致冷系數 的英文怎麼說
中文拼音 [zhìlěngxìshǔ]
致冷系數
英文
kühlungskoeffizient-
Based on developed experimental testing facility, the shading performances of southing horizontal shading devices, vertical shading devices and integrative shading devices of external windows are measured, the performance parameters including indoor temperature, air - conditioned cooling load and shading coefficient as so on. and the shading coefficient of experimental test results and calculation results based on design standard for building energy efficiency are compared, and the windows5. 2 simulation results are compared also. the measured results are consistent with the calculation results of horizontal shading devices and vertical shading devices
本文利用研製的建築遮陽性能檢測裝置，對南向水平遮陽板、垂直遮陽板和綜合遮陽板外窗的遮陽性能（包括室內溫度、空調耗冷量和遮陽系數等）進行了實驗測試，並對遮陽系數的實驗測試結果與節能設計標準的計算值以及windows5 . 2軟體的模擬結果進行了比較分析，測試結果表明水平遮陽板和垂直遮陽板外窗的遮陽系數與計算結果比較一致，相對誤差分別為2 . 5 %和4 % ，而綜合遮陽板外窗的遮陽系數與計算結果的差值比較大，相對誤差達到10 %以上。Calculation results fit experimental data well. at last, in order to further discover the matching between the two systems of small - scale cold storage, phoenics - cfd general software is applied in the study on 3 - d distributions of the airflow and temperature fields in the chamber of the small - scale cold storage. buoyancy model in the simulation are considered and the results are in agreement with the experimental data
最後，為了進一步了解小型冷庫兩個組成系統間的匹配特性，用phoenics數值計算專用軟體對冷庫內三維流場和溫度場分佈特性作了計算，並在計算中考慮浮升力的影響，計算結果與特徵點的實驗結果基本一致。Results show that the brittle fracture is mainly caused by hydrogen brittleness that results from the oxidation arid absorbing hydrogen of copper tube during braze welding
同時在加熱和冷卻時，由於異種材料的熱脹系數差別過大，產生的較大熱應力作用於已存在的裂紋，促使裂紋二次擴展，甚至使得晶粒脫落產生空洞，最終導致焊接接頭漏氣失效。Other reasons given for the worsening situation are the lack of community in the country, with people feeling less connected to their local neighbourhoods, the rising cost of bringing up children, and the increase in single - parent families
報告也提出了其他導致兒童生存條件惡化的原因，包括民眾普遍缺乏社區意識，人們與鄰居關系日益冷淡，養兒育女的花費增加，以及單親家庭數量上升。Based on t213 and other observational datasets, a severe heavy rain occurred in changjiang - huaihe basins during 4 - 5 july 2003 is studied. the primary diagnostic analyses show that double or single block is the characteristics of the macroscale circulation in this rainfall process. the strong conflict of warm and cold mass, mesoscale convergence on meiyu front, shear line, and stably maintaining of high and low jets make for the rainfall
本文採用地面高空常規資料，每6h一次的降水資料，以及t213數值預報資料，對2003年7月4 - 5日發生在江淮地區的一次梅雨鋒暴雨過程的影響系統及其可能機制進行了初步的診斷分析，發現，高緯雙阻、單阻形勢是這次暴雨過程發生的大尺度環流特徵；冷暖空氣的激烈交鋒、梅雨鋒上的中尺度輻合線、 700hpa 、 850hpa上的低渦、切變線以及穩定維持的高低空急流是導致這場暴雨的直接影響系統；該地區維持一個高能、飽和、潛在不穩定的環境，有利於特大暴雨的產生和維持。Examinations of steady status and analysis of dynamic experiments have been conducted on band - tube evaporator and parallel - flow condenser using r134a refrigerant. the steady examination show that the model error was under the allowable error, the inlet mass and enthalpy disturb experiments indicate that the subsection model, be good at reflecting the change of parameters of the heat exchanger, accord with the basic principle of thermodynamics theory and the actual work status. hence, the subsection simulation model research has important benefits both on theory and engineering application
在進行模擬試驗時，以使用r134a作製冷劑的管帶式蒸發器和平行流式冷凝器為對象，完成了穩態模擬計算、試驗和動態模擬分析，穩態計算結果和試驗數據對比表明，其誤差在允許范圍內；進口質量和焓值的擾動試驗結果表明：本文所建的區段式換熱器模擬模型，能很好的反映換熱器性能參數的動態變化，與系統熱動力學理論和冷凝器、蒸發器的實際工作過程基本一致。Aim : to analyze the mechanism, thermadynamic theoretical basis, dynamic mechanism and influencing factors of thermally induced phase separation ( tips ) in order to completely grasp the factors affecting the size, distribution and form of pores, so that the adjusted range of pore can be widened and the preparation of porous membrane can be repeated and controlled. methods : considering from the structural characteristics of tissue engineered materials, the methods of preparing porous membrane using tips technique, the hermadynamic theoretical basis, dynamic mechanism and influencing factors were analyzed, the problems and investigative directions in the future were also analyzed. tips technique is a process of phase separation of polymer homogenous solution under quenching, and it is suitable for diameter and structural form of the micropore materials prepared using tips are closely correlated with the kind and dispensing proportion of polymer attrnuant, polymer concentration and polymer molecular mass, etc. conducted, including determination of polymer - solvent system phase diagram, study of form and appearance of porous membrane of different thickness, study of form and appearance of porous membrane prepared with systems of different x, which is the parameter of polymer - solvent interaction
