index of precision 中文意思是什麼
index of precision
解釋
精度指數-
Plant endemism is the key problem in floristic study. analysis of endemism in a flora has significant implications in demonstrating floristic richness and diversity, the relationship between plants and their environment, and also in conserving biodiversity of the flora. in view of the situation that most of the past studies on endemism were qualitative, this study is the first tentative approach to the introduction of quantitative indices to the analysis of floristic endemism, with an purpose to push the study of endemism from qualitative to quantitative. four quantitative indices are introduced, i. e. level of endemism ( l ), coefficient of endemism ( c ), degree of endemism ( d ) and general index of endemism ( a ). mathematical formulae have been given to each of the above indices and explanations for them have been presented, and the scope of their use in floristic studies has been delimited and exemplified in this paper. the result shows that they are of good applicability. the proposed indices embody full information of plant systematics and plant geography. with the aid of qualitative analysis, the application of the proposed indices will improve the comparability and precision of endemism study in floristics
過去有關特有現象的研究主要限於定性的分析，可比性和精確性較差.該文嘗試引入特有現象的定量化指標，以推動特有現象的分析研究從定性水平向定量水平邁進.所引入的4種定量化指標分別是：特有水平、特有系數、特有度以及特有綜合指數.對每種量化指標都給出了數學表達式，說明了其區系學意義，例證和界定了這些指標在植物區系分析中的應用，結果表明，它們有良好的適用性.這些指標充分地包含了植物系統學和植物區系學的信息.結合定性分析，這些指標的應用將增強植物區系研究的可比性，使植物區系特有現象的分析達到更精確的水平 -
Through the above researches, such conclusions were drawn that in the course of fitting the semivariogram of the yearly annual mean rice water sensitivity index in yunnan, the fitting precision of ordinary kriging spherecial model is better than others ; range at the direction of 80. 5 degree is outstanding than others ; as for the precision of interpolation, ordinary kriging spherecial model is higher than others
研究表明：雲南水稻多年平均水分敏感指標變異函數以普通克里金球狀模型擬合最優、 80 . 5度方向變程最大、插值模型以普通克里金球狀模型插值精度較高。 -
On the basis of improving the dramatic characteristic of fluid drive system of the platform, the electro - hydraulic servo control system of simulating platform is designed, and its characteristic is analyzed, and the corresponding control algorithm is studied in this paper. what all do is in order to make the platform of ship motion simulating simulate the motion of ship, and realize the high precision motion pose of the platform, and achieve the motion performance index required by the testing of sea sickness
在提高平臺液壓驅動系統動態性能的基礎上，本文進行了模擬平臺電液伺服控制系統的設計、特性分析和控制策略研究，使該模擬平臺能模擬船舶運動，實現高精度的平臺運動姿態，達到暈船病測試所需的運動環境性能指標。 -
In this paper, the drive theory of the large ratio friction transmission is studied ; a new type elliptical cam wave generator is designed ; the large ratio friction transmission prototype is designed and manufactured ; based on the ansys finite element method software, structure of the elliptical cam is analyzed ; precision index of the manufactured large ratio friction transmission prototype, such as transmission accuracy, least step, stability of the least step, load capacity is measured by the absolute rotary encoder. by analyzing the measurement data and research content, it is think that the new elliptical cam wave generator could overcome a good many problems brought by processing errors, facilitate size precision adjustments, input moment can be achieved in the form of a pure force couple importing ; through this study, " the large ratio friction transmission prototype " could apply in practical engineering basically
本文研究了大速比摩擦傳動的傳動理論;設計了新型橢圓凸輪波發生器，設計製作了大速比摩擦傳動樣機;用軟體ansys對所設計的橢圓凸輪結構進行了有限元分析;用19位絕對式編碼器測試了大速比摩擦傳動機構的傳動精度、最小步距、最小步距的穩定性以及帶負載能力等各項精度指標;對測量數據和研究內容進行了歸納和整理，認為新型橢圓凸輪波發生器克服了加工誤差帶來的諸多問題，新型橢圓凸輪波發生器可以進行尺寸精度調整，能夠達到輸入力矩以純力偶的形式輸入;通過本項研究，基本可以使「大速比摩擦傳動機構」在工程中得以應用。 -
The model could be used to match and predict the entire process of oil - gas field development, including the periods forproduction rate going up, peaking, and gelling down, for all development index, with its precision higher than all the other models, and can be widely recommended
