方向因數 的英文怎麼說
中文拼音 [fāngxiàngyīnshǔ]
方向因數
英文
directivity factor-
And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed
研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。Before using phase - only algorithm to achieve nulling, estimations of the number of interferential sources and the doa of interferential signals are needed. so, the spatial spectrum estimation basd on the maximum likelihood method ( capon method ) and music algorithm used for detecting the number of interferential sources and the doa of interferential signals are discussed in the second chapter
在採用phase - only演算法進行波束置零之前，需要估計干擾源的方向和個數，因此本文還在第二章介紹了發射數字波束形成中用於測定干擾源個數和方向的空間譜估計法? capon演算法和music演算法的測向原理，並分析了它們的性能和優缺點。Another direct take market as beginning point move to corporation, under this case, it, basing on the analysis on the optima ] number of business partners, argue that the forming of vc is the sharing result of transaction cost and incentive of non - contractible investment. at the last, base on the analysis mentioned above, and combining with the cases about clothing enterprise in wenzhou city of zhejiang province, it make suggestions to sems on what is the key factor to set up vc
另?個方向是以市場為起點，向企業方向發展，從這個角度本義以企業合作的最佳合作數量為研究對象，通過分析企業間協調成一本的以及參加虛擬企業的激勵因索，提出虛擬企業的形成是交易成本和對商業夥伴的非和約投資進行激勵兩種因素共同作用的結果。最後，本文價:前} fll章節的從礎卜，結合筆一者在溫州對企業調研的案例，對中小企業運用虛擬企業這種組織形式提出建議。With the developing trend of large size and large capacity, the turbine ' s natural frequencies are decrescent, maybe reaching the input forces " order of magnitude. so, it is becoming more and more important to analyze the stability of a turbine
隨著水輪機組朝著大尺寸、大容量的方向發展，其自身的固有頻率也隨之降低，與干擾激振力的頻率屬于同一數量級，因此，水輪機組運行的穩定性就變成更為重要的問題。The direction of magnetisation will change in core a only, thus storing a binary digit.
磁化方向僅在磁心a中改變，因而存儲一個二進制數字。As the directional derivative defined in this paper does n ' t show convexity, when its properties are considered, it is necessary to search for new ways to reach the conclusion
本文定義的廣義方向導數在一般情況下不具有凸性，因而研究其性質時，要採用新的方法來得到類似的結論。Sonographic examinations of the pancreas were performed by sagittal scanning at the epigastrium ; the long axis and short axis of the oval cross - sections of both the pancreatic head and body were measured
檢查測量的方式是在上腹部作縱向掃描，可以分別得到胰臟頭部與體部之圓形縱切面造影，進而分別測量胰臟頭部與體的長軸與短軸，一共為4個胰臟因數。At first, this paper analyzes the factors of water - sand influencing water level of yellow river and the feasibility just using the factors of water - sand to study water level, and collects the corresponding data ; secondly, because there are strong nonlinear relation in the corresponding data, by meticulous theory analysis, this paper integrates basic nonlinear analysis method, theory of random analysis, method of least squares and so on. it puts forward a method which can get the high accuracy simulation of the data, perfects the multi - factor analysis of variable ( over three factors ) of the statistic ; thirdly, it applies the method to the approximation of corresponding water level process which belong to the capacity of sand of middle - high and middle - low, and get the high - accuracy simulation about the typical nonlinear relation ; at last, this paper definitudes the main influence mode that the capacity of sand. it mainly unite with other factors to work on the water level in the yellow river lower reaches ; mor eover, this paper analyzes the difficult point and the direction of improvement to realize the accuracy forecasting of the flood level of erodible - bed channel
