逆變質 的英文怎麼說
中文拼音 [nìbiànzhí]
逆變質
英文
inverse metamorphism-
Based on the studies of petrotexture, structural deformation and the relevant metamorphism, this paper indicates that this peridotite massif is the product of ultramafic magma cumulated at the crust - mantle transtion zone and has undergone the early stage of plastic deformation under the condition of granulite facies （ 800 ） and late ductile shearing at amphibolite and greenschist facies in relevance to uplifting
本文通過巖體的結構、構造變形及相應的變質作用研究，提出了該橄欖巖體是由超基性巖漿在殼幔過渡帶結晶而成，並經歷了與圍巖一致的麻粒巖相（ 800 ）條件下的早期塑性變形以及角閃巖相和綠片巖相退化變質條件下與逆沖上升有關的韌性剪切變形。The properties of the and variation functions are generalized to the generalized regular variation functions and their inverse functions -
，將變化函數及其逆-變化函數的性質推廣到廣義正規變化函數及其逆函數Conclusion the taihua complex in the area is a metamorphic complex undergone low - angle overthrust from the south to the north and uplifting lately by fault blocking, rather than a mcc
結論小秦嶺地區的太華雜巖解釋為經歷了從南向北的鏟狀逆沖推覆和後期抬升塊斷剝露的變質雜巖更為合理。The characteristics of damping shows that the uncompensated parallel ac transmission line can release the coupling between the hvdc and generator and improve the damping of the system, hence the possibility of subsynchronous oscillation decrease. in such a system scheme, the hvdc system dominates the changes of damping due to the small magnitude of the damping provided by ac line. when the ac transmission line is compensated with a fixed series capacitor, the situation will be totally different
其中，並列運行的無串補交流輸電線路可以緩解hvdc與其臨近機組之間的機電耦合程度，改善hvdc的電氣負阻尼特性，從浙江大學博士學位論文摘要而減輕機組發生次同步振蕩的危險性，此時系統的整體電氣阻尼特性由hvdc的性質決定;但若交流線路中存在串聯補償電容，則系統幅值較大的電氣負阻尼不僅可能使整流站機組發生次同步振蕩，逆變站附近機組同樣存在發生次同步振蕩的可能性，此時系統的整體阻尼特性由串聯補償電容的性質決定。A fault decision logic is presented, the fault state of the switch and the fault bridge of the inverter is fixed on. 6
給出了一種故障決策邏輯，基於此可有效確定開關元件故障性質及逆變器故障橋臂位置。Abstract : a continuity wave model is put forward for the dispersion processof liquid - liquid two - phase system, by coupling mass and momentum conservation equations of two - fluid model. the conditions that result in a dispersion choke and the weak instability of a dispersion process are derived from the model. the phenomena of catastrophic inversion and transitional inversion are explained. the effect of drop size distribution on the maximum volume concentration of a emulsion is predicted using the model. according to the theory herein, emulsion inversion is the regime transition of liquid - liquid system due to the instablity of a dispersion process. the effect of drop size distribution on the maximum volume concentration of a liquid - liquid emulsion only occurs in a certain range of weber numbers
文摘:以雙流體模型為基礎，通過質量守恆方程和動量守恆方程的耦合，提出了液-液兩相系中彌散傳質的連續波模型.由該模型得到彌散傳質過程阻塞和彌散傳質過程弱不穩定性產生的條件，計算了液滴尺寸及其分佈對乳化液極大堆砌分數的影響，解釋了劇變型乳化逆變和漸變型乳化逆變現象.研究結果表明，乳化逆變是由於彌散傳質過程的不穩定性而引起的懸浮體型態的改變，隨液滴尺寸多分散性的增大，極大堆砌分數增大；隨液滴平均尺寸的增大，多分散性對極大堆砌分數的影響減弱；當韋伯數足夠大時，液滴尺寸及其分佈對乳化液極大堆砌分數無影響Power supply system made up of some parallel operating inverters can meet the needs of different load magnitudes and achieve higher quality and reliability of power supply. it is propitious to the standardization and large scale manufacturing of the inverter modules. at the same time, with the growing usage of appliances powered by special suppliers, the market needs is developing enormously
由多個模塊化的逆變電源並聯運行構建的電源系統，可以滿足不同的負載功率需求以及較高的供電質量和可靠性要求，並且有利於逆變電源模塊生產的標準化、規模化；同時，隨著使用特種電源供電的裝備日趨增多，市場空間不斷增大，逆變電源並聯控制技術的研究具有廣泛的經濟前景和社會效益。Unlike inverters for general purpose, auxiliary inverters of subway vehicle have the characters of high power, wide range of high dc input voltage, entirely sealed electronic units and natural cooling. single pulse width modulation ( pwm ) technology is found to be optimal by comparing several different high power inverter technologies and is utilized in the 2 - channel staircase inverter discussed in this thesis
針對地鐵車輛輔助逆變電源的大功率、直流側輸入電壓高且變化范圍寬、輸出電壓穩定且波形質量高，電子部件全密封且要求自然冷卻的特點，分析比較了幾種大功率逆變器技術方案，選擇單邊脈寬調制階梯波合成逆變器為研究對象。An output filter between the output end of inverter and the power network is added to improve the quality of output current. the design of the filter is discussed in detail
