Powerformer have some changes in constract with the conventional generator ， subsequently it also have some new problems in order to have an economical ， efficient ， credible development and application the structure and the philosophy of electromagnetism of powerformer will be on speaking terms changes electrical design ， magnetism design ， thermal design and structural design are have some new changes above all ， the electromagnetism parameter and the harmonic magnetomotive force of powerformer are studied in this paper first ， it mainly utilizes analytics to deduce formula of slot leakage reactance it considers three instances ， including monolayer - slot ， multilayer isometric - slot and multilayer anisometric - slot then ， the analytics and the fem are utilized to calculate slot leakage reactance of stator winding of prototype of powerformer and compare their results second ， the theory of utilitzing fem to calculate the reactance of powerformer is simply introduced ， including stable reactance ， transient and subtransient reactance specially ， the saturated influence of the stable reactance is considered then ， the results are analysed final ， it mainly introduces the influence of harmonic magnetomotive force of stator winding and analyses the harmonic magnetomotive force of stator winding then ， it mainly analyse harmonic magneto - motive force of stator winding through arranging various arrays of stator winding and observe their influence
基於上述原因，本文對powerformer的電磁參
數以及定子
繞組諧波磁勢進行了研究。首先是用解析法推導出powerformer定子
繞組槽漏抗的計算公式，考慮了單層圓形半閉口槽、多層等半徑圓形半閉口槽和多層不等半徑圓形半閉口槽三種情況，並對powerformer樣機的定子
繞組槽漏抗用解析法和有限元法進行了計算，並比較其結果；其次，簡要介紹了有限元法計算powerformer電抗參
數的原理，包括穩態電抗、瞬態電抗和超瞬態電抗，對穩態電抗考慮飽和影響，對結果進行分析；最後，介紹定子
繞組諧波磁勢對電機運行性能的影響並對定子
繞組諧波磁勢進行了分析。然後通過對定子
繞組進行不同排列來分析定子
繞組諧波磁勢，看看
繞組排列對諧波磁勢的影響。
In this thesis, the author analyses the deficiency in detecting and controlling function of the computer detecting and controlling system utilized in present transforming station. the strategy of design of software on operation and direction of 5 00kv transformer station is presented. it points out that we can deduce the mathematic analytical formula using the current, voltage and power of two terminals of transmission line as input. on this basis, we do realtime calculation of 500kv transmission line ' s parameter. we can also deduce the linear analytical formula of three - winding autotransformer ' s resistence using its current, voltage and power as input. the corresponding software is programmed on this basis
論文提出以輸電線路本端和對端電流、電壓、功率作為輸入量，導出了超高壓長線的波阻抗和傳播常
數的
數學解析式，在此基礎上進行了500kv輸電線路實時參
數計算；提出以三
繞組自耦變壓器的電流、電壓、功率為輸入量，導出了自耦變壓器
繞組的電阻、電抗的線性解析式並進而對變壓器的實時參
數進行計算；在此基礎上編制了相應的軟體。
Then, the program is used to simulate the flow across the backward - step, and the conclusion is testified that the circumfluence length is related to the reyonlds number
同時，利用程序對后臺階
繞流流動進行計算，驗證了后臺階
繞流迴流長度和雷諾
數有關的結論。
2 ） this paper research mainly the influence of the cluster satellite circumnavigation 、 earth - rotation 、 satellite attitude to the baseline variation and the speed measurement accuracy, and give the correcting mathematical formula and the relative curvature
2 ） 、著重分析分散式衛星sar系統中衛星環
繞、地球自轉、衛星姿態對基線、測速精度的影響，並繪出了相應的
數學模型及關系曲線。
The sensitive time lag theory circumvents the problems inherent in the description of unsteady combustion by use of a simplified two-parameter response function.
敏感時滯理論用簡化的雙參
數響應函
數來描述不穩定燃燒，從而
繞過了某些固有的難點。
Much of the law surrounding equality ( including the fourteenth amendment itself ) was conceptualized around the idea of race
多
數圍
繞平等（包括第十四修正案自身）的法律概念是在種族的觀念下形成。
According to the analysis and comparison for existing wireless data traffics, a wireless bonding mode is adopted to realize mobile ticketing. the thesis also researches the safety issue on railway wireless ticketing system and put forwards the corresponsive solution. a series of safety techniques, for example data encryption, are adopted to ensure the safety of transaction between the wireless ticketing terminal and railway ticketing system
本論文圍
繞無線接入技術展開討論，通過對現有無線
數據業務的分析比較，確定無線接入方式，實現移動方式的鐵路售票系統；研究鐵路無線售票系統所面臨的安全問題並提出相應的解決方案，在軟硬體結構設計中採用了一系列安全技術，並輔以科學的管理方法，使無線售票系統具備一定的安全防護能力。
Local wars and bandits often blocked their travel, making countless detours necessary.