首先，系統分析了影響黃河水位的水沙因素，及僅用水沙因素有效研究水位的可行性，並按變量對應思想採集它們的相應數據；其次，由於相應水位過程數據中含極強的非線性關系，本論文經細致的理論分析，將基本的非線性分析方法、統計建模方法、隨機分析理論、最小均方誤差原則等等數學理論及方法有機揉合，提出了能有效實現這類數據高精度擬合的分層篩選法，並改進了統計學中多因子（三個以上）方差分析法；再次，將這一方法用於黃河中高及中低含沙類洪水相應水位過程的擬合，實現了這一典型非線性關系的高精度擬合，各年汛期上下游相應洪水位過程的擬合誤差都較小；最後，明確黃河下游含沙量對水位的主要影響方式，即含沙量主要是與其它因素聯合對水位作用；另外分析了要實現變動河床洪水位過程準確預報的困難所在及改進方向。Because of huge data quantum and high demand of channel bit error rate for video transmission, and fallibility, time variability and limited band of wires channel, wireless video system is faced with lots of problems
由於視頻業務的數據量大、對誤比特率要求高，無線通道又具有易錯、時變和帶限的特點，因此通道的誤比特率要比有線環境大得多，且隨著基站和終端位置、方向的改變而變化很大。Based on the research of the characteristics of piezoelectric ceramic, this paper presents the analysis of the movement of the stator surface points and work principle of motor. this paper describes a theory about the influence of the ultrasonic vibration on the frictional properties of ultrosonic dring, and finds that the horizontal vibration produces friction driving force and vertical vibration affects horizontal driving effect
並且對行波型超聲波電動機的減摩現象進行了研究，發現在接觸區定子表面上一點的水平振動產生摩擦驅動力，垂直振動只起影響水平驅動效果的作用，得出垂直方向超聲振動具有減振作用是引起超聲驅動動摩擦系數降低的原因。Despite the complexity of mathematical biology and these challenges, researchers will continue to pursue this subject because the scientific process forces them to
盡管生物數學領域和這諸多挑戰相當復雜，研究人員仍會繼續研究這類主題，因為這是科學發展的必然方向。Surveys were carried out in three sample villages in yangzhou city, jiangsu province. in this study, the probit model was applied to conduct an empirical analysis of factors related to extension of the technique, and following results were obtained
以揚州市三個村為樣本，在實地調查得到的橫截面數據的基礎上，運用probit模型對影響該技術推廣因素的作用方向和作用程度進行實證分析。For the regular curves, we find two killing fields for the purpose of integrating the structural equations of the p - elastic curves and express the p - elastica by quadratures in a system of cylindrical coordinates. for the star - like affine curves, we solve the euler - lagrange equation by quadratures and reduced the higher order structure equation to a first order linear system by using killing field and the classification of linear lie algebra sl ( 2, r ), sl ( 3, r ) and sl ( 4, r ). we solve the centroaffine p - elastica completely by quadratures
對于正則曲線的情形，我們發現了兩個用於求解p -彈性曲線的結構方程的killing向量場並用積分將p -彈性曲線在一個柱面坐標系中表示出來，而對仿射星形曲線的情形，我們用積分方法解出了歐拉-拉格朗日方程，利用killing向量場及線性李代數s1 （ 2 ， r ） 、 s1 （ 3 ， r ）和s1 （ 4 ， r ）的分類將高階結構方程降為一階線性方程，因此我們用積分完全解出了中心仿射p -彈性曲線。In fact, most other primates have scleras that are so dark that they camouflage which way the eyes are looking
事實上，大多數靈長動物之所以鞏膜顏色很深，是因為可以掩藏自己目光的方向。Zircaloy - 4 sheet, which was cold - worked followed by recrystallization annealing, exhibits longer lcf life in the rolling direction than that in the transverse direction, and the fact that difference in lcf life between both directions becomes larger as the range of plastic strain becomes lower can be attributed to the texture effect, p - solution treatment deteriorates the alloy ' s lcf property because the treatment lowers the average value of alloy ' s schmid factors, and the subsequent annealing - treatment in a - phase range has a impact on the lcf properties, i. e. the subsequent annealing - treatment at 500 ? for 1. 5h results in better property than that at 750 for 1. 5h, which comes mainly from the fact that the alloy annealled at 500 for 1. 5h has lower amount of the precipitate particles than the alloy annealled at 750 for 1. 5h
