固体体积率检测方法在填石路基压实质量控制中的应用

随着填石路基在公路和市政工程的广泛应用,其相对于的压实质量检测方法也在不断的发生变化。本文就固体体积率在填石路基施工压实质量控制的应用进行研究,为同类工程试验检测提供参考。     

Viscous behavior of PS,PP, and ABS in terms of temperature and pressure‐dependent hole fraction

We have developed a zero‐shear viscous model in terms of temperature‐ and pressure‐dependent hole fraction computed from Simha‐Somcynsky Hole Theory. This model successfully interprets the viscosity data of PS, PP, and ABS as a function of hole fraction for a broad range of temperature and pressure. We have also introduced and discussed a new term: Viscoholibility; the derivative of logarithm of viscosity with respect to hole fraction. When the hole fraction takes highest available value, the viscoholibility approaches asymptotically to a constant value by which the viscosity changes linearly with the hole fraction. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Robot programming using augmented reality: An interactive method for planning collision-free paths

Current robot programming approaches lack the intuitiveness required for quick and simple applications. As new robotic applications are being identified, there is a greater need to be able to programme robots safely and quickly. This paper discusses the use of an augmented reality (AR) environment for facilitating intuitive robot programming, and presents a novel methodology for planning collision-free paths for an n-d.o.f. (degree-of-freedom) manipulator in a 3D AR environment. The methodology is interactive because the human is involved in defining the free space or collision-free volume (CFV), and selecting the start and goal configurations. The methodology uses a heuristic beam search algorithm to generate the paths. A number of possible scenarios are discussed.     

Heating Conditions and Bread-Making Potential of Substandard Flour

ABSTRACT Heating weak bread flours (commercial cookie flour; commercial stone‐milled bread flour; Fundulea, a weak bread cultivar) at 80°C for 15 min had a positive effect on bread volume (P < 0.05). This positive effect was best seen when ascorbic acid was removed from bread formulation. Crumb springiness and fineness of grain, but not crumb hardness, were significantly improved after flour heating; cohesiveness improved with heated cookie flour (P < 0.05). After heating, flour a‐amylase content was lower; dough‐mixing stability of cookie flour doubled to 7.1 min but dropped from 18.0 to 4.8 min with standard bread flour. Heating offers possibility to upgrade substandard flour for bread‐making applications, especially in oxidant‐free dough system.     

An exploration of the accuracy of an invasive method for measuring the volume of specimens of Amoeba proteus

A method is described for measuring the volume of individual specimens of Amoeba proteus which utilizes an easily constructed compressor to flatten the specimen to a known thickness. The microscopic image of the flattened specimen is captured on tape, digitized and analysed with the NIH Image software. The results from one specimen are given to illustrate the sources and magnitude of errors affecting these volume measurements.     

Recent Advances in Volume Visualization

In the past few years, there have been key advances in the three main approaches to the visualization of volumetric data: isosurfacing, slicing and volume rendering, which together make up the field of volume visualization.
In this survey paper we set the scene by describing the fundamental techniques for each of these approaches, using this to motivate the range of advances which have evolved over the past few years.
In isosurfacing, we see how the original marching cubes algorithm has matured, with improvements in robustness, topological consistency, accuracy and performance. In the performance area, we look in detail at pre-processing steps which help identify data which contributes to the particular isosurface required. In slicing too, there are performance gains from identifying active cells quickly.
In volume rendering, we describe the two main approaches of ray casting and projection. Both approaches have evolved technically over the past decade, and the holy grail of real-time volume rendering has arguably been reached.
The aim of this review paper is to pull these developments together in a coherent review of recent advances in volume visualization.     

经济适用房设计与可持续发展——兼谈住宅小区规划设计的一些经济问题

本文就当前住宅建设的小区规划设计、人居环境、节约用地、绿化率、容积率、空房积压等诸多问题进行分析、探讨 ,并提出了自己的见解。目的在于对住宅建设规划设计中的经济问题能引起人们的足够重视 ,以期推动住宅市场的进一步发展。     

储油罐油位油量监测仪的研制

一种基于硅压阻传感器的智能型储油罐油位油量监测仪器，它具有防火、防爆、安全简单、维护量小、操作使用方便等特点，其绝对精度在±５ｍｍ以内，量程为１０ｍ．运行表明，仪器各项指标可满足实际使用要求．     

A finite volume method for solid mechanics incorporating rotational degrees of freedom

A novel finite volume (FV) based discretization method for determining displacement, strain and stress distributions in loaded two dimensional structures with complex geometries is presented. The method incorporates rotation variables in addition to the displacement degrees of freedom employed in earlier FV based structural analysis procedures and conventional displacement based finite element (FE) formulations. The method is used to predict the displacement fields in a number of test cases for which solutions are already available. The effect of mesh refinement upon the accuracy of the solutions predicted by the method is assessed. The results of this assessment indicate that the new method is more accurate than previous FV procedures incorporating displacement variables only, particularly in cases where bending is the predominant mode of deformation, and therefore the new method represents a significant advance in the development of this type of discretization procedure. Interestingly, the results of the accuracy assessment exercise also indicate that the new FV procedure is also more accurate than the equivalent FE formulation incorporating displacement and rotational degrees of freedom.     

谈谈加油站地罐容积标定系统的研制与开发

介绍了加油站地罐容积标定系统的工艺流程及工作原理，对系统的误差和系统的总不确定度进行了分析，其系统的误差及总不确定度均符合检定要求。该系统具有操作简单，编制地罐容积表快且精度高。该系统具备了推广使用价值。