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Energy efficiency aware dynamic rate and power adaptation in carrier sensing based WLANs under Rayleigh fading and shadowing
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作者 Md.Forkan Uddin 《Digital Communications and Networks》 SCIE CSCD 2024年第4期918-933,共16页
We consider the problem of energy efficiency aware dynamic adaptation of data transmission rate and transmission power of the users in carrier sensing based Wireless Local Area Networks(WLANs)in the presence of path l... We consider the problem of energy efficiency aware dynamic adaptation of data transmission rate and transmission power of the users in carrier sensing based Wireless Local Area Networks(WLANs)in the presence of path loss,Rayleigh fading and log-normal shadowing.For a data packet transmission,we formulate an optimization problem,solve the problem,and propose a rate and transmission power adaptation scheme with a restriction methodology of data packet transmission for achieving the optimal energy efficiency.In the restriction methodology of data packet transmission,a user does not transmit a data packet if the instantaneous channel gain of the user is lower than a threshold.To evaluate the performance of the proposed scheme,we develop analytical models for computing the throughput and energy efficiency of WLANs under the proposed scheme considering a saturation traffic condition.We then validate the analytical models via simulation.We find that the proposed scheme provides better throughput and energy efficiency with acceptable throughput fairness if the restriction methodology of data packet transmission is included.By means of the analytical models and simulations,we demonstrate that the proposed scheme provides significantly higher throughput,energy efficiency and fairness index than a traditional non-adaptive scheme and an existing most relevant adaptive scheme.Throughput and energy efficiency gains obtained by the proposed scheme with respect to the existing adapting scheme are about 75%and 103%,respectively,for a fairness index of 0.8.We also study the effect of various system parameters on throughput and energy efficiency and provide various engineering insights. 展开更多
关键词 Carrier sense multiple access Energy efficiency Fading and shadowing Rate and power adaptation THROUGHPUT Wireless local area networks
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A More Efficient Approach for Remote Sensing Image Classification
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作者 Huaxiang Song 《Computers, Materials & Continua》 SCIE EI 2023年第3期5741-5756,共16页
Over the past decade,the significant growth of the convolutional neural network(CNN)based on deep learning(DL)approaches has greatly improved the machine learning(ML)algorithm’s performance on the semantic scene clas... Over the past decade,the significant growth of the convolutional neural network(CNN)based on deep learning(DL)approaches has greatly improved the machine learning(ML)algorithm’s performance on the semantic scene classification(SSC)of remote sensing images(RSI).However,the unbalanced attention to classification accuracy and efficiency has made the superiority of DL-based algorithms,e.g.,automation and simplicity,partially lost.Traditional ML strategies(e.g.,the handcrafted features or indicators)and accuracy-aimed strategies with a high trade-off(e.g.,the multi-stage CNNs and ensemble of multi-CNNs)are widely used without any training efficiency optimization involved,which may result in suboptimal performance.To address this problem,we propose a fast and simple training CNN framework(named FST-EfficientNet)for RSI-SSC based on an EfficientNetversion2 small(EfficientNetV2-S)CNN model.The whole algorithm flow is completely one-stage and end-to-end without any handcrafted features or discriminators introduced.In the implementation of training efficiency optimization,only several routine data augmentation tricks coupled with a fixed ratio of resolution or a gradually increasing resolution strategy are employed,so that the algorithm’s trade-off is very cheap.The performance evaluation shows that our FST-EfficientNet achieves new state-of-the-art(SOTA)records in the overall accuracy(OA)with about 0.8%to 2.7%ahead of all earlier methods on the Aerial Image Dataset(AID)and Northwestern Poly-technical University Remote Sensing Image Scene Classification 45 Dataset(NWPU-RESISC45D).Meanwhile,the results also demonstrate the importance and indispensability of training efficiency optimization strategies for RSI-SSC by DL.In fact,it is not necessary to gain better classification accuracy by completely relying on an excessive trade-off without efficiency.Ultimately,these findings are expected to contribute to the development of more efficient CNN-based approaches in RSI-SSC. 展开更多
关键词 FST-efficientNet efficient approach scene classification remote sensing deep learning
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Evaluating the Conservation Efforts of Multi-Projects Using Remote Sensing and Light Use Efficiency Model: A Case of Nyungwe Forest National Park, Rwanda
