On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland.
在某些地方，特别是在南美洲，稀树草原的形成似乎与频繁地砍伐和焚烧潮湿的森林作为牧场有关。
Most notably, they found that very high doses of antioxidant polyphenols shut down and prevent cancerous tumors by cutting off the formation of new blood vessels needed for tumor growth.
他们发现高剂量的抗氧化多酚物质由于通过切断肿瘤生长所需要的新血管形成来减少和预防肿瘤发生而具有明显的治疗作用。
Cutting gas is to ensure that the formation of plasma jet, and to ensure that remove the molten metal oxides and incision.
切割气体既要保证等离子射流的形成，又要保证去除切口中的熔融金属和氧化物。
Figure 3-2 illustrates the necessary relationship between cutting tool and the workpiece for chip formation in several common machining processes.
图3 - 2说明了在一些普通切削成型加工工艺中，切削刀具和工件之间必要的关系。
Through inducing and analyzing the formation theory of friction, the article advances a new concept that the metal cutting force equals the friction of the tool and workpiece.
通过对摩擦力形成理论的归纳与分析，提出了金属切削力等效于刀具—工件副间摩擦力的新概念，由此导出了计算切削颤振系统阻尼系数的方法及相应结论。
In this paper, some questions such as metal cutting process and machining, chip formation and the function of cutting tool on cutting process have been studied, and some views were put forward.
分析研究了金切削中切削过程与切削加工，切屑形成与刀具在切屑形成过程中的作用。
The achievement of its techniques and the formation of its artistic schools can be seen hath in the cutting and in the calligraphy.
其技法演变和艺术流派的形成，主要反映在刀法和书法两个方面。
Finally, the influence of cutting parameters and tool wear on burr formation are studied through the experiment of machining micro-flute.
最后，本文针对微槽切削加工过程，分析了切削参数和刀具磨损对工件毛刺形成的影响。
Universal decimal classification - English full edition - working, machining with chip formation - cutting, grinding, sheet working etc.
国际十进分类法。全英文版。切屑成形机械加工。切削磨削钣金加工等。
While drilling in the same formation with the same drilling parameters, the penetration rate of bits of the same degree of wear depends mainly on their cutting structures.
在地层、钻井参数和钻头新度相同的情况下，钻头机械钻速的快慢主要取决于钻头齿面结构是否合理。
It is because the accumulated metal can be lumped in front of a discontinuous chip, a bue and a rounded cutting edge of a tool hence the formation of scale on the occasions.
节状切屑、积屑瘤和切削刃钝圆之所以能导致鳞刺，完全是由于在它们的前方都能形成层积金属。
The formation of the fatigue cracks and the thermally induced cracks are mainly responsible for the failure of the ceramic tool materials under various cutting conditions.
在不同的切削条件下，疲劳裂纹和热裂纹是造成刀具材料失效的主要原因。
The fiber formation regions are studied in mechanical chatter cutting method in which short metal fibers are machined.
本文研究了机械振动切削法制造金属短纤维的生成域。
However, only the formation of cross-cutting plant fiber paper, there is a non-uniform density distribution, the surface is not smooth, highly absorbent and so on, can not be used in the printing.
然而仅用植物纤维相互交织形成的纸张，存在着密度分布不均匀、表面不平整、吸水极强等问题，不能在印刷中使用。
The effects of tool's inclination angle on chip formation and the temperature fields, as well as the cutting forces, back forces and feed forces are discussed.
通过三维切削模拟可以获得在不同刃倾角精密切削过程的条件下切屑形状、切削力和切削温度场的分布情况。
The fracture toughness of silicon being bigger than ceramic, the cutting efficiency is higher because of the easier brittle chip formation mechanism.
由于硅晶体的断裂韧性小，锯切时容易形成破碎状切屑，去除率高于陶瓷。
This system can accomplish the whole work on the cutting edge design, construction design and working drawing formation of worm hob.
该系统可完成蜗轮滚刀刃形设计、结构设计与工作图生成的全部工作。
The achievement of its techniques and the formation of its artistic schools can be seen both in the cutting and in the calligraphy.
其技法演变和艺术流派的形成，主要反映在刀法和书法两个方面。
A study on the trends of silver white chip formation when cutting the silicon-aluminium alloy parts with a polymerized crystal diamond cutter is carried out.
对于采用聚晶金刚石刀具加工硅铝合金时产生积屑瘤的一些规律进行了研究。
The formation of the fatigue cracks and the thermally induced cracks are mainly responsible for the failure of the ceramic tool materials un der various cutting conditions.
在不同的切削条件下，疲劳裂纹和热裂是造成刀具材料失效的主要原因。
The above FEM model is analyzed by commercial software DEFORM-2D, and some results including the chip formation, temperature distribution, cutting force variable and residual stress were obtained.
利用商业化软件DEFORM - 2d，对所建立的模型进行了有限元分析，得到了切屑成形、温度分布、切削力变化以及残余应力等结果。
MethodsUnder aseptic circumstance, the adventitious root formation of the cutting branch and explant of Gynostemma Pentaphyllum and growth hormone intervention in the root formation were observed.
方法采取绞股蓝试管繁殖苗插条及外植体，在无菌条件下研究不定根的生成及激素对生根过程的影响。
The effective ways to achieve the wider fiber formation regions can be obtained by increasing the cutting speed and the relief Angle of tool, and decreasing t...
提高切削速度、降低振动杆固有频率、适当增大刀具后角是扩大纤维生成域的有效途径。
The effective ways to achieve the wider fiber formation regions can be obtained by increasing the cutting speed and the relief angle of tool, and decreasing the frequency…
提高切削速度、降低振动杆固有频率、适当增大刀具后角是扩大纤维生成域的有效途径。
The effective ways to achieve the wider fiber formation regions can be obtained by increasing the cutting speed and the relief angle of tool, and decreasing the frequency of vibration staff appr…
提高切削速度、降低振动杆固有频率、适当增大刀具后角是扩大纤维生成域的有效途径。
Meanwhile after a research on formation process of cutting surface, it is considered that flank surface quality of PCD cutting tool is the most important factor.
同时对加工工件表面的形成过程进行了分析，认为PCD刀具的后刀面表面质量是最重要的影响因素。
A study of the literature in oblique cutting shows that only chip formation and mechanics have been studied to some extent. Even these are based on single slip line concept.
从文献看到的斜角切削研究报告大多数限于切屑的形式及基于单剪切面概念的力学研究，似乎斜角切削的研究远远不如直角切削深入。
Burr formation is an important factor of influence to metal cutting quality.
毛刺是影响金属切削加工质量的主要因素之一。
Burr formation is an important factor of influence to metal cutting quality.
毛刺是影响金属切削加工质量的主要因素之一。
应用推荐