带有热空气硫化系统的共挤出设备

德国Harburg Freudenberger机械制造有限公司介绍了有关带热空气硫化系统的共挤出设备,该设备用于生产橡胶密封制品。全套设备包括橡胶挤出设备和热空气硫化设备两大部分。其中橡胶挤出设备包括一台挤出硬质胶用的螺杆直径为90mm的冷喂料真空排气挤出机、一台挤出海绵胶用的螺杆直径为60mm的冷喂料挤出机及一个直角机头：热空气硫化设备包括一个热空气硫化系统和一个履带式接取装置（图1）。     

挤出滚圆工艺及其设备选型要素探析

介绍了挤出滚圆工艺所用的不同设备,从设备选用原则与工作流程两个方面,探讨了挤出滚圆工艺的设备配置,同时阐述了特殊物料的挤出滚圆工艺,简要分析了挤出滚圆工艺中的实验系统、中试系统、大生产自动生产线的设备选型,对拟采用这一工艺进行生产的相关企业具有极强的指导意义。     

配有简化挤出机头的复合挤出设备

1 前言 大家所熟知的挤出概念是，采用复合挤出设备挤出轮胎有关部件。一般来说，复合挤出设备是将两台挤出机以所谓猪背式复合形式排列的。使用复合挤出机可挤出多个轮胎部件，并将不同的胶料通过复合挤出机头而组合在一起。     

生产轮胎半成品用新型挤出设备

Krauss Maffei Beratorff有限公司为生产轮胎部件新开发出用5台挤出机共用一个复合挤出机头的多复合系列挤出设备。该公司提供的多复合挤出设备，适用挤出轮胎不同的部件。     

挤出设备的性能与操作对型胶质量的影响

简要介绍了胶料挤出的工作原理及工艺过程,对设备的配置及操作对型胶挤出质量的影响进行了分析,并对挤出过程中常见的质量缺陷、造成原因以及解决措施提出了建议,认为规范的操作可以在一定程度上弥补设备性能的不足。     

挤出加工设备

Guill Tool＆Engineering公司开发的2000系列加工设备代表了新一代的塑料和橡胶挤出设备,该设备能够通过减少废料节省大量的人力和财力。该公司称,卓越的产品精度和稳定的产品生产流程是该设备与市场上其他设备相比最大的优势。2000系列挤出加工设备系统能够向用户提供良好的物料分布和一致性,     

热熔挤出药物复合技术及其装备展望

从挤出技术及其设备的介绍入手,阐述了热熔挤出的加工进程,从控制停留时间、自洁功能和剪切均一、捏合与混合作用、可扩展性4个方面,对热熔挤出技术的改进进行了探讨。     

轮胎轮廓的挤出

德国Troester公司提供了轮胎轮廓挤出新型设备,根据用户要求的标准设计系统涉及到轮胎轮廓的制造。根据该公司有一个可靠的挤出伙伴和一些重要轮胎公司提供轮胎软件的先决条件。Troester公司改进的新型挤出生产线适用于挤出胎面、胎侧、内衬层、三角胶条及其他制品等。     

木塑材料生产设备的特性介绍

木塑复合材料挤出工艺的加工方式表面上与塑料加工方式基本一样，主要设备似乎也大致相同，但实质上差别很大。目前可用于木塑复合材料挤出成型的设备主要有双螺杆挤出机和单螺杆挤出机。     

中国将引领亚太地区塑料机械市场发展

近两年来，我国塑料挤出机市场有了不小的前进与突破，在我国塑料机械市场中，挤出机作为重要加工设备，发展前景非常乐观。随着全球建筑市场的持续发展，将会拉动对塑料管材、壁板等挤压制品的需求，进而推动挤出设备的需求增长。因此，预计全球挤出设备需求，将超过其他类型的塑机产品。     

PATH FOLLOWING GPS-BASED CONTROL OF SMALL-SIZE ROBOTIC UNMANNED BLIMP

Robotic unmanned blimps own an enormous potential for applications in low-speed and low-altitude exploration,surveillance,and monitoring,as well as telecommunication relay platforms. To make lighter-than-air platform a robotic blimp with significant levels of autonomy,the decoupled longitude and latitude dynamic model is developed,and the hardware and software of the flight con-trol system are designed and detailed. Flight control and navigation strategy and algorithms for way-point flight problem are discussed. A result of flight experiment is also presented,which validates that the flight control system is applicable and initial machine intelligence of robotic blimp is achieved.     

