熱分散系數 的英文怎麼說

中文拼音 [fēnsǎnshǔ]
熱分散系數 英文
thermal dispersivity
  • : 分Ⅰ名詞1. (成分) component 2. (職責和權利的限度) what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] (料想) judge
  • : 散動詞1. (由聚集而分離) break up; disperse 2. (散布) distribute; disseminate; give out 3. (排除) dispel; let out
  • : 系動詞(打結; 扣) tie; fasten; do up; button up
  • : 數副詞(屢次) frequently; repeatedly
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. Firstly, the surface characteristic of polystyrene particle is changed from water detesting to water intimity by using special techniques and admixtures so mat the compound quality with inorganic materials is insured. secondly, the contradiction between the weight and strength is solved through optimizing the particle size and using composite fiber and the best heat conductivity is achieved under the condition that the necessary strength is met. in the research process, the author solved the problem of fiber dispersing in insulating materials so that the contraction of the material is controlled

    課題研究中,首先採用特殊的改性工藝及外加劑實現對聚苯乙烯顆粒表面的成功改性,使其表面由憎水轉化為完全親水,確保與無機材料的復合質量;其次,通過採用優化骨料級配及使用復合纖維等措施解決了保溫材料的輕質與強度的矛盾,使保溫材料在滿足必要的強度的前提下,導降至最小;並且,課題研究中成功解決了纖維在保溫材料中均勻的問題,達到了抑制保溫材料收縮的目的;最後,通過採用復合外加劑、合適的膠凝材料及合理的配比等措施確保該保溫材料具有良好的和易性,滿足施工的要求。
  2. Thirdly, the paper discusses the driver of the peripheral equipment, how to port the uc / os - n and uclinux, h. 323 protocol and the application of the system in the digital speech classroom. also some software and hardware measure are adopted to enhance the system stability. at last, the shortcoming and the something to be improved are given. dsp can be used to realize real - time speech coding algorithm, and after porting ( ac / os - n, arm can manage the keyboard, the lcd and the ethernet peripheral etc. then the embedded network system with specific purpose can be used in others fields, such as pda, set of top, web tv, ect

    在實際設計實現中,為提高統軟、硬體整體穩定性和可靠性,使用了以下幾種方法: ( 1 )低電壓復位、抗電源抖動能力、增加時鐘監測電路、抗電磁干擾能力、等技術; ( 2 )多層pcb設計,線路板結構緊湊,電源部採用字5v 、 3 . 3v 、 3v 、 1 . 8v和模擬5v多電源供電; ( 3 )選用表面貼和bga封裝的器件; ( 4 )按照軟體工程的要求進行析,規劃統框圖、流程析、模塊劃,減小了不同模塊的相關性,從而最大限度避免了錯誤的發生。
  3. The third model was designed to investigate atom diffusion at contacting point. fe was sintered at 500, 550 > 600, 650 > 700 under bpec and radiation heating. the test results of image processing indicated that the average pore size took on wavelike with temperature under bpec heating

    脈沖大電流加條件下,其它條件相同時,別在800 、 900的溫度武漢理土大學碩士學位論文下擴連接cu絲和ni絲,結果表明接觸線處cu和ni的擴隨溫度的升高而增大。
  4. The voltage of lithium - intercalation reaction, impedance and structural stability of intercalation - type cathode material were analysed and calculated. theoritical results show that the reaction voltage depends on the content of lithium and the bond energy, and that the key ways to lower the electrode impedance are to increase the electronic conductivity of the electrode and the diffusion coefficient of lithium ion in the host and to decrease the size of powder. in addition, the thermal stability of lithium - insertion structure can be improved by using crystallographic co - lattice theory and doping treatment

    本文從嵌入式陰極材料的嵌鋰反應的電壓、阻抗及結構穩定性的析和理論計算著手,得到了電壓取決于基體中各種離子間的鍵能及鋰含量、降低電極阻抗的關鍵是提高電子型導電性和li ~ +在基體中的擴及減小粉末粒度的理論依據及其利用晶體的共格原理和摻雜改性的方式來提高材料嵌鋰結構的穩定性的設計思路。
  5. The membrane properties were found to be dependent upon the content of styrene. the membrane physic - chemical properties compare to nafion 117 except that their chemical stability has to be further improved to make them acceptable for practical use in the proton exchange membrane fuel cell. the proton transport through the membrane follows the " liquid - like " proton conductivity mechanism y and the water balance is important for the working condition of the fuel cell

