main component analysis 中文意思是什麼
main component analysis
解釋
主成分分析-
Based on the component analysis of beeswax, it is proposed that the beewaxes with the different ratios of main ingredients ( yellow beeswax, resin and paraffin ) can make the different graining patterns
摘要在對蜜蠟成分分析的基礎上，認為蜜蠟中的主要成分黃蠟、松脂、石蠟的調配比例不同，可得到不同的蜜蠟紋理。 -
It focuses on the theory of the mineral functional materials " improving the anti - chloride permeability and the chloride binding. the main achievements of this article include : 1 ) use the technology of xrd, sem, bet, laser particle size distributor etc to test the component, the construction, particle size distributor, specific surface etc of micro - silica, ultra - fined slag, high quality fly ash, meta - kaolin clay, four types of the mineral functional material, theoretically analysis the functions which the four mineral functional minerals act on cement concrete, namely pozzolanicity effect, filling effect, micro - aggregate effect, surface adsorption effect and so bring into play the affect of plastification, lowing of temperature, reinforcement, improvement of durability. base on this analysis we can conclude that the proper diameter of the mineral functional material is 5 m - 15 m, that is blain fineness 4500cm2 / g - 7500cm2 / g
本論文的主要成果包括以下幾個方面： （ 1 ）採用xrd 、 sem 、 bet 、激光粒度分析儀等多種測試手段，探明了以硅灰，超細磨粒化高爐礦渣，優質粉煤灰及偏高嶺土超細粉等4種超細礦物功能材料的組成、結構、粒度分佈、比表面積等基本性質；從理論上分析了礦物功能材料在混凝土中的4種效應，即火山灰效應、填充密實效應、微集料效應、表面吸附效應，並由此發揮出增塑、溫峰削減（降熱） ，增強及耐久性改善等作用；通過相關理論分析，推導出礦物功能材料的合理粒徑范圍在5 m 15 m ，即勃氏比表面積為4500cm ~ 2 g 7500cm ~ 2 g 。 -
The section of traditional portal rigid frame are constant cross - section and wedge shape variable cross - section, this paper brings up a component cross - section ? ripple web plate variable cross - section. according to main specially characterist of portal rigid frame, this paper use matlab to work out analytical software. it ' s concrete analysis includes : endogen force and displacement caculation of rigid frame, stability analysis in and out flat surface of rigid frame, geometrical nonlinear analysis of rigid frame. and make comparison between ripple web plate variable cross - section portal rigid frame and constant cross - section rigid frame
傳統的門式剛架的構件截面為等截面和楔形變截面，本論文提出了一種構件截面形式? ?波紋腹板變截面。本論文根據門式剛架的主要特點，利用matlab高級編程語言編制了4個分析軟體，其針對性強，具體分析包括：剛架的內力與位移計算，剛架的平面內與平面外穩定分析，剛架的幾何非線性分析。 -
( iii ) by c - 14 dating, size and sediment indexes analysis, the malan loess is studied which is the main component of the second terrace in csmasp
認為張夏黃土與青州黃土具有相似的成因和物源，但與洛川等地的典型黃土和萊州灣沿岸的陸架黃土有明顯差異。 -
Numerical simulation signal and vibration acceleration signal of a roughing mill main drive speed reduction unit have been decomposed by using empirical mode decomposition algorithm ; each component has been carried on spectral analysis
摘要運用經驗模式分解演算法對數值模擬信號及某軋鋼廠粗軋機主傳動減速機振動加速度信號進行了分解，從而得到若干個基本模式分量，對每個模式分量進行了頻譜分析。 -
The electric heat components and heated components in resistor furnace were regarded as research object, the simplified model was provided on the basis of simplification of studied objects, the thermotechnical theoretical calculation and analysis for it were done by utilizing radiation heat transfer theory, some main factors influencing the temperature of electric heat component were obtained on condition that the hot load for the heated component be constant, thermotechnical engineering scheme by which the service life for resistor component could be prolonged, was raised
摘要以電阻爐中的電熱元件和被加熱元件為研究對象，經過簡化提出簡化模型，運用輻射換熱理論對其進行了熱工方面的理論計算和分析，在被加熱元件熱負荷一定的情況下，得出了影響電熱元件溫度的幾大要點，提出了延長電熱元件使用壽命的熱工技術方案。 -
After analysis of tm / etm + data ' s advantage over the forest change detection, tasseled cap transformation, principal component analysis and normalized difference vegetation index were chosen to enhance the vegetation spectral information. expert classification system was adopted to extract the main tree species in the littoral shelter forest
