查询词典 forward difference

This choice incorrectly divided the difference between expected spot and forward by the forward rate rather than the spot rate.

这个选择正确划分预期之间的即期和远期的区别在远期汇率，而不是即期汇率。

The results show that the microstructure of ventra1 scale for python was composed of micro-convex and plank structure that was periodically arranged, it was mensurable and could be described by 9 characteristic parameters. Its surface was different in their forward and backward lean angle. The frictional coefficient of the ventra1 scale had closely relationship with moving direction, it decreased with the increasing load. The value of the frictional coefficient was about 0.07. The frictional coefficient while python moved backward and laterally were equal, and that was 33% more than that moved ahead. The frictional force of the ventra1 scale surface was caused by mechanical tooth function of micro-convex, acting intermolecular force and material's elastic hysteresis. The difference of forward and behind bevel for micro-convex was the anisotropy reason of frictional force.

结果表明：腹鳞表面的微观结构由指状微突体和板结构部分周期排列而成，其结构可用9个特征参数定量描述；腹鳞表面摩擦力由分子作用力、表面微突体的犁沟力、楔形作用力以及材料弹性滞后共同引起；腹鳞表面的摩擦系数在0.07左右并与运动方向有关，摩擦系数随载荷增加而减小；后向运动及左、右侧向运动时摩擦系数基本相等，比前向运动时高33%左右；腹鳞表面微突体不同方向上倾斜角度的差异是引起摩擦各向异性的主要原因。

One might argue that "as we go forward" is better than "going forward" but the difference is minimal.

也许有人会说，"随着我们go forward"比"going forward"要强，但这两种说法的差别微乎其微。

Furthermore, how to apply the model efficiently in practice is deeply discussed. As the variance produced by the forecasting model as concerned, the real-time revised method of hydrological forecasting is highlighted. Next arranged, the multi-stratum recursive prediction model is put forward to forecast the error series that is a dynamic system. Later, an error selfregressive multi-stratum recursive prediction model is set up as well as a current algorithm offered. Finally, the difference collated model and the gloss control method, which are devoted to updating the mid-long term hydrological forecasting during the meditate period, are put forward.

在综合评述中长期水文预报现有方法和模型的基础上，采用时间序列分析方法，建立中长期水文预报的时间序列组合模型，并对模型如何在实际中有效应用作了较为深入的探讨；针对模型预报所产生的误差，又重点研究了水文预报实时修正方法：提出了采用多层递阶预报方法对误差序列这一动态系统进行预报，建立了误差自回归多层递阶预报模型，并提出了较为通用的解算方法；给出了水文中长期预报中期修正的残差相关模型和总量控制方法。

In the chapter 5, we make our experiments in the process of Record libratory management system , one part of the whole zheJiang TV Statation MIS. We do requirement analysis and extract the business rule information, and then apply MIS-AD system to construct the Model Information Library. Meanwhile, we put forward that how to develop the program in client side. Finally, we compare our system with the traditional system and bring forward the difference between them.

本文第五章对浙江省电视台综合信息处理系统中磁带库管理子系统的业务流程进行需求分析，并抽取业务规则信息，使用MIS-AD系统建立它的模型信息库；同时指出在系统实际开发过程中，如何基于MIS-AD来开发客户端程序；最后我们对比了基于MIS-AD开发的系统和传统的MIS系统的之间的差异。

First the math theory of machining simulation is studied, and the set structure of NC machining simulation system whose components, including time, input, output and so on, are defined. Hereby we set up the hierarchy structure, the logical structure, the static model and the dynamic model of simulation system. The construction method of sweep entity of cutter and rotation parts is researched, and their differential geometry invariants are calculated. NC code is unscrambled, and the recursion division arithmetic of time segment is put forward, which is the driven data of the movement or rotation parts. The CLDATA should be interference-free. To examine if there is interference between cutter flank and the work piece, an arithmetic that discussed the existence of intersecting curve between them is put forward. To examine if there is interference between two turrets, an arithmetic that discussed the existence of intersection set between two polygons is put forward.

