In view of bearing capacity of the elastoplastic theory analysis, the author made a comparison between the achieved bearing capacity limit load pi / 4 of round base ( space problem ) and the limit load pi / 4 of bar groundwork foundation design ( plane problem ) from soil mechanics at home and abroad as well as foundation criterion, and explained why the value of formula in present design criterion from soil mechanics is inclined to be conservative. in the light of the author ' s many years experience of vibration test on the spot and the research work of relevant projects, the author worked over the dynamic pile testing of the bearing capacity of foundation and batholith, and gathered the parameter of dynamic analysis and testing. the author also talked over the difficult point of pile foundation design criteria in present batholith engineering world, i. e. the confirmation of batholith bearing capacity of pile end, from the following aspects : a ) confirmation of single axis counter - pressure strength of rock in house ; b ) f. e. m calculation of elastoplastic model ; c ) calculation of soil mechanics ; d ) deep well load test
然後,對巖土工程領域至今尚未解決,甚至不為人注意的考慮地基變形的地基承載力問題進行了實用化的探討,提出了考慮地基變形的地基承載力上程計算方法;對基於彈塑性理論分析的地基承載力國內尚未見報道的空間問題得到了圓形基礎(空間問題)的承載力界限荷載p _ ( 1 / 4 ) ,並與國內外土力學專著及地基基礎設計規范中的條形基礎(平面問題)的界限荷載p _ ( 1 / 4 ) ,進行了對比,從而定量上解釋了目前設計規范引用土力學承載力公式值偏於保守的這一情況;根據本文作者多年從事現場地基工程振動試驗及相關課題的研究工作,本文以截頭錐模型模
擬地基,對地基(巖基)承載力的動測法進行了研究,為各類地基(包括巖基) ,匯總了動力分析和檢測川的參數:針對日前巖土工程界應用樁基設計規范中的難點? ?樁端巖基承載力的確定問題,從巖石室內單軸抗壓強度確定、基於彈塑性模型的有限單元法計算、土力學計算及深斤載荷試驗四方面進行了深入討論;本文作者根據多年現場載荷試驗的工程實踐,對深井荷試驗裝置的
核心部分? ?反力裝置,設計了側壁支撐反力加載系統,該加載系統具有實用、簡便、穩定及安個等優點。
We first present a number of desiderata for an xml - based query language, and based on this criterion, we introduce the syntax of a simple core ian - guage for semistructured data and then describe four extensions that have resulted in working prototypes. second, we present the algorithm for computing the result of a regular expression on data graph with cycles, the first - order interpretation of querying language for semistructured data, and explore structural recursion and bisimulation in semistructured data and propose an efficient and systematic way to computing a bisimulation between the two graphs. we also proposed and implemented a web querying system with database features
基於這些準則,對一個簡單的半結構數據查詢
核心語言的語法提出了兩方面擴充;給出了計算數據圖中正規表達式的演算法;對半結構數據查詢語言的一階邏輯描述、結構遞歸和數據圖的雙態模
擬( bisimulation )等問題進行了研究,提出了一種判定數據圖的bisimulation演算法;在xml數據查詢語言研究的基礎上,設計並實現了一種具有數據庫查詢特性的web查詢系統原型。
In the next place, by studying the change of the resonant frequency of the whole system, this paper designs the circuit to track the resonant frequency of the system by cd4046 mainly. at the same time, in order to improve the efficiency and get better dynamic capability of the converter, we choose pll and fuzzy control after comparing the pll circuit, fuzzy circuit and pll ? fuzzy control circuit. in the end, this paper brings forward the control blue print to realize the drive control circuit of the high frequency converter, using the dsp chip as the key part to realize four routes of pwm drive pulses with dead band of the control system
其次,通過對整個系統諧振頻率變化的分析和研究,設計了以鎖相環cd4046為
核心的鎖相環控制電路,同時,在綜合比較鎖相環控制、模糊控制以及模糊控制和鎖相環復合控制三種控制演算法的基礎上,進行了系統模
擬,得出採用復合控制可使跟蹤電路既具有鎖相環路較好的穩態性能,又擁有模糊控制較好的動態性能,系統魯棒性能好,同時也提高了逆變器的效率。
The system comprises three modules : the first is the ccd driver module, which controlled with cpld. programming the cpld to produce ccd driving pulses and synchronized communication signals. after preprocessing, the output video signals are transmitted into high resolution adc module, in which they are converted into digital signals, and then processed in arm processing module
整個系統分為三個模塊: ccd驅動模塊的
核心是一片復雜可編程邏輯器件( cpld ) ,對其編程產生ccd的驅動脈沖及同步控制信號;視頻輸出信號經預處理后,由高精度ad轉換模塊進行采樣,將ccd輸出的模
擬信號轉換成數字量;最後,將數據送入arm處理系統中進行后續處理。
It is legitimate to envisage a more or less one-to-one correspondence between cloud nucleus concentration and the concentration of cloud droplets.