目的:分析熱致相分離成膜過程的機理、熱力學理論基礎、動力學機制以及影響因素，以便充分掌握影響孔度大小、分佈、形態的因素，使孔度調控范圍得以拓寬，使多孔膜的制備能重復可控.方法:從組織工程材料結構特點出發，分析熱致相分離聚合物多孔膜的制備方法及該法成膜的熱力學理論基礎、動力學機制以及影響因素.並分析實驗中存在的問題及今後的研究方向.結果:以熱致相分離法可制備聚合物多孔膜.熱致相分離法制備多孔膜是高聚物均相溶液在淬冷條件下發生相分離的過程，它適用於上臨界共溶溫度型聚合物一稀釋劑二元體系.熱致相分離法成膜的過程，可以認為是旋節線機理佔主導地位.熱致相分離法制備的微孔材料，其孔隙率、孔徑大小、結構形態與聚合物稀釋劑的種類、組成配比、聚合物濃度、聚合物分子量等因素密切相關.結論:可採用熱致相分離技術制備多孔膜，通過改變不同的成膜條件可獲得一系列不同孔徑尺寸和孔徑分佈的多孔膜材料.對熱致相分離成膜過程中聚合物-溶劑體系的相圖測定，不同厚度的多孔膜形貌研究，不同x （聚合物-溶劑相互作用參數）體系所制備的多孔膜形貌等需深人研究China is one of the countries which are harmed by storm surge both tropical and temperate cyclones, the disaster of storm surge can occure every seasons and from south to north in china ' s coastal area. based on the analysis of the features of temporal and spatial changes of storm surge disaster in the recent 50 years, this paper focuses on the frequency changes of historical records in recent 500 years and measured data in recent 50 years of storm surge disaster and the relationships between storm frequency change and climate fluctuation. meanwhlie, the effects of future increase in the frequency of tropical cyclones landing or affecting china and relative sea level rise with global warming on storm surge disaster of china ' s coastal area also discussed. the results show that, in recent 500 years, there are direct relationships between storm frequency change and climate fluctuation, i. e., high global mean temperature correspond with high storm frequency and low mean temperature correspond with low storm frequency. storm surge disaster in china ' s coastal area will be exacerbated with global warming
中國是全球少數幾個同時受臺風風暴潮和溫帶風暴潮危害的國家之一，風暴潮災一年四季，從南到北均可發生.本文基於中國沿海近50年風暴潮災時間變化和空間分佈特點的分析，著重探討了近500年全國及長江、黃河、珠江三角洲的歷史記錄和近50年實測風暴潮災發生頻次的變化及其與氣候波動的關系，並對未來全球變化背景下，中國沿海風暴潮災的變化趨向進行了討論.結果表明:近500年來，中國沿海的風暴潮災在氣溫較高的偏暖時段比氣溫較低的偏冷時段明顯增多.近50年實測臺風暴潮災的變化也是如此，而溫帶風暴湖的變化則與此相反.未來全球變化引起的登陸影響中國的熱帶氣旋頻次增加和相對海平面的上升，均將導致風暴潮災呈加重的趨向Based on the principles of temperature measurement using infrared thermography and the theory of thermal imaging, a uncooled ir fpa thermometry system is designed. in this system, the mathematic model of infrared thermometry calculation is established, and appropriate formulas for error analysis and calculation are obtained. the algorithm calculating the apparent emissivity of target surface is also put forward
本系統建立了非致冷紅外焦平面熱成像系統測溫計算的數學模型；對計算中可能產生的各種誤差進行了分析和計算；對系統成像的非均勻性進行了分析和校正；提出了精確測量發射率的新演算法；結合熱成像的原理對紅外熱圖像的特徵進行了分析，對紅外熱像進行了新型直方圖均衡和偽彩色增強等處理。In this paper, the principle of the scientific ccd digital camera system and its key techniques in software and hardware design are systematically introduced. this paper has researched a cooled scientific grade ccd digital camera with controllable integration time, readout speed and real time data acquisition
本文系統性的介紹了ccd相機系統軟硬體設計的關鍵技術，以th7883面陣ccd傳感器為核心器件，研製了帶有致冷功能、曝光時間和讀出速率可控、實時採集的科學級ccd數碼相機。Since frosting is inevitable so long as some physical factors are satisfied, it will enlarge the resistance of airflow, cut down the airflow rate of air cooler and reduce the coefficient of heat transfer. in order to keep the refrigeration system run smoothly, frost must be removed
結霜只要滿足一定的物理條件就是不可避免的，霜層增厚增加了空氣的流動阻力，冷風機盤管流量減少，同時霜層增厚也會導致傳熱系數下降，因此為保持系統高效運行，除霜是必須的。The vertical diffusivity coefficients kv in january, april, july, october, 1997 are studied respectively. the result is same as the fact that the vertical diffusivity coefficient is large near the coastline and the vertical diffusivity coefficient is small in the interior. the vertical diffusivity coefficient assimilated in january is larger and the possible reason is that the vertical mixing of the south china sea is stronger in winter and there is a cool eddy in winter in the south china sea
我們分別做了1997年1 、 4 、 7 、 10月份的k _ v ，結果與垂直混合系數在岸邊附近較大，在海洋內部較小這一事實相一致， 1月份同化的垂直混合系數值偏大分析原因是冬季南中國海垂直混合較強，可能也與在南中國海內部冬季有一個冷渦有關系。The complete air - cooled control system has been realized by at89c52 microprocessor and icl7109 the integral adc which has high counter - interference capability. the main circuit uses non - contract solid module and has the characteristics of high speed switching off and avoiding contract burned to stop blower fan
該系統採用at89c52微處理器及抗干擾能力強的積分型模數轉換器件icl7109實現數據的採集及處理，實現了完整的風冷控制系統功能；主迴路採用無觸點固體模塊，具有關斷速度快、避免觸點燒壞、導致風機停運的特點。分享友人