time gradient 中文意思是什麼
time gradient
解釋
時間梯度-
By two ways, this paper debates the theory of fracture detection : on one hand by the way of edge detection in image processing ; on the other hand by time series analysis. the detection by time series analysis is more antinoise than edge detection in image processing. edge detection theory in image processing mainly includes correlation data, fuzzy edge detection, entropy operator edge detection and gradient edge detection
圖像處理中的邊緣檢測的方法主要包括相干數據體法、模糊邊緣檢測法、基於熵運算元的邊緣檢測法、梯度邊緣檢測法；其中模糊邊緣檢測法比較依賴于參數的選擇，其渡越點兩邊的像素區別明顯；熵運算元的檢測方法則是檢測的圖像邊緣比較光滑，連通性好；梯度檢測法可以使用不同的運算元核，演算法比較簡單；相干數據體對于總體的大的裂縫的分佈具有比較奸的反應。 -
Downhole temperature profiles have been simulated under different conditions of fluid output, production time, off production time, formation parameters, geothermal gradient, bed thickness, welibore radius and so on, and simulation results are analyzed and discussed
本文模擬了產液量、生產時間、停產時間、地層參數、地溫梯度、層厚及井筒半徑等不同條件下的井下溫度場分佈，並對模擬結果進行了分析和討論。 -
Coniferous forests, at the same time, the transect was divided 5 gradient ( 18 km / per ) using esri ' s arcview 3. 2
同時藉助于gis軟體arcview對研究樣帶進行人為等距離（ 18km ）劃分為5個梯度區。 -
According to those analysis and the background of geological evolution of basin, the kind of hydrodynamics was regarded as compaction before y3 and then as compaction - osmosis after y3. futhermore, the key time of oil and gas reservoir formation was summarized, it is furthermore, the main cause of high pressure formation was believed that the compaction was not enough in paleogeothermal gradient, meanwhile, analyzing the cause of the low pressure nowadays, it was the uplift and erosion of stratum or pressure divulgence because of seal and so on
另外，還確定油氣成藏的關鍵時期為伊敏組沉積末。再者，認為欠壓實是最大埋深狀態下，超壓形成的主要原因，同時分析了形成現今負（低）壓的原因，其原因為地層抬升剝蝕、壓力因封閉層的泄漏等。最後，恢復出各主要目的層的古流體勢的演化歷史，從伊敏組末至現今，油勢分佈特徵具有較好的繼承性。 -
Using the system designed in this thesis work, flow field calibration of the wind tunnel is accomplished, which covers dynamic pressure drop coefficient, dynamic pressure time stability, axial static pressure gradient, boundary layer, and degree of turbulence, etc. boundary layer measuring principle and method are especially described in detail, the relationship between boundary layer thickness, wind speed setting, and the depth of the experimental section is summarized, and finally the calibration data for th e model center zone under specific wind speed are given
然後利用本文設計的系統完成了落差系數、動壓時間穩定姓、軸向靜壓梯度、邊界層及湍流度等內容的流場校測。特別對邊界層測量的原理及方法做了較詳盡的敘述，總結出邊界層厚度與設定風速、實驗段深度的關系，然後給出模型中心區一定風速下校正數值。 -
Stress which three portal frames of dairy housing bore under different conditions was analyzed and relations between different post distance, roof gradient and structure internal force capability and steel dosage were obtained. at the same time, the structural section was optimized with float stress exponent method to lower steel dosage
通過程序，對牛舍三種門式剛架結構在不同工況下進行了應力分析，分析了不同柱距、屋面坡度與結構受力及結構用鋼量的關系，並用準則法中的浮動應力指數法對優選出的結構進行了截面優化，達到了降低結構用鋼量的目標。 -
According to more effect, when the hore component is placed in a gradient field, at the same time the direction of the current is perpendicular to the direction of the voltage, then between the two parallel side face come out the hore voltage. when hore component is set in this kind of uni - gradient magnetic field and the electric current is unchanged, the voltage output of hore component will be proportional to the position of the hore component in the magnetic field. so we can use the hore component to measure the movement of hore component against magnetic field
根據霍爾效應可知，置於磁場中的霍爾元件若電流方向與磁場方向垂直，則在霍爾元件垂直於磁場和電流方向的兩個側面將產生電勢，將霍爾元件置於強度隨空間位置線性變化的磁場中，且控制電流恆定，輸出就正比于霍爾元件處于磁場中的位置，因此可以用霍爾元件來測量磁場與霍爾元件間的相對位移量。 -
