Compared with the classical bp algorithm, robust adaptive bp algorithm possesses some advantages as following : ( 1 ) increasing the accuracy of the network training by means of using both the relative and absolute residual to adjust the weight values ; ( 2 ) improve the robustness and the network convergence rate through combining with the robust statistic technique by way of judging the values of the samples " relative residual to establish the energy function so that can suppress the effect on network training because of the samples with high noise disturbances ; ( 3 ) prevent entrapping into the local minima area and obtain the global optimal result owing to setting the learning rate to be the function of the errors and the error gradients when network is trained. the learning rate of the weights update change with the error values of the network adaptively so that can easily get rid of the disadvantage of the classical bp algorithm that is liable to entrap into the local minima areas
與基本bp演算
法相比,本文提出的魯棒自適應bp演算
法具有以下優點: ( 1 )與魯棒統計技術相結合,通過訓練樣本相對偏差的大小,確定不同訓練樣本對能量函數的貢獻,來抑制含高噪聲干擾樣本對網路訓練的不良影響,從而增強訓練的魯棒性,提高網路訓練的收斂速度; ( 2 )採用相對偏差和絕對偏差兩種偏差形式對權值進行調整,提高了網路的訓練精度; ( 3 )在採用梯度下降演算
法對權值進行調整的基礎上,通過將學習速率設為訓練誤差及誤差梯度的特殊函數,使學習速率依賴于網路訓練時誤差瞬時的變化而自適應的改變,從而可以克服基本bp演算
法容易陷入局部極小區域的弊端,使訓練過程能夠很快的「跳出」局部極小區域而達到全局最優。
Up to date, all general protection locks sold on the market use asic or eeprom as the hardware design circuit. due to their simple design and easy - to - crack, they are easy to be cracked, and their circuit design s stability is very bad. thus, it does not only protect your product invalidly, but also damage your product s image and increase the cost of technical maintenance service
目前,一般市面上所銷售的保護鎖產品都是以asic或eeprom為硬體設計線路,由於其設計方
法簡單,破解的方
法容易,因此破解率極高同時該種線路設計之穩定性亦差,不僅無
法有效保護貴公司的產品,同時更可能使貴公司的產品形象受損,並且增加技術維修服務的費用。
There were, however, many other participants who expressed contrary views on the ground that, firstly, participation by people not of chinese nationality was permitted by the basic law, and secondly, hong kong was an international metropolis that needed to have individuals with global vision sitting on its legislature
然而,亦有許多聲音持相反意見,因為第一、這是《基本
法》
容許的;第二,香港是一個國際都會,需要一些有國際性視野的人士參與立
法會。
They show the supremacy of powerful nation in their reports for the lack of deep meditation of eastern countries ’ history and the objective study of the
這一點是東方國家無
法容忍的。無庸諱言,在冷戰前,我們國家的新聞觀與西方的新聞觀是針鋒相對的。
For a breath of difference between us is intolerable.
因為我們之間的任何微小芥蒂都是無
法容忍的。
It is sad that they got divorced but they had reached the end of the line together.
他們離婚令人難過,但雙方已達到無
法容忍的地步了。
The conditions from which she had fled were intolerable, past speaking of, past believing.
她逃離的那個環境令人無
法容忍,既不便說明又無
法相信。
The world community of nations cannot tolerate this kind of flagrant deception -
電視聯合國無法容忍這種惡劣的欺瞞,