短時間常數 的英文怎麼說
中文拼音 [duǎnshíjiānchángshǔ]
短時間常數
英文
fast time constant-
" artel was appointed f5 networks distribution agent in hong kong and china in march this year. we are very proud to announce that within a few months, we have become one of f5 networks chief distribution agents
宏通主席游本宏先生表示：宏通在今年三月底才取得f5networks中國和香港區的代理權，在短短數月的時間已能成為f5networks全球最大的代理商之一，我們實在非常高興。A highly efficient numerical algorithm by using multi - grid method ( mgm ) is introduced to solve the three dimensional field distribution in the present paper. formulae of the restriction and prolongation in mgm computation is deduced, and a 3d program of mgm is accomplished, which can solve the field distributions in electron optical systems for various electrostatic lenses. the 3d field distribution in an electrostatic concentric spherical model is tested with mgm algorithm and an algorithm based on finite difference method ( fdm ) respectively. comparing these two results in view of computational efficiency and computational accuracy, it appears that mgm is superior to fdm in solving electrostatic field distribution for the electron optics problem. this paper shows that the 3d field computation using mgm greatly improves the computational efficiency of field distributions in electron optical systems and shortens the computational time
本文將一種高效率的數值計算方法? ?多重網格法引入三維靜電場分佈的計算，多重網格法利用限制和延拓可迅速求得滿足精度要求的場分佈.研究了求解各種靜電透鏡電子光學系統三維場分佈的多重網格法程序，驗算了靜電同心球模型的三維場分佈.通過與目前在場計算中常用的有限差分法進行比較，可以看出多重網格法的計算效率和計算精度優于有限差分法.本文表明利用多重網格法計算三維場大大提高了場分佈的計算效率，縮短了計算時間，因此為后續計算打下了良好的基礎So in fact, if they senesce just a tiny tiny bit over time - - that is, if their half - life gets shorter, very very slowly - - we wouldn ' t actually be able to tell that this was happening in the time that we took our measurements, because the acceleration in the rate of atoms decaying ( relative, of course, to the number that had not decayed already, which is always decreasing ) would be too tiny to be statistically detectable
所以在事實上，如果它們隨時間衰老得只那麼一點點， ?就是說，如果它們的半衰期縮短得非常慢?那麼我們實際上不可能知道，在我們測量期間發生過衰減，因為原子衰減的速率加速得太小，統計學上檢測不出（當然，是相對于不曾衰減的數目而言，不曾衰減的原子數目總是在減少） 。On the other hand, by the statistical analysis of historical flow data, the system can model the network traffic flows, and forecast short - term network flows. after that the system can analyse the network traffic abnormity. by use of the netwok management system and network security facility, we can setup a security infrastructure to monitor flows in real time, predicts the future flows, alarm some abnormal flows, respond to the abnormity automatically and immediately
論文通過定期採集網路關鍵設備，包括匯聚層和核心交換層的流量情況，處理后以結構化、層次型的方式保存起來，一方面提供了圖形化的用戶介面，將收集的各種歷史數據和實時數據在其中以圖形的方式直觀地顯示出來，另一方面通過對歷史流量數據的統計分析，從而對網路流量進行建模，短時間預測網路流量情況，實現對網路流量異常情況的觀察分析，利用有充分響應能力的網路管理系統和網路安全設備，構成響應和預警的綜合安全系統。The study shows that the early and late seed rains of constructive tree species in evergreen broadleaved forest at chongqing simian mountain had no activity. the bigger the seeds of the species and the earlier or later the seeds of the species matured, the higher the proportion of the seed rain damaged by animals. the quantitative variation of seed rain, active seed rain and seed bank did not take place at the same time. at early time, the number of seed banks of castanopsis fargesii, lithocarpus glabra, quercus myrsinrefolia, castanopsis plasyacantha, cinamomum subavenium. which own more active seed rain increased by geomitric series. the seed banks of castanopsis orthacantha and schima argentea were small, only survived a short time, and did not sprout next year. the quantitative dynamics of seed banks and their increasing or decreasing rates were decided by the proportion damaged by animals, dying speed of seeds and their resistance to pathogens and adverse circumstances, and the state of seed germination