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作者 Evariste Rutebuka Lixiao Zhang +2 位作者 Ernest Frimpong Asamoah Emmanuel Rukundo Apollinaire William 《Open Journal of Forestry》 2018年第1期68-86,共19页
This paper investigates the effectiveness of conservation efforts in the Nyungwe Forest National Park (Nyungwe). The forest is one of the six key landscapes identified for conservation in the Albertine Rift because it... This paper investigates the effectiveness of conservation efforts in the Nyungwe Forest National Park (Nyungwe). The forest is one of the six key landscapes identified for conservation in the Albertine Rift because it hosts many threatened species. As such, a number of different stakeholders have been involved in its conservation since 1987;yet, studies that emphasize and evaluate the success of these conservation efforts are limited. We combined a rapid and relatively low cost remotely-sensed data and the Light Use Efficiency model to generate forest conservation indicators such as NDVI, forest canopy Net Primary Productivity and carbon sequestered from 1986 to 2010. The influence of topographic and climatic factors on these indicators was examined. The supervised classifier was used to catalogue the area into Forest, Wetland, and Bareland. The forest was the major category (above 90%) of Nyungwe relative to wetland and bareland. Based on degradation intensity, two distinctive periods were realised;the first period spans 8 years (1986-1994) whereas the second spans 16 years (1994-2010). The former degradation intensity period is 10 times higher than the latter period. Although the size of forest recovered up to 90%, the daily NPP and carbon sequestration capacity decreased by 37.1% (i.e. NPP 6.5 Mg tons in 1986 to 4.1 Mg tons in 2010). Areas of the forest that are physically constrained (high altitude) had a higher degradation. Guided by our indicators, there is an overall success in conservation efforts, but efforts were mostly concentrated in accessible areas. Therefore, conservation efforts that aim to respond to degradation of the inaccessible areas of the forest should be stressed in the management plan of the park. 展开更多
关键词 CONSERVATION EFFORTS FOREST CANOPY COVER Light Use efficiency MODEL Remote sensing Nyungwe Rwanda
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Joint Optimal Energy-Efficient Cooperative Spectrum Sensing and Transmission in Cognitive Radio 被引量:3
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作者 Weizhi Zhong Kunqi Chen Xin Liu 《China Communications》 SCIE CSCD 2017年第1期98-110,共13页
In order to improve the energy efficiency(EE) in cognitive radio(CR), a joint optimal energy-efficient cooperative spectrum sensing(CSS) and transmission in multi-channel CR is proposed in this paper. EE is described ... In order to improve the energy efficiency(EE) in cognitive radio(CR), a joint optimal energy-efficient cooperative spectrum sensing(CSS) and transmission in multi-channel CR is proposed in this paper. EE is described as a tradeoff between the throughput and the entirely consumed power. A joint optimization problem is formulated to maximize EE by jointly optimizing local sensing time, number of cooperative sensing secondary users(SU), transmission bandwidth and power. A combined optimization algorithm of bi-level optimization, Polyblock optimization and Dinkelbach's optimization is proposed to solve the proposed non-convex optimization problem effectively. The simulation results show that, compared with throughput maximization model(TMM), the energy efficiency maximization model(EEMM) improves EE of the CR system and limits the excessive power consumption effectively. 展开更多
关键词 cognitive radio energy efficiency cooperative spectrum sensing THROUGHPUT
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Efficient Solution to Electromagnetic Scattering Problems of Bodies of Revolution by Compressive Sensing 被引量:1
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作者 孔勐 陈明生 +2 位作者 张量 曹欣远 吴先良 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第1期136-139,共4页
Under the theory structure of compressive sensing (CS), an underdetermined equation is deduced for describing the discrete solution of the electromagnetic integral equation of body of revolution (BOR), which will ... Under the theory structure of compressive sensing (CS), an underdetermined equation is deduced for describing the discrete solution of the electromagnetic integral equation of body of revolution (BOR), which will result in a small-scale impedance matrix. In the new linear equation system, the small-scale impedance matrix can be regarded as the measurement matrix in CS, while the excited vector is the measurement of unknown currents. Instead of solving dense full rank matrix equations by the iterative method, with suitable sparse representation, for unknown currents on the surface of BOR, the entire current can be accurately obtained by reconstructed algorithms in CS for small-scale undetermined equations. Numerical results show that the proposed method can greatly improve the computgtional efficiency and can decrease memory consumed. 展开更多
