In the recent decade, the construction projects related to shallow geothermal energy engineering have undergone rapid development in Shandong Province. The predominant type of these developments and applications was h...In the recent decade, the construction projects related to shallow geothermal energy engineering have undergone rapid development in Shandong Province. The predominant type of these developments and applications was heat exchange through buried tubes and the main targets were residential and office buildings. However, an overwhelming majority of the completed geothermal heat pump projects lacked monitoring devices so that they were unable to comprehensively reflect the background values for the geothermal fields within the province and few researches were conducted on their influence on the geological environment. In this paper, locations for monitoring shallow geothermal energy and their validity of the monitoring point deployment were studied in view of the development and application status as well as geological background conditions of various projects located in multiple cities providing data support for analyzing the fluctuation trend and influence of large-scale shallow geothermal energy applications on the shallow geothermal and the feasibility and parameter designs of newly built systems in Shandong Province in the future.展开更多
In this work, a hardware intrusion detection system （IDS） model and its implementation are introduced to perform online real-time traffic monitoring and analysis. The introduced system gathers some advantages of man...In this work, a hardware intrusion detection system （IDS） model and its implementation are introduced to perform online real-time traffic monitoring and analysis. The introduced system gathers some advantages of many IDSs： hardware based from implementation point of view, network based from system type point of view, and anomaly detection from detection approach point of view. In addition, it can detect most of network attacks, such as denial of services （DOS）, leakage, etc. from detection behavior point of view and can detect both internal and external intruders from intruder type point of view. Gathering these features in one IDS system gives lots of strengths and advantages of the work. The system is implemented by using field programmable gate array （FPGA）, giving a more advantages to the system. A C5.0 decision tree classifier is used as inference engine to the system and gives a high detection ratio of 99.93%.展开更多
1研究背景。大地震往往会带来巨大的人员和财产损失。通过多年的观测、实验和理论研究,科学家们对地震的孕育环境、成核和破裂过程、断层介质性质及其变化等的认识取得显著进步(如Kato and Ben-Zion,2021)。然而,有时在即使知道哪里会...1研究背景。大地震往往会带来巨大的人员和财产损失。通过多年的观测、实验和理论研究,科学家们对地震的孕育环境、成核和破裂过程、断层介质性质及其变化等的认识取得显著进步(如Kato and Ben-Zion,2021)。然而,有时在即使知道哪里会发生大地震的情况下,科学家们仍然无法知道地震到底什么时候会发生(如Hall,2023)。问题的关键是我们还没有发现可靠的地震发生的前兆特征。利用Grace卫星重力观测,通过对Tohoku-Oki地震前后的重力信号分析,Panet等(2018)发现,重力变化很好地展示了本次地震横跨整个断层的形变从深部向浅部迁移的过程。观测显示,重力场在几个月前就开始变化,这种变化与孕震过程基本一致。该研究显示出重力场中可能包含着与地震孕震过程中的物质迁移密切相关的地震短临前兆信号。但是,Tohoku-Oki地震出现的这种重力前兆信号,是否是一种普遍现象,是否会在今后的其他大地震中出现,是一个值得深入研究和探讨的问题。展开更多
针对传统的无线传感器网络监测农田范围小、采样频率不足和能耗高等问题,本文设计了基于簇状结构的无线传感器网络监控系统,能实现对玉米田环境参数的测量。该网络拓扑结构是簇状结构,分为2个簇,8个终端采集节点,2个簇首节点和1个汇聚...针对传统的无线传感器网络监测农田范围小、采样频率不足和能耗高等问题,本文设计了基于簇状结构的无线传感器网络监控系统,能实现对玉米田环境参数的测量。该网络拓扑结构是簇状结构,分为2个簇,8个终端采集节点,2个簇首节点和1个汇聚节点。为延长生存期、降低能耗,节点采用定时休眠,依据节点功能采用不同供电模块,简化协议固定簇內终端节点和簇首的位置。设计WSN-CFM(Corn Field Monitoring)系统能实现近端计算机控制信息采集、处理、传输和存储农田参数变化状况。试验节点部署在玉米田,8个终端节点有7个终端节点数据的传输正确率均超过85%,正确率较低的节点更换电池后可正常工作。系统是能实现稳定传输,适合对玉米田环境参数实时监测。展开更多
