查询词典 mixed differential parameter

With the development of modern society, differential equations is widely used in engineering astronavigation, economy, financial etc.

在力学、物理学、生态学、生物学、经济学等多种应用技术中往往用时滞微分方程比常微分方程来刻划更符合实际。国内外学者也对时滞泛函微分方程的基本理论及定性理论进行了卓有成效的研究。

Adopting Lorentz-invariant coupling model of neutron-antineutron and neutral meson strong interaction, we have physical analysis and accurate calculation on the neutron and antineutron to two neutral meson renormalization chain diagram propagator, and acquire the theoretical result; furthermore, after application of it to the physical process analysis and cross-section evaluation in this reaction , the differential cross-section of which is given. Moreover, through the comparison among this calculation and those scenarios: neutron-antineutron tree diagram and renormalization chain diagram propagator contribution, some important information about radiative correction was obtained.

采用中子-反中子与中性介子强相互作用的Lorentz不变耦合模型，对中子反中子重整化链图传播子作了有关物理分析及其严格解析计算，获得精确理论计算结果；进而将此结果用于中子反中子反应生成两个中性介子反应的物理过程分析及其截面的计算研究中，并精确计算出中子反中子重整化链图传播下中子反中子反应反应微分截面；最后还将此计算结果与中子反中子树图和重整化单圈链图传播下该反应微分截面作了对比分析，获得了有相关辐射修正的重要信息。

In the second method, the nonlinear tracking differentiator is applied to producing the differential signal of the pitch angle, which is used to calculate the pitch angular rate.

给出了两种重构方法，一种是通过建立等效的线性模型，设计线性状态观测器重构状态信号，另一种是使用非线性跟踪微分器方法，通过跟踪俯仰角的微分信号来计算俯仰速率信号。

This paper addresses the control problem of a variable speed wind turbine system in above rated wind speed which uses pitch angle control of the blades and delay angle control of the rectifier,with special emphasis on the differential geometric theory.

讨论了在额定风速以上时变转速风力机的控制问题，系统采用基于微分几何理论下的桨距角和触发角双输入控制。

This voltage is useful as a differential measurement of temperature from ambient and not as an absolute measurement of temperature.

这个电压是从周围环境的温度差测量，而不是作为一个有用的绝对温度的测量。

The main component dehydroabietic acid and little component abietic acid, neoabietic acid, levopimaric acid and pulustic acid of a few types disproportionated rosin were determinated quantitatively by selecting the proper order of derivative, differential wavelength difference, scanning rate and quantitative method.

通过选择合适的求导阶数、微分波长差、扫描速度和定量方法，对不同批号的歧化松香中的主成分脱氢枞酸和微量组分枞酸、新枞酸、左旋海松酸及长叶松酸进行了测定(其中左旋海松酸和长叶松酸测定的是合量)，实验结果令人满意。

By means of relevant methods and theorems in the qualitative theory of differential equations, traveling wave solution of a compound Burgers-Korteweg-de Vries equation is studied.

利用微分方程定性理论的相关方法和定理，对一类复合Burgers-Korteweg-de Vries方程进行研究，获得了方程行波解的存在性和唯一性，并给出了方程行波解的表达式，与此同时，研究了行波解的动力学行为和它们不同解的分岔。

Toscana irus meningo-encephalitis should be included in the differential diagnosis of holidaymakers with neurological symptoms returning from the Mediterranean.

托斯卡纳病毒脑膜脑炎的特定诊断包括从地中海地区回来的有神经学症状的旅游者。

Secondly, the governing differential equations of free vibration of non-uniform Timoshenko curved beams was derived.

第二，推导了变截面Timoshenko曲梁自由振动的微分控制方程。

By analysis of the beam element, the governing partial differential equations of transverse vibrations of Timoshenko beam are derived by Newton's second law for the three kinds of boundary conditions.

首先通过对梁微单元体的受力分析，利用牛顿第二定律导出Timoshenko梁横向振动的偏微分控制方程和三种约束边界条件。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48