對重慶四面山常綠闊葉林建群種種子雨、種子庫的研究表明，建群種早期和晚期的種子雨無活力;種子偏早或偏晚成熟及大籽粒的樹種，其種子雨被取食的比例大;種子雨、有活力種子雨、種子庫三者的數量變化不一致;有活力種子雨量較大的栲、石櫟、小葉青岡、扁刺栲、香桂等，其種子庫密度在早期以近幾何級數的方式增長，元江栲、銀木荷種子庫小，存在時間短，翌年無一年生萌發苗;種子庫數量動態、消減率動態決定於種子被取食的強度、種子衰老的速度以及種子對病菌、逆境的抗性和種子萌發的整齊性This means the effects can be reduced by long - term continuous observation. but for the short - time observation, for example, the determination of zenith delay, the effects ca n ' t be reduced obviously, because the interval between the zenith delay parameters is often short
這說明長時間的連續觀測可以削弱海潮的影響，但對于短期的觀測，比如在估計天頂延遲量時，由於估算天頂延遲參數的時間間隔通常較短，海潮的影響還是不能很好地抵消。What ' s more, most fevers go away in a relatively short time ? usually within a few days
除此而外，多數發燒通常時間較短，一般幾天就沒了。Red tide occurs randomly, with short duration and large incidence. airborne hyperspectral remote sensing technique can play an important role in red tide ' s monitoring. and the precondition is to acquire in situ spectral data of red tide, to grasp red tide ' s spectral characteristics by data processing and analysis and to set up spectral library of different dominant species of red tide
赤潮是海水中的浮游生物在一定條件下過度繁殖或聚集致使海水變色的一種生態異常現象，因其具有隨機性、突發性、持續時間短、影響范圍大等特點，客觀上要求利用航空高光譜遙感技術對其進行監測；但首要的前提與基礎性工作是大量獲取赤潮水體的現場光譜數據，通過處理與分析，掌握其光譜特性，不斷充實赤潮優勢種類的光譜數據庫。Rising computer power has recently enabled wireless devices operating in these upper bands to offer gigabits per second of instantaneous bandwidth within very small areas, or “ picocells, ” of coverage
電腦運算效能提高，也讓無線裝置可在這些較高的頻帶運作，在非常小的區域（即所謂的微微細胞）內，提供每秒數十億位元的短時間頻寬。By combining spreading models, population data extracted from real internet worm epidemics, and measured models of internet topology, we have shown that any reactive worm defense will require extremely widespread deployment and very short reaction times ( a few minutes or less )
通過結合傳播模式、數量等從實際的網際網路蠕蟲的傳播得來的數據，以及對網際網路拓撲結構的測量，發現任何反應式的蠕蟲防禦需要廣泛的部署和非常短的反應時間（即分鐘或更少） 。Introduce pre - aggregated or summarized data to satisfy common query requirements and improve query response times
引入預聚合或匯總數據以滿足常見的查詢要求，並縮短查詢響應時間。At the first lesson, and within a very short time, the instructors succeeded in teaching us how to cook several practical and easy - to - learn dishes. these included a refreshing apple and spinach salad, tofu steak, and tomato and lettuce soup
三月份上課內容是各國家常菜，第一次上課，在短短時間內老師就教會大家數道實用又好學的菜肴，包括：爽口的蘋果菠菜沙拉豆腐素排蕃茄生菜湯。In this work, the influences of fabrication process on microstructure, dielectric properties, ferroelectric properties and pyroelectric properties of plt films have been studied. plt films were prepared on the pt ( 111 ) / ti / sio2 / si ( 100 ) substrates by radio frequency magnetron sputtering method and then annealed by rapid thermal annealing process ( rta ) or conventional furnace annealing process ( cfa ). with the help of atom force microscopy ( afm ), x - ray diffraction ( xrd ) and some other apparatus, it was found that : lower substrate temperature ( ts ) was helpful for plt films to form better surface morphologies. with the increase of substrate temperature, the dielectric constant of plt films increased
Afm 、 xrd以及性能測試結果表明:較低的基片溫度有利於形成表面均勻緻密的薄膜，且薄膜的表面粗糙度均方根較小;隨著基片溫度的升高，經過快速退火的plt薄膜的介電常數逐漸增大;相比于傳統退火，快速退火縮短了退火時間，提高了薄膜的介電和鐵電性能;快速退火隨著保溫時間的延長，大部分鈣鈦礦結構的特徵峰的峰強增大，半高寬減小，峰形越來越尖銳，但當保溫時間為80s的時候， （ 100 ）和（ 110 ）峰的強度有所下降，因此保溫時間在60s較為適宜。In general, the goals should be achieved in as few sessions as possible to minimize the number of times the donor area is accessed and be the least disruptive to the patient ' s life
總體上來講，最理想的結果是盡可能達到最少的手術次數、最短的供區手術操作時間、最低限度地影響患者的日常生活。It also introduces the producer ' s system of sbeg. analyses the production process and makes a proposal to improve it. according to the reality of sbeg, on principle of lean thinking, it designs some projects in order to put lp in practice, especially how to ameliorate the equipments of abrade to realize continuous process ; it also analyses operation change approaches in detail in order to offer some suggestions to shorten the operation change time and it brings forward maintenance methods fitting the continuous process, especially the use of statistics in forecasting maintenance
