线状

Given a planar point set,the moving least squaremethod is adopted to denoise and resample it so that the resulting point set is with low noise and uniform sampling density.Then the reliable signed distance field of the preprocessed point set is constructed by using the Level Set method.Finally,an algebraic B-spline function is adopted to fit the signed distance field by solving a linear equation system.

首先给定一个表示封闭曲线、可能带有噪音且分布不均匀的平面点云，采用移动最小平方(moving least square，简称MLS)方法对点云去噪、重采样，得到一个低噪音、分布均匀的"线状"点云，再通过Level Set方法建立该"线状"点云的离散几何距离场，最后用一个代数B-样条函数光顺拟合该离散距离场，代数函数的零点集即为重建曲线。

Through studying some fundamental properties of the curved surface in differential geometry , a method of linear feature extraction based on differential geometry is introduced.

通过研究微分几何理论中曲面的一些基本性质，本文介绍了一种基于微分几何的线状地物提取方法，首先在局部区域内拟合一个二次曲面函数，然后通过该函数来估算灰度曲面的梯度和曲率，设定合适的梯度和曲率阈值来检测线状地物，最后进行后处理，消除许多噪声颗粒及小块区域。

After analyzing the merit and lack of 9I model, the main idea is proposed: to distill some basic topological relations from 9I model, of which the composite topological relations of complex objects are made up. In detail, the composite topological relationships between region and region, line and line, line and region are particularly discussed;(2)Analyze the characteristics and inner relations of cadastral features. According to the expressional model of complex topological relations, the author discovers the possible topological relations between parcels, parcel lines and parcel points. In addition, sum up the general topological relationship rules of cadastral data.(3) Then the topological relations model is extended to the spatio-temporal data. Time in cadastral database and change semantic are discussed. It's redefined that spatio-temporal topological relations is composed of time, location, status and event relation. Spatio-temporal topological relationships can be represented by extended 4I model. Taking cadastral parcels as example, there are different possible spatio-temporal topological relationships between parcels when they are extended, shrunken, split, merged or others. Thus, some deductions are drawn that, for example, if parcels have be coexisting for some time they are impossible to be overlapped. Furthermore, the parents of parcels alternated and their possible change types can be detected by their spatio-temporal topological relationships.(4) Before carrying out the experiment, the calculation method must be designed.

具体研究工作及成果如下：（1）根据点集拓扑理论中与拓扑空间相关的概念，本文对空间的点、线、面进行了重新定义，以区分对象的复杂性；分析了9I模型在表示简单对象方面的优点，以及在表达复杂对象上的不足，阐述了本文的研究思路和解决方案，并以复杂的面面、线线和线面为例详细探讨了复合拓扑关系的表达方法；（2）分析了地籍权属数据和地类数据的内涵、特点和要素之间的联系，根据复杂对象的拓扑关系表达模型，本文讨论了宗地、界址线、界址点之间，图斑、线状地物、零星地类之间可能存在的拓扑关系和形式化表达方法，归纳总结了地籍对象的拓扑关系满足的约束性规则；（3）将拓扑关系的研究延伸到时空领域，从地籍对象的时态性出发，本文阐述了地籍数据中时间的含义和变化语义描述的需要；从时间、位置、状态、事件等之间的拓扑关系方面，重新系统性地进行了时空拓扑关系的定义；研究了一维时间和二维空间的集成表达方式，以宗地、界址线为例，分析了变更前后不同时间区间里可能的拓扑关系，探讨了时空拓扑关系对时空变化操作类型和变化语义的推理方法和意义；（4）为实现空间拓扑关系的查询分析等应用，本文研究了空间拓扑关系的计算方法。

A stinging or grasping organ in the outer cytoplasm of certain protozoans, especially ciliates, consisting of a threadlike or bristlelike filament that can be discharged suddenly from a minute capsule.

丝泡，线泡某些原生动物，尤指纤毛虫的外胞质中的叮咬或执握器官，由线状的或鬃毛状的细丝构成，可突然从一个小囊中释放出来

Basal leaves numerous, fasciculate, rosulate; stipules free, brown, linear-lanceolate, margin fimbriate-serrate; petiole 1.5-4 cm, very narrowly winged in upper part; blade ovate or triangular-ovate, 1.3-3.5 × 1-3 cm, both surfaces glabrous to subglabrous or appressed puberulous, with dense brown glandular dots, veins conspicuously raised abaxially, base shallowly cordate or cuneate, margin serrulate, apex ± acute.

基生叶多数，束状，莲座状；托叶离生，棕色，线状披针形，边缘流苏状使成锯齿波；叶柄1.5-4厘米，具狭翅在上半部分；叶片卵形的或三角状心形， 1.3-3.5 * 1-3 厘米，两面无毛到近无毛的或者贴伏被微柔毛，具密的棕色腺点，脉明显在背面突起，基部浅心形或楔形，边缘细锯齿，先端多少锐尖。

The following plastic wastes, i.e., polyvinylchloride cable waste, polyethylene cable waste, used "Trabant" car bodies (polyester- and phenolic resins) were mixed with old motor oil, industrial waste oil, and chlorobenzene from waste oil refining processes, and subsequently subjected, in autoclaves, totemperatures up to 500oC and pressures of 20 MPa using disposable catalyst system of slurry phase hydrogenation.

下面的塑料废物，比如聚氟乙烯线状废物，聚乙烯线状废物，使用&随体&汽车车身与旧机油、工业废油和氯苯从废油精炼出来，随后在小孔中使用泥浆阶段加氢的一次性相位加氢系统加热到500摄氏度和20M帕的压强。

Antiserums against the coat proteins were prepared by prokaryotic expression and 3 by virus purification.

原核表达制备了27种线状植物病毒的外壳蛋白抗血清，提纯病毒制备了3种线状植物病毒的外壳蛋白抗血清。

LINEAR INDICATORS OF MOVEMENT DIRECTION MINERAL ELONGATION LINEATIONS, STRETCHING VERSUS FOLIATION INTERSECTION AXES IN PORPHYROBLASTS FIAs AND THEIR RELATIONSHIP TO DIRECTIONS OF RELATIVE PLATE MOTION

线状指示物斑状变晶叶理交切轴板块的相对运动，-运动方向的线状指示物与斑变晶中叶理交切轴FIAs的比较及其与板块相对运动的关系

The novel mechanisms probably reflect the behaviors of the linear replicons during evolution, and can also be used to explain why circular genetic maps are generated by these linear chromosomes.

这些奇特的机制可能凸显线状DNA演化上独特的行为，而且能够用来解释为什麼这些线状的染色体所形成的遗传地图却是环状的。

The IR fibers were characterized in beaded, thread or network appearance and mainly distr...

IR纤维呈线状、点线状或交织成网络状，主要分布在心肌层及外膜下肌层，多伴血管走行，或攀附血管走行。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。