曲率的形成 的英文怎麼說
中文拼音 [qūlǜdexíngchéng]
曲率的形成
英文
form for curvature-
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。In the course of working, ， the plow will make use of the shuttling method so that it can dig alternately either on the left or on the right. compared to the unilateral plow, it can improve the productivity because it can help leave off the soil 、 take from the consumed energy and reduce the empty journey. to meet the requests above, we will use a remote cylinder with both a small cubage and double functions, approximately designing the plow to be columniform and symmetric. after the experiment for a period in the field, we found that the most frayed areas had happened at the places of both plow shank and share and at the same time the base of the remote cylinder had ruptured suddenly
與單向犁相比，其優點在於：耕地無開、閉壟，地表平整，降低了耕后整地的能量消耗，減少了地頭的空行程，因而大大提高班次生產率。為了滿足犁體梭式作業的要求，我們採用了一隻小容積雙作用的液壓油缸；同時對犁壁曲面的形狀採用了近似圓柱形的對稱設計。但經過一段時間的田間試驗，我們發現：該犁犁胸部分的犁脛和犁鏵上的犁尖在工作中磨損較為嚴重；主犁梁和油缸缸體的連接部分（即油缸底座）突然發生了斷裂，造成整個犁體無法正常工作。This paper researches and analyses the developments of web technology and magnetostrictive transducers from world wide region. the paper also analyes the characteristics curve of magnetostrictive transducers based on its equivalent circuit and researches the method how to make sure its syntony frequency and its electric simulation network parameters. at the same time, by using jsp technology, a magnetostrictive transducer electric simulation application is designed based on b / s three - tier system structure. the experiment data is fitted by curve fitting module. the equivalent input impedance of it with stimulate loop is separated based on the results of curve fitting and the syntony frequency and electric simulation network parameters of magnetostrictive transducers is determined by the input impedance. the method presented in this paper can determine the syntony frequency and electric simulation network parameters of magnetostrictive transducers with a better accuracy than the testing method of syntony & anti - synton y. further more, jsp, the advanced technology at current, has been used to realize a magnetostrictive transducer web electric simulation system. the system has good human computer interface and the function of resource sharing and information publishing. the research of this paper and its achievements have some practical merits in the researchful and applied fields of magnetostrictive transducer
用java編程語言編寫的曲線擬合模塊，對輸入的實驗數據進行了最小二乘法的曲線擬合；根據曲線擬合結果可從帶激勵線圈的磁致伸縮換能器的輸入阻抗中分離出磁致伸縮換能器鐵芯在無激勵電流時由機械振動形成的等效輸入阻抗，並由此輸入阻抗確定磁致伸縮換能器的諧振頻率及電氣模擬網路參數。本課題提出的方法與傳統的諧振?反諧振法相比，能更準確地確定磁致伸縮換能器的諧振頻率及其電氣網路參數。同時，採用當前比較先進的web技術，實現了基於jsp的磁致伸縮換能器web電氣模擬系統，該系統具有良好的人機界面和資源共享、信息發布功能。Then a high - degree geometric continuity blending surface is obtained with transfinite interpolate method. ( e ) g3 blending surface with approximation can be constructed by lofting if geometric invariant errors are given, the surface can be converted to b - spline, nurbs form for the purpose of system aggregation
最後，為滿足曲面造型系統集成的需要，在保證曲率、曲率導數和撓率精度情況下，將上述研究結果應用於曲面放樣逼近方法，得到參數過渡曲面轉換成b樣條曲面或nurbs曲面的形式。The results indicated that the dimension, shape and purity of base material could meet the functional demand of solid lubricant ; the thermal decomposition temperature of ptfe resin exceeds 400 c, but organic and inorganic packing filler added in ptfe made the water absorption rate of composite material increased, melting temperature and decomposition temperature decreased, in the meanwhile oxidative decomposition reaction was accompanied ; polar groups such as c = o, c - o - c and so on in the carbon fiber surface is advantageous to increase compatibility with other components and interlayer shearing strength ; uniform design experimental method could help to find the relationship between formula and frictional property by relatively small tests. the developing trend of each formula ' s friction coefficient could be showed by fitting