光周期现象

Secondly, the discharge characteristics were investigated. As the RF power was switched on and the matching impedance suitably set, a pale-purple glow was initially generated near the wall. With increasing RF power, the pale glow evolved into bright white glow. Analysis of voltage and current wave forms suggested that both the voltage and current wave forms are predominately sinusoidal and discharge cycle was above 100 nanoseconds. Current-voltage curve showed that discharge current increase as voltage increase without any abrupt; The current-voltage phase angle suggested that the plasma evolved from being predominately capacitive to predominately resistive. Discharge mode was essential an abnormal glow discharge plasma.

其次对装置的放电特性进行了分析，从放电的现象看，随着放电功率的提高，放电颜色由开始的暗紫色过渡到亮白色；从电流-电压波形曲线图发现所有的放电电流和电压曲线都是正弦曲线，放电的周期达到上百个纳秒；从电流—电压曲线分析，电流随着电压的增长而增长，并没有发现任何的突变现象；从电压—电流相位角来看，随着电流的增大，相位角基本保持不变，整个电路表现出容性放电性质，但是电阻性成分已经很强，属于反常辉光放电区域。

Up to date,many detailed researches on photoperiodic control of flowering time have been clear-cut in long-day model plant Arabidopsis thaliana.

光周期诱导植物开花的现象在被子植物中广泛存在，目前对长日照的模式植物拟南芥的光周期控制开花时间的研究较为详尽，而近年来，许多研究表明不同的植物间光周期控制开花反应具有很大的保守性。

Based on the results, some points of view about the research of HPGMR and its significa tion in the research of photoperiod were preposed.

探索了与光周期反应过程有关的叶片特异蛋白的变化，对HP〓MR的研究及这一材料在光周期现象研究中的意义提出了一些看法。

Photoperiodism The response of an organism to changes in day length.

光周期现象：植物对于日照长度改变所引起的反应。

For experimental purposes, scientists originally assumed that photoperiodism worked through photosynthesis.

为了进行实验，科学家们最初曾经设想，光周期现象可能是通过光合作用实现的。

With this method, we had several important differences compared to the YDmodel. First, the ratio of daily increment of PDT and the deficit of both water and nitrogen was used to estimate the effect of environment. Second, a nonlinear function was adopted to describe vernalization and thermal effectiveness (instead of three-stage linear function). Third, sinusoidal function was used to describe photoperiod curve cluster for different cultivars.

本模型在YDmodel基础上的改进主要有3点：（1）将每日生理发育时间的增量乘以水肥丰缺因子，改为除以水肥丰缺因子表现水肥对大麦发育的影响，客观体现了大麦在水肥丰缺条件下的发育延迟或提早现象；（2）将三段线性函数改为非线性函数表达春化效应和相对热效应，确立了不同品种相对春化效应和相对热效应的曲线族；（3）将线性函数改为正弦函数表达不同品种光周期效应。

The theory of accretion disks are important for many astrophysical phenomena, including Quasars, active galatic nucleic, X-ray binary stars, and young stellar objects. The most important branch of accretion djsk theory is the stability properties of djsks. It is widely considered that the luminosity variations of various astronomical objects are associated with the instability of accretion disk. The viscosity plays an important role in the accretion disk theory, and magnetic field exists commonly in astronomical phenomena. A more realistic analysis of the stabihty of the accretion disk should include both the radjal and azimuthal perturbations because of the strong shear of viscous flow.In this paper, according to the luminosity Variations of Various astronomical objects, we study the radial-azimuthal instability of an isothermal with magnetic field. We find that the radial and azimuthal fields B〓,B〓 are mainly responsible for enhancing the instability of the magneto-acoustic modes and non-axisymmetric modes,and that pulsational oscillations are larger in the radial than in the Z direction. The model may be useful in explaining the periodic light variation of FU orionis and. T Tauri stars.

在许多天体物理现象中，例如活动星系核，X-射线双星和年青的恒星理论中，吸积盘理论起着重要的作用，而吸积盘理论中的一个重要分支是吸积盘的不稳定性理论，普遍认为活动天体的周期，准周期光变现象与吸积盘的不稳定性有关，在吸积盘理论中，粘滞起着重要的作用，而磁场是天体物理中普遍存在的现象，对于几何薄吸积盘不稳定性分析，由于强剪切流的缘故，应该包括径向和环向扰动两个方面，本文结合天体物理中的各种周期，准周期光变现象，研究了含磁场的等温薄吸积盘的径向-环向振荡不稳定性，结果表明：磁场的径向和环向分量对磁声模和非轴对称模的不稳定性的增加起着主要的作用，且径向振荡大于轴向振荡，所得结果有利于解释FU Orionis和T Tauri Stars的周期光变现象。

Haze's impact is that hazed mask haze is still in use has not been caused by the timely detection of loss of product yield as well as the mask to repair due to haze resulting product cycle delay.

在晶圆厂内Haze的产生是比较正常的现象，它对生产上的影响是haze 的光罩没有被及时发现仍在使用造成产品良率的损失以及光罩因haze 去送修造成产品生产周期的延迟。

Specimens were reared under different temperatures, photoperiods, and densities. Total weights of lacerates were used as an index of investment in asexual reproduction, whereas gonad weights as an index of investment in sexual reproduction.

为了解答这个疑惑，我们以美丽海葵（Aiptasia pulchella Carlgren 1943）为材料，以不同的环境变因：温度、光周期、海葵个体密度为处理，并以碎裂片数目、大小及湿重代表无性生殖的反应与投资，以生殖腺湿重代表有性生殖的投资，探讨海葵的有、无性生殖投资之间是否有补偿作用的现象。

Maintenance in both natural and short photoperiods during the restoration phase, pikas showed significantly increased the gonadal masses than the field collection group in the early ten days of Feburary (P.01). While maintenance in the upper two photoperiods during in the sexually quiescent phase, pikas didn't show signigficently increased in gonadal masses than the field collection group in the last ten days of December.

在不同光制对鼠兔生殖内分泌功能影响的研究中，1月下旬捕获的鼠兔，在自然光（L/12 h）和短日照条件下饲养49天以后，性腺器官也呈现显著萌发并产生成熟配子的现象；而在9月中旬捕获的鼠兔，在上述光周期条件下饲养81天后，却呈现显著抑制性腺功能的作用。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了