优化提取与分离海兔大脑神经节蛋白质组

蓝斑背肛海兔（Notarcus Leachii cirrosus Stimpson，NLCS）属于海洋软体动物．NLCS大脑神经节（cerebral ganglion，CG）富含高丰度的脂类物质，并干扰了三氯醋酸-丙酮法沉淀CG蛋白质．本实验的目的是找到一种适合提取、分离海兔CG蛋白的方法．经各种实验方法对比后，发现超速离心法能有效分离CG破碎液中的脂类化合物，提高双向凝胶电泳法分离BG蛋白质组的分辨率，大约可检测到450个蛋白质点．     

新型低功耗320×288 IR ROIC 中列读出级的设计

介绍了320×288红外(IR)读出电路(ROIC)中列读出级的低功耗设计。采用新型的主从两级放大的列读出结构和输出总线分割技术相结合。其中主放大器完成电荷到电压的转换,从放大器完成对输出总线的驱动来满足一定的读出速度,总线分割是把320列分组来减少输出总线上的负载电容。通过spice的仿真可以发现,与传统的列读出级相比,这种新型结构的功耗由原来的47mW降到了现在的6.74mW,节省了80%以上的功耗。     

石人沟铁矿露天转地下开采南区房间矿柱稳定性

利用FLAC方法对石人沟铁矿露天转地下开采南区房间矿柱稳定性进行了研究,并对地下开采采场房间矿柱进行了优化,为安全高效的回采地下矿产资源提供了保证.     

Fabrication of MgB2 superconducting films by different methods

MgB₂ superconducting films have been successfully fabricated on single crystal MgO(111) and c-AL₂O₃ substrates by different methods. The film deposited by pulsed laser deposition is c-axis oriented with zero resistance transition temperature of 38.4 K, while the other two films fabricated by chemical vapor deposition and electrophoresis are c-axis textured with the zero resistance transition temperature of 38 K and 39 K, respectively. Magnetization hysteresis measurements yield critical current density J_c of 10⁷ A/cm² at 15 K in zero field for the thin film and of 10⁵ A/cm² for the thick film. For the thin film deposited by chemical vapor deposition, the microwave surface resistance at 10 K is found to be as low as 100 μΩ, which is comparable with that of a high-quality high-temperature superconducting thin film of YBCO.     

Phase-selection and metastable phase formation in highly undercooled eutectic Ni78.6Si21.4 alloys

A large undercooling (250 K) was achieved in eutectic Ni_78.6Si_21.4 melt by the combination of molten-glass denucleation and cyclic superheating. The metastable phase formation process in the bulk undercooled eutectic Ni_78.6Si_21.4 melts was investigated. With the increase of undercooling, different metastable phases form in eutectic Ni_78.6Si_21.4 melts and part of these metastable phases can be kept at room temperature through slow post-solidification. Under large undercooling, the metastable phases β₂-Ni₃Si, Ni₃₁Si₁₂ and Ni₃Si₂ were identified. Especially, the Ni₃Si₂ phase was obtained in eutectic Ni_78.6Si_21.4 alloy for the first time. Based on the principle of free energy minimum and transient nucleation theory, the solidification behavior of melts was analyzed with regard to the metastable phase formation when the melts were in highly undercooled state.     

Shenzhousia qilianshanensis gen. et sp. nov. (Protodonata, Meganeuridae), a giant dragonfly from the Upper Carboniferous of China

A new dragonfly of family Meganeuridae Shenzhousia qilianshanensis gen. et sp. nov., discovered from Ningxia Hui Autonomous Region in North China, is described in the present paper. It has an estimated wingspan of about 450?500 mm and may be the largest fossil insect in Late Carboniferous Namurian Stage discovered by far. The new species is referred to Meganeuridae because of the presence of the characteristic oblique vein between anterior branch of radius (RA) and posterior branch of radius (RP) near the base of RP2. It differs from other genera within the family in the following characteristics: Precostal area short and not extending to the midwing; posterior branch of subcostal vein short, merging into costal vein near the level of originating point of IR₂; RP forking earlier than anterior branch of media basally; RP_1＋2 and RP_3＋4 parallel and close to each other for a long distance, and then diverge gradually surpass midwing.     

城市防灾公园规划问题

通过对日本震害后城市公园发挥了强大避震疏散作用,总结出在城市有必要规划建设避震疏散功能完善的城市公园--防灾公园.根据我国城市实际状况,对城市防灾公园规划进行了研究,给出了防灾公园实现功能所需要满足条件及其依据,具体包括:防灾公园规划的原则、类型、基本条件、地理位置的选择、规模、服务半径、人均有效避难面积、避难安全有效面积等.     

我国有机农业对植物营养和肥料使用的要求

在有机农业质量监控体系下 ,通过种养结合、轮作、施肥等措施形成有机农业生态系统内的物质循环。按照相关规定进行施肥 ,保证植物营养平衡供给 ,保持和发展土壤肥力和生物活性。同时保障了有机食品及环境的安全。     

中国传统文化对语言学习风格形成的影响

学习者的学习风格是二外习得中个体差异的一个内在的固定因素,其形成受多种外部及内部因素的影响,而学习者最基本的性格特点构成了学习风格的核心。论述了学习风格的主要分类及四种语言学习者,并探讨了中国传统文化对学习者学习风格形成的影响。     

秦岭北坡森林公园游憩价值测评

根据秦岭北坡森林公园为陕西省森林生态旅游活动的主体，而森林公园游憩价值又是非市场性的，这就需要探索新的方法来进行计量测评．基于意愿支付假设，在广泛调查的基础上，采用旅行费用法(TCM)对秦岭北坡森林公园的游憩价值进行了测评．结果显示，13个森林公园的年游憩价值合计为14140．4万元，这就为秦岭北坡森林公园产业带的生态旅游开发及经济评价提供了参考依据．