查询词典 massless

The whole idea gained little attention in the 19th century, since light was thought to be a massless wave, not influenced by gravity.

整个想法在第19世纪自从光被认为是无质量的、不受引力影响以来得到很少的关注。

Neutrinos and the hypothetical gravitons, also massless particles, move at the same speed as light.

中微子和假想的引力子也是无质量粒子，它们也以与光相同的速度运动。

It says that under certain assumptions, composite massless spin-2 particle do not exist.

一起在80年左右在physics letters A上发表过一篇短文，说是为什么不可能存在高自旋的基本粒子，用的是反证法。

Adds a 'massless' force to the particle.

给粒子添加一个"无质量"的力。

In Quantum Gravity theory, gravity is produced by massless gravitons so that gravitons now represent individual packages of curved space that travel through space at the speed of light.

在量子引力论中，引力产生于无质量的引力子，只有这样才能解释引力子何以以独立的空间弯曲因子的形式在空间中以光速传播。

In effect, bodies are assumed rigid and treated as point massed; sprigs are massless and electrical leads resistanceless, suitable

在效果上，物体被假设为是刚体并且质量都集中在一点上，弹簧的质量可以忽略；导线的电阻为零；或者是可以得到合适的关系式使得系统的质量、电阻和温度的分布是均匀的。

We mean a two-particle system with the particles held at a fixed distance from each other by a rigid massless rod of length d.

我们意指一个两粒子体系，粒子之间借助于一长度为d的刚性无质量棒而保持固定距离。

In the seismic analysis of hydraulic engineering before, the traditional model of fixed boundary with massless foundation were often adapted, and the radiation damping of foundation and the inhomogeneity input of wave-motion could not be took into account.

以往大多数水利工程的抗震分析中，多采用传统的固定边界无质量地基模型，该模型未能考虑地基辐射阻尼的影响和地震波动的不均匀输入等问题。

The influence of the interaction on the mode shapes of the dam is also analyzed. Based on the above analyses, two modified models, which are massless damping foundation and part of mass foundation, are presented to simulate the dam--foundation interaction mechanism. A new method to form the non-proportional damping matrix is proposed.

在此基础上，为了更好地模拟坝—地基相互作用的机制，提出了两种改进的地基计算模型：无质量有阻尼地基模型和部分有质量地基模型，建立了形成体系非比例阻尼矩阵的方法，并用来分析了相互作用对重力坝的地震反应的影响。

Without mass the universe would be asea of particles zipping around at the speed of light (the natural condition ofany massless object).

如果没有物理质量的存在，整个宇宙会是一个由各种微粒组成的海洋，这些微粒会以光的速度四处飘散这是缺乏物理质量的物质所具的自然本性

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。