無維穩定性 的英文怎麼說

中文拼音 [wúwéiwěndìngxìng]
無維穩定性 英文
non dimensional stability
  • 無 : 無Ⅰ動詞（沒有） not have; there is not; be without Ⅱ名詞1 （沒有） nothing; nil 2 （姓氏） a surn...
  • 維 : Ⅰ動詞1 （連接） tie up; hold together; link 2 （保持; 保全） maintain; safeguard; preserve; keep ...
  • 穩 : 形容詞1 （穩定; 穩當） steady; stable; firm 2 （穩重） steady; staid; sedate 3 （穩妥） sure; rel...
  • 定 : Ⅰ形容詞1 （平靜; 穩定） calm; stable 2 （已經確定的; 不改變的） fixed; settled; established Ⅱ動詞...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 穩定性 : antiwhip
  • 穩定 : 1 （使穩定） stabilize; steady 2 （穩固安定） stable; steady 3 （物質的性能不易改變的作用） stabi...
  1. In the light of the recent work in biological models, especially in the chemostat models, the dissertation provides a systematic study on the asymptotical behaviour of some chemostat models built by delay or diffusion differential equations. the main contents and results in this dissertation are as follows : i ) the global asymptotic behavior of the chemostat model with the beddington - deangelies functional responses and time delays is studied. the conditions for the uniform persistence of the competing populations are obtained via uniform persistence of infinite dimensional systems

    本論文基於當前生物學模型，特別是恆化器模型的研究現狀，深入系統的研究了時滯和擴散方程描述的幾類恆化器系統的漸近性態，本文的主要內容包括以下幾個方面：一、研究了具有beddington - deangelies功能性反應函數的時滯恆化器模型，利用無窮維連續動力系統的一致持續生存的理論給出了兩競爭種群一致持續生存的充分條件，利用單調動力學系統得到了系統的全局漸近穩定性。
  2. The recombinants were constructed by transforming ppic9 a - xynb into p. pastoris gs115. the assay results revealed that the xylanase gene xynb was overexpressed and secreted effectually in p. pastoris. in 3l fermentor the expression level of xylanase xynba exceeded 1200iu / ml and the expressed xylanase had normal bioactivity. the molecule weight of xynba was determined as about 31kd which is higher than 23kd of original enzyme xynb from streptomyces olivaceoviridis a1. xynbb was gotten by deglycasylation of xynba, whose molecule weight returned to 23kd. we comparised the enzymatic properties of xynba expressed in p. pastoris, xynbb deglycasylated from xynba and xynb produced from streptomyces olivaceoviridis al : there was little difference among the three enzymes on optimal ph, the optimal ph of xynb and xynba were both 5. 2, the optimal ph of xynbb was 5. 0 ; the optimal temperature of xynb and xynba were both 60 c, while the optimal temperature of xynbb was 50 ? ; because of glycosylation the thermal stability of xynba was better than xynb and xynbb ; the specific activity of xynba and xynbb were 883. 88iu / mg and 832. 5hu / mg respectively, which were both lower than 2814. 45iu / mg of xynb ; the km values of xynb and xynba were similar to each other which were 21. 56 ( g / kg ) and 20. 87 ( g / kg ), while the km value of xynbb was 27. 10 ( g / kg ) ; the fmax of xynba and xynbb were 4568umol / mg. min and 5329umol / mg. min respectively which were lower than 27623 umol / mg. min of xynb ; additionally all of the three enzymes did not display cellulase activity. they all had well resistance to pepsion and trypsin, and were not sensitive to metal iron, surface active agent and chelating agent. the analysis of different xylans enzymatic hydrolysate revealed : by xynba, that the main constitutions of enzymatic hydrolysate of birch wood xylans were xylotriose and xyloquaiose, which account for 68. 43 % and 16. 50 % respectively, additionally there was 11. 79 % of xylobiose ; the main constitutions of enzymatic hydrolysate of corncobs xylans were xylobiose and xylotriose, which account for 81. 78 % and 11. 55 %. the result indicated that this xylanase was a kind of 1, 4 - b - d - xylanohydrolase and was fit to used in industrial procession of xylooligosacc harides

