useful variable 中文意思是什麼
useful variable
解釋
有效變數-
This is useful when the enumeration is a flag field and you assign a combination of flags to the enumeration variable
當枚舉是一個標志欄位並且您要將標志的組合賦給該枚舉變量時，這會十分有用。 -
The thesis consist of six chapters and based on the way of propose the question, analysis, then get the solution. it discussed and recognized what the ship transportation cost was in chapter one ; studied the environment and growing trend of the cost in chapter two ; fully discussed and demonstrated the voyage variable costs and controlling method, proposed a mathematic decision model of fuel supplying and get through the validation, proposed the concept of risking cost and addressing many controlling measures to it in chapter three ; discussed a certain running costs, proposed and validated a mathematic model of condition - based maintenance, and put forward many practical controlling method of running costs such as crew payment, repairs, spare parts, stores and lub oils in chapter four ; combining a case of monthly running cost budget and verification, performed a useful learning on running cost budget, forecast and verification in chapter five ; finally fully studied the method of cost - calculating and benefit - analyzing of time chartering container ships on a proposed route
第一章主要討論並認清什麼是船舶運輸成本；第二章研究了船舶運輸成本的生存環境和生長趨勢；第三章詳細論述並論證了航次變動成本的控制措施，提出了燃油補給方案的決策模型並給出了模型的驗證過程，提出了航次風險成本的概念並論述了若干航次風險成本的控制措施；第四章對船舶營運成本中的船員費用、維修保養費用、備件、潤物料費用等幾個主要的可控性較高的成本進行了細致的分析並分別討論了相應的控制措施，提出了基於狀態維修決策的數學模型並論證了模型的正確性及具體解算步驟，對于備件、潤物料的控制堅持以科學的預算為前提，以申領、接收、使用、盤存為控制環節，切實做到理論與實踐的密切結合；第五章結合營運成本的預核算的案例，對船舶運輸營運成本的預算及核算進行了有益的探討；第六章結合具體案例對期租班輪的成本測算與效益分析方法進行了細致的研究。 -
Abstract : polyphenylacetylenes were synthesized by rn ( nbd ) cl 2 and wcl6 / ph4sn catalyst systems in n2 at room temperature. polymers with high yield and high molecular weight were obtained. their structures were characterized by uv, ir, nmr and gpc, respectively. the fluorescence of the polymer solution with different concentration was investigated using variable excitation wavelength from uv to visible region. the relation between fluorescence and polymer structure was studied. the results showed that the molecular chain structure has great influence on fluorescence of the polymers. the emitting peak wavelength of fluorescence for the polymer of high stereoregularity is independent of solution concentration and excitation wavelength. the emitting peak wavelength of fluorescence for the polymer with disordered molecular chain arrangement varies with changing the solution concentration and excitation wavelength, and different emission sites in molecular chains and low emitting yield are shown. the measurement and analysis of fluorescence spectroscopy of polyphenylacetylenes may provide some useful information to judge the molecular chain arrangement in some conjugated polymers
文摘:使用有機金屬銠、金屬鎢/四苯基錫催化劑體系聚合苯乙炔，分別獲得了高產率和高分子量的聚苯乙炔.使用uv ， ir ， nmr ， gpc等分別對聚合物結構進行了表徵.採用不同波長的激發光對聚合物熒光性能進行研究，詳細分析了聚合物結構與熒光性能之間的關系.研究結果發現，不同聚合物結構對聚合物熒光性能產生很大影響，規整性高的聚合物，將有較高的發光量子效率；聚合物規整性差，將可能導致多個熒光發光結構點，其熒光強度降低.聚合物熒光光譜研究將對某些共軛聚合物結構的規整性分析提供一些有用的信息 -
The basic link carries out the function of the conventional fuzzy controller ; the adaptive link performs the modification of the control rules and includes three keys : the properties measurement, the rectification of controlling variable and the modification of the control rules. this method is simple. it is also flexible and convenience to modify. the result of the will testify that the design way is correct and the sa fuzzy controller is useful. for short of time, 1 just focused on theoretical discussion of acvf speed regulating system of sa fuzzy control
基礎層完成和常規模糊控制器一樣的功能；自適應層則執行控制規則的修改，包含性能測量、控制量校正及控制規則修改三個關鍵步驟。這種方案設計思路簡單、修改靈活方便，體現武漢理工大學碩士學位論文這種自適應模糊控制的優越性。山于時間，本文僅從理論角度討論了船模自航試驗調速方案的自適應模糊控制，進一步更深入的實踐研究是今後亟待完成的任務。 -
Hit counts can be useful because some bugs do not appear the first time your program executes a loop, calls a function, or accesses a variable
程序中的某些bug不會在第一次執行循環、調用函數或訪問變量時顯現出來，這時候命中次數設置就很有用了。 -
