查询词典 at the cutting edge of

Wire electrode based on the trajectory of the different forms of control, WEDM can be divided into three types: one is shaped by the imitation controlled cutting in line in advance and work to create the same shape by mold, when processing the workpiece at the same time rough and on the mold clamping in the machine tool table, in the process of cutting wire electrode tightly against the mold on the edge of the track for the mobile, thus cutting out and die on the same shape and precision to the workpiece; another One is the electro-optical tracking control, to carry out the cutting line, before the basis of certain parts to enlarge the proportion of drawings depicts an electro-optical tracking map-processing machines will be placed in design stage of electro-optical tracking, tracking platform Photoelectric first line of graphics has always been to follow the track of the Mexican campaign, and then through the use of electrical, mechanical linkage to control the machine tool table, together with the workpiece so相似形wire electrode relative movement, thus cutting out the same shape and design to the workpiece; again a digital control, the use of advanced automatic control of digital technology-driven machine tool in accordance with the pre-processing parameters according to the workpiece geometry pre-processing procedures for the preparation of a good CNC auto-complete processing, the production does not require appearance on board the need to map to enlarge map of the previous two form of control has a higher machining accuracy and a broad range of applications, both at home and abroad more than 95% have adopted WEDM NC.

根据对电极丝运动轨迹的控制形式不同，电火花线切割机床又可分为三种：一种是靠模仿形控制，其在进行线切割加工前，预先制造出与工件形状相同的靠模，加工时把工件毛坯和靠模同时装夹在机床工作台上，在切割过程中电极丝紧紧地贴着靠模边缘作轨迹移动，从而切割出与靠模形状和精度相同的工件来；另一种是光电跟踪控制，其在进行线切割加工前，先根据零件图样按一定放大比例描绘出一张光电跟踪图，加工时将图样置于机床的光电跟踪台上，跟踪台上的光电头始终追随墨线图形的轨迹运动，再借助于电气、机械的联动，控制机床工作台连同工件相对电极丝做相似形的运动，从而切割出与图样形状相同的工件来；再一种是数字程序控制，采用先进的数字化自动控制技术，驱动机床按照加工前根据工件几何形状参数预先编制好的数控加工程序自动完成加工，不需要制作靠模样板也无需绘制放大图，比前面两种控制形式具有更高的加工精度和广阔的应用范围，目前国内外95%以上的电火花线切割机床都已采用数控化。切割属电加工范畴，是由前苏联人发明的，我国是第一个用于工业生产的国家，当时由复但大学和苏州长风机械厂合作生产的这是最早的机型叫复旦型，我们国内在此基础上发展了快走丝系统。欧美和日本发展了慢走系统LS

Based on the relevant movement between hard shaper cutter and grinding wheel, the movements of grinding wheel are studied. The shaping grinding point and the shaping grinding edge are made up with. In order to easily compare when shaping errors and cutting edge"s angles are the most excellent, uniform expressions for convex curved rake face of hard shaping cutter and spatial cutting edge curve are separately developed. The distributions of new profiling cutter"s shaping errors and cutting edges angles are analyzed. The relevant grinding wheel and cam are designed. Due to this paper, a new profiling hard shaping cutter has been manufactured successfully. At last experiments are made to test the performance of hard shaping cutter and all kinds of precision of hard gear.

本文直接从插齿刀与砂轮之间的相对运动关系出发，单独研究砂轮的运动，提出砂轮成形磨削点和砂轮成形磨削刃的概念；分别建立圆柱砂轮和圆锥砂轮磨削后硬齿面插齿刀的波形前刀面方程及空间切削刃方程；为便于比较何种情况下插齿刀的构形误差和切削角度能同时达到最优，分别对磨削五种不同硬齿面插齿刀所用的砂轮进行了廓形设计，并分析了插齿刀的构形误差和侧切削刃切削角度的分布规律；为插齿刀波形前刀面的磨削加工设计了相应的凸轮，用所设计的凸轮和近似的砂轮成功地制造出新构形法硬齿面插齿刀；最后进行插齿加工试验，检验新构形法硬齿面插齿刀的抗崩刃能力、耐磨性及被加工硬齿面齿轮的各项精度。

In still a further feature of the invention, the windshield has a vision area having a top edge and a bottom edge, and the coating has a top edge adjacent the top edge of the vision area and a bottom edge adjacent the bottom edge of the vision area.

