超低碳贝氏体钢(ULCB)和耐候钢 09CuPCrNi 的耐蚀性

通过周期性浸润腐蚀试验测定了ULCB钢(%:0.05C、1.61Mn、0.51Cu、0.17Cr、0.26Ni)和耐候钢09CuPCrNi(%:0.09C、0.35Mn、0.09P、0.31Cu、0.45Cr、0.31Ni)14 mm板的耐腐蚀性能,并用偏光显微镜,X-射线衍射仪和能谱仪等研究了耐蚀机理.结果表明,ULCB钢的耐腐蚀性能优于09CuPCrNi钢;发现两种钢均存在由α-FeOOH,β-FeOOH和Fe3O4组成致密的内锈层、由α-,β-FeOOH和Fe3O4组成的疏松外锈层;Cu和Cr合金元素在锈层和锈层-钢基体界面均存在富集现象.     

食醋酿造过程中条件致腐微生物的分离鉴定及强产气菌群TYF-LIM-L09的生长特征

近年来，夏季高温条件下我国北方食醋酿造企业时常出现微生物污染情况，严重地影响了食醋的营养成分和品质。为了深入研究高温条件致腐微生物，课题组选取了5个不同批次的腐败醋样进行分离鉴定，且应用微生物宏基因组分类测序方法分析了强产气菌群TYF-LIM-L09的组成结构，并研究了该菌群的生长特征、温度与乙醇耐受、产气能力及糖代谢关键酶活性。结果表明，从腐败醋样中共分离获得了4个稳定菌群及46株细菌，其中44株菌分别属于Rummeliibacillus，Enterococcus，Vagococcus，Lactobacillus，Bacillus，Staphylococcus，Brevundimonas，Paenibacillus，另有2株分离菌尚无已知定义属。强产气菌群TYF-LIM-L09由6个以上菌属组成，其在50 ℃生长良好，能耐受体积分数高达8%的乙醇，产生CO2体积分数可高达71.43%，且该菌群的丙酮酸激酶和丙酮酸脱羧酶具有较高活力，推测其为引起食醋腐败胀气的关键微生物。     

国外的工业相控阵检测标准

在对超声相控阵检测技术进行了大量研究的基础上,人们正逐步掌握其特点。近年来国外一些重要的标准化组织,例如ASME,ISO,AWS,EN等,已认可相控阵技术的工业应用;ASTM,ISO以及EN已制订了相控阵标准或提出标准草案。概述了国外相控阵标准的制订情况和标准的基本内容和特点,为国内相控阵技术应用和标准制定提供借鉴。     

低合金钢焊接接头力学性能和耐腐蚀性的研究

介绍了俄罗斯学者有关提高低合金钢管道焊接接头力学性能和耐腐蚀性方面的研究概况。对采用高频焊和熔剂层下电弧焊焊接的09ГСФ钢和13ХФА钢接头的多项性能进行了对比,指出采用高频焊焊接的13ХФА钢接头经过720℃高温回火及随后从600℃开始的加速冷却,能获得较高的力学性能和耐腐蚀性。     

典型显示器显示控制专利申请的检索策略研究

对典型显示器显示控制领域专利申请的检索策略进行研究,全面地总结介绍了显示控制领域中等离子体显示器、液晶显示器和电致发光显示器的驱动电路和驱动方法的检索特点并针对上述不同的显示器分别列举案例进行具体分析,其中的检索思路和检索手段可供相关领域审查员参考.     

Frequency-limited H∞-controller order reduction for linear parameter-varying systems

In this paper, a controller order reduction method for linear parameter-varying systems is presented. The proposed method is based on the frequency-weighted balanced truncation technique, which has the advantage to reduce the order in a specific frequency range. The approach is discussed and is proved to preserve the closed-loop stability with a guaranteed upper error bound. Effectiveness and performance of the obtained reduced-order controller are investigated by applying it to an automotive semi-active suspension control. The obtained simulation results show that objectives such as the road handling and the passenger comfort realised with the reduced-order controller are kept in the same performance level as with the full-order controller. Moreover, a comparison with an other-order reduction method is shown and confirms the advantage of the developed method.     

RFS09烟气硫转移助剂在催化裂化装置中的应用

为了降低催化裂化再生烟气中SO_2的排放浓度,某石化有限责任公司催化裂化装置按照稀土助燃剂的添加方式,往再生系统加入烟气硫转移助剂RFS09。试用结果表明,该催化裂化装置在正常开工期间、不做任何工艺技术改造的情况下,只要通过加注烟气硫转移助剂RFS09,便可以实现烟气中SO_2达标排放,并且烟气硫转移助剂RFS09的加入对催化裂化催化剂的性质、产品分布及产品性质无明显影响。     

The UK solar energy resource and the impact of climate change

Solar energy use in the UK is increasing dramatically, providing both heat energy and generation of electricity. This trend is expected to continue due to solar technologies becoming cheaper and more readily available along with low carbon government legislation such as the Renewable Heat Incentive (RHI) and Feed in Tariffs (FiTs) supporting solar energy deployment. However, the effects of climate change on the solar resource remain largely unstudied. Climate change affects cloud cover characteristics and consequently directly affects the performance of solar energy technologies.This paper investigates the UK solar irradiation resource for both the present and future climates.The present solar irradiation level was assessed through the conversion of 30 years of observed historical monthly average sunshine duration data. The method and results are validated by comparing the converted solar irradiation levels to actual solar irradiance measurements at weather stations with significant historical records of solar irradiance data.The impact of climate change is investigated across different regions of the UK by using the UKCP09 probabilistic climate change projections.We find that the current average UK annual solar resource is 101.2 Wm⁻², ranging from 128.4 Wm⁻² in the south of England to 71.8 Wm⁻² in the northwest of Scotland. It seems likely that climate change will increase the average resource in the south of the UK, while marginally decreasing it in the Northwest. The overall effect is a mean increase of the UK solar resource, however it will have greater seasonal variability and discrepancies between geographical regions will be reinforced.     

LPG储罐用钢焊接接头冲击试样断口分析

通过焊接工艺试验研究影响LPG储罐用钢09MnNiDR焊接接头低温韧性的因素,首先对不同工艺后的焊接接头进行系列低温冲击试验,然后对不同工艺编号的冲击试样断口进行扫描电镜分析,研究了不同焊接工艺下试样断口的组织形貌特征,研究结果表明采用多层多道焊配合以较小的焊接线能量可以有效提高焊缝金属的低温韧性。     

STRUCTURAL REFINEMENT FOR Nd_2(Fe_(0.9)Si_(0.1))_(14) B FROM NEUTRON DIFFRACTION MEASUREMENT

Neutron diffraction measurements on Nd2(Fe0,Si0 ,)14B at room temperature and 77 K were performed. Data analysis using profile refinement was carried out. The results show that at room temperature Si atoms occupy preferentially 4c, 8j, and I6k2 sites, and the magnetic moments of bath Nd and Fe are parallel to C—axis. At 77 K, the site occupations remain unchanged as in room temperature, while the calculated Nd magnetic moment direction has an angular deviation of 37.8 ° from C—axis.