母点

基本解释 (translations)

generatrix  ·  generatrices

与母点相关的网络例句 [注：此内容来源于网络，仅供参考]

I suddenly suggested to her giving all our money to the poor except the three thousand left me by my godmother, which we would spend on going to Boulogne, and then we would come back and begin a new life of real work.

我突然向她提出，把全部财产散发给家人，除开从教母那里得到的三千卢布之外。这点钱是要用作去布洛涅的用费的。然后我们回来，重新开始过新的、劳动的生活。

At the same time, combining with the actual condition of delivery pipeline of our country and some prevalent leak detection and location methods, this paper raised a method, which is based on wavelet analysis and negative- pressure-wave to detect and locate the leakage. Jobs in the paper are as follows:As affected by gas density, pressure, specific heat and pipe material, the velocity of negative-pressure-wave improved depending on the energy conservation. At one time, taking the affection of velocity of gas flow, the location formula was modified in some degree.When locating the leaks with location formula, the iterative approach algorithm was adopted as a new method to increase the location accuracy level of system.Multi-scale decomposition and reconstruction of wavelet transform is utilized to filter the noise of negative-pressure-wave, which was brought by leakage. With the capacity to detect the signal singularity fast and accurately, wavelet transform was used to catch the break point of pressure signal. The work improved the accuracy of At in location formula, accordingly improved the location accuracy.Wavelet is a suitable tool for signal analysis. The distinct character is that the mother-wavelet is of optional. That means choosing different mother-wavelet will get different analysis result. So we studied how to choose mother-wavelet and its scale for signal singularity detection. The method is to choose a wavelet by regularities of the wavelet and the signal.Finally, a plan, which bases on SCADA system for inspection and detection of natural gas leakage, is proposed in the article.

其中，主要进行了以下几方面的工作：针对泄漏产生的负压波在管道中的传播速度受媒介的密度、压力、比热及材质等因素的影响，而非声波在空气中传播的速度，本文利用能量守恒原理，对其进行了修正；考虑到管内气体流速对压力波速的影响，对原始的负压波定位公式进行了一定程度的改进，并在利用定位公式进行泄漏点定位时采用逐步迭代逼近算法，提高了系统的定位精度；利用小波变换的多分辨率分解和重构技术，对采集到的管道发生泄漏时产生的负压波信号进行了降噪处理；并利用小波变换技术对信号奇异点的快速、准确的识别能力，对经上述消噪后的负压波信号进行了奇异点捕捉，精确捕捉的结果提高了定位公式中上下游站点采集到的负压波奇异点的时间差△t的精度，从而进一步提高了定位的精度；考虑到小波变换是一种基波可变的信号分析工具，也就是说，不同的小波基波对信号分析的结果将有很大差别，这势必影响最终的处理结果，因此，我们又对比分析了本课题中小波基及尺度的选择问题，依据规则性系数相似性原理对母小波的选择进行了探索性研究；最后，还提出了基于SCADA的泄漏检测与定位系统的软件开发构想及系统的嵌入方案。

Centromeres could be identified easily on the bivalents at diplotene, so it was convenient to analyse the karyotype.

结果表明，日本沼虾染色体数n=52，2n=104，据双线期二价体的相对长度、着丝点位置以及形态诸方面的特点分析了核型，共分为A，B，C，D4个染色体组，核型组成是N=37M+4ST+11T；初级精母细胞减数分裂前期I可分为细线期/偶线期、粗线期、双线期和终变期5个时期，双线期的二价体存在弥散阶段，核仁明显，且双线期二价体着丝点清晰，给核型分析带来了方便。

The main tops of research and creative points of the dissertation are as follows: The gear surface equations are deduced strictly from the space meshing analysis of planar enveloping hourglass meshing surface.

主要研究工作及创新点如下：论文在对平面包络啮合成型运动进行空间啮合分析的基础上，进行了平面包络环面蜗轮副啮合齿面方程的严格推导，进行工具母面坐标系的统一化处理，并利用计算机技术，对平面包络环面蜗轮副啮合型面进行整体理论实体造型，建立了啮合型面的网格化整体理论模型。

The megaspore mother cell is located at the 3rd or 4th layer of cells in the nucellus top end. It divides transversally to form a linear megaspore tetrad, and the megaspore at the chalazal end develops into the embryo sac mother cell.

大孢子母细胞位在珠心顶表皮下第三或四层细胞处，经横分裂后产生一直线形的大孢子四分体，其中位居合点端的大孢子发育成胚囊母细胞。

While the worm surface is generated by contact lines of the generant traditionlly.