內戰和盜匪也常阻擋他們前進，迫使他們
繞了無
數彎路。
The 3 - d complex flowfield of rocket - missile with wings and empennages induced by the interaction between by base jet and the flow around the body has been numerically simulated. the main work is as follows : first, the gordon - mcbride program was developed to make it more friendly and efficient to the users
本文對帶彈翼/尾翼彈箭的三維噴流
繞流復雜流場進行了
數值模擬，其主要研究內容有：首先，對gordon - mcbride火箭程序作了改進，使改進后的軟體具有了非常友好的人機交互界面。
Cylinder radial twisting enlacing machine is an upgrading generation of packaging machine with the function of simple operation, high automatic degree and the layer number of twisting is adjustable so as to reduce the wastage of the products
圓筒徑向纏
繞捆紮機是包裝升級換代的機型，操作方便、自動化程度高，纏
繞層
數可調，並大大降低產品的損耗。
Monroe discovered that the earth was surrounded by several rings, or bands, that appeared deep grey or brown in color, and that these bands were occupied by discarnate or exteriorized entities who either still occupied physical bodies or who had recently left their bodies as a result of the death of the body
門羅發現，地球被
數個環或帶所環
繞，顏色顯現為深灰色或褐色，這些環帶被非肉身的或形象化的實體所佔據，他們不是依然占據肉身，就是因肉身死亡而剛離開他們的身體。
The thesis centered on the topic. a fluid drive program of the sugarcane mill is made. it is a must to have the digital simulation study on the hydraulic system
本文圍
繞研究課題，展開研究工作，制定了甘蔗壓榨機的液壓傳動系統方案，建立其
數學模型，並對模型進行了靜、動態特性
數字模擬研究。
This paper discusses about collective management of copyright under the digital environment
本文緊密圍
繞數字環境探討版權集體管理。
The article describes the features and good points of digital fashion paintings and recalls systematically the development of digital fashion paintings
摘要圍
繞數碼時裝畫與服裝專業教學，闡述了
數碼時裝畫的特點和優勢。
To analyze the new environment with the information constructed from data warehouse. problems those exist in the information analysis activities are analyzed. the features of the data warehouse are discussed, as well as why
第2章利用
數據倉庫構建信息分析新環境:從信息分析的角度指出在目前的決策支持系統中開展信息分析存在的問題，分析了存在這些問題的原因，並圍
繞數據倉庫的特點展開討論，論述了為什麼要在
數據倉庫的環境下開展信息分析。
The work presented in this paper is carrying out to the theory research of dbf. the work includes : research of dbf algorithms, dbf antenna system composition and realization. the application of dbf algorithms used in high frequency ground wave radar for near ocean inspection and ocean situation remote sensor is also presented. at last, we give a effective scheme to implement broad - band constant beamwidth digital beam - former
本文的主要工作是圍
繞數字波束形成技術的理論研究，內容包括：
數字波束形成演算法的研究，
數字波束形成天線的系統構成和實現，以及將
數字波束形成演算法應用於高頻地波雷達近海監測和海態遙感，最後給出了一種寬帶恆定束寬
數字波束形成器的設計方案。
At present, there is no cad / cam software for non - axisymmetric filament winding in china. this paper researches into method to design fiber paths of non - axisymmetric filament winding, generalizes splines in traditional cagd, successfully applies them to the fiber path design of winding elbows, presents mathematical principles and methods of winding elbows, and develops a cad / cam system for elbow fabrication
本文研究了非軸對稱纏
繞的纖維路徑設計方法，推廣了傳統cagd中的樣條技術，並成功地應用於纏
繞彎管的路徑設計中；提出了復合材料彎管的纖維纏
繞數學原理和方法，並研製開發了一套纏
繞彎管cad cam系統。
For decades, the application on data becomes more and more expanding along the development of it. from traditional mis to current dss and erp / mrp, it has enhanced the efficiency of the management and production of the enterprise greatly. accompanied the implement of this technology, the network makes the management information system popular, whereas it brings the problem of data safe transmission
近十年來，信息技術的發展使得圍繞數據方面的應用越來越廣泛，從傳統的mis到今天的dss （決策支持系統）和erp mrp （企業需求計劃管理） ，都使企業的管理和生產效率獲得了實質性的提高。