针对传统的无线传感器网络监测农田范围小、采样频率不足和能耗高等问题,本文设计了基于簇状结构的无线传感器网络监控系统,能实现对玉米田环境参数的测量。该网络拓扑结构是簇状结构,分为2个簇,8个终端采集节点,2个簇首节点和1个汇聚...针对传统的无线传感器网络监测农田范围小、采样频率不足和能耗高等问题,本文设计了基于簇状结构的无线传感器网络监控系统,能实现对玉米田环境参数的测量。该网络拓扑结构是簇状结构,分为2个簇,8个终端采集节点,2个簇首节点和1个汇聚节点。为延长生存期、降低能耗,节点采用定时休眠,依据节点功能采用不同供电模块,简化协议固定簇內终端节点和簇首的位置。设计WSN-CFM(Corn Field Monitoring)系统能实现近端计算机控制信息采集、处理、传输和存储农田参数变化状况。试验节点部署在玉米田,8个终端节点有7个终端节点数据的传输正确率均超过85%,正确率较低的节点更换电池后可正常工作。系统是能实现稳定传输,适合对玉米田环境参数实时监测。展开更多
基金completed on the basis of Shandong shallow geothermal energy monitoring network construction project (Shandong Land Information Letter [2017]151)Shandong Natural Resources DepartmentNo.801 Hydrogeological Engineering Geological Team of Shandong Provincial Bureau of Geological and Mineral Exploration and Development for their strong support
文摘In the recent decade, the construction projects related to shallow geothermal energy engineering have undergone rapid development in Shandong Province. The predominant type of these developments and applications was heat exchange through buried tubes and the main targets were residential and office buildings. However, an overwhelming majority of the completed geothermal heat pump projects lacked monitoring devices so that they were unable to comprehensively reflect the background values for the geothermal fields within the province and few researches were conducted on their influence on the geological environment. In this paper, locations for monitoring shallow geothermal energy and their validity of the monitoring point deployment were studied in view of the development and application status as well as geological background conditions of various projects located in multiple cities providing data support for analyzing the fluctuation trend and influence of large-scale shallow geothermal energy applications on the shallow geothermal and the feasibility and parameter designs of newly built systems in Shandong Province in the future.
文摘In this work, a hardware intrusion detection system （IDS） model and its implementation are introduced to perform online real-time traffic monitoring and analysis. The introduced system gathers some advantages of many IDSs： hardware based from implementation point of view, network based from system type point of view, and anomaly detection from detection approach point of view. In addition, it can detect most of network attacks, such as denial of services （DOS）, leakage, etc. from detection behavior point of view and can detect both internal and external intruders from intruder type point of view. Gathering these features in one IDS system gives lots of strengths and advantages of the work. The system is implemented by using field programmable gate array （FPGA）, giving a more advantages to the system. A C5.0 decision tree classifier is used as inference engine to the system and gives a high detection ratio of 99.93%.
文摘1研究背景。大地震往往会带来巨大的人员和财产损失。通过多年的观测、实验和理论研究,科学家们对地震的孕育环境、成核和破裂过程、断层介质性质及其变化等的认识取得显著进步(如Kato and Ben-Zion,2021)。然而,有时在即使知道哪里会发生大地震的情况下,科学家们仍然无法知道地震到底什么时候会发生(如Hall,2023)。问题的关键是我们还没有发现可靠的地震发生的前兆特征。利用Grace卫星重力观测,通过对Tohoku-Oki地震前后的重力信号分析,Panet等(2018)发现,重力变化很好地展示了本次地震横跨整个断层的形变从深部向浅部迁移的过程。观测显示,重力场在几个月前就开始变化,这种变化与孕震过程基本一致。该研究显示出重力场中可能包含着与地震孕震过程中的物质迁移密切相关的地震短临前兆信号。但是,Tohoku-Oki地震出现的这种重力前兆信号,是否是一种普遍现象,是否会在今后的其他大地震中出现,是一个值得深入研究和探讨的问题。
文摘针对传统的无线传感器网络监测农田范围小、采样频率不足和能耗高等问题,本文设计了基于簇状结构的无线传感器网络监控系统,能实现对玉米田环境参数的测量。该网络拓扑结构是簇状结构,分为2个簇,8个终端采集节点,2个簇首节点和1个汇聚节点。为延长生存期、降低能耗,节点采用定时休眠,依据节点功能采用不同供电模块,简化协议固定簇內终端节点和簇首的位置。设计WSN-CFM(Corn Field Monitoring)系统能实现近端计算机控制信息采集、处理、传输和存储农田参数变化状况。试验节点部署在玉米田,8个终端节点有7个终端节点数据的传输正确率均超过85%,正确率较低的节点更换电池后可正常工作。系统是能实现稳定传输,适合对玉米田环境参数实时监测。
文摘针对传统的无线传感器网络监测农田范围小、采样频率不足和能耗高等问题,本文设计了基于簇状结构的无线传感器网络监控系统,能实现对玉米田环境参数的测量。该网络拓扑结构是簇状结构,分为2个簇,8个终端采集节点,2个簇首节点和1个汇聚节点。为延长生存期、降低能耗,节点采用定时休眠,依据节点功能采用不同供电模块,简化协议固定簇內终端节点和簇首的位置。设计WSN-CFM(Corn Field Monitoring)系统能实现近端计算机控制信息采集、处理、传输和存储农田参数变化状况。试验节点部署在玉米田,8个终端节点有7个终端节点数据的传输正确率均超过85%,正确率较低的节点更换电池后可正常工作。系统是能实现稳定传输,适合对玉米田环境参数实时监测。
