查询词典 gradient of scalar field

In the path integral formalism, we represent the generating functional and Green functions of Φ〓 theory by taking account of that the partial and the functional derivatives commute. Also we discuss the effective action for noncommutative scalar fields, and show how the noncommutative phase factors appear in path integral formalism. We realize that the two approaches (path integral and canonical quantizations) are completely equivalent each other.

在用路径积分方法对非对易标量场进行研究时，我们利用偏微商和泛函微商的可交换性，给出了Φ〓场格林函数和格林函数生成泛函的具体表达形式，得出了非对易相因子在路径积分方法中的具体表现形式，并对连通格林函数和有效作用量等问题做了讨论。

The complete description of molecular photodissociation requires the knowledge of the scalar and vector properties of the photofragments or parent molecule.

分子光解的完全描述需要了解光碎片或者母分子的标量和矢量性质。

We research the algorithm of scalar quantization which fits the human visual model, and present tree character plane coding and duplicate tree coding algorithm.

在量化方面，进行了结合人眼视觉特性的标量量化方法的研究，提出了小波图像压缩的树特征平面编码及其优化算法——二重树编码算法，取得了很好的压缩效果。

Simultaneously retrieval of atmospheric aerosol optical thickness and surface albedo over land by using polarized radiance as well as scalar radiance from POLDER measurement.

段民征。陆地上空大气气溶胶和地表反照率的同时反演--卫星标量辐射和偏振信息的联合利用。

The potential is a scalar function of position.

电势是位置的标量函数。

Some results preponderate over those of the scalar 9-7 tap wavelets.

整篇论文按如下方式进行组织。

In order to derive the 〓 interaction, wegeneralize the Fierz transformation from SU(N ≤ 4) scalar and pseudoscalar to SU tensor and point out that the 〓 interaction may beuseful in an extended quark potential model calculation.

为了理解在重子中存在着的自旋-轨道力的压抑，我们用微扰QCD的方法推导了四阶夸克-夸克之间的相互作用，并提出了用费曼图技术去计算非协变的含时微扰图的方法。

The second part is for the calculation of the mass spectrum for two-gluon glueballs by using Bethe-Salpeter equation. Our results are in good agreement with those given by lattice simulation and confirm that the lightest glueball is scalar with mass about 1. 7GeV, the mass of tensor glueball is about 2. 4GeV, the masses of pseudoscalar glueball and 2〓 not less than 2. 0GeV.

二是利用Bethe-Salpeter方程计算了双胶子胶球的质量谱，结果与最近的格点规范计算符合得很好，进一步肯定了标量胶球是最轻的胶球，质量约为1.7GeV；张量胶球的质量约为2.4GeV；而赝标胶球和胶球2〓的质量不小于2.0GeV。

The possibilityof searching for light neutral scalar or pseudoscalar Higgs particles fromsubthreshold neutral pion production experiments in nucleus--nucleuscollision is also investigated.

本文研究了在〓介子核一核碰撞中的阈下产生实验中寻找轻的中性标量或〓标Higgs粒子的可能性。

In the quarkonium-quarkoniumglueball mixing scheme, we quantitatively present the quarkonia-glueball content of the isoscalar scalar states and the isoscalar pseudoscalar states, and find that it is necessary to introduce additional glueball components in the ground isoscalar pseudoscalar mesons.

在介子—介子—胶球混合的框架下，我们定量地给出了同位旋为零的标量态和同位旋为零的赝标态的夸克-胶球内容，发现基态同位旋为零的赝标介子中有必要引入附加的赝标胶球成分，标量介子和标量胶球间存在强烈的混合。

Alternatively, the con- trollers can use the synchronous rectifier itself or loss- less inductor current-sensing methods to provide overload protection with lower power dissipation.

另外，康威特罗勒斯可以使用同步整流器本身或亏损减少电感电流检测方法，以提供低功耗过载保护。

Mr. Dauber's other Schatz hangs in his home movie studio.

多伯把沙兹的另一件作品挂在家里的电影室。