近地點引數 的英文怎麼說
中文拼音 [jìndediǎnyǐnshǔ]
近地點引數
英文
argument of perigee-
Last test was done in july 1998 and the results confirmed that air quality within the measured location complied with the guideline values recommended by environmental protection department. furthermore, air ducts are cleaned periodically
最近一次測試在1998年7月完成，結果證實在測量地點范圍內的空氣質素符合環境保護署建議的指引度數。此外，本局會定期清潔空氣管導。First, average nearest distance ( r ( subscript e ) = 1 / 2 ( n / a ) ( superscript 1 / 2 ) = 1 / 2d ( superscript 1 / 2 ) ) is employed to observe the spatial structure of shanxi tourist attractions. the result of calculation shows the special distribution of shanxi tourist attractions is average in the whole space, agglomeration in the key space
本文以山西省假日旅遊統計的24處重點旅遊區（點）為分析樣本，用鄰近地理指數理論得出山西旅遊吸引物在地理空間分佈上呈大分散、小聚集的總體特徵。Only clouds of points instead of grids are distributed over the computational domain and the spatial derivatives of the considered partial equations are estimated using a least - square curve fit on local clouds of points
與傳統的網格方法不同，無網格方法的核心是用「點雲」離散求解區域，並基於當地點雲離散結構，引入二次極小曲面逼近空間導數。Multi - channel deconvolution, based on multi - channel signal analysis, is presented to recover receiver function from three - component teleseismic p waveforms clustered within certain backazimuth and epicenter distance, to increase the resolution of receiver function. wavelet inversion is also introduced to broadband receiver function, to solve for nonuniqueness cased by linear approximation of nonlinear problem, and broadband receiver function is decomposed into multi - resolution versions, and the inversion result for the low - resolution version is iteratively taken as the initial model for the high - resolution, and gradually obtain the inversion model for broadband receiver function
為克服廣義線性反演對初始模型的依賴性，並保持其快速收斂的特點，本文首次將小波變換引入到接收函數波形反演，將接收函數分解到不同的分辨尺度上，分別進行廣義線性反演，並將低解析度的反演結果作為高解析度反演的初始模型，漸近地獲取寬頻帶接收函數的模型，克服了非線性問題線性化帶來的非唯一性。Withal, basing on study on the domestic and foreign farmland appraisal, on introduction land resource use trait in outskirts hill chongqing, the thesis introduces firstly international all - purpose five principles of sustainable land use management, exerts delphy to accept or reject repeat index elected, manages ahp and dsr to demonstrate system with bishan of representative outskirts hill county chongqing as a sample, studies on farmland appraisal index system of outskirts hill chongqing, and looks forwards to favoring farmland appraisal work of chongqing and doing indeed southward hill zone. the central conclusion as follows : 1 in the background of town land appraisal constantly perfect in our country, the cultivated land value management, as the part of land market, is more and more important
對此，本文在分析國內外農用地分等定級研究的基礎上，通過對重慶市近郊丘陵區土地資源利用特點的詳細介紹，引入國際上通用的持續土地利用管理的五大原則的基本框架，運用特爾斐法對所選指標進行多輪取捨，結合層次分析法、 「推動力?狀態?反應」法等數學方法，以重慶市典型的近郊丘陵縣? ?璧山縣為體系論證樣點進行體系論證，就重慶市近郊丘陵區農用地分等定級指標體系作以研究，以期對重慶市乃至南方丘陵地帶農用地分等定級工作的開展有所裨益。The number of the hidden layers of mul - tilayer perceptrons ( mlps ) is analyzed, and three - layer perceptrons neural network is adopted ; by analyzing the mechanism of the neural cells in hidden layer, a method for combining genetic algorithm and bp algorithm to optimize the design of the neural networks is presented, and it solves the defects of getting into infinitesimal locally and low convergence efficiently, it can also solve the problem that it can usually obtain nearly global optimization solution within shorter time through using genetic algorithm method lonely ; several examples validate that this algorithm can simplify the neural networks effectively, and it makes the neural networks solve the practical problem of fault diagnosis more effectively
