電效之熱效應 的英文怎麼說
中文拼音 [diànxiàozhīrèxiàoyīng]
電效之熱效應
英文
heating effect of electricity-
With the development of electronic technology in the field of high - frequency and high - power, power mosfet is gradually enhancing its important status in semiconductor apparatus and is being widely applied in power converters as switch. with the increasing of the operating frequency ( > 200khz ), the energy loss caused by parasitic capacitance will affect the efficiency of power transforming in converters. especially in the applications of high frequency power supply using mosfet as main devices ( the unit of frequency is mhz ), the energy loss caused by the switch process will badly affect its efficiency
隨著電力電子技術進一步向高頻的大功率用電領域發展，功率mosfet在各種電力半導體器件中的重要地位日益顯著，使用功率mosfet作為開關器件的功率轉換電路也日益增多，但隨著器件開關頻率的提高（大於200khz ） ，由器件極間電容引起的能量損耗將會影響到功率轉換電路的能量傳輸效率，特別是在以mosfet作為開關器件的高頻感應加熱電源中（工作頻率可達兆赫） ， mosfet在開關過程中的能量損耗嚴重影響到電源的效率，因此如何減小開關器件的損耗提高高頻功率轉換線路的效率成為電力電子技術領域的重要研究課題之一。Of the currently available coolers for electronic products with a high heat flux, microchannel heat sinks have been proved to be able to provide the best heat transfer performance and are one of the most promising coolers. the manifold microchannel ( mmc ) heat sink has many advantages such as low thermal resistance, compact structure, little amount of coolant, low flow rate, uniform temperature distribution along the flow direction and many others, so it is able to provide the best heat transfer performance : lowering the maxmal temperature and the temperature difference
在目前高熱通量電子產品冷卻器中，微通道熱沉已被證實是傳熱性能最佳且最具應用潛力的冷卻方式之一，而歧管式微通道熱沉因具有低熱阻、結構緊湊、所需冷卻液量小、沿流動方向溫度分佈均勻等優點則成為減小電子元器件換熱表面最高溫度、降低溫度變化的一種有效方法。Currently, with agent - based e - commerce research becoming hotspot, soft agent technique is considered a very useful tool to develop online business, especially its characteristic of autonomy, personalization, social ability and intelligence, which can effectively meet the needs of being flexible in online trading
目前，基於agent的電子商務研究成為業界熱點，軟體agent技術被視為在線商務中極為有用的技術之一，特別是它所具有的自治性、交互性和智能性能有效地適應交易的靈活性要求。Multilevel inverter technology is a pop research in high voltage and high - power converting fields. it can synthesize multilevel output with the distribution of dc voltage and the combination of different switching actions to reduce voltage stress across the switches and bulk of the equipment, and lessen output harmonic distortion and switching loss of the inverter
多電平逆變器是當前高壓大功率電能變換領域中的研究熱點之一，它通過對直流側的分壓和開關動作的不同組合，實現多電平階梯波輸出電壓，能有效地減小器件承受的電壓應力，縮小裝置體積，減小輸出電壓諧波和開關損耗。With fast development of our country " s gas industry and air ' s increasingly serious contamination in city, using gas instead of coal and supplying energy in high efficiency and cleanliness has become necessary way in city. there are different problems in the current heating ( air conditioning ) systems. in the cogeneration system, heat and power affect each other, heating - pump heating ( aie conditioning ) system can not satisfy the peak load very well, the cost of gas fuel in boilor heating sestem is so high. the high generating efficiency of the diesel - engine two - sourse heating ( air conditioning ) systems is limited in range of 100kw - 1000kw, the heating scope is so limited. combined cycle of two sourse heating ( air conditioning ) system is most suitable selection to buesness community with big scope my paper aim at this syetem ' s primary question when it is applied in our country - - - - bringing project into execution and technology economy feasibility and off - design performence, combined with a certain demonstrating project in beijing buesness community, going along with calculating and analyzing, drawing out some efficient datas and conclusions, based on this, bringing out primary alements affecting combined cycle of two sourse heating ( air conditioning ) system " economics
