基于MFC的传导干扰测试系统设计与实现

该文在传导干扰测试软件设计中采用了目前世界上最先进的软件工程方法和技术实现手段,它基于MFC应用构架,功能完备,易于维护和扩充,代码重用性好,为传导干扰测试提供了全新的技术手段和强有力的工具。     

USB2.0接口芯片CY7C68013的固件程序开发

USB2．0接口技术为外设与主机之间提供了一种灵活高效的双向数据通道。可广泛地应用于数据采集、工业控制和消费数码等方面。本文简要介绍了支持USB2．0协议的接口芯片CY7C68013的结构。分析了CY7C68013芯片的固件程序框架的结构。给出了如何在该固件程序框架下使用C语言进行固件程序开发的方法。     

并行测试技术在自动测试系统中的应用

并行测试拥有减少测试时间、降低测试成本的强大优势,正成为研究热点之一。首先详细分析了并行测试的基本概念,介绍了目前实现并行测试可以采用的两大类4种结构,对这4种结构各自的优缺点进行了比较。接着以多线程并行测试程序为例描述了并行测试程序中同步、异步和单线程的三种模型,最后重点对多线程并行测试实现中几个值得注意的重要问题进行了讨论。     

加强钢丝绳分类研究适应新结构发展变化

针对国内钢丝绳现行标准中分类存在的不足,提出多个原则并存的分类方法。对面接触钢丝绳、压实钢丝绳等类型的产品标准进行详细分析,指出完善的分类原则对钢丝绳的结构设计、制造和使用都有科学的指导作用。     

BR-Mediated Protein S-Nitrosylation Alleviated Low-Temperature Stress in Mini Chinese Cabbage (Brassica rapa ssp. pekinensis)

Brassinosteroids (BRs), a novel plant hormone, are widely involved in plant growth and stress response processes. Nitric oxide (NO), as an important gas signaling molecule, can regulate target protein activity, subcellular localization and function in response to various stresses through post-translational S-nitrosylation modifications. However, the relationship between BR and NO in alleviating low-temperature stress of mini Chinese cabbage remains unclear. The hydroponic experiment combined with the pharmacological and molecular biological method was conducted to study the alleviating mechanism of BR at low temperature in mini Chinese cabbage. The results showed that low temperature inhibited the growth of mini Chinese cabbage seedlings, as evidenced by dwarf plants and yellow leaves. Treatment with 0.05 mg/L BR and 50 µM NO donor S-nitrosoglutathione (GSNO) significantly increased the leaf area, stem diameter, chlorophyll content, dry and fresh weight and proline content. Meanwhile, the malondialdehyde (MDA) content in 0.05 mg/L BR- and 50 µM GSNO-treated leaves were significantly lower than those in other treated leaves under low-temperature conditions. In addition, BR and GSNO applications induced an increase in NO and S-nitrosothiol (SNO) levels in vivo under low-temperature stress. Similarly, spraying BR after the elimination of NO also increased the level of S-nitrosylation in vivo, while spraying GSNO after inhibiting BR biosynthesis decreased the level of NO and SNO in vivo. In contrast, the S-nitrosoglutathione reductase (BrGSNOR) relative expression level and GSNOR enzyme activity were downregulated and inhibited by BR treatment, GSNO treatment and spraying BR after NO clearance, while the relative expression level of BrGSNOR was upregulated and GSNOR enzyme activity was also increased when spraying GSNO after inhibiting BR synthesis. Meanwhile, the biotin switch assay showed that exogenous BR increased the level of total nitrosylated protein in vivo under low-temperature stress. These results suggested that BR might act as an upstream signal of NO, induced the increase of NO content in vivo and then induced the protein S-nitrosylation modification to alleviate the damage of mini Chinese cabbage seedlings under low-temperature stress.     

校企合作模式下电镀人才培养模式的研究

<正>0前言电镀技术不仅能够改善产品的外观,还能够提升产品的表面性能,如耐蚀性、表面强度等。因此,电镀技术已经成为尖端零部件制造行业广泛应用的一项技术。根据我国统计部门的数据,截止到2019年底,我国电镀行业及相关产业的总产值已经超过5 000     

钢结构稳定性设计方法的发展综述及分析

对钢结构稳定性设计方法的研究现状进行较全面的综述。分析相关计算方法存在的缺陷,对稳定性计算部分系数之间的关系进行研究,对高强钢的发展和趋势进行归纳和探讨,指出对高强钢结构稳定性计算的理论和方法进行研究是当务之急。     

僵尸网络的防御与控制

僵尸网络对网络安全运行及用户数据安全都是极具威胁的隐患,它也因此成为一个国际上十分关注的问题.明确僵尸网络的概念,把握僵尸网络的产生、内部工作机理、发展、类型及危险性,就能主动、有效地做好对僵尸网络的防御与控制,强化网络运行及用户数据的安全性.     

企业园区计算机网的安全管理

介绍了企业园区计算机网安全管理系统的基本构成,并对园区网络管理系统的安全防范现状和网络安全的隐患进行了分析。通过结合某企业园区网实际安全防范的实施策略,论述了企业园区计算机网管理系统常用的安全防御方法。     

电场作用下竖直板表面特性对霜层生长的影响

研究了自然对流条件下直流电场对竖直表面上霜晶初始形态的影响,拍摄了不同电场下的霜晶形态,研究发现,在成霜初期,电场越强,冷壁面上形成的水珠越小。当水珠完全冻结后,所形成的冰柱在一定时间内不断增大。在适当的电场下,亲水表面比裸铜表面能够更好地抑制霜层的厚度。对亲水表面结霜质量的研究表明,电场使结霜质量增加,并且结霜质量随着电场的增大而增大。