查询词典 x-height

In order to locate direct singular positions, we begin by expressing the determinant of the Jacobian matrix Jx in terms of position of the center P of the moving platform. The Z and the Y coordinates of P may be chosen from the workspace, then the determinant of Jx is now a six order polynomial of X, the x coordinate of P. The direct singular positions corresponding to are obtained by solving the polynomial equation, and retaining all real roots in the workspace.

由速度分析的Jacobian矩阵Jx，将其行列式值表示成活动平台中心点P位置的函数，寻找奇异位置的方法是先假设平台高度，再假设工作空间内P点的Y座标，使Jx行列式成为P点X座标的六次方程式，求解方程式并保留在工作空间内之实根。

The spiny eel , belonging to Perciformes, Osteichthyes, is a kind of little freshwater fish distributed in Southern China. In 1998, Our lab detected XX/XY differentiated sex chromosomes in this specie with karyotypic analysis, and then with chromosomal binding and SC observation, we identified that its two largest metacentric chromosomes were X, Y sex chromosomes in 1999. X, Y chromosomes differ each other not only in the distribution of heterochromatin but also in their shapes, which make them could be recognized directly under the light-microscope without any banding treatment.

刺鳅，属鲈形目、刺鳅科(Perciformes，Mastacembelidae)，是广泛分布于中国南方的小型淡水鱼类。1998年，我室通过核型分析，首次发现该物种具有明显分化的异形性染色体，其性别决定类型为XX／XY型。1999年，本室通过染色体显带、精母细胞联会复合体观察，再次确认刺鳅染色体组中最大的一对中部着丝粒染色体为X、Y性染色体，两者不仅已经出现结构异染色质分布上的不同，同时在外部形态上也存在明显差异，识别特征鲜明，在光镜观察下无需显带即能清晰辨认性染色体。

This is a preliminary report of X-ray diagnosis on osteopetrosis ga-llinarum.

本文在国内首次报告了鸡骨质石化病的X线诊断，利用X线检查，共发现了20只本病的自然病鸡。

Result:all the cases were diagnosed as early anfh by x-ray film in 35 sites,stage i showed osteoporosis and osteosclerosis in 15 sites,stage ii showed osteosclerosis and cystic hyalomere in 20 sites.56 cases of early anfh were discovered by ct in 43 sites.stage i stelliform sign distortion and osteoporosis and osteosclerosis in 17 sites,stage ii showed meniscus sign was 26 sites.

结果：全部患者x线平片诊断早期anfh共35个部位，其中ⅰ期占15个，x线表现为骨质疏松及骨硬化；ii期20个，表现为骨硬化和囊状低密度区。ct发现早期anfh共43个部位，其中i期占17个，表现为组成骨小梁星芒结构消失，骨质疏松变和骨硬化；ii期26个，表现为囊状低密度区及骨硬化。

For detail,we studied the Incidence Algebra I defined by finite Partially Ordered Set X,and sheaf F based on the topology T_x defined by the partial order;By studying the relation between finite module category mod I and the sheaf category Sh_x A,we proved that they are equivalent.

特别的，对给定的有限偏序集X确定的Incidence代数Ⅰ，及由X的序关系定义的拓扑结构T_X上的层F，通过考查有限模范畴modⅠ与层范畴Sh_XA之间的关系，证明了Incidence代数上的模范畴与层范畴的等价性。

The construction characteristics of calcium phosphite were measured with Y-4Q system X-ray diffraction apparatus and the thermal analysis method in this paper.

本文采用热分析和x衍射方法研究了亚磷酸氢钙的结构特性，获得了亚磷酸氢钙结晶水合物的热分解特性和有关热分析数据；获得了亚磷酸氢钙结晶水合物的x衍射图谱和有关衍射数据；分析了它们与结构及其变化的关系。

Methods:[WT5BZ]Thirty-seven cases with primary tumour in department of X-ray ,Haining second hospital January 1998 to June 2000,all patients with pathology (18 cases),cytology(3 cases)and computed tomography,magnetic resonance imaging,specific photology etc.(16 cases)proved lung metastatic tumor and to studied the X-ray basic change,primary tumuorign and patholog types etc.

收集海宁市第二人民医院放射科 98年 1月至 2 0 0 0年 6月拍摄胸片的 37例其原发癌瘤，经病理( 18)、细胞学( 3)或 CT、MRI、特殊造影检查( 16)等确诊的肺转移瘤资料，对其肺部转移性病灶的基本 X线表现、原发癌肿来源、病理类型等进行分析研究。

PMMA compound X-ray lenses are composed of a group of 40 plano-concave elementary lenses positioned in line with axial symmetry.

用LIGA技术中的软 X射线光刻方法制作了PMMA材料 X射线组合透镜。

Then, in the following sections our progresses on X-ray spectrum diagnosis and point projection method were given, and the experimental results were laid out with discusses.

第五章是本文的核心内容，首先简要介绍X射线时、空、谱诊断的主要框架，然后分别介绍了我们在X射线能谱诊断及点投影成像应用诊断的研究进展，以及在神光Ⅱ装置第九路上的实验结果，并给出了必要的分析。

Polyembryonyoccurs in 〓 and 〓 caryopsis of cross SB-1 X Balilla(Balilla is non-polyembryony),and in 〓 caryopsis ofits reciprocal the polyembryony is observed but not in 〓caropsis.

在正交（SB-1 X 马来红，马来红不具多胚特性）〓及〓颖果中都出现了多胚苗，反交（马来红 X SB-1）的〓颖果未出现多胚苗，但其〓颖果观察到多胚苗，表明SB-1的多胚不是合子裂生产生的，而是胚囊的一种特殊性状。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。