A Model of the Universe that Can Explain Dark Matter, Dark Energy, and the Fourth Space Dimension

This paper explains how a model of the universe can be constructed by incorporating time and space into geometry in a unique way to produce a 4-space dimension/1-time dimension model. The model can then show how dark matter can be the gravity that is produced by real matter that exists throughout our entire universe. The model can also show how dark energy is not an increase in energy that is causing the accelerated expansion of the universe, but is an accelerating decrease in matter throughout the universe as the stars and galaxies in the universe continue to convert matter into energy during their life cycles. And then the model can show how a fourth space dimension must exist in our universe to locate a point in space.

基于均匀圆阵的信号二维方向角和多普勒频率的盲估计

针对均匀圆形阵列 ,在时空旋转因子的基础上 ,推导出四阶累积量矩阵 ,采用波达方向矩阵法 ,实现了信号的方位角、俯仰角和多普勒频率的同时估计。此估计算法利用所有阵元信息估计信号波达方向 ,提高了方向估计精度 ,解决了“频率兼并”问题 ,使有效应用范围扩大。利用了四阶累积量的盲高斯性 ,有效地抑制了高斯白或有色噪声的影响 。

对电子音乐声音空间化中“四维”技术的界定

音响空间的构建是电子音乐的创作和表演中比较关注的方面,许多电子音乐的创作者做出了大量的实践,在创作中普遍运用基于时间变化的声像、混响、延迟、多普勒效应等技术手段,达到突破三维的、立体的音乐音响的空间界限,使这些电子音乐具有更深维度层次的音响空间特征。根据爱因斯坦相对论的表述,三维的空间加上时间轴就构成了四维的时空。这些基于时间变化的技术手段可谓为"四维"电子音乐的第四维度。