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大规模多输入多输出；球面波假设；非稳定性；生灭过程；散射体可见区域法 1

能见度；霾；数字化预测；预防策略 1

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Same stimuli, different responses: a pilot study assessing air pollution visibility impacts on emotional

《环境科学与工程前沿（英文）》 2023年 第17卷 第2期 doi: 10.1007/s11783-023-1620-5

摘要：

● Emotional responses to visibility-reducing haze was assessed in a controlled lab.

关键词： Air pollution     Emotional wellbeing     Variability     Visual exposure     Emotional bias    

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Research on pedestrian escape route without visibility based on Markov chain model

Xiaoping ZHENG, Lijuan DU, Hongjiang WANG,

《化学科学与工程前沿（英文）》 2010年 第4卷 第3期   页码 283-289 doi: 10.1007/s11705-009-0272-8

摘要： It is a pioneering work to use a Markov chain model to study the pedestrian escape route without visibility. In this paper, based on the Markov chain probability transition matrix, the algorithms with random numbers and the spatial-grid, an escape route in a limited invisible space is obtained. Six pace states (standing, crawling, walking, leaping, jogging, and running) are applied to describe the characteristics of pedestrian behaviors. Besides, eight main direction changes are used to describe the transition characteristic of a pedestrian. At the same time, this paper analyzes the escape route from two views, i.e., pedestrian pace states and directions. The research results show that the Markov chain model is more realistic as a means of studying pedestrian escape routes.

关键词： pioneering     direction     spatial-grid     realistic     transition characteristic    

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Turbidity-adaptive underwater image enhancement method using image fusion

《机械工程前沿（英文）》 2022年 第17卷 第3期 doi: 10.1007/s11465-021-0669-8

摘要： Clear, correct imaging is a prerequisite for underwater operations. In real freshwater environment including rivers and lakes, the water bodies are usually turbid and dynamic, which brings extra troubles to quality of imaging due to color deviation and suspended particulate. Most of the existing underwater imaging methods focus on relatively clear underwater environment, it is uncertain that if those methods can work well in turbid and dynamic underwater environments. In this paper, we propose a turbidity-adaptive underwater image enhancement method. To deal with attenuation and scattering of varying degree, the turbidity is detected by the histogram of images. Based on the detection result, different image enhancement strategies are designed to deal with the problem of color deviation and blurring. The proposed method is verified by an underwater image dataset captured in real underwater environment. The result is evaluated by image metrics including structure similarity index measure, underwater color image quality evaluation metric, and speeded-up robust features. Test results exhibit that the method can correct the color deviation and improve the quality of underwater images.

关键词： turbidity     underwater image enhancement     image fusion     underwater robots     visibility    

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霾的预测与预防问题

张 葵

《中国工程科学》 2015年 第17卷 第1期   页码 103-113

摘要：

针对低能见度天气的危害性，运用信息数字方法发现了霾的发生、发展与地热的联系和大气结构特征的改变。霾的预测、预防，需要正确把握近地低空大气的滚流状态和热结构特征。霾的形成既有人为排放也有自然界地热引发地下污染物和污浊气体的释放问题，地热可作为霾天气预报的先兆信息。大气环境的改善，需要人们改进排放技术，也需要研究自然污染源问题。

关键词： 能见度；霾；数字化预测；预防策略    

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基于非稳定性的5G大规模MIMO信道建模 Article

Jian-qiao CHEN, Zhi ZHANG, Tian TANG, Yu-zhen HUANG

《信息与电子工程前沿（英文）》 2017年 第18卷 第12期   页码 2101-2110 doi: 10.1631/FITEE.1700028

摘要： 本文提出一种新型的大规模多输入多输出（massive multiple-input multiple-output, MIMO）通信系统信道模型，同时考虑了球面波假设以及随着天线阵列和时间变化的散射体非稳定特性。由于大规模天线阵列的引入，会导致接收端的不同天线阵子的到达角和多普勒频移不同，因此，采用球面波假设来刻画近场效应。此外，为在接收端刻画不同散射体对天线阵子的可见性，本文提出一种散射体可见区域法同时，对应于理论模型，本文提出了一种有限散射体仿真信道模型。最后，以统计特性作为指标，研究了球面波假设和散射体非稳定性对massive MMO信道模型的影响。研究结果表明，本文提出的信道模型可以很好地刻画massive MIMO信道特性。

关键词： 大规模多输入多输出；球面波假设；非稳定性；生灭过程；散射体可见区域法    

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标题 作者 时间 类型 操作

Same stimuli, different responses: a pilot study assessing air pollution visibility impacts on emotional

期刊论文

Research on pedestrian escape route without visibility based on Markov chain model

Xiaoping ZHENG, Lijuan DU, Hongjiang WANG,

期刊论文

Turbidity-adaptive underwater image enhancement method using image fusion

期刊论文

霾的预测与预防问题

张 葵

期刊论文

基于非稳定性的5G大规模MIMO信道建模

Jian-qiao CHEN, Zhi ZHANG, Tian TANG, Yu-zhen HUANG

期刊论文