大城市周边重点镇总体规划策略——以南宁市金陵镇为例

研究结合大城市周边重点镇的特征,基于城镇空间的双重属性—中心城的辐射影响地区及局部区域的发展中心,提出"区域联动、地方联合"的规划策略,并结合南宁市金陵镇的规划实践案例探讨策略的合理性及适用性,以期为其他大城市周边重点镇的规划建设提供参考。     

定向破片拦截下RPG-7类反坦克火箭弹(静态)毁伤模式的试验研究

为优化主动防护系统的性能,文中以静态放置的RPG-7类反坦克火箭弹战斗部为例,对其在密集破片作用下的毁伤模式进行了理论分析,并在典型条件下进行了试验验证。试验结果表明,战斗部结构解体、引信失效、装药被击爆、装药和药型罩被损坏以及装药燃烧等毁伤模式都存在,验证了理论分析的结果。文中的研究结果可为主动防护系统拦截交会参数的选择、拦截弹战斗部破片场参数的优化设计提供有益的参考。     

Differentiated Electric Behaviors of La2/3Cu3Ti4O12 Ceramics Prepared by Different Methods

Microstructure and electric behaviors of La_2/3Cu₃Ti₄O₁₂ (LCTO) ceramics prepared by the sol‐gel method (SG) and solid‐state method (SS) have been systemically investigated. The results indicated that LCTO‐SG ceramics sintered at 1105°C for 15 h showed larger grain size, higher density, and especially higher dielectric constant up to about 0.9–1.6 × 10⁴ at 10²~10⁵ Hz compared to LCTO‐SS ceramics. The higher dielectric constant of the LCTO‐SG ceramics might be due to the stronger internal barrier layer capacitor (IBLC) effect. More notably, compared with LCTO‐SS ceramics, two kinds of dielectric anomalies, one conduction activation energy value and same activation energies for the conduction and relaxation process in LCTO‐SS ceramics, the LCTO‐SG ceramics showed three kinds of dielectric anomalies, two values of conduction activation energy, and decrease in conduction activation energy with increasing temperature. The activation energies for the conduction and relaxation process in LCTO‐SG ceramics showed great difference below about 210°C, suggesting that the mechanism of electrical conduction and dielectric relaxation seem to be different in LCTO‐SG ceramics. These remarkable differences in electric behaviors of LCTO ceramics prepared by sol‐gel and solid‐state methods were firstly found and analyzed.     

Physicochemical Property and Fatty Acid Profile of Cephalotaxus fortunei Nut Oils

This paper focused on the main composition of Cephalotaxus fortunei nuts, the physicochemical property of its oils, the fatty acid profiles and the content of alkaloids and tocopherol in the nuts oils. And these elements were compared among three kinds of C. fortunei nuts and their oil. The results showed the C. fortunei nuts contained about 65 % crude oil. Meanwhile, the content of crude protein, crude fiber, moisture, ash and reduced sugar were presented, respectively. The important physicochemical indicators of the crude C. fortunei nuts oils were presented, including specific gravity, refractive index, viscosity, acid value and saponification value, etc. The contents of alkaloids were 0.41 % in NUT1, 0.24 % in NUT2 and 0.31 % in NUT3. The contents of tocopherol were low. The analysis of the fatty acid composition showed that the three kinds of oils were all rich in unsaturated fatty acids, oleic acid and linoleic acid, and the main triacylglycerols were dioleoyl-monolinoleoyl (OLO) and triolein (OOO). This work might help with the exploration of the applications of C. fortunei nuts and its oil.     

Biomolecular Structure and Dynamics with Neutrons: The View from Simulation

The characterization of the structure and internal dynamics of biomolecules is essential to understanding their biological function. Neutron scattering probes similar time- and length-scales to molecular dynamics simulation. Hence, simulation models of biomolecules have become invaluable in the interpretation of experimental neutron data. Here, we report on advances in the application of simulation in developing neutron scattering to investigate internal protein motions and, as an example of industrial relevance, in the derivation of physical models of use in biofuel renewable energy research.     

集中式提纯器的设置与具有中间等级氢气网络的优化

氢气系统的集成与优化对于炼厂合理配置氢气资源和降低生产成本具有重要意义。针对具有中间等级氢气分配网络系统,本文提出了先确定中间等级状态再设置集中式提纯器的氢气网络分步优化模型,分析了在具有中间等级氢气网络中优化设置集中式提纯器的策略,并通过实例阐明了本文所提出方法的有效性。研究表明:对于具有中间等级的氢气网络系统,集中式提纯器应设置在氢源与中间等级之间,本文所提出的优化方法不仅使氢气网络结构具有可扩充性,而且可降低氢气公用工程的用量,减少炼厂的用氢费用。     

园林绿化废弃物在污泥好氧发酵上的应用

园林绿化废弃物是一种绿色废弃物,由于其组成及结构的特殊性,园林绿化废弃物是作为污泥好氧发酵的良好结构剂调理剂,有着一定的优缺点,能够很好地提高堆肥效率。同时经过二次发酵堆肥腐熟后的物料,其品质优良,是作为生产有机肥的良好原材料,能够更好地提高作物产量与品质。     

可持续性设计与高层建筑设计的相关问题探讨

由于高层建筑的结构特点有别于普通建筑,使得它在进行设计时面临着更多的难题。针对这一问题,笔者从可持续发展的角度,对可持续设计和高层建筑设计之间的相关问题进行了一系列探讨。     

问津书院空间形态研究

问津书院是湖北省现存最完整的书院之一。本文以问津书院为研究对象,力图通过对其遗存的建筑群落进行详细剖析,以明了华夏传统的建筑文化的具体体现,为今后的建筑创作工作提供一些有益的借鉴。