关键词 of in IS on by BOR efficient Solution to Electromagnetic Scattering Problems of Bodies of Revolution by Compressive sensing
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Energy Efficiency-Based Decision Making in Cognitive Radio Networks
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作者 Hongning Li Qingqi Pei Leilei Xu 《China Communications》 SCIE CSCD 2016年第11期205-213,共9页
As a constraint for smart devices,energy consumption has attract people's attention for a long time period. How to get higher resource utilization with less energy consumption is a challenge for cognitive radio ne... As a constraint for smart devices,energy consumption has attract people's attention for a long time period. How to get higher resource utilization with less energy consumption is a challenge for cognitive radio networks. Secondary users have to participate in spectrum sensing at the cost of energy and access idle spectrum without interfering primary users. However,not all participating secondary users can access idle spectrum. How to ensure the participation users access spectrum efficiently with a larger probability is an urgent problem to be solved. We propose an Energy Efficiency-based Decision Making(EEDM) for cognitive radio networks,which fully considers residual energy and probability of obtaining spectrum resources. Simulation and analysis show that the proposed scheme can maximize proportion of allocated users under the premise of ensuring the accuracy of spectrum sensing,then balance users' energy consumption and access efficiency,so as to effectively improve the utilization of spectrum resources. 展开更多
关键词 cognitive radio networks spectrum sensing energy efficiency decision making
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Characterization of Regional Combustion Efficiency usingΔXCO:ΔXCO_(2)Observed by a Portable Fourier-Transform Spectrometer at an Urban Site in Beijing
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作者 Ke CHE Yi LIU +5 位作者 Zhaonan CAI Dongxu YANG Haibo WANG Denghui JI Yang YANG Pucai WANG 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2022年第8期1299-1315,共17页
Measurements of column-averaged dry-air mole fractions of carbon dioxide and carbon monoxide,CO_(2)(XCO_(2))and CO(XCO),were performed throughout 2019 at an urban site in Beijing using a compact Fourier Transform Spec... Measurements of column-averaged dry-air mole fractions of carbon dioxide and carbon monoxide,CO_(2)(XCO_(2))and CO(XCO),were performed throughout 2019 at an urban site in Beijing using a compact Fourier Transform Spectrometer(FTS)EM27/SUN.This data set is used to assess the characteristics of combustion-related CO_(2)emissions of urban Beijing by analyzing the correlated daily anomalies of XCO and XCO_(2)(e.g.,ΔXCO andΔXCO_(2)).The EM27/SUN measurements were calibrated to a 125HR-FTS at the Xianghe station by an extra EM27/SUN instrument transferred between two sites.The ratio ofΔXCO overΔXCO_(2)(ΔXCO:ΔXCO_(2))is used to estimate the combustion efficiency in the Beijing region.A high correlation coefficient(0.86)betweenΔXCO andΔXCO_(2)is observed.The CO:CO_(2)emission ratio estimated from inventories is higher than the observedΔXCO:ΔXCO_(2)(10.46±0.11 ppb ppm^(−1))by 42.54%-101.15%,indicating an underestimation in combustion efficiency in the inventories.DailyΔXCO:ΔXCO_(2)are influenced by transportation governed by weather conditions,except for days in summer when the correlation is low due to the terrestrial biotic activity.By convolving the column footprint[ppm(μmol m-2 s-1)-1]generated by the Weather Research and Forecasting-X-Stochastic Time-Inverted Lagrangian Transport models(WRF-X-STILT)with two fossil-fuel emission inventories(the Multi-resolution Emission Inventory for China(MEIC)and the Peking University(PKU)inventory),the observed enhancements of CO_(2)and CO were used to evaluate the regional emissions.The CO_(2)emissions appear to be underestimated by 11%and 49%for the MEIC and PKU inventories,respectively,while CO emissions were overestimated by MEIC(30%)and PKU(35%)in the Beijing area. 展开更多
关键词 FTS remote sensing ΔXCO:ΔXCO_(2) combustion efficiency MEGACITY
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Polish Teachers in Changing Reality
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作者 Olga Wyzga Anna Mroz 《Sino-US English Teaching》 2018年第6期284-295,共12页
Authors of the text present Polish context of teachers’ professional promotion and teachers’ competencies. The text also has its empirical dimension-a research about teachers’ sense of life quality has been done. T... Authors of the text present Polish context of teachers’ professional promotion and teachers’ competencies. The text also has its empirical dimension-a research about teachers’ sense of life quality has been done. There are teachers’ expressions, collected and quoted during qualitative research. Teachers’ thoughts are concerned about the sense of life quality in the context of working at lower secondary school. 展开更多
关键词 the sense of teachers life quality teacher teachers promotion teachers competencies lifelong education?