該模型可以對油氣田開發全過程，其中包括產量上升、達到高峰與產量下降階段在內的整個開發指標進行擬合與預測，其精度要高於其它各種模型，具有推廣價值。 -
Aimed at design index of input power 1. 5kw, most output rotate velocity 300rpm, and rating output rotate velocity 150rpm, considering factors of angle and ratio of transmission, on the basis of kinematics simulation, author optimized the kinematics parameters. in this paper, author has made some analysis and study to the primal assembly condition of transformer ' s sequential action in theory, designed structure dimension of the input and output transformer, and verified the corresponding strengthen. further, the structure, which is to key transmission components of velocity control system of the speed regulator, has been designed based on meeting operational sensitivity, precision and self - locking
本文針對輸入功率為1 . 5kw ，最大輸出轉速，額定輸出轉速的無級變速器的設計要求，並考慮到傳動角及變速比等因素，在運動學模擬的基礎上，對運動學參數進行了優化；本文對變換器連續作用的初始裝配條件進行了理論分析與研究，對輸入、輸出變換器作了結構尺寸的設計，並進行了強度校核計算；本文還對變速器調速系統中主要傳動構件在滿足操作的靈敏度、精度、自鎖性的基礎上進行了結構設計；最後採用workingmodel3d軟體，進行虛擬樣機的計算機輔助模擬設計及運動學和動力學計算。 -
( 1 ) the posterior distribution of the coefficient matrix, the precision matrix and covariance matrix, and their bayesian estimation under the matrix normal - wishart conjugate prior distribution. ( 2 ) the deduction of the predictive distribution, proved to be matrix t distribution. ( 3 ) the designs of bayesian multivariate mean value control charts in terms of the relationship between the multivariate wishart distribution and x2 distribution, the bayesian process capability index and its confidence lower limi
通過多方程模型系統的統計結構，證明了矩陣正態? wishart先驗分佈是模型參數（ ， ）的共軛先驗分佈，研究了該先驗分佈下模型系數矩陣、精度陣和協方差陣的后驗分佈及其貝葉斯估計，對模型預報密度函數進行了嚴格的數學推導，並將其應用於多元質量控制領域，構造了貝葉斯均值向量聯合控制圖；結合wishart分佈與x ~ 2分佈之間的關系，設計與推斷了貝葉斯多指標過程能力指數及其貝葉斯置信下限。 -
Finally, a soft sensor model of melt index in polymer reaction based on the proposed method is established, and the simulation results show that in contrast to the traditional fuzzy neural network the proposed method is not sensitive to initial parameters and possesses good convergence capability and prediction precision
最後用該建模方法建立了聚合反應中熔融指數的軟測量模型，並與完全基於梯度下降的模糊神經網路軟測量模型進行比較。結果表明改進的模糊神經網路對初始值的選擇不敏感，並且具有很好的收斂性，同時還能達到指定的預測精度，很適合工程應用。 -
Aerial photograph is original resource of the photogrammetry and the revision of topography maps, image quality directly affects the precision of mapping, work efficiency, economy index and the reliability of image interpretation. so it is necessary to take some techniques to insure image quality
航攝像片是攝影測量和修編地圖的原始資料，它的質量對于成圖精度、工作效率、經濟指標以及判讀的可靠性有著決定性的影響，所以在航空攝影及攝影處理的各個工序中應創造出一切條件，使得航攝像片具備良好的質量，滿足攝影測量的需要。 -
Based on sample of the index from april 3, 1991 to may 31, 2001, arima models have been built with tsp computer software guided by route of " from general to specific ". the models built have better fit goodness and one point forward prediction is highly precise. but ultra - sample prediction by c + + program shows prediction precision reduces fast as the length of prediction grows, long term prediction of the index is impossible
建模表明利用tsp統計軟體結合從「一般到特殊」的建模方法，所建的模型對已有數據的擬合較好，向前一步單點預測準確性較高，但利用c語言程序進行進一步分析表明時間序列分析模型對深圳成分指數的長期預測效果明顯降低。 -
In or der to im prove the index precision, the keywords of classification on im age database is used for for m ing a three - level sem a ntics network, and then a unified fra m ework for sem a ntics and feature based relevance feedback in region - based im age retrieval is described, which is experim e nted by irrelatively adjusting the keywords and the weights in the distance m easuring
根據檢索要求，應用圖像庫的分類關鍵字建立圖像語義網路，採用一種綜合圖像中多數區域特徵的匹配策略，以及建立區域語義和低層特徵無縫結合的相關反饋檢索框架，通過不斷調整檢索關鍵字、檢索向量與距離測度中的權重系數的方法提高檢索準確度。 -
Because of modis predominant space and spectral differentiate rate, it ’ s has been broadly applied to various field, in the aspect of snow monitoring, modis has been successfully using a normalized difference snow index ( ndsi ) to provide global automated binary maps of snow cover. the ndsi is a spectral ratio that takes advantage of the spectral difference of snow in short - wave infrared and visible spectral bands, although it has higher precision, it can only discern one pixel to snow or other features, can not satisfy accurate drainage basin snow cover mapping and snow parameter extracting