對于冷加工后經再結晶退火處理的zr - 4合金，軋制方向的低周疲勞壽命比橫向要大。隨著_ p的降低，兩個方向的低周疲勞壽命的差別相應增加，這是由於合金中存在織構的緣故。冷加工后經再結晶退火處理的zr - 4合金在固溶處理后，抗疲勞性能明顯降低，這主要是由於固溶處理降低了合金的schmid因子；固溶處理后在相區的退火對疲勞性能有影響，即500 1 . 5h退火的抗疲勞性能要優於750 1 . 5h退火，這主要與500 1 . 5h退火的合金中沉澱相粒子的數量較少有關。This paper referred to the massive domestic and foreign technical material, elaborated in the sheet forming value simulation theory essential technology in detail, points out when analysis sheet forming question should use the big distortion ball plasticity fem and introduce the application characteristic and the function summarizes of the sheet forming simulation software dynaform. secondly, analyzed the cover forming characteristic, simultaneously introduced the influence cover forming factor in detail : such as ramming direction, the craft addendum surface and the material pressing surface, the radius of convex - concave mold, draw bead, pressure strength, blank size and craft margin and so on. and simulates many typical automobiles cover panel with software : such lateral board, back taillight pedestal and storage cover
其次，分析了覆蓋件成形的特點和要求，同時詳細介紹了影響覆蓋件成形的因素如沖壓方向、工藝補充面和壓料面、凸凹模圓角、拉延筋、壓邊力、坯料尺寸和工藝切口等，並用數值模擬軟體對多個典型的汽車覆蓋件汽車后側圍板、后燈座以及轎車后備箱蓋的沖壓成形情況進行模擬，用模擬結果優化拉延工藝方案，比較了內覆蓋件和外覆蓋件在成形特點和要求的一些異同點，以及常見的起皺、拉裂和回彈、成形不足等缺陷的產生機理和相應對策，重點介紹工藝補充面和壓料面的設計及優化方法，因為拉延是沖壓工藝的關鍵工序，而工藝補充面和壓料面的設計是拉延工序的關鍵，對消除缺陷至關重要。Despite of the positive response, one opinion stated that the core facilities should be more forward - looking. as an independent art form, digital art would be the art form of the future. hence, the museum of moving image should be split into the " museum of film " and the " museum of digital art "
核心設施必須有前膽性，數碼藝術（ digitalart ）乃獨立藝術形式，亦是未來藝術的發展方向，因此電影及媒體博物館應分為電影館及數碼藝術館。And for aggregate spheres, the direction of incident wave, different numbers of spheres in the scattering system are considered as the main part hi studying the light scattering property for such a system
在多球粒子體系的研究中，主要分析了入射場的方向因素、不同粒子組成數目對散射特性的影響。A practical way to overcome this difficulty is to use the so - called " natural level function " as the merit function instead of the general level function
此時newton方向是自然水平函數的最速下降方向。因此，利用自然水平函數進行搜索，可以增大演算法的步長，達到提高演算法效率的目的。Nowadays, development and exploitation of cad become the promising discipline in computer integration manufacture system environment along with rapid development of computer aided design. the principle of product design & manufacture procedure is the collection, transfer, processing and transaction procedure of information, which is externalized by technology integration whose feature is information integration, and traditional way of data organization can not describe and express product design information. in this thesis, we presents semantic - object data model whose definition combines semantic information, such as knowledge and rules, with object - oriented technology according to the design feature of cad system, define semantic - object engineer template combine with template knowledge express way
隨著計算機輔助設計（ cad ）的迅速發展，集成化cad系統的研製與開發成為當今計算機集成製造系統（ cims ）環境下cad的發展方向，因而產品的整個設計製造過程的實質即是對信息的採集、傳遞、加工和處理過程，其本質體現在以信息集成為特徵的技術集成方面，而工程設計中傳統的數據組織方式已不能有效地描述和表達產品設計信息。分享友人