Second Harmonic Generation in 3‐D Uniform Arrangement of Type I Collagen on Nonlinear Optics Microscopy

Second harmonic microscopic imaging and spectroscopy technology has become a powerful tool for biomedical studies, especially in fibrosis‐related diseases research. And type I collagen is the major risk factors for fibrotic diseases. In this study, model for three‐dimensional (3‐D) uniform arrangement type I collagen is set up for researching the second harmonic generation (SHG) on nonlinear optics microscopy. Based on this model, we discuss the influence of different length and size collagen in 3‐D arrangement type I collagen. Results can guide us to neatly judge the size, length, and molecules density effect on SHG. For practical application, this theoretical approach can lead us to analyze different severity of collagen diseases. SCANNING 35:12‐16, 2013. © 2012 Wiley Periodicals, Inc.     

一种用于洗气塔的新型塔顿——淋降式穿流角钢塔板

淋降式穿流角钢塔板由于结构简单、防堵效果好、压降低，已在国内40余座塔中得到成功应用。本文主要介绍了该塔板的基本结构、压降估算、塔内排列新方案以及应用实例。     

多股流换热器设计的量纲1温差场均匀性优化因子

本文提出了多股流换热器无量纲温差场均匀性优化因子的概念,并且研究了该因子在多股流换热器通道排列上的应用。研究表明：无量纲温差场均匀性优化因子能够作为多股流换热器通道排列的一个有效的评价指标,并进而指导多股流换热器的设计。     

芳烃抽提装置设计中的技术革新

对芳烃抽提装置进行优化和技术改进,使芳烃装置达到正常运行时无污水排放的目标,以提高产品质量,降低生产成本。     

新时期的冷却液净化需求

正2016年已悄然而至,在这辞旧迎新的时刻,我代表Turbo全体同仁向所有客户及社会各界朋友致以诚挚问候和衷心感谢。新时期的冷却液净化需求没有变化,变化的是我们的应用环境。冷却液的净化需要满足以下需求:排除有害颗粒物,不能破坏冷却液,净化效果满足工艺需求,加工设备不会被污染,无可视杂质,可以承受净化设备成本。简单来说,在过去的几年里我们的应用环境发生了变化。新的时期,所有的磨削工艺都需要在高压下运行。随着加工效率被更多地关注,人们开始重视过滤     

A new type of supramolecular assembly consisting of crown ether complex cation and a polyoxometalate anion: Synthesis and crystal structure of [Na(C20H24O6)(CH3CN)2]2[Mo6O19] · 4CH3CN

A novel supramolecular assembly consisting of sodium-dibenzo-18-crown-6(DB18C6) complex cation [Na(C₂₀H₂₄O₆)(CH₃CN)₂]²⁺ and isopolyanion [Mo₆O₁₉]²⁻ has been demonstrated in the 3D structure of [Na(C₂₀H₂₄O₆)(CH₃CN)₂]₂[Mo₆O₁₉] · 4CH₃CN (1). Weak intermolecular forces (C–HO hydrogen bonds) between isopolyanion and crown ether play a significant role in the construction of supramolecular framework in the crystal structure of 1. Compound 1 has been characterized in the solid state by single crystal X-ray diffraction, IR, CHN analysis, and TGA.     

斜轧扩径生产工艺刍议

简述了斜轧扩径工艺的发展过程和应用情况。介绍了斜轧扩径机的结构、轧辊布置及调整方式、特点．以及斜轧扩径的生产工艺流程和变形特点。初步分析了天津钢管集团股份有限公司φ720mm斜轧扩管扩径机组试生产期间的产品质量及影响因素,该试生产结果表明斜轧扩径机可轧制径壁比大于50的薄壁管;生产的部分产品填补了国内空白,产品质量达到或接近国外同类产品的实物质量。     

基于CAD/CAM软件的模具设计与制造

以塑料窗限位块为例,根据塑件的结构特征,利用CAD软件Pro/E进行模具型芯、型腔、标准模架及标准零部件的设计;利用CAM软件Master CAM进行模具型腔的加工。该种方法的应用可以大大提高模具设计效率,缩短模具设计、加工周期。     

电视演播厅布光控制系统设计与应用

在分析电视演播厅舞台灯光布光控制系统技术要求的基础上,提出基于可编程控制器（ PLC）的电视演播厅布光控制系统设计方案。布光控制系统以PLC为控制核心部件,通过人机接口对指定的灯具进行要求的动作控制。设计了布光控制系统的硬件电路和软件部分,并进行了相应的实践应用。应用结果表明,该布光控制系统能够满足电视演播厅舞台灯光丰富多样性布光控制性能需求,系统结构合理,软件模块规范,性能稳定可靠,在电视演播厅布光控制的实践中具有广泛的应用前景。     

Optimization of PCB component placements for the collect-and-place machines

This paper presents two hybrid genetic algorithms (HGAs) to optimize the component placement operation for the collect-and-place machines in printed circuit board (PCB) assembly. The component placement problem is to optimize (i) the assignment of components to a movable revolver head or assembly tour, (ii) the sequence of component placements on a stationary PCB in each tour, and (iii) the arrangement of component types to stationary feeders simultaneously. The objective of the problem is to minimize the total traveling time spent by the revolver head for assembling all components on the PCB. The major difference between the HGAs is that the initial solutions are generated randomly in HGA1. The Clarke and Wright saving method, the nearest neighbor heuristic, and the neighborhood frequency heuristic are incorporated into HGA2 for the initialization procedure. A computational study is carried out to compare the algorithms with different population sizes. It is proved that the performance of HGA2 is superior to HGA1 in terms of the total assembly time.