Modis數據因其優越的空間解析度、波譜解析度，已被廣泛的運用於各個領域，在積雪監測方面，已成功地運用歸一化差分雪蓋指數（ ndsi ）製作每天的全球雪蓋分布圖， ndsi是基於雪對可見光與近紅外波段的反射特性和反射差相對大小的一種測量方法，然而它只能將一個像元辨別為積雪或非積雪，滿足不了高精度應用要求。 -
In order to realize the conversion and unification of the data in different datum frames, converting parameters through robust estimation is put forward when the precision index of the two different coordinates cannot be obtained
針對在無法獲知兩個坐標系下公共點成果精度指標的情況下，提出了利用穩健估計理論合理求解轉換參數的一種方法。 -
In this paper a new method based on sa4828 is proposed and realize through dsp, in order to solve the shortcoming which use more hardware resouces, and the problem in precision and stabilization, which is produced spwm using hardware or software simplie, the experiment shows that this method not only use littler hardware resources but also improve the precision and the stabilization. the tradition pid control can not adapt the change of parameter over the control object, and it can not solve the conflict between dynamic index and the static index. this paper introduced the principle of real time operation systerm uc / os - ii firstly. then analyzed the works in porting to dsp, and give the method to resolve the problems to porting it
此外，這些調節規律本身不能很好的解決系統的動態與穩態指標間的矛盾，也就是說採用傳統的pid難以組成諸如機器人那樣需要完成快速跟蹤、高精度力矩綜合控制的伺服系統。為了解決控制對象參數變化時傳統pid適應性差的問題，本設計採用變論域的模糊pid ，提高了精度、改善了其調節性能。本文主要作了如下的工作，並取得了成就：利用集成晶元ad2s80來求取空間角度，提高了精度，簡化了控制的復雜性。 -
The theory and method of measuring the refraction index of transparent glass - plate with secondary imagery method are introduced. since using ccd, the high measurement precision is obtained
摘要介紹了用二次成像法測定透明玻璃板折射率的原理和方法。由於採用線陣光電耦合器件（ ccd ）測量，提高了測量精度。 -
Testing of mineral oils ; measurement of refractive index with the precision refractometer
礦物油的檢驗.用精密折射計測量折射率 -
The system period is determined by weighted fusion result of all sensors periods with precision as weight and a index function is designed to evaluate the deviation of system period. when the index exceeds the given threshold, the algorithm adjusts the system period to track the data interval of all passive sensors
系統周期由各站點的周期按其觀測精度加權來確定，並設計指標函數來評估系統周期的偏差，超過給定的閾值時重新調整周期，能夠及時跟蹤各單站的數據間隔變化。 -
By the 3d simulation of the missile trajectory, the evaluation index, such as the kill probability, the hit precision can be obtained
建立了電視自動尋的制導導彈的完整模型，包括了傳感器模型、過載控制模型、自動駕駛儀及導引頭模型。 -
It is discovered that the correlation between msavi ( modified soil adjusted vegetation index ) and vegetation coverage is higher than that between ndvi ( normalized differential vegetation index ) and grassland coverage when the land cover is low. so msavi can be used as the main index of grassland desertification degree. in order to evaluate the precision of the result, different methods such as supervised classification, unsupervised classification and visual interpretation on image are tried respectively
本文將其作為草地沙化的分級指標，直接通過計算分級，建立msavi等級與草地沙化程度的對應關系，確定草地沙化的程度，然後將msavl分類結果分別與目視解譯、監督、非監督分類的結果進行了精度比較，其精度高於監督與非監督分類，與典型區現場繪制和目視解譯結果的誤差為5 . 9 ，能滿足草地沙化監測實際應用要求。 -
In this paper, the development trend of micro - electronics equipment, the progress situation of precision work stage for laser photolithography equipment and the research and evolution of magnetic levitation technology in china and other countries are discussed generally. the main function, the demand of technical index and key technology of laser photolithography work stage are introduced simply. the magnetic levitation technology and the work principle of linear motor are stated, and the design and analysis method of mechatronics cad / cae for magnetic levitation precision stage is presented
本文綜述了微電子製造設備發展趨勢及其精密工作臺如光刻機工作臺的國內外發展現狀及磁懸浮技術研究進展，簡要介紹了光刻機工作臺主要功能、技術指標要求、組成及關鍵技術，概述了磁懸浮技術及直線電機驅動的工作原理，著重研究用機電一體化cad cae集成技術設計、分析磁懸浮精密定位工作臺的方法，闡明了應用cad cae技術研製磁懸浮精密定位工作臺的現實意義。
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