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基于AVC理论的小城镇空间环境优化路径研究
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作者 莫洲瑾 孙钰洁 曲劼 《建筑与文化》 2025年第7期82-84,共3页
文章旨在探索基于AVC理论的小城镇空间环境优化路径。首先,通过分析AVC理论内涵,明确其三力协同框架,结合政策分析提取空间环境核心要素。其次,借鉴日本箱根町和中国乌镇等案例,探讨资源解码与品牌重塑、产业融合与社群共生、生态韧性... 文章旨在探索基于AVC理论的小城镇空间环境优化路径。首先,通过分析AVC理论内涵,明确其三力协同框架,结合政策分析提取空间环境核心要素。其次,借鉴日本箱根町和中国乌镇等案例,探讨资源解码与品牌重塑、产业融合与社群共生、生态韧性与智慧治理等实践路径。最后,提出构建动态评估系统、实施精准分类治理、强化社群赋权机制等优化对策,以提升小城镇的可持续发展能力,为小城镇空间环境优化提供了理论支持与实践指导。 展开更多
关键词 avc理论 小城镇 空间环境 要素协同
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海上风电集群AVC子站无功电压灵敏度协同控制策略研究 被引量:3
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作者 徐贤 朱丹丹 +4 位作者 徐晓春 王栋 戴欣 王玉荣 印心童 《电测与仪表》 北大核心 2025年第4期53-64,共12页
当前,我国东部部分沿海地区已形成了规模化的新能源发电集群,海上风电场已从长距离放射形接入电网的形式,逐渐发展为登陆后近距离汇聚再接入主网的接线形式。沿用传统单风电场接入系统的无功电压灵敏度方式响应自动电压控制(automatic v... 当前,我国东部部分沿海地区已形成了规模化的新能源发电集群,海上风电场已从长距离放射形接入电网的形式,逐渐发展为登陆后近距离汇聚再接入主网的接线形式。沿用传统单风电场接入系统的无功电压灵敏度方式响应自动电压控制(automatic voltage control, AVC)主站电压指令的运行过程中,易引发局部电网电压异常波动。为此提出了一种风电集群AVC子站无功电压灵敏度协同控制策略。考虑各风电场的交互关系,推导了多种风电集群并网拓扑形式下AVC子站无功电压灵敏度计算方法,并提出了解耦的AVC子站无功电压灵敏度协同控制策略;进一步,具体分析了不同子站无功源出力分配方式下的场内网损。基于MATLAB/MATPOWER平台搭建了三种典型风电集群汇聚模型并对比验证了算法的有效性。算例结果表明,相比传统无功电压灵敏度算法,所提算法能够调节风电集群无功出力以平稳有效应对AVC主站电压指令,在电压偏差指令变化、拓扑结构变化和风电出力水平不同条件下均能够较好地实现各子站并网点电压偏差控制,维持电网电压稳定运行。 展开更多
关键词 avc系统 海上风电集群 SVG 无功电压控制 无功电压灵敏度
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基于AVC理论的白沙滩水库型水利风景区旅游景观综合评价
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作者 马慧 穆洪洲 +1 位作者 普丽群 王策 《林业调查规划》 2025年第2期172-179,共8页
水利风景区是维护水资源健康、传承水文化、促进人与自然协调发展的关键平台,承载着建设国家生态文明的重要使命。为推动水利风景区高质量发展、实现存量更新,基于AVC理论、层次分析法、德尔菲法,从吸引力、生命力、承载力3个维度选取指... 水利风景区是维护水资源健康、传承水文化、促进人与自然协调发展的关键平台,承载着建设国家生态文明的重要使命。为推动水利风景区高质量发展、实现存量更新,基于AVC理论、层次分析法、德尔菲法,从吸引力、生命力、承载力3个维度选取指标,构建适合水库型水利风景区的旅游景观综合评价体系,对克拉玛依市白沙滩景区旅游景观进行评价。研究认为,水库型水利风景区旅游景观AVC三力相对重要性为承载力>吸引力>生命力。白沙滩景区拥有丰富的地形条件和水资源,以及优越的地理位置,但景区游憩设施丰富度、水面互动性、水利文化挖掘有待加强;景区目前旅游产品开发模式较为单一、景区管理人员不足,在旅游收入方面也有很大提升空间;景区丰富的自然景观资源是其优势所在,但未能对活动空间进行精细化划分,使得游客感知及反馈总体较差;水库周边存在安全隐患。藉此提出相应旅游景观提升建议。 展开更多
关键词 旅游景观 综合评价 avc理论 层次分析法 水库型水利风景区 白沙滩景区
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水电站自动电压控制(AVC)常见故障分析及优化
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作者 沈彬 伏箭文 周江南 《电工技术》 2025年第8期216-219,共4页
水电站自动电压控制(Automatic Voltage Control,AVC)能根据电网调度下发的高压母线电压目标值自动调节发电机组无功功率。对水电站自动电压控制在运行中遇到的问题进行原因分析,包括母线电压调节不能进入死区、母线电压波动大而发电机... 水电站自动电压控制(Automatic Voltage Control,AVC)能根据电网调度下发的高压母线电压目标值自动调节发电机组无功功率。对水电站自动电压控制在运行中遇到的问题进行原因分析,包括母线电压调节不能进入死区、母线电压波动大而发电机组无功调节动作频繁、全厂事故总信号误动以及无功调节超时、拒动导致全厂AVC退出等问题,并提出优化意见。 展开更多
关键词 自动电压控制 avc 故障
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Progressive failure of frozen sodium sulfate saline sandy soil under uniaxial compression 被引量:1
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作者 Dongyong Wang Bo Shao +2 位作者 Jilin Qi Wenyu Cui Liyun Peng 《Journal of Rock Mechanics and Geotechnical Engineering》 2025年第7期4646-4656,共11页
The progressive failure characteristics of geomaterial are a remarkable and challenging topic in geotechnical engineering.To study the effect of salt content and temperature on the progressive failure characteristics ... The progressive failure characteristics of geomaterial are a remarkable and challenging topic in geotechnical engineering.To study the effect of salt content and temperature on the progressive failure characteristics of frozen sodium sulfate saline sandy soil,a series of uniaxial compression tests were performed by integrating digital image correlation(DIC)technology into the testing apparatus.The evolution law of the uniaxial compression strength(UCS),the failure strain,and the formation of the shear band of the frozen sodium sulfate saline sandy soil were analyzed.The test results show that within the scope of this study,with the increase of salt content,both the UCS and the shear band angle initially decrease with increasing salt content before showing an increase.In contrast,the failure strain and the width of the shear band exhibit an initial increase followed by a decrease in the samples.In addition,to investigate the brittle failure characteristics of frozen sodium sulfate saline sandy soil,two classic brittleness evaluation