熱電聯產系統熱電相互牽連，熱泵供暖（空調）系統不容易很好地滿足尖峰負荷，鍋爐供暖系統供熱中天然氣燃料構成的成本過高，內燃機雙源供暖（空調）系統的高發電效率僅限於100kw - 1000kw負荷范圍，供熱面積有限。對于大面積的商業園區、居民小區，燃燒天然氣的燃氣-蒸汽聯合循環雙源供暖（空調）系統是最佳選擇之一。本論文針對該系統在我國應用時的主要問題- - -方案的技術實施與技術經濟可行性，結合北京某一商業園區示範工程，進行了系統的計算與分析，得到了有效的數據與結論，在此基礎上，提出影響聯合循環雙源供暖（空調）系統經濟性的主要因素，並進行敏感性分析，得出有益的結論；最後通過各種供暖方案的比較分析回答了某些人對該系統的疑慮和不解，並指出系統的優化方向。Abstract : the responses of shaft bow and their relationships with unbalanceresponses and mechanical or electronic run out are analyzed based on the theory of rotor dynamics. the responses of shaft bow are separated from the unbalance responses successfully by making use of vibration information under different rotor runs. an identification method of thermal bend is presented based on the 2d - holospectrum technique. experimental results show that when bow phase is steady and amplitude is variable, the tangent of initial phase point on the 2d - holospectrum is parallel, which can be effectively used for diagnosis of bent shaft
文摘:依據轉子動力學理論分析了柔性轉子彎曲響應的特徵，在此基礎上討論了它與不平衡響應及機械與電氣跳動量之間的關系，並利用轉子在不同起車情況下的振動信息，有效地分離了彎曲響應和不平衡響應，求解出彎曲量與不平衡量的比值.提出了轉子在恆定轉速下，基於二維全息譜技術的熱彎曲故障識別方法.研究結果表明，當彎曲量相位穩定而其幅值變化時，轉子響應的二維全息譜初相點的切線是相互平行的，由此可以有效地實現轉子熱彎曲故障的識別與診斷The heat resulting from the resistance of the metals locally liquefies the conductor and the plug, creating a single material alloy where the two meet
其因金屬電阻效應所產生之熱度，可局部液化導體與插頭之金屬，從而在其會合交接處，熔合而成單一合金材質。Heat and electricity cogeneration and concentrated heat supply can realize the project of has the synthetic of saving energy, environmental protection improving the quality of heating and increasing electricity servicing
熱電聯產集中供熱項目具有節約能源、改善環境、提高供熱質量、增加電力供應等綜合效益，是城市治理大氣污染和提高能源綜合利用的重要手段之一。Pristine materials evidently ca n ' t meet such requirements. it has been demonstrated that preparations of hybrid and nanoscale materials are effective ways to improve material properties, the field of which are becoming one of hot research in organic photoconductive materials at present. new phenomena and new effects can also be derived from these hybrid and nanoscale organic photoconductive materials, which can help to illuminate photocarrier generation mechanism of organic photoconductive materials
大量研究結果表明，復合化和低維化是提高材料基本性能的有效途徑，因此通過有機光電導材料復合化與低維化的研究，以滿足上述要求，就成為當前國際上有機光電材料科學研究的前沿與熱點之一，同時有機光電導材料的復合化和低維化的研究必將有助於發現許多新現象和新效應，有助於闡明有機材料的光電導機理，建立完善的有機光電導理論，為高性能有機光電導材料的設計提供理論基礎。Organic electroluminescent ( oel ) devices are one of hot research project because of great interests in both science and applications among photoelectronic field. people invent a series of luminescent materials and devices, but the emission from exciplex is usually found in oel devices
有機電致發光（ oel ）近年來因在科學研究和實際應用領域的巨大效益而成為國際上研究的熱點之一，人們為此開發了各種各樣的發光材料和器件。The observatory maintains a website on the internet. apart from a variety of forecasts, the website provides a wide spectrum of information such as satellite pictures, weather maps, weather of other cities, tv weather programmes, tropical cyclone warnings for shipping, rainfall distribution maps, tropical cyclone tracks, newsletters for the friends of the observatory, information on el nino and the greenhouse effect, and near real - time weather information over various places in hong kong
天文臺在網際網路上設有網站，市民可透過該網站閱覽各類天氣預報、衛星雲圖、天氣圖、各大城市的天氣資料、電視天氣節目、供船舶用的熱帶氣旋警告、雨量分布圖、熱帶氣旋路徑圖、天文臺之友會員通訊、厄爾尼諾及溫室效應資料和香港各區接近實時的天氣資料。The electroelastic interaction of dislocation, inhomogeneity and interior defects is a greatly significative subject in the fields of solid mechanics and materials science
復合材料中位錯與夾雜及內部缺陷之間的電彈干涉效應問題，是當前固體力學與材料科學研究領域的前沿熱點課題。分享友人