速度慢的

ID〓 is characterized by the fast speed of training and classifying, and it can be applied to large-scaled learning problems. But the selection criterion of attribute is the core of ID〓, and is now doubted. AQ〓 is a type of decision rule induction, presented by Michalski, a scientist of U. S.. It is characterized by high-precision classifying and capability of knowledge expression, and it can be applied to automatic knowledge acquisition in expert system. However, the inducing and matching speed of AQ〓 is slow.

其中决策树归纳以澳大利亚学者Quinlan的ID〓为代表，其特点是训练与分类速度都很快，适用于大规模的学习问题，但ID〓把注意力集中在属性的选择标准上，然而这种思想方法已开始受到人们的怀疑；决策规则归纳以美国学者Michalski的AQ〓为代表，其特点是分类精度高和知识表达能力强，适用于专家系统的知识自动获取，但归纳和匹配速度都慢。

The effectiveness of this method depends basically on two values,Гmin the search is faster for larger Гmin and the size of Pref (RE (the search is faster for less prefixes), where Гmin donate the shortest path from the initial state to a final state of the Nondeterministic Finite Automaton and Pref the prefixes of length Гmin for all the strings matching the regular expression. The size of Pref can be exponential in m and for multiple expressions matching the Pref will be much larger.

现有的正则表达式搜索算法性能较好的是多模式过滤类型的算法，此类算法严重依赖于两个因素，从NFA的初始状态到终止状态的最短路径Lmin和正则表达式所表达的语言的前缀集合Pref的大小，Lmin越长，搜索速度越快，Pref越大，搜索速度越慢。

The traditional algorithm of Volume Rendering is Ray-Casting, not a proper algorithm for the large 3-D seismic data, referring some improved method and considering the characteristic of seismic data, a new fast Ray-Casting algorithm of oriented image space and negative-view transform was brought forward. As a result, this algorithm excels the traditional obviously by speed with image quality in experiment.

体绘制的传统算法是光线投射法，由于地震数据量大而绘制速度太慢，本文在借鉴一些改进算法的基础上，结合地震数据的特点，提出了一种基于图像空间的逆视变换的加速光线投射算法，实验结果表明该算法在保证相同图像效果的同时，具有明显的速度优势。

The secret to this system lies in the analysis of the earthquake, which actually generate two waves,the first is a smaller primary wave that travels 7 km/s, the second wave, the one that can cause damage, moves slight slower, 4km/s .

这个系统的秘密就在于对于地震的剖析。地震由两种震波组成，第一种小一点的主要震波以每秒7公里的速度传播，而第二种，就是能造成破坏的那一种，以相对慢一些的每秒4公里的速度传播。

In this paper, the generator model of constant transient voltage and the invariableness impedance model was used, and the saliency of generator is included; through the analysis of the characteristic of the network equation calculation in the transient stability analysis, a new node ordering algorithm is proposed. Better initial value can accelerate the convergence rate of the networking equations, reduce the number of iterations, thus to cut down the amount of calculating time.

本文首先建立了适合于暂态稳定分析的简单模型，其中发电机采用E_q恒定模型，考虑了发电机的暂态凸极效应，负荷采用恒定阻抗模型；研究了电力系统的暂态稳定分析方法，指出目前数值积分暂态稳定计算方法中存在的不足，主要是网络方程的求解速度过慢；分析了暂态稳定计算中网络方程的特点，将稀疏技术应用于网络方程的求解，提出了一种新的节点编号方法——最小度最小有源节点道路集算法，减少了网络方程的计算量；在进行交替迭代求解时，将预测算法应用于每一积分步网络方程功角和电压的初值估计当中，应用自回归算法和广义延拓算法，期望给出一个更有效的电压和功角初值方案，来加快方程的收敛过程，减少方程迭代的次数，以提高计算速度。

Along with the password attack method unceasing renewal, the computation ability unceasing enhancement as well as to the operating speed request, the tradition disperses row algorithm MD5, SHA has demonstrated their shortcoming and the insufficiency day by day, and thestructure of hash function is mostly based on block cipher algorithm DES, but the HASH function security is established above the grouping function security, because the DES operand is very big, the operating speed very slowly by and its itself some characteristics, therefore disperses a row function based on the DES algorithm to have potential unsecurity.

