數據矢量 的英文怎麼說
中文拼音 [shǔjùshǐliáng]
數據矢量
英文
data vector-
Based on vector of land detailed survey database, using spot5 imagery as remote sensing information source to analyze the dynamic change of land use, and then updated the land detailed survey database, completed the cadastre change
摘要以矢量格式的土地詳查數據庫為基準，以spot5衛星數據為信息源，進行土地利用變化監測，進而更新土地詳查數據序，並完成地籍變更工作。Analyse the tooth geometry of klingelnberg cyclo - palloid spiral bevel gear., according to the relative position and kinematic relation of the cutter heads, virtual crown gear and the processed wheel blank, established the system of coordinates of the gear cutting, dedcuced the tooth face equation of the virtual crown gear, according to relations of the gear cutting and space theory of engagement, deduced the tooth face equation of klingelnberg cyclo - palloid spiral bevel gear, and drawing the three - dimensional graphs of the virutal crown gear and klingelnberg cyclo - palloid spiral bevel gear according to the design and setting parameters
對克林貝格擺線齒錐齒輪進行齒面幾何分析。根據銑齒加工中刀盤、搖臺和輪坯的相對位置和相對運動關系建立了切齒嚙合坐標系，由矢量的旋轉推導了產形輪齒面方程;根據空間嚙合原理和切齒嚙合關系推導了被加工齒輪的齒面方程;由設計參數和銑齒調整參數計算得到齒面離散數據，繪制了產形輪和擺線齒錐齒輪的三維齒形。Organizing ofvector data in 3d geographic information systems
三維地理信息系統矢量數據組織In short, vector data take the simplest topological entities - points, lines, and polygons - and anchor them within a 2 - d cartesian coordinate system to describe geographical features
簡言之，矢量數據利用最簡單的拓撲實體點、線和多邊形，並在二維笛卡爾坐標系統中固定它們來描述地理特徵。Firstly, in spherical coordinate system, the sovp formulation for the time - harmonic electromagnetic fields of the current dipole in conductive infinite - space is derived, using reciprocity theorem and transforming relations between special functions. then, selecting appropriate coordinate system, using superposition principle, the boundary - value problem of modified magnetic vector potential on the problem of a time - harmonic current dipole in spherical conductor is solved and analytical solution is obtained. finally, by means of the addition formulas of legendre polynomial and spherical harmonics function of degree n and order 1, the analytical solution in spherical coordinate system specially located is transformed into that in spherical coordinate system arbitrarily located
首先利用特殊函數間的轉化關系和互易定理推導得到了無限大導體空間中球坐標下時諧電流元電磁場的二階矢量位形式：然後利用疊加原理，選擇合適坐標系，求解了導體球中時諧電流元的修正磁矢量位邊值問題，得到了問題的解析解；最後依據不同坐標系下電磁場解的轉化原理，藉助勒讓德多項式和n次1階球諧函數的加法公式，將坐標系特殊安放時的電磁場解析解變換到坐標系一般安放時的解析解，給出了球內電場和球外磁場的並矢格林函數。Svm maps input vectors nonlinearly into a high dimensional feature space and constructs the optimum separating hyperplane in the spade to realize modulation recognition
支撐矢量機把各個識別特徵映射到一個高維空間，並在高維空間中構造最優識別超平面分類數據，實現通信信號的調制識別。Firstly, four alternative mode was introduces for h. 263 data compress arithmetic : the mode of nonrestrictive sportive vector, syntax - based arithmetic coding mode, the mode of supernal forecast, and the mode of pb frame
首先詳細介紹了數據壓縮演算法h . 263以及h . 263演算法的四個可選模式:非限制運動矢量模式;基於語法的算術編碼模式;高級預測模式; pb幀模式。The paper is mainly based on geography, ecology, sight ecology, region location theory and system theory. by interpreting the mss remote sensing image of 1970s and the tm remote sensing image of 1980s and the end of 1990s in keerqin sandlot based on background database and expert information, we have achieved the three periods vector data of land desertification of the research area, then we have disposed the data property by using the powerful spatial analysis function of arc / info and achieved the information extraction and analysis supported by arcview and erdas imagine. thus the rule of temporal and spatial variation of land desertification in keerqin sandlot is researched and the blueprint and countermeasures of the prevention and treatment of land desertification in keerqin sandlot are put forward
本研究主要以地理學、生態學、景觀生態學、區位論和系統論為主要理論支持，通過對科爾沁地區20世紀70年代的mss遙感影像、 20世紀80年代和90年代末tm遙感影像進行基於背景數據庫和專家知識的解譯，獲得科爾沁研究區土地沙漠化的三期矢量數據，利用arc / info軟體強大的空間分析功能對屬性進行處理，並在arcview 、 erdasimagine軟體的支持下進行信息提取與分析，研究了科爾沁沙地土地沙漠化時空變化的規律，提出了科爾沁沙地土地沙漠化防治的構想與對策。According to the moving characteristics of tracklayer, when the vehicle is on ramp and the ground ' s vertical pressure is linear, the calculating formulas of relationship between the deviation of the instantaneous steering center, the position of vehicle ' s gravity, steering radius, moving velocity, moving acceleration, and vehicle ' s orientation, were obtained by the theory and method of vector analysis in mathematics and mechanics