curve ; the friction coefficient with no copper powder or graphite in formula was relatively big. this fact showed that copper powder and graphite should be used cooperatively ; it was found that when the ratio of copper powder to graphite by weight is 15 : 60, 30 : 30 - 40 and 60 : 15 - 30 respectively, the friction coefficient was relatively small. the degree of crystallinity of pure ptfe reached maximum by air cooling and the abrasion loss also reached maximum among three ones ; at the same time, the abrasion loss of solid lubricant sample was also the biggest among three ones ; when solid lubricant matched with 45 # steel axle or gcrl5 steel axle, lubricant transfer film could be formed on metal surface, thus direct contact between the surface of metal friction pair rings was reduced. their working life was elongated extremely ; there was mainly much graphite, a little ptff, moo3, feso4, cus and so on in lubricant transfer film
試驗結果表明：所選原料的尺寸、形狀及純度可滿足固體潤滑劑的性能要求；聚四氟乙烯樹脂熱分解溫度超過400 ，但在ptfe中加入無機填料會使復合材料吸水率提高，熔融溫度及分解溫度降低，且伴有氧化分解反應；碳纖維表面含有c = o及c - o - c等極性基團，有利於提高其與其它組分的相容性，提高層間剪切強度；均勻設計試驗方法能夠用較少的試驗次數找出配方與摩擦性能間的關系，擬合曲線基本能表示各配方的摩擦系數發展趨勢；配方中不加銅粉或不加石墨，其摩擦系數均較高，說明銅粉和石墨應該配合使用；當銅粉15份、石墨60份時，銅粉30份、石墨30 - 40份時，銅粉60 、石墨15 - 30份時，摩擦系數均具有較低值；純聚四氟乙烯樹脂在空氣冷卻時結晶度最大，磨損量也是三者中最大的；同時，固體潤滑劑試樣在空氣冷卻時的磨損量也是三者中最大的：不論是固體潤滑劑與45 #鋼軸配副或是固體潤滑劑鑲嵌入銅套后與gcr15鋼軸配副，在金屬表面均可形成潤滑轉移膜，從而減少金屬摩擦副表面間的直接接觸，大大延長其使用壽命;轉移膜中主要含有較多的石墨、少量聚四氟乙烯、 moo 。Applying the basic theories of spatial data mining and geomorphology, taking the loess plateau of north shaanxi province, china as the research area, this dissertation explored the theories and systematic structures of geomorphologic data mining and acknowledge discovery from dems, ascertained the systematic structures of topographic factors and synthetic topographic acknowledge, as well as systemically summarized mining algorithms from dems. the author pa id more attention also to analyze the principle and algorithm of flow length, curvature, relief, the earth ' s surface incision and gully density. in this research, the elementary constitutes and mining algorithms of regional character acknowledge in the loess plateau were probed
本研究在廣泛總結前人研究成果與研究經驗的基礎上，利用空間數據挖掘和地形地貌學的基本理論，以陜北黃土高原多地貌類型區為實驗樣區，以1 10000比例尺dem為樣本數據，探討了dem中地形地貌數據挖掘與知識發現的理論方法和體系結構；確定了宏觀和微觀地形因子、地形綜合特徵知識的體系結構；系統總結了dem基本地形因子的提取演算法，並重點對坡長、曲率、地形的起伏度、切割深度和溝壑密度因子提取的原理與演算法作了深入的分析；提出了黃土高原地區區域特徵知識的基本構成及其系統完整、科學可行的挖掘提取演算法；擴充了arcviewgis軟體平臺中dem空間分析的基本功能；實現了以delphi7 . 0為平臺的地形信息輔助挖掘系統的設計與開發；完成了對黃土高原多地貌類型區（樣區）地形信息空間分異特徵的分析。Basically like “ adaptive approach ”, the method can control triangulation density with respect to the change of normal curvature of the surface generating a small number of triangular facets, and thiny triangles, degenerate triangles and “ cracks ” in 3d space will not occur, but the speed of the algorithm is higher than that of adaptive one
該方法基本上可以像「自適應」方法一樣，根據曲面的法曲率變化來控制三角化剖分的密度，生成的三角片數量較少，並且可以避免在三維空間產生狹長的三角形、退化三角形與「裂縫」 ，運行速度明顯比自適應方法快。Under windows nt and labview development environment, using the linear fit module, exponential fit module > general polynomial fit module of labview to design a method for fitting the experiment data, the results of curve fitting indicate that the purpose of general polynomial fitting is better than the rest. separating the equivalent input impedance of magnetostrictive transducers without stimulate current from input impedance of it with stimulate loop based on the results of curve fitting, and determining the syntony frequency and electric simulation network parameters of magnetostrictive transducers by this input impedance. finally, with labview network functions, realizing magnetostrictive transducer electric simulation system based on web server and discussing a scheme for this system network by datasocket. the method of this paper can more accurately determine the syntony frequency and electric simulation network parameters of magnetostrictive transducers than the testing method of syntony & anti - syntony. at the same time, discussing virtual instrument measurement system and how to realize magnetostrictive transducer electric simulation network system by labview network functions of network virtual instrument measurement development environment
