查询词典 parallel parking

Then a new method named parallel recomputing based fault tolerant parallel algorithm is proposed. The authors present the design of PRBFTPA for matrix LU decomposition, and evaluate them by experiments on a cluster system and compare them with the method of checkpointing.

针对许多计算密集型任务中的矩阵LU分解设计了相应的基于并行复算的容错并行算法，并对设计的矩阵LU分解的容错并行算法的性能进行了评估并与checkpointing方法进行了对比。

The main academic productions of this thesis are:(1) the parallel algorithms of computing permanents and permanental polynomials of sparse matrices are designed and implemented;(2) an efficient balancing straggles of parallel load is proposed using the theory of scheduling;(3) valuable data for the research of the molecule structure of fullerenes are obtained;(4) the multi-dimensional stable marriage model and its numerical methods give a new path to solve the clustering problems.

本文的主要学术贡献是：(1)设计并实现了稀疏矩阵积和式与积和多项式的并行算法；(2)利用排序理论给出了有效的负载平衡策略；(3)为富勒烯分子结构的研究提供了有价值的数据支持；(4)多维稳定婚姻模型及计算方法，为聚类问题的求解提供了新途径。

In order to improve the performance of parallel ant colony algorithms, an adaptive parallel ant colony algorithm with the information exchange based on super vertexes of a certain characteristic is proposed.

通过分析影响并行蚁群算法性能的诸多因素，以提高算法效率减少通信量为主旨，提出了1种基于超顶点交流策略的并行蚁群算法。

On the basement of conventional direct fan-beam reconstruction, this paper gives a newly improved algorithm-"fast filtering-backprojection". This method utilizes the symmetrical circle geometry to sample projection data, and reconstructs image on the Polarcoordinate firstly, then translates this reconstructed image onto the cartesian coordinate system with two interpolating operations so that the computer can show the result image on the VGA screen. This algorithm rebates the calculating backprojection greatly, and shortens a few times of reconstructing time than same kinds of means. With the size of image enlarging, the reconstructing time abates with 2 exponent times. In addition, according to the idea of parallel-beam, we rearrange the fan-beams and reconstruct image using parallel-beam method fastly. The rearranging constraint condition is given here.

本文首先在传统的扇束直接重建方法的基础上，提出了一个改进的快速滤波反投影重建算法，它利用旋转采集投影数据的圆周对称的几何关系，先在极坐标系统内进行图象的重建，然后通过两次内插运算再将图象转换到计算机显示方式下的笛卡尔坐标系中去，该方法将以往的直接重建方法中的反投影时所需的运算大大降低，并将重建时间比同类方法缩短了几倍，而且随着重建图象的尺寸的增大，重建时间以2的指数次方倍相对缩短，并获得了较好质量的重建图象；另外，又根据平行束投影重建图象的思想，对扇形射束进行了重排，然后利用平行束重建图象的方法进行扇束的重建，并推导了&扇束重排重建图象&方法的约束条件。

Nowadays,performance analysis and profiling for parallel programs are quite critical with the development of large scale parallel computing,and performance data collecting is the basis of this job.

目前，随着大规模并行计算的高速发展，并行程序性能分析与建模的地位日益重要，而并行程序性能数据的采集是进行性能分析的基础。

In large scale parallel computing systems,a high-performance scalable MPI implementation is crucial for parallel applications in order to exploit the massive parallelism in these systems effectively.

在大规模并行计算系统中，为了更有效地利用系统的并行性，实现一个高性能、可扩展的MPI系统是非常重要的。

The wave velocity ratio vertical to the stratum of the rock samples is usually less than that in parallel direction, and the relative increment of wave velocity ratio between the vertical direction and the parallel direction decreases as the wave velocity ratio in vertical direction gradually increases.

波速比的各向异性特征主要表现为垂直层理方向上的波速比普遍小于平行层理方向，且两方向波速比的相对增量还随着垂直层理方向上的波速比的增大而逐步减小。

We focus on resolving the following problems in FTP, that is how to guarantee the measurement accuracy of FTP when the connect line between the exit pupil of the projecting lens and that of the entrance pupil of the imaging lens is not parallel to the reference, or the two pupils are not coplanar, or neither the connect line parallel to the reference nor the two pupils coplanar.

推导出了适用范围更广泛的变形条纹描述公式和相位计算方法以及相位—高度映射算法。对于传统的傅里叶变换轮廓术测量系统而言，由于要求投影仪出瞳与摄像机入瞳连线与参考面平行，而且要求投影仪光轴与摄像机光轴共面，所以它可以被看作是本文所提出系统结构在该种情况下的一种特例。

The results show that the methane drainage quantity from the bores perpendicular to face cleat was 1.2 times that of the bores parallel to face cleat in any time and the difference between them becomes more distinct with the drainage time increasing. In the research area, the bores perpendicular to the face cleat was 2.61 times that of the bores parallel to face cleat in maximum drainage quantity and 4.34 times that in drainage effect, and the reasonable time is about 300 days.

结果表明：垂直面割理方向钻孔的抽放量在任何时刻都明显高於平行面割理方向钻孔的抽放量，抽放时间越长，两方向抽放量之间差距越显著；研究区垂直面割理方向钻孔的极限抽放量是平行面割理方向钻孔的2.61倍，抽放率高出4.34倍，合理抽放时间在300d左右。

This paper analyzes the working characteristic of parallel running system and indicates the problems existing in non- parallel running pump or fan.

本文分析了并联运行系统的工作特性，指出了泵或风机非同步运行存在的问题；大功率应用领域采用偶合器调速是一类适宜的调节方式，在分析偶合器调节特性的基础上，给出了一种实用的同步调速控制方法。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。