参数方程

On the basis of analyzing the forming mechanism of elliptical head profile spinning a locus equation for the spinning process has been worked out. Then, proposed in a relatively systematic way is a method for the determination of the following: the parameters of the involute profile form plate for the control of a boiler head spinning, and the...

文中分析了椭圆封头仿形旋压成形机理，建立了旋压轨迹方程，较系统地提出了控制封头旋压的渐开线仿形模板参数及旋压道次间距序列的确定方法，并成功地进行了工艺试验，为回转体的仿形旋压控制参数的确定提供参考。

Numerical simulation of water injection into coal seam throughlong drill hole and determination of its reasonable parameters

用有限元数值模拟方法求解了煤层注水二维、三维非定常渗流方程，用该数值计算模型结合具体实例，主要分析了工艺参数中注水压力、时间和钻孔间距与湿润范围的动态变化关系，给出了选取合理的注水工艺参数的计算公式。

In order to deter-mine the suspension point of double donkey headed oil suction pump and kinematics status and law of each component, this paper established corresponding analytic equation of kinematics and kinematics analysis, and carried Out calculation on the kinematics and kinetics law of the double donkey headed oil suction pump.

为了确定双驴头抽油机悬点和各构件的运动状态及运动规律，建立了相应的运动和动力分析的解析方程，并对双驴头抽油机的运动和动力规律进行了计算，由编制的相应计算机程序，确定出抽油机在一个周期内的运动参数与动力参数的变化规律，为合理选择电动机、设计机械换向及平衡重提供了理论依据。

In this dissertation, based on the beam propagation equation in the free-space, the hyperbolic-fit mothed is used to calculate the M2- factor of Gaussian beams passing through a spherically aberrated lens for the first time.

本论文根据自由空间中光束的传输方程，利用多点拟合的方法，通过数值计算，首次研究了激光束通过球差透镜后的M~2因子随球差的变化规律，并用M~2因子、桶中功率和K参数作为光束质量评价参数，讨论了透镜的像差、遮拦比等对激光光束质量的影响。

Based on the measurements on 770 cage-cultured large yellow croakers, the relations between fish body width, length and their weight have been analyzed by means of regression equation.

对770尾网箱养殖大黄鱼的生物学参数体宽、体长与体重进行测定，运用幂函数拟合方法获得体重与其他两个参数的关系方程。

The characteristics in design of components of tires, fundamental parameters and supplementary parameters for design of tire structure are analyzed. Then according to practical requirements and experience in design, general principles for tire design are put forward. The problems of disaccord of circle's radiuses in vertical and horizontal axis and the excessive errors in solving equations are solved. At last, with the work accomplished above, computer design of tire cross section may be achieved after completing those computer programs for the design.

论文首先分析了轮胎各部分的设计特点以及轮胎结构设计的基本参数和附加参数，根据实际要求和设计经验，提出了进行轮胎结构设计的总原则，解决了程序语言中圆的纵横比不统一和求解方程时误差太大的问题等，编制出了用于轮胎结构设计的子程序和总程序，实现了轮胎断面结构的计算机设计。

A set of fundamental equations that consist of four formulae and contain seven pitch parameters is established through the pitch cone geometrical relationship of a pair of hypoid gears.

通过准双曲面齿轮副的节锥几何关系，建立了包含7个节锥参数并由4个方程构成的节锥参数基本方程组。

The dissertation investigates the multilane-to-uniline problem in order to solve the theory problem and technique problem of feeding high speed palletizer with several production lines. The harmony equation of the problem is established with the method of movement tracing according to the thought of unit accumulation and free bumping of materials from different lines. For the random of unit materials forming, a strategy of key assignment is put forward to avoid the bump of materials from different lines.

为了解决采用多条供料线向高速码垛机供料以充分利用高速码垛机的处理能力的理论问题和技术问题，本文从一般的角度研究了多线合一问题，根据料股缓冲的思想和无供料干涉的原则，利用运动追踪的方法建立了多线合一问题的协调方程，由此建立了结构参数之间的相互制约关系，为结构参数的制定提供了理论依据，在随机供料的情况下，由于各线料股的形成具有随机性，为了避免各线之间的干涉，本文提出了一种钥匙分配策略很好地解决了这一问题。

The authors calculated the fragility parameters of the samples based on the time-temperature superposition principle of dynamic mechanical performance and the constants C1 and C2 of the WLF equation.

利用DMA研究了天然橡胶及其改性物的低温动态力学性能，测定了样品的动态力学性能参数，并应用动态力学性能的时温叠加原理，由WLF方程的常数C1和C2进一步计算出材料的脆性参数。

In the second part of the paper, the sport techniques of the flight elements was analysised in-depth theoretically by the movement technical structure:①the giant swing was first analysised in mechanics by applying the Kane's method, the dynamic equation of 5-link multi-body model was established, and the computer simulation software of the giant swing on the high bar was developed.

其次，作为单杠上飞行动作系统性研究的另一主要方面，本论文对飞行动作一般技术结构中的各技术环节进行了深入的理论分析：①着重对飞行动作准备阶段的回环运动技术进行了动力学分析，主要采用了多体力学理论中的Kane方法，建立了5环节人体回环运动的动力学方程，并应用计算机数值仿真技术研制开发了用于回环运动动力学分析的数值仿真软件，进而以动作实例对回环运动进行了数值仿真与误差分析，其所得到的数值仿真结果能够满足对人体回环运动的动力学分析和仿真要求；②对于飞行动作的撒手技术环节，本论文从人体环节相对运动角度，来分析撒手时人体质心的运动以及撒手时角动量参数，并列举了几种飞行动作撒手技术的基本力学指标；③关于飞行动作的空中技术，论文在总结了空翻转体动力学机理的研究成果基础上，对人体空中运动定量化问题进行了一般性描述，并进一步应用刚体动力学理论，着重建立起了描述空翻与转体技术之间定量化的关系，讨论了空翻转体运动的稳定性及其运动模式的转换问题，它对于定量地评定空翻转体技术以及今后对空翻转体动作进行数值仿真都具有理论上和实践上的重要意义；④关于飞行动作再握技术环节，本论文避免了以再握瞬时性的力学参数指标来描述再握技术特征的简单化途径，提出以再握下摆与回环下摆相对比的方法来研究再握技术，并以飞行动作再握技术的具体实例进行了对比分析，表明再握下摆技术相比回环下摆技术有着相当的困难性和复杂性，运动员对再握下摆过程中各环节的相对运动实施有效的控制，是连接高难动作以及顺利流畅地完成成套动作的关键。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。