几种新型食品保鲜技术的研究进展

针对传统食品保鲜技术存在的缺陷,对冰温贮藏、辐照贮藏、高压脉冲电场、超高压杀菌技术和纳米保鲜等新型的食品保鲜技术的特点及其研究进行总结,以期为新型食品保鲜技术研究发展提供参考。     

Ultimate Bearing Capacity of Concrete Two-way Composite Slabs with Precast Concrete Ribbed Panels

New types of precast concrete ribbed panels are developed in order to adapt to the complex loading conditions and different floor spans. Based on the yield line theory, equations for the ultimate bearing capacity and yield patterns of two-way composite slabs of different edge conditions and under uniformly distributed loading are developed, and the simplified formulas for the ultimate moment per unit width are proposed. The plastic limit analyses of two examples on the simple support and the fixed support are conducted, and the calculation results show good agreement with the experimental data.     

粉垄栽培木薯增产效果及理论探讨

为木薯等作物粉垄栽培提供依据,利用粉垄栽培技术种植木薯,与常规方法种植木薯相比较,探明2种栽培方法在根系、产量、品质等方面的区别。以‘华南205’、‘新选048’2个木薯品种为试验材料,在同一地点连续2年进行粉垄栽培和常规种植比较试验,在成熟期进行块根、产量、品质等调查测定。结果显示,木薯粉垄栽培比常规栽培单株结薯条数增加23.13%~39.10%,薯长增加6.94%~60.00%,薯径增加8.40%~13.91%,产量增加29.22%~63.78%;鲜薯淀粉含量增加3.23%~18.67%。表明粉垄栽培木薯可以提高产量,改善品质。并在此基础上进行以根系为主导的作物栽培的“根”本理论探讨。     

Multilevel Fuzzy Theory Evaluation of the Tourism Resources in the Three Gorges Reservoir

Complexity of mutual act and different sensation of different tourists are important factors influencing regional tourism resources evaluation. Fuzzy mathematic method can be used to up quantitative evaluation method on tourism resources evaluation. Taking Wushan Small Three Gorges as an example, the author carries out the evaluation of the tourism resources in the Three Gorges Reservoir. At the same time, the authors consider that five factors, such as improvement of the comunication of tourism resources, quickening the Steps of urbanization in reservior area, must be done well.     

Pinning Theory of Fermi Energy and Surface State Measurement of ZnSnO3 Gas Sensitive Material

In order to research the state of energy bands and gain and loss of electrons on the surface of ZnSnO_(3),it is put forward that Pinning theory of Fermi energy is applied to development of gas sensitive materials.The relative position between surface state and conduction band on surface of zinc tin complex oxide(ZnSnO_(3)) gas sensitive material has been investigated by utilizing oxidation redox couple,FeCl_(2)/ FeCl_(3),which have high surface state.Fermi energy is pinned at about 0.2 eV below conduction band E_(cs)on the surface of ZnSnO_(3).It has been determined that additives doping ratio,addition concentration and working atmosphere have no effect on this value.Therefore,pinning theory of Fermi energy has been verified by using this method.     

Incentive Mechanism for Team Cooperation Based on Implicit Side Contract

Aiming at the free-riding problem in team incentive, this paper designs a dynamic incentive mechanism based on implicit side contract with dynamic game theory by introducing the reasonable assumption that there is horizontal monitor in team production. The theoretic analysis indicates that the dynamic incentive mechanism, in which a strict group incentive compatibility contract is taken at the first stage and an individual incentive compatibility contract is taken at the second stage, can implement team cooperation uniquely in the general condition of risk aversion and stochastic production by only two stage repeated game.     

Vibration Analysis and System Simulation for a Stalled Wind Turbine

The aerodynamic characteristic of wind turbine is calculated by applying the Blade Element Momentum(BEM) theory.Also finite element mode analysis is done for the tower and the rotor.Then the multi-dynamic model of the wind turbine is built in Adams.Also the drive chain is calculated by applying state space method and programmed in Matlab/ Simulink.With that the combined simulation of vibration characteristics is carried out on the base of MATLAB/Simulink and ADAMS,in which the transmission effects and aero-elasticity coupling is fully considered.The results show that the method is able to simulate the vibration characteristic almost the same as software Bladed,which is well-known for analyzing performance and loads for the design and certification of wind turbines.     

农村土地流转的理论审视与现实路径解析

促进和规范农村土地流转是当前农村全面小康社会建设和新农村建设的重要内容之一。当前,应积极进行农村土地流转的理论分析,促进农村土地流转的法制化,完善政府的引导、管理和服务职能,积极建立和完善农村土地流转机制,建立健全农村社会保障体系。     

区域经济中博弈论在节水灌溉中的应用研究

当今水资源短缺，区域经济中节水具有重要意义，为了推广节水灌溉，有利于区域经济的发展，本文建立了督导推广节水灌溉博弈模型，从而得出有益的结论。