在分析etm +數據在森林資源監測中的優勢的基礎上，通過纓帽變換、主成分分析和植被指數法增強植被光譜信息，結合專家分類系統對沿海防護林主要樹種進行提取。 -
Analysis of the changes of the main component contents of the volatile oil in the raw slices and processing ones of atractylodes by gc - ms
法比較中藥蒼術飲片生品與炮製品揮發油主要成分含量的變化 -
Based on the enviroment of the nandagang wetland, combining the outside investigation and inside analysis, adopting the mathematical analysis methods such as the principal component analysis ( pca ), regression analysis, correlation analysis etc. the type of wetland ecosystem, the flora of the wetland plant, the type, the function, the formation and succession and the outside influencial factors of the vegetation, the ecological conditions and biomass of the reed population are all studied. the main results can be concluded as follows : 1 ) the nandagang wetland is a freshwater one close to the bohai sea. its ecosystem can be divided into two parts : natural ecosystem and semi - artificial ecosystem
本研究從南大港濕地的實際環境出發，採用樣方調查的方法，以外業調查和內業分析相結合、野外採集測量與實驗室分析處理相結合、定性描述與定量分析相結合為根本研究路線，應用主分量分析（ pca ） 、回歸分析、相關分析等數學分析手段，對南大港濕地生態系統的類型、濕地植物的區系組成、濕地植被類型、植被的功能、植被的形成和演替、植被的外界影響因素、濕地蘆葦種群的生態條件和種群生物量等方面進行了較深入的研究，主要研究結果如下： 1 ）南大港濕地是濱海瀉湖型淡水濕地。 -
This paper applies the method of infrared spectrum analysis to measure the atmosphere corrosion rusty layer samples from qingdao and chengdu. then, it gets the main component rust phase of rusty layer and shows the changeable situation that the relative content of each rust phase varies with the change of corroded environment and time
運用紅外光譜分析方法，對青島、成都兩地的大氣腐蝕銹層樣品進行了比較測試，得出了銹層的主要組成物相及各物相的相對含量隨腐蝕環境、時間的變化情況 -
The main statistical variables and multivariate control charts are introduced. the design idea of fault monitoring and fault diagnosis systems based on principal component analysis for multivariable control system is analyzed. a model of pta oxidation process is talcen as an example to show the result of fault diagnosis based on principal component analysis
介紹了多元統計過程式控制制在故障診斷中常用的統計量及統計控制圖，分析了基於主元分析的多變量控制系統故障監測與診斷的設計思想，並將其應用於pta氧化過程模擬監控。 -
Based on adequate survey to faults of sodium pump for the china experiment fast reactor, in order that the advanced diagnosis methods are used in the sodium pump which is under fabrication, different methods of fault diagnosis system of sodium pump are designed and programmed ; and the principal component analysis ( pca ) is used to fault diagnosis system of main coolant pump in a nuclear power station. the feasibility of fault diagnosis systems developed have been proved by simulation results
本課題對中國實驗快堆鈉泵的故障進行了研究，把先進的診斷方法應用到正在製造中的鈉泵上，設計和開發了不同方法的鈉泵的故障診斷系統；同時也應用主元分析方法，建立了某核電廠的主冷卻劑泵的故障診斷系統，模擬實驗證明了以上三個系統的可行性。 -
Using the methods of summation by giving a mark and main component analysis, the result indicates that the methods of main component analysis is identical better with reality than the methods of summation by giving a mark, the differentiation trend of types of site conditions of cornus officinalis chiefly receives the accuse in soil fertility factor and the general configuration of the earth ' s surface factor
結果表明：主分量分析法與打分求和法相比，以主分量分析法劃分的類型與實際吻合更好；山茱萸立地條件類型的分化趨勢主要受控于土壤肥力因子和地貌因子。 -
Taking in - situ toughened silicon nitride as a design object, principle component analysis ( pca ) is applied to study the microstructure and mechanical properties, to find out the main microstructure controlling factors, and to simplify the characterization variables and criterions ; fuzzy neural networks ( fnns ) is also applied to develop a design expert system for this material, which can realize the forward prediction from processing, microstructure to mechanical properties, and backward design from mechanical properties or microstructure to processing ; monte - carlo method is applied to simulate the grain growth of this material, and then crack propagation is simulated, which is another way based on physics and chemistry to developing prediction models from processing until to mechanical properties