RLS and LMS blind adaptive multi-user detection method and comparison in acoustic communication

RLS and LMS blind adaptive multi-user detection algorithm and multi-user detector was proposed to solve the problem of multi-user signal detection problem encountered in underwater acoustic communication networks.In simulation analysis,RLS and the LMS blind adaptive multi-user detector were designed and tested for synchronous and asynchronous multi-user communication process.The results of SIR comparison and MMSE comparison show that,both of the two methods can realize blind adaptive detection when any user change in multi-user communication,during this process,the training communication sequences are not needed.The RLS algorithm has about 5 dB higher in SIR compared with LMS algorithm,and the convergence velocity of RLS algorithm is also higher than LMS algorithm when the communication users change.RLS algorithm has better ability in multi-user detection than that of LMS algorithm,and it has great attraction and guiding significance for solving the problem of multiple access interference(MAI) in multi-user communication.     

共融机器人重大研究计划研究进展

“共融机器人基础理论与关键技术研究”重大研究计划,聚焦“刚-柔-软机构的行为顺应与可控性”、“人-机-环境多模态感知与自然交互”以及“机器人群体智能与操作系统架构”三个科学问题,主要面向智能制造、医疗康复、国防安全和学科前沿四个重点方向,实施四年来取得了长足进展,构建机器人与人、机器人与环境、机器人与机器人交互的共融机器人研究体系,推动了工业机器人、服务机器人和特种机器人领域的理论和技术发展,相关科研成果为我国高端制造、康复医疗、国防安全等国家重大需求提供了坚实的理论和技术支撑。对在该重大研究计划支持下所取得的有关共融机器人的主要研究进展进行概述,内容涵盖“与环境共融的加工制造机器人”、“与人共融的康复辅助机器人”、“机器人间共融的群体智能与操作系统”以及“共融机器人前沿：新方法、新原理和新概念”,以此给出后续的重点研究方向和建议。     

工业机械手运动学仿真

使用Pro/Engineer建立了工业水平多关节机械手3D模型,并使用Adams作为仿真工具,实际分析了机械手的运动学和动力学特征:介绍了机械手设计的过程与方法,取得了优化的3D设计参数,为3D建模与优化提供了一种实际方法.     

Cell adhesion in renal tubular epithelial cells: Biochemistry,biophysics or both

Changes in cell-cell and cell-substrate adhesion markers are increasingly used to characterize disease onset and progression. However, these relationships depend on both the biochemical and molecular association between cells and between cells and their extracellular matrix, as well as the biophysical and mechanical properties orchestrated by cytoskeletal, membrane and matrix components. To fully appreciate the role of cell adhesion when determining normal physiology and the impact of disease on cellular function, it is important to consider both biochemical and biophysical attributes of the system being investigated. In this short viewpoint we reflect on our experiences assessing cell-cell and/or cell-matrix interactions in renal tubular epithelial cells.     

