查询词典 mathematical constant

The work had been carried out can be summarized as follows: 1. Thermal cycle analysisBased on the classical thermodynamics, influence of isobaric reheat and isovolumetric reheat on cycle output is discussed. Based on the finite time thermodynamic theory, the thesis discusses the optimization of Rankine cycle, Brayton cycle and Stirling cycle between constant temperature heat source and constant temperature heat sink or between variable temperature heat source and constant temperature.

第一、循环优化分析：采用经典热力学研究了等压再热与等容再热对循环功的影响；采用有限时间热力学深入研究了恒温热源一恒温冷源和变温热源一恒温冷源液氮发动机朗肯循环、布雷顿循环和斯特林循环的优化和对比；着重研究了工质导热率与热机换热器总导热率之比对循环性能的影响、高温侧换热器导热率与低温侧换热器导热率之比对循环功率的影响等内容；得到了一些对循环和系统设计具有现实指导意义的结论。

We get some results about the scalar curvature of 2 and n(n≥3)dimensions Einstein manifold :ρ Maybe is constant and ρ is constant, the relation between Einstein Manifold and Riemannian Manifold with constant sectional curvature.

本文对其有关性质进行了讨论，得到了2维和n(n≥3)维爱因斯坦流形的数曲率的一些结果：ρ可能为常数和ρ为常数，以及爱因斯坦流形与常曲率黎曼流形之间的关系

More defects forming in the growth plate during deposition almost attribute to the lattice constant relaxation, which makes its lattice constant get larger. However, self-annealing of diamond thick films for long time in the process of deposition makes their lattice constant in their interior and nucleation plate approach its natural value.

化学气相沉积金刚石初期生长的晶体存在大量的空位等缺陷，晶格松弛，在金刚石膜持续生长过程中，形核面和膜内部在高温下发生长时间的自退火，缺陷浓度下降，晶格松弛现象消除，晶格常数变小并趋于理论值。

This paper discusses the calculation formula of outline for disc cam about roller follower of linear motion along the axis,it analyses the maximum angle of pressure and position for disc cam,from several ordinary motions of follower constant speed motion,constant acceleration and constant deceleration motion,simple harmonic motion and pendulum motion.

从从动件几种常用运动规律—等速运动、等加速等减速运动、简谐运动和摆线运动入手，讨论了对心直动滚子从动件盘形凸轮廓线长度的计算式，分析了盘形凸轮的最大压力角及其位置。

First of all, the paper carried out test study on four two-spanned model members of FSMRCWB, including three 1/2-scaled two-storeyed models and one 1/3-scaled three-storeyed model. The paper analyzed the test results, including analysis on mechanical property of the composite wall beam under vertical loads, and failure mode, deformation capacity, aseismic performance under horizontal loads and constant vertical loads. Secondly, the nonlinear property of concrete is studed and the nonlinear models of FSMRCSS is builded by ANSYS. Last, The paper studies the result of ANSYS, which mainly includes the loading-displace curve of FSMRCSS under horizontal loads and constant vertical loads, the mechanics of arch under vertical loads lonely and under horizontal loads and constant vertical loads respectively, and status of the distribution and changing of vertical stress and cross shear on the surface of the suporting beam, and the influence of span ratio and hole.All in all, the caculating results are in good agreement with the test results.

本文首先进行了三个1/2比例的两跨两层和一个1/3比例的两跨三层的框支密肋复合墙梁的模型试验，分析了框支密肋复合墙梁在竖向荷载作用下的受力性能，以及在竖向荷载与水平低周反复荷载共同作用下的受力性能、变形性能、滞回性能、耗能系数及破坏形态；其次，研究了混凝土的非线性特性，建立了框支密肋复合墙梁非线性有限元模型，并借助大型通用有限元软件ANSYS进行计算；再则，进行了非线性有限元结果分析，主要研究框支密肋复合墙梁在竖向荷载与水平地震力共同作用下的荷载位移曲线，分析在竖向荷载单独作用下和在竖向荷载与水平地震力共同作用下墙梁的拱作用，托梁顶面的竖向应力和横向剪应力分布及变化情况，并讨论跨度比、洞口对墙梁拱作用和托梁顶面的竖向应力的影响。

The applicability of this constitutive model is evaluated with the simulations of material tests conducted by Sasaki et al., includes (1)Uniaxially constant strain amplitude cyclic test,(2)Fast in tension/Slow in compression constant strain amplitude cyclic test,(3)Slow-fast-slow constant strain amplitude cyclic test,(4)Cyclic strain with tensile hold time test. Simulations based on this constitutive model have a good agreement with (1),(2) and (3), proofs that it can describe the cyclic stress-strain behavior of 60Sn/40Pb solder very well.

为验证本模式之能力，本文选择Sasaki等人之实验为对象，分别对60Sn/40Pb焊锡在(1)定应变振幅之循环单轴负荷实验、(2)拉伸快/压缩慢之定应变振幅循环负荷实验、(3)慢-快-慢之定应变振幅循环负荷实验、(4)拉伸应力保持之循环应变实验下的材料行为进行模拟，由(1)、(2)及(3)之结果证明本模式对60Sn/40Pb焊锡循环应力-应变整体行为具有理想的描述能力，并对循环塑性应变范围与应力范围之值有准确的预估。

The flowfield and performance of a centrifugal compressor was predicted and analysed, which was composed of a Krain's impeller and two types of vaneless diffuser specially: one was constant area vaneless diffuser and the other was the straight-wall. The results show that the efficiency of the straight-wall vaneless diffuser is obviously lower than that of the constant area, and a separate flow occurs nearby the exit of the centrifugal impeller with the straight-wall diffuser. However, the type of vaneless diffuser has little influence on the aerodynamics performance of the centrifugal impeller. Finally, it is suggested that the constant-area vaneless diffuser should be selected as the downstream extended area of the centrifugal impeller during the prediction for the centrifugal impeller.