本文以自增韌氮化硅陶瓷為設計對象，運用主成分分析法（ principlecomponentanalysis ： pca ）對自增韌si _ 3n _ 4陶瓷的顯微結構和力學性能進行數據空間降維，獲得自增韌si _ 3n _ 4陶瓷顯微結構控制的主要因素，進而簡化了表徵參量變量和準則；運用模糊神經網路（ fuzzyneuralnetworks ： fnn ）建立了自增韌si _ 3n _ 4陶瓷設計專家系統，能實現工藝?微結構?性能的正向預測及反向設計；運用monte - carlo方法（ mc ）進行自增韌si _ 3n _ 4陶瓷的晶體生長模擬，然後進行裂紋擴展模擬，探索建立工藝?微結構?力學性能預測模型的思路。 -
The main point of this project is to research the theories and applications of artificial neural network ( ann ) which is suitable for large scale science data mining. especially, our research focus include : dimension reduction techniques based on independent component analysis ( ica ) and wavelet - based denoising or compressing techniques for feature extraction in scientific datasets which have complex features ; classify and clustering techniques of ann combination with data grid, back - propagation neural network, self - growing multilevel self - organizing map for large scale knowledge founding in sdm
特別深入研究以獨立分量分析（ ica ）為主的降維技術、以小波神經網路為主的壓縮降噪技術解決科學數據特徵復雜不便識別的問題;以同網格結合的神經網路、誤差反向傳播的bp神經網路、自適應多級自組織特徵映像網路為主的分類、聚類技術解決科學數據挖掘中的大規模知識發現問題。 -
Second, using the method of wavelet - transform, extract the stable second - low frequency wavelet coefficient, build face database. third, for the sake of eliminating the correlations between entities of the image vector and extracting character - vector, which keeps the main class - information and can be used to rebuild original image, the principal component analysis ( pca ) was used
對人臉庫進行主成份分析，此方法根據人臉圖像整體的灰度相關性來提取特徵向量，所提取出的特徵向量保留了原圖像空間中的主要分類信息，並能在均方誤差最小的意義上重建原圖像。 -
14 quality indexes of the dry white noodle made of 29 wheat breeds extended in north china were determined wholly, the mathematical evaluation model was set up based on 5 main component indexes selected by principal component analysis ( pca ) for evaluating comprehensively various qualities of the noodle and choosing the high - quality wheat breeds specially for noodle, such as taishan 23, luozhan 1, yunong 949, taikong 6 and so on
摘要對29個中國北方的推廣小麥品種製作的干白面條14個品質指標進行了全面測定，採用主成分分析法提取5個主成分指標構建數學評價模型，綜合評價面條的各種品質，優選出了泰山23 、洛展1號、豫農949 、太空6號等優質的面條專用小麥品種。 -
It can make evaluation results more apparent and objective when used to evaluate performance of chinese securities investment funds comprehensively. from three aspects of fund performance, that is risk premium, performance attribution and performance persistence, this paper selects 11 evaluating index, which include sharpe index, treynor index, jenson index and so on. it makes this evaluation system can represent funds ’ performance information completely, afterwards main component analysis is carried out to predigest evaluation outcome to obtain final evaluation result
本文從基金業績的風險收益、業績歸屬、持續性三個方面選取了11個評價基金業績的指標，其中包括夏普指數、特雷諾指數、詹森指數、市場時機選擇系數、股票選擇系數、持續性指標等，使該評價體系能較為全面地代表基金業績的信息，然後通過主成分分析法來簡化評價信息，以獲得最終的綜合評價結果。 -
The main component of this article is study arch - dams stress distribution in difference earthquake and difference water level with finite element analysis. and the study compare the adversed stress distribution on the position whether existed opening hollow areas and pier or not
在考慮了壩身開孔和閘墩的存在後，壩體應力場也將發生一定的變化，特別是在開孔及閘墩附近，與不開孔及無閘墩情況相比將會有顯著的不同。 -
In detail, the main research contents are described as followings : 1. this paper researched on the characteristics of components based development ( cbd ), discussed about domain component analysis method and technology
基於研究的理論性和實用性，本文主要研究成果如下： （ 1 ）研究了基於構件的軟體開發方法的基本特點，以及相關領域應用構件分析開發方法和技術。
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