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A local rainfall-triggered giant landslide occurred in a region along a high-speed railway on the Qinghai‒Tibetan Plateau

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Journal of Mountain Science 2024年第9期21卷 2939-2955页

作者： LI Qingpeng liu Wenhui HE Renjie YING Chunye liu hairui DOU Zengning liu Yabing YANG Sha SONG Xianteng School of Geological Engineering Qinghai UniversityXining 810016China Key Lab of Cenozoic Resource and Environment in North Margin of the Tibetan Plateau Qinghai UniversityXining 810016China College of Eco-Environmental Engineering Qinghai UniversityXining 810016China Qinghai Transportation Planning and Design Institute Co Ltd Xining 810000China Xining Center for Integrated Natural Resources Survey China Geological SurveyXining 810000QinghaiChina

An increasing number of geological hazards along high-speed railways on the Qinghai‒Tibetan Plateau have occurred and have resulted in a profound influence on old infrastructure,which has attracted increasing *** landslide event that occurred on September 15,2022,in Jiujiawan village,Xining city,Qinghai Province,is a typical *** on field investigations and remote sensing interpretations,a comprehensive analysis was conducted on the ***,the potential secondary failure of the current Jiujiawan landslide was assessed using Fast Lagrangian Analysis of Continua in Three Dimensions(FLAC3D).Based on the application of the small baseline subset-interferometric synthetic aperture radar(SBAS-InSAR)technique to SAR images from February 24,2017 to September 14,2022,a significant westward horizontal deformation was found to have been formed prior to the occurrence of the *** maximum annual average deformation rate in the line of sight(LOS)direction reached-45 mm/yr,with a maximum cumulative deformation of-178 *** value was consistent with the continual increase in annual precipitation(2.51 mm/yr)prior to the occurrence of the *** accumulated precipitation before the landslide was 279.8 mm,accounting for 54.2%of the total annual precipitation,with a particularly notable surge in monthly precipitation observed during August(250.3 mm).Additionally,the occurrence of a seismic event with a magnitude of Ms 6.9 in Menyuan County,80 km away from Xining,could be a potential triggering factor to the landslide,as evidenced by an abrupt subsidence alteration observed prior to and following the *** maximum subsidence in the line of sight(LOS)direction exceeded 11 mm,exhibiting a highly consistent spatial distribution with the occurrence range of *** results suggest that the Jiujiawan landslide was likely induced by earthquake events in the early stage and heavy rainfall in the later *** FLAC3D numerical

关键词： Landslide Development characteristic Driver Mudstone Xining Basin

Significant lake expansion has accelerated permafrost degradation on the Qinghai-Tibet Plateau

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Journal of Mountain Science 2024年第1期21卷 68-83页

作者： LI Qingpeng liu Wenhui liu hairui ZHOU Guanghao SONG Xianteng LI Qing LUO Bingnan SONG Bangxu ZHANG Qi Department of Geological Engineering Qinghai UniversityXining 810016China College of Eco-Environmental Engineering Qinghai UniversityXining 810016China Xining Center for Integrated Natural Resources Survey China Geological SurveyXining 810000China

In recent years, lakes on the Qinghai-Tibet Plateau have become more responsive to climate change. In September 2011, Zonag Lake in Hoh Xil experienced sudden drainage, the water eventually flowed into Yanhu Lake, which caused Yanhu Lake to continue to expand. The potential collapse of Yanhu Lake could directly threaten the operational safety of the adjacent Qinghai-Tibet Highway, Qinghai-Tibet Railway. To explore the implications of expanding lakes on the surrounding permafrost, we selected Hoh Xil Yanhu Lake on the Qinghai-Tibet Plateau to study the effect of lake expansion on permafrost degradation. The permafrost degradation in the Yanhu Lake basin from October 2017 to December 2022 was inverted using Sentinel-1 satellite image data and small baseline subset interferometry synthetic aperture radar(SBAS-In SAR) technology. Additionally, permafrost degradation from February 2007 and February 2010 was analyzed using advanced land observing satellite phased array-type L-band synthetic aperture radar(ALOS PALSAR) satellite images and differential interferometric synthetic aperture radar(D-In SAR) technique. The results showed that the permafrost around Yanhu Lake experienced accelerated degradation. Prior to the expansion of Yanhu Lake, the average annual deformation rate along the line of sight(LOS) direction was 6.7 mm/yr. After the expansion, the rate increased to 20.9 mm/yr. The integration of spatial-temporal distribution maps of surface subsidence, Wudaoliang borehole geothermal data, meteorological data, Yanhu Lake surface area changes, and water level changes supports the assertion that the intensified permafrost degradation could be attributed to lake expansion rather than the rising air temperature. Furthermore, permafrost degradation around Yanhu Lake could impact vital infrastructure such as the adjacent Qinghai-Tibet Highway and Qinghai-Tibet Railway.