在windowsnt系統環境和labview虛擬儀器技術開發平臺下，首次利用labview中的直線擬合模塊、指數擬合模塊以及多項式擬合模塊，設計了一種對實驗所得數據進行曲線擬合的方法，對三種擬合方法進行了比較，曲線擬合結果表明，多項式擬合方法相對于其它兩種擬合方法效果更好；根據曲線擬合的結果可從帶激勵線圈的磁致伸縮換能器的輸入阻抗中分離出磁致伸縮換能器鐵芯在無激勵電流時機械振動形成的等效輸入阻抗，並由此輸入阻抗確定了磁致伸縮換能器的諧振頻率及其電氣模擬網路參數；最後通過labview提供的網路功能，實現了基於web服務器的磁致伸縮換能器電氣模擬虛擬儀器測試系統，並探討了通過datasocket技術實現該系統網路化的方案。Using displacement - load sensor to collect displacement and load data and adopting micro - power wireless communication module to transmit the load and displacement data to main part of the oil - well monitor and control system by serial port to form the indicator diagrams. the key to give the oil well effective monitor and control is monitoring the data of the indicator diagrams
通過固定在抽油桿上的位移-載荷傳感器實時採集油桿的位移數據和載荷數據，再採用微功率無線通信模塊通過串口將採集來的位移數據和載荷數據傳送至遠端的監控系統主機，用兩種數據形成示功圖曲線。The camber development mechanism and the influence factors were researched by geometry analysis, viscous analysis and sintering kinetics analysis. the camber model was established and the equation for calculating curvature of camber was proposed. the influence factors for camber involve the original size of composite, the sintering properties and the shrinkage mismatch between the two materials
從幾何學、粘彈性力學和燒結動力學的不同角度出發，探討了共燒翹曲形成機制和影響因素，建立了介電材料鐵氧體材料疊層共燒翹曲模型和翹曲曲率方程，揭示影響翹曲的因素為形狀尺寸因子，材料的燒結特性和異種材料之間的收縮率差，其中燒結過程的收縮率差是翹曲產生的根本因素，收縮率差越大，則翹曲曲率越大。Under this circumstance, our treasury bond market exits lots of shortfalls which impede further development for this market. in this essay, combining with the experience in developing country " s experience, it analyses some challenges which confronted chinese bond market, such as liquidity in the interbank market has yet to be improved, duration in bond products are yet to be rational, a sound yield curve is yet to be take shape, the separation between exchange and interbank yet to be broken. in order to solving above issues, this essay suggests that it should develop market maker system to increase market liquidity ; manage balanced treasury bond ; issue short and long term treasury bond in proportion to improve duration and yield curve ; develop bond derivative products such as future trading, open style repurchasement, so it can provides tools for risk protection
但隨著我國經濟的快速發展，金融市場已今非昔比，中國成為了世貿組織的成員，中國資本市場要走向國際化，利率的市場化是大勢所趨，在此前提下，我國國債市場還存在著很多不足，越來越阻礙著國債市場的進一步發展，本文結合世界發達國家的先進經驗，剖析了我國國債市場存在的一些問題如：流動性有待改善、國債期限結構不合理、無法形成科學合理的益率曲線、交易所市場與銀行間市場割裂等，為解決這些問題，本文建議應發展做市商制度以提高市場流動性；實施國債余額管理，發行短期國債及長期國債，改善國債期限結構，以形成科學合理的收益率曲線；發展債券衍生金融創新工具如國債期貨交易、開放式回購等，為投資者提供避險工具等等。In the procedure, the column is first divided into a finite number of small segments in equal length. the deflection - curvature relation of each segment is determined using the finite - difference method. the final nonlinear algebraic equations are then obtained by means of the equilibrium condition for each segment
運用這種方法，先將長柱離散成若干等長的柱段，利用差分方法求得各柱段截面上的撓度與曲率的關系，再根據各截面上外力與抵抗力的平衡條件，得到一組關于荷載與變形關系的非線性代數方程組；本文對該方程組採用載荷增量法進行迭代求解。There are a lot of work been done to the yield curve up to date, but the research can not keep up with the development of bond market. under such circumstances, this dissertation wants to do some researches focusing on the yield curve. first, the study observes the figures of yield curves of china bond during different periods and qualitatively analyzes how they have developed to such figures
研究思路:本研究首先定性考察了不同時期我國國債收益率曲線的形狀和成因，接著通過綜合以前的研究並結合收益率曲線的散點圖對不同時期收益率曲線分別建模，利用模型定量研判市場利率走勢，並對遠期利率作出預測，最後根據實證研究結果對國債投資和管理提供了一些結論和建議。In view of the external form of the roof construction, it was decided that the variant steel arched girder should be composed of a higher straddle and a lower straddle, with a stump welded between the two straddles. the straddles are two arc - shaped roofs of different curve rates, and each of the straddles is made up of segments of various curve rates
