转化曲线

Specifically, we apply the polar form in the conversion between triangular Bezier surfaces and rectangular Bezier surfaces. This problem helps us to understand the theory of polar form in a unified way. At the last half of this paper, we consider the problem of geometric continuity of parametric curves and parametric surfaces.

我们利用Polar形式实现了三角Bézier曲面和四边Bézier曲面之间的相互转化，同时通过应用，我们对Polar形式也有了一个统一、全面的认识；论文的后半部分考虑了参数曲线曲面间的几何连续性问题。

Furthermore, the analysis of X- ray diffraction diagram indicated that cadmium ion was transformed into cadmium sulfides by H strain. Also, we found that the removal for cadmium was dependent on the growth stationary phase of H stain through determining the removal rate for cadmium, the growing curve of cell and the activity of cysteine desulfhydrase.

通过X射线衍射光谱分析，H菌株对镉离子的转化产物为硫化镉，通过测定镉的去除与细菌生长曲线及半胱氨酸脱巯基酶的活性，表明镉的去除与菌体的生长稳定期相关。

In chapter 3,we discuss the conversion from triangular Béziersurfaces to rectangular Bézier surfaces by reparametrization.

第三章应用Bézier曲线、曲面的算子表示技巧，研究了从Bézier三角片到Bézier矩形片的转化关系。

Through transforming the vibration isolation system differential combined equations to the state space equation,it is possible to facilitate the solution of vibration isolation coefficient curve of vibration isolation system by using the Matlab/Simulink module.

通过将隔振系统的微分方程组转化为状态空间方程，使用Matlab/Simulink模块可方便求解隔振系统的隔振系数曲线。

If the tangent line is extended to the horizontal axis the problem is simply a matter of comparing angles formed by the lines and the horizontal axis.

如果将曲线上某个点的切线延伸并与水平坐标轴相交，这时候问题便转化为只需要比较该切线与水平轴所形成的角度便可以确定该点为弹性或非弹性。

According to this process, the key technology which including the characteristic measurement of surface, the pretreatment of data getting by line scan, the character expression and fitting of curve and surface, the characteristic identify of surface and translation from the model of surface to CAD.

对实物反求过程中的各关键技术作了研究，包括：曲面的特征测量、逐行扫描测量数据的预处理、曲线曲面的特征表示及其拟合、曲面的特征识别以及曲面模型向CAD模型的转化。

Since the lengths of the line segments and the angles between line segments are treated as representation parameters, it is convenient to construct energy function and to deal with displacement and length constraints. Based on this advantage, a parametrical model for human body is proposed, which can easily produce human body models with different feature sizes. The above method is just suitable for polylines. Therefore, a generic deformation method for both discrete curves and surfaces is presented. The energy function is constructed by analyzing the relationship of the points before and after deformation. Together with the displacement constraints, the deformation problem is converted to a convex quadratic programming. A necessary condition for constraint points and a sufficient condition for the uniqueness of solution are given. The proposed method can be combined with skeleton-driven animation to control the deformation.

将线段长度与线段之间的角度作为表示参数，既有利于能量函数的构造，又便于处理位移约束和长度内蕴约束条件，利用这一优势，将其应用于三维人体的参数化建模，可以方便地产生具有不同特征尺寸参数的人体模型，由于这种方法只适用于折线变形，具有较大局限性，因此，本文进一步提出一种较通用的离散曲线曲面变形方法，通过分析变形前后的位置关系来构造能量函数，再加上位移约束条件，将变形问题转化为一个凸二次规划问题，并且给出了约束点应满足的必要条件及模型解唯一的充分条件，这种方法还可以与骨架驱动变形的思想相结合，能更好的控制变形。

The research is about the reuse of urban sewage for virescence irrigation, and the influence of sewage irrigation on eco-environment such as soil, plant, etc. is studied. Under the condition of field sewage irrigation, the transport and transformation and accumulation mechanism of heavy metals, nutrients and organic pollutants as vaporizable hydroxybenzene etc. in the soil-plant system are analyzed. The heavy metal pollution is evaluated by the comprehensive pollution index. The spatial variability of heavy metals in sewage irrigation area is further understood. The spatial variability of heavy metals and physical and chemical properties of soil are reflected in a more straight way by the theory model of variance function curve based on the geographical information system.

在城市污水回用于绿化灌溉对土壤、植物等生态环境的影响研究中分析了大田条件下污灌对土壤-植物体系中重金属、养分及挥发酚等有机污染物迁移转化及富集机理，对重金属污染进行了综合污染指数评价，进一步了解了污灌区重金属分布的空间异质性，基于地理信息系统提出了变异函数曲线的理论模型，更直观地反映出了重金属元素与土壤理化参数的空间变异特征。

According to the requests, the curve is changed into abstractive dimension of the mould inner space.

在分析结晶器内坯壳和气隙形成机理的基础上，提出了结晶器锥度设计原则，并建立锥度计算模型，优化设计出三种不同形式的抛物线锥度结晶器，可依据不同工艺条件设计出锥度变化的曲线，并可根据要求转化成内腔绝对尺寸。

Results We can induce MSCs into osteoblasts which can express gene col Ⅰ and ALP. Through analysis growth curve, we demostrateed the diphosphonate or assemble flavone of drynaria rhizome with 10^(-4)~10^(-6)mmolL^(-1) had the inhibition on the osteomast; it with 10^(-8)mmolL^(-1) had a promotion on the osteoblast; it with 10^(-10)~10^(-12)mmolL^(-1) had a restraint on osteoblast. Conclusion Through gene analysis, we found the diphosphonate or assemble flavone of drynaria rhizome can have the promotion on the osteoblast.

结果 骨髓基质细胞经过4周诱导可转化为表达colⅠ和ALP的成骨细胞，经过生长曲线分析，二磷酸盐和骨碎补总黄酮10^(-4)~10^(-6)mmolL^(-1)时，对诱导后的成骨细胞有抑制作用；10^(-8)molL^(-1)有促进作用；10^(-10)~10^(-12)mmolL^(-1)不明显，其中10^(-8)mmolL^(-1)作用最强；基因分析后，发现二磷酸盐和骨碎补总黄酮促进成骨细胞表达colⅠ和ALP，且两者合用效果大于单独用药。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。