金华市婺城区发展茶业循环经济的路径分析

本文阐述循环经济的理念在茶业生产中的应用。资源节约利用,产业持续发展和环境保护是区别传统茶业生产与循环农业模式的主要因素。金华市婺城区良好的气候条件、良种茶园的建设成果、茶叶生产加工机械化的普及改良和茶业标准化、组织化建设为发展茶业循环经济创造了有利的条件,但传统茶业生产根源的广泛性和循环经济意识的缺乏、及相应的支撑体系不完善也制约了茶业循环经济的发展。加大宣传,提高循环经济意识,加强循环茶业技术支撑和成熟模式的示范推广,完善保障体系,是推动茶业循环经济发展的重要途径。     

Analysis of workload of tank crew under the conditions of informatization

A consensus has been reached that the tanks need to be integrated into the informatization battlefield. With the development of technology, the tank crew has being gradually decreased, so the research on two-soldier crew tank has become a hotspot. The workload of tank crew under the conditions of informatization is analyzed based on the combat mission of tank and the typical combat scenarios, and the impact of new technologies on workload is evaluated. The crew members in tank can be reduced from three to two, but it is necessary to substantially improve the automation of target search and the reliability of each subsystem and component.     

民办高校开放性实验室网上预约管理系统的开发

高校实验室是人才培养的基地。民办高校实验室开放是提高办学水平,增加学生的动手能力,更能充分利用了实验室的资源,提高了民办高校实验室及仪器设备的利用率,为大学生创新能力的培养和教师科研水平的提高,提供了良好的环境;但传统的手工实验管理已很难满足现代实验教学的要求。为此,开发了一套开放性实验管理系统,旨在实现实验室资源、实验课程的有效管理以及提供预约实验的可能。应用数据库技术,设计并实现了一个基于Web的应用——开放性实验管理系统。     

Formation mechanism of periodic layered structure in Ni3Si/Zn system

The formation of periodic layered structure in Ni₃Si/Zn diffusion couples with Zn in vapor or liquid state was investigated by SEM-EDS, FESEM and XRD. The results show that the diffusion path in solid–liquid reaction is Ni₃Si/(T+γ)/γ/…T/γ/Ni₄Zn₁₂Si₃/γ/…Ni₄Zn₁₂Si₃/γ/Ni₄Zn₁₂Si₃/δ…/Ni₄Zn₁₂Si₃/δ/liquid-Zn, and the diffusion path in solid–vapor reaction is Ni₃Si/θ/(T+γ)/γ/…/T/γ/…T/γ/vapor-Zn. With increasing Zn diffusion flux, the diffusion reaction path moves toward the Zn-rich direction, and the distance from the Ni₃Si substrate to the periodic layer pair nearest to the interface decreases. In the initial stage of both reactions, γ phase nucleates and grows within T matrix phase at first, and then conjuncts together to form a band to reduce the surface energy. Based on the experimental results and diffusion kinetics analysis, the microstructure differences were compared and the formation mechanism of the periodic layered structure in Ni₃Si/Zn system was discussed.     

碳包覆铁酸镍锂纳米晶体的制备

以金属离子的柠檬酸盐为前驱体,通过溶胶-凝胶和水热法相结合的方法,制备碳包覆的铁酸镍锂(C-Li Ni0.5Fe2O4)晶体。采用DSC-TG、XRD、SEM等技术对其结构进行研究。结构表明,样品粒径均匀,无团聚现象。     

不同环境下烧结的Ca3Co4O9的热电性能

采用传统的固相反应法在不同的氧压下烧结制得Ca3Co4O9样品,并对其进行了结构和热电性能表征.经研究发现,在氧气环境下烧结样品可以抑制Ca3Co4O9在高温下分解,提高其烧结温度.在氧气环境中烧结的样品成相优于在空气中烧结的样品.一定氧压下烧结样品的电阻率比常压下烧结样品的电阻率大,但是Seebeck系数明显提高,因而改善了Ca3Co4O9的热电性能.     

高速公路沥青路面常见病害及处理方法

针对沉陷、坑槽、车辙、裂缝、桥面推移等高速公路沥青路面常见的几种病害进行分析,分别提出了相应的处理办法,以期有效处理各种路面病害,保障过往车辆的行车安全。     

特宽型缩幅定形机的研究与设计

设计的特宽型缩幅定形机用于涤纶及丙纶高密度织物的定形,为带式过滤机提供合格的工业过滤用布。过程主要包括特宽型缩幅定形机总体结构设计与各组成机构设计,具体介绍了特宽型缩幅定形机结构组成、工作原理,确定了机器相关性能参数。该机器剪切精度较高,提高了生产效率,安装方便,具有一定的应用和经济价值。     

谈建筑物沉降观测的方法和注意事项

阐述了沉降监测在点位布设、施工方法、数据整理过程中用到的典型方法,并对后期数据沉降量的计算所用时点差法和分析数据用的回归模型做了简单的阐述,以期指导实践。     

STRESS CONTROLLED FERROELECTRIC (BA0.5Sr0.5)TiO3 THIN FILMS PREPARED ON GD2O3/SRTiO3(001) BY A PULSED LASER DEPOSITION

ABSTRACT

Stress controlled epitaxial ferroelectric Ba_0.5Sr_0.5TiO₃ (BST) films have been deposited on Gd₂O₃/SrTiO₃ by pulsed laser deposition with oxygen background pressure of 200 mTorr at the deposition temperature of 750°C. In order to control the stress in BST films, oxygen pressures for Gd₂O₃ buffer layers have been varied from 0.1 to 100 mTorr, while that of BST films have been fixed at 200 mTorr. It has been found that the lattice parameters of the BST films deposited on Gd₂O₃ were changed. Furthermore, microwave properties of co-planar waveguide (CPW) fabricated on BST films were investigated by a HP 8510C vector network analyzer from 1–20 GHz. Large dielectric tunabilities were observed from the CPW's fabricated on BST films deposited on Gd₂O₃ layers deposited at low and high oxygen pressures, 0.1 and 100 mTorr, respectively.