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On the Low-Efficiency in College English Teaching In China
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作者 高学军 《科技信息》 2010年第36期I0132-I0134,共3页
Great changes have taken place in college English teaching in China in recent decades.Different teaching theories have been introduced into English teaching in many colleges and universities.However,college English,as... Great changes have taken place in college English teaching in China in recent decades.Different teaching theories have been introduced into English teaching in many colleges and universities.However,college English,as one of the required courses,is faced with a lot of complaints and criticism from the students and teachers as well as the society.The low efficiency in college English teaching is one of the problems,which attract the attention of all those concerned.It is of great significance to find out why students spend so much time,money and energy on English learning but are still at loss how to use English for communication.Surely,teaching and learning English is not an easy job.It involves a number of complicated interrelated factors.The article is meant to discuss the factors that are closely related to the low-efficiency in college English teaching in china,such as education notion,usage of textbooks,teacher quality as well as students motivations,aiming to make people have a clear idea of the problem so that some things can be done to improve the quality and efficiency of college English teaching in China. 展开更多
关键词 中国 英语 高校 学习方法
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Design of Clustering Techniques in Cognitive Radio Sensor Networks
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作者 R.Ganesh Babu D.Hemanand +1 位作者 V.Amudha S.Sugumaran 《Computer Systems Science & Engineering》 SCIE EI 2023年第1期441-456,共16页
In recent decades,several optimization algorithms have been developed for selecting the most energy efficient clusters in order to save power during trans-mission to a shorter distance while restricting the Primary Us... In recent decades,several optimization algorithms have been developed for selecting the most energy efficient clusters in order to save power during trans-mission to a shorter distance while restricting the Primary Users(PUs)interfer-ence.The Cognitive Radio(CR)system is based on the Adaptive Swarm Distributed Intelligent based Clustering algorithm(ASDIC)that shows