Papers by Keyword: Compensation Effect

Abstract: Pot experiments were conducted under different status of soil moisture potential during different stages of rice. The results show that soil moisture potential regulation and control is able to increase the rice yield at each growth stages after returning green, the suitable soil water potential criteria for middle-season rice in Liaoning province at different stages is 5~10kPa in tillering initial stage, 35kPa at most in tillering final stage, 5~10kPa in jointing and heading stages, not more than 20kPa in Milk maturity stage; re-watering post drought has a compensation effect to rice whose soil suction potential is controlled in 5~10kPa at tillering initial stage according to the results that its tillers number, output, final root dry biomass and leaf dry weight were significant exceeding contrast; The research on rice quality indicates that water stress in jointing stage increase protein content but reduce eating quality.

Abstract: The effects of atmosphere turbulence on optical beams transmitting in space laser communication system were analyzed by using sixty-one units adaptive optical system in the paper. Laser communication systems from low earth orbit planet to ground station were imitated by way of optical design software. In addition, the compensating results, experimental phenomena and data based on adaptive optics were also analyzed.

Abstract: Fast steering mirrors（FSM） and deformable reflective mirrors (DRM) of adaptive optical systems (AOS) can significantly deduce laser transmitting attenuations caused by atmosphere turbulence in space laser communication systems. In this paper, Strehl ratio (SR) as an important compensating evaluation parameter was used and the compensating errors were also analyzed. The compensating effects of optical wavefront for atmosphere disturbance were put forward when the refractive index structure constants and transverse wind speeds were uniform distributions.

Abstract: Literature data on grain boundary properties show surprisingly in some cases reversed courses of the structural dependences than expected, or directly prove their qualitative changes with changing temperature. This “reversed anisotropy” is demonstrated for example of grain boundary segregation. It is shown that this reversed anisotropy of grain boundary properties can be explained by the enthalpy–entropy compensation effect. Serious consequences of altered structural dependence of grain boundary properties for Grain Boundary Engineering are discussed.

Abstract: The compensation effect, i.e. the linear dependence between characteristic enthalpy and entropy, has been frequently described in many fields of science and its close relationship to a phase transition is often assumed. In this paper it is shown for example of grain boundary segregation that the compensation effect principally differs from the phase transition although they can occasionally occur at the same temperature.

Abstract: Anisotropy of grain boundary motion in a Fe–6at.%Si alloy is represented by a spectrum of values of the activation enthalpy of migration and the pre-exponential factor, depending on the orientation of individual grain boundaries. The general plot of these values exhibits a pronounced linear interdependence called the compensation effect. It is shown that changes of these values, caused by changes of intensive variables, are thermodynamically consistent.

Abstract: Compensation has been reported for the relaxation parameters: the activation energy W and the pre-exponential factor τ0, determined from the Thermal Sampling of Thermally Stimulated Depolarization Current technique. Below the glass transition it is assumed that the relaxation time follows an Arrhenius equation. In the vicinity of glass transition temperature an experimental thermogram may be analyzed using the Vogel-Fulcher-Tamman-Hesse (VFTH) or the Williams- Landel -Ferry equation. In this article we use the VFTH relationship to study the compensation effect in the range of glass transition. For an elementary peak obtained by TS there is a relationship between the activation energy W, the temperature of the maximum current Tm, the VFTH temperature, the compensation temperature Tc and the compensation time τ c. We employ this relationship for a basic analysis of the compensation effect in the temperature range around Tg. By numerical simulations, and assuming parameters similar to those measured experimentally, we show that it is possible to observe a compensation point in some well defined conditions