This approach uses the geometric features and radiation features of the road, according to the small amount seed points given by the user, each point in the road centerline can be gotten. Then an adaptive gray template is used to adjust each point in the road centerline. Finally, least square method and Newton iteration method are adapted to each point in the road centerline to fit a polygonal line.

該方法利用道路地物的幾何特征和輻射特征www黄片com，根據(jù)用戶提供的少量道路種子點亚洲欧美黄片日韩，利用自適應(yīng)灰度模板對道路中心線上的每個點進(jìn)行調(diào)整久久精品亚洲精品无码白，最后采用最小二乘算法和牛頓迭代法對調(diào)整后的道路中心線上的每個點進(jìn)行擬合，以此獲得趨近于道路中心線的最佳折線久久影音先锋精品。

Check content covered the aspect of almost full knowledge of series, if tried check of the 11st problem 2004 of series connect with knowledge of sue for peace, the 2 content check that try the 2nd big problem to combine analytic geometry, inequality of recurrence series, monotonicity and;2005 of knowledge of sue for peace year try the 7th problem to combine polynomial coefficient check knowledge of geometric series sue for peace, the 13rd problem is background check with recurrence series the preliminary knowledge; of the property that series concerns and number theory

考查內(nèi)容涵蓋了數(shù)列的幾乎全部知識點在线欧美一区二区，如2004年一試第11題考查了數(shù)列的通項和求和知識，二試第2大題結(jié)合解析幾何99aaa视频、不等式的內(nèi)容考查了遞推數(shù)列的通項一级a一级s爱片免免费免免高潮、單調(diào)性及求和知識；2005年一試第7題結(jié)合多項式系數(shù)考查了等比數(shù)列求和知識18岁禁止黄色網站，第13題以遞推數(shù)列為背景考查了數(shù)列有關(guān)的性質(zhì)和數(shù)論的初步知識

Within algebraic geometry is the description of geometric objects as solution sets of polynomial equations, combining the concepts of quantity and space, and also the study of topological groups , which combine structure and space.

在代數(shù)幾何里日韩免费在线视频，把幾何對象描述成多項式方程的解集，結(jié)合數(shù)量和空間的概念2020黄色视频；也研究拓?fù)淙貉侵抟磺谙吖劭词悠担Y(jié)合了結(jié)構(gòu)和空間。

Adopt UG software to create the entity about the geometric modeling, through seting the NC parameter. After postposition dispose, gain the NC program and entity model.

利用UG NX軟件進(jìn)行實體生成成a人片在线观看，經(jīng)過數(shù)控加工編程和刀具文件的后處理最終形成可以加工的實體模型三级片在线免费观看网站视频。

Geometric parameters are repeatedly modified in accordance with preconcerted system performance and prospective target; finally achieve perfect dynamic response performance.

根據(jù)預(yù)定的系統(tǒng)性能和預(yù)期的目標(biāo)反復(fù)修正幾何參數(shù)，最終達(dá)到預(yù)期的動態(tài)響應(yīng)性能黄色网站38无码，為先導(dǎo)閥的設(shè)計開辟了一條新的思路东京热精品。

The techniques for prefabrication and assembling of short box-beams based on the geometric control method are still in the beginning stage in our country.

基于幾何控制法的箱梁短線預(yù)制拼裝技術(shù)，在我國尚處于起步階段性色欲情免费网站。

For example, quadratic curve and quadric surface are used as primitive element in most modeling/CAD system. The implicit formulae for computing the intrinsic geometric invariant??

隨著對參數(shù)曲線曲面研究的深入，早在80年代初蘇步青教授等就將幾何不變量的研究引入并應(yīng)用到參數(shù)曲線可以直接进入的黄色网站、曲面的研究中99re视频这里只有精品首页6，取得了重要的成果［1？

The following works have been fulfilled within this thesis: First of all, based on the general principle of virtual displacement of nonlinear continuum mechanics, the geometric and material stiffness matrices is presented, several examples show that both of them can give out accurate result.

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In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

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The average configuration of each group was generated by the Procrustes analysis. These configurations were employed for geometric morphometry: finite-element method and thin-plate spline analysis.

將普式疊合分析法求得的各組平均圖形，進(jìn)行之后有限元素分析超碰人妻人人干、和薄板仿樣分析（Thin-plate spline analysis）的運算国产精品一级乱色视频。