According the key factors we find, we bring forward a new conception : multilevel suppressor and design a new high performance suppressor whose ion - exchange membrane has bigger areas and using three electrodes including one cathode ( anode ) and two anodes ( cathode ), at the same time we fill the suppression compartment with one kind of ion exchange resin which has moderate exchange capacity. according to our experiment ' s results, we find the new type suppressor has quite high working current efficiency and suppressing capacity. in most cases, the suppressor ' s current efficiency is over 90 % ; the suppressor can transform the naoh ( concentration : 200mmol / l, flow rate : i. oml / min, conductance : over 10000 i - i s cm " ) to pure water ( conductance : 8. 9 it s cm in chapter 3, the high performance suppressor is applied in determination some trace - amounts ions in plating solution, sewage. in this chapter, we also have a research on the gradient ion chromatography
第二章首先以xyz - 1型電化學抑制柱為例，分析了電化學抑制柱的抑制過程得出影響抑制容量的主要因素主要是抑制柱的電流效率和離子交換膜的極限電流密度，因此採用中等交換能力的離子交換樹脂作為抑制室的填料以提高電流效率，在通常情況下電流效率可達到90以上；在選用同種離子交換膜的前提下，可通過增加離子交換膜的有效面積達到提高極限電流的目的從而提高抑制柱的抑制容量，因此提出了多級抑制的概念並據此研製了共電極式高容量電化學抑制柱，該抑制柱最高可將流速為1 . 0ml / min ，濃度為200mmol / l電導率超過10000 s ? cm ~ （ - 1 ）氫氧化鈉溶液抑制為電導率低至8 . 9 s ? cm ~ （ - 1 ）的純水，並且具有穩定性高、分析結果準確等優點。 -
( 2 ) a series of experiments on time scale distortion are made with real river model, inflow and outflow boundary condition, and continuous simulation. by means of analysis of the experimental data on model water level, water - surface gradient, cross velocity, outflow discharge process and the sediment transportation capacity, the main physical reasons for the above hydraulic parameters deviations caused by time scale distortion are illustrated : response delay of model channel storage capacity and rate of water level with time
（ 2 ）採用真實的河工模型和入出流邊界控制條件以及連續模擬的方法進行了有關時間變態率的系列試驗，通過模型水位、比降、流速、出口流量過程線和斷面挾沙力試驗資料的分析，闡明了時間變態引起上述各種水力參數偏離的主要物理原因：模型的槽蓄響應和洪水過程時間變化率的響應滯后。 -
The treatments simplifies greatly the solution programs which are often performed to solving non - homogeneous equation and second order differential equation on the thermal equilibrium and gradient relationship and the workload of numerical computation at same time
這類方法大大簡化了人們在分析壓電熱彈性體耦合問題時通常要求解的非齊次微分方程和關于溫度的平衡方程和導熱方程的二階微分方程的繁瑣方法，同時，齊次狀態方程的提出大大減少了數值計算的工作量。 -
We discussed the main characteristic parameters of seismic kinesiology and dynamics of mine engineering fracture zone, including relative amplitude, phase time of wave crest, similarity factor, principal frequency band energy, 3 - d space time gradient and coherent coefficient et al., and puts forward the processing method of 3 - d seismic characteristic parameters about denoise - smoothing, generalization, correlation analysis, characteristic transformation ; and presents the method of pattern recognition of mine engineering fracture zone
摘要本文從時間域、頻率域、三維空間域介紹了礦山工程裂隙破碎帶主要的地震運動學、動力學屬性參數，包括相對振幅、波峰相位時間、相似系數、主頻帶能量、二維空間時間梯度和相干系數等，提出了礦山工程裂隙破碎帶三維地震屬性的去噪平滑、歸一化、相關分析、特徵變換的處理方法以及裂隙破碎帶的模式識別原理與方法，並用實例說明了該方法的應用效果。 -
2 both least mean - square ( lms ) and least - square ( ls ) blind space - time receivers methods based on the rosen ' s gradient projection are presented for space - time receiver that merge with the idea of smart antenna, and combined with the different data - selected schemes. the effect of these schemes on the computational complexity of two detection methods is analyzed. the simulations illustrate that those methods are effective
2 、針對將智能天線的思想融入其中的空時接收機，提出了基於rosen梯度投影實現的最小均方（ lms ）與最小二乘盲空時接收機演算法並將提出的不同數據方案結合起來，分析了提出的方案對每次迭代運算的運算量的影響，通過模擬實驗驗證了方法的有效性。 -
