維直 的英文怎麼說
中文拼音 [wéizhí]
維直
英文
korenao-
Third, this dissertation analyzes the complicacy of result size estimation problem for xml structure based query optimization compared to its counterpart in traditionally relational database, and proposes a full - featured result size estimation algorithm for xml query, sxm. for simple path expression query, this dissertation proposes a dynamic synopsis model for xml data based on the concept of f - stable and b - stable, xmap. for complicated path expression query, this dissertation adopts an improved bifocal sampling method for result size estimation
第三，分析了xml結構化查詢優化中的查詢代價估計問題與傳統關系型數據庫中的查詢代價估計問題的區別，提出了一套完整的xml結構化查詢代價估計體系sxm ，包括對簡單路徑表達進行查詢代價估計的動態xml數據統計模型xmap ，對復雜路徑表達進行查詢代價估計的雙焦點例舉法，以及對值匹配條件進行查詢代價估計的基於小波的多維直方圖方法，並能將多種查詢表達的查詢代價估計結果結合在一起，以給出一個完整的xpath查詢的代價估計。The fibre diameter increases with increasing fluidity of the molten oxide.
熔融氧化物的流化度增大，纖維直徑增大。Rlean meat percentage is one of the most important economic traints in pig breeding programs. myostatin is a negative regulator of skeletal muscle growth. null or low activity of myostatin, individual muscle of mutant amimals would show a large and widespread increase in skeletal mass. myostatin null animals have significantly larger diameter or more quantity of fiber skeletal muscle. the phenotype was termed double muscling. in order to probe the relation between myostatin and high lean meat rate and plump - hipped trait, we sythesized the c ' 80 amino acids coding sequence of porcine myostatin and costructed the cloning and expressing vector of it
肌生成抑制素（ myostatin ，即mstn ）是近幾年來（ mcpherrona . c等， 1997 ）發現的骨骼肌生長的負調控因子，它主要在骨骼肌中表達。其活性的喪失，會引起動物肌肉的過度發育，肌纖維直徑變大或肌纖維數增加，表現為雙肌癥狀。肌生成抑制素研究的突破將對豬、肉雞、肉牛等畜禽生產性能的提高具有特別重要的意義。3. through the realization of orientation picture showing in three - dimension, solve the problem that there is no way to show how rr, any located points exist in a little region when the located pictures shown in ichnography
為加強罐底定位軟體的分析功能，建立了以罐底為xy平面的三維直角坐標系，編制出相應的罐底三維定位軟體。Standard test method for resistance to airflow as an indication of average fiber diameter of wool top, card sliver, and scoured wool
用氣流阻力表示羊毛毛條生條和洗凈羊毛的平均纖維直經的標準試驗方法The new phenomena, never previously reported in the references, of the pa66 phase morphology in the pp / pa66 in - situ composites varying with pa66 contents ( cd ) are revealed as follows : the diameter or width of pa66 fibers has dispersity, which becomes smaller first and then larger lately with cd. additionally, the number of pa66 unfibrillized paticles increases with cd
發現和分析討論了pp仔a66原位復合材料中pa66相形態隨其含量ud ）的變化中出現的未見文獻報導的新現象： pa66纖維直徑或寬度存在分散性，此分散性隨cd先變小后變大，另外pa66未成纖粒子數隨cd而趨增多。Changes of muscle fiber diameter and their relationships to meat quality in huai pig and its crossbreds
淮豬及雜交後代肌纖維直徑變化及其與肉質關系的研究On the basis of theories of physics, geometrical optics and photometry, the optical properties of collimated light beam incident upon single fiber perpendicular to the fiber axis are studied. by exploring the behaviors of reflected light and transmitted light from single fiber, the distribution of the light is described and the proportionalities between the intensity of the reflected, transmitted and scatered light are obtained respectively, and the different laws governing the intensity of diffused light and transmitted light from single fiber between near and far field are discussed. experiments demonstrate that the decrease of projecting light in far field is in direct proportion for the increase of fiber diameter, which serves as the theoretical basis for a series optics equations, as well as for the designment for photoelectric deviccs for detecting fibers
