查询词典 hidden line algorithm

The algorithm needn't generate candidate itemsets and scan database, because it employs FP-Tree to store trasanctions in database compressedly and takes full advantage of the characteristic of FP-Tree.Consequently,the complexity of space and time the algorithm used is reduced obviously in the procedure of data mining.In a thorough experimental analysis of our algorithm on real and synthetic data,we isolate the effect of the individual components of the algorithm. Our performance numbers show that MFP-Miner outperforms previous work.

该算法利用频繁模式树来压缩存储数据库中的事务，并充分利用频繁模式树的特点，在挖掘最大频繁项目集的过程中不需要产生候选项目集和扫描数据库，从而减少了算法在挖掘过程中使用的存储空间和计算时间，通过实验结果显示，该算法的性能优于同类算法。

Design random number generators with good independence and good uniformity is the key in reliability parallel simulation. Four algorithms of parallel random number generators are introduced. They are segmented parallel algorithm and leapfrog parallel algorithm of multiplicative congruential generator and generalized feedback shift register generator, parallel algorithm of lagged Fibonacci generator, and parallel algorithm of combined generator.

可靠性并行仿真的关键问题是设计独立性、均匀性良好的并行伪随机数序列，本文给出了基于分段并行算法和跳跃式并行算法的乘同余发生器、GFSR发生器和延迟Fibonacci发生器、组合发生器等的并行算法，组合发生器能够产生周期为2.3×10〓的伪随机数序列，且品质良好。

The entropy-directed algorithm needs manual intervention to construct fault isolation strategy,and it is ofεhigh computation complexity.Theoretical analysis and experimental results illustrate that the entropy indirected algorithm remedies such deficiency. The MFIT of the strategy by this algorithm is about 38% less than that by the entropy- directed algorithm under the assumption of unequal fault rate.

实验验证和理论分析表明，该方法弥补了直接熵法构造故障隔离策略时需进行人工干预、计算复杂性高的不足；在不等故障概率的假设条件下，平均故障隔离时间比直接熵法减少约38%。

This paper describes a new algorithm of image enhancement of impulse noise based on PCNN time matrix and rough sets indiscernibility relation. For noisy gray images, the results of computer simulations show that the image noise can be reduced efficiently and the image becomes clear and the target details of the image can be enhanced better by using this algorithm. In addition, the effects of this algorithm are better than usual image enhancement algorithm.

基于粗集理论中的不可分辨关系的等价概念及PCNN赋时矩阵，提出了一种含有脉冲噪声的图像增强算法，计算机仿真结果表明，对被噪声污染的灰度图像，用基于PCNN与粗集理论相结合的图像增强算法处理后，图像噪声得到有效抑制，画面更清晰，图像中目标的细节也得到了很好的增强，其结果优于常规方法。

Hypercube has many advantages, such as smaller diameter, simple routing algorithm, many parallel paths between any two nodes, and fault-tolerance, on the other hand that the Hypercube nodal degree increased logarithmetically to the number of nodes has limited network population. So we propose a constant nodal degree hierarchical topology to remedy the weakness of Hypercube and take advantages of Hypercube most. Given the definition of FCCN we analyse the basic properties including nodal degree , number of links , extensibility and diameter (maximum network communication delay). Also we proposed a simple and self-routing algorithm applied in FCCN. Although the self-routing algorithm is not optimal, but at more than 82% case it can get the shortest path, and the percent is larger and larger increased with network levels. By the self-routing algorithm the internodal distance is calculated to evaluate the network communication delay more clearly. The average internal distance is in order of the cubic root of the network population that is almost same as logarithmetically relation in a few thousands. FCCN is a highly scalable network due to its recursive construction.