擬想雲
核濃度與雲滴濃度之間有或多或少的一一對應關系是合理的。
Furthermore, based on the proposed new charge pump circuit, a iv to 3. 3v high voltage generator which is used in analog switch circuit and a 3v to 10v high voltage generator which is applied to eeprom or flash memory are designed, the components and design thought of two high voltage generators are also discussed in detail. and the simulations of two high voltage generators are accomplished by tsmc 0. 18uw cmos technology ( t018u ), the outcome testifies that two high voltage generators that take the new charge pump as the core circuit have the higher performance
此外,基於新型的電荷泵電路,設計了用於模
擬開關電路的1v到3 . 3v的高壓產生系統和用於flashmemory的3v到10v的高壓產生系統,詳細討論了兩種高壓產生系統的電路組成和設計考慮,並用臺積電0 . 18 mcmos工藝( t018u )對兩種高壓產生系統進行了hspice模
擬,結果表明以新型電荷泵電路為
核心的兩個高壓產生系統都具有較高的性能。
Thus, the vhdl is carried to make a design for the forenamed algorithms, and the design is validated by simulation
因此,本文用vhdl語言實現了ca邊緣檢測演算法模型的基本內
核設計,並通過時序模
擬,進行了演算法的硬體設計與效果驗證。
Once title has been approved, fsi section or the appointed firm of solicitors will prepare the assignment and the deed of mutual covenant for execution by the former owner
業權一經
核妥,財政司司長法團事務組或受委託的律師行,便會草
擬及安排前注冊業主簽署轉讓契據及大廈公契。
Subject to approval by the motc, chunghwa post may write terms and conditions to be printed on the postal money orders or postal gift coupons
郵政匯票及郵政禮券應記載事項,由中華郵政公司
擬訂,報交通部
核定。
On the basis of optoelectronic dynamics and nucleation and growth model, we simulated photosensitive process by the following steps : the creation of optoelectrons, carriers " transmission and decay, until the formation of latent image. in our simulation code, monte carlo method was adopted in order to simplify the algorithm
本工作以光電子動力學理論為依據,利用成
核生長( nucleation & growth )理論模型,並在此基礎上採用montecarlo方法,模
擬了光電子的產生、遷移、衰減、直到形成潛影中心為止的感光過程。
This article combines the theory and reality ; try to explore the major effects and changes of relationship between consumers and business from the retail aspect, and tries to show how to gather all the resources efficiently with the real case of shijiazhuang guoda group, how they developed the multiple shop to a sale station, a service station, a circulation station and an information station for merchandise, how they made the geographical shop well - combined with the virtual online sale and improved the competition power of the company, the main objective is to share the experience with the sister industry
本文通過理論與實際應用相結合,從流通創新角度論述電子商務實現了消費者和企業之間信息的快速互動式溝通,使流通業發生了深刻變革,對整個流通業產生的革命性影響,並以石家莊國大集團公司為案例闡述了如何有效進行資源整合,將連鎖便利店發展成為商品的銷售站點、服務站點、物流站點和信息站點的快捷便利的服務平臺,將地理性店鋪網路與虛
擬性網上銷售有機結合,提升了企業
核心競爭力,旨在為同業提供可借鑒經驗。
Staff at lawrence livermore say it takes their best computers six weeks to simulate what happens inside a warhead when it is going off
勞倫斯-利弗莫國家實驗室的研究員講道,他們花了六個星期的時間用最好的計算機來模
擬核彈爆炸時彈頭內的變化。
A draft verification report shall provide the project proponent with any concerns and conclusions related to the claimed emission reductions
核查機構應向項目方提交草
擬核查報告說明所有與主張的減排量有關的問題。
This chapter proposes three conceptions, i. e., kernelled quasidiferential, star - kernel and star - diferential, and establishes their operational properties. a sufficient theorem and a sufficent and necessity theorem for a quasi - kernel being a kernelled quasidiferential are proven. both the existence of star - kernel for a quasidiferentiable function and the existence of star - differential for a direnction - ally diferentiable function are established
在這一章里,首先給出
核擬微分,星
核與星微分的定義及其它們的運算性質;然後證明了
擬核微分的一個充分條件定理及一個充要條件定理;最後討論
擬可微函數星
核的存在性及方向可微函數星微分的存在性以及penot -微分與上下導數之間的關系。
In this paper, by neutron radiation detection with the passive method, the study on detectability, neutron spectra, etc. for the plutonium combined systems including the stimulated nuclear warhead assembly are introduced
摘要介紹了通過探測中子輻射,用被動方法研究了包括模
擬核彈頭裝置在內的各杯組合系統的可探測性和中子能譜等內容。
The y rays detecting system for physical diagnosis in nuclear exploding must be calibrated in the pulse radiation field according to field spots. so the 12mv pulse x rays accelerator and the fast neutron reactor are selected as radiation sources for calibrating
核爆物理診斷探測系統需要在脈沖輻射場中按場點光子注量進行標定,為模擬核爆產生的輻射場,選定12mv脈沖x射線加速器和快中子脈沖堆為標定用脈沖輻射源。