What the practical problems is often gotten is a single variable time series which has a time interval of t, reflect by a lot of interactive physics factor, containing the mark of all variates participating in movement, traditional time series analysis is to analyse going from this array to the form directly it ' s time develops, one dimension analysis loses useful information, the characteristics of phase space reconstruction method is to construct one dimension scalar quantity to high dimension vector, prop the geometry space of the state, show all dynamical information of system in phase space. the characteristic that just constructs again according to the phase space in this text, analyse the time series of responding, use the relevant knowledge of symbol dynamics and reconstruct phase space, put forward a kind of relation degree analysis method of the systematic mathematics model which has theory basis, so reach the correction of calculation mathematics model, make it accord with the actual systematic state
實際問題中常常得到的是一個時間間隔為t的單變量的時間序列，它是許多物理因子相互作用的綜合反映，蘊藏著參與運動的全部變量的痕跡，傳統的時序分析是直接從這個序列去形式地分析它的時間演變，一維分析必然喪失許多有用信息，相空間重構方法的特點是把一維標量數據構造成高維矢量，支起狀態的幾何空間，在相空間中展示系統全部動力信息。本文正是根據相空間重構的特點，對響應時間序列進行分析，利用符號動力學、重構相空間等方法，提出一種有理論依據的系統數學模型關聯度分析方法，從而達到修正計算數學模型，使其更符合實際系統狀態的目的。 -
Assigning serial different address code to different subscribers, useful signal is taken out of the same time slot and frequence, and is transmitted with one share channel. at received end, system makes use of completed address code from sending end to do correlative check and take out useful subscriber signal. the other address code signals are treated as broadband disturbing signal which is removed. in radio environment of existing variable disturbtion and muti - way declining, expand frequence signal ’ s broadband characteristics can improve system performance obviously. cdma mobile telecommunication system has some better characteristics, such as anti - disturbing 、 anti - way declining 、 secrecy 、 capacity 、 utilizing rate of frequence resource and so on, than other mobile telecommunication system
Cdma （ codedivisionmultipleaccess ）移動通信系統的技術基礎是基於擴頻技術的碼分多址，通過給不同的用戶分配各自特定的地址碼序列，將處于相同時隙和頻率的用戶信號分離開來，採用共享通道方式傳輸信息。在接收端，系統利用與發送端完全一致的本地地址碼對接收信號進行相關檢測，提取需要的用戶信號，而將其他使用不同碼型的信號視為寬帶干擾而從中剔除掉。 -
Inverted pendulum system is a typically rapid, multi - variable, nonlinear, absolutely instability system, and it is the favorite problem in the control theory and application. because it is a typical experiment device to test the modern control theory, and also it " s control technique and idea is useful to average industrial process
倒立擺系統作為典型的快速、多變量、非線性、絕對不穩定系統，一直是控制理論與應用的熱點問題，因為它不但是驗證現代控制理論方法的典型實驗裝置，而且其控制方法和思路對處理一般工業過程亦有廣泛的用途。 -
Kriged interpolation maps provided good indication of the spatial variability in crop yield and growth status. spatial interpolation and correlation analysis proved that spad lai was more indicative of crop growth status than individual variable, and useful for implementing growth season regulation and topdressing as needed
克里格插值圖可很好地描述作物長勢和產量的空間變異，空間插值分析與相關分析結果都說明，採用spad * lai二乘因子較之單個變量能更精確反映作物長勢，從而有助於實施產中調控和按需補給。 -
The rotor velocity and position can be taken as two states variable of the system by using the ekf on the basis of the theory of the bldcm. based on the measured stator currents and stator voltages, we can estimate the rotor velocity and position. it is very useful for us to study the application of the velocity and position sensorless operation of brushless dc motor drives
在直流無刷電機的原理基礎上，利用擴展卡爾曼濾波器將轉子轉速和位置看成系統的兩個狀態變量，根據定子側可測的電流、電壓值，逐步估計出轉子轉速和位置，為無速度和位置傳感器無刷直流電機控制系統打下基礎。 -
However, these assertions are limited to primitive operations, such as " assert equal on two variables " and " assert not null on a reference variable. " the primitive junit assertions are useful, but they don t represent the many complex assertion abilities you need in real - world software unit - testing scenarios
然而，這些斷言僅局限於基本操作，例如「斷言兩個變量相等」和「斷言引用變量非null 」 。基本的junit斷言是有用的，但是它們無法給出在現實的軟體單元測試場景中所需要的眾多復雜的斷言能力。 -
Describes useful variable - like commands that display useful information in variable windows
描述一些有用的支持變量的命令，這些命令可用來在變量窗口中顯示有用信息。 -
Secondly, we describe the method and standard of corporation performance appraisal, after making clearly the goal of appraisal, we decide on the useful variable system for the following positive analyzing
二、國內外經濟學者運用各種評價方法得出的有關公司並購績效優劣的結論不盡相同，借鑒現存的公司績效評價體系，本文明確指出上市公司績效的評價目的。 -
The code of a newly generated test compiles, but before it can provide useful test results you must to edit it, for example, to make variable assignments and to customize assert statements
新生成測試的代碼將進行編譯，但是在它能夠提供有用的測試結果之前必須對其進行編輯，例如為變量賦值和自定義assert語句。
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