查询词典 thermodynamics

This paper refers to the definition of ideal gas and proves the equation of state from the view of kinetic theory, thermodynamics and statistical physics.

摘要给出理想气体的严格定义，并从分子运动论、热力学和统计物理等方面给出理想气体状态方程不同的证明方法。

Using the prevalent relation of no converse thermodynamics of elastic-plastic medium and the Baider free energy,the mechanical actions of elastic-glutinous-plastic hole medium are researched under the effect of impactive static water.

利用弹塑性介质的不可逆热力学的普遍的关系，采用德拜形式的自由能对弹粘塑性孔隙介质在冲击静水作用下的力学行为进行了研究。

Based on the definition of technical work and the application of this term, this thesis discusses the inappropriateness of this definition and the misunderstanding caused by introducing this term into the engineering thermodynamics.

针对技术功定义式方面存在的不足及某些因引用技术功而带来的错误观点，论述了技术功这一概念的不合理性。

The test measurements at the roadbed of the Hua Shixia in the National Road 214 (Qinghai-Sichuan Highway), are also introduced to check and compare the distribution and development of the temperature and deformation fields by the numerical analysis, in order to reveal the inhesion mechanism of the thermodynamics in the freezing heaving and thawing of the frozen soil engineering.

本文试图从正冻土的热、质与水分迁移的根本机理上全面描述冻土体的冻胀融沉变形特性与规律，从而将冻土工程当前的以温度为基点的、经验化为主的设计原则与准则向以冻土变形与工程稳定为基点的、科学量化为主的设计理论与设计方法方向迈进一大步。

These kinds of complexes have steady thermodynamics property and abundant information of photochemistry and photophysics,which can bond with DNA by the mode of insert,static,chimb-face combine.In this paper,bipyridyl was selected as ligand.

金属吡啶配合物与DNA相互作用的研究一直是生物无机化学领域十分活跃的研究课题，此类配合物的热力学性质稳定，光化学和光物理信息丰富，能够以插入、静电和沟面结合三种方式与DNA作用。

The structure and thermodynamics of liquid Au and AuCu alloys have been simulated using molecular dynamics method based upon the EAM interatomic potential to reveal the influence of the mismatch in atomic size on the glass forming ability.

近年来，非晶合金由于有较好的延展性和抗腐蚀性，得到了广泛的应用犤1犦。Duwez犤2犦首次制成金属非晶，Inoue犤3-4犦将非晶的获得归纳为三条基本规律，这为选择合金元素提供了有益的指导。

Combining the experimental results and theoretical analysis, the following work has been accomplished.(1) Reasons of the decrease of interelectrode capacitance and the increase of discharge gap caused by the powder suspended in dielectric fluid are explained. And the mechanism that surface quality of workpiece improved by powder-mixed EDM is analyzed from this viewpoint.(2) The variation regularity of the percentage of silicon on the machined surface of workpiece has been summarized according to the experiment results when silicon powder was added into the working fluid. The entropy is introduced to explain the reasons for this variation regularity by thermodynamics.(3) The dimensional accuracy is greatly influenced by the overcut resulting from discharge gap and electrode wear in practice application. Empirical formulas for the overcut in EDM and powder-mixed EDM are established based on the experimental results using the ternary linear regressive method in this paper.(4) The influence of main factors on the machined surface characteristics has been evaluated based on the orthogonal experimental design method.

通过一系列普通电火花加工与混粉电火花加工的对比实验，运用工艺实验和理论分析相结合的方法，重点做了以下工作：(1)探讨了粉末颗粒导致极间电容减小、放电间隙增大的原因，并从这个角度解释了混粉电火花加工可以改善工件表面质量的机理；(2)以混合硅粉的电火花加工为例，实验得出峰值电流和脉冲宽度对加工表面层成分中硅元素含量的影响规律，并引入熵的概念从热力学的角度对硅元素含量变化的原因寻找了理论依据；(3)在实际加工中，由于粉末的加入使放电间隙变大，这使得混粉电火花加工的尺寸精度难以控制，本文利用三元线性回归的方法，在实验数据的基础上，建立了两种电火花加工过切量的计算公式；(4)将正交试验法应用于混粉电火花加工实验研究，并通过对实验指标极差的直观分析，得出各电参数对加工指标影响的敏感程度。

On the basis of the framework of internal variable quasi-thermodynamics, the relationship between viscosity theory and plasticity theory is studied.

在内变量准热力学的框架内分析黏性理论和塑性理论之间的关系。

On the basis of algebra invariant theory, the expression of Helmholtz's free energy for orthotropic material considering damage effect was derived. Then, the corresponding constitutive relationship and damage evolution equations were obtained, based on irreversible thermodynamics theory.

基于代数不变量理论，推导了具各向异性损伤的正交各向异性材料的Helmholtz自由能的表达式，同时应用不可逆热力学理论，建立了其损伤本构关系及损伤演化方程。

The answer to such irreversibility resides the Second Law of Thermodynamics which explained in this and the next lecture.

为什么一下降鸡蛋在地上，飞溅没有回升到你的手，即使没有法律禁止呢？

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。