Swap of Information between Two-End States in an Open Ferromagnetic Spin Chaint

The bidirectional transfer of information can be realized in an open Heisenberg ferromagnetic spin chain. The information is encoded in the probability distributions of the states at two end spins. The relative entropy is used to evaluate the effective transmission of the probability. The evolution of the relative entropy shows a periodical behavior. The period is increased with increasing the length of the chain and the magnetic field while it decreases with increasing the coupling strength.     

Theoretical Study on the Effects of Spatial Structure of P Complexation Sites on the Soil Phosphorus Activation in Leonardite Humic Acid Complexes

Humic acid is an important active component in soil environment. The spatial structures of P complexation sites in humic acid complexes play an important role in soil phosphorus activation and fertilizer efficiency. To explore the effects of spatial structure, the three different coordination modes of iron-carboxyl in models were calculated by the ONIOM method available in the Gaussian09 package. The(U)B3LYP hybrid density functional was employed to optimize the configuration for the QM region, and the UFF force field was used to calculate for the MM region. The results show that the different spatial structures influence the soil phosphorus activation by affecting the electronic structure, Gibbs free energy and interaction energy of the models. And the effects are as follows: the unidentate structure model ~6P-Fe-MHA-UD, the bidentate chelating structure model ~6P-Fe-MHA-BD>the bidentate bridging structure model ~5P-Fe-MHA-BD-BG. It can be known that, the fertilizer efficiency can be improved through increasing the proportion of the unidentate structure and the bidentate chelating structure in production engineering. The research provides a theoretical basis for further optimization of the production of humic acid phosphate fertilizer.     

省属高校电子信息类专业校外实习基地建设探索

校外实习基地是高等学校培养电子信息类专业学生实践能力、创造能力和创新能力的重要场所,是使学生了解企业,走向社会的重要途径.本文从省属高校建设校外实习基地的积极意义出发,针对校外生产实习建设过程中所出现的问题,总结了校外实习基地的建设原则、建设模式、管理经验,加强了实习基地的师资队伍建设,构建了科学规范的管理运行机制,推行校企合作,对省属高校电子信息类专业培养具有实践创新能力技术人才的实验实践教学具有指导意义.     

(1-x)CaTiO3-xLaAlO3陶瓷的微波介电性能研究

通过传统的固相反应法制备了(1-x)CaTiO3-xLaAlO3陶瓷,系统地研究了LaAlO3含量的变化对陶瓷的晶体结构、微观结构和微波介电性能的影响.结果表明,LaAlO3含量的增加导致(1-x)CaTiO3-xLaAlO3陶瓷的晶格结构发生畸变,使得陶瓷的介电常数下降、Q·f值增加,并使其谐振频率温度系数向负值处发生偏移.LaAlO3的含量为x=0.33时,(1-x)CaTiO3-xLaAlO3陶瓷的烧结温度为1460℃,展示了良好的微波介电性能:εr=45.3、Q·f=36218 GHz、τf=-0.5 ppm/℃.     

脉动热管实验研究

建立了铜管脉动热管实验台,进行了实验研究.分析了在水冷的条件下,充液率、工质、倾斜角等因素对脉动热管传热性能的影响,结果发现,热阻随着充液率的增加而增大;选用蒸馏水、无水乙醇以及丙酮为工质时,在相同条件下,丙酮热阻最低;不同倾斜角的实验中垂直底加热时脉动热管热阻最低.     

两端铰支层合浅拱的非线性‘跳跃''稳定性

利用叶开源和刘人怀提出的修正迭代法 ,导出了两端铰支、对称正交铺层的浅拱在均布载荷作用下的三次近似特征关系式 ,进而分析了结构几何参数、铺层数等对于‘跳跃失稳’临界载荷的影响 ,并通过与‘动力失稳’临界载荷的比较 ,讨论了两个‘失稳’概念的区别。     

氮掺杂碳材料负载Pd纳米结构催化剂催化硝基芳烃与苄醇借氢还原偶联制备亚胺

亚胺化合物作为一类重要的有机合成中间体,在医药、染料以及精细化学品制备方面具有重要的应用价值.使用竹笋为生物质原料制备一种氮掺杂碳材料负载的Pd纳米结构催化剂,以醇为氢源和反应物,通过借氢还原策略实现硝基芳烃原位还原并偶联反应高效制备亚胺化合物.该催化剂相对于其他商业化的催化剂和载体具有明显的性能优势,催化体系具有良好...     

鱼粉近红外光谱模型传递应用研究

为探讨光栅型与傅里叶变换型近红外分析仪之间模型传递的应用效果,选取国产鱼粉为近红外光谱样本,DS2500F型近红外分析仪为源仪器,MPA型近红外分析仪为目标仪器,采用分段直接校正(PDS)方法实现近红外光谱传递。分别建立水分、粗蛋白质、粗脂肪、蛋氨酸和赖氨酸等组分的预测模型,通过交互验证决定系数(R2cv)、交互验证标准误差(RMSECV)、马氏距离(MD)、系统偏差(Bias)、预测均方根误差(RMSEP)和相对分析误差(RPD)等参数,多维度评估光谱传递后所建预测模型的效果。结果表明,DS2500F仪器的近红外光谱传递到MPA型仪器时,所建国产鱼粉的水分、粗蛋白质、粗脂肪、蛋氨酸、赖氨酸的预测模型与MPA型仪器原始预测模型各参数对比无显著差异,预测效果基本一致,说明国产鱼粉在DS2500F仪器上的近红外光谱通过传递可以替代MPA型仪器的原始光谱,间接实现了模型传递,且具有良好的适用性和共享性,可提高近红外预测模型的应用效率。