根據實際工程屋蓋建築的外形，確定變異鋼拱架分高跨和低跨部分，中間採用短柱焊接成一整體，高跨和低跨由兩個不同曲率的弧組成，且每一跨又有多個曲率。First according to the fact that tangential components of the evolution do not affect the geometric shape of the evolving curves, we introduce the evolution equation of geometric quantities for the general planar curves. then we describe the work of gage - hamilton briefly. last we consider a special curvature flow of curve which evolves with speed function of the principal curvatures along the inner norm and show that convexity of the curve is kept and its length and area are contracted if the initial closed curve is smooth and convex. so the final shape of the curve will be a point in finite time
首先根據曲線在切向分量上發展是不影響曲線的發展形狀，我們引入了曲線的一些幾何變量的發展方程；其次我們簡要地回顧gage - hamilton研究曲線發展的一般步驟；最後我們考慮沿曲線的內法線以曲率的函數為發展速度的一類特殊的曲線族，證明了在初始曲線為凸的閉平面簡單曲線條件下，曲線將保持凸的，並且它的面積和周長將同時收縮，並在有限時間內成為一個點。Abstract : based on the hypotheses of three - piece straightening curve. it isverified that the method for using little deformation condition was true with accurate solution of three - piece straightening curve. the mechanics behavior of slab was analyzed in regard to the creep properties of high temperature slab. the results show that the strain, the strain velocity and the stress varied so smoothly that the inner crack was prevented. technical renovation is carried on by adjusting the displacement of rolls and by using the accurate solution of three - piece straightening curve
文摘:基於三段矯直曲線應變速率的假設，通過計算三段矯直曲線的精確解，驗證了使用小變形條件的正確性;考慮高溫鑄坯蠕變性能，對鑄坯的力學行為進行了分析，得出了使用三段矯直曲線方法，鑄坯應變速率、應力及應變在矯直區內變化較為平緩，可有效避免鑄坯內裂紋的形成;使用本文三段矯直曲線精確解，調整輥列位置，可進行連鑄機的在線技術改造。In the layout design of the power device, a circular structure was adopted to avoid the spherical junction and reduce the curvature effect
該功率器件的版圖設計為圓形結構，避免了球面結的形成，有效的降低了曲率效應造成的電場集中。As a basic energy of our counrry. the determination of calorific value of coal is very important to the excavation and efficient exploitation of energy. the traditional method of determination has many complicated coursese and always needs much work made by man. so the research of automatic calorie meter makes significentthrough the detailed analysis of principle and method of measurement, an automatic measuring instrument controlled by microcomputer is designed in this paper in order to take the place of manual operations. the instrument can almost do every operation by itself, such as the control of experimental progress, data collection, data computation and the printout of experimental results. furthermore, a distributing system of measurement building on field bus is designed too. under the control of personal computer, several calorie meters can work independently and simultaneously. on the other hand, a powerful measuring and control software is developed using visual computer language - visual basic and visual c + +
設計不但能自動完成整個實驗過程的控制和實驗數據的自動採集，並且能自動完成數據計算和實驗結果的列印輸出。在此基礎上，本文進一步設計出了基於現場總線技術的分散式測試系統，將多臺自動熱量計置於一臺pc機的控制之下，極大地提高了測量的效率。並利用可視化語言visualbasic和visualc + +設計出功能強大的系統監控軟體，以動畫和實時曲線的形式動態模擬出整個實驗的進程（包括故障顯示） ，使得整個測量工作自動化、智能化。The existence of pzt has bi - directional effects on the conductive circuit of vgcf, which leads to an evident semi - conducitve plateau area in the electrical conductive curve
由於pzt的存在對vgcf導電網路的形成具有雙重的作用，這反映到電導率隨vgcf體積分數的變化曲線上，則是在半導區存在一個明顯的半導區平臺。Secondly, the study develops different mathematical models according to different periods by synthesizing previous research and observing the track of scatter plots of yield curves. thirdly, it quantitatively predicts the trend of interest rate and forward interest rate by these models. last but not the least, this study come to some conclusions and present some suggestions according to the empirical research
本研究首先定性考察了不同時期我國國債收益率曲線的形狀和成因，接著通過綜合以前的研究並結合收益率曲線的散點圖對不同時期收益率曲線分別建模，利用模型定量研判市場利率走勢，並對遠期利率作出預測，最後根據實證研究結果對國債投資和國債管理提供了一些結論和建議。分享友人