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涉众型经济犯罪引发的群体性事件与对策研究 被引量:5
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作者 吴鹏 《河南警察学院学报》 2019年第3期119-124,共6页
涉众型经济犯罪引发的群体性事件类型多种多样,人员组织结构复杂、发起途径多种多样、事件的针对性较强是其显著特征。情报基础工作不到位,部分民警办案能力有待提升,预控机制不健全,忽视进行正面宣传解释,是涉众型经济犯罪引发的群体... 涉众型经济犯罪引发的群体性事件类型多种多样,人员组织结构复杂、发起途径多种多样、事件的针对性较强是其显著特征。情报基础工作不到位,部分民警办案能力有待提升,预控机制不健全,忽视进行正面宣传解释,是涉众型经济犯罪引发的群体性事件的主要成因。为妥善处理涉众型经济犯罪引发的群体性事件,将其所带来的负面影响降到最低,保障人们财产安全,促进社会和谐稳定,有必要构建情报信息网络,提高民警案件侦办能力,建立预控机制,并注重加强正面宣传解释,主动引导舆情走向。 展开更多
关键词 涉众型经济犯罪 群体性事件 情报信息网络 案件侦办能力 预控机制
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Experimental investigation on active acoustic flutter control 被引量:3
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作者 YANG Jun(Institute of Acoustics, Academic Sinica Beijing 100080)(State Key Lab. of Modern Acoustics, Naniing Universitg Naning 210093)HAN Fei QIU Xiaojun and SHA Jiazheng(State Key Lab. of Modern Acoustics, Nanjing Universitg Naning 210093) 《Chinese Journal of Acoustics》 1997年第1期86-92,共7页
Experimenial studies on active acoustic fiutter control are carried out successfully in wind-tunnel after the theoretical study The experdrients verify the theory presented in the reference[1] and give valuable experi... Experimenial studies on active acoustic fiutter control are carried out successfully in wind-tunnel after the theoretical study The experdrients verify the theory presented in the reference[1] and give valuable experimeotal results which predict a prondsing future of applying new techology and new ideas to the area of vibration induced by flow. 展开更多
关键词 Experimental investigation on active acoustic flutter control VI
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The design and experimental investigation of control system for acoustic liner with adjustable impedance
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作者 ZHAO Hongwu SUN Xiaofeng(Beijing University of Aeronautics and Astronautics Beijing 100083) 《Chinese Journal of Acoustics》 1999年第1期70-80,共11页
A kind of new acoustic liner with adjustable impedance has been proposed. At the same time, a set of control system has been designed for this kind of liner. Many experimental results have been obtained based on this ... A kind of new acoustic liner with adjustable impedance has been proposed. At the same time, a set of control system has been designed for this kind of liner. Many experimental results have been obtained based on this control system. In fact, the present investigation shows the possibi1ity of active control of sound absorption coefficient or impedance of a liner according to external sound source condition by means of a standing wave tube. The experimental results show that the sound absorption coefficient of the liner can keep optimal under any sound source condition by controlling the cavity depth and the flow rate through the perforated plate of the liner. In addition, hoth the resistance and the reactance of the liner can also be controlled independently corresponding to any given condition. which is necessary to control unsteady How in turbomachinery. 展开更多
关键词 The design and experimental investigation of control system for acoustic liner with adjustable impedance
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