better spectrum sensing among group of multiusers in terms of sensing error,power sav-ing,and convergence time.In this research paper,the proposed ASDIC algorithm develops better energy efficient distributed cluster based sensing with the optimal number of clusters on their connectivity.In this research,multiple random Sec-ondary Users(SUs),and PUs are considered for implementation.Hence,the pro-posed ASDIC algorithm improved the convergence speed by combining the multi-users clustered communication compared to the existing optimization algo-rithms.Experimental results showed that the proposed ASDIC algorithm reduced the node power of 9.646%compared to the existing algorithms.Similarly,ASDIC algorithm reduced 24.23%of SUs average node power compared to the existing algorithms.Probability of detection is higher by reducing the Signal-to-Noise Ratio(SNR)to 2 dB values.The proposed ASDIC delivers low false alarm rate compared to other existing optimization algorithms in the primary detection.Simulation results showed that the proposed ASDIC algorithm effectively solves the multimodal optimization problems and maximizes the performance of net-work capacity. 展开更多
关键词 Adaptive swarm distributed clustering cognitive radio clustering algorithm distributed swarm intelligent energy efficient distributed cluster-based sensing multi modal optimization
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乡村青年教师获得感指标体系构建研究 被引量:1
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作者 韩悦 周正 周静 《教师教育学报》 2024年第2期77-87,共11页
作为乡村教师队伍的后备力量与持续动力,乡村青年教师承担着振兴乡村教育发展的重任。切实的获得感是增进乡村教师职业吸引力、坚定乡村青年教师教育信念的关键因素,也是建设高质量乡村教师队伍的根本保障。研究通过修正德尔菲法与层次... 作为乡村教师队伍的后备力量与持续动力,乡村青年教师承担着振兴乡村教育发展的重任。切实的获得感是增进乡村教师职业吸引力、坚定乡村青年教师教育信念的关键因素,也是建设高质量乡村教师队伍的根本保障。研究通过修正德尔菲法与层次分析法建构了包含“生存保障获得感”“关系归属获得感”“自我发展获得感”3个一级指标、“物质经济获得感”“政策保障获得感”“社会交往获得感”“公共文化获得感”“社会声望获得感”“专业成长获得感”“职业成就获得感”7个二级指标及28个相应三级指标的乡村青年教师获得感指标体系。在此基础上提出乡村青年教师获得感提升理路:完善物质保障,推进差异化教师激励政策;整合关系归属,锚定人性化社会需要;保持自我发展,合理规划未来预期。 展开更多
关键词 乡村教师 青年教师 获得感 指标体系 德尔菲法 层次分析法
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守正与创新:基于获得感理论打造现代测量学高效课堂 被引量:1
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作者 张静 邓超 +1 位作者 邓勇 范百兴 《测绘通报》 CSCD 北大核心 2024年第S01期312-316,共5页
面对人工智能时代波涛汹涌的高等教育革命,现代测量学教学在遵循测量专业人才培养规律的基础上,如何在传承中创新,在创新中传承,达到守正与创新的有机统一,是本课程教学改革过程中必须解决的问题。本文以新一轮本科教育教学改革为契机,... 面对人工智能时代波涛汹涌的高等教育革命,现代测量学教学在遵循测量专业人才培养规律的基础上,如何在传承中创新,在创新中传承,达到守正与创新的有机统一,是本课程教学改革过程中必须解决的问题。本文以新一轮本科教育教学改革为契机,以社会经济发展对测绘地理信息行业领域的新需求为导向,面向现有课程教学存在的痛点,从教学内容、教学方法、教学组织等方面深入探索,提出了强化时代主题融入、提升学生课程获得感、培养工程素养和回归朴素课堂等四项教学改革措施。并采取BOPPPS教学模式构建理论教学,基于获得感理论,打造了“四度”高效课堂,极大地满足了测绘专业学生综合能力提升的需求。 展开更多
