高强压铸铝合金抗腐蚀性能的研究

在相同试验条件下,在腐蚀液酸、碱、盐等介质中,做了浸渍腐蚀、晶间腐蚀等对比试验,并测定了恒电位极化曲线。结果表明,高强压铸铝合金比一般铝硅合金具有较好的抗腐蚀性能,从试验和理论上验证了铝硅合金在高速冷却下凝固时,提高含铜量并不降低其抗腐蚀性能。     

针织服装的特点与设计

本文对针织服装的设计、装饰手法的运用以及舒适合体等方面进行了初步的分析和研究，其目的是为了从理论上探讨针织服装的特点，以利于开发出更多的针织服装新品种     

Establishing Submersed Macrophytes via Sinking and Colonization of Shoot Fragments Clipped off Manually

In this paper, sinking and growth of apexes and mid-stems of Myriophyllum spicatum L., Hydrilla verticillata （L.f.） Royle and Ceratophyllum demersum L. in concrete ponds containing eutrophic water and sediment were investigated. Sinking rates of apexes and mid-stems reached 34.8% and 4.4% at the 6 th day and 91.1% and 66.7% at the 22 nd day for M. spicatum, 57.8% and 55.6% at the 6 th day and 100% and 97.8% at the 22 nd day for H. vertieillata, 18.9% and 86.7% at the 6 th day and 95.6% and 100% at the 22 nd day for C. demersum, respectively. Most sunken fragments established themselves successfully with significant growth. Total shoot length ofplantlets developed from apexes and mid-stems increased by 399% and 61% for M. spicatum, 593% and 256% for H. vertieillata and 114% and 104% for C. demersum, respectively. The results showed that it was feasible to establish submersed macrophytes via sinking and colonization of shoot fragments clipped off manually.     

连铸结晶器弯月面区温度波动的模拟研究

作者设计了连铸结晶器弯月面处传热模拟实验 ,并测量了在结晶器振动情况下弯月面处的温度 ,发现该温度随着结晶器的振动而产生周期性的变化 .基于这种温度波动现象 ,讨论了包括热顶结晶器、高频小振幅振动、软接触结晶器电磁连铸等诸多技术改善铸坯质量的机理     

Mechanism of brittle-ductile transition of a glass-ceramic rigid substrate

The hardness, elastic modulus, and scratch resistance of a glass-ceramic rigid substrate were measured by nanoindentation and nanoscratch, and the fracture toughness was measured by indentation using a Vickers indenter. The results show that the hardness and elastic modulus at a peak indentation depth of 200 nm are 9.04 and 94.70 GPa, respectively. These values reflect the properties of the glass-ceramic rigid substrate. The fracture toughness value of the glass-ceramic rigid substrate is 2.63 MPa?m1/2. The material removal mechanisms are seen to be directly related to normal force on the tip. The critical load and scratch depth estimated from the scratch depth profile after scratching and the friction profile are 268.60 mN and 335.10 nm, respectively. If the load and scratch depth are under the critical values, the glass-ceramic rigid substrate will undergo plastic flow rather than fracture. The formula of critical depth of cut described by Bifnao et al. is modified based on the difference of critical scratch depth     

基于投入产出模型的武钢炼铁系统能耗与节能潜力分析

针对武钢炼铁系统建立多级能源投入产出模型,采集并分析武钢炼铁系统2010~2013年生产及能源数据,通过该模型计算焦炭、烧结矿及铁水的能值与能耗,运用吨钢能耗e-p分析法计算工序节能量,采用指数平滑法预测未来一年的能源需求量。结果表明,降低焦化、烧结、高炉工序能耗,加大回收余热、余能等二次能源的力度,增加喷煤量以提高煤焦置换比以及优化生产结构等措施均有助于该炼铁系统的能耗降低。     

油橄榄(O. europaea L.)在四川的现状与开发研究

介绍了油橄榄树种的植物生物学特性，生长习性和对生长环境的生态因素的要求，对在四川各地零星散落的各个品种进行了相关因子的比较，并对各品种现状表现呈现差异性的原因进行了分析，为油橄榄作为退耕还林、生态重建和农村小康建设的造林绿化经济植物的开发推广提出了一系列设想和措施。     

三维编织复合材料威布尔概率分布数学模型

首先分析了三维编织工艺和预制件细观结构,对三维编织复合材料基本的单胞力学模型进行分析,然后运用三细胞模型,对圆形截面三维编织复合材料的工程弹性常数进行理论预测,最后通过数学推导,导出了三维编织复合材料剩余刚度和疲劳寿命的威布尔概率分布函数的表达式,并给出了上述两个分布函数中有关参数的确定方法,为进一步研究三维编织复合材料疲劳寿命试验和寿命预测提供一定的理论依据.     

高填路堤下涵洞病害机理

针对某高填路堤涵洞实体工程的病害，采用压力盒、水准仪及沉降观测仪器对其进行了全程监控，依据所测压力、沉降以及裂缝形态阐述了涵洞裂缝的产生机理，井从地基、基础、填土等方面分析了涵洞病害产生的因素，推定了涵洞基础扭转破坏的运动过程。指出在涵洞设计中应综合考虑地形因素，避免产生“扁担效应”，同时在现场施工过程中应采取合理的施工速度。     

Estimation of Incident-Induced Congestion on Signalized Arteries Using Traffic Sensor Data

This paper describes how to derive quantitative information about the effect of traffic incidents on urban traffic flow from the raw measurements detected by sectional loop sensors. The two critical parameters of the travel delay and queue length, which reflect the temporal and spatial properties of incident-induced congestion, cannot be directly determined from commonly used loop sensors. The modified queuing diagram is used here to quantify incident-induced queues and travel delays on signalized arteries using sensor data from the targeted and upstream links. The method is tested using data generated by the VISSIM simulation model, with results indicating its efficiency and accuracy with an average relative travel delay error of 18.67% for all samples which falls to 8.07% for high volume and very high volume conditions.