首先在比较了基本互连网络的基础上，看到超立体网络的杰出性能，包括网络直径小、寻路算法简单且为自寻路算法、容错能力好等等，但是由于其节点度随网络的规模的增加而按对数关系增长，使得超立体网络的应用规模受到极大限制，所以为了能最大限度利用超立体网络的优点的同时弥补其节点度方面的不足，作者提出了节点度等于常数4的FCCN网络结构，来最多地利用立方体网络的优点；然后在对FCCN网络进行严格的定义后，分析了网络的节点度、链路数、延伸特性、网络的直径（决定网络的最大通讯延迟）等，并提出了适于FCCN网络的简单的自寻路算法，计算自寻路算法可得到最短路径的比例，看到在多于82％以上的情况自寻路算法都是最优的，而且比例随网络层数的增加而增加；应用所提出的自寻路算法计算了可以更加准确反映网络通讯延迟的参数—网络平均节点距离，计算得到此参数与网络大小的立方根成正比，此比例关系在网络的规模在几千节点以内与对数关系的网络几乎一样；FCCN网络是一高度可扩展结构，这是因为FCCN的递归构成方式，使得网络在增加节点时其原有的拓扑结构可以保持不变，不需对网络进行重新设计，为网络的实用扩展提供了条件；理论分析得出FCCN网络是一种高度可扩展高性能网络的结论。

This paper analysised the current problem in traffic path chosen generally, presented the expression and storge structure in computer of traffic data, discussed and researched the traditional algorithm of current optimal path chosen, which contained Dijkstra Algorithm, Floyd Algorithm and A* Algorithm.

论文综合分析了当前道路交通中在路径选择方面存在的问题，介绍了道路交通数据的计算机表示方式与存储结构；讨论研究了当前路径选择的几种经典的算法，分别研究了Dijkstra算法、Floyd算法、A*算法。

The wavelet time-frequency properties of the uncracked rotor and the cracked rotor were discussed by the continuous wavelet time-frequency analysis algorithm. A new algorithm using the wavelet time-frequency analysis algorithm to detect the crack was proposed. The influence of the sampling frequency on the wavelet time-frequency analysis algorithm was analyzed through the numerical simulation research; the valid sampling frequency was presented.

利用连续小波时频分析方法，讨论了裂纹转子与无裂纹转子的小波时频特性，提出了利用小波时频分析方法识别裂纹的新方法；数值仿真研究了采样频率对小波时频分析方法的准确性和有效性的影响，并给出了建议性的采样频率。

After summarizing BSS algorithm of convolved mixture and its applications, the paper applies the improved PSO algorithm to convolved mixture BSS and proposes the PSO algorithm based on simulated annealing method. The paper also does some experiments of BSS based on PSO algorithm with grads acceleration and analyzes the simulation results.

4在总结卷积混合的盲源分离算法及其应用之后，将改进型粒子群算法应用到卷积混合的盲源分离中，给出了基于模拟退火思想的粒子群算法和基于带有梯度加速的粒子群算法的盲源分离的仿真实验，并对仿真结果作了分析。

By using simulated annealing algorithm to mitigate the stress of culling in genetic algorithm and utilizing the Boltzmann mechanism of simulated annealing algorithm to control the acceptance of the individuals generated by copulated and varied, a CDMA multi-user detection method based on genetic annealing algorithm is adopted. The computer simulative experiment is conducted.

考虑到模拟退火算法和遗传算法各自的优缺点，将两者有效的结合起来，通过模拟退火算法来减轻遗传算法的选择压力，利用模拟退火算法的Boltzmann机制来接收交叉和变异后的个体，并且结合CDMA通信系统多用户检测的特点，采用了遗传退火算法对CDMA通信系统的多用户进行检测的研究。

Firstly, the RFCM algorithm and Apriori algorithm were expounded. The production parameters were fuzzed by fuzzy clustering algorithm. Depending on Fuzzy_ClustApriori algorithm, the fuzzy association rules were studied and implemented in processing industry.

首先阐述了模糊聚类的RFCM算法和关联规则的Apriori算法的内容，分析了实现模糊关联规则的Fuzzy_ClustApriori算法流程，并用RFCM算法对实际数据进行分析，得到不同类别的模糊数。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。