提出了在逆變器輸出端和電網間加輸出濾波器的技術措施，並詳細討論了濾波器的設計，從而改善了輸出電流波形的質量。Recurring to resynchronization marker, data partitioning and rvlc, video files with errors are dealt with. the article codes and decodes video source files with errors, computing every algorithm ' s psnr, comparing video pictures " subjective and objective quality
運用重同步標志（ resyncmarker ） 、數據分離（ datapartitioning ）和可逆變長編碼（ rvlc ）對含錯的視頻文件分別做錯誤處理。以mpeg - 4錯誤恢復方法對糟糕視頻源文件編碼、解碼，計算該演算法的psnr ，比較視頻幀的主客觀質量。This scheme can achieve the satisfactory static and dynamic response, and can be used in occasion of high quality voltage waveform
此方案可使逆變電源輸出電壓波形兼具良好的穩態和暫態特性，可用於逆變電源輸出波形質量要求較高的場合。Experiments including resistance load experiment, inverter experiment, dynamic experiment and motor load experiment are carried out with high power supply quality rectifier
建立了一套完整的實驗系統，對高品質整流電源進行了帶電阻負載實驗、逆變實驗、動態實驗和帶電機負載實驗。Control system software is improved with three aspects such as the start of rectifier, confirmation of pi parameter and improvement of ac current, and the control strategy is consummated further. an integrated experiment system is setup
結合高品質整流電源與逆變環節的聯合控制特點，從整流電源的啟動、 pi參數的確定和電流波形的改善三個方面對控制系統軟體進行了改進，完善了整流電源的控制方法。Inverter is the core of ups and is required to have high quality output waveform
而逆變器是整個不間斷電源系統的核心，必須具有輸出高質量電壓波形的能力。Repetitive control is used to reduce voltage distortion under abrupt load variation or nonlinear loads and attain good quality of the voltage waveform ; current loop is designed to quicken the dynamic response and strengthen the ability of the inverter control
重復控制可以抑制逆變電源在負載變化嚴重（空載加到滿載）或者非線性負載條件下的輸出電壓畸變，保證輸出波形的質量；電流環用以改善輸出波形的動態響應特性，提高逆變控制的能力。In the charter five, the characters and mathematical structures of r - iago generation space are researched by the mathematical methods, the conception of mapping in grey generating space put forward, and the properties that ago and iago are not only the linear transformation, but also the power transformation
第五章通過代數方法研究卜iago生成空間的性質和代數結構，提出了生成空間中映射的概念，並從數學上證明了累加生成與累減生成既為線性逆變換，又為冪變換，並得到它們的變換矩陣。As a result, there are some disadvantages for its large size, heavy weight and lower efficiency. in this paper, phase - shifted zero - voltage - switching pwm converter is presented, which is help to ruduce the size and improve the efficiency of inverter. in the later stage, we adopted a pic microcomputer as the control chip, whose low price decreases the price of the inverter
在逆變環節中，本文採用體積小、功能全、價格便宜而且簡單易學的單片機pic16c72作為控制晶元，對前級直流電壓進行spwm正弦脈寬調制，從而產生了高質量的正弦輸出電壓波形，減小了輸出電壓中的諧波含量。4. with the consideration of practical soil - pile interaction, the soil around pile is modeled as a three - dimensional viscous - elastic continuous medium and the time effect of the settlement of single pile is studied. the semi - analytical solutions for vertical displacement of soil and for the relationship between settlement of pile head and time were obtained by laplace transform method and fourier inverse method, and the law of the settlement of pile head varying with time was then analyzed and discussed
考慮樁土藕合作用的單樁沉降時間效應研究從研究空間軸對稱問題的角度出發，將樁周土體建模為三維粘彈性連續介質，更為合理地考慮了靜荷載下樁土系統中單樁與樁周土的藕合作用，分別建立了樁周土體和樁體的靜力平衡方程，並通過拉普拉斯變換、傅立葉逆變換等數學手段，獲得了單樁樁周土體的垂直變形和樁頂沉降在拉普拉斯變換域內的解析解和在時間域內的半解析解，進而分析討論了單樁沉降隨時間變化的規律。Because of the complication of ground condition, the ground is regarded as continuous layers and each layer of soil is defined as a uniform and elastic object. by solving the wave equation ( navier equation ) of three - dimensional elastic object, the results of ground under moving loads in wave number ? frequency field are obtained, then through the rapid fourier reverse transform, the results in space - time field are obtained
由於地質條件的復雜性，將地基看成是層狀的，並且每層都是均勻彈性的，通過解三維彈性體的波動方程（ navier方程）得到地基在移動荷載作用下的波數-頻域的解，再通過快速fourier逆變換（ fft ）求得空間-時間域的解。This paper proposes a two - armed push - pull inverter, including its topologies, power distributions in every switching devices and modulation schemes. the major parameters such as thd and df of this vsi are analyzed. comparison study shows that the quality of two - armed push - pull vsi is better than those of square - wave vsi. and the switching loss is lower than that of pwm scheme at same time, especially used in wide frequency range. detailed calculating formulae and experimental results are presented
該文介紹了一種雙臂推挽式逆變器，包括其電路拓撲、每個開關器件的功率分佈和調制策略.分析了這種電壓源逆變器的主要參數，如總諧波失真度（ thd ）和失真指數（ df ） .比較研究表明，這種逆變器的質量明顯優于方波逆變器，同時開關損耗明顯低於pwm調制方式，特別適用於寬頻范圍.介紹了計算公式和實驗結果分享友人