SC110型汽车半轴齿轮的冷摆辗成形

简介PXW-200型冷摆辗机的结构与原理.概述冷摆辗SC110半轴齿轮的工艺设计及工艺参数,模具结构和制造.     

甘肃省玉米产量的气候特征及其与中国大陆OLR的关系研究

对甘肃省５５个站点的玉米气候产量经ＥＯＦ及ＲＥＯＦ分解后，通过对其载荷量的分析，表明陇东南地区是甘肃省玉米产量最具代表性的区域，并进一步将甘肃省玉米气候产量划分为５个自然气候区：陇东区、陇南区、中部及阴湿山区、干旱山区、河西灌溉农业区。玉米气候产量的第一主分量可代表甘肃省玉米气候产量的时间趋势。它与同年５～９月份ＯＬＲ有很好的相关关系。     

离合器盘毂的冷摆辗成形

简述离合器盘毂的冷摆辗成形过程。分析中碳钢冷摆辗成形的技术特点,介绍产品质量特征。     

寒区部队营区大气污染调查与评价

于冬夏两季监测了哈尔滨，长春，锦西部队营区大气中ＳＯ２，ＣＯ，ＮＯｘ，ＴＳＰ及苯并芘浓度。结果表明，３市上述５项指标夏季均在标准以下；冬季长春市ＮＯｘ，ＴＳＰ超过标准，５项指标冬季均高于夏季；１日内ＳＯ２，ＮＯｘ，ＴＳＰ变化规律为早＞晚＞中，ＣＯ为早＜中＜晚；不同纬度城市浓度变化规律不明显。以沈阳大气质量指数评价夏季长春营区属“中污染”，合为“轻污染”，冬季３市均为“中污染”。     

微波镧有机交联改性膨润土吸附磷的研究

用浸泡的方法把制备好的镧改性的膨润土，再用十六烷基三甲基溴化氨表面活性剂进行改性，制备一种新的吸附剂交联有机膨润土应用于除磷研究，其效果比原来的镧改性的无机吸附剂吸附量提高了30％。其最佳制备工艺为：表面活性剂的浸泡浓度为5％，微波功率为166W，微波辐射时间为6min，溶液的pH为3—4，震荡时间为45min。磷去除率达到了99％以上，吸附量达到了60mg／g以上，从而为含磷废水的处理提供了一条高效、经济的新途径。     

伏安法测定地下水中的氟

本文采用三电极系统（工作电极：玻碳电极；参比电极：甘汞电极；辅助电极：铂电极）研究了Pr（Ⅲ）－ALC－F体系吸附波的特性。在pH＝1．0的六次甲基四胺、硝酸溶液中，峰电位Ep＝-0.66V（vs．SCE）处，峰电流与F浓度在1×10－7至1×10－5mol／L范围内呈线性关系，检出限为：8×10－8mol／L，精密度为；0．7％。本法适用于各种样品的分析，具有灵敏度高，抗干扰能力强，试验简便无毒的特点。用该方法测定了地下水中的氟离子，结果令人满意。     

A Quantitative Analysis of Energy Dissipation among Three Typical Air Entrainment Phenomena

This study investigates energy dissipation due to air bubble entrainment for three typical phenomena; a hydraulic jump, a 2-D vertical plunging jet and a vertical circular plunging jet into water. A simple model is presented here which enables to estimate the energy transformation and dissipation achieved by air bubbles quantitatively for three above phenomena. The average rate of energy dissipation by air bubbles obtained from the experimental data are 25%, 1.4%, and 2.15% with respect to total energy loss for the hydraulic jump, 2-D vertical plunging jet and vertical circular plunging jet, respectively.     

倏逝波荧光免疫传感器在环境检测中的研究进展

倏逝波荧光免疫传感器是利用光波在波导内,以全反射方式传输时在波导界面产生倏逝波,结合荧光免疫分析原理进行检测的一类新型传感器.该类传感器具有特异性强、灵敏度高、检测速度快、费用低、操作简便等优点,在环境检测、医学临床、食品卫生等领域具有广泛的应用前景.在介绍倏逝波荧光免疫传感器原理、结构及其特点的基础上,综述了该类传感器在环境检测领域的研究进展.     

Water regime-nitrogen fertilizer incorporation interaction: Field study on methane and nitrous oxide emissions from a rice agroecosystem in Harbin, China

Water regime and nitrogen (N) fertilizer are two important factors impacting greenhouse gases (GHG) emission from paddy field, whereas their effects have not been well studied in cold region. In this study, we conducted a two-year field experiment to study the impacts of water regime and N fertilizer on rice yields and GHG emissions in Harbin, China, a cold region located in high latitudes. Our results showed that intermittent irrigation significantly decreased methane (CH₄) emission compared with continuous flooding, however, the decrement was far lower than the global average level. The N₂O emissions were very small when flooded but peaked at the beginning of the disappearance of floodwater. The N fertilizer treatments increased CH₄ emissions at low level (75kgN/ha). But both CH₄ and N₂O emissions were uninfluenced at the levels of 150kgN/ha and 225kgN/ha. Rice yields increased under intermittent irrigation and were highest at the level of 150kgN/ha. From our results, we recommended that the intermittent irrigation and 150kgN/ha as the ideal water regime-nitrogen fertilizer incorporation for this area to achieve low GHG emissions without impacting rice yields.     

超材料在舰船电磁环境控制中的应用探索

首先阐述了国内外水面舰船电磁干扰控制技术和雷达波隐身技术的发展现状,然后介绍了近年来电磁超材料(Metamaterial)的研究进展,并对其可应用于水面舰船总体电磁环境控制方面的潜在应用进行挖掘与探索,最后对未来水面舰船的雷达波隐身性设计和电磁兼容性设计的一体化解决方案进行了展望。