新型浮式系缆装置关键技术及可靠性分析

水位的瞬间变幅对水电站下游直立式码头靠泊安全影响巨大。借鉴船闸浮式系船柱原理提出了新型码头浮式系缆装置,在浮筒上对称地设4个弹簧平衡装置,可有效解决在较大系船缆绳拉力情况下,装置升降过程的不平衡阻力等关键技术问题。经依托金沙江水富港综合码头进行理论计算和模型实验验证表明,该技术是可行的,并可在类似工程中推广应用。     

天白水电站溢洪道弯曲段流态优化试验

为了改善开县天白水电工程溢洪道弯曲段流态,使断面内流量分布均匀,提高运行稳定性,根据其实际运行情况,结合以往类似工程的经验,提出了弯段底板高程正超高的优化设计方案。物理模型试验表明,采用这种工程方案可以很好地消减急流冲击波,改善弯曲段水流流态,提高下游消能能力。     

我国汽车环保检测业的发展现状与出路

在汽车行业快速发展的今天,汽车环保检测业作为汽车市场的服务行业,也逐步发展起来。本文首先阐述了我国汽车环保检测业的发展现状,重点分析了行业存在的问题,最后提出了行业发展的对策。     

A Variable Time-Discretization Strategies-Based,Time-Dependent Shortest Path Algorithm for Dynamic Traffic Assignment

Within the simulation-based dynamic traffic assignment (SBDTA) model, the time-dependent shortest path (TDSP) algorithm plays a crucial role in the path-set update procedure by solving for the current optimal auxiliary solution (shortest path). Common types of TDSP algorithms require temporal discretization of link/node time/cost data, and the discretization could affect the solution quality of TDSP and of the overall SBDTA as well. This article introduces two variable time-discretization strategies applicable to TDSP algorithms. The strategies are aimed at determining the optimal time discretization for time-dependent links/nodes travel time data. The first proposed strategy produces a specific discretization interval for each link. The second proposed strategy generates time-varying intervals for the same link over the analysis period. The proposed strategies are implemented in a link-based time-dependent A* algorithm in a SBDTA model DynusT and tested with two numerical experiments on two traffic networks. The results show that the proposed discretization methods achieve the research goal—to flexibly and scalably balance the memory usage and run time for SBDTA without degrading the convergence. This property is rather important when dealing with a large real-world network with a long analysis period.     

基于ABAQUS离心叶轮应力的有限元分析

通过对叶轮自然频率的提取可以得到结构的基本周期。将叶轮载荷的施加周期与基本周期作出对比,可确定叶轮的分析类型为瞬态动力响应或稳态静力分析。作为叶轮的稳态静力分析,需要考虑三个问题:起始阶段旋转加速度引起的应力;起始阶段之后恒定旋转速度引起的向心力;上述两项引起应力效应的叠加。通过这些分析能为叶轮选择材料与减重。     

hCTR1在非小细胞肺癌中的表达及其临床意义

目的探讨非小细胞肺癌(NSCLC)组织中hCTR1的表达与患者临床病理特征的关系以及减轻铂类药副反应的临床方法。方法采用免疫组织化学法,检测54例手术后接受含顺铂方案一线化疗的NSCLC患者组织中hCTR1的表达情况,其中35例患者于化疗前后采取水化、还原型谷胱甘肽、维生素B2及姜黄素等措施,分析hCTR1表达与NSCLC患者临床特征、病理类型、分化程度、临床分期、化疗疗效及化疗副反应的关系。结果 hCTR1的免疫阳性反应主要定位于NSCLC细胞的细胞质;hCTR1表达与含顺铂方案的化疗疗效及淋巴结转移呈正相关(P=0.02,P=0.01),而与年龄(P=0.29)、性别(P=0.32)、病理类型(P=0.19)、临床分期(P=0.52)、分化程度(P=0.62)及是否吸烟(P=0.89)无关;化疗副反应大小与性别(P=0.87)及年龄(P=0.47)无关,与在化疗前后是否采取水化、还原型谷胱甘肽、维生素B2及姜黄素等措施有关(P<0.05)。结论 hCTR1的表达可能是NSCLC患者以铂类为基础治疗的化疗疗效及淋巴结转移的重要预测因子。对于有高表达hCTR1的NSCLC患者化疗时,在化疗前后采取水化、还原型谷胱甘肽、维生素B2及姜黄素等措施,可以减轻化疗副反应。     

Simple adaptive filtering scheme to improve measurement accuracy of gyroscope on angular motion base

The objective of this work is to improve the measurement accuracy of a gyroscope on a angular motion base with a simple adaptive filter scheme. Two main topics are highlighted in this work. The first topic is to show building a dual-process model employed for the conventional Kalman filter. The second topic is to show developing a modified noise adaptive algorithm when measurement noise and process noise are unknown. The experimental results are presented to show that the simple adaptive filtering scheme outperforms the other conventional scheme in this paper in terms of noise reduction.     

A novel approach to design robust fault detection filter for networked control systems

In this paper, an approach for designing robust fault detection filter (RFDF) of networked control systems (NCSs) with unknown inputs is studied. The design aims at implementing the optimal trade-off between robustness of unknown inputs (including the item produced by networked-induced delay) and sensitivity of fault. The key design issue is to introduce an optimal fault detection filter based on NCSs with the control law compensation as the reference residual model of NCSs and to formulate the RFDF design as a model-matching problem. By applying H _∞ optimization technique, linear matrix inequality (LMI) approach is given to solve the model-matching problem. The validity of the proposed approach is shown by a numerical example.      

Y型墩连续刚构桥的设计

南京市六合区冶浦桥为25 m+40 m+25 m预应力混凝土Y型墩连续刚构桥,该文以该桥为例介绍了Y型墩连续刚构桥的设计,并总结了Y型墩连续刚构桥梁的结构特点和施工方案。