高光谱影像FLAASH大气校正模型参数影响与评价——以西藏山南为例

图像输出的正确性与否依靠对后期的处理有至关重要的作用,而大气校正模块中参数的正确性是对本文的数据的处理起着重要的作用,在本文中气溶胶模式、能见度、大气模式和水汽相关的参数都有着重要的作用。本文利用FLAASH模块进行大气校正能很好的提高图像的质量,大气校正模型输入参数的评价是一个重要的工作,也有重要的意义。     

建筑工程施工合同的特点及规范管理策略的研究

建筑工程施工合同明确的规定了发包人与承包人的权利与义务,是一种双务合同,在市场经济建设中具有至关重要的作用。本文总结了建筑工程施工合同的主要特点,并通过分析我国目前施工合同管理方面的具体问题,提出了加强建筑工程施工合同管理的具体策略。     

考虑自由时差的资源均衡优化

针对现有资源均衡模型中,只单纯以资源均衡为目标而忽略了机动时间损失带来风险的不足,提出了以资源均衡与自由时差和为目标的目标规划模型,使其更具有实用性,并用粒子群算法给予求解,最后通过实例证实了该模型与求解算法的有效性.     

Direct Urca processes involving hyperons in neutron star matter

The presence of the isovector scalar interaction in neutron star matter is considered by exchangingδmeson;we study the effects ofδmesons on the direct Urca processes involving hyperons.The calculation is based on the framework of the relativistic mean field theory.By our analysis,the hyperon direct Urca processes under beta equilibrium are open at lower densities due toδmesons,which create a larger energy gap between two baryons in the reactions.Theδmeson leads to an obvious enhancement of the neutrino emissivity for the hyperon direct Urca processes.In particular,the relativistic neutrino emissivity is found to be substantially larger than predicted in the nonrelativistic approach whetherδmesons appear in an neutron star or not.In our results,δmesons not only change the baryons properties,but also result in more rapid cooling rate of neutron stars by hyperon direct Urca processes.     

High-pressure storage of hydrogen fuel: ammonia borane and its related compounds

As a promising candidate material for hydrogen storage, ammonia borane（NH3BH3） has attracted significant interest in recent years due to its remarkably high hydrogen content. Subjecting this material to high pressure not only enables the formation of novel phases and compounds with exotic properties, but also improves our basic understanding of material’s behavior at different levels of atomic and molecular interactions. This review focuses on the perspective of high-pressure chemical hydrogen storage related to NH3BH3-based materials. Four main aspects are discussed： the structures and bonding of NH3BH3 over a wide pressure–temperature space, thermolysis of NH3BH3 at high pressure, the formation of a novel high-pressure H-rich compound as a result of storage of additional molecular H2 in NH3BH3, and the potential rehydrogenation of the thermally decomposed NH3BH3 under the extreme of pressure.     

飞秒激光对酮类分子的作用

由于飞秒激光具有超快的特点。所以它对酮类分子的作用具有与纳秒激光不同的过程。本文简要叙述激光的发展及其对酮类分子的作用。     

Stability of impulsive linear hybrid systems with time delay

<正> This paper investigates the stability of impulsive linear hybrid systems with time delay.And a number of delay-independent/delay-dependent stability criteria are obtained by using Lyapunovfunctions or Lyapunov functionals.Two examples are also presented to illustrate the effectiveness ofthe obtained results or to compare with the existing results.     

关于砌体裂缝的防治措施探析

随着住宅商品化的发展,房屋裂缝问题越来越引起人们的关注。因此如何防治砌体结构裂缝已是工程技术人员不可忽视的重要课题。本文对砌体结构裂缝的成因进行了分析,并提出了采取的具体防治措施。     

Kinetics of bainite-to-austenite transformation during continuous reheating in low carbon microalloyed steel

A dilatometer was used to study the kinetics of bainite-to-austenite transformation in low carbon microalloyed steel with the initial microstructure of bainite during the continuous reheating process. The bainite-to-austenite transformation was observed to take place in two steps at low heating rate. The first step is the dissolution of bainite, and the second one is the remaining bainite-to-austenite transformation controlled by a dissolution process. The calculation result of the kinetics of austenite formation shows that the two steps occur by diffusion at low heating rate. However, at high heating rate the bainite-to-austenite transformation occurs in a single step, and the process is mainly dominated by shear. The growth rate of austenite reaches the maximum at about 835℃ at different heating rates and the growth rate of austenite as a function of temperature increases with the increase in heating rate.