关键词： 中国机械工业联合会   运行情况   中国汽车工业协会   新闻发布会   副会长   信息发布   经济运行   机械行业  

摘要： 2018年8月7日，2018年上半年机械行业经济运行信息发布会在中国机械工业联合会总部会议室举行。发布会由中国机械工业联合会副秘书长兼统计信息部主任赵新敏主持。中国机械工业联合会执行副会长陈斌，中国机械工业联合会副会长、中国汽车工业协会常务副会长董扬出席本次新闻发布会并回答了记者提问。

关键词： 机械工业   综述   业务收入   同比增长   产品   产量  

摘要： 2018年1-6月机械工业实现主营业务收入11.24万亿元,同比增长10.41%;实现利润总额7615亿元,同比增长6.73%.两项指标均实现了稳定增长.上半年机械工业重点监测的120种主要产品中,产量同比增长的产品有76种,占比63%,比上年减少18种;产量同比下降的产品44种,占比37%,比上年增加19种.

关键词： 信息化技术   生命化课堂   教学大赛  

摘要： 在教学能力大赛的背景下,促进课程数字化资源的开发,并在推广使用过程中不断优化课程资源,在“未来教室”平台上打造“生命化课堂”。文章以“机械手驱动技术”课程为例,对“生命化课堂”的资源建设进行了阐述分析。

关键词： 工程机械   液压系统   动力匹配   控制技术  

摘要： 目前工程机械液压动力系统的优化及匹配是通过技术与理论相互结合的高级系统功能实现的。在我国机电一体化不断发展的过程中,液压系统工程机械动力匹配及控制技术都在不断的提高。基于此,大量的机械液压系统动力匹配及相应的控制技术也不断复杂,并且需求也在不断的增加,所以,对工程机械液系统动力匹配和控制技术的设计了进行全面分析。

关键词： 中国国际纺织机械展览会   装备技术   智能化   ITMA   个性化定制   亚洲   中国制造   智能制造  

摘要： 《中国制造造2025》指出，智能制造将成为中国制造的主攻方向。智能制造的需求也推动了国产纺织装备技术的进步，在国家工信部、国家发改委、国家科技部等部委的支持下，我国纺织工业先后建立了数字化生产车间和服装生产个性化定制、针织品智能柔性定制与生产一体化等试点示范生产线。目前，纺织行业已从单机的智能化向系统的数字化、自动化、智能化发展。

关键词： matlab   机器人   动力学方程  

摘要： 依托matlab符号函数工具箱,编写了用于计算平面任意多连杆机器人动力学公式的程序.并以七连杆机器人为例.由本程序计算得到七连杆机器人的动力学公式,并作了数值仿真,仿真的结果与实际较为符合.本方法简便、高效,与现代计算机技术的发展契合,也为后续的机器人控制奠定基础.

关键词： 机械设计   非线性动力学   动态设计  

摘要： 现代机械设备在社会生产领域的应用,具有着提升人们工作效率的作用。机械设计与机械加工制造的合理性与科学性之间有着较为密切的联系。本文主要从非线性动力学的研究现状入手,对机械设计中的非线性动力学与动态设计问题进行了探究。

关键词： 哈尔滨理工大学   工程学院   高精度加工   切削过程   智能化   院长   机械   科研特色  

摘要： 请您简单介绍一下哈尔滨理工大学高效切削及刀具国家地方联合工程实验室目前主要的研究内容与科研特色.

关键词： epoxy   triblock copolymer   PPG-b-PEG-b-PPG   mechanical properties  

摘要： The aim of this study was to evaluate the role of different poly(ethylene glycol):poly(propylene glycol) (PEG:PPG) molar ratios in a triblock copolymer in the cure kinetics, miscibility and thermal and mechanical properties in an epoxy matrix. The poly(propylene glycol)-block-poly(ethylene glycol)-block-poly(propylene glycol) (PPG-b-PEG-b-PPG) triblock copolymers used had two different molecular masses: 3300 and 2000 g mol(-1). The mass concentration of PEG in the copolymer structure played a key role in the miscibility and cure kinetics of the blend as well as in the thermal-mechanical properties. Phase separation was observed only for blends formed with the 3300 g mol(-1) triblock copolymer at 20 wt%. Concerning thermal properties, the miscibility of the copolymer in the epoxy matrix reduced the T-g value by 13 degrees C, although a 62% increase in fracture toughness (K-IC) was observed. After the addition of PPG-b-PEG-b-PPG with 3300g mol(-1) there was a reduction in the modulus of elasticity by 8% compared to the neat matrix;no significant changes were observed in T-g values for the immiscible system. The use of PPG-b-PEG-b-PPG with 2000 g mol reduced the modulus of elasticity by approximately 47% and increased toughness (K-IC) up to 43%. Finally, for the curing kinetics of all materials, the incorporation of the triblock copolymer PPG-b-PEG-b-PPG delayed the cure reaction of the DGEBA/DDM (DGEBA, diglycidyl ether of bisphenol A;DDM, Q3-4,4'-Diatninodiphenylmethane) system when there is miscibility and accelerated the cure reaction when it is immiscible. All experimental curing reactions could be fitted to the Kamal autocatalytic model presenting an excellent agreement with experimental data. This model was able to capture some interesting features of the addition of triblock copolymers in an epoxy resin. (C) 2018 Society of Chemical Industry

关键词： Secretion clearance   mathematical model   dynamic characteristics   experiments   simulation  

摘要： Secretions in the airways of mechanical ventilated patients are extremely dangerous to patients' health. In recent studies, the continuous constant airflow is adopted, however, it is not consistent with a clinical situation. To study respiratory airflow dynamic characteristics with secretion in the airways, a mathematical model based on clinical mechanical ventilation is established in this paper. To illustrate the secretion's influence on the airflow dynamics of mechanical ventilated respiratory system, three key parameters which are cross section area ratio of secretion/ pipe, air-secretion contact area, and secretion viscosity are involved in the study. Through the experimental study, the accuracy and dependability of the model are confirmed. By the simulation study, we find that: based on the model which combines two airways and two model lungs, when one of the airways was covered with secretion, the maximum pressure of the model lung which is attached to the end of this airway maintains constant when the cross section area ratio is less than 66 percent, and then it tends to decline sharply with the ratio increasing, but it remains constant with the augment of air-secretion contact area, the maximum flow declines both with the increasing of cross section area ratio and air-secretion contact area. Furthermore, as for the other airway, the maximum pressure of the model lung has no significant changes with the augment of area ratio and air-secretion contact area, however, along with the increasing of area ratio and air-secretion contact area, the maximum flow rises up. Moreover, the secretion viscosity has barely any influence on airflow dynamics. According to our analysis results, we conclude that the cross section area ratio of secretion/pipe has bigger influence on airflow dynamic characteristics than air-secretion contact area and secretion viscosity. This paper lays the foundation for the further study of efficacy and safety in mechanical ventilation and the s