关键词 现代测量学 守正创新 学生获得感 高效课堂 教学改革
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6G通感算智融合架构和场景赋能探索 被引量:1
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作者 王卫斌 周建锋 毛磊 《移动通信》 2024年第3期21-25,共5页
面向未来移动通信领域的无人机识别、脑机协同、XR、工业协作机器人等新兴移动业务场景,移动网络将成为集感知、计算和智能多要素能力于一体的创新平台,满足创新在移动网络基础设备内部实施。阐述了移动通信网络由5G向6G演进过程中,因... 面向未来移动通信领域的无人机识别、脑机协同、XR、工业协作机器人等新兴移动业务场景,移动网络将成为集感知、计算和智能多要素能力于一体的创新平台,满足创新在移动网络基础设备内部实施。阐述了移动通信网络由5G向6G演进过程中,因为新兴的业务需求驱动,形成了通感融合、通智融合和通算融合领域技术分支,提出了一种6G通感算智一体化的架构,具备快速动态加载通感算智各种原子能力,实现多要素能力智能调度。并在此基础上,探讨了该架构在无人机识别和XR沉浸式通信两个典型应用场景的应用,以达到服务边界拓展和整体系统效率优化。 展开更多
关键词 6G 通感算智一体化 智能调度 无人机 XR 系统效率优化
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我国民族地区幼儿园组织支持对教师工作旺盛感影响的实证研究——教师基本心理需求的中介作用 被引量:1
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作者 蔡迎旗 张丽莹 《教育文化论坛》 2024年第3期48-61,共14页
幼儿园教师工作旺盛感是幼儿园教师工作中的活力感和学习感的综合体现。本研究以宁夏回族自治区20所幼儿园的614名教师为调查对象,综合运用描述性统计、相关分析、回归分析以及结构方程模型等方法,分析幼儿园组织支持对幼儿园教师工作... 幼儿园教师工作旺盛感是幼儿园教师工作中的活力感和学习感的综合体现。本研究以宁夏回族自治区20所幼儿园的614名教师为调查对象,综合运用描述性统计、相关分析、回归分析以及结构方程模型等方法,分析幼儿园组织支持对幼儿园教师工作旺盛感的影响效应以及幼儿园教师的基本心理需求在影响效应中的中介作用。研究结果表明:幼儿园教师工作旺盛感整体较强;教师的基本心理需求能够显著预测教师的工作旺盛感,并在幼儿园组织支持对教师工作旺盛感的影响机制中产生中介效应。为了促进幼儿园教师工作旺盛感的提升,幼儿园亟须给予幼儿园教师充裕的物质保障,制定合理的幼儿园教师管理制度,营造良好的学习气氛与和谐的人际环境。 展开更多
关键词 幼儿园教师 工作旺盛感 组织支持 基本心理需求 影响机制
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高职院校发挥社会服务功能的现实困境及效能优化路径 被引量:1
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作者 吴智峰 《天津中德应用技术大学学报》 2024年第1期90-95,共6页
职教改革背景下社会服务已经成为衡量高职院校办学质量、发展水平的重要指标。当前高职院校社会服务呈现出服务范围地域性明显、服务内容以基础实践为主的特点。针对高职院校社会服务师资综合能力不强、组织执行机制不完善、外部环境支... 职教改革背景下社会服务已经成为衡量高职院校办学质量、发展水平的重要指标。当前高职院校社会服务呈现出服务范围地域性明显、服务内容以基础实践为主的特点。针对高职院校社会服务师资综合能力不强、组织执行机制不完善、外部环境支持认可不高等现实困境,应采取组建混编“链上师资团”,打造技能大师工作品牌,创新多元主体社会服务模式;制定“年度社会服务专项规划”,创设专职机构,挑选辅助机构,强化社会服务执行力度;深入工作场景,拓展志愿服务,匹配区域特色优化专业布局,营造良好场域环境,提升高职院校社会服务公众认知度等措施。 展开更多
关键词 高职院校 链上师资团 社会服务专项规划 效能优化
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STAR-RIS辅助通信感知一体化的多用户安全通信
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作者 郝万明 宋亚飞 孙钢灿 《电讯技术》 北大核心 2024年第10期1621-1627,共7页
智能反射面在提高通信感知一体化系统性能和增强物理层安全方面具有极大潜力,但是其存在半空间覆盖的缺点。为此,研究了一种同时反射和透射智能反射面,并在考虑感知目标的信噪比约束条件下,建立一个联合优化基站发射波束赋形和智能反射... 智能反射面在提高通信感知一体化系统性能和增强物理层安全方面具有极大潜力,但是其存在半空间覆盖的缺点。为此,研究了一种同时反射和透射智能反射面,并在考虑感知目标的信噪比约束条件下,建立一个联合优化基站发射波束赋形和智能反射面相移的安全能效最大化问题。为求解所赋形的非凸优化问题,用Dinkelbach方法将目标函数转化为减法形式,并将该为题转化为两个子问题来解耦发射波束赋形和反射面相移,进而提出基于连续凸近似、半正定松弛的交替优化算法来求解。仿真结果表明,与传统的分组智能反射面场景相比,该方案能够提升25.6%的系统能效。 展开更多