    對磺化膜的研究析表明:膜的性能參如離子交換容量、吸水率、水合、形體穩定性、導電性能、化學與穩定性等依賴于膜中苯乙烯含量,且接枝苯乙烯相互間的位阻效應對膜性能影響很大;膜的性能可與nafion膜相比較;質子在膜中的傳導遵循「似液體」質子傳導機理;電滲析與擴作用使膜保持水平衡。
  6. At the initial stage of planar technique, b was employed as ideal diffusion impurity in base - region of npn si planar devices because of the match of its solid - solubility and diffusion coefficient in si with those of p in emission - region, and the good shield effect of sio2 film to b. but because of the relatively large solubility ( 5 1020 / cm3 at 1000 ) and the small diffusion coefficient, the linear slowly - changed distribution of acceptor b in pn junction can not be formed, which could not cater to the requirement of high - reversal - voltage devics. thereafter b - a1 paste - layer diffusion technology and close - tube ga - diffusion technology had been developed, while the former can lead to relatively large the base - region deviation and abruptly varied region in si, which caused severe decentralization of current amplification parameter, bad thermal stability and high tr ; the latter needed the relatively difficult pack technique, with poor repeatability, high rejection ratio, and poor diffusion quality and productio n efficiency

    在平面工藝初期,由於b在硅中的固溶度、擴與n型發射區的磷相匹配, sio _ 2對其又有良好的掩蔽作用,早被選為npn硅平面器件的理想基區擴源,但b在硅中的固溶度大( 1000時達到5 10 ~ ( 20 ) ,擴小, b在硅中的雜質佈不易形成pn結中雜質的線性緩變佈,導致器件不能滿足高反壓的要求,隨之又出現了硼鋁塗層擴工藝和閉管擴鎵工藝,前者會引起較大的基區偏差,雜質在硅內存在突變區域,導致放大嚴重,下降時間t _ f值較高,穩定性差;後者需要難度較大的真空封管技術,工藝重復性差,報廢率高,在擴質量、生產效率諸方面均不能令人滿意。
  7. The relations between the parameters of gas charging and exhausting, heat quantity through the shell of tube ( q ), the length of the tube ( l ), the ratio of gas charging time to gas exhausting time ( ), the frequency of the jet flow ( f ), the ratio of the expansion ( ), the nature of thermal separator and the unsteady flow in the tube were established

    建立了進、排氣參、管壁量( q ) 、管長( l ) 、充、排氣時間比( ) 、射流頻率( f ) 、膨脹比( )等參離機性能及管內非定常流動的關,並析了有關因素對離機性能的影響。
  8. Via the analysis of heat balance computation model and the computation of online heat balance for industrial coal boiler, this dissertation researched overall input heat, efficient utilized quantity of heat, heat losing of discharge flue gas, heat losing of chemistry and mechanism incomplete combustion, heat losing of dispelling heat of boiler, heat efficiency, air superfluous coefficient, wind speed, wind quantity, computation of primary air circle cutting and whose influence on boiler combustion efficiency

    本文通過對工業煤粉鍋爐平衡計算模型的析,利用在線平衡計算,研究了總輸入、有效利用量、排煙損失、化學不完全燃燒損失、機械不完全燃燒損失、鍋爐損失、效率、空氣過剩、風速、風量及一次風切圓計算以及這些因素對鍋爐燃燒效率的影響。
  9. The contents of this paper include the following several aspects : ( 1 ) a model of the fractures leakage is built through counting and analyzing the wealthy geological records of hae field, and a model of the fracture water transporting is also built according to the fracture water condition of its recharge and its runoff and its discharge in hae field ; ( 2 ) this paper studies the chemical behavior and the migration parameters of the elenent sr2 + in ground water in hae field, the main contents include : the presence form of the element sr in ground water is analyzed by way of the rmodynamics ; the absorption mechanism that granite and sand stone absorbs sr element is analyzed based on theory and experiment test the diffusion parameters of the element sr in water and in granite and in sand stone are researched with laboratory experiment test ; the partition coefficient of sand stone and granite to sr is tested by the batch way

    其研究內容包括以下幾個方面: ( 1 )通過對我國hae預選處置場豐富地質資料的大量統計和析,建立了該處置場的基巖裂隙滲透模型。再根據hae預選處置場基巖裂隙水的補給、徑流、排泄條件及水位動態特徵,建立了預選處置場基巖裂隙水水運動模型。 ( 2 )對高毒性鍶元素在我國hae預選處置場地下水中的化學行為和遷移參進行統的研究,其中主要包括運用力學方法析了鍶元素在地下水中的存在形態,利用理論析與實驗測試相結合的方法析了花崗巖和砂巖對核素鍶的吸附機制,採用室內實驗裝置研究了核素鍶在地下水中的擴以及在花崗巖和砂巖中的本徵擴,採用靜態批式法研究了鍶在砂巖和花崗巖中的
  10. On the basis of the analysis of fundamental principle of thermoelectric refrigeration, the steady state mathematical model of the thermoelectric system was founded. according to the model, the theoretical analysis and calculation are made on various working conditions, and analyzed theoretically the effects on thermoelectric system which caused by hot and cold temperature difference, the device ’ s effective system figure of merit, the properties of the heat changers, which established theoretical basic for the opening up and design of the thermoelectric system and its performance test

