1) subaerial gravitational wavelength(λg(0))
地面引力波波长值(λg(0))
2) gravitational wave(λg(i))
引力波(λg(i))
3) cylindrical gravitational waves
柱面引力波
1.
Using the expression of energy-momentum pseudo-tensor of cylindrical gravitational waves of both the polarized states,the authors got the expression of the energy and momentum after a great lot of calculations.
利用Rosen-virbhadra(R-V)给出的引力场能量动量赝张量的一般表达式,计算得到了双极化态柱面引力波能量动量的具体形式,并讨论了其正定性问题与渐进行为。
2.
Under the framework of the Vierbein representation of the local Lorentz group gravitational gauge theory, the exact expressions of the energy momentum and the power flow density and total radiation power of the exact cylindrical gravitational waves of Einstein and Rosen are given in this paper.
在Vierbein 表述的局域Lorentz群引力规范理论框架下,给出了Ein-stein-Rosen 严格柱面引力波的能量动量、功率流密度和辐射总功率的严格表达式。
4) plane gravitational wave
平面引力波
5) surface wave
面波;地波
6) peak wavelength
峰值波长
1.
Meanwhile,we also conduct an experiment on the change of luminous intensity,luminous flux and peak wavelength with current and time.
同时,对大功率白色发光二极管法向光强、光通量和峰值波长随电流和时间的变化情况做了分析,说明PN结温度对于大功率发光二极管的发光具有较大的影响。
2.
Different shifts of peak wavelengths of blue and red LEDs were studied by measuring the two kinds of LEDs under DC and pulse currents,and it demonstrates that it is the heat and polarization effects that influence the shifts of peak wavelengths.
通过对蓝光和红光发光二极管在直流和脉冲电流两种情况下进行变电流测试,对其峰值波长的偏移情况进行了深入的对比分析和研究,指出主要是热效应和极化效应两个因素造成蓝光LED的峰值波长发生偏移,并计算出热效应单独引起峰值波长偏移的温度系数为0。
3.
Peak wavelength,bandwith,domain wavelength,and centroid wavelength are factors affecting on light color of LED.
影响发光二极管 (L ED)颜色的光谱参数有 :峰值波长、带宽、主波长和质心波长。
补充资料:引力波
引力波 gravitational wave 以波动形式和有限速度传播的引力场。按照广义相对论,加速运动的质量会产生引力波。引力波的主要性质是:它是横波,在远源处为平面波;有两个独立的偏振态;携带能量;在真空中以光速传播等。引力波携带能量,应可被探测到。但引力波的强度很弱,而且,物质对引力波的吸收效率极低,直接探测引力波极为困难。曾有人宣称在实验室里探测到了引力波,但未得公认。天文学家通过观测双星轨道参数的变化来间接验证引力波的存在 。J.H.泰勒等于1978年测出射电脉冲双星 PSR1913+16 的公转周期为 27906.98172 ±0.00005秒,周期变率为(-3.2±0.6)×10-12。而根据广义相对论,此双星体系因辐射引力波而损失能量,周期变率应为-2.6×10-12,与实测值在20%的误差范围内一致,从而间接地证实了引力波的存在。 |
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参考词条