俄语疑问型态式反应对语的结构语义描写

疑问句具有丰富的情态色彩,结合上下文语境可派生出不同的交际-语用功能。"почему"引导的原因疑问句充当态式反应对语,表达受话人对说话人态式的反驳。原因疑问句的这种反驳功能常处于一种固定的对话结构下,对其进行语义描写,可实现对话结构形式化,为态式反应对语模式化研究提供理论基础。

搅拌式浆态光催化反应器对偶氮染料X-3B的降解特性研究

构建了体积为5 L的搅拌式浆态光催化反应器,以偶氮染料活性艳红X-3B为目标污染物,进行光催化降解特性研究。结合对X-3B在小规模反应器中悬浮TiO2表面的吸附行为研究,考察了TiO2投加量、搅拌速率和曝气量等对光催化效果的影响,分析了光催化过程的降解动力学,并从传质的角度对搅拌强度和初始反应速率进行了关联。实验结果表明,在搅拌式浆态光催化反应器中,Langmuir模型和Freundlich模型均能较好地描述TiO2对X-3B的吸附行为;在催化剂最佳浓度0.5 g.L 1的条件下,初始反应速率r0随搅拌雷诺数Re的增加呈现先增大后稳定的趋势,进一步增加空气曝气量可以显著提高初始反应速率。根据相关理论推导得出在该反应器光催化降解X-3B时,氧的传质是影响初始反应速率r0的关键因素。

Dynamic Responses of Super Rice IIyou602 Plants to Different Nitrogen Levels and Configuration Modes

[Objective] The paper was to study the dynamic responses of super rice Ilyou602 plants to different nitrogen levels and configuration modes. [Method] With super rice Ilyou602 as test material, the dynamic changes of total N content in functional leaves, leaf sheaths and stems under different, application amount of nitrogen and configuration modes were analyzed. [Result] The highest total N content of functional leaves under different N levels appeared in the different periods, which was the highest during rehydration period in A3 level. The total N content in various plant positions during full heading stage and maturity stage showed fertilization treatments 〉 CK, functional leaves 〉 leaf sheaths 〉 stems. The total N content in different plant positions showed obvious difference in different treatments. When the super rice Ilyou602 was planted in Chengdu plain, the proper application level of N and configuration mode was as follows： 165 kg/hm2, fertilizer： topdressing = 6：4. [Conclusion] The study provided theoretical basis for nitrogen regulation of high yield cultivation of super hybrid rice.

Failure mode and dynamic response of a double-sided slope with high water content of soil

A double-sided slope with high water content in sandy clay was considered under the action of seismic load. Its failure mode and dynamic response were investigated using a hydraulic servo shaking table test. The typical characteristic of failure mode and dynamic responses of the double-sided slope were analyzed. Experimental results show that slope failure undergoes a process of progressive deformation. The slope failure mode can be explained as creep sliding landslide. AFA(Amplification Factor of Acceleration) at the surface and inner parts of the slope shows an increasing trend with the increase of relative elevation. The relationship between AFA and EAA(Excitation Amplitude of Acceleration) is nonlinear. An empirical formula is proposed to describe preferably the relationship between AFA,relative elevation and dimensionless EAA. The AFA at the middle and upper parts of the slope increases apparently with increasing EFA(Excitation Frequency of Acceleration).

Modeling and Simulation of Ethylene Polymerization in Industrial Slurry Reactor Series

A five-site comprehensive mathematical model was developed to simulate the steady-state behavior of industrial slurry polymerization of ethylene in multistage continuous stirred tank reactors. More specifically, the effects of various operating conditions (i.e., inflow rates of catalyst, hydrogen and comonomer) on the molecular structure and properties of polyethylene (i.e.,Mw,Mn, polydispersity index (IPD), melt index, density, etc.) are fully assessed. It is shown that the proposed comprehensive model is capable of simulating the steady-state operation of an industrial slurry stirred tank reactor series. It is demonstrated that changing the catalyst flow rate, changes simultaneously the mean residence-time in both reactors, which plays a significant role on the establishment of polyethylene architecture properties such as molecular mass and IPD. The melt index and density of polyethylene are mainly controlled by hydrogen and comonomer concentration, respectively.

Non-Isothermal Desolvation Kinetics of Erythromycin A Acetone Solvate

The desolvation of erythromycin acetone solvate was investigated under non-isothermal conditions by a thermogravimetric analyzer. This paper emphasized the kinetic analysis of non-isothermal TG-DTA data by Achar method and Coats-Redfern method to fit various solid-state reaction models, and to achieve kinetic parameters of desolvation. The mechanism of thermal desolvation was evaluated using the kinetic compensation effect. The results show that kinetics of desolvation of erythromycin acetone solvate was compatible with the mechanism of a two-dimensional diffusion controlled and was best expressed by Valensi equation. Corresponding to the integral method and the differential method, the activation energy of desolvation of erythromycin acetone solvate was estimated to be 51.26—57.11 kJ/mol, and the pre-exponential factor was 8.077×106 s-1—4.326×107 s-1, respectively.

Nonlocal Optical Spatial Soliton with a Non-parabolic Symmetry and Real-valued Convolution Response Kernel

Based on the picture of nonJinear and non-parabolic symmetry response, i.e., Δn2 （I） ≈ ρ（ao ＋ a1x - a2 x^2）, we propose a model for the transversal beam intensity distribution of the nonlocal spatial soliton. In this model, as a convolution response with non-parabolic symmetry, Δn2 （I）≈ρ（b0＋ b1f - b2 f^2 with b2/b1 〉 0 is assumed. Furthermore, instead of the wave function Ψ, the high-order nonlinear equation for the beam intensity distribution f has been derived and the bell-shaped soliton solution with the envelope form has been obtained. The results demonstrate that, since the existence of the terms of non-parabolic response, the nonlocal spatial soliton has the bistable state solution. If the frequency shift of wave number β satisfies 0 〈 4（β - ρbo/μ） 〈 3η0/8α, the bistable state soliton solution is stable against perturbation. It should be emphasized that the soliton solution arising from a parabolic-symmetry response kernel is trivial. The sufficient condition for the existence of bistable state soliton solution b2/b1〉 0 has been demonstrated.