    電製冷基本原理的基礎上,建立了電裝置的穩態學模型,並依據該模型對電裝置統進行了不同的工作狀態下的析計算,並就電裝置的冷端溫差、電堆片的優值器的性能與泵裝置性能的影響進行了理論析,為電裝置的開發設計和現有電裝置的性能測試建立計算理論基礎。
  11. Based on the observation data such as coads and soda, the main climatological features of the tropical indian ocean and relationships of sea surface temperature ( sst ), heat budget with ocean dynamics and thermodynamics processes are analyzed ; the seasonal and interannual variability of the tropical indian ocean are well simulated using a ocean general circulation model ; based on the thermal equation and model output data, the variation mechanism of sst and heat budget are investigated in the tropical indian ocean ; besides, the effect of seasonal variation of wind stress, ekman pumping and horizontal diffusivity on the ocean current and heat budget are studied, using both ideal model and complex model

    本文根據coads 、 soda等實際觀測資料,較全面的析了帶印度洋主要的氣候特點,並研究了海表面溫度( sst ) 、收支與海洋動力、力過程的聯;利用全球海洋環流模式較好地模擬出帶印度洋的季節和年際變化;基於力學方程和海洋環流模式輸出結果,探討了帶印度洋sst和北印度洋量收支的季節和年際變化機制,進一步揭示了海洋動力過程在北印度洋平衡中的重要作用;在此基礎上,利用理想化的值試驗與值模擬結果相結合的方式,證實了風應力的季節變化和ekman抽吸,以及水平量擴對北印度洋海洋環流和收支的影響。
  12. Based on the analysis of gas - solid multiphase catalytic reaction, the chemical reaction model is established. when the reaction is controlled by the chemical dynamic, the reaction rate is introduced by consideration of the adsorption and desorption effects. when the reaction is controlled by mass transfer, the diffusion coefficient is established which can present the flow rate increases in small reynolds domain ; for the internal diffusion, the internal diffusion coefficient is derived, and then the internal diffusion is coupled with chemical reaction to represent the phenomenon that the diffusion and the chemical reaction occur cocurrently

    本文在考慮催化轉化器載體內發生的傳傳質現象的基礎上,建立了催化轉化器的一維單孔道和三維多孔道傳傳質模型;在析載體內以氣-固多相催化反應為特點的工作機理的基礎上,建立了催化轉化器的化學反應模型:當催化轉化處于化學動力學控制區時,引入了考慮吸附、表面反應和脫附的表面化學反應速率公式,當催化轉化處于質量輸運控制區時,引入了決定外擴能力的擴公式和和決定內擴速率的內擴公式,並與化學反應速率相耦合,得出由擴過程決定的化學反應速率公式。
  13. In this paper we establish math modal of transient temperature and stress fields of the turbine " rotor with finite element method, develop rotor ' s thermal status online monitor system by distribute computer and visual software, realize online show and analyst of temperature and stress fields when all kinds of transient condition, and finally provide reasonable and optimized operation suggestions, improve safety and economic level of unit sets " operation

    本文採用有限元建立汽輪機轉子的暫態溫度場、應力場的學模型,藉助計算機式計算、可視化等技術開發轉子的狀態在線監測統,實現汽輪機在各種過渡工況下轉子溫度場、應力場的在線顯示與析,提供合理的操作建議,提高機組運行的安全性與經濟性。
  14. We give ptr ' s amplitude and phase signal of one dimension based on the theory of ptr, discuss the ptr ' s signal ' s frequency characteristic, and a method for measuring thermal diffusivity of opaque materials is introduced. then, we study on anisotropic materials " thermal conductivity, the temperature field and thermal conductivity tensor of anisotropic materials is theoretically deduced from the theory of ptr, and is proved by the experiment