    進一步對xynba進行了脫糖基化處理得到xynbb ，其分子量恢復到23kd ，證明xynba是糖基化蛋白。通過對畢赤酵母重組表達的木聚糖酶xynba 、脫糖基化的木聚糖酶xynbb以及橄欖綠鏈黴菌a1所產原酶xynb之間酶學性質的比較發現：三種酶的最適ph差異不大， xynb和xynba均為5 . 2 ， xynbb為5 . 0 ； xynb和xynba的最適溫度均為60 ， xynbb降為50 ：在耐熱性上， xynba由於糖基化作用熱穩定性明顯高於未糖基化的xynb和xynbb ； xynba和xynbb的比活性分別為883 . 88iu mg和832 . 51iu mg ，明顯低於原酶的比活2814 . 45iu mg ； xynb和xynba的km值相當，分別為21 . 56 （ g kg ）和20 . 87 （ g kg ） ，而xynbb的km值較大為27 . 10 （ g kg ） ； xynba和xynbb的vmax相差不大，分別為4568 mol mg ? min和5329 mol mg ? min ，明顯低於xynb的27623 mol mg ? min此外三種酶均無纖維素酶活性，對胃蛋白酶和胰蛋白酶有很好的抗性，且對作用環境中的各種離子、表面活性劑、螯合劑不敏感。通過對不同木聚糖的酶解產物的糖份分析發現：以樺木木聚糖為底物時，酶解產物主要為木三糖和木四糖，含量分別為68 . 43和16 . 50 ，另外還含有11 . 79的木二糖；以玉米芯木聚糖為底物時，酶解產物主要為木二糖和木三糖，含量分別為81 . 78和11 . 55 。
  3. Up to date, all general protection locks sold on the market use asic or eeprom as the hardware design circuit. due to their simple design and easy - to - crack, they are easy to be cracked, and their circuit design s stability is very bad. thus, it does not only protect your product invalidly, but also damage your product s image and increase the cost of technical maintenance service

    目前，一般市面上所銷售的保護鎖產品都是以asic或eeprom為硬體設計線路，由於其設計方法簡單，破解的方法容易，因此破解率極高同時該種線路設計之穩定性亦差，不僅無法有效保護貴公司的產品，同時更可能使貴公司的產品形象受損，並且增加技術維修服務的費用。
  4. Russell ( [ 17 ] ) has showed that, a compact perturbation, generated from unitary operator groups in infinite - dimensional linear hilbert spaces, is unable to make the perturbed semigroup exponentially stable

    Russell （ [ 17 ] ）曾指出，無限維hilbert空間中的酉運算元群對生成的緊擾動不能使被擾動半群具有指數穩定性。
  5. Associated with a project of the planned xuefengshan tunnel with 7. 6 km long during the construction of shaoyang to huaihua expressway in hunan province of shanghai to ruili national trunk highway, this paper firstly makes an introduction of the frequently - used analysis & computation methods for tunnel supporting structure. then, based on the analysis of the basic theory about the interaction mechanism of surrounding rock and support structure, a spatial computation model is made, a coupling numerical computation method with 3 - d elastic - plastic finite element and infinite element is proposed, and a comprehensive analysis has been made to the effects of the overall stability and safety of the surrounding rocks of different characteristics, different classes and under different construction methods. and thus the problem of 3 - d infinite region to which applying the general finite ca n ' t do has been resolved

