实际训练

We deduce frondose algorithm of three layers BP neuralnetworks which is used in common, and discuss several important issues in designing neural networks which is used to forecast, for example, number of hidden layer, nerve cell number of hidden layer, epoch of learning, embryonic power value, decision of node number about input and outputo At the same time, this dissertation sums up things that conventional BP algorithm is improved on considering disadvantages of it.

推导了常用的三层BP神经网络具体算法，讨论了实际预测应用中神经网络设计方面的几个重要问题，如隐层数、隐层神经元数、训练次数、初始权值、输入节点数以及输出节点数的确定。同时，针对传统BP算法存在的各种各样的缺点，文中综述了对其改进的情况。

With the guide of non-linear program theory, by using interpolative steps and inexact line search, an improved conjugate gradient method was found, by which the training rate of BP networks increases by tens or hundreds of times. Moreover, the improved method is effective to solve non-linear equations for which Newton's method does not converge owing to the problems of the quadratic derivative and inverse matrix.

通过大量的数值模拟试验发现，在非线性规划理论的指导下采用间插步骤和不精确的一维搜索技术改进的共轭梯度法，是基于梯度和共轭方向的连续搜索算法中最有效的算法，这种算法使BP网络的训练速度提高几十到几百倍，使BP网络的实际应用效果大为改善；而且这种算法对于用牛顿法由于求二阶导数和求逆矩阵等问题难于收敛的非线性方程组的求解也是很有效的。

As Brian Randell and Peter Naur point out in the introduction to their edition of the proceedings,"The phrase 'software engineering' was deliberately chosen as being provocative, in implying the need for software manufacture to be on the types of theoretical foundations and practical disciplines that are traditional in the established branches of engineering."

如布莱恩 Randell 和彼得 Naur 点在外在对他们的进行版本的介绍方面，&片语'软件工程学'故意地当做气人被选择，在暗示对软件的需要方面制造当在理论上的基金会和实际的训练类型上那是传统的在工程学的确定部门中&。

This research has proved that an artificial neural network is capable to differentiate the reactional enhancement of malignant intracranial gliomas in postoperative MR images and the enhancement caused by tumor residual. As a innovative differentiation approach, it requires further studies and researches to determine its applicability in practice, including the increase of training samples, image description standardization, effects to doctoral diagnosis, as well as parameter optimization. With improvements in these elements, the performance of the network will be optimized.

本研究成功地证明了人工神经网络能够鉴别颅内恶性胶质瘤术后磁共振图像的反应性强化与肿瘤残存所致的强化，为解决二者的鉴别这一复杂问题提供了一个新的方法，但是本研究只是初步的应用探讨，能否在实际中应用，还有待于进一步的研究，如训练样本的增加、图像描述的规范化、对医师诊断影响程度、参数的优化等，网络的性能会不断完善和提高。

This research has proved that an artificial neural network is capable to differentiate the reactional enhancement of malignant intracranial gliomas in postoperative MR images and the enhancement caused by tumor residual. As a innovative differentiation approach, it requires further studies and researches to determine its applicability in practice, including the increase of training samples, image de脚本ion standardization, effects to doctoral diagnosis, as well as parameter optimization. With improvements in these elements, the performance of the network will be optimized.

本研究成功地证明了人工神经网络能够鉴别颅内恶性胶质瘤术后磁共振图像的反应性强化与肿瘤残存所致的强化，为解决二者的鉴别这一复杂问题提供了一个新的方法，但是本研究只是初步的应用探讨，能否在实际中应用，还有待于进一步的研究，如训练样本的增加、图像描述的规范化、对医师诊断影响程度、参数的优化等，网络的性能会不断完善和提高。

The resubstitution method was introduced to verify the stability of BDA model and the ratio of mistake-discrimination is lower after the BDA model was trained.

研究结果表明，经过训练后的Bayes判别分析模型误判率很低，判别准确率很高，可以在实际工程中应用。

Also fundamental methodology, experimental techniques of modern chemistry such as measuring and control techniques of temperature and pressure, vacuum techniques, flow techniques, photoelectronic and spectrographic analysis, test techniques for chemical engineering, etc. will be introduced in the lecture; In the second learning phase, 42 basic experiments are arranged, students are required to operate practically.

同时，还系统介绍现代化学的基本研究方法和实验技术，如温度和压力的测控技术、真空技术、流动法技术、光电分析和谱学技术、化工测试技术等；在第二教学阶段，安排42个基础实验，要求学生进行实际操作训练。

This is not correct, the dogs trained in KNPV can not and should not go directly into police service work.

其实并非如此。KNPV的训练犬只，并不能也不应该直接应用于警方的实际作业。

This is not correct, the dogs trained in KNPV can not and should not go directly into police service work.

KNPV的训练犬只，并不能也不应该直接应用于警方的实际作业。

There are still some working problems accruing in training practice.

而民警手枪射击训练在实际运用中还存在一些问题。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。