边长投影变形值归算及其坐标后处理

本文通过边长投影变形值的计算和理论分析,阐述了测量工程在精度要求不同的阶段采用不同的坐标系统及变形值超限后的解决方法。     

基于OpenCV的物体轮廓尺寸测量

针对现有无人快递机器人对于快递物品进行尺寸测量的缺乏,提出了一种基于OpenCV的机器视觉测量方法,通过对图片进行预处理,利用Canny算法进行边缘检测,对物体的轮廓尺寸进行测量。通过添加修正系数对测量系统进行改进,通过前后两次测量数据对比,该测量系统精度得到显著提高,为无人快递机器人提供了更准确的测量方法。     

宁德核电厂石狮鼻人工边坡稳定性分析

从地形地貌、地层岩性、地质构造、地下水及不良地质作用等方面对宁德核电厂一期工程石狮鼻人工边坡的工程地质条件进行了详细分析,采用赤平投影分析的方法评价了石狮鼻人工边坡的稳定性,进而提出边坡设计方案。     

儿童服装的轮廓造型设计艺术

服装的轮廓造型设计艺术是服装设计艺术中最能显现时代特征和流行趋势的因素之一。童装的轮廓造型设计艺术也是童装设计艺术中的第一视觉要素。在设计童装轮廓时不仅要考虑普通服装轮廓造型的设计要素,还要考虑到儿童的体型和生理特征等因素。     

物联网在应急投送保障基地中的应用

简要介绍了物联网的概念、应用以及技术支持。提出了物联网在应急投送保障基地中的应用构想,并指出了在未来应用中可能面临的挑战。     

投资项目风险综合评价研究

投资是面向未来的,有很强的不确定性,具有很大的风险。根据投资项目的特点,从项目系统和非系统风险两方面建立投资项目风险综合评价体系,应用灰色系统理论于投资项目风险评价,对投资项目决策具有指导意义。     

Climate change impacts and its implications on future water resource management in the Meghna Basin

Copious precipitation in the Meghna Basin has remarkable consequences for floods in the north-eastern region of Bangladesh. In addition, due to climate change more frequent extreme precipitation may also increase the frequency and intensity of flash floods. In this study, a hydrologic model H08 has been applied over the basin at a relatively fine grid resolution (10 km). The impacts of climate change are assessed by using the super-high-resolution MRI-AGCM3.2S with A1B scenario through three time-slice experiments; the base-period (1979–2003), the near-future (2015–2039), and the far-future (2075–2099) periods. This study investigates the spatio-temporal changes and the changes in the frequency of precipitation and runoff with different magnitude ranges and finds the implications for water resources management under climate change. Results show that, (a) the projected maximum increment of mean annual precipitation (runoff) is +23% (+34%) and +31% (+39%) during the near-future and the far-future, respectively, (b) the projected increment of median value of monthly discharges at basin outlet is significantly high in wet period (May-July), ranging from 38 to 44% and 25–104% in the near-future and the far-future, respectively. Moreover, the monsoonal peaks are expected to come about 1 ∼ 1.5 month earlier, which ultimately lead to higher possibility of earlier flash flood in the future. This anticipated higher increment in peak discharge as well as future shifting of seasonal cycle of river discharge will have significant implications for agriculture and flood disaster management. Findings will also contribute to enhance water resource management in the basin and improve the design of adaptive measures.     

Credibility estimators with dependence structure over risks and time under balanced loss function

In this paper, we study the Bühlmann credibility model with constant interest rate and equal dependence structure over risks and time under balanced loss function. By means of orthogonal projection, the inhomogeneous and homogeneous credibility premium estimators are derived, which extend those for the existing models to slightly more general versions. Finally, we investigate the estimation of the structure parameters and present a numerical example to show the effectiveness of the inhomogeneous estimator.     

一种线性调频引信抗卷积调制干扰处理方法

作为一种针对脉冲压缩接收机的灵巧干扰信号,卷积调制干扰能够对线性调频引信造 成有效的欺骗干扰效果。为了使引信正常工作,有效抑制卷积干扰,首先通过推导卷积调制 干扰的数学模型,分析了卷积干扰的干扰机理;然后从数学理论上推导了卷积干扰信号与引 信回波信号存在正交的关系特点,提出通过正交投影技术对卷积干扰的抑制方法,在保持有 效回波信号的情况下,对脉内多假目标欺骗干扰产生有效的抑制作用;最后以线性调频脉冲 压缩信号为例进行仿真分析,验证了正交投影技术对卷积调制干扰的有效抗干扰效果。研究 表明正交投影技术能够有效抑制卷积干扰对线性调频引信的干扰。     

People on the verge of death: evidence from impacts of celebrity suicides

We attempt to identify the population who are vulnerable to emotional shocks by exploiting an unprecedented series of celebrity suicides in South Korea during the last decade, including one of the most famous actresses, as well as a former president. Our conservative estimates show that for 5 out of 11 celebrity suicides observed, 1 celebrity suicide on average yielded to more than 10 excessive suicides per day over a time frame of at least 2 weeks. The results indicate that a significant number of people are very much mentally unstable to end their life by emotional shocks that should be irrelevant to their economic status.