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  • [數] 數學表達式

  • 例句

  • The electromagnetic field and the electromagnetic wave objective law describes with the Maxwell equation set and other mathematical expression.

    電磁場與電磁波的客觀規律用麥克思韋方程組和其他一些數學表達式描述。

  • The size normalization of notations is a common pretreatment method in mathematical expression recognition, and it has a great significance to enhance the efficiency of notation recognition.

    符號的大小歸一化是數學表達式識别的一種很常見的預處理方法,它對于提高符號的識别率具有重要的意義。

  • The work theory of parallel multi-roll straightener is first introduced in chapter two, and the key parameter's mathematical expression is acquired and simplified according to engineering application.

    第二章首先介紹了平行多輥矯直機的工作原理,并推導了影響矯直效果的關鍵參數的數學表達式,并根據工程應用進行簡化。

  • Recognition of Mathematical Expressions is to transform the Mathematical Expression in the scientific and engineering documents into electronical documents.

    數學表達式的識别是将科學和工程文獻中的數學公式轉變成電子文檔的一種形式。

  • Mathematical expression for identifying the target miss in azimuth is inferred by analyzing the relative state of motion of the missile and target in the rendezvous phase.

    通過對彈目交會段導彈與目标相對運動關系的分析,得出了識别目标脫靶方向角的數學表達式;

  • This paper narrates this system principle of work , and infers this system dynamic response mathematical expression .

    文中介紹了該系統的工作原理,并推導出該系統的動态響應數學表達式。

  • A general mathematical expression for the workspace has been given.

    導出了工作空間的一般數學表達式。

  • Mathematical expression of longitudinal transient deformation of tyre tread imprint under motion condition has been derived.

    計算出運動狀态下輪胎印迹縱向瞬時變形的數學表達式。

  • The mathematical expression and the topological construction of the new model are presented.

    提供了該預測模型的數學表達式和拓撲結構。

  • The physical characteristic and mathematical expression of superrefraction layer in lower troposphere are illustrated.

    描述了低對流層中超折射現象的物理特性和數學表示;

  • Through studying various types of rollers of a spatial cam mechanism, the paper presented their unified mathematical expression models.

    通過對空間凸輪機構各種從動件滾子的研究,給出了不同類型滾子的統一數學表達模型。

  • The conditional assumptions and the mathematical expression of this model are presented and the physical and physicochemical parameters in polymer flood taken into consideration are discussed.

    給出了該模型的假設條件和基本數學式,讨論了納入該模型的聚合物驅物理物化參數。

  • The mathematical expression for the surface profile was put forward based on the analysis on the mechanism of forming for shadow mask.

    通過對蔭罩成形機理的分析,提出了蔭罩表面型面的數學表達式。

  • The mathematical expression was demanded by the new mathematical curriculum standard in China. It also marked the ability and development of all qualities of the students in learning mathematics.

    數學表達是數學課程标準的要求,也是評價學生數學學習能力和素質全面發展的重要指标。

  • The mathematical expression of this model is a second order non linear ordinary difference equation.

    該模型的數學形式是一個非線性二階常微分方程,利用有限差分方法進行求解。

  • The mathematical expression of ventricular depolarization vector has also been developed from theory of the polarization field.

    從極化場出發導出了心室除極向量的數學表達式。

  • From the conception of X ray diffraction of electrons in an atom, the mathematical expression of X ray diffraction for an atom in a crystal cell is given.

    從原子中的電子對X光散射的概念出發,對任意一個晶胞内的任意一個原子産生的X光衍射給出了具體的數學描述。

  • A mathematical expression for such development indexes as recovery rates and rocovery percent of reserves is established on the basis of the FWG1 exponential decline development model.

    本文提出了FWG1 幂指數遞減開發模型,提出了開發速度,采出程度等開發指标的數學關系式。

  • The answer was, find a mathematical expression depending on the number of inputs.

    很不錯,答案是,找到一個通過輸入數字,計算出來的數字表達式。

  • The mathematical expression derived can be served as a mathematical model for CAM and computer graphics.