結合物理學的基本原理和幾何光學的基本規律以及光度學的基礎理論等三方面，研究了單纖維在平行均勻光束垂軸入射時的光學性質.分析了單纖維反光和透光的特徵，光強分佈及反射光、透射光和散射光的相對大小;討論了在近場和遠場條件下，漫反射光和透射光光強的不同規律;通過實驗驗證了遠場時，纖維的漫射光強度與纖維直徑成正比的關系Based on analyzing the intersection curve between the rolled - piece and roll, the method of determining the nip point is put forward
基於對軋件與軋輥截交線的分析，提出了在二維直角坐標系中確定軋件咬入接觸點的方法。It ' s movement is usually known as the stochastic movement which is caused by the equal speed beeline movement and the atmosphere ' s effect
其基本運動一般可被認為是勻速直線運動附加大氣擾動等因素引起的隨機運動，選取目標運動空間為三維直角坐標系。Textiles. tests for fibres. determination of the diameter of wool fibres. method using the projection microscope
紡織品.纖維試驗.羊毛纖維直徑的測定.投影顯微鏡法2. defining the entropy space of image and entropy difference, the concept of information entropy is applied to image retrieval. some mathematical properties of entropy are studied, and similarity measurement of image entropy and corresponding algorithm is presented. these techniques can reduce the dimensionality of histogram space from n to l ( n > l ), increase the image retrieval efficiency, and improve the capability of image retrieval system
將信息論中的信息熵概念引入圖象檢索，定義了圖象墑空間、熵差的概念，研究了圖象熵的性質，探討了基於圖象熵的相似性度量方法和實現演算法，該方法可將n維直方圖空間變為1維，提高了圖象檢索的效率，改善了圖象檢索系統的性能。Scientific computation visualization interactive virtual reality computer dynamic simulation etc., to study thoroughly and carefully on critical technologies such as mixed - language programming simplification of scene models displaying realistic image and animation of 3d scene models and so on in this dissertation, the methods to build scene models were studied and applied to develop a dynamic simulation system of 3d railway scene based on this idea, the major study contents and results can be summarized as follows : 1 ) mixed - language programming can complement each other between different programming languages and the method has a general significance and can become popular many computation models including development of dtm optimum of dtm and reorganization of dtm were developed with fortran language in order to use the ripe codes, the dissertation succeeded in integrating the developed fortran codes to the visual c + + environment and achieving the course of mixed - language programming 2 ) the methods to build scene models for 3d location design were discussed in the dissertation and the development and animation of scene models had been realized by applying synthetically those technologies such as computer graphic computational geometry and geometrical modeling and computer dynamic simulation etc, and adopting opengl 3d graph library then achievement was got by using the technology of 3d visualization to livingly express design results 3 ) combing with the concerned study and development projects, adopting vc + + as development tools and in the light of those theories and algorithms stated in this dissertation, a software, which could build scene models with realism for 3d railway location design, in the name of " the dynamic simulation system of 3d scene of railway " was developed., the correctness was proved by using the software to build the 3d scene models and achieve their animation of suining - chongqing railway and yunnan - xizang railway
本文綜合利用計算機圖形學、科學計算可視化、人機交互、虛擬現實、計算機動態模擬等理論和技術，針對混合語言編程、真實感圖形繪制以及三維景觀模型的動畫驅動等關鍵技術，進行了深入細致的研究，從而探討了建立逼真景觀模型的方法，並基於本文提出的方法研製了一個鐵路線路三維景觀動態模擬系統。基於這一思想，本文主要研究內容及研究成果如下： 1 ）混合語言編程可以實現語言優勢互補，具有普遍意義。針對數字地面模型的建立、優化、重組等計算模塊是成熟的fortran程序代碼，本文成功實現了vc + +與fortran語言的混編； 2 ）緊緊圍繞三維選線設計中景觀模型的建立方法展開研究，綜合利用計算機圖形學、計算幾何及幾何造型學以及計算機模擬技術，採用opengl三維圖形庫，實現了景觀模型的建立以及動畫驅動，使得三維可視化技術成功應用於選線設計成果的三維直觀表達； 3 ）結合有關科研課題，利用vc + +開發工具，以本文所述的理論和演算法為基礎，研製和開發了一個建立三維選線設計逼真景觀模型的系統軟體- - 「鐵路線路三維景觀動態模擬系統」 。The parameters of impregnation are as follows : ph is about 3, the range of temperature is from 20 to 45, and the time is about 2 to 6 hours. after the necessary treatments, zirconia cloths had the optimal strength when the diameters of zirconia fibers were controlled in 4um to 7um, and the sizes of zirconia grains were in 50nm to 100nm. the affec - ting factors were discussed and the liner regression analysis of the cloths was made, from w hich they show that the diameters and grain sizes have the significant influences on zirconia cloths. the obtained zirconia cloths have been accepted for use in nickel - hydrogen batteries by practical use
