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701.
该文提出了一种方差平稳随机信号的处理方法－－信号分解法。通过信号分解法对待处理信号进行分解,可得到方差平稳随机信号的趋向性序列,其余部分便是方差平稳随机信号中剔除趋向性后的零均值的平稳随机信号,它可用平衡随机信号模型来研究。该方法简单、通用,是处理方差平稳随机信号的一般方法。该方法得到的趋向性序列能更准确地逼近非平稳随机信号的趋向性曲线。 相似文献
702.
703.
分析了国内外ABS树脂生产、消费现状,预测未来几年我国ABS树脂市场发展趋势.建议今后我国ABS树脂行业的发展应以增加生产能力,提高自给率,加大新产品开发力度,调整产品结构,开发生产市场适销对路的产品来满足未来市场发展的需要. 相似文献
704.
趋势面分析法是指对单个或多个变量空间分布的分析方法。文章基于小挠度薄板理论和胡克定律,获取了背斜油藏的构造应力模型;通过趋势面分析法对挠度和主曲率的求解,进行了背斜构造油藏构造应力大小的计算研究,并结合单井资料进行了实例计算。 相似文献
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706.
从轮式工程机械驱动桥结构类型及构成介绍出发,本文阐发了轮式工程机械驱动桥广泛采用自锁式防滑差速器和湿式制动器;发展大轴荷大扭矩的重型桥;部件向标准化、通用化、系列化发展;及采用计算机辅助设计、计算机辅助制造和计算机模拟试验的发展趋势。并介绍了国内外主要驱动桥公司的系列概况。 相似文献
707.
《Journal of Great Lakes research》2023,49(2):357-367
The Aerosol Robotic Network - Ocean Color (AERONET-OC) instrument located at the Pålgrunden site in Lake Vänern provides values of remote sensing spectral reflectance RRS(λ) since 2008. These in situ RRS(λ) indicated a temporal increase from 2015 at center-wavelengths in the green and red spectral regions. To investigate the environmental and climate processes responsible for this increase, water color trends in Lake Vänern were analyzed considering in situ limnological measurements, meteo-climatic quantities and additionally satellite-derived data products from the Moderate Resolution Imaging Spectroradiometer on board the Aqua platform (MODIS-A). Satellite ocean color RRS(λ) data assessed against in situ RRS(λ) from the Pålgrunden site showed satisfactory agreement at a number of spectral bands. Relying on these validation results, comprehensive statistical analysis were performed using MODIS-A RRS(λ). These indicated periodical changes between 2002 and 2021 with clear minima occurring between 2010 and 2013. The complementary analyses of temporal changes characterizing limological and meteo-climatic quantities, and also relationships between these quantities and RRS(λ), indicated the existence of complex and concurrent bio-geochemical processes influencing water color in Lake Vänern. In particular, significant correlations were observed between RRS(λ) and turbidity, and also between RRS(λ) and total biovolume. Additionally, an early warming of Lake Vänern surface waters was identified since spring 2014. This occurrence could potentially affect the vertical mixing and water exchange between turbid coastal and pelagic waters with implications for phytoplankton phenology. 相似文献
708.
The rapid growth of user interactions in social media sites gives useful insights in many areas. Facebook is the most popular social media site lately, with the highest number of active users, which is a valuable and hassle-free source in obtaining data. Despite its enthusiastic nature, it is a mere fact that people use Facebook to gain instant updates on the current state of affairs. The ability of getting updates from several sources of news channels in a single user news feed, the extreme ease of providing feedbacks on those news posts using gesture-based reactions, send and share messages among people are some of the main reasons for its increasing popularity in the perspective of attaining news. Politics has always been a ubiquitous topic in the world. Sri Lanka was in a war on terrorism for nearly three decades, followed by a governance (2005–2015) led by the same political party which was alleged for autocracy and lasted for nearly a decade has influenced the citizens’ political conviction heavily. On such a background, the “Good-Governance” (2015–2019) which is a coalition government, trounced the ruling government at the presidential election held by then, which they claimed to direct Sri Lanka towards a sustainable, stable, responsible and moral society with necessary constitutional amendments guaranteeing democracy to all ethnic groups eradicating corruption, wastage and fraud. The interest and motivation of this study builds up to discover whether there are any significant trends in the Sri Lankan political context following this transformation, in the perspective of the general public. Facebook user reactions on news posts have been used for this study as the data source. The analysis of this study reveals an increasing trend of user reactions in politics from 2011 to 2018. Further, it is identified that the present government (2015–2019) has a decreasing trend of user reactions over the past years (2011–2015) in the sight of its citizens, although they pledged for a better governance. On the contrary, the previous government has an increasing trend even though they were overpowered by the “Good-Governance” for its alleged unscrupulous ruling. 相似文献
709.
大学校园规划设计的新趋势 总被引：5，自引：1，他引：5
教育改革,对大学校园的规划设计提出了许多新要求,文章从功能,布局等诸多方面阐述和分析了大学校园规划设计的新趋势。 相似文献
710.
倪莉亚 《安徽冶金科技职业学院学报》2012,22(1):95-98
在企业发展的历程中,女工工作如何创新,如何履行好职责,如何做到女职工信得过、企业管理的好帮手,是新时期摆在女工组织面前急待解决的问题。面对我们面临的现状和困难,我们要从深入学习,提高理论水平、调查研究。把握思想脉搏、与时俱进,勇于突破创新、尊重基层,重视创造实践、发挥优势,多方激励女工等五个途径去寻求解决办法。 相似文献