    為了解決這一問題,本文為計算機輔助制造與計算機繪圖建立了數學模型。

  • By testing, the mathematical expression of the input voltage and the output contact force provided by actuators is obtained.

    通過試驗,得出了施加給壓電陶瓷驅動器的電壓與阻尼器摩擦接觸面上産生的正壓力的數學關系。

  • Methods:Using the MRI inversion recovery technology systemically in theory and get the mathematical expression of the zero signal point.

    方法:從理論上對核磁共振成像反轉恢複技術進行系統研究,獲得零信號點的數學表達式。

  • The concepts such as mathematical expression, stack operation and binary tree traversal must be presented in data structure.

    數學表達式、棧的操作、二又樹的遍曆,這幾個概念在數據結構的教材中是不可缺少的。

  • The last is to pay attention to link between elementary mathematics and advanced mathematics, and attach great importance to the mathematical expression of the physical connotation.

    關注初等數學和高等數學的聯繫,重視數學表達式的物理内涵等,文章同時給出了加強大學物理和中學物理銜接的建議。

  • The influencing factors of the uncertainty of measurement for the content of monosodium glutamate of chicken essence seasoning were discussed and modeled by mathematical expression.

    分析雞精調味料中谷氨酸鈉含量測量不确定度的影響因素,建立數學模型,對各不确定度分量進行了分析和計算。

  • The results obtained by both numerical simulation and the measured rock temperature in bores proved that the mathematical expression of temperature distribution law is close to practice.

    數值模拟法和地質鑽孔測溫法所得結果證明,新的地溫場溫度分布規律表達式是符合客觀實際的。

  • The mathematical expression of the kinetic compensation effects of these thermal decomposition reactions had been obtained.

    此外還得到了該系列配合物的熱分解反應動力學補償效應表達式。

  • 專業解析

    數學表達式(Mathematical Expression) 是指由數字、變量、運算符、函數符號等按數學規則組合而成的符號序列,用于表示一個數學概念、關系或計算結果。它不包含等號或不等號(如“=”“>”),因此區别于“方程”或“不等式”。例如,( 2x + 5 ) 或 ( sin(theta) ) 均為表達式,而 ( 2x + 5 = 10 ) 則為方程。

    核心要素:

    1. 變量(Variables)

      表示未知量或可變量,通常用字母(如 ( x, y ))表示。例如,在表達式 ( 3a - b ) 中,( a ) 和 ( b ) 是變量。

      來源:美國數學協會(Mathematical Association of America)《數學術語指南》

    2. 常量(Constants)

      固定數值(如 ( pi approx 3.14 )、自然常數 ( e ))或具體數字(如 ( 5, -2 ))。

      來源:國際标準 ISO 80000-2《數學符號與定義》

    3. 運算符(Operators)

      包括算術運算符(( +, -, times, div ))、指數(( ^ ))、根號(( sqrt{} ))等。例如,( x + 4 ) 中的“+”和“^”為運算符。

      來源:普林斯頓大學數學教材《代數基礎》

    4. 函數(Functions)

      如三角函數(( sin, cos ))、對數(( log ))等。表達式 ( log_{10}(100) ) 中的“log”即為函數符號。

      來源:《數學百科全書》(Encyclopedia of Mathematics)函數定義章節

    示例與應用:

    與相關概念的區别:

    數學表達式是數學推理、公式推導和科學計算的基礎工具,廣泛用于物理、工程、計算機科學等領域。

    網絡擴展資料

    "Mathematical expression"(數學表達式)指由數學符號、數字、變量、運算符等元素組成的結構,用于表示數學關系、運算或邏輯。以下是詳細解析:

    1. 基本構成
    1. 核心特征
    1. 分類

      • 算術表達式:純數字運算($5×(3+2)$)
      • 代數表達式:含變量和系數($4x - frac{1}{2}y$)
      • 解析表達式:含特殊函數($sin(theta) + e^{x}$)
    2. 應用場景

    數學表達式是科學研究的通用語言,其精确性和抽象性使其成為描述自然規律與工程原理的基礎工具。理解表達式的結構有助于解析複雜數學問題和進行公式推導。

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