拓撲量子數 的英文怎麼說
中文拼音 [tàpūliángzishǔ]
拓撲量子數
英文
topological quantum number-
A real physical system may involve many variables but only one or more of them can be detected by modem data collecting equipment in recent years, the technique of phase space reconstruction is frequently applied to analyse and process time series. its significance is that the topological characteristics such as fractal dimension can be obtained, on the basis of investigation and research about the technique of phase space reconstruction up - to - now, this paper is also devoted to develop a new method for the prombles of detecting deterministic chaos of time series obtained from experimental data
一個實際的系統可能會涉及多個相變量,但在實際問題中只能得到部分相變量的信息,近年來人們發展了相空間重構方法,能夠通過單變量信息重構吸引子,這種方法在時間序列分析和處理中得到廣泛應用,其意義在於能在拓撲等價意義下恢復吸引子的拓撲特徵,本文第三章在國內外有關時間序列的相空間重構研究狀況基礎上,致力於發展對時間序列進行確定性檢驗的新方法,即研究時間序列的分佈規律和赫斯特指數,並在相空間重構的基礎上,提取吸引子的特徵指數。The molecular structure of alkanes is described by anovel molecular subgraph coding method, recently developed in this laboratory. it has been shown that there exist very good quantitative structure property / function relationships ( qspr / qsfr ) between the coding and 7 thermodynamical functions and 8 physical properties of alkanes
在拓撲不變量的基礎上直接將子圖分類、計數、編碼,提出了一種新分子拓撲子圖指數,已數字化的子圖編碼部分保持具體分子結構的直觀信息。In the laboratory experiment part, human peripheral blood, cultured cells and icr mice were study objects. the changes of mitotic chromosome numbers were measured by human metaphase chromosome counts and statistic analyzed used x2 - test. the changes of meiotic chromosome numbers were measured by mice one - cell zygote chromosome counts and statistic analyzed usedx2 - test. the effects of low dose ionizing radiation on the expression of topoisomerase ii were measured by immunocytochemistry, western blot and rt - pcr
流行病學結果顯示長期小劑量輻射接觸與染色體不分離呈正相關,為進一步在細胞遺傳學和分子生物學方面研究小劑量電離輻射與染色體不分離關系及其機制,本課題第二部分以外周血、培養細胞、 icr小鼠為研究對象,用外周血染色體計數和單細胞受精卵染色體計數的方法研究小劑量輻射和拓撲異構酶復旦大學2000級博士生學位論文11a抑制劑及其二者的協同效應對有絲分裂和減數分裂染色體不分離的影響,用免疫細胞化學染色、 westernblot 、 rt pcr等方法研究了電離輻射引起拓撲異構酶a表達變化。Established in 1999, bluetop technology, the leading manufaturer of mpeg2 transport stream test & measurements in digital tv market, is specialized in providing high performanced tools to worldwide broadcasters, stb manufactures, dtv labs, etc
北京藍拓撲電子技術有限公司成立於一九九九年二月,致力於為用戶提供高精度、高可靠性的數字電視測試設備和解決方案,是領先的數字電視測試測量設備和方案的專業提供商。In order to improve the agility of integration system, this paper analysis the fault effect of heterogeneous data flow in the integration system ; design the integration mode of agile system ; the evaluation is done base on the integration mode ; the gateway system technology is proposed to integrate the heterogeneous system ; also this paper carries out the concept of gateway system, the topology of gateway system, the data filter protocol in the gateway system, the data filter protocol algorithm, the data flux in the gateway system and the work capability of gateway system.
本文以提高系統敏捷性為目標,在大規模、復雜、動態進化系統環境下,考慮了大量需要交互的數據的異構性對敏捷系統性能造成的不良影響,設計了敏捷系統集成模型,並且對這個模型作了評價。在集成異構系統時採用的關鍵技術是網關系統技術,本文詳細討論了網關系統的概念,網關系統的網路拓撲結構,數據過濾協議,數據過濾演算法,網關系統中網關節點中的數據流量及網關系統的工作能力,有利於保證集成子系統服務質量的要求,在一定程度上解決了上述單節點網關存在的缺點。Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent
本文首先介紹了異步電機的數學模型,在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理,採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹,詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究,包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時,選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量,解決了扇區切換時的矢量突變問題。A quantitative relationship between the separation factor and the bonded - phase molecular topological index for fullerenes is established
建立了富烯勒的分離因子與鍵合相分子拓撲指數間的定量關系。Chapter one has introduced the background and classification of minimax theorems ; chapter two summarizes several proof method of minimax theorems, which are illustrated with examples ; chapter three has explained the development general situation of minimax theorems for a function and for two functions with chapter four respectively, and according to the classification of the theorem, has illustrated some important conclusionses in quantitative minimax theorems, topological minimax theorems and quantitative - topological minimax theorems separately
第一章介紹了極大極小定理的背景及其分類;第二章總結了極大極小定理的幾種證明方法,並舉出例子進行說明;第三章和第四章分別闡述了單函數的極大極小定理和兩個函數的極大極小定理的發展概況,在第三章中,按照極大極小定理的分類,分別對數量極大極小定理,拓撲極大極小定理和數量拓撲極大極小定理的一些重要結論作了介紹。分享友人