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能量路径
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  energy path
    In order to improve the energetics along the minimum energy path, single point calculation was carried out by using QCISD(T)theory.
    因此为了得到更可靠的反应势垒和反应热,我们进一步采用了当前较高级的单点能量校正方法QCISD(T)方法对最小能量路径进行修正。
短句来源
    This paper presents an ab initio direct dynamics study of thermal rate constants of the hydrogen abstraction reaction of CH2N+HONOCH2NH+NO2.Bhandhylp/6-31+g(d,p) methods were employed to optimize the geometries of all stationary points and to calculate the minimum energy path(MEP).
    用直接从头算动态学方法对CH2N+HONO→CH2NH+NO2反应进行了研究. 用BH&HLYP/6-31+G(d,p)方法对所有稳定结构和过渡态的几何结构进行了优化,并用内禀反应坐标方法计算了最小能量路径(MEP.)
短句来源
    The optimized geometries,frequencies and minimum energy path(MEP) is obtained at the BH&H-LYP/6-311G(2d,2p) level,and energetic information is further refined at the MC-QCISD(single-point) level.
    在BH&H-LYP/6-311G(2d,2p)水平下获得了优化几何构型、频率及最小能量路径(MEP),能量信息的进一步确认在MC-QCISD(单点)水平下完成.
短句来源
    As zero-temperature string method, the adaptive zero-temperature string method only requires the computation of the gradient of the potential, and makes any initial string converge to the minimal energy path and the error  be  or smaller.
    与零温度弦方法一样,自适应零温度弦方法只需要计算势能函数的一阶导数; 并且能够使得任一初始弦收敛到最小能量路径,而误差项小于或者更小。
短句来源
    The critical points on the minimal energy path, which often denote stable states or transition states, are concerned.
    最小能量路径上的临界点往往表示稳定状态或者转化状态,是人们所关心的。
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  “能量路径”译为未确定词的双语例句
    Study of the minimum-energy path-preserving topology control algorithm for wireless Ad Hoc networks
    无线Ad Hoc网络中保留最小能量路径的拓扑控制算法
短句来源
    By a filtering scale dissociation technique the link between the quasi-stationary planetary PNA and EAP teleconnection wavetrain and the rainfall and temperature abnormalities in the wet season is described, further revealing the energy propagating path with its mechanism of the meridional wavetrain prior to the advent of the rainy span.
    通过滤波尺度分离方法,清晰地描述出准定常行星波尺度的PNA、EAP型遥相关波列与华北汛期旱涝及其温度异常的相互联系,进一步揭示华北汛期旱涝前期遥相关经向波列的传播能量路径及其机制。
短句来源
    SA_MCP first uses a non-linear energy function to convert multiple QoS weights to a single metric and then seeks to find a feasible path by simulated annealing.
    将模拟退火引入多约束QoSR计算中,首先使用非线性能量函数将多个QoS度量转化成单一能量,然后基于模拟退火的方式求解最小能量路径.
短句来源
    We propose a distributed topology control algorithm for constructing a wireless network topology with the minimum-energy property,namely,it preserves a minimum-energy path between every pair of nodes.
    提出一个分布式的拓扑控制算法,通过改变节点的传输功率,该算法产生的无线网络拓扑结构具有最小能量特性,即它保留了网络中任意一对节点之间的最小能量路径.
短句来源
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  energy path
By adjusting the transmission power of each node, this algorithm constructs a wireless network topology with minimum-energy property, i.e., it preserves a minimum-energy path between every pair of nodes.
      
The LEPS potential energy surface is employed in the study, which is obtained from theab initio results and has an early saddle point in the minimum energy path.
      
The minimum-energy path for the reaction MTP + H2O → MDP + Pi is consistent with a two-stage dissociative process in the absence of Mg2+ and with a one-stage mechanism in the presence of Mg2+.
      
Global-local minimum transitions and the minimum energy path to dissociation of the dimer were also characterized.
      
The minimum energy path between the two lowest minima of the conformational energy surface consists of a pure inversion section and a section which is mostly rotation.
      
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The paper investigates the teleconnection pattern features of the monthly mean circulation abnormality in the period previous to the wet or dry season with abundant or little precipitation and the teleconnection relationship between the atmospheric circulation pattern and the subsequent dryness/ wetness and temperature anomaly in North Chinal results show that the rainfall quantity bears a close relation to the meridional wavetrain characteristics of the previous-period teleeonnection. By a filtering scale dissociation...