    從光輻射理論出發,推導出一維情況下ptr信號的振幅和位相表達式,討論了光信號的頻率特性,介紹了一種用ptr技術測量不透明材料的優化方法;接著研究析了各向異性介質受調制激光束輻照下產生的光信號,在理論上推導出各向異性介質的溫度場以及導率張量並給予一定的實驗驗證。
  15. The samples were welded at 750, 800, 850 and 900. the diffusion coefficients ( d ) of cu and ni at interface increased with the increase of welding temperature. and comparing with radiation heating, atom diffusion velocity at interface quickened

    其它條件相同時,別在750 、 800 、 850 、 900的溫度下採用脈沖大電流加連接cu和ni片狀材料,結果表明接觸面處cu和ni的擴隨溫度升高而增大。
  16. Firstly, for jet array impingement cooling, the effects of the distance of adjacent holes, the impinging distance and jet reynolds number on heat transfer characteristic at the target wall are summarized under staggered holes arrangement and the same hole diameter. and then, the numerical simulation of inclined multi - hole film cooling has been studied. the influence factors examined in this case include blowing ratio and the distance of adjacent holes

    首先通過對射流沖擊冷卻方式的研究,析了相鄰孔間距、沖擊間距以及射流入口雷諾對沖擊靶面換的影響情況,然後對多斜孔冷卻方式進行了值模擬,重點探討了吹風比和相鄰孔間距對絕溫比與壁面換的影響規律,最後,針對沖擊-發復合冷卻流場的計算物理模型,研究吹風比、相鄰孔間距的變化對沖擊-發復合冷卻流動與傳特性的影響。
  17. Focusing on the problem of sound field of scattering due to the existence of tubes, the general mathematical model modeled according the condition of plant, and then the coefficient of sound scattering is resolved by using the method of inverse matrix, the functions of arbitrary configuration of tubes is got, the far field scattered pressure and near field scattered intensity of the unit of heat exchanger tubes is calculated, at last, the effect of soot cleaning due to the existence is analyzed

    論文根據爐內管束的實際情況,建立換器管束聲波射的通用學模型,利用迭加原理法求解模型中的待定射作用,得出任意布置管束的射聲場特性,並具體計算鍋爐換器管束單元聲波射遠場聲壓佈和近場壁面的聲強佈,最後析由於聲波的多重射作用而對聲波吹灰的影響。
  18. In this paper a perfect and flexible experimental system of low nox combustion is established firstly. the influences of the temperature of combustion, the air excess coefficient, a certain amount of vapor added in advance, the temperature of preheated air, adding microwave into gas before combustion, gas recycling combustion and the mode of combustion ( diffused and premixed ) on nox emission are analyzed respectively. the combustion of liquid petroleum gas is simulated with phoenics 3. 5

    首先建立了完善靈活的低no _ x燃燒實驗統,在實驗統上完成了燃燒溫度、過量空氣、預先加入一定量的水蒸汽、空氣預溫度、對燃氣預先進行微波處理、煙氣再循環燃燒以及燃燒方式(擴式與預混式)對no _ x生成的影響析;採用phoenics3 . 5軟體進行了液化石油氣燃燒的值模擬。
  19. It was found that the interfacial bonding of 93w - ofc was both the joining action of ofc / w grains and that of ofc / ni - fe binders, whereas the joining of ofc to tc4 could be seen as the mutual intense diffusion effect between ofc / tc4 and as a result cu - ti intermetallic compounds were formed at the joint. the joining of tc4 - a1 and a1 - mb2 were also attributed to the result of diffusion between elements ti - al and al - mg respectively. on the other hand, residual thermal stress and stress - induced distortion were produced at the joint simultaneously due to the difference in thermal expansion coefficient of different welding " materials

    研究表明, 93w與ofc的界面連接是ofc與93w中w晶粒的連接以及ofc與93w中ni - fe粘接劑的連接共同作用的結果; ofc與tc _ 4連接界面的形成是由於ofc與tc _ 4之間發生反應擴,並由此在二者接頭處生成了cu - ti金屬間化合物的中間相; tc _ 4 - al的連接與al - mb _ 2的連接則別是其基體元素ti 、 al之間和al 、 mg之間元素互擴的結果,另外,由於膨脹的差異,擴焊接后在不同焊件的接頭處存在殘余應力並由此引起接頭的形變。
  20. The profile of arbitrary shaped groove is approximated by a series of rectangular steps and the " hot " dispersion equation of the coaxial arbitrary - shaped - groove slow - wave structure is derived by the self - consistent theory

    摘要用階梯近似的方法析任意槽形加載的圓波導慢波統中的場,採用自洽場理論,得到了任意槽形周期加載圓波導慢波統在小信號條件下的「」色方程,並對結構參對小信號增益的影響情況進行了研究。
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