對多層感知器隱層數進行了分析，確定採用三層感知器神經網路;通過對隱層神經元作用機理的分析，引入了遺傳演算法與bp演算法相結合以優化設計神經網路的方法，有效地解決了bp演算法收斂速度慢和易陷入局部極小的弱點，還可以解決單獨利用遺傳演算法往往只能在短時間內尋找到接近全局最優的近優解的問題;通過實例驗證了這種演算法能夠有效地簡化神經網路，使神經網路更加有效地解決實際的故障診斷問題。The dissertation refers to comparatively full literatures in the field of vsc, and the development history and characteristics of vsc are summarized, and the elementary concepts, elementary definitions, elementary properties, elementary principles and design methods are particularly introduced, and the causes of the chattering phenomenon are systematically analysed, and the study status of the chattering phenomenon and the main methods to eliminate the chattering are elaborated. for the deficiencies of traditionary methods, three improved methods are developed, which are improved exponent reaching law solution, variable boundary layer solution and the solution by adding an auxiliary continuous control term. for uncertain linear systems, an adaptive fuzzy integral variable structure control stategy ( afivsc ) is put forward to eliminate the chattering around the sliding plane, which introduces fuzzy logic to soften the non - linear discontinuous sig nal in the control variable and utilizes adaptive theory to adjust output membership function according to how much the uncertainty of the system is
比較全面地查閱了關于變結構控制理論的文獻，總結了滑模變結構控制的發展歷史和特點，詳細介紹了變結構控制的基本概念、基本定義、基本性質、基本原理以及設計方法；系統分析了變結構控制系統抖振產生的機理，並闡述了國內外目前對抖振問題的研究現狀以及消除抖振的主要方法；針對傳統抑制和消除抖振方法的不足，改進了傳統方法，得到了三種新的消除抖振的方法? ?即改進的指數趨近律法、可變邊界層法和附加連續項法；針對不確定性線性系統，在變結構控制策略中引入模糊邏輯和自適應理論來消除滑動平面上的抖振，提出了一種自適應模糊積分變結構控制方案（ afivsc ） ，利用模糊邏輯來柔化控制量中非線性不連續部分，採用自適應理論，根據系統不確定性大小在線調整模糊輸出量的隸屬函數，另外，鑒于模糊控制本質上是有靜差的，所以本文選擇了帶積分項的切換函數，由於積分項的存在使系統較正為無靜差系統。The study on the behavior of semi - rigid joints in steel - concrete composite frames gets widely attention recently. a high degree of continuity can be achieved at a very low cost just providing the slab with rebar running along the column. furthermore, stiffness and ultimate resistance can be controlled in a rather simple way by a suitable selection of steel connection detailing and amount of reinforcement
鋼-混凝土組合框架中半剛性組合節點性能的研究近來引起了廣泛的關注，這種節點形式花很低的成本就可以通過混凝土板內的縱向鋼筋實現組合梁在不同跨之間的連續性，而且通過選擇合適的型鋼樑柱連接方式和縱向鋼筋數量，可以有效地控制節點的剛度與承載能力。Since introduction of the accountability system on 1 july 2002, the new labour branch ( lb ) of the economic development and labour bureau, with an establishment of 9 staff, has been housed in the headquarters of ld. in view of the close working relationship and physical proximity between lb and ld, the environmental policy and measures mentioned in the following sections of this report are applicable to the lb
自二零零二年七月一日推行問責制后，新成立的經濟發展及勞工局轄下的勞工科便設于勞工處總部，其編制共有9名職員。由於勞工科和勞工處的工作關系緊密和辦公地點相距頗近，本報告以下部分所述的環保政策及措施將適用於勞工科，而所引述的環保成效統計數字亦已一併計及勞工科的數字。分享友人