查询词典 mathematical formula

A theoretical formula for wave-pattern resistance, i. e., a statistical mathematical model, is developed using the linear wave-making theory. The effect of principal dimensions, vertical centers of transverse sections and the prismatic curve on wave-pattern resistance is studied.

本文用线性兴波理论建立了波形阻力的理论公式，从理论上考虑了主尺度和系数、横剖面形心高及棱形曲线对波阻的影响；根据17艘肥大船模65种状态的实测波形资料，用统计分析法计算得出一组随傅氏数而异的波形阻力预估公式；为使数学模型付诸电算，定义了属统计学范畴的"广义相关系数"。

The forming of flank of conical twist drill was studied and mathematical model of twist drill tine was founded in order to get formula of back clearance.

研究了锥面麻花钻后刀面的成型，建立了钻尖的数学模型，由此确定了后角的计算公式。

In this paper the viscous flows around a mathematical SWATH in full scale are simulated based on the computational fluid dynamics commercial software FLUENT. The numerical results of total pressure, wall shear stress and the corresponding viscous resistance coefficient at different velocity are obtained. The computational viscous resistance coefficients are compared with the estimated ones using empirical formula. The validity of the software to predict the three dimensional viscous flows and viscous resi...

利用计算流体力学商业软件 FLUENT对一实尺度小水线面双体船数学船型的粘性绕流进行了数值模拟，得到了不同航速下的船体表面总压力、表面剪切应力分布和相应的粘性阻力系数；将各航速下的粘性阻力计算结果和经验公式估算结果作了比较，验证了 FLUENT用于计算小水线面双体船三维粘性流和粘性阻力的有效性。

Based on observation data, the development process of the breach of landslide dams due to over topping may divided into 3 modes: vertical erosion, breadthwise extension and regression erosion of dam slope. A mathematical model describing the gradual failure process of the landslide dams is established based on the formula expressing the high intensity erosion obtained from experimental data, which can integrate the 3 modes of breach development process together. The validity of the model is verified by observation data.

根据一般滑坡堰塞坝特点和实际观测到的堰塞坝溃口发展规律建立了一个溃口扩展模式，并将溃口扩展过程归纳为溃口垂直下切、横向扩展和坝坡溯源冲刷3种主要表现形式，采用通过试验资料建立的高强度泥沙冲刷计算公式将这3种表现方式联系在一起，建立了堰塞坝逐渐溃决数学模型，并利用实测溃坝资料验证了模型的可靠性。

On the basis of the formula, the optimal mathematical model for the anti-wearing design of hypoid gears is set up.

在此基础上建立了准双曲面齿轮抗磨损设计的优化数学模型。

The mathematical modeling of ROBUST covariance fuctions and ROBUST collocation by combined various data is inde pendently proposed, and the corresponding formula are derived.

独立地提出和推导了求稳健协方差函数和多种数据稳健配置的数学模型和公式。

To meet the urgent need of this technology in China,in the article three mathematical models of commonly used for artificial wetlands( First-order kinetic model ,Monod kinetic model and Ergun formula) were discussed and the relations between the changes of expression were deduced in detail.

讨论了人工湿地3种常用的数学模型(一级动力学模型、Monod动力学模型和Ergun公式)，并对表达式之间的转换关系作了较为详细的推导；同时对其各自的优缺点作了分析。

According to the internal relations among the parameters of the standard triangular helixes, the iteration formula of the intensity calculation of the connection of draw- in bolt s is obtained with mathematical statistics.

根据标准三角形螺纹各参数之间的内在联系，应用数理统计方法，得出受拉螺栓联接强度计算的简单选代公式，它既可用於螺栓的设计计算又可用於校核计算之用

Teacher, Shen mentioned formula replicability reasoning using mathematical methods, often with red, yellow and blue chalk in turn show the hands of this teacher, Shen, colored chalk, such as beating of the notes, images, vivid, so that we are both relaxed and learn together happy; Shen teacher also used chalk powder into the suspension liquid foam, and emulsion, the solution can be compared; to chalk on the throw, drop to indicate what is the role of inertial motion and gravity; is to compare chalk down chalk placed on the desktop Pressure Size ......

沈老师讲到公式的举一反三，在用数学方法进行推理时，往往用红、黄、蓝粉笔依次展示，沈老师手中这彩色粉笔如跳动的音符，形象、生动，使我们学起来感到既轻松又愉快；沈老师还用粉笔灰泡成悬浊液，与乳浊液、溶液进行比较；将粉笔上抛、下落来说明什么是惯性运动和重力作用；正倒放置粉笔来比较粉笔对桌面压强的大小……总之，每一节每一课，沈老师的粉笔都有妙用。

Others are said to have redundant, but many also been a time when life is not to touch the East West gourd dipper touch, follow the crowd, and even Zhi Shen, away from reality, the choice of a road, only the prospect of dazzling, this is not a mathematical problem, Is not a chemical formula, but rather a philosophy of the proposition that this proposition, we have to read it out of it, and grasp the opportunity to grasp its own life big sail, to do my own life drivers.

其他说来也都是多余的，但众多人生又何曾不是东碰葫芦西碰瓢，随波逐流，甚至于沉乿，从实际出走，选择一条道路，才有光彩夺目的前景，这不是一个数学问题，更不是一个化学公式，而是一道哲学的命题，这一命题，我们要读懂它，摆脱它，把握机遇把握自己大人生船帆，做我自己的生命的驾驶者。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。