随着密码攻击手段的不断更新、计算能力的不断提高以及对运算速度的要求，传统的散列算法MD5，SHA已日益显示出它们的缺点和不足，并且过去hash函数的构造多是基于分组密码算法DES的，而hash函数的安全性是建立在分组函数的安全性之上的，由于DES运算量很大、运算速度很慢以及其本身的一些特性，因此基于DES算法的散列函数具有潜在的不安全性。

For example, alkaline elements can affect diffusion velocity of Zr, Si and O ions although these alkaline elements cannot exist in crystal structure of zircon. However, K rich media and Na rich media exert different effects on the growth of crystal form: in the K rich media, growth speed of prism faces in the vertical direction is much higher than that of pyramid faces, and {111} growth speed in the vertical direction is higher than {311},which decides the formation of bipyramids dominated by {311} pyramids; in the Na rich media, both prism and pyramid grow to a certain extent, but the former is smaller than the latter.{100} growth speed in the vertical direction is lower than {110}, while {111} growth velocity in the vertical diredtion is lower than that of {311},resulting in the growth of the crystal form characterized by {100} short prism and {111} pyramid.

例如，尽管碱性元素并不进入锆石晶格，但它们可以影响Zr、Si、O离子的扩散速度，但是富钾和富钠的介质对锆石晶形发育的影响是有差别的，表现为：在富钾的介质中，将导致柱面的法向生长速度较锥面快得多，而锥面中，｛111｝的法向生长又较｛311｝快，由此决定了形成以｛311｝锥为主的双锥状晶体；在富钠的介质中，柱面和锥面都有一定程度的发育，但前者弱于后者，而柱面中，｛100｝的法向生长较｛110｝慢，由此决定了形成以｛100｝柱和｛111｝锥为主的短柱锥状晶体。

By contrasted with silica gel, the corn hull desiccants by hydrolyzation method and heat treatment method have advantages as stabilization on moisture adsorption, less water of reversible adsorption and high moisture adsorption ratio in high humidity. These desiccants have disadvantages as lower moisture ratio than silica gel in low humidity and slower moisture adsorption speed than silica gel. The corn hull desiccant by derivation method has advantages as high moisture adsorption ratio, high moisture adsorption speed, stabilization on moisture adsorption and hardly any water of reversible adsorption.

通过与变色硅胶干燥剂的对比，通过水解法和热处理法得到的玉米渣皮干燥剂的优点是吸水稳定，可逆吸附水少，在高湿度下吸水率高，不足是在较低的湿度下，吸水率比变色硅胶干燥剂略低，吸水速度比硅胶慢；通过衍生方法得到的玉米渣皮干燥剂的优点是吸水率高，吸水速度快，吸湿稳定持久，几乎不含可逆吸附水，不足是再生后产品容易结块。

Null mutant Δmnh6 produced appeared offwhite hyphae, showed reduction in growth, conidiation and appressorium formation, and also showed reduction in appressorium turgor pressure. And the hyphae were more readily wettable by a solution containing SDS and EDTA and more easily digested by fungal cell-wall-digesting enzymes. The appressoria produced by Δmnh6 mutants showed diminished host penetration and the infectious hyphae of Δmnh6 mutants showed reduced in planta growth. Targeted deletion of mnh6 resulted in the greatly reduced virulence capacity to barley and rice CO39 in infection assays.

突变子Δmnh6的菌落形态不同于野生型GUY11，菌落呈灰白色，菌丝稀疏，生长速度变慢，产孢菌丝细胞壁的溶剂疏水性消失，菌丝细胞壁容易被细胞壁降解酶降解，产孢减少，孢子形态变得细长，孢子的附着胞形成率降低，附着胞的膨压降低，附着胞对寄主植物表面的穿透能力减弱，侵入后生长速度减慢，喷雾接种后对大麦和水稻CO39的致病性消失。mnh6基因重新引入Δmnh6后，突变子的表型恢复。

Corresponding to the long-lasting El Nio event, cyclonic anomalous circulation over the eastern North Pacific weakens slowly and anticyclonic anomalous circulation over the western North Pacific strengthens slowly at 850 hPa. Therefore the tropical Pacific westerly anomaly keeps long. The anomalous positive velocity potential over the western South Pacific at 200 hPa, which is related to the strong Australian winter monsoon, helps a long duration of El Nio. Corresponding to the short-lasting El Nio, the anomalous positive velocity potential over the western Pacific at 200 hPa moves eastward quickly and results in the vanishing of El Nio event.

还发现对于持续时间较长的El Nio事件，东北太平洋上850hPa异常气旋性环流减弱和西北太平洋上异常反气旋性环流增强较慢，因此赤道太平洋异常西风维持的时间也较长，而与澳大利亚冬季风加强相关联的南半球西太平洋的速度势正距平的维持，对El Nio的持续也起一定作用；对应持续时间较短的El Nio事件，西太平洋上200hPa速度势正距平的迅速东移，对El Nio的迅速消亡起重要作用。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。