首先研究加工过程仿真的数学基础，然后定义数控加工仿真系统的集合结构及时间集、输入集、输出集等概念，建立加工仿真的层次结构和逻辑结构，阐述双刀车削仿真系统的静态模型和动态模型建立方法，分析刀具扫描体和旋转部件扫描体的建立方法及其微分几何性质；研究NC代码解读技术和双刀加工时间段递归子分划技术，为驱动各仿真单元作数据准备；通过讨论后刀面和工件表面交线的存在性判断刀具后刀面与工件间是否干涉，通过求多边形的交集判断刀架与刀架是否干涉。

When you think of Gerrard you think of someone who takes the ball forward and charges forward and I would agree so I think forward runs often, run with ball mixed, long shots mixed, try through balls often and cross ball mixed is what he's all about.

当你看到Gerrard的时候你会想到他可以带球前插并且但当前锋。当然我也是这样想的，让他经常前插，带球跑动设为混合，远射混合，多尝试传身后球，混和传中。

Through above study, the theoretical analysis of the inherent fault tolerance of feed-forward neural networks has been extended from hard-limit activation functions to differentiable activation functions; 2. By using above method, fault tolerance of discrete Hopfield feedback neural networks have been also analyzed. It means that the above method can be applied not only for feed-forward neural networks but also for feedback neural networks; 3. For the feed-forward neural network with the Sigmoid activation function, Chebyshev Inequality method was presented.

这项研究将以前仅限于对硬限幅作用函数前向神经网络固有容错性能的理论分析推广到具有可微作用函数的前向神经网络； 2 针对离散型Hopfield反馈神经网络，利用上面提出的方法，对其同样进行了容错性分析，得出许多有用的结论和计算公式，说明上面提出的方法不仅适用于前向神经网络，同时也适用于反馈神经网络； 3 针对具有Sigmoid作用函数的前向神经网络提出了一种切比雪夫不等式法。

In the test model, a new type joint connection of one-way hinge is put forward for achieving pure-hinge connection; In the shape forming test, because of the little post-tensioning forces, a new type loading method of twisting nut for drawing wire is put forward in stead of jack tensioning for solving the questions, such as super-tensioning and the nonuniform rate of loading; In the loadtest, a new type vertical loading system of multiple-point fixed pulley is put forward for solving the questions, such as more loading points and larger vertical force at one loading point.

试验模型中，为了实现纯铰接连接，提出了一种新型的单向铰节点连接形式；成形试验中，由于后张拉力较小，提出了一种新型拧螺母抽钢丝的加载方法，很好的解决了千斤顶易超张拉和加载速率不均匀等问题；承载力试验中，为了解决加载点较多、单点加载较大的问题，提出了一种新型多点定滑轮竖向加载系统。

In the test model, a new type joint connection of one-way hinge is put forward for achieving pure-hinge connection; In the shape forming test, because of the little post-tensioning forces, a new type loading method of twisting nut for drawing wire is put forward in stead of jack tensioning for solving the questions, such as super-tensioning and the nonuniform rate of loading; In the load test, a new type vertical loading system of multiple-point fixed pulley is put forward for solving the questions, such as more loading points and larger vertical force at one loading point.

试验模型中，为了实现纯铰接连接，提出了一种新型的单向铰节点连接形式；成形试验中，由于后张拉力较小，提出了一种新型拧螺母抽钢丝的加载方法，很好的解决了千斤顶易超张拉和加载速率不均匀等问题；承载力试验中，为了解决加载点较多、单点加载较大的问题，提出了一种新型多点定滑轮竖向加载系统。

Bob Eckert has been chairman and chief executive of Mattel for eight years.

美泰董事长兼首席执行官鲍勃·埃克尔特在任已8年。

The outlook for honors and disgraces carries on and surpasses the traditional outlook for honors and disgraces theoretically, and carries on and develops the theory of construction of socialist mora...

社会主义荣辱观的提出在理论上是对传统荣辱观的一次继承和超越，是对社会主义道德建设理论的继承和发展，在实践上有利于形成良好的社会风尚。