根據sbeg的實際情況，基於精益思想的原則，設計了精益生產方式實施的具體方案：為了實現屏生產線生產連續流程，根據sbeg的具體情況，設計了屏后加工設備改造的方案，並對不同品種產品所需后加工各工序設備數，以及對應的節拍進行了計算；針對目前錐成型作業轉換時間長的狀況，分析了作業轉換的詳細步驟，提出了縮短作業轉換時間的具體方法；設計了全面設備維修方案，以保證連續流程的正常進行，並將數理統計方法應用到制定預測性維修方案中。In this paper, some experiments about the algorithms and decline models above using test performance data of teflon type coat materials gained by the simulated radiation experiments are presented, and some comparative experiments are presented. compare the experimental results with the prediction result of international simple exp model and the actual experiment data among nine years in america. at the same time, do universal compares of experimental results with test data, which are obtained with various models and algorithms and different radiation time
接著本文通過採用美國teflon型塗層材料較短輻照時間所得試驗數據進行參數估計和建模預測，並把實驗結果和國際通常採用的簡單指數模型的預測結果以及美國9年時間跨度的實際試驗數據進行了比較，同時還對同一種模型以及同一種演算法採用不同輻照時間段對應的試驗數據所得實驗結果進行了多項比較。The use of wave packet to analyze the dynamics of quantum mechanical systems is an increasingly important method to the study of the classical - quantum correspondence. using the quantum gaussian wave packet analysis method, we calculate the autocorrelation function of the rectangular billiard, the peak positions of the autocorrelation function match well with the periods of the classical periodic orbits, which show that the period of the classical orbits can be produced by the time - dependent quantum wave packet method. we also discuss wave packet revivals and fractional revivals in the rectangular billiard, the results show that there are exact revival for all wave packet at each revival time. we find additional cases of exact revivals with short revival times for zero - momentum wave packets initially located at special symmetry point inside the billiard
利用波包分析量子力學體系的動力學行為在研究經典和量子的對應關系方面越來越成為一個非常重要的方法.利用高斯波包分析方法，我們計算了矩形彈子球體系的自關聯函數，自關聯函數的峰和經典周期軌道的周期符合的很好，這表明經典周期軌道的周期可以通過含時的量子波包方法產生.我們還討論了矩形彈子球的波包回歸和波包的部分回歸，計算結果表明在每一個回歸時間，波包出現精確的回歸.對于動量為零的波包，初始位置在彈子球內部的特殊對稱點處，出現一些時間比較短的附加的回歸In the flight experiment of aircraft, the mass data acquisition, storage and transfer is always one important part of system, especially for the measurement of parameters such as temperature and pressure of cockpit. in order to meet these needs, we design this simultaneous data acquisition system with multi - channel and large - capacity, which is based on single chip microprocessor and usb interface. it overcomes some shortcomings of traditional devices such as : big size, short work time, small memory capacity etc. it also has many advantages of high speed, low power dissipation, ease - of - use, ease to expand port, supporting plug - play, low - cost etc, so it will be used very widely
在飛機的飛行試驗中，海量數據的採集、存儲和傳輸一直是系統非常重要的一部分，尤其是對飛行員駕駛艙環境控制系統的溫度、壓力等參數的測量來說更是如此。本文根據課題實際需要，研製的基於單片機和usb介面的多通道、大容量、便攜式數據採集系統，克服了現有設備體積大、工作時間短、存儲容量小等缺點。同時，本系統還具有功耗低、速度快、使用方便靈活、易於擴展、支持即插即用、成本低廉等一系列優點，具有廣泛的應用前景。Circuit model of synchronous machine and the quantitative process during short - circuit period are deduced. many parameters of synchronous machine except for transient time constant can be identified in a short time with the elaborately designed algorithm
文中給出了同步機電路模型，定量分析了三相突然短路的過渡過程，所研製的計算機演算法可在較短的時間內辨識出除暫態時間常數外的同步機的諸多參數。When coaxial - line probe is used to measure the permittivity of biological tissues, the pulse is used as an excitation in order to get more information in frequency domain. so frequency - dependent finite difference time - domain method is used to calculate the forward problem. it need not change the pulse into frequency - domain, and can calculate the problem in time - domain, which saves the memory space and makes calculation fast genetic algorithm ( ga ) is used to solve the inverse problem
在同軸線用於獲取生物組織的介電常數的研究中，為了獲得更多的頻域信息，採用脈沖作為激勵，故數值計算的方法採用基於頻域的時域有限差分法，該方法不用將脈沖變為頻域問題，可在時域中直接求解，因此極大節約了計算空間，在短時間內可計算完正問題。分享友人