一阶

Theorem 3: the gradient of any point in the locus of foot point of the perpendicular line and the tangent line of the cylindrical spiral is , namely one-order tensor field.

定理3 由坐标原点至圆柱螺线的切线所引垂线的垂足轨迹上任一点的梯度为，即为一个一阶张量场。

Some experimental results are shown. According to the results, using tricorn bits assembled the SEOPYN to drill oil well, the ROP increases by 8%～77%, and the rates of the footage for trienrn bit increases by 6.7%～44.0%.

本文在稳态brush轮胎模型基础上，通过印迹前端蹼处胎冠一阶变形模型，建立了轮胎制动力－滑移率的动态模型，并根据转鼓试验台上的轮胎制动试验，验证了该模型的仿真效果。

The asympostic limits of the binomial formula are considered in chapter 3.And we proved the equation of option value of binomial and trinomial scheme satisfying is one order approximation.

第三章中证明了二项式定价模型和三项式模型的极限性质，并得到了它们都是B-S模型在时间上的一阶近似。

When total economic values like total expenditure and total investments are set as independent variables, instead of those uncalculated production elements, the production function will be more suitable and more applicable for the explanation of our economic world.

尤其是第一层次的生产函数，直接用总消费，总投资等经济总量作为自变量，推导出自动满足一阶齐次等条件的生产函数，代替难以计量的生产要素构造的生产函数，就使得函数的适用性更广，解释力更强。

This article is to achieve the muti-directional computing of real number models, based on multi-directional computation of Unit group models.

根据一阶有限群的多方向计算，实现实数域运算描述的数学模型的多方向计算是本文的目的。

It is found that both the total and differential cross sections increase with the increasing of screening interaction, and especially for energies below 10 keV/u, the cross sections are one to two magnitudes larger than those in the unscreened case.

研究发现，碰撞电离总截面随等离子屏蔽的增加而增大，特别是在10 keV/u以下的低能区电离截面有量级的增加。对随能量变化的一阶微分截面，在低能碰撞过程中，屏蔽作用增加，微分截面呈量级增加，高能碰撞微分截面呈倍数增加。

In this paper we've compared several predicate of first order operators, and proposed an improved algorithm which is based on the automatic double threshold value improvement algorithm based on the maximum inter-cluster distance and intra-cluster variance ratio.

在边缘检测算法的选择上，比较了几种常用的一阶微分算子的优劣，并在Canny算子的基础上提出了基于最大类间、类内距离比值的自动双阈值改进算法。

It also testifies the intermediate variate in the system is servo valve loading pressure; compensator is a first derivative element.

可以证明本系统的这种观测量是伺服阀的负载压力，而所谓补偿器是一个一阶微分环节，因而容易实现。

The results showed that both the break point on the Ia-c curve and the minimum of the derivative variation corresponding to the λa-c curve agreed very well with the critical micelle concentration of the surfactant in aqueous solution as measured by surface tension technique.

以对二甲氨基苯甲腈为探针，测定它在表面活性剂(C12TABr、SDS、C12E23、C12-3-12·2Br)水溶液中的第二重荧光强度和对应的特征波长对表面活性剂浓度曲线，由Ia-c 曲线的转折点或λa-c曲线对应的一阶导数极小点可以获得临界胶团浓度。

This paper puts forward an experimental model with the first-order response surface method and the design of experiments to study the impact of factors on dynamic performance of PEMFC. These factors include clamping pressure, fuel gas pressure and flux. The model is finally validated by volt-ampere experiments.

本文通过正交实验设计，利用一阶响应面法得到各因素对电池性能影响的实验模型，综合考虑了装配压力、燃料气体压力和流量对自增湿、自呼吸型PEMFC动态性能的影响，并结合伏-安特性实验进行了验证。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。