It was found that the interface morphology of ni, cr, al - tac eutectic in - situ composite evolved from plan to cell and then to dendrite with the increase of solidification rate, if the gradient retained constant. in the same time, the eutectic microstructure also evolved from rod to cell and then to dendrite
本工作發現，在溫度梯度基本保持不變的條件下，隨著凝固速率的增大， ni ， cr ， al - tac共晶自生復合材料的凝固界面由平界面向胞狀及枝狀界面逐漸轉化。 -
3 a novel recursive least - square ( rls ) blind space - time receiver algorithm based on the constrained condition, which can completely avoid the matrix inversion introduced into by constraints ( comparing with the normal rls ), is proposed for multi - path slow fading cdma channels. the computational complexity of this method is not only lower than that of the normal rls, but also lower than that of both lms and ls blind space - time receiver methods that are realized based on the rosen ' s gradient projection. and the speed of convergence of the presented rls blind space - time receiver algorithm is better than that of both lms and ls blind space - time receiver methods
3 、針對多徑慢衰落通道下ds - cdma盲空時接收機中線性約束二次規劃問題提出一種新的遞歸最小二乘演算法，該演算法完全避免因約束而引進的矩陣求逆運算（相對于常規的遞歸最小二乘演算法） ，不但運算量比常規的要低，而且比基於rosen梯度投影實現的最小均方（ lms ）與最小二乘盲空時接收機演算法還低，且收斂速度比基於rosen梯度投影實現的最小均方（ lms ）與最小二乘盲空時多用戶檢測都好，將提出的新的遞歸最小二乘演算法與提出的數據選擇方案結合起來可以進一步降低其運算量，具有很大的實用價值，最後通過模擬實驗進一步分析了其性能。 -
This paper discuss a modeling and predicting means for nonlinear systems proceeding from nonlinear systems modeling and predicting theory, whch is based on drnn model. this means overcomes the fact that ar model is used only in linear systems, at the same time it connects itself with approximation theory symbolic statistics and conjugate gradient algorithm, and formulate a system of large watercrafts motion modeling and predicting which is based on drnn model, and simulate it
本論文從非線性系統建模與預報的理論及應用觀點出發，系統地闡述了一類適用於非線性系統的建模預報方法? ?基於drnn模型的建模預報方法，克服了ar模型僅局限於線性的情況，同時結合逼近論、數理統計等知識，運用共軛梯度演算法，提出並建立了基於對角回歸神經網路的大型艦船運動建模預報系統，並進行了模擬。 -
This is the first time to utilize the method to simulate two - dimensional impedance gradient flier quasi - isentropic compression and launch the flier to hypervelocity in our country
我們給出的計算結果與sandia實驗室超高速發射實驗模型的實驗結果和cth程序計算結果是一致的。 -
Application of gradient algorithm in time - varying control of rotor vibration
具有魯棒性的一種時變參數估計演算法 -
Convergence of forgetting gradient estimation algorithm for time - varying parameters
時變參數遺忘梯度估計演算法的收斂性 -
The experiments reveals that : the amount of water vapor transfer is affected by both water content gradient and the value of water contents, when the water content of one end is approximate, the water content gradient increases, then the amount of water vapor transfer increases ; when the water content gradients are approximate, the amounts of water vapor transfer can get great differences if the water contents are different, under this condition when the water content of the dry soil is very little, the amount of water vapor transfer is much greater ; the differences of density hav n ' t great effects on water vapor transfer, but have some effects on the admixture transfer, when the density is smaller, the amount of admixture transfer is greater. the water vapor transfer finishes more quickly and need less time, and the liquid water finishes more slowly and need less time
當一端含水量一定時，增加含水量梯度，則氣態水遷移量增大；當含水量梯度相近時，氣態水遷移量隨含水量不同可能相差很大，這種情況下當較干段含水量特別小時，氣態水遷移量相對較大；密實度的大小對于氣態水遷移的影響並不明顯，但對液態水和氣態水的混合遷移有一定的影響，在相同的實驗時間內，土體密實度較小，則混合遷移量相對較大；氣態水遷移完成速度較快，所需時間較短；液態水遷移完成速度較慢，所需時間較長。 -
At the same time, tip leakage induced by pressure gradient and relative motion between the blade tip and the shroud wall is found to have a major influence on detailed flow properties in tip region of rotor passage
同時，由於轉子葉片壓力面和吸力面之間壓力梯度以及葉頂與機匣之問的相對運動產生的間隙流對轉子通道內的細微流動結構有較大的影響。
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