摘要根據履帶式車輛的運動特點，運用數力學中矢量分析理論和方法，推導了接地比壓為線性分佈時履帶式車輛在斜坡上轉向時，瞬時轉向中心偏移量與車輛重心位置、轉向半徑、行進速度、加速度、車輛方位相互關系的計算公式。Qgis handles all three - raster, vector, and database - a state of affairs that took considerable effort for programmers writing gis data programming libraries
Qgis處理所有三種數據柵格數據、矢量數據和數據庫，這也是編寫gis數據編程庫的程序員的重要努力方向。In the helicopter example, the eight flight times become the raw data vector
在紙飛機的實例中， 8次飛行的時間成為原數據矢量。With the development and application of database technology and vector map technology ， large quantities of spatial data have been produced and stored in spatial database and spatial data warehouse
隨著數據庫應用技術以及空間數據矢量化技術的迅速發展，人們積累的數據越來越多，大量的空間數據存儲在空間數據庫中。The main conclusions are following : ( 1 ) compared with the conventional mlc, the method of iterative prior probability based on the vector map can dispel the prior probability ’ s influence and the overall accuracy and kappa index can be improved ; ( 2 ) to the types with greater area than average area of all types, the producer ’ s accuracy will be improved while user ’ s accuracy be lessened, but to the ones with smaller area, the situation is just the opposite
本研究的主要結論是: （ 1 ）與傳統的最大似然法分類相比，利用地理數據矢量化得到的先驗概率進行迭代，可進一步消除先驗概率對最大似然分類法分類結果的影響，使分類總精度和kappa指數有進一步提高; （ 2 ）分佈面積大於平均值的類別，生產者精度一般會變高，使用者精度會變低;分佈面積小於平均值的類別，生產者精度一般會變低，使用者精度會變高。Different from other rank reduction methods, such as pca ( principal component analysis ) and vq ( vector quantization ), nmf ( nonnegative matrix factorization ) can get nonnegative, sparse basis vectors which make possible of the concept of a parts - based representation
與pca （主分量分析）和vq （矢量量化）等降維演算法不同， nmf （非負矩陣分解）演算法能夠分解出非負的，稀疏的特徵矩陣和編碼矩陣，能夠提取原始數據向量的局部特徵，使基於局部特徵進行分類的聚類演算法更容易實現。Gis data has its own properties, so gis data has multilayer mathematic model and storage mode. 2. how to publish information in web
從地理信息數據的特點出發，分析了多層gis數據模型，研究了gis數據的存儲方式，完成了gps測量數據及數字矢量地圖的製作。Based on the analyses of the map data quality standards, data model characteristics, feature coding, various specifications and rules, the paper researches and discusses thoroughly the technology and method for vector map data quality check, evaluation and control both in theory and in practice
本文在分析地圖數據質量標準、數據模型特點、要素編碼、各種規范、細則的基礎上，研究和探討了矢量地圖數據質量檢查、評價和控制的技術、手段和方法，從理論到實踐進行了較為全面系統的研究和探討。The main contents are as the following : ( 1 ) analyzing various operation specifications and standards for the digital information engineering of military surveying and mapping ; and proposing the evaluation model for vector map data quality based on the quantification of the specifications and standards
主要內容包括： （ 1 ）對軍事測繪數字信息工程中所用的各種作業規范、標準進行了分析、理解，在對規范標準進行量化的基礎上，提出了矢量地圖數據質量的評價模型。The contributions done are as follows : according to the mathematical model of doubly fed motor and the theory of vector control, a unit power factor of rotor control scheme is proposed. in the doubly fed adjustment system, in order to control magnetic torque of motor this scheme is designed by controlling the reverse direction between rotor voltage and current to keep the vertical direction between rotor current and flux. it is known from theoretical analysis that for partly decoupling this scheme is only effective under sub - synchronization speed, but not control the system and obtain steady state since speed adjustment system ca n ' t adjust the magnitude of rotor flux under sup - synchronization
而傳統的無速度傳感器雙饋調速矢量控制系統，由於採用磁鏈定向方法，在同步速附近存在較大的工作死區，針對上述問題，本文做了如下的研究工作：本文從雙饋電機的數學模型出發，根據矢量控制的基本原理，提出了一種轉子側功率因數為1的雙饋電機矢量控制方案的設想，即在雙饋調速時採用轉子電流定向的方法，並控制外加轉子電壓與轉子電流始終反相，以保持了轉子電流與轉子磁鏈矢量垂直，通過控制轉子電流的大小來達到控制電機電磁轉矩的要求。According to the structure and characteristic of contour vector data, this paper has put forward some algorithm, which is very useful to check the contour data quality. a practical system of checking the contour data has been developed. it includes some function blocks, such as algorithm of checking bar codes, graphic roaming, zooming in, zooming out, editing and modifying, and the quality checking and evaluating
針對等高線矢量數據的結構和特點，提出一套實用性較強的等高線數據質量檢查的演算法，並建立了一個實用的等高線數據檢查系統，其中包括條形碼檢查演算法、圖形漫遊、放大、縮小、矢量的編輯修改、等高線的檢查賦值等功能模塊： 2Based on the state space equations of acim, a simulation model of the control system of acim is designed by using matlab / simulink. the results of experimentation and simulation indicate that the method of rotor flux oriented vector - control for ac the induction motor is of good dynamic and stability performance. at the end of paper, the conclusion and further research expectation are presented
為提高系統輸入端的功率因數，減少注入電網的諧波，本文根據矢量控制的原理設計了基於功率因數控制的交流感應電機矢量控制的dsp試驗系統;並以感應電機狀態空間方程為基礎設計了在matlab / simulink環境下的感應電機模擬控制系統模擬模型。分享友人