研究結果表明：粘膠類纖維布最適合制備氧化鋯纖維布的前軀體；鋯液濃度以飽和溶液為宜；浸漬工藝參數為ph值3左右，溫度20 45 ，時間2 6小時；多餘鋯鹽的去除、浸鋯液后纖維布的整平處理及平燒施應力燒成有利於氧化鋯纖維布的柔軟及平整; 200 600燒成溫度段應緩慢燒成，控制氧化鋯纖維直徑在4 7 m ，氧化鋯晶粒尺寸50 100nm時氧化鋯纖維布的強度最好。The aim of this study is to investigate theoretically the possibility for activation of small mammalian myelinated nerve fibers without activating larger ones when stimulating a nerve fiber bundle with a monopolar point electrode using biphasic pulses, which can reduce the electrochemical damage resulted from stimulation pulses to nerve fibers. a simulation system for studying the electrical properties of mammalian myelinated nerve fibers was built based on a simple infinite and homogeneous volume conductor model. by use of an asymmetric but charge - balanced stimulation waveform, the sensitivity of excitation and blocking threshold of nerve fibers to fiber diameter, electrode - fiber distance was calculated. the results show that selective activation of small mammalian myelinated fibers may be possible in a region at some distance from the electrode using biphasic pulses
本研究的目的是要從理論上探討利用單電極雙向脈沖刺激實現哺乳動物神經纖維選擇性刺激， （即當刺激一束神經時，不興奮粗神經而興奮細神經）的可能性.雙向脈沖刺激可以降低刺激脈沖對神經纖維產生的電化學損傷.為研究哺乳動物有髓神經纖維的電特性，建立了一個基於簡單的無窮大、各向同性的容積導體模型的模擬系統.利用該模擬系統，採用「不對稱但電荷平衡」的雙向脈沖刺激，計算了神經纖維的興奮和阻斷閾值與纖維直徑、纖維-電極間距離的關系.結果表明：在距電極一定距離內採用該雙向脈沖刺激模式確實可以實現哺乳動物有髓神經纖維的選擇性興奮Also, the pan mats are handed with heat treatment, preoxidation, carbonization. the heat treatment can enhance the strength of nanoflbers, and the mats deposited on the cylinder have luster by preoxidation and the diameter of nanofiber minish greatly after carbonization
對所得pan纖維氈作熱定型、預氧化及碳化處理，發現熱定型在一定程度上能提高纖維的強度，輥筒收集的預氧化纖維氈有一定光澤，而碳化后的單根纖維直徑大大減小。At the end of the thesis, we incorporate the influences of all the four parameters - half - length l, radius r, viscosity of the fluid v and the density of the fiber / - into one compound parameter a
在論文最後，經過綜合分析各參數的影響，得到了一個能概括半長度l 、半徑r 、溶劑流體粘度v和纖維比重這四個參數對纖維直接相互作用過程影響的組合量| a | 。With which this paper develops a plat to get 3d geometries " euler equation flow solution using jameson ' s finite volume method ( fvm ) techniques
本文通過對三維直角切割網格生成方法的研究，應用jameson的有限體積法建立了一個基於直角切割網格技術的流場計算軟體。We consider all kinds of plane line representations of a plane line, and a simple and practical line coordinate system is suggested. we also present a new 3 - d line representation model. the new representation model is based on the geometry theory : the intersection of two arbitrary planes in the 3 - d space is a line in a plane
本文提出了直線坐標的概念，通過分析各種平面直線的表示方法，提出了一套簡單而實用的直線坐標表示方法，提出了一種新的空間三維直線表示法，這種表示空間三維直線方法是根據空間相交兩平面一般交於一條空間直線的思路而提出的。Thermal and structure character of straight reheating furnace were analyzed in csp technological process. coupling with heat conduction differential equations of the thin slab and the furnace lining, the mathemat ical model of heat transfer is established in the long one dimension furnace by using zone method for making the model of radiant heat transfer. the effect of the moving velocity and kinds of the slab on temperature distribution in the furnace is discussed based upon the solutions to the mathematical model
通過分析csp工藝中直通式輥底加熱爐的熱工及結構特性，採用區域法建立爐內輻射換熱數學模型，與加熱爐內連鑄坯及爐襯的一維導熱方程相耦合，建立長一維直通式輥底加熱爐爐內傳熱數學模型.通過對數學模型的求解，研究分析了不同的薄板坯移動速度及鋼種對加熱爐爐內溫度分佈的影響分享友人