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2017年9月26日晚间,中山大学孙逸仙纪念医院林副主任医师及赖宇主治医师为63岁的蔡先生进行了肠镜下直肠肿物黏膜下剥离术,这是广东省第一例使用Clutch Cutter电剪刀(又名“一次性使用剪刀钳”)进行内镜直肠肿物黏膜下剥离术。
Attrition of material during cutter suction dredging and pipeline transport: a summary
Attrition material during cutter suction dredging pipeline transport a summary
2013/9/13
In the dredging industry, it is advantageous to have advanced knowledge of the expected particle size distribution (PSD) of material that has been subject to dredging processes. During dredging, the r...
Dynamics Modeling and Simulation for Main Drive System of Automatic Cutter
Cutter Machine Dynamic Balance Dynamical Modeling Main Transmission
2011/12/15
Aiming at the Multi-layer leather cutting machine,for the more thicker material paved on the table,the cutting resistance are increased and the cutter are to be need much more longer,this caused the c...
弧面凸轮廓面非等径加工的刀位控制方法(Cutter Location Control Method for Unequal Diameter Machining of Globoidal Cam Surface)
弧面凸轮 非等径加工 法向误差 刀位优化
2010/12/29
刀位补偿法是非等径加工弧面凸轮廓面最常用的方法,提出了刀位补偿法法向误差计算的方法和一种刀位自适应补偿优化算法,即对于任意凸轮转角,以最大法向误差最小为目标函数,进行刀位优化,寻求对应的最佳补偿点和补偿量,使刀位根据加工误差自适应地柔性补偿。通过实例验证了法向误差计算式的有效性,并得出了滚子和刀具的半径差是最佳补偿量,而最佳补偿点位置并不固定的结论,结果表明所提出的刀位优化算法正确有效,可显著减小...
从确定设计技术参数、设计技术路线、关键结构设计计算等方面研究了全自动植物纤维餐饮具除边机。采用气缸驱动回转盘间歇转动的五工位设计、行星齿轮布置结构、柔性仿形除边刮刀等装置,实现制品在转盘公转换位和自转运动中完成全自动除边过程。应用Pro/E软件对除边机整机三维实体进行模拟。工作循环采用全自动闭环反馈控制,并在样机上验证控制系统的准确度。试验结果表明,除边机适用于植物纤维餐饮具行业。
针对我国西部地区沙生灌木平茬复壮工作迫切,人工平茬难、劳动强度大、效率低等问题,以及为荒漠化防治实现机械化技术,设计了具有铰接式车体机构的自走式灌木平茬机,实现扭腰式扇面摆动切割作业。提出了人工操纵与机具自适应仿形相结合的纵横向仿形收割沙生灌木方法,并对柠条、沙柳进行了收割试验。试验结果为:柠条漏割损失率小于等于0.8%,割茬破损率为2.9%;沙柳漏割损失率小于等于0.8%,割茬破损率为2.5%,...
Research of thermal processes in cutter edge made of HS 3-1-1,5 low-alloyed high-speed steel
High-speed steel Temperature field Thermal conductivity
2010/1/11
The physical and mathematical description of tools wear during technological process and need to the enlarge tool life require knowledge of material data, e.g. density, specific heat and coefficient o...
Modeling Cutter Swept Angle at Cornering Cut
Intelligent design cavity layout design injection mould design case-based reasoning
2009/8/19
When milling concave corners, cutter load increases momentarily and fluctuates severely due to concentration and uneven distribution of material stock. This abrupt change of cutter load produces undes...
Inverse offset method for adaptive cutter path generation from point-based surface
Inverse offset method point-based surface machined surface error
2009/8/19
The inverse offset method (IOM) is widely used for generating cutter paths from the pointbased surface where the surface is characterised by a set of surface points rather than parametric polynomial s...
整株秸秆还田机刀轴载荷谱编制与疲劳寿命估算 Load Spectrum Compiling and Fatigue Life Estimation of the Cutter Shaft of the Whole-straw Recycling Machine
整株秸秆还田 刀轴 弯扭载荷谱
2009/5/18
利用DH5937应力测试系统和传感器技术,对刀轴的弯矩和扭矩进行了模拟实测,编制了刀轴弯扭复合载荷谱。通过迈内尔(Miner)线性累积损伤理论推导出刀轴在复合应力作用下的疲劳寿命估算式,并利用刀轴弯扭载荷谱估算出刀轴的疲劳寿命,较设计寿命提高了433h。
MEASURES AND THEIR DIMENSION SPECTRUMS FOR COOKIE-CUTTER SETS IN R~d
Cookie-cutter sets Hausdorff
2007/12/10
The characteristics of cookie-cutter sets in R~d are investigated. A Bowen's formula for the Hausdorff dimension of a cookie-cutter set in terms of the pressure function is derived. The existence of s...
Missouri-Made Products Join the Shelves of Price Cutter Plus in Springfield
Cutter Springfield
2006/12/22
Silicon dioxide or silica is the earth’s most abundant mineral. The primary pulmonary illness attributable to silica exposure is silicosis, which is observed in three forms: classic, accelerated and a...