Effect of H_2 dilution on the structure and properties of nc-CrC/a-C:H coatings deposited by a hybrid beams system

Nanocomposite Cr C/hydrogenated amorphous carbon(nc-CrC/a-C:H) coatings were deposited by a hybrid beams system comprised of a hollow cathode ion source and a cathodic arc ion-plating unit with varying H_2 flow rates. The influences of H_2 flow rates on the morphologies, microstructures, and properties of the coatings were systematically studied. The morphologies and microstructures of the coatings were characterized by SEM, AFM, XPS, Raman spectroscopy, GIXRD, and HRTEM. The mechanical and tribological properties were measured by a nano-indenter, scratch tester, and ball-ondisk tribometer. The wear tracks were evaluated using 3D profilometer, optical microscope, and EDS analysis. It has been found that a moderate H_2 flow rate can effectively smooth the surface, enlarge the fraction of a sp~3 bond, and improve the properties. The coating exhibits the highest hardness and elastic modulus at the H_2 flow rate of 40 sccm. A superior combination of adhesion strength,friction coefficient, and wear resistance can be achieved at the H_2 flow rate of 80 sccm.     

高校思想政治理论课多媒体案例教学法探究

高校思想政治理论课多媒体案例教学法是在信息技术迅猛发展的背景下出现的一种全新的教学方法。通过分析思想政治理论课多媒体案例教学法的优势,并对其应用的特点和注意事项进行了比较详细的举例分析,充分证明了多媒体案例教学法应用于高校思想政治理论课教学必将起到事半功倍的效果。     

On symbolic manipulation and code generation of a hybrid three-dimensional solid element

A symbolic procedure is utilized to derive the analytical expressions of the component matrices resulting to the closed-form integration of a stiffness matrix of a hybrid finite element. In order to alleviate the expression growth problem, we employ special techniques, including the use of symmetry conditions, pattern search, and introduction of intermediate variables, so that the final form of the derived stiffness matrix is suitable for coding implementation. Application of the symbolic procedure is made on a hybrid three-dimensional 8-node solid element. The same procedure is equally applicable to other types of hybrid elements.     

The Use of Distinctive Monoclonal Antibodies in FMD VLP- and P1-Based Blocking ELISA for the Seromonitoring of Vaccinated Swine

The serum neutralization (SN) test has been regarded as the “gold standard” for seroconversion following foot-and-mouth disease virus (FMDV) vaccination, although a high-level biosafety laboratory is necessary. ELISA is one alternative, and its format is constantly being improved. For instance, standard polyclonal antisera have been replaced by monoclonal antibodies (MAbs) for catching and detecting antibodies, and inactive viruses have been replaced by virus-like particles (VLPs). To the best of current knowledge, however, no researchers have evaluated the performances of different MAbs as tracers. In previous studies, we successfully identified site 1 and site 2 MAbs Q10E and P11A. In this study, following the established screening platform, the VLPs of putative escape mutants from sites 1 to 5 were expressed and used to demonstrate that S11B is a site 3 MAb. Additionally, the vulnerability of VLPs prompted us to assess another diagnostic antigen: unprocessed polyprotein P1. Therefore, we established and evaluated the performance of blocking ELISA (bELISA) systems based on VLPs and P1, pairing them with Q10E, P11A, S11B, and the non-neutralizing TSG MAb as tracers. The results indicated that the VLP paired with S11B demonstrated the highest correlation with the SN titers (R² = 0.8071, n = 63). Excluding weakly positive serum samples (SN = 16–32, n = 14), the sensitivity and specificity were 95.65% and 96.15% (kappa = 0.92), respectively. Additionally, the P1 pairing with Q10E also demonstrated a high correlation (R² = 0.768). We also discovered that these four antibodies had steric effects on one another to varying degrees, despite recognizing distinct antigenic sites. This finding indicated that MAbs as tracers could not accurately detect specific antibodies, possibly because MAbs are bulky compared to a protomeric unit. However, our results still provide convincing support for the application of two pairs of bELISA systems: VLP:S11B-HRP and P1:Q10E-HRP.     

分布式实时多媒体数据库的研究与应用

讨论了多媒体数据库的结构 ,对多媒体数据库的实时传输与分布式特性问题分别进行了研究 ,并具体给出了 1个实际的应用实例 .     

循环流化床锅炉点火系统的数值模拟分析

循环流化床(CFB)锅炉点火系统主要以风道燃烧器为主。风道燃烧器在实际运行时,燃油着火和燃尽性能不是很理想,会出现火焰贴壁、壁面结焦等现象,因此对CFB锅炉点火系统进行数值模拟研究。针对内蒙古某电厂CFB锅炉风道燃烧器实际燃烧工况,选用非结构化有限元体积网格模型进行数值模拟。通过对点火系统的数值模拟和实测结果比较分析,验证了针对内蒙古某电厂CFB锅炉点火系统进行理论模拟所设置的物理模型和边界条件是符合实际的,理论模拟和实测结果的相对误差在10%范围内,结果较为理想。说明利用FLUENT软件对点火系统内温度场及压力场的情况进行模拟分析是可行的,对同类电厂具有一定的参考价值。     

数字图像传感器OV6630应用系统中的抖动问题及解决办法

本文介绍了以图像传感器OV6630、CPLD和C8051F单片机等为核心的图像采集系统,通过实验验证了在CPLD与C8051F单片机接口间存在的信号抖动问题.针对这一问题,根据微分电路原理.采用Verilog-HDL语言设计了去抖动模块,解决了图像采集系统的图像失真问题.     

配电自动化系统分析及改进方案

配电网是电力网络中直接面向电力用户的一个环节,是检测供电可靠性的重要部分。配电自动化的广泛应用,为调度运行控制能力、故障处理能力和配网检修能力的提高奠定了基础,也对社会保电活动等提供可信的技术手段和技术措施,极大减少停电次数和停电时间。本文结合西咸新区供电公司成立后的配电网规划,对配电网的发展现状、存在的问题进行分析,并从主站信息和馈电线路方面提出了切实有效的改进方案。