对Krain叶轮后带等面积与直壁两种形式的无叶扩压器离心压缩机内部流场进行了计算与分析，结果表明：直壁型无叶扩压器离心压缩机的效率低于等面积无叶扩压器离心压缩机的效率；直壁型无叶扩压器使得叶轮出口的流动出现分离；扩压器的形式对离心叶轮的整体气动性能影响并不大；在进行离心叶轮数值研究时，叶轮后的延伸区最好采用等面积无叶扩压器，以尽量减小无叶扩压器所引起的计算误差。

Ring, including high pressure air, FRP acid pH blower, electromagnetic pump, auto-powder-bubble machine, sludge dewatering machine, coaxial vortex pumps, chemical liquid filters, coaxial self-suction pump acid pH, vertical centrifugal pipeline Pumps, water-dirt pumps, horizontal direct-pumped, Shen stainless steel water pump, Gear pumps, two high-speed pumps, automatic booster pumps, automatic pressure booster pump, building water supply submersible pumps , Multi-Purpose centrifugal pumps, computer frequency constant pressure pump, electronic constant pressure booster pumps, reciprocating washing machines, pressure-pumping interactive tied, tied for interactive frequency constant pressure pump, stainless steel deep-well pump, dust collection machines and dust collection Equipment, gas-casual, casual trachea, and many other environmental chemical equipment and sewage treatment works, such as the planning design and construction.

包括环形高压风机，FRP耐酸硷送风机，电磁气泵，自动型粉体泡药机，污泥脱水机，涡流式同轴抽水机，化学液体过滤器，同轴自吸式耐酸硷泵浦，立式管道离心泵，沉水式污物泵，卧式直接式泵浦，沉水不锈钢泵，齿式水泵，两段高速泵，自动增压泵，压差式自动增压泵，大楼给水潜水泵，多段式离心水泵，电脑变频恒压泵，电子恒压增压泵，往复式清洗机，压差式交互并列泵浦，变频恒压交互并列泵浦，不锈钢深井泵，集尘机及集尘设备，散气盘，散气管等各式环保化工设备及污水处理工程的规划设计施工等。

Ring, including high pressure air, FRP acid pH blower, electromagnetic pump, auto-powder-bubble machine, sludge dewatering machine, coaxial vortex pumps, chemical liquid filters, coaxial self-suction pump acid pH, vertical centrifugal pipeline Pumps, water-dirt pumps, horizontal direct-pumped, Shen stainless steel water pump, Gear pumps, two high-speed pumps, automatic booster pumps, automatic pressure booster pump, building water supply submersible pumps , Multi-Purpose centrifugal pump, computer frequency constant pressure pump, electronic constant pressure booster pumps, reciprocating washing machines, pressure-pumping interactive tied, tied for interactive frequency constant pressure pump, stainless steel deep-well pump, dust collection machines and dust collection Equipment, gas-casual, casual trachea, and many other environmental chemical equipment and sewage treatment works, such as the planning design and construction.

包括环形高压风机，FRP耐酸硷送风机，电磁气泵，自动型粉体泡药机，污泥脱水机，涡流式同轴抽水机，化学液体过滤器，同轴自吸式耐酸硷泵浦，立式管道离心泵，沉水式污物泵，卧式直接式泵浦，沉水不锈钢泵，齿式水泵，两段高速泵，自动增压泵，压差式自动增压泵，大楼给水潜水泵，多段式离心水泵，电脑变频恒压泵，电子恒压增压泵，往复式清洗机，压差式交互并列泵浦，变频恒压交互并列泵浦，不锈钢深井泵，集尘机及集尘设备，散气盘，散气管等各式环保化工设备及污水处理工程的规划设计施工等。

Including Ring high pressure air, FRP acid pH blower, electromagnetic pump, auto-powder-bubble machine, sludge dewatering machine, coaxial vortex pumps, chemical liquid filters, coaxial acid pH self-suction pump, centrifugal vertical pipe Pumps, water-dirt pumps, horizontal direct-pumped, Shen stainless steel water pump, Gear pumps, two high-speed pumps, automatic booster pumps, automatic pressure booster pump, building water supply submersible pumps , Multi-Purpose centrifugal pumps, computer frequency constant pressure pump, electronic constant pressure booster pumps, reciprocating washing machines, pressure-pumping interactive tied, tied for interactive frequency constant pressure pump, stainless steel deep-well pump, dust collection machines and dust collection Equipment, gas-casual, casual trachea, and many other environmental chemical equipment and sewage treatment works, such as the planning design and construction.

包括环形高压风机，FRP耐酸硷送风机，电磁气泵，自动型粉体泡药机，污泥脱水机，涡流式同轴抽水机，化学液体过滤器，同轴自吸式耐酸硷泵浦，立式管道离心泵，沉水式污物泵，卧式直接式泵浦，沉水不锈钢泵，齿式水泵，两段高速泵，自动增压泵，压差式自动增压泵，大楼给水潜水泵，多段式离心水泵，电脑变频恒压泵，电子恒压增压泵，往复式清洗机，压差式交互并列泵浦，变频恒压交互并列泵浦，不锈钢深井泵，集尘机及集尘设备，散气盘，散气管等各式环保化工设备及污水处理工程的规划设计施工等。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。