特性文件制作软件精度对比的研究

通过实验研究,比较了几种常用生成ICC特性文件的色彩管理软件的优劣,提出了针对各类特性文件规范的评价方法和评价步骤。同时,根据具体实验所获得针对几种软件产品的独立与客观的评价结果,采用色度精度分级方式,为软件用户建立了一种可靠的选择依据。     

Influence of rare earth nanoparticles and inoculants on performance and microstructure of high chromium cast iron

The high chromium cast irons (HCCIs) with rare earth (RE) nanoparticles or inoculants were fabricated in the casting process. The phase compositions and microstructure were analyzed by X-ray diffraction (XRD) and optical microscopy (OM), respectively. The hardness and impact toughness were tested by Rockwel-hardmeter and impacting test enginery. And then, the morphology of fracture was researched by scanning electron microscopy (SEM). The results demonstrated that the phase compositions of HCCIs with addition of RE nanoparticles or inoculants which were M7C3 carbides + α-Fe did not change obviously. However, the prime M7C3 carbides morphology had great changes with the increase of RE nanoparticles, which changed from long lath to granular or island shape. When the content of RE nanoparticles was 0.4 wt.%, the microstructure of high chromium cast iron was refined greatly. The microstructure of carbides was coarser when the addition of RE nanoparticles was higher than 0.4 wt.%. The hardness and impact toughness of HCCIs were improved by addition of RE nanoparticles or inoculants. The impact toughness of HCCIs was increased 36.4% with RE nanoparticles of 0.4 wt.%, but the hardness changed slightly. In addition, the adding of RE nanoparticles or inoculants could reduce the degree of the brittle fracture. Fracture never seemed regular, instead, containing lots of laminates and dimples with the increase of the RE nanoparticles. The results also indicated that the optimal addition amount of the RE nanoparticles was 0.4%, under this composition, the microstructure and mechanical property achieved the best cooperation. In addition, through the study of erosion wear rate, when adding 0.4% RE nanoparticles into the HCCIs, the erosion wear rate got the minimum 0.32×10-3 g/mm2, which could increase 51.5% compared with that without any RE nanoparticles.     

粮食厂房中门式刚架斜梁的优化

根据规范总结了门式刚架斜梁的选材及选型,再通过PKPM软件对其进行计算分析,归纳出斜梁突变位置选择的规律,为其钢梁的优化设计提供了依据。     

鳞片改性涂料的研制及应用

利用经过处理的鳞状填料所具有的相互平行叠合排列的特性，以提高涂层的密实性和抗介质渗透性。研究了鳞片改性氯磺化聚乙烯和环氧煤沥青涂料的性能及应用。     

希望的绿洲

每个人心中都拥有希望，正是这些小小的希望推动着每一个人前进。我们生活的时代充满了竞争，但对于胜利者而言，成功和失败都是一次机会，关键是看谁能比别人多爬起来一次。我们也许会在考试中面临一次次的失败，也许会在棋盘上一次次的败给对手，但是我们不应该因为这些失败而失去信心。世界之大，是让人无法想像的，正因为有着各种各样的成功与失败，才使人生充满甜酸苦辣，才使社会变得丰富多彩。随着时间的流逝，我们也一天天的长大，我们将会看到更多的社会阴暗面，会更深的了解这个社会。你将会渐渐明白，这个世界并没有你想象的那样…     

群侠聚首开启激战之旅《修罗道》

作为一个网游玩家,5D玄幻可是我的最爱,不过……,现在这类型题材的游戏可是多如牛毛,这让我只能在网游的大海里苦苦的寻找。功夫不负有心人,还真让我找到了一款叫《修罗道》网游。试玩一番,这货真是相当不错,怎么个不错法？让我们一起采探讨一番吧!     

让Windows XP一变四

Linux有着强大的桌面管理工具——虚拟桌面,而且可以在2～9个虚拟桌面间定制。虚拟桌面极大地方便了应用程序的管理。难道Windows用户就不能享受到虚拟桌面的方便吗？No,其实Windows也可以的。     

大颗粒尿素生产工艺

本文介绍了大颗粒尿素的概况和当今世界上生产大颗粒尿素的主要工艺流程,并给出了HTPG、NSM、FDG 及天津大学生产大颗粒尿素的工艺流程图和主要操作参数。最后对大颗粒尿素的前景进行了展望。     

CY-4呋喃树脂的研制与应用

以糠醇和糠醛等为原料缩合 ,研制了 CY- 4呋喃树脂 ,介绍了其物理机械性能和耐化学腐蚀性能 ,以及作为防腐蚀材料的使用实例     

鳞片改性涂料的研制及应用

利用经过处理的鳞片状填料所具有的相互平行叠合排列的特性,以提高涂层的密实性和抗介质渗透性。研究了鳞片改性氯磺化聚乙烯涂料和环氧煤沥青涂料的性能及应用。