    6公里的雪峰山隧道工程，首先介紹了隧道支護結構的常用分析計算方法；然後通過對隧道施工過程中，洞室穩定性與支護結構相互作用機理的深入分析，建立了隧道施工過程的空間計算模型，提出了採用三維彈塑性有限元-無限元耦合的數值計算方法，綜合分析了隧道在不同圍巖特性和圍巖類別條件下，以及不同施工開挖方案等對隧道圍巖整體穩定和安全性的影響，從而解決了通用有限元方法難以解決的隧道三維無限域問題；其可充分發揮有限元法在分析非線性方面的有效性和成熟性，以及無限元法在分析處理無限域和半無限域方面的精確性和簡便性，為隧道施工過程中圍巖的穩定性分析開辟了一條新的途徑。
  6. Above all, with the data acquired by tests, this thesis has analysized the lateral resistanc, longitudinal resistance and rail creep etc between ballast and sleeper before and after mass machine work, discussed the effect of mass machine on stability of continuously welded rail track, reseached the change regularity of fastening - down temperature of rail, which is resulted by mass machine work, and have settled the suitable range of work temperature which guarantees the stability of jointless railway. what ' s more, this thesis has put forward the appropriate work pattern, work temperature and work area for mass machine work in future. at the same time, this thesis has given rational suggestions about some conditions worth of attention in production of mass machine, which can in return raise the work productiveness of mass machine. at last, this thesis has considered formulating reasonable measures for operation organization and work standard, so that mass machine work can play an important role in maintenance, which can reduce work load, raise work efficiency and maintenance cost in daily maintenance

    本文通過實測的各種數據，分別對大機作業前後道床對軌枕的橫向阻力、縱向阻力、鋼軌爬行情況等進行深入分析，進一步探討大機作業對無縫線路穩定性的影響，研究大機作業引起的鎖定軌溫的變化規律，確定保證無縫線路穩定的合適作業軌溫范圍。為我國今後的大型養路機械作業提出合理的作業方式、合適的作業軌溫和作業地段，同時對大型養路機械作業中應注意的問題提出合理化建議，為大型養路機械作業提供更高的安全保障，進一步提高大機作業效率。最後，對工務段在大機作業中的配合制定完善的施工組織措施及作業標準，使大機作業在養護維修中發揮更大的作用，為工務段日常的養護維修減少工作量，提高勞動效率，降低維修成本。
  7. Most of current gsm public phones have their limitations, such as single function, upgrade with difficulty, xi ' an icechina co. ltd brought forward a new solution based on 32 - bit embedded system. the solution has it advantages on stability and expansibility, and implement remote code download, which greatly reduce maintenance cost

    現有的gsm無線公話多存在性能單一，不易升級，不易維護的問題，在此基礎上，西安易安信科技股份有限公司提出基於32位嵌入式系統的gsm無線公話解決方案，該方案具有穩定性好，易於擴展等優點，並且實現遠程代碼下載，極大降低維護成本。
  8. It can help to lengthen the service life of water quality on - line monitoring instrument, make the results of on - line water quality monitoring are more accurate and stable, and it also can reduce the maintenance loss because of the relative accuracy and save the replacing expense if the on - line water quality monitors are too damaged to repair

    可以延長在線水質監測儀的使用壽命，提高在線水質監測儀監測結果的準確性、穩定性，減少設備維護、維修工作及其費用，減少由於水質監測結果誤差帶來的損失，節省由於在線水質監測儀表損壞而無法修復，過早更換的費用。
  9. The circumstance meaning said by here is an apparent agency, the apparent agency is that one kind has no right to act for peculiarly, purpose is to trusting acting for system ' s defend people, protect a goodwill and there is no relative fault people, keep owership circulation state determining the nature indeed with the stability, ensure the safety trading further

    這里所講的情形就是表見代理，表見代理是一種特殊的無權代理，意在維護人們對代理制度的信賴，保護善意且無過失的相對人，保持物權流轉狀態的確定性與穩定性，進而保障交易的安全。
  10. Besides, based on the theoretical study, a corresponding coupling program with 3 - d elastic - plastic finite element and infinite element is developed. according to the above contents, the effects of stability and safety of the surrounding rocks of different characteristics, different classes and under different construction methods are analyzed, the good and bad about different construction methods under the condition of the same kind of surrounding rock are compared, and some useful conclusions are drawn

