理论推导
Theoretical derivation was carried out upon thermal deformation of hollowed parts under operating conditions.
且对孔形零件在工作情况下的热变形进行了理论推导。
On the base of lots of experiments and theoretical derivation, the radiation mechanics of UHTC material was analyzed.
在大量实验及理论推导的基础上，对超高温陶瓷材料辐射机理进行了分析研究；
Through lots of finite element examples and theoretical derivation, the formula for calculating stability ultimate bearing capacity of BDRM was achieved.
通过大量有限元算例并结合理论推导，获得了这类构件的稳定承载力计算公式；
By a theoretical derivation of BP and RM algorithms, the algorithms are the same on principle.
通过对BP算法和RM算法的理论推导，从原理上说明了两种算法的一致性。
The settlement correction factors for vacuum preloading and vacuum combined surcharging preloading are established based on theoretical derivation.
通过理论推导，建立了真空预压及真空-堆载联合预压作用下地基沉降修正系数公式。
Calculation shows that the theoretical derivation and numerical results are correct.
计算表明，本文的理论推导是正确的，数值结果是可靠的。
Considering existing limitation, a full-fresh voltage multiplying bridge rectifier circuit is presented, and the theoretical derivation and numerical simulation are carried out.
针对它们存在的不足之处，提出了一种全新的倍压型桥式整流线路，并对此线路进行了理论推导和计算机模拟仿真。
Methods Using the fundamental solution of the biharmonic operator, the sequence of fundamental solutions is defined and theoretical derivation is given.
方法利用重调和算子的基本解，定义一基本解系列，进行理论推导。
The formulas for calculating equation of saw cutting speed and kinematic equation of saw cutting and cutting area are derived through theoretical derivation in detail.
通过详细的理论推导 ，推出单颗金刚石磨粒锯切速度方程、锯切运动方程和切削面积的计算公式 。
On the basis of acoustic theory, combined with lab experiments and theoretical derivation, the dissertation presents a thorough study of the mechanism of ultrasound's effect on viscosity reduction.
该论文以声波原理为指导，结合室内实验和理论推导，深入探讨了超声波降粘的作用机理和作用效果。
Results from both theoretical derivation and numerical simulation prove that the proposed algorithm is correct.
理论推导和仿真实验证明了所提算法的正确性。
The simulation results confirm our theoretical derivation.
最后仿真结果证实了我们的理论推导。
Through theoretical derivation, it was seen the change in the slope of the first order mode shape of damage element was greater than zero.
理论推导证明，当剪切型框架结构发生损伤时，损伤单元振型斜率的变化大于零，由此可判别损伤位置。
This paper presents a mixed self adaptive design method by taking the state MRAC scheme from a reference model. It gives a detailed theoretical derivation and simulation proof.
在从参考模型取状态MRAC方案的基础上，提出了混合自适应设计方法。文中给出详细的理论推导和仿真验证。
The paper deduces the theoretical derivation of figure coefficient of wind load in wing tunnel test, which can do help data processing of wing tunnel test.
较详细的演绎了风洞测压试验中关于风载体型系数的理论推导公式，为风洞试验数据处理提供了帮助。
By theoretical derivation, the partial derivatives of the deviation between the humidity sensing characteristic curve and the fitting line to the self-resistance are obtained.
通过理论推导，获知了湿敏电阻器的感湿特性曲线与拟合直线之间的偏差随其本体电阻的变化关系。
By theoretical derivation and sample analysis, the structure law of ship radiated-noise demodulation -spectrum harmonic clan feature and correlative questions are investigated.
通过理论推导和样本分析，研究了舰船噪声调制谱谐波族特征蕴含的结构特性和应用于识别的相关问题。
This paper has analyzed the PN code acquisition performance effects of adaptive narrow-band interference suppression filters in spread-spectrum systems based on detailed theoretical derivation.
本文通过详细的理论推导，分析了扩频系统中自适应窄带干扰抑制滤波器对PN码捕获性能的影响；
Theoretical derivation indicates that time averaged three-order cumulant of signals, which are from(random) phase harmonic processes, is nonzero and its one-dimension slice is also a harmonic process.
