By using Jordan Curve Theorem and classical combination, we obtain the formulas for computing the flexibility of wheels and wheel-like graphs on the torus. 2. By C.Thomassen's work on Large Edge Width embeddings, we obtain some properties of some locally LEW-embedded graphs.

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By using Jordan Curve Theorem and classical combination, we obtain the formulas for computing the flexibility of wheels and wheel-like graphs on the torus.2. By C.Thomassens work on Large Edge Width embeddings, we obtain some properties of some locally LEW-embedded graphs.

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Constituting dicycle; 2. region selectively reducing six-membered ring ketocarbonyl radical; 3. introducing 7alpha-hydroxy group; 4. Aldol reaction to introduce side chain and obtain 8alpha-hydroxy group; 5. oxidizing the position 7 hydroxy group into ketone; 6. turning the configuration of the position 7 hydroxy group; 7. glycosidating the position 7 hydroxy group; and 8. eliminating protecting group to obtain the target compound.

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However, it is this place last centuries are close to be being removed at the beginning of 90 time and the school, since 1996, however a new force suddenly rises, successive first place of middle school of country of city of lasher of ginger of house of achievement of 11 years of the university entrance exam, obtain quality of high school of ginger lasher city to teach quality to evaluate outstanding award year after year, obtain the university entrance exam for many times special contribution award, walked out of the road of the development with free-standing self-improvement of middle school of a country.

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A steel bar is washed and dried, and then put into a glass pipe which is sealed to obtain stirring magneton; a mixed solvent of Gamma-methacrylate oxide propyl trimethoxy silane and methanol is prepared and added with an organic base to obtain a pre-bonding solvent; the stirring magneton is immerged into the pre-bounding solvent, and the outer surface of the glass pipe of the stirring magneton is bonded with a layer of silane substance with alkenyl; a reactive monomer mixture and a pore-forming agent mixed solvent are evenly mixed and then added into a container, the stirring magneton after the pre-bounding is put into the container which is sealed and then put into a water bath; after reaction, the container is removed, the stirring magneton coated with a polymer is taken out and put into a extractor and extracted by using a solvent; or the stir bar is immersed into the solvent till no impurity can be checked in the solvent, thereby obtaining the product.

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When we analyse rigid body with the theory of limit equilibrium, we do not obtain always reasonable maximal principle in physics, and the maximal value is the result of soil plasticity deformation.(2) Thoroughly commenting the typical method of slices from their satisfid equilibrium conditions, calculational parameter and their convergence, the thesis sortes the methods into four kinds. The first satisfies all kinds of equilibrium conditions, can obtain interslice force and the factor of safety.

2從滿足的平衡條件理伦片无码、求解的參數(shù)及其解收斂性等国内黄片在线看，分析了各種常用極限平衡條分法，將其分為四類快射视频欧美，第一類方法既滿足力的平衡一区二区国产高清视频在线，也滿足力矩平衡，能獲得條間力和穩(wěn)定系數(shù)的收斂解插逼吃奶头69黄色视频；第二類方法只滿足一個方向力的平衡和力矩平衡亚洲国产精品自拍线路，只能求得穩(wěn)定系數(shù)；第三類方法既滿足力的平衡瑟瑟在线人体，也滿足力矩平衡日韩中文在线精品字幕，但不是嚴(yán)格的靜定問題，解的收斂性差欧美高清色色；第四類方法滿足兩個方向力的平衡美女AAAAAA一级毛片，不滿足力矩平衡，可求得穩(wěn)定系數(shù)和條間力的大小国产最新自拍网，不能求得條間力方向在线a亚洲看片。

It is difficult to obtain the accurate segmentation threshold of the image. This paper uses the multinomial to approximate the histogram envelope curve by different phase. So the question of how to obtain the accurate segmentation threshold of the image can convert into the solution of the minimum of multinomial, Using this method it can be solved the question how to segment the image more accurately.

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The representative minority cultural relic-pottery relic of Buyi minority and the two wooden masks is taken as the research object. Firstly, Hiscanner laser scan detector was adapted for data collection, and then obtain point cloud data which could be recorded on disc for permanent saving was obtianed; Furthermore, the new popular reverse engineering software Geomagic for some disposals of point cloud data was adopted in data condensing, data mending, data filtering, feature line picking up to obtain NURBS surfaces; and then the error between the reconstructed CAD model and the point cloud data was evaluated to guarantee the precision of surface reconstruction to keep the relics keep its original appearance. In the end, the NURBS surfaces are imported to 3D software Solidworks and entities of CAD are generated by surface sewing, mold loft and ablating and other instructions.

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