关键词： 多连杆机械式压力机   Matlab   Solidworks   Adams   动力学分析  

摘要： 针对多连杆机械式压力机,采用模块化方法构建其传动部分数学模型,得到压力机工作机构滑块的运动方程;根据运动方程,利用仿真软件Matlab得出滑块的位移、速度、加速度曲线。用三维软件Soldworks构建传动部分三维模型,应用动力学分析软件Adams对模型进行动力学分析,对比两种结果,得出该结构适用于深拉伸加工工艺,模具在拉伸工作区的冲击很小,满负荷时工作区域长。

关键词： 机械动力设备   完好率:评定方法  

摘要： 机械动力设备的完好率是反映动力设备能否良好运转的一个关键指标。首先对设备完好率的含义及机械动力设备完好率的评定指标进行了阐释,然后详细介绍了机械设备完好率的评定方法。

关键词： 格力   雕塑   巴塞尔   绘画作品   艺术家   机械动力   新现实主义   艺术大师   机器   森林  

摘要： 作为机械动力艺术大师、新现实主义艺术的创建者之一,吉恩·丁格力撼动了20世纪的艺术和雕塑,幽默和达观的个性令他那巨大而古怪、壮观而刺激的机械作品充满诡异色彩。与众不同的少年吉恩·丁格力(Jean Tinguely)1925年生于瑞士弗里堡,3岁时全家迁居巴塞尔。小时侯在酒鬼父亲和痛苦母亲之间饱受折磨,经常跑到巴塞尔附近的森林里躲避。在那他创造了"

关键词： 机械工业联合会   科技进步一等奖   江苏省   科技进步奖   获奖名单   工程学院   科研项目   沥青路面  

摘要： 日前，江苏省机械工业联合会公布了2010年度江苏省机械工业科技进步奖获奖名单，由江苏华通动力重工有限公司和南京工程学院、东南大学联合研发的“沥青路面现场微波热再生养护装备研发与产业化”科研项目成果，喜获江苏省机械工业科技进步一等奖。

关键词： 码垛机器人   机械手   优化  

摘要： 在码垛机器人的设计中,动力分析与结构优化至关重要。本文以某公司生产的基于高速四轴码垛机器人的搬砖机器人的机械手为研究对象,详细分析了机械手的动态载荷。以此为基础,运用有限元分析软件UG Nastran对机械手在搬砖运动的状态进行受力分析,对夹板结构进行了优化和校核,减轻了机械手的重量,降低了生产成本,提高了工作效率。

关键词： Accident prevention   Cutting tools   Definitions   Ergonomics   Forestry   Forestry equipment   Forestry machines   Free cutting devices   Hand operated   Hazards   Health protection   Internal combustion engines   Limbing machine   Mechanical properties   Mechanical testing   Motor-operated   Motors   Noise measurements   Occupational safety   Operational instructions   Portable   Power transmission systems   Protection against danger   Pruning shears   Safety device   Safety devices   Safety of machinery   Safety requirements   Saws   Specification (approval)   Testing   Tree cutting   User information   Wood culture   Wood saws   Woodworking   Workplace safety  

标准号: ISO 11680-2-2011

摘要： ISO 11680-2:2011 gives safety requirements and measures for their verification for the design and construction of portable, hand-held, pole-mounted powered pruners with a back-pack power unit and using a drive shaft to transmit power to a cutting attachment consisting of a saw chain or reciprocating or circular saw blade. Methods for the elimination or reduction of hazards arising from the use of these machines and the type of information on safe working practices to be provided by the manufacturer are specified. ISO 11680-2:2011, together with the relevant sections of ISO 11680-1, deals with all significant hazards, hazardous situations or hazardous events with the exception of electric shock from contact with overhead electric lines (apart from warnings and advice for inclusion in the instruction handbook) and whole-body vibration from the back-pack power unit, relevant to these machines when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer.

关键词： 工程机械   销售市场   菲亚特   汽车行业   发动机   科技管理   动力设备   亚太区  

摘要： 菲亚特（FIAT），对于汽车行业而言，是一个熟悉的品牌。菲亚特发动机，无论是在工业还是汽车领域都有广泛应用。然而菲亚特发动机涉足中国工程机械领域时间并不长。那么菲亚特发动机将凭什么优势切入中国工程机械市场？本刊（CMTM）联合中国工程机械品牌网采访了菲亚特动力科技管理（上海）有限公司亚太区销售市场总监张继文、亚太区高级销售经理龙桓毅、代理商长沙湘菲动力设备有限公司总经理严朝昕。

关键词： Vibration of mechanical beams   Steel beam subjected to fire   Breaking time  

摘要： We numerically study the dynamical behavior of a steel beam under combined effects of ISO fire and transversal mechanical load based on the equation of vibration with explicit inclusion of temperature dependence. The variation of deflection and bending moment with time as well as the variation of breaking time of the beam with the intensity of the load are presented. (C) 2011 Elsevier Ltd. All rights reserved.

关键词： pulse oximetry   plethysmography   cardiac output   stroke volume   waveform analysis  

摘要： Objective: To assess the relation between photoplethysmographically-derived parameters and invasively-determined hemodynamic variables. Design: After induction of anesthesia and placement of a Swan-Ganz CCOmbo catheter, a Nonin OEM III probe was placed on each patient's earlobe. Photoplethysmographic signals were recorded in conjunction with cardiac output. Photoplethysmographic metrics (amplitude of absorbance waveform, maximal slope of absorbance waveform, area under the curve, and width) were calculated offline and compared with invasively determined hemodynamic variables. Subject-specific associations between each dependent and independent variable pair were summarized on a per-subject basis by the nonparametric Spearman rank correlation coefficient. The bias-corrected accelerated bootstrap resampling procedure of Efron and Tibshirani was used to obtain a 95% confidence interval for the median subject-specific correlation coefficient, and Wilcoxon sign-rank tests were conducted to test the null hypothesis that the median of the subject-specific correlation coefficients were equal to 0. Setting: University hospital. Participants: Eighteen patients undergoing coronary artery bypass graft surgery. Interventions: Placement of a Swan-Ganz CCOmbo catheter and a Nonin OEM III pulse oximetry probe. Measurements and main results: There was a positive, statistically significant correlation between stroke volume and width (median correlation coefficient, 0.29;confidence interval, 0.01-0.46;p = 0.034). The concordance between changes in stroke volume and changes in width was 53%. No other correlations achieved statistical significance. Conclusions: This study was unable to reproduce the results of prior studies. Only stroke volume and photoplethysmographic width were correlated in this study;however, the correlation and concordance (based on analysis of a 4-quadrant plot) were too weak to be clinically useful. Future studies in patients undergoing low-to-moderate risk surge

关键词： acoustic impedancemetry   aggregative stability of colloids   dynamics of phase transitions   sensor technologies  

摘要： It has been shown that the dynamics of molecular self-organization of the components of liquids drying in the form of drops on a solid wettable surface contains information about their composition and structure. The physical mechanisms of this phenomenon have been considered. A method of recording this dynamics and retrieving useful information has been suggested. Examples of using this method in medical diagnosis and quality assessment of food products, drugs, and liquids of domestic appliance are given. © 2011 Pleiades Publishing, Ltd.