查询词典 cutting

The main research content is: Using the experimental of cutting force and roughness of high speed face milling cutter and high speed end milling cutter mill aluminium alloy and cast iron, analyze the rules of the high speed milling velocity, feed rate per tooth, milling depth and milling width to high speed processing. Use multiple linear regression method, set up surface roughness and the cutting force fluctuation models. Certify the regression model notability, and provide a reliable guarantee for the accuracy of function optimization. Based on the targets of productivity, manufacturing cost, surface roughness, cutting force fluctuation optimization model, according to research of the high speed milling parameters selecting restrict of work piece, machine, tool and safety, set up high speed milling parameters multi-object optimization system.

本文以已有的高速铣削机理及高速刀具技术研究成果为基础，结合高速铣削试验，进行了基于遗传算法的高速铣削参数优化研究与系统开发，主要的研究内容为：通过高速面铣刀和高速立铣刀加工铝合金和铸铁等材料的切削力和表面粗糙度试验，进行了铣削速度、每齿进给量、铣削深度和铣削宽度对高速铣削加工过程影响的研究；采用多元线形回归的方法，建立了切削力及其振幅和表面粗糙度模型，并对模型的显著性进行验证，为高速铣削参数优化模型的建立奠定了基础。

At the 80% field capacity, root cutting did not significantly affect WUE for grain yield of millet; at the 50% field capacity early moderate root cutting significantly improved the WUE for grain yield, while the late root cutting did not show obvious improvement.

在高水条件下，伤根处理对谷子籽粒产量WUE影响不显著；而在低水分条件下，前期适度伤根能使谷子籽粒产量WUE显著提高，而后期伤根处理的籽粒产量WUE提高不显著。

In order to raise the rate of the rootage and survival of the cutting, save labor-power, reduce labor intensity and cut down the cost,we have developed the ecological environment auto control system for cutting transplant in the green house .It is able to control the greenhouse environment for the whole process of the cutting transplant and to satisfy the necessary condition of it.

为提高扦插苗木的生根率和成活率，节省人力，减少工人的劳动强度，降低育苗成本，我们研制了扦插育苗大棚生态环境自动化调控系统，实现了整个育苗过程大棚环境的自动化调控，满足了扦插苗木对环境的要求。

And can be cut, and a variety of materials, precision cutting demanding the ability to use pulse laser cutting die computer printer and the computer automatically scimitar machine, can be used in cutting die plus scimitar machine cutlasses, fast, and accurate.

并可切割多种材料，而且，对精度要求较高的切割，还可采用脉冲切割将激光模切版的电脑绘图机与电脑自动弯刀机连在一起，可在切割模切版的同时，用弯刀机弯刀，又快捷，又准确。

Ln the memory of dynamic data system there are 500,000 measured data. This paper deals mainly with the change of cutting area in self-excitation qualitatively and quantitatively. The changes of position of cutting edge and cutting area are indicated with graphic method. The m...

文中重点叙述了利用上述DDS对自激振动时的切削面积变化规律进行定性与定量分析研究：利用计算机对切削刃位置和切削面积变化用图示法使之"可视化"：通过统计法建立起来的切削面积数学模型，可对动态切削面积进行实时解析计算，最后通过均方差分析，对4种算法进行比较，提供了实用而准确的计算方法与结果。

Li character cutting tool factory production operation big Li sign manual cutting tool: Cut the knife for scraping hides, PVC to shear the cloth knife, the even knife for scraping hides, to shear the knife for scraping hides, the scissors, the burr, the thimble, nail fur Qian, the nail skin to open, begins in 1995, obtained the customer high praise by the sharp durable cutting tool quality!

产品信息：裁皮刀；平皮刀；pvc布刀；割布刀；磨石；剪刀；钉皮钳；钉皮起；快刀；笨刀；五金；刀具；皮草刀具；皮匠刀；皮草加工用具；企业介绍：李字刀具厂生产经营大李牌手工刀具：裁皮刀、PVC割布刀、平皮刀（笨刀、割皮刀、织地毯刀、剪刀、磨石、顶针、扁嘴钳、起钉器，始于1995年，以锋利耐用的刀具质量得到了客户的好评！

According to the characteristic of CNC plasma cutting machine it could improve the process quality of cutting piece in effect for choosing proper technics, for example, cutting section point, aspect, sequence, speed etal during the period of processing, and elaborating towards the distortion control of single side piece, slightness piece, profiled piece and particularity piece at the same time.

根据数控等离子切割机的特点，在加工过程中正确选择切割的起点、切割方向、切割顺序、切割速度等工艺，可以有效提高切割件的加工质量，同时对单边工件、细长件、异型件以及特殊件的变形控制进行了详细地阐述。

The characteristics of cutting edge and cutting advantages for a new type of ball end mill with space curve cutting edge is introduced,the calculating method of curve geometric parameters is explained,and the manufacture technology is presented.

介绍了一种新型空间曲线刃球头铣刀的刃形特征和切削优点，详细分析了其空间几何参数的计算方法，简要说明了其制造工艺。

School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China）Abstract: Mathematic model of the tiny terrain covered cobalt-rich crust and the cutting process of mining head's cutting tooth were established by considering the force of sea water, and simulation software was developed by GUI tool of Matlab software to study the distributive properties of maximum load of the cutting tooth.

摘 要：考虑海水力的作用，建立深海钴结壳微地形的数学模型和采矿头截齿切削过程的数学模型，应用Matlab软件GUI工具编制相应的仿真程序，并通过实验验证仿真模型的正确性和仿真软件的工程有效性。

VTK is an object-oriented universal class library, which is widely used in science and engineering field. In this paper, the visualization pipeline of VTK is introduced, and it is discuss that principles and implemental methods of two interactive cutting. This technique could be applied to medical teaching, scientific research and clinical diagnosis where virtual cutting is needed, finished the functions of 3D reconstruction and virtual cutting, thereby satisfy requirements of clinic and research.

VTK是面向对象的通用可视化类库，在科学和工程界有着广泛的应用，文中主要介绍交互式切割的意义以及VTK的可视化开发流程，并在此基础上讨论了两种交互式切割方式(Cropping和Clipping)的原理和实现方法，提出将其应用于医学教学、科研和临床诊断的虚拟切割中的设想，完成三维重建与虚拟切割的功能，从而满足临床与科研的需要。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。