    此外，在本文理論研究的基礎上開發出相應的三維彈塑性有限元-無限元耦合計算機程序，並據此分析了雪峰山隧道在不同圍巖類別條件下，不同的施工開挖方案對其結構及圍巖穩定性和安全性的影響，比較了相同圍巖條件下各種施工方案的優劣，得出了一些有益的結論。
  11. Robustness with respect to small delays for exponential stability of infinite - dimensional linear systems

    關于無限維線性系統的小時滯魯棒穩定性
  12. The robustness with respect to small delays for exponential stability of infinite - dimensional linear systems has been studied since 1986

    無限維線性系統的指數穩定性對小時滯的魯棒性問題的研究始於1986年。
  13. Besides, our paper has discussed another problem, which is the non - exponential stability of infinite - dimensional linear systems under generating compact perturbation

    另外，本文還討論了第二個問題，就是無限維線性系統在生成的緊擾動下的非指數穩定性。
  14. As we know, the problem of an infinite - dimensional linear system is to decide a feedback control, such that the c _ ( 0 ) - semigroup corresponding to the closed - loop system is stable

    無限維線性系統的穩定化問題就是選擇反饋控制，使得閉環系統相應的c _ 0 -半群具有穩定性。
  15. The first part is concerned with the stability and hopf bifurcation from an equilibrium for two classes of retarded differential difference systems, while the second part deals with the existence of positive periodic solutions of retarded functional differential equations with infinite delay

    本文分兩個部分，第一部分研究兩類三維特殊的滯后型微分差分系統平衡點的穩定性和hopf分支，第二部分討論無窮時滯泛函微分方程正周期解的存在性。
  16. Usage : enriched with vitamins and natural wax that is unscented, locks in skin moisture, penetrates skin with extra strength, comprises of natural anti - oxidized ingredients

    用途：含豐富維他命成份及天然臘質，可鎖住皮膚水份的流失，無味，滲透力特強，有天然抗氧化成份，高度穩定性，可久藏。
  17. On views separation and coordinate standardization, a coordinate axis projection - based approach and an image scanning - based approach are proposed for views separation, the former reduces the compare times of 2d primitive in drawings and raises the efficiency simultaneously, the latter can separate free nember views of engineering drawing accurately and it has no correlation with complexity of primitive, then, two sets of 2. 5d coordinate systems are introduced as intermediates to relate the 2d original drawing system to the 3d space projection coordinates anfd a formal technique is developed for constructing transformation matrices between coordinates

    3 .在工程圖視圖分離和坐標規格化方面，提出了改進的坐標軸投影分離演算法和基於圖像掃描的視圖分離演算法。前者減少了工程圖中二維實體的比較次數，提高了運行效率;後者可以準確分離具有任意視圖數目的工程圖，且演算法的穩定性與邊界復雜度無關。通過引入二維半中間坐標系推導出了從繪圖坐標繫到空間投影坐標系轉換的轉換運算元並給出了基於轉換運算元的坐標規格化演算法。
  18. In this paper, we have proved that an anti - bounded c _ ( 0 ) - group in infinite - dimensional reflexive banach spaces is not exponentially stable under generating compact perturbation, and that a c _ ( 0 ) - isometric semigroup in infinite - dimensional hilbert spaces has the same property. so, we have extended and improved russell theorem

    在本文中，我們分別證明了無限維自反banach空間中的反有界c _ 0 -群和無限維hilbert空間中的c _ 0 -等距半群在生成的緊擾動下一定不具指數穩定性，從而推廣和改進了russell定理。
  19. Even if 2nd - order modification being taken into account, difference between them is quite obvious. and therefore, there are some disparities when 3d interface instability is studied by using 2d tech nique whether quantitively or qualitatively

    因此，使用二維方法來研究三維的界面不穩定性，無論是定量上還是定性上均存在一定的差距。
  20. The design of speed sensorless optimizes the system structure, reduces the maintenance expense, improves the stability and reliability of direct torque control system and has more extensive application prospect

    無速度傳感器的設計可以使直接轉矩控制系統的結構更加簡單，以減少安裝和維護的費用，利於提高系統的穩定性和可靠性，具有廣泛的應用前景。
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