提高喷油泵齿杆滑动性的工艺改进

随着柴油机的发展,齿轮齿杆式喷油泵的油量调节机构得到了越来越广泛的应用。本文通过工艺改进解决了齿杆滑动性差的问题,使批量生产的喷油泵总成齿杆的滑动性大大提高。     

The glutenin fraction of wheat protein: The importance of genetic background on its quantity and quality

The influence of high-molecular-weight glutenin subunits on the properties of the gel-protein fraction of glutenin proteins in wheat was determined on 20 varieties grown in the 1989 UK Recommended List trials. Both the presence of subunit 1 (chromosome 1A) and the 1B/1R rye translocation were shown to influence gel-protein weight and breakdown rate during mixing. The gel-protein tests were correlated with CBP (Chorleywood Bread Process) loaf volume, but they did not add anything to the correlation between Glu-1 score and loaf volume. Both gel-protein tests indicated that phenotypic variation could be almost as large as genotypic variation. Breakdown rate was able to detect the abnormal properties of Pastiche (weak) and Fresco (extra-strong) that were not observed using established quality tests such as the sodium dodecylsulphate sedimentation volume.     

基于Vague集的多属性决策新方法——投影法

定义了Vague集理想方案以及决策方案在Vague集理想方案上的投影等概念,提出了一种新的基于Vague集的多属性决策方法--投影法,该方法利用决策方案在Vague集理想方案上的投影进行排序并选出最优方案,为决策系统提供了一个有用的工具.实例分析表明了该方法的有效性和实用性.     

磁控溅射法制备AZO薄膜的工艺研究

用XRD测试仪、分光光度计、四探针等测试仪器,探讨了制备气氛、退火温度和退火环境对AZO薄膜光电性能及结构的影响。结果表明:氧气和氩气的体积流量比为2∶1时,薄膜透光率最高(95.33%);退火有利于薄膜结晶;低于400℃退火时,温度越高薄膜电阻越小,超过400℃后,真空中退火温度再升高电阻变化不大,而空气中退火温度再升高电阻反而变大。     

WLY202—CW挖掘机特殊故障的分析及排除

文章针对ＷＬＹ２０２—ＣＷ全液压轮式挖掘机在运行初期所出现的液压先导系统特殊故障进行了分析,并依据分析结果顺利解决了因厂家制造缺陷所造成的该故障。其分析、排除故障的思路和方法,对其它型号的全液压挖掘机也具有一定的参考价值。     

基于收益优化的研制系统任务接受策略研究

研制系统任务接受策略对于研制系统效用发挥十分重要。接收任务越多,研制系统利用率越高,但由于资源限制可能使任务延误,甚至造成重大损失。对接受任务策略进行了研究,提出基于任务到达时首过程任务个数的决策模型,并通过建立研制系统排队网络模型,对进行决策参数进行求解。采用该决策方法操作简单,最适用于首过程与关键过程服务能力差异不大的系统。最后,通过实例对该方法提出了说明。     

基于直觉模糊集多属性决策的灰色关联分析法

基于直觉模糊集理论,提出了一种新的灰色关联分析方法来研究模糊多属性决策问题.首先,根据直觉模糊集的几何意义,引入了两个直觉模糊集之间的距离,且每个备选方案的评价值用直觉模糊值表示.其次,依据传统灰色关联分析方法的基本思想,通过计算每个方案对直觉模糊正、负理想方案的灰色关联度.然后计算备选方案对直觉模糊正理想方案的相对关联度度.最后,通过一个具体实例说明该方法的有效性和具体应用过程.     

关于加快发展木材造纸的几点看法

造纸工业发展必须以木材纤维原料为主,我国具备发展木材纤维原料造纸的资源条件,只要坚持走林纸结合的道路,加快造纸专用人工林建设,造纸所用的木材纤维原料一定会有突破性的发展。     

对欧盟《科学与社会行动计划》的思考

欧盟实施《科学与社会行动计划》的宗旨是促进科学与社会关系和谐发展,强化研究人员、企业家、决策者与公众之间的对话,拉近科学与社会的距离。这也是创建欧洲知识经济社会的关键。欧盟的《科学与社会行动计划》具有很强的欧洲特征,在很大程度上,需要在整个欧洲层面上进行这个被民众普遍关注问题的研究,从不同国家得到互补的经验。目前在欧洲,科学与社会的含义己远远超越了人们常说的“科普”,它的研究领域和活动范围是不能仅以科学知识传播和普及来替代的。     

Optimal Scheduling of Utility Electric Vehicle Fleet Offering Ancillary Services

Vehicle‐to‐grid presents a mechanism to meet the key requirements of an electric power system, using electric vehicles (EVs) when they are parked. The most economic ancillary service is that of frequency regulation, which imposes some constraints regarding the period and duration of time the vehicles have to be connected to the grid. The majority of research explores the profitability of the aggregator, while the perspective of the EV fleet owner, in terms of their need for usage of their fleet, remains neglected. In this paper, the optimal allocation of available vehicles on a day‐ahead basis using queuing theory and fuzzy multi‐criteria methodology has been determined. The proposed methodology is illustrated on the daily scheduling of EVs in an electricity distribution company.