关键词 通信感知一体化(ISAC) 智能反射面(IRS) 物理层安全 安全能效最大化
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黄河下游高效输沙指标及输沙水量研究
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作者 李小平 田勇 +1 位作者 张翠萍 王方圆 《泥沙研究》 CAS CSCD 北大核心 2024年第4期34-41,共8页
研究提出黄河下游高效输沙的定义和内涵,依据小浪底水库运用方式和黄河不同时段河道水量的功能定位,将汛期的洪水水量定义为狭义输沙水量,汛期的平水期和非汛期水量的主要功能为满足生态、灌溉、发电等需求,不作为输沙水量。建立了单位... 研究提出黄河下游高效输沙的定义和内涵,依据小浪底水库运用方式和黄河不同时段河道水量的功能定位,将汛期的洪水水量定义为狭义输沙水量,汛期的平水期和非汛期水量的主要功能为满足生态、灌溉、发电等需求,不作为输沙水量。建立了单位输沙水量与排沙比及流量含沙量之间的定量关系,提出了高效输沙流量和含沙量指标的定量计算方法,在现状下游河道过流能力条件下,计算了满足高效输沙要求的流量与含沙量搭配指标。提出了维持下游河道全年一定冲淤水平的利津断面狭义输沙水量计算方法,当进入下游年沙量为3亿t时,维持下游河道全年冲淤平衡的利津断面洪水输沙水量为56.2亿~69.6亿m^(3)。 展开更多
关键词 高效输沙指标 单位输沙水量 狭义输沙水量 黄河下游
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转化与实化:基层开展铸牢中华民族共同体意识教育的关键
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作者 严庆 《学术探索》 CSSCI 2024年第8期52-57,共6页
铸牢中华民族共同体意识教育是重要的意识形态教育,也是型塑国家软实力的系统工程。基层是社会建设的基础,面向基层的“铸牢”教育需要增强浸润性、渗透性,需要将教育内容、话语化虚为实、化大为小、化高为低。社会是普罗大众的群体组织... 铸牢中华民族共同体意识教育是重要的意识形态教育,也是型塑国家软实力的系统工程。基层是社会建设的基础,面向基层的“铸牢”教育需要增强浸润性、渗透性,需要将教育内容、话语化虚为实、化大为小、化高为低。社会是普罗大众的群体组织,也是中华民族共同体意识生成、传播、弘扬的空间场域和人际网络载体。基层“铸牢”教育是言传身教、氛围营造、典型示范的结合。基层“铸牢”教育的目的就是要将各民族永远在一起的认知、价值、规约普及成“心照不宣”“人心所向”的共识,并转化为人们的规则与行动。 展开更多
关键词 基层 铸牢中华民族共同体意识 社会教育 效能
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数字化赋能高校思政教学效果评价研究
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作者 邵冬梅 《黑龙江科学》 2024年第15期132-134,共3页
为提升数字化赋能下高校思政教学效果,以效果评价为导向,运用文献研究法、调查法及统计分析法构建数字化赋能高校思政教学效果评价模型,并通过问卷调查收集200份数据进行验证。经t检验、探索性因子分析及验证性因子分析发现,由教师数字... 为提升数字化赋能下高校思政教学效果,以效果评价为导向,运用文献研究法、调查法及统计分析法构建数字化赋能高校思政教学效果评价模型,并通过问卷调查收集200份数据进行验证。经t检验、探索性因子分析及验证性因子分析发现,由教师数字化教学效果评价、学生数字化学习效果评价及大数据教学效果评价构成的评价模型结果十分显著,建构合理。经多元回归分析发现,学校理念、数字技能及师生互评是影响数字化赋能下高校思政教学效果评价的三个重要因素。高校要重视数字化转型,加强对师生数字素养的培育,完善师生互评机制,形成师生互评推动下的联动向好机制,着力改进和提升高校思政教学效果。 展开更多
关键词 数字化赋能 高校思政教学效果 满意度 获得感 认同感 师生互动感知
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天基自然灾害勘测系统效能仿真研究
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作者 刘震磊 李欣宇 +2 位作者 齐纪 李月月 吴浩 《中国电子科学研究院学报》 2024年第1期15-20,共6页
对地遥感卫星系统是应急管理、防灾减灾系统中的重要组成部分,主要用于在灾害发生后快速、精准地提供灾区受灾面积、损伤情况等第一手资料。文中以对地遥感卫星系统灾害勘测场景为研究对象,系统梳理了其卫星星座发展历程,并以当前我国... 对地遥感卫星系统是应急管理、防灾减灾系统中的重要组成部分,主要用于在灾害发生后快速、精准地提供灾区受灾面积、损伤情况等第一手资料。文中以对地遥感卫星系统灾害勘测场景为研究对象,系统梳理了其卫星星座发展历程,并以当前我国对地遥感卫星星座为基础,利用STK软件构建灾后勘测仿真场景,从覆盖百分比、最大覆盖间隙和平均访问时间三个方面分析了该系统对灾区的勘测效能。仿真结果可为我国完善应急卫星星座建设及应急指挥决策提供参考。 展开更多
关键词 自然灾害勘测 遥感卫星 STK仿真 效能仿真
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