理论推导表明，随机相位谐波过程时间平均三阶累积量为非零值，而且其一维切片仍然是谐波过程。
Through theoretical derivation and experimental verification, a new method is obtained for further reducing tooth curve error of oblique gear and for choosing feed gear wheel.
在应用无差动法滚切斜齿圆柱齿轮的基础上，通过理论推导和实验验证，得出进一步减少斜齿轮齿向误差的可行的挂轮选配新方法。
Based on both shear force and stream power and through theoretical derivation, the incipient motion critical conditions of cohesionless uniform sediment are achieved.
通过理论推导，得出基于剪切力和水流功率的均匀沙起动临界条件表达式。
This found that if the reverse idea of the electron charge-mass ratio as a known quantity, it can re-theoretical derivation, and thus obtain the value of the vacuum in the speed of light.
笔者发现，如果进行逆向构思，把电子的荷质比作为已知量时，可重新进行理论推导从而得到真空中的光速值。
In this paper, the flux of the transformer is obtained by theoretical derivation, then models of transformer and CT are built for simulation, and an experiment is done to prove the results.
该文首先对变压器磁链进行理论推导，然后建立变压器和CT模型进行仿真，并通过实验验证结果。
Based on geometric construction and theoretical derivation, the directions of the two kinds of optical axes in the biaxial crystal have been deduced.
用几何作图和理论推导方法，求得在双轴晶体中光轴与光线轴方向。
Through theoretical derivation, the stability conditions of the simulation model with different parameters were proposed.
通过理论推导，分析并得到了双稳系统数值仿真模型在不同参数取值下的稳定性条件。
A novel calibrating technique, frequency scanning calibration, was introduced and the theoretical derivation and the experiment were demonstrated.
提出了一种新的法布里-珀罗腔锁定模式标定方法——频率扫描法，并对该方法进行了理论推导和实验研究。
In this article, some results of the theoretical derivation and computational campaign performed to study the fluid instabilities in convergent geometry are presented.
本论文通过理论分析和数值模拟方法，对收缩几何中的一些流体不稳定性问题进行了研究。
The theoretical derivation shows that the vibro-rotary forging efficiency is directly proportional to the vibration frequency and feedrate and higher than that of longitudinal vibration forging.
通过本文的理论推导表明，扭转振动摆动辗压的效率与振动频率和进给速度成正比，扭转振动摆动辗压成形的成形效率比纵向振动摆动辗压成形的成形效率高。
"理论推导"（theoretical derivation）是一个在科学和工程领域广泛使用的术语，它指的是基于已知的、已被接受的理论、原理、定律或数学模型，通过逻辑推理和数学运算，系统地得出新的结论、公式、关系或预测的过程。其核心在于不依赖于直接的实验测量或经验数据，而是通过严密的逻辑链条从基本原理出发进行演绎。
以下是其详细含义的分解：
基础与起点：
过程与方法：
目标与结果：
与实验和经验的关系：
在工程中的价值（体现）：
总结来说，"理论推导"是一种从基本科学原理或数学公理出发，通过严格的逻辑推理和数学运算，得出特定结论或公式的理性研究方法。它是连接基础理论与具体应用、预测和解释现象、并体现工程学科专业深度与严谨性的核心过程。
来源参考：
"theoretical derivation" 是一个学术常用词组，由两部分构成：
theoretical（理论的）
指基于抽象概念、原理或假说的，而非实验或经验观察的。例如：物理学中的弦理论（）就属于理论框架。
derivation（推导）
指通过逻辑推理或数学运算从已知原理得出结论的过程。例如：牛顿从运动定律推导出万有引力公式（）。
组合含义：指基于已有理论体系，通过逻辑和数学方法逐步推演新结论的过程。常见于以下场景：
与实证研究的区别：理论推导依赖逻辑自洽性，而实证研究依赖实验数据验证（）。例如量子力学中的薛定谔方程先有理论推导，后期才被实验证实。
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