Collection Conduits Including Subsurface Drains

Numerous types of pipes and channels with spatially increasing flows in environmental engineering applications are identified by type and function and referred to as collection conduits. An overview of methods for designing and analyzing collection conduits is provided. Full conduits with nonuniform and uniform inflow are first considered. Dimensional analysis is then employed to demonstrate the relationship between variables for open channels; that leads to the identification of possibilities for generalized numerical solutions. Prior collection conduit applications are discussed within the framework of the dimensional analysis (which also pertains to some constant-flow applications). A previously unpublished generalized numerical solution for rectangular collection conduits is presented. Subsurface drains are addressed with particular emphasis, including the use of numerical methods to develop a new generalized chart and relation to other design methods. Among the important conclusions for subsurface drains is that the somewhat common practice of using Manning’s equation alone for such problems is not generally adequate. Examples and practical design suggestions are included, and the use of computer-based numerical methods is discussed more generally.     

Assessment of obsessive-compulsive symptom dimensions: Development and evaluation of the Dimensional Obsessive-Compulsive Scale.

Although several measures of obsessive-compulsive (OC) symptoms exist, most are limited in that they are not consistent with the most recent empirical findings on the nature and dimensional structure of obsessions and compulsions. In the present research, the authors developed and evaluated a measure called the Dimensional Obsessive-Compulsive Scale (DOCS) to address limitations of existing OC symptom measures. The DOCS is a 20-item measure that assesses the four dimensions of OC symptoms most reliably replicated in previous structural research. Factorial validity of the DOCS was supported by exploratory and confirmatory factor analyses of 3 samples, including individuals with OC disorder, those with other anxiety disorders, and nonclinical individuals. Scores on the DOCS displayed good performance on indices of reliability and validity, as well as sensitivity to treatment and diagnostic sensitivity, and hold promise as a measure of OC symptoms in clinical and research settings. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

链板运输机结构改进

分析链板运输机存在的问题，介绍对其结构的改进，改进后降低了设备的故障率，提高了使用寿命。     

浅析南钢翻板机划伤钢板问题产生原因及其解决方法

在中厚板生产中,钢板需要通过横移装置运送到翻板机处进行表面质量检查,但在翻板机翻臂的提升过程中,钢板在重力作用下沿翻臂向下移动,并在横移链条之间产生相对滑动,导致钢板下表面划痕。南钢从理论力学角度对滑动过程进行分析,最终确定钢板划伤原因并制定设备改进方案。通过实施增大翻板机翻臂托轮直径和标高等设备改造措施,解决了翻板机划伤钢板表面的难题。     

在轧钢设备翻转装置中采用链传动代替齿轮—齿弧传动

本文介绍了在轧钢设备翻转装置中采用链传动代替齿轮－齿弧传动，不仅简化了设备结构，且容易加工，大大降低了机械加工费用，在实际应用中取得了很好的效果。此传动方式也可推广用于其他翻转装置。     

变频器在链条炉系统中的应用

本文介绍了链条炉的定义，链条炉应用变频调速的意义，链条炉控制系统的原理，锅炉采用变频调速控制的优点，变频调速的控制方法和逻辑，链条炉采用变频调速装置的节能分析。     

供应链管理基础浅析

文章阐述了主要对电子商务中的供应链管理基础,并对其进行了分析。     

Support vector regression via MCMC within evidence framework

This paper proposes a novel approach, Markov Chain Monte Carlo (MCMC) sampling approximation, to deal with intractable high-dimension integral in the evidence framework applied to Support Vector Regression (SVR). Unlike traditional variational or mean field method, the proposed approach follows the idea of MCMC, firstly draws some samples from the posterior distribution on SVR??s weight vector, and then approximates the expected output integrals by finite sums. Experimental results show the proposed approach is feasible and robust to noise. It also shows the performance of proposed approach and Relevance Vector Machine (RVM) is comparable under the noise circumstances. They give better robustness compared to standard SVR.     

Pressure-Impulse Diagram for Blast Loads Based on Dimensional Analysis and Single-Degree-of-Freedom Model

Characteristics of a pressure-impulse diagram for blast loads are studied based on a dimensional analysis and a single-degree-of-freedom model. Structural behavior is dominated by the fundamental elastic response mode and the structural damage is controlled by the maximum structural deflection. The blast loading is simplified into a descending pressure pulse. A characteristic curve in nondimensional loading parameter space is used to define an isodamage critical diagram, pressure-impulse diagram, to distinguish damaged and undamaged ranges in the loading parameter space. Three damage regimes on a pressure-impulse diagram, i.e., (I) impulse-controlled damage, (II) peak load and impulse-controlled damage, and (III) peak load-controlled damage, exist respectively for impulsive, dynamic and quasistatic structural response regimes determined by the ratio between loading time and the response period of a structure. It is observed that there is a noticeable loading shape influence on the pressure-impulse diagram in Regime-II when both peak load and impulse are important for dynamic structural response. A unique effective pressure-impulse diagram is proposed to eliminate the pulse loading shape effect on a pressure-impulse diagram.     

Designing and Selection of Mixed Sampling Plan with Chain Sampling as Attribute Plan

This paper deals with the operating procedure of mixed acceptance sampling plans with chain sampling as attribute plan. The operating characteristics function and other associated measures of the plan are provided. The plan is designed through AQL and IQL. Tables are constructed for easy selection of the plan. Illustrations are also provided.