Modeling and simulation of heat transfer for glass bulb mold

Cooling system design in glass bulb pressing operation can greatly affect the productivity and the quality of the final product. The concept of cyclic-averaged steady temperature field is proposed in modeling. Heat transfer in the mold region is considered to be a cyclic-steady, three-dimensional conduction; heat transfer within the glass melt region is treated as a transient, one-dimensional conduction; heat exchange between the cooling system surface and coolant is treated as a steady heat convection. A hybrid model consisting of a three-dimensional boundary element method for the mold region and a finite-difference method with a variable mesh for the melt region is used for numerical simulation. Compared with the experimental data, the numerical model developed here is computationally efficient and sufficiently accurate.     

黑线仓鼠、棕色田鼠和大林姬鼠犁鼻系统的显微结构观察

用光镜观察并比较了黑线仓鼠(Cricetulus barabensis)、棕色田鼠(Microtus mandarinus)和大林姬鼠(Apodemus peninsulae)犁鼻器和副嗅球的结构．结果表明，黑线仓鼠和棕色田鼠犁鼻器在位置和形态上相似，但这三种鼠犁鼻上皮、犁鼻管腔和犁鼻血管均有较明显的差异．黑线仓鼠和棕色田鼠副嗅球中嗅小球层和颗粒层也存在明显的差异．通过对这两种结构的比较，说明犁鼻系统的结构差异与鼠类的生活环境和繁殖行为有关．     

Infection of Wolbachia may improve the olfactory response of Drosophila

The endosymbiotic bacterium Wolbachia infects various insects and is primarily known for its ability to manipulate host reproduction.Recent investigations reveal that Wolbachia also affects the activity of somatic cells.We here demonstrated by trap method and T-maze that Wolbachia infection had signifi-cant impact on the olfactory response of Drosophila simulans.Wolbachia-infected flies took shorter time to enter the food trap and were more sensitive to odorant in T-maze than those uninfected controls.The t...     

人工嗅觉技术在智能火灾探测中的应用研究

介绍了人工嗅觉模拟技术的原理，提出了一种利用神经网络和模糊系统理论设计智能建筑火灾报警系统的方法。     

2000年前我国潮汐能源开发利用的战略研究问题

我国沿海地区煤、河川水力资源有限,仅靠发展水、火电常规能源难以满足能源需要,须开发该区丰富的潮汐新能源。潮汐能是再生能源,用之不尽;且会自动送能上门,电站运行费省;又无淹田、拆迁建筑物、污染环境等问题;工程尚可发挥水产、围垦、航运等综合利用效用,优点较多。国内外多座潮汐电站建成经验表明,潮汐发电技术上是可行的。全面衡量其经济性,不在火电等常规能源之下。今后在技术上宜抓紧研究提高,并发挥其多方面综合效用,以降低造价提高经济效益。     

灯泡贯流式水轮机灯泡体与引水管间流场的有限元计算

本文提出一种利用有限元计算方法求解灯泡贯流式水轮机灯泡体与引水管间流场的方法,可用于灯泡体曲线优化选型。     

Tracing neuronal tracts in the olfactory pathway of rat and detecting ischemic core in a rat model of focal ischemia using manganese enhanced magnetic resonance imaging

Manganese enhanced magnetic resonance imaging(MEMRI) is a novel neuroimaging technique first intro-duced by Lin et al. in 1997[1]. In this technique, bivalentmanganese ion (Mn2+) is used as a tracer for Ca2+, an im-portant substrate for neurotransmission. By monitoring thetransportation of Ca2+ between the cells and synapses,MEMRI can be used in vivo to trace neuronal tracts and tostudy brain functions dynamically. That Mn2+ can be usedas the tracer for Ca2+ is because it has two special…     

大米百合发酵型乳酸饮料的工艺探讨

以大米、百合干为原料，研制发酵型乳酸饮料，运用正交试验确定其最佳工艺条件为：大米：百合干=4：1乳酸菌接种量为4％，发酵时间为72h．产品具有风味俱佳、酸甜适口、营养保健之特性．     

不同培养基对朱顶红愈伤组织诱导影响的研究

通过研究激素配比对朱顶红愈伤组织诱导,解决了外植体褐变问题。结果表明:朱顶红的培养条件为:温度25±1℃,光照16 h/d,光照强度3 000 lx 左右,pH 为5.6～5.8。愈伤组织诱导培养基以 MS NAA 1.0mg/L BA 2.0mg/L AC1.0mg/L 为好,30d 后启动率可达86.4%。     

小鼠嗅鞘细胞的分离、纯化和免疫细胞化学特性

目的:对小鼠嗅鞘细胞的体外分离、纯化和免疫细胞化学特性进行研究.方法:分离新生小鼠嗅鞘细胞,综合运用差速贴壁法、阿糖胞苷抑制和丝裂原刺激等方法对其进行纯化,并用免疫细胞化学方法对其进行检测.结果:体外培养的新生小鼠嗅鞘细胞主要为双极或三极细胞.纯化培养后其纯度可以达到88.7%以上,污染细胞中有星形胶质细胞、神经元、少突胶质细胞和成纤维细胞.免疫组化结果提示,嗅鞘细胞呈P75和CNP免疫阳性,GFAP和Nestin阴性.结论:本研究对新生小鼠嗅鞘细胞的形态学和免疫细胞化学特性提供了部分数据.但不同的取材时间,不同的培养条件对嗅鞘细胞的影响尚需进一步研究.