关键词： Lake expansion SBAS-InSAR D-InSAR Permafrost deformation Qinghai-Tibet Plateau

Neural Network Predictive Control of Variable-pitch Wind Turbines Based on Small-world Optimization Algorithm

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中国电机工程学报 2012年第30期32卷 I0015-I0015,17页

作者： WANG Shuangxin LI Zhaoxia liu hairui School of Mechanical Electronic and Control Engineering Beijing Jiaotong University

通过将混沌映射用于产生初始节点集和进行算子构造,提出一种新的基于实数编码的混沌小世界优化算法。采用4种算法对多例复杂函数的优化问题进行仿真试验,表明所提算法具有能够有效避免陷入局部极小值、快速搜索到最优值的能力。将上述... 详细信息

通过将混沌映射用于产生初始节点集和进行算子构造,提出一种新的基于实数编码的混沌小世界优化算法。采用4种算法对多例复杂函数的优化问题进行仿真试验,表明所提算法具有能够有效避免陷入局部极小值、快速搜索到最优值的能力。将上述方法应用于变桨距风电机组启动并网时的转速控制,提出一种基于混沌小世界优化算法的神经网络预测控制策略,其预测模型由基于现场数据的神经网络模型建立。仿真与实际测试结果表明,该系统可以根据风速扰动提前预测电机的转速变化,使控制器超前动作,保证系统输出跟踪参考轨迹的方向稳步改变,确保风电机组平稳并网。

关键词：优化算法小世界风力发电机组预测控制神经网络变桨距实时编码混沌映射

SnO_(2)/NiO复合半导体纳米纤维的制备及气敏性能研究

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无机材料学报 2021年第9期36卷 950-958页

作者：储宇星刘海瑞闫爽大连工业大学纺织与材料工程学院大连116034 东北大学材料科学与工程学院沈阳110819

采用静电纺丝技术结合化学沉淀法和高温煅烧处理,制备了具有不同Sn含量的SnO_(2)/NiO复合半导体纳米纤维。采用扫描电子显微镜(SEM),X射线衍射仪(XRD)和能量色散X射线光谱仪(EDS)对样品的形貌,结构以及各元素含量进行表征。以乙醇为目... 详细信息

采用静电纺丝技术结合化学沉淀法和高温煅烧处理,制备了具有不同Sn含量的SnO_(2)/NiO复合半导体纳米纤维。采用扫描电子显微镜(SEM),X射线衍射仪(XRD)和能量色散X射线光谱仪(EDS)对样品的形貌,结构以及各元素含量进行表征。以乙醇为目标气体,探究SnO_(2)/NiO纳米纤维的气体传感性质,以及Sn含量对复合纳米纤维气敏性能的影响。研究结果表明,SnO_(2)/NiO复合纳米纤维具有三维网状结构,SnO_(2)复合对NiO纳米纤维的气敏性能具有明显的增强作用。随着SnO_(2)含量的增加,复合纤维对乙醇气体的响应灵敏度增强,其中响应最高的复合纳米纤维在最佳工作温度160℃条件下对体积分数为100×10^(–6)乙醇气体的响应灵敏度为13.4,是NiO纳米纤维最大响应灵敏度的8.38倍。与市面常见的乙醇气体传感器MQ-3相比,SnO_(2)/NiO复合纳米纤维的最佳工作温度更低,响应灵敏度更高,具有一定的实际应用价值。

关键词：氧化镍二氧化锡纳米纤维气敏性能复合材料

Improving the stability of the perovskite solar cells by V2O5 modified transport layer film

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Improving the stability of the perovskite solar cells by V2O...

基于小世界优化的变桨距风电机组神经网络预测控制

第四届新型太阳能电池学术研讨会

作者： Zhiyong liu Tingwei He Huihui Wang Xiaohui Song hairui liu Jien Yang Kaikai liu Heng Ma Department of Physics and Materials Science Henan Normal University

With increasingly improving efficiency of perovskite solar cells(PSCs), top priority has been given to the stability, lifetime, and alternative heavy metal element lead of the ***, on the basis of conventional PSCs, a high-performance device was prepared using a vanadium pentoxide(VO) film to modify the poly(3,4-ethylene dioxy-thiophene)–poly(styrene sulfonate)(PEDOT:PSS) hole transport *** VO modified layer prevents the acidic PEDOT:PSS film from etching the indium tin oxide electrode and maintains the stability of the PSC *** addition, a 4,7-diphenyl-1,10-phenanthroline modified layer prevented the photoactive layer film from coming into direct contact with the Ag electrode to enhance the lifetime of the PSC stored in the *** our study, a stable power conversion efficiency of 15.49% was achieved using this *** to the same type of devices, this type of device exhibited excellent performance and its stability was much higher than that of other device structures when stored in *** modifying the transport layers to enhance the stability and longevity of the PSC, a method is provided for reference for further research.