The paper investigates the teleconnection pattern features of the monthly mean circulation abnormality in the period previous to the wet or dry season with abundant or little precipitation and the teleconnection relationship between the atmospheric circulation pattern and the subsequent dryness/ wetness and temperature anomaly in North Chinal results show that the rainfall quantity bears a close relation to the meridional wavetrain characteristics of the previous-period teleeonnection. By a filtering scale dissociation technique the link between the quasi-stationary planetary PNA and EAP teleconnection wavetrain and the rainfall and temperature abnormalities in the wet season is described, further revealing the energy propagating path with its mechanism of the meridional wavetrain prior to the advent of the rainy span.

研究了华北汛期旱涝前期月平均环流异常的遥相关型结构特征,分析了华北地区汛期旱涝及其温度异常前期大气环流型的遥相关关系。结果表明,华北汛期旱涝现象与前期遥相关经向波列特征密切相关。通过滤波尺度分离方法,清晰地描述出准定常行星波尺度的PNA、EAP型遥相关波列与华北汛期旱涝及其温度异常的相互联系,进一步揭示华北汛期旱涝前期遥相关经向波列的传播能量路径及其机制。

As a challenging problem of the upcoming next-generation networks, multi-constrained quality-of- service routing (QoSR) is to find a feasible path that satisfies the multiple constraints simultaneously. For the NP complete problem, the heuristic SA_MCP by applying the simulated annealing to Dijkstra抯 algorithm is proposed. SA_MCP first uses a non-linear energy function to convert multiple QoS weights to a single metric and then seeks to find a feasible path by simulated annealing. This paper overviews the simulated...

As a challenging problem of the upcoming next-generation networks, multi-constrained quality-of- service routing (QoSR) is to find a feasible path that satisfies the multiple constraints simultaneously. For the NP complete problem, the heuristic SA_MCP by applying the simulated annealing to Dijkstra抯 algorithm is proposed. SA_MCP first uses a non-linear energy function to convert multiple QoS weights to a single metric and then seeks to find a feasible path by simulated annealing. This paper overviews the simulated annealing method and analyzes the issues when it is applied to QoSR. Extensive simulations show the following conclusions: (1) SA_MCP has a high performance w.r.t. routing success ratio. (2) It has a good scalability in both network scale and weight number k. (3) It is insensitive to the distribution of QoS constraints. Furthermore, when most QoS requests are feasible, the running time of SA_MCP is about O(k(m+nlogn)), which is k times that of the traditional Dijkstra抯 algorithm.

作为下一代互联网的核心问题之一,多约束的服务质量路由(QoSR)用来寻找一条同时满足多个约束条件的可行路径.然而,该问题具有NP完全的复杂度.将模拟退火引入多约束QoSR计算中,首先使用非线性能量函数将多个QoS度量转化成单一能量,然后基于模拟退火的方式求解最小能量路径.首先概述了模拟退火的方法,分析了在QoSR中应用模拟退火所面临的关键问题以及解决方案,然后给出了SA_MCP算法及其复杂性分析.实验结果表明,该算法具有很高的性能,同时对网络规模和约束个数都具有很好的扩展性,对QoS约束的分布状况也不敏感.此外,只要大部分QoS约束存在可行路径,算法的实际运行时间约为O(k(m+nlogn)),即传统Dijkstra算法的k倍(k为约束个数).

The cross sectional area of the coronary artery was computed using intra-vascular ultrasound (IVUS) video images. With this method, the search range for the inner arterial wall was firstly determined from the continuity of IVUS video frames. Then the internal and external energy was calculated to describe the smoothness of the arterial wall and the grayscale variation of ultrasound images respectively. Finally, the maximal energy path, which was the optimum contour of the arterial wall, was obtained using a...

The cross sectional area of the coronary artery was computed using intra-vascular ultrasound (IVUS) video images. With this method, the search range for the inner arterial wall was firstly determined from the continuity of IVUS video frames. Then the internal and external energy was calculated to describe the smoothness of the arterial wall and the grayscale variation of ultrasound images respectively. Finally, the maximal energy path, which was the optimum contour of the arterial wall, was obtained using a dynamic programming (DP) method. In this paper, a novel form of the external energy was proposed, which integrated the gradient and variant of the grayscale image. In comparison with the traditional external energy form which only counted the image gradient, the robustness and accuracy of this method were apparently improved in the measurement of the cross sectional area of the coronary artery.

利用冠状动脉内超声的视频图像 ,依据相邻帧的连续性自动确定血管内壁的搜索范围 ,结合表征血管内壁平滑性的内部能量和表征超声图像灰阶分布的外部能量 ,采用动态规划方法通过寻找最大能量路径来检测血管内壁的最优包络 ,并由此计算血管的截面积。现提出了一种综合图像灰阶梯度和象素方差的外部能量表示 ,使得冠状动脉截面积曲线的提取方法在鲁棒性、准确性方面较仅用灰阶梯度作为外部能量有了较大的提高。

 
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