锚固路堑高边坡稳定性非线性模糊评判

针对路堑高边坡锚固后的稳定性评价,基于模糊性与层次性构建锚固路堑高边坡稳定性2级模糊综合评判模型。根据不同类评价指标的取值方法及隶属度函数选取原则,建立统一的隶属度确定方法,采用三角模糊数互补判断矩阵排序方法确定权向量,以体现评价指标重要程度比较的不确定性。引入非线性模糊算子,以消除个别影响因素不利时对结果的突出影响,使评价结果能更真实地反映工程实际状况。以京新高速公路路堑高边坡稳定性评价为应用实例,验证该模型的可行性与合理性。     

城市轨道交通列车编组形式与牵引电机的选择

针对城市轨道交通列车编组形式和牵引电机之间的匹配问题,对3种典型编组形式及电机的参数选择做了分析和总结,并以南京地铁1号线为例进行了验证。     

青藏客车制动系统简介

介绍了青藏客车制动系统的主要技术特点、技术参数和组成。     

Biochemical composition of marine sediment from the eastern Weddell Sea (Antarctica): High nutritive value in a high benthic-biomass environment

Within the SCAR's international EASIZ programme, as part of the benthic–pelagic coupling experiment, grain size and organic matter contents in marine surface sediment were measured. Samples were taken during the austral autumn of 2000 from 3 regions in the eastern Weddell Sea: Kapp Norvegia, Four Seasons Bank, and Austasen.In general, sediments were fine sand with a grain size fraction < 200 μm representing more than 40% of the total weight. The sediments from Four Seasons Bank (64 to 107 m depth) were coarser than those from Austasen and Kapp Norvegia (209 to 480 m depth), presumably due to winnowing of fine sediment at shallow depths. Organic carbon (OC) content ranged from 0.25% to 1.2% and constituted 10% to 97% of the total carbon. The samples from Kapp Norvegia presented the highest OC values. Overall, protein (PRT), lipid (LPD), and carbohydrate (CHO) contents were similar to those in sediment from cold regions (e.g., the North Atlantic and the Ross Sea) but higher than those in sediment from other Antarctic and more septentrional regions (e.g., the Ross Sea and the Mediterranean). The difference within the Antarctic is explained through the local conditions in Terra Nova Bay and Kapp Norvegia. In the Antarctic, PRT and LPD carbon were the main contributors to the biopolymeric carbon (BPC). In the eastern Weddell Sea shelf, the BPC accounted for more than 90% of the OC in most of the samples. More than 82% of the total PRT, LPD, and CHO were present in the fraction < 200 μm. This work remarks the existence of sediments with a high nutritional value persistent several weeks after the spring–summer pulse of fresh organic matter. It is also highlighted the high potential availability of these sediments (due to its grain size) for the benthic communities inhabiting this high-latitude continental shelf.     

利用绝对盐度参数的海水盐度新计算方法

通过总结前人工作和理论分析,简要介绍了海水盐度传统定义方法及其优缺点;详细叙述了采用绝对盐度来表述海水盐度新定义方法;概括比较了盐度新定义对盐度旧定义的改进之处,与实用盐度标度相比,利用绝对盐度作为表述盐度的参数具有多方面的优点。介绍了1种绝对盐度估计方法,对其发展进行了展望。     

城市现代有轨电车制动控制系统的研制

分析了现代有轨电车制动系统的主要特点,介绍了四方车辆研究所研制的有轨电车制动系统的组成、主要功能、作用原理及试验验证情况。     

关于SiO_2-B_2O_3-Al_2O_3-MgO-K20-F系可加工玻璃陶瓷的研究

研究了化学成分、热处理工艺等因素对SiO_2-B_2O_3-Al_2O_3-MgO-K_2O-F系可加工玻璃陶瓷的组织和性能的影响。改变化学成分可影响玻化及结晶过程。结果表明,降低MgO、Al_2O_3的含量,可降低玻化温度;Al_2O_3强烈抑制失透;F对玻化过程的影响不大,但在晶化过程中起形核剂的作用。在结晶处理过程中,随着核化温度的升高,核化时同的延长,晶体的形核率增高,晶体的体积百分数增大。晶体的体积百分数越高,纵横比越大,玻璃陶瓷的可加工性越好。     

Si-Al-F 系可加工陶瓷制备工艺的研究——化学成分对玻化、结晶过程的影响

玻化和结晶过程是可加工陶瓷制备过程中重要的环节．本文研究了化学成分对玻化和结晶阶段的影响，在玻化阶段希望得到均匀的玻璃熔体，并且冷却过程中不出现晶化；在结晶阶段又希望得到较高的结晶度，这就必须控制晶化成分的加入量．Ａｌ２Ｏ３和ＭｇＯ的含量降低可使玻化温度降低；ＭｇＯ又是结晶过程的形核剂，含量不宜过低；氟化物含量高可使玻化温度降低，既是助熔剂又是形核剂．最后给出了可以在玻化阶段得到均匀透明玻璃熔体而结晶阶段可获得较高结晶度的最佳配方．     

单位球上小Bloch型空间之间的紧复合算子

用类似于单位圆盘D上小Bloch型空间之间紧复合算子的论证方法,得到了对所有的0〈p,q〈∞,C^n中单位球上小Bloch型空间β0^Dβ0^q之间的复合算子Cφ为紧算子的充要条件：对一切l=1,2,…,n有φl∈β0^q且 1）当0〈p〈1/2时,lim ｜z｜→1 （1-｜z｜^2）^q/（1-1φ（z）｜^2）^p｜〈Rφ（z）,φ（z）〉｜=0; 2）当p=1/2时,lim｜z｜→1（1-｜z｜^2）^q/（1-｜φ（z）｜^2）^2/1｜（1-｜φ（z）｜^2）In^22/1-｜φ（z）｜2｜Rφ（z）｜^2＋｜〈Rφ（z）〉｜^2}^1/2=0; 3）当p〉1/2时,lim｜z｜→1（1-｜z｜^2）^q/（1-｜φ（z）｜^2）^p{（1-｜φ（z）｜^2）｜Rφ（z）｜^2＋1〈Rφ（z）,φ（z）〉｜^2}^1/2=0.     

宁波市轨道交通2号线一期工程车辆编组方案研究

对宁波市轨道交通2号线一期工程初、近期采用4辆编组与6辆编组方案,从配属车辆、行车间隔、牵引能耗、满载率与拥挤度、资源共享等多个方面进行研究比选.研究表明,初、近期高峰高断面客流分别为1.18万人次/h、1.89万人次/h,在初、近期客流比远期客流较小的情况下,同等运营服务水平下4辆编组的运输效率要优于6辆编组,同等购...