参数变化

Based on the research, the effect of rock mechanics parameters on casing load in flowage formation is analyzed.

针对由于地层具有流变特性对套管载荷的影响以及由于泥岩浸水等因素造成的地层流变特性改变而对套损产生影响等问题，根据开尔文模型推导了流变地层中套管载荷和地层粘度的关系，从而反映了套管载荷随时间的变化，在此基础上分析了流变地层岩石力学参数对套管载荷的影响。

With mature wild M. officinalis plants as the materials, the diurnal variations of their chlorophyll fluorescence parameters and the photoresponse curve of chlorophyll fluorescence were determined by portable modulation chlorophyll fluorometer.

方法］以成熟的野生海枫藤植株为材料，利用便携式调制叶绿素荧光仪测定其叶绿素荧光参数的日变化和叶绿素荧光光响应曲线。

Both in healthy group and in the PAOD group, the PI decreased with A-V foot pump (p.01) and increased post-compression; however, it was significantly lower than that of baseline (p.01) within 60 seconds of impulse delivery.

利用CHISS统计软件，采用成组t检验，对比PAOD组和健康组在应用动静脉足泵治疗后各个血流动力学参数的变化情况。

In this research, we find that because of the changes of parameters and structure in GNSS, the error origins are very different of them in foretime.

在研究中发现，由于GNSS系统本身参数和结构改变，加上坐标变换的问题，使得误差来源发生变化，导致原有误差公式不再适用。

The result indicated that the absolute fractionation factor of the interested elements changed with the above parameters.

结果表明，各元素的绝对分馏因子随着上述参数的改变而变化。

For free oscillation of various nonlinear conservative systems, the analytical approximate periods and the corresponding periodic solutions were established and they are valid for small as well as large amplitude of oscillation.

提出了结构参数发生较大变化时，计算结构的静力响应，固有频率与固有振型的高效的、适用范围广的方法；对非线性保守系统的自由振动，建立了既适用于小振幅又适用于大振幅的近似解析解法。

From the chromatographic retention data it was possible to calculate the separation factors for the two solutes and to obtain values for thermodynamic parameters such as the Gibbs free energy ΔG(subscript s and the enthalpy ΔH(subscript s of adsorption of water and ethanol on the fuel ethanol special adsorbent.

由气相色谱的保留时间计算出水和乙醇的分离因子和吸附剂吸附水、乙醇的吉布斯自由能变化ΔG(下标 s、吸附焓变ΔH(下标 s等热力学参数。

On this basis, through the MATLAB software to map out the bode diagram of frequency characteristics of load stiffness, the relationship between the load changes frequency and the system stiffness was analyzed, the main parameters affecting the system stiffness were obtained.

在此基础上，通过MATLAB软件绘制出了负载刚度频率特性伯德图，并对负载变化频率与系统刚度的关系进行了分析，得出影响系统刚度的主要参数，为负荷传感型全液压转向系统的设计与改进提供理论依据。

Therefore, high efficiency can be achieved. The circuit parameters are decided according to the intrinsic impedance of the resonant tank. As the duty ratios of the active switches are fixed, the charging current should be programmed via tuning the circuit operation frequency and therefore the circuit impedance. The optimum operating point is sieved by the frequency response diagram to operate the charger at high efficiency.

至於并联负载电路参数的设计是以共振槽的特性阻抗为基准，调变切换频率并固定主动开关的责任周期，藉由频率的变化改变电路阻抗，以控制充电电流的大小，透过频率响应立体图，挑选适当的操作点，使共振式充电器运作於最佳状态，以获得高效率。

The paper analyses two kinds of new formulas on the equivalent friction coefficient of V-belt drive in the present mechanical design and finds out that one is reasonable but has certain error and the other is wrong.

对现行机械设计中关于V带传动当量摩擦系数的2种计算公式进行分析。认为其中一种公式是合理的，但存在一定的误差；而另一种公式却是错误的。通过推导V带欧拉公式，给出了计算V带传动当量摩擦系数的准确公式，并在公式中引入了一个新的参数——摩擦力方向角。在考虑皮带拉力变化既有径向滑动又有周向滑动的前提下，改进后的计算公式比现有公式更加完善

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