查询词典 parabolic curve

Archimedes obtained the parabolic arch, spiral, circular area and volume as well as the ellipsoid, parabolic complex geometry and physical size.

阿基米德求得了抛物线弓形、螺线、圆形的面积和体积以及椭球体、抛物面体等复杂几何体的体积。

However, such issues as what effects will be produced by the "inverse parabolic type" landing technique on moving techniques in the entire supporting stage, how to smoothly connect sprint techniques on different racetracks, how to enhance the applicabil-ity of the "reverse parabolic type" technique on cinder and clay racetracks, and how to provide technical diagnosis and guidance for athletes at different levels according to their technical characteristics, figure conditions and com-mon technical characteristics of athletes at the same level, need to be further studied.

而"后扒式"着地技术对整个支撑阶段动作技术有何影响；如何衔接不同场地上的短跑技术、如何在煤渣跑道和泥土场地上提高"屈蹬式"短跑技术的适用性，以及如何根据运动员的技术特点、形态条件及同等水平运动员的共同技术特征，对不同等级运动员做技术诊断和指导等问题有待于进一步研究。

Based on the surjection of maximal monotone operators, we prove that some semilinear heat equations with weak Lipschitz nonlinear terms are exactly controllable by L〓 0, T: H〓(Ω control; Based on the critical point theorem of coercive convex functionals, we prove that some parabolic equations with Lipschitz nonlinear terms are globally approximately controllable and finite-dimensional exactly controllable by controls acting on mobile supports, and finally, we extend the results to parabolic equations in R〓.

首先利用极大单调算子的满射原理证明了半线性热方程在较弱Lipschitz条件下可通过L〓0.T；H〓(Ω控制实现精确能控。然后通过构造强制凸泛函并利用其临界点理论证明了带Lipschitz非线性项的抛物型方程可通过作用在在移动支集上的控制来实现整体近似能控与有限维精确能控，最后将整体近似能控与有限维精确能控结论推广到无界区域R〓上。

In this paper , we consider the Expanded Mixed Finite Element Method and mixed covolume method for the quasilinear parabolic integro-differential equation and quasilinear parabolic problem.

本文中我们采用扩展混合有限元方法和混合体积元方法数值模拟了二阶拟线性抛物型积分微分方程和二阶拟线性抛物问题。

Since the analytical solution was derived under the condition of an-infinitely wide slope, the shape of parabolic sections of general grassed channel needs to be considered. This work uses the results of Hey (1979) to build the shape factor, which can be used to design a grassed channel with a parabolic section.

但因其解假设条件为无限宽敞的渠道，而一般草沟设计则常用抛物线形断面，本研究用Hey(1979)找出修正形因子之系，可应用於设计草沟之水分析。

Introduction 引言 The problems that occur while illuminating shallow offset parabolas, in addition to those related to the efficient use of parabolic generally, are additionally aggravated by the specific geometry of the parabolic mirror itself.

这个问题时常存在于浅照射的偏馈抛物面天线上，除了和抛物面天线的效率有关之外，抛物线反射面本身的具体几何形状又使之更加严重。

Are set processing, production and sales of integrated enterprise, Main specifications of the dual-head models to stay plate Plum wrench, dual-purpose wrench (semi-parabolic / wide parabolic), active wrench (Zhanhua Plastic / Phosphating / calibration / chrome), a full range of instrument sets sleeve, the sleeve head, then a long shot, short take-under, ratchet wrenches, Freedom Next, slide the first handle rod afterburner, universal joint, the two sides bend Handle, Express±ú, large sliding head, curved handle, L-type wrenches, tire sleeve, saw blade, circular saw blades and other products, high-quality carbon steel and medium carbon steel.

山东世达机械工具有限公司是集加工，生产，销售为一体的综合性企业，主营各种规格型号的双头呆扳梅花扳手、两用扳手、活络扳手（沾塑/磷化/刻度/镀铬）、全系列套筒组套工具、套筒头、长接杆、短接杆、棘轮扳手，自由接、滑行头手柄、加力杆、万向接头、双方弯柄、快速摇柄、大滑行头、弯柄，L型扳手、轮胎套筒、锯条、圆锯片等一系列产品，产品选用优质中碳合金钢和中碳钢。

During the lateral parabolic profile was computed,numerical methods of calculating angle of inclination on initial point of the lateral paracurve and calculating angle of inclination based on interval length were analyzed.It is pointed out that the key of the lateral parabolic profile design is a circular function equation which can be applied to solving the angle of inclination on initial point of the lateral paracurve.

对侧位抛物线剖面设计求解过程中的求侧位抛物线初始点井斜角的数值方法和从段长求井斜角的数值方法进行了分析，指出其关键是求解侧位抛物线初始点井斜角所满足的一个三角函数方程。

This paper analyze the stability of soil-nail wall with limit balanced analytical method, and assume the slip surface, destroy surface as dual fold line, circular arc line, parabolic curve or log spiral curve etc.

本文采用极限平衡分析方法对土钉墙内部稳定性进行了分析，滑动面、破坏面的形状假定为双折线、圆弧线、抛物线或对数螺旋曲线进行了描述。

If the growing demand for land increased gradually drawn into a parabola, then with this showing a similar parabolic growth curve is another urban development curve.

如果日益增长的需求逐渐增加，引起土地成抛物线，然后显示与此类似抛物线生长曲线是另外一个城市发展的曲线。

Although translator has turned from being a crystal ball by which the original culture can unrestrainedly penetrate to another crystal ball by which the target culture can freely traverse, the translator's personal embodiment, in the process of cognitive act, are still absent in translation studies. Translators are still subjects without body or simply disembodied subjects.

译者虽然由原语文化可以自由穿透的玻璃球变成了译语文化可以自由穿越的玻璃球，但译者认知过程中的个体体验在翻译研究中依然缺席，译者依然仅仅是一个没有躯体体验的主体。

Chillingly, he claimed our technology is 'not nearly as sophisticated' as theirs and "had they been hostile", he warned 'we would be been gone by now'.

令人毛骨悚然的，他声称我们的技术是'并不那么复杂，像他们一样，和"如果他们敌意"，他警告说，'我们将现在已经过去了。