基于Flash的数字地质博物馆

该文是对基于Flash MX的数字地质博物馆从构想到构建的说明,以及对实体地质博物馆、传统数字地质博物馆和基于Flash的数字地质博物馆进行比较。详细介绍了数字地质博物馆的发展现状和建设数字地质博物馆的可行性与必要性,最后对于博物馆的创新点和进一步改进提出了建设性意见。     

Flash MX在多媒体课件中的应用

介绍了FlashMX的特点以及在实践的基础上总结出的制作动画效果的方法和应用实例。     

Positive and negative selection LYS5MX gene replacement cassettes for use in Saccharomyces cerevisiae

Novel MX cassettes are described that contain the open reading frames (ORFs) of Saccharomyces cerevisiae or Candida albicans LYS5. The LYS5MX and CaLYS5MX cassettes, the targeting efficiencies of which are equivalent to those of other MX cassettes, are positively selected for Lys+ in a lys5 background. Unlike most of the other MX cassettes, the LYS5MX cassettes are also negatively selectable (alpha-aminoadipate-resistant), which will allow the use of the LYS5MX cassettes in plasmid shuffling and will also greatly facilitate marker recycling.     

Static recovery of tempered lath martensite microstructures during long-term aging in 9-12% Cr heat resistant steels

Static recovery of tempered lath martensite microstructures of strength enhanced ferritic steels has been investigated during very long-term aging up to 2 × 10⁴ h at 650 °C for 3 steels containing 9 to 12% Cr. Static recovery of tempered lath martensite microstructure occurs after an incubation period for 1-2 × 10³ h in the steels. The static recovery is controlled by the loss of strengthening due to M₂₃C₆ precipitates, and disappearance of MX carbonitrides cannot be the main cause of the static recovery.     

通过ADS7846在PDA上实现个性化书法输入

目前,在嵌入式系统中通过触摸屏写出的文字,笔划粗细都是相同的,字迹显得僵硬,不如毛笔字或钢笔字潇洒大方且风格多样。提出了一种适用于PDA及其它嵌入式设备的低成本、高速度、简单可行的解决方法,使得在触摸屏上书写时,LCD屏上能显现出如同毛笔字或钢笔字的传统书法特色的文字,笔划粗细疏密有致,字迹亲切自然,同时也能显现出书写人笔迹的个性风格。     

海水淡化远程数据采集终端的设计与实现

该文设计了一种以基于ARM CORTEX-A9四核架构的I.MX6Q芯片为核心处理器的远程数据采集终端。该设计集成了RS232接口、RS485总线接口、CAN总线接口、千兆以太网、WIFI模块、3G模块、7寸LCD触摸屏、HDMI高清接口、SD卡接口和USB接口等,可运行Linux3.0.35系统和QT应用程序。实际应用证明,该终端的数据采集和网络传输具有很的可靠性好、较高的速率和很好的人机交互性,在工业现场的数据采集与设备控制方面有广泛的应用前景。     

有机膦酸对硫氧镁水泥的改性研究

本文探究了两种有机膦酸对硫氧镁水泥抗压强度、耐水性能和凝结时间的影响,通过X射线衍射、同步热分析和扫描电子显微镜测试对硫氧镁水泥的物相组成及微观形貌进行表征和分析。结果表明:当氨基三亚甲基膦酸(ATMP)掺量在0.75%(质量分数,下同)时,相较空白组28 d抗压强度增加了113.99%,软化系数增加了101.86%;羟基乙叉二膦酸(HEDP)掺量为0.75%时,硫氧镁水泥表现出最佳机械强度及较高的缓凝效果,且软化系数达到0.93;两种有机膦酸进行复配(总掺量为0.75%),当m(ATMP)∶m(HEDP)为3∶1时,对硫氧镁水泥具有最佳改性效果。有机膦酸能与MgO水化过程中产生的[Mg(OH)(H₂O)_x]⁺形成稳定的螯合物,减缓活性MgO水解为Mg(OH)₂的进程,从而延缓硫氧镁水泥的凝结时间,为硫氧镁水泥在实际工程中的应用提供了可行性。     

DsdA (D-serine deaminase): a new heterologous MX cassette for gene disruption and selection in Saccharomyces cerevisiae

Dominant drug resistance markers offer experimental flexibility in the study of Saccharomyces cerevisiae by eliminating the dependence on auxotrophic mutations and, because they are phenotypically neutral, avoid the deleterious effects of auxotrophic mutations. We have developed a new dominant resistance marker, dsdAMX4, for use in the genetic manipulation of S. cerevisiae. The dsdA gene, which is derived from Escherichia coli and encodes a D-serine deaminase, confers to S. cerevisiae resistance to D-serine and the ability to use D-serine as a nitrogen source. Here we describe the construction of a dsdAMX4 cassette, capable of expression in S. cerevisiae, and the characterization of this new marker for use in chromosomal gene disruption. The unique selection properties of the dsdAMX4 cassette make it an important addition to the existing array of S. cerevisiae genetic tools.     

汽油喷射发动机电子控制系统

对汽油喷射发动机电子控制系统进行了剖析研究，阐明了电控系统的组成、单片机控制单元的电路特点、控制原理和控制软件。电子控制使汽车发动机的动力性能、经济性和排放污染得到了很大的改善。