计算结果表明，在双自由度运动下，母面无论是直线，平面还是圆弧面曲面，，包络加工蜗杆的过程都是点接触形式，蜗杆表面都是由接触点生成；而在传统上，蜗杆表面都是由母面上的接触线生成。

In the second part of this study, skin and muscle fibroblasts were cultured from nine patients with chronic progressive external ophthalmoplegia syndrome for studying the relationship between mtDNA mutation and free radical scavenging enzymes. The skin and muscle fibroblasts from these CPEO patients carried different mtDNA mutations at different levels.

因此，我针对CPEO病人的皮肤和肌纤维母细胞的mtDNA突变和氧化性损伤进行分析，我以南方墨渍法分析皮肤和肌肉纤维母细胞的DNA，发现这9位病人所含的mtDNA突变差异性极大，有4，977 bp、 4，366 bp、 6，190 bp、约10 kb的大片段mtDNA断损突变和粒线体tRNALeu基因的A3243G点突变。

One side of the weld should pull loose from the parent metal with a metal extension from the weld. Check for proper weld diameter.

从焊件母材金属上拉下来的含有焊点的那一边可以用来检查焊点的直径。

The results show that the plasticity zone and dynamically quiescent layer become fine equiaxed recrystallisation under the thermo-mechanical effect, the grains in the heat-affected zone grow up because of the effect of friction heat. When the rotation speed is 2 500 r/min and the welding time is 12 s, good joint is achieved, and the tensile shear strength of the joint reaches 9.24 kN. The tensile shear strength of spot increases with increasing tool rotation speed, with increasing welding time, the strength increases first, while then reduces. The microhardness of plasticity zone is high, but is slightly lower than that of the base metal, the minimum value of microhardness is in the heat affected zone. When the energy input of joint is high, the fracture type of spot is mode Ⅰ, and the tensile shear strength is high; on the contrary, when the energy input of joint is less the fracture type of spot is mode Ⅱ, and the strength is low.

结果表明：塑性区和动态静止层的晶粒在热和力作用下发生动态再结晶形成细小的等轴晶，热影响区的晶粒在摩擦热作用下长大变粗；搅拌头旋转速度为2 500 r/min，焊接时间为12 s时，可以获得力学性能较好的焊点，焊点的剪切强度达到9.24 kN；焊点的剪切强度随搅拌头旋转速度的增大而增大，随焊接时间的延长先增大后减小；塑性区的显微硬度较高，但略小于母材，接头显微硬度的最小值分布在热影响区；焊点热输入量较多时，接头为Ⅰ型断裂，焊点的剪切强度较高；焊点热输入量较少时，接头为Ⅱ型断裂，焊点的强度较低。

Bertha Benz proved that on this date in 1888, when she became the first person to drive an automobile a long distance: she took her sons on a 60-mile (106-kilometer) trip from Mannheim to Pforzheim to visit her mother. Or so she said.

Bertha Benz在1888年的今天证明了这点，她成为第一位长途驾车的人：带着她的儿子从满海母到浦福而资海母去看望她的母亲，行程为106千米。

与母点相关的网络解释 [注：此内容来源于网络，仅供参考]

Habesne argentum：啊百思内 啊乐跟毒母,你有钱吗

Quid tempus est? 给邓布 塞思特,几点啦? | Habesne argentum ? 啊百思内 啊乐跟毒母,你有钱吗? | Mei capilli sunt flagrantes. 每噶比里 松特 副拉个浪代死,我的头发着火啦.

generally accepted：通用的;普遍承认的

generalized 推广的 | generally accepted 通用的;普遍承认的 | generant 母点;产生的;母点的

generated address：合成地址

generant 母点;产生的;母点的 | generated address 合成地址 | generated code 合成码

generator of a ruled surface：直纹面的母线

二次曲面的母线 generator of a quadric | 直纹面的母线 generator of a ruled surface | 母线;母面;母点 generatrix

generatrix：母点

generatrix of tank 油罐外廓母线 | generatrix 母点 | generic 一般的;属的;类的

generatrix：母点,母线,母面

全断面降伏 general yielding | 母点,母线,母面 generatrix | 几何模型 geometric model

geode：晶石

母点,母线,母面 generatrix | 晶石 geode | 地球测量学,晶石学 geodesy

nacreous clouds：貝母雲;真珠母雲

无线电环形天线盒 nacelle; radio loop | 贝母云;真珠母云 nacreous clouds | 天底(点) nadir

generant：母点;产生的;母点的

generally accepted 通用的;普遍承认的 | generant 母点;产生的;母点的 | generated address 合成地址

Oocytes：卵母细胞

Ferrell(1999)有信服力说服正反馈是造成在响应甾类激素黄体酮(steroid hormone progesterone)是Xenopus卵母细胞(oocytes)成熟的原因. 有趣的是, 在群体水平对卵母细胞响应的有-无的观察,没有观察到这点,