小干扰的认知无线网络路由协议

针对认知无线网络中次用户对主用户的干扰问题,提出了一种基于最大最小干扰的路由协议。该协议通过对比不同路径对主用户的干扰温度,利用最大最小原则选择路由,能够实现在满足干扰温度限制的条件下,尽可能的充分频谱资源。通过大量仿真验证,该文算法实现的设计目的。     

复杂地质高陡边坡锚索施工实践及若干技术控制标准的探讨

以雅砻江锦屏一级水电站大坝左岸550 m级高陡边坡预应力锚固工程为研究对象,在复杂工程地质条件下进行了超长、高承载力锚索施工实践,就锚索造孔技术、束体安装工艺、注(灌)浆技术、张拉工艺等方面进行研究与总结.然后,对监测资料进行分析评价,形成了一套复杂地质条件下高陡边坡锚索施工的技术与方法.文中还结合水电行业锚固施工规范、锚喷支护国标中的技术控制标准,对施工中存在的技术问题进行探讨,可为同类型高边坡锚固工程施工提供参考和借鉴.     

定长槽单向弥散方程的理论解及其应用

论文导出了定长槽的单向弥散方程解。解包含槽下游封闭和开敞并伴有流速的两种条件。根据定长槽和半无限长槽单向弥散方程解的比较结果,只要弥散系数D和流速u相等,且弥散前锋尚未到达定长槽下游边界以前,那么两者相对浓度C/C0的分布相同。据此,可取定长槽进行试验,而用相应于半无限长的简单公式计算分析。     

水电站对外公路设计特点及主要技术标准分析——以乌东德水电站工程为例

水电站对外公路设计既要满足水电站施工期间对外交通运输要求,又要便于水电站完工后移交地方交通部门统一管理。结合金沙江上游乌东德等梯级水电站对外公路设计实践,通过对水电站对外公路的任务、功能及特点的分析,从公路设计等级、设计速度、建筑限界、荷载标准、平曲线设计等方面,对主要技术标准和指标的运用进行了论述;总结了设计经验和体会。对类似工程设计具有参考作用。     

EFFECTS OF ENTRAINED AIR MANNER ON CAVITATION DAMAGE

Early in 1953 the experiments by Peterka proved that air entrainment has effects on decreasing cavitation damage.This technology has been widely used in the release works of high dams since the inception of air entrainment in the Grand Goulee Dam in 1960.Behavior,mechanism and application of air entrainment for cavitation damage control have been investigated for over half century.However,severe cavitation damage happened due to complex mechanism of air entrainment.The effects of air entrainment are related...