无人飞行器在油气输送管道监测系统的应用进展与展望

油气输送管道是现今能源输送的重要工具之一,对油气输送管道的监测是保证其安全输送、预防和降低生态环境破坏的重要环节。无人飞行器在监测领域的应用具有很强的灵活性和适应性,具备了在小到大型空间尺度上获得有价值监测数据的能力,使其正在成为现有油气输送管道监测系统的有力补充。在回顾油气输送管道监测系统发展历程的基础上,通过对现有基于无人飞行器油气输送管道监测应用案例的深入分析,讨论其得以应用的优势与局限性。对无人飞行器监测系统应用配置需考虑的主要因素给出建议,并提出三种无人飞行器用于油气输送管道监测的可行方案,最后对无人飞行器在油气输送管道监测系统的未来应用前景进行展望。     

胶体金免疫层析技术在食品检测中的应用研究

在全球一体化的背景下,社会各界针对食品质量和安全提出了更严格的要求.本文介绍了胶体金免疫层析技术的原理与特点,说明了该技术的应用策略,展望了该技术未来的发展趋势,旨在为该技术在食品检测方面的科学应用提供参考.     

Hygienic quality of cleaning cloths used in professional cleaning of private domestic homes

The objective of this laboratory study was to obtain general background information concerning professional cleaning in private domestic homes. The specific aim was to examine the effect of storage and washing of dirty cloths on their hygienic status. The effect of storage on the number of Staphylococcus aureus bacteria in cleaning cloths was examined using current or potential materials for professional cleaning in private homes. The bacterial content increased in microfibre cloths in some cases during a normal working day (8 h storage), and more clearly after 16 h or 48 h of storage. Disposable fibre cloths did not promote the growth of microbes as well as microfibre cloths. The effect of detergents on the hygienic status of cleaning cloths was unclear: some cleaning agents appeared to enhance the growth of bacteria, while others did not. In many cases, organic substances, i.e. protein added to the cloths, enhanced the growth of microbes. Washing of microfibre cloths at 60°C reduced the numbers of bacteria on the cloths but did not remove them entirely. Storage of dirty cloths before washing will probably cause difficulties in the proper washing of the cloths, and thus negatively affect their capacity for hygienic results in cleaning surfaces, as well as presenting a risk to the safety of the worker. Cleaning cloths should be washed as soon as possible after use: washing after each working day, at the latest, is recommended. Furthermore, cleaning cloths should be selected for professional use to allow washing at hot temperatures. The findings of this study could be used for training in professional home cleaning. They also provide valuable information for other branches of cleaning, including consumer use in households.     

浅析工程建设控制网测量外业成果验算

本文对控制网测量外业成果验算方法总结出一套行之有效的规律,并对平面控制网自动测量数据进行处理,对边角网的正弦条件、余弦条件、极条件检验编写了一个集成的数据处理软件,以减少测量工作者在控制网测量时的数据处理工作量。     

软件安全漏洞挖掘技术的研究

本文首先通过对软件安全漏洞发掘相关技术的研究和分析,针对静态分析和动态分析的优缺点,提出一套比较实用的软件安全漏洞挖掘技术,然后使用该技术对自编的overflow-strepy.exe和no-loop-overflow-strepy.exe两个实际应用程序进行检测,准确的检测出了程序中的漏洞。     

湘东北及湘中部分地区“祖母”称谓的生态考察

运用生态语言学和地理语言学的理论和方法探讨了＂祖母＂称谓在湘东北及湘中部分地区的地理分布和竞争过程,认为该地区较早的祖母称谓是＂婆＂类称谓,其次是＂毑[ia]＂类称谓、＂妈＂类称谓、＂妳妳[ni44.ni]＂和＂爸爸[pa33pa21]＂,再次是＂奶奶[nai55.nai]＂和＂爹[tia]＂类称谓,同时,认为河流对词语的传播与竞争有着不容忽视的影响。     

Past Successes and New Challenges： China＇s Foreign Trade at a Turning Point

Since 1979, China has recorded a remarkable trade performance, which has been driven by international processing and the offshoring strategies of foreign firms. The diversification of Chinese exports and their technological upgrading have been phenomenal However, there is also inertia, illustrated by the persistent dualism of the trade sector, the unrelenting specialization in downmarket products and the deteriorating terms of trade. These weaknesses have helped its partners to adjust to the rise of this new trade power. In the past decade, China＇s economy has faced the adverse effects o fan export-led growth and the global crisis has revealed its vulnerability. China is now forced to rebalance its economy. This will imply major changes in foreign trade, in favor of ordinary trade and away from processing. In the foreseeable future, China is unlikely to become the driver of international demand but will remain the engine of Asian economic integration.     

谈俄语课堂交际中文明礼貌用语的培养

学习语言的目的在于交际,学习外语是为了同外国人进行交际。如何有礼貌地同人交往,这无疑就成为外语教学中一个不可忽视的重要环节。在课堂的言语训练中,要时刻注意培养学生文明礼貌的言语和行为。这对于学习外语的学生来说,今后无论说汉语还是说外语都应体现出应有的素质。     

浅析公差原则

公差原则就是处理尺寸公差与形位公差的关系的原则,这是教学中的难点。为了使学生很好的掌握这部分内容,我利用通俗的语言讲解难理解的公差原则中所涉及到的有关术语与定义,对各种公差要求通过实例、公式和动态公差带图进行详细的分析、对比,把这部分内容化繁为简,收到了比较好的效果。     

自动检测粘贴及整形装置设计应用

介绍了该装置的结构、工作原理及各部件之间的动作配合,创新在于:采用非接触式、环保的箱烟缺条检测算法-二值化算法实现视觉检测功能;能实行智能化粘贴,引入胶带的滚轮组可以根据实际情况调整封箱胶带的松紧程度,保证封箱胶带的粘接强度,不出现褶皱,重叠缺陷等;旋转式程序控制的整形机构使烟箱胶带翘边率降低到1%以下。