1) lower critical power density
下临界功率密度
1.
When the vaporization appears on the material surface,the laser welding is in the critical condition between thermal-conduction welding and deep-penetration welding,and the simulated laser power density equates with the lower critical power density of laser deep-penetration welding at a given welding speed.
当材料表面刚好出现气化时,激光焊接处于热传导焊与深熔焊之间的临界状态,此时,模拟的激光功率密度就是特定焊接速度下激光深熔焊接的下临界功率密度,可以用激光焊接的热传导模型进行模拟。
3) critical laser power density
临界激光功率密度
1.
The critical laser power density to induce plasma for different powders is studied in this article by means of fully-automatic laser welding machine LSM240.
研究结果表明 ,Fe ,Co ,Ni三种试样在CO2 激光作用下产生金属蒸气时的临界激光功率密度IC 为ICFe >ICCo >ICNi;等离子体得以有效控制的下限临界气流量QS 为QFeS
4) critical power
临界功率
1.
Nd:YAG CW laser heat-conduction welding——Ⅱ.calculation of critical power;
Nd:YAG CW激光热传导焊Ⅱ激光热传导焊临界功率的计算
2.
Then the Schrdinger-type nonlinear equation in strong nonlocality was given and from the equation the analytical expressions of the single soliton and the critical power .
得到了非线性系数以及特征长度和预倾角的关系,并且给出了强非局域性的非线性薛定谔方程,最终得到了单孤子和临界功率的解析解。
3.
In experiment,we observe the propagation of solitons in nematic liquid crystals,and determine the critical power of optical spatial solition in different beam width,for example,when the.
实验上,观察了空间光孤子在向列相液晶中的传输,找到了不同束宽下空间光孤子的临界功率。
5) Critical density
临界密度
1.
Through measurement and analysis the critical density of Kerner s non-linear model, the propagation speed of the wide moving jam and the unimpeded velocity of Greenshields s model are obtained.
以北京市一个路段的实际录像资料为例,通过测量和分析获得Kerner非线性模型中的临界密度、宽运动堵塞的传播速度和Greenshields模型中的畅行速度等参数。
2.
Different from the typical evaluation index-level of service,this paper adopts critical density ratio to evaluate the operation condition of urban highway basic sections,which synthetically reflects the requests of both road managers and users.
与传统的服务水平评价不同,采用能够综合反映道路管理者和道路使用者共同要求的评价指标——临界密度比对城市快速路基本段的运行状况进行评价;根据快速路交通信息采集系统提供的大量数据,比选了适合的交通流模型,并对临界密度进行标定;最后给出了评价指标的等级划分和对应状态的描述。
3.
The experimental results showed that there was a critical density for transition to detonation at certain confinement condition.
不同密度炸药的DDT性能不同,较低密度的炸药更容易发生DDT现象,固体压装B炸药存在一个燃烧转爆轰的临界密度值。
6) lower critical magnetic flux density
下临界磁通[量]密度
补充资料：下临
1.下对;下视。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
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