关键词： Perovskite solar cells V2O5 modified layer High stability

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中国电机工程学报 2012年第30期32卷 105-111+17页

作者：王爽心李朝霞刘海瑞北京交通大学机械与电子控制工程学院

关键词：变桨距风电机组混沌映射小世界优化算法神经网络辨识模型预测控制

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凸曲面拼接模具球头铣刀的瞬时铣削力预测

振动．测试与诊断 2020年第5期40卷 948-956,1025,1026页

作者：吴石张添源刘献礼刘海瑞杨琳哈尔滨理工大学先进制造智能化技术教育部重点实验室哈尔滨150080

在曲面模具拼接区域球头铣刀铣削过程中,刀具载荷变化大,瞬态铣削力有突变现象,影响模具拼接区域的加工精度和表面质量。为了预测拼接区域球头铣刀的瞬态铣削力,首先,建立考虑冲击振动的球头铣刀三维次摆线轨迹方程,得到瞬时未变形切屑... 详细信息

在曲面模具拼接区域球头铣刀铣削过程中,刀具载荷变化大,瞬态铣削力有突变现象,影响模具拼接区域的加工精度和表面质量。为了预测拼接区域球头铣刀的瞬态铣削力,首先,建立考虑冲击振动的球头铣刀三维次摆线轨迹方程,得到瞬时未变形切屑厚度模型;然后,基于铣削微元的思想,建立凸曲面双硬度拼接模具球头铣刀的瞬态铣削力模型,该模型能够综合考虑拼接区冲击振动、硬度变化、刀具工件切触角度变化对瞬态铣削力的影响;最后,进行凸曲面拼接区域球头铣刀铣削加工实验。实验结果表明,预报的瞬态铣削力和实验测量结果在幅值上和变化趋势上具有一致性,在平稳切削时最大铣削力预测误差值基本在15%以内,验证了该模型能有效地预报凸曲面模具拼接区域球头铣刀的瞬态铣削力。

关键词：拼接模具球头刀铣削冲击振动三维次摆线铣削力预测

Construction of Beidou Space time Technology Application Micromajor and Practice of Characteristic new Engineering Education

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Improvement in the performance of inverted planar perovskite solar cells via the CH3NH3PbI3-xClx:ZnO bulk heterojunction

第十四届中国卫星导航年会

作者： Jianping Xing Xingmei Yang Chong Cao Lingguo Meng Yafei Ning hairui liu Shengli Wang School of Microelectronics Shandong University Global New Space Time Information Technology Research Institute Shandong Muke Space Information Technology Co. Ltd School of Oceanography Shandong University of Science and Technology

Beidou is widely used in various industries and fields of economic and social development. It is deeply integrated with big data, the Internet of Things, artificial intelligence and other emerging technologies, promoting the birth of a new business form of "Beidou+micro specialty", and supporting the economic and social digital transformation and improving quality and efficiency. Beidou+micro specialty enables learners to have certain academic and professional qualities and industry employability in this field through flexible and systematic training. The micro specialty has built universal technologies, protocols, standards and systems such as integrated Beidou highperformance antenna, PPP precise single-point positioning, chip and terminal embedded development, integrated navigation, Beidou high-precision satellitebased enhancement[1], Beidou+SoC implementation, Beidou precise time service, Beidou+5G, Beidou+AI, communication gateway cluster, UAV+digital twin processing, space-time security+data encryption, massive space-time data platform+APP processing, and pseudosatellite development frontier, As well as the system of typical cases of Beidou major demonstration projects(Beidou Kinetic Energy Project, Beidou Precision Transportation and Logistics(including high-speed field application), Beidou Precision Scene Monitoring,Beidou Smart Ship, Beidou Precision Agricultural Machinery and Agricultural Internet of Things Project, Beidou Smart Environmental Protection, Beidou Precision Time Service Network, Beidou+Quantum Security Integration,Beidou Police/Civil(such as school bus, tourism guide) Project, Beidou UAV+emergency rescue, etc.). The use of micro specialty mode to achieve more in-depth and efficient interdisciplinary integration can also better enhance the depth and width of talent training, and provide useful reference for the training of compound talents.

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Improvement in the performance of inverted planar perovskite...