查询词典 fold singularity

The orientation-singularity expression of the Stewart platform is deduced by using unit quaternion which can avoid singularity when using Euler angles to represent the orientation of rigid body, and then the algorithm of orientation-workspace of the manipulator at a certain position is proposed.

基于单位四元数描述的刚体姿态，避免了欧拉角等描述刚体姿态的奇异性问题，推导出Stewart机构处于给定位置时的姿态奇异解析表达式，并提出了该机构处于给定位置时的姿态工作空间算法，通过计算机仿真给出该机构处于一给定位置时姿态奇异轨迹和姿态工作空间的三维可视化描述。

Firstly, we analyze the singularity conditions and separate the singularity parameters from the Jacobian inverse. Then, the damped reciprocals are used to avoid the singularities by replacing their reciprocals.

首先， 分析产生奇异的条件，将导致 Jacobian 奇异的参数分离出来，然后用阻尼倒数代替其普通倒数，以回避运动学奇异的影响。

In order to explore the chemical regulation of the plant type dwarfing of Coleus blumei, its cutting plantlets were used as the experimental materials in this research. Through studying its height and cytological characters of each treatment, we found that spraying 800-fold liquor of 15% Paclobutrazol wettable powder and 7,000-fold liquor of 5% Unlconazole (S3307D) on its leaves had significant dwarfing effect on it; 400-fold liquor of 50% chlormequat chloride had not any.

为了探索彩叶草株型矮化的化学控制，以其扦插幼苗为材料，通过对其株高及其细胞学特性研究，发现叶面喷施15%多效唑可湿性粉剂800倍液和5%烯效唑可湿性粉剂7000倍液对彩叶草株型具有显著的矮化作用；叶面喷施50%CCC水剂400倍液，矮化效果不显著。

Compared with women who never used HRT, risk of breast cancer was increased 4.6-fold for combined continuous HRT (95% CI, 2.39 - 8.84), 2.2-fold for combined-sequential HRT (not significant; 95% CI, 0.80 - 5.56) and 1.89-fold for estrogen-only HRT with estriol (not significant; 95% CI, 0.81 - 4.39). Five years after stopping HRT use, there was no increased risk.

持续采用含Progestin荷尔蒙取代疗法者会增加4.6倍的乳癌风险（95%信赖区间，2.39 - 8.84），间断采用含Progestin荷尔蒙取代疗法者会增加2.2倍的乳癌风险（无意义，95%信赖区间，0.80 - 5.56），单独使用estrogen荷尔蒙取代疗法会增加1.89倍的乳癌风险（无意义，95%信赖区间，0.81 - 4.39），5年后停止使用荷尔蒙取代疗法不会增加乳癌的风险。

A sheath fold looks like a scabbard or human's tongue. Its fold axial plane or flatten ed plane is parallel to the foliation and there is strong stretching lineation on the sheath fold.

鞘褶皱看起来像一把鞘或是像人的舌头，它的褶皱轴面或压扁面是平行岩石中的片理面的，鞘褶皱上有强烈的拉伸线理。

The compound 117 is 19-fold more potent than -Hup A and 37-fold more potent than Tactine, its selectivity is 31-fold more potent than Tacrine.

其中化合物117的AChE抑制活性是石杉碱甲19倍、Tactine的37倍，其选择性也是Tacrine的31倍，可作为先导化合物进一步研究。

If both limbs of overturned fold have same dip angle, we call this special overturned fold isoclinal fold.

如果倒转褶皱构造的两翼倾角相等，则可称这种特殊类型的倒转褶皱为等斜褶皱。

If both limb s of overturned fold have same dip angle, we call this special overturned fold isoclinal fold.

如果倒转褶皱构造的两翼倾角相等，则可称这种特殊类型的倒转褶皱为等斜褶皱。

In the presence of yttrium, lutetium and gadolinium, the fluorescence intensity of the system Eu-SPLX-SDS was enhanced about 5-fold, 5-fold and 4-fold compared with that of the system without yttrium, lutetium and gadolinium.

在确定的最佳实验条件下，铕-SPLX-phen-SDS，铕-SPLX-SDS配位体增敏荧光体系和铕-钇-SPLX-SDS稀土元素共发光体系的荧光强度同铕的浓度分别在5.0×10〓～1.0×10〓mol/L，5.0×10〓～1.0×10〓mol/L，5.0×10〓～5.0×10〓mol/L，1.0×10〓～5.0×10〓mol/L和5.0×10〓～1.0×10〓mol/L范围内呈良好的线性关系，稀土元素铕的检测限分别为1.0×10〓mol/L，7.0×10〓mol/L，1.0×10〓mol/L，2.0×10〓mol/L和4.0×10〓mol/L。

On the basis of plan form and crosscutting relationship of the faults, two kinds of tectonic systems were developed in Wu-Xia area, one was strike north-east, and another was strike east-west, the first was developed early and control the structural framework of Wu-Xia area, after that three times longitudinal compress action was happed. According to the intensity of tectonic deformation, The Wu-xia faulted zone from north to south can be divided into the thrust faulted belt, the fault fold belt and the monocline belt. from east to west have three regulatory faults, Wuerhe fault fold belt, Wuxia thrust faulted belt and Xiahong fault fold belt. Base on that 9 secondary structural unit can be divided.Structural accommodation zone and the distribution of reservoir strata have intimate business connection. Usually, Structural accommodation zone was the source zone of arenaceous sediment. The Wu-xia faulted zone have 3 kinds of structural accommodation, concordant approach, concordant overlap and concordant colinearity.

首先研究本区的构造特征，根据断裂的平面形态及相互切割关系，乌夏地区发育两种构造体系：北东向构造体系和近东西向构造体系，前者形成早，控制了该区的构造格局，晚期有3次近南北向挤压作用叠加；乌夏地区南北根据构造变形的强度不同分为冲断带、断褶带、单斜带，东西由于横向调节断层的存在分为乌尔禾断褶区、乌-夏冲断区和夏-红断褶区，进一步划分为九个次级单元；构造调节带与储集层的分布关系密切，通常是大量富砂质沉积的源区，乌夏地区发育三种类型的构造调节带：同向接近型、同向叠覆型和同向共线型。

Finally it offers the analysis of the fault-tolerance system as well as its test verification.

这样，运行于空间环境中的系统的设计目标就是在保证系统实时性

However, it is still difficult to find out the real reason of the increase of the keratinized gingiva during the orthodontic extrusion whether it is due to the proliferation of the gingival tissue or to its elastic nature, that is because the proliferation of the fibroblasts as well as the connective tissue changes in volume and the intra-fibers spaces were all immeasurable in most of the studies.

然而，仍然难以找到真正的原因增加的角化牙龈在正畸挤压它是否是由于扩散的牙龈组织或其弹性性质，这是因为增殖的成纤维细胞以及作为结缔组织的变化量和内部纤维空格都是不可估量的，大多数的研究。