基于FPGA的FTIR光谱仪采集系统的设计

为了满足人们对于食品药品安全检测快速便携的需要,团队设计一种高速便携,延时低、精度高的新型FTIR光谱仪。光谱采集系统分为上位机和下位机2部分,系统的上位机软件设计是采用跨平台的C++图形用户界面应用程序,该框架(QT Creator)是由编程实现的,下位机的光电部分采用了MEMS微镜使仪器小型化,而下位机采集部分控制主板使用了ZYBO。使用了DAC驱动动镜移动以及ADC用于参考光和样本光数据的同步采集,进而利用多个串口实现了与上位机的完成指令控制以及采集数据传输。低波特率串口用于接收上位机控制指令。2个高波特率串口发送FIFO缓存的光谱数据。经试验验证采集系统的ADC、DAC及UART的时序控制满足了高速高效的需求。但是在便携上可进一步提高,下一步考虑通过利用Linux将上位机部分移植ZYBO内。采集控制设计完全使用了verilog代码进行了仿真与实测,发挥了FPGA的灵活特性,利用例化法提高了采集速率。     

Semiautomated methods for cancellous bone histomorphometry using a general-purpose video image analysis system

Semiautomated methods are used to measure elongated, curved and complex branching profiles and isolated perimeter segments in monochrome video images with a general-purpose analysis system. These methods are used to make the major primary measurements of bone histomorphometry. Accuracy and reproducibility of the image acquisition, processing and measurement system is documented by measuring a semicircular standard of known dimensions. Semiautomated applications of the Ar/Le method for measuring areas and perimeters, and calculating lengths and widths of osteoid seams, lengths of mineralization labels and mineral apposition rate, wall width, indirect measurements of eroded, osteoclastic and osteoblastic perimeters without tracing, and measurement of mineralized or total cancellous bone area and perimeter gave values comparable to measurements of the same parameters by tracing or grid counting techniques with equal or better reproducibility and much greater efficiency. Intraindividual variation in measuring multiple bone biopsies was comparable to that reported with current standard methods. Major sources of variability for semiautomated methods were image magnification and selection of profile edges by thresholding, and sources of variability for manual methods are image magnification, numbers of orthogonal intercepts, tracing speed and accuracy of the algorithm used to measure traced pixels. Semiautomated methods are accurate, reproducible and rapid methods suitable for bone histomorphometry.     

HPLC及LC-MS技术在低聚糖检测中的应用

目的介绍HPLC以及LC-MS技术在低聚糖检测中的应用。方法对近十余年国内外发表的具有代表性的相关文章进行分析、整理和归纳。结果 HPLC可通过选用不同的分离模式、结合多种检测方法满足不同性质低聚糖的分离、分析、检测要求;HPLC和MS联用又将极大地提高分离分析效率。结论 HPLC及LC-MS技术具有灵敏度高、选择性好、应用范围广等优点,是目前低聚糖检测分析的主要方法;随着HPLC和LC-MS技术的日臻完善,它们在低聚糖检测分析中的应用将更为广泛。     

ESTABLISHMENT OF 3D FEM MODEL OF MULTI-PASS SPINNING

In order to improve the computational accuracy and efficiency,it is necessary to establish a reasonable 3D FEM model for multi-pass spinning including not only spinning process but also springback and annealing processes.A numerical model for multi-pass spinning is established using the combination of explicit and implicit FEM,with the advantages of them in accuracy and efficiency. The procedures for model establishment are introduced in detail,and the model is validated.The application of the 3D FEM model to a two-pass spinning shows the following:The field variables such as the stress,strain and wall thickness during the whole spinning process can be obtained,not only during spinning process but also during springback and annealing processes,and the trends of their distributions and variations are in good agreement with a practical multi-spinning process.Thus the 3D FEM model for multi-pass spinning may be a helpful tool for determination and optimization of process parameters of multi-pass spinning process.     

机械设计制造中机电一体化的应用研究

我国的科学技术飞速发展,在社会各个行业领域中均得到了广泛的普及和运用,机械设计制造业中加大了对机电一体化的探索和研究,提高了机械设计制造的整体水平和生产效率。机电一体化直接影响着机械制设计制造的综合水平和最终效率,实现了信息、机械、电子等技术的有机融合。本文对机械设计制造中运用机电一体化的优势进行了探讨,结合机械设计制造中机电一体化技术分析,提出了机械设计制造中机电一体化技术应用研究。