在本发明的另一个特征中，所述挡风玻璃具有一个视区，所述视区具有顶边和底边，所述涂层具有毗邻所述视区顶边的顶边以及毗邻所述视区底边的底边。

By comparing the common edge detection algorithms, the magniloquent Kirsch edge detection algorithm is selected to process the result of background subtraction. The result of edge detection is denoised by mathematical morphology method. Shadow edge restrained arithmetic and detection-line-based background updating method are presented. Shadow edge restrained arithmetic reduces vehicle shadow edge efficaciously. Background updating precision is improved by presented background updating method.

在处理过程中，对常用的背景差方法进行了改进，有效的保留了车辆目标信息；通过对常用的边缘检测方法比较，选用了突出边缘的Kirsch边缘检测方法对背景差后的图像进行了边缘检测；使用形态除噪算法对边缘检测的结果进行了噪声去除；提出了阴影边缘去除算法和基于检测线的背景更新方法，阴影边缘去除算法有效的抑制了车辆阴影边缘，背景更新方法则提高了背景更新的精度。

Based on the mechanism of nitrogen transfer among different rice leaves, red edge slope and red edge position of the most upper and the 3rd expanded leaves were investigated specially. And using the two red edge parameters (red edge slope and red edge position), a new vegetation index (red edge curve shoulder angle vegetation index, abbreviation RSAVI) was calculated to detect rice nitrogen nutrition status.

基于氮素在水稻不同功能叶片之间运转规律的机理，文章重点分析了第一和第三完全展开叶红边斜率和红边位置的变化，并基于红边位置和红边斜率构建了一个新的植被指数（命名为&红边曲线肩夹角植被指数&，简称为RSAVI）监测水稻氮素营养状况。

Function that the cutting blowpipe raises automatically following the uneven steel plate when cutting, ensure that the distance between cutting blowpipe and the steel plate are consistent when cutting, thereby guarantee cutting mass.

具有切割时割炬随钢板高低不平而自动调高的功能，保证切割时割炬与钢板的距离一致，从而保证了切割质量。

Wood cutting can be divided into cont inous cutting,high frequency cutting disjointedly and low frequency cu tting disjointedly according to length of a continous cutting time and proportion of cutting time to all time.

根据一次连续切削延续时间的长短及切削时间占总时间的比例，可将木材切削分为连续切削、高频率断续切削和低频率断续切削。

Zeng Haisheng told 10-year-old mother to learn paper-cutting, and later he became the teacher of paper-cutting culture has some thinking, and thinking themselves into the traditional paper-cutting, the use of euphony, symbolic, metaphor and other means to show their the pursuit of a better life and hope, thereby increasing the aesthetic value of paper-cutting works, the beginning of the traditional paper-cutting innovation.

曾海生十来岁就跟母亲学剪纸，后来他当了老师，对剪纸有了一些文化的思考，并将自己的思考融入传统的剪纸中，用谐音、象征、隐喻等手法表现出自己对美好生活的追求与企盼，从而提高了剪纸作品的审美价值，传统剪纸开始了创新。5年前曾海生退休回到家，看到村里有不少父母外出务工的留守孩子，就把他们组织起来，把自己几十年积累的剪纸技艺和盘托出，教授弟子。

Trade and Long" brand series products include: automatic dual-precision four-post, unilateral hydraulic cutting machine, precision four-post Hydraulic Cutting Machine, Gantry Hydraulic Cutting Machine, Hydraulic Plane Cutting Machine, Rocker hydraulic cutting machine, such as the top ten series more than 60 varieties, the product best-selling domestic and international markets."

"贸隆"牌系列产品涵括：精密四柱式全自动双、单边液压裁断机、精密四柱式液压裁断机、龙门式液压裁断机、平面式液压裁断机、摇臂式液压裁断机等十大系列六十多个品种，产品畅销国内、国际两大市场。

The wood of China fir and Taiwan zelkova were used for cutting test. Cutting conditions of the tool were rake angle 35°, sharpness angle 29° and clearance angle 26°. Five depths of cut were laboratory fraise for metal cutting. The cutting force measurements, based on the cutting surface of the test material, were performed by a quartz piezoelectric three component dynamometer.

采用杉木与台湾榉之气乾材为试验材料，切削试验以高速度钢材质之平刀进行二次元纵切削(90-0)之平削试验，切削条件中刀具斜度角为35°，刀端角为29°，余隙角为26°，切削深度为0.05、0.1、0.2、0.3与0.5 mm，切削速度为1.1cm/s。

Alternatively, the con- trollers can use the synchronous rectifier itself or loss- less inductor current-sensing methods to provide overload protection with lower power dissipation.

另外，康威特罗勒斯可以使用同步整流器本身或亏损减少电感电流检测方法，以提供低功耗过载保护。

Mr. Dauber's other Schatz hangs in his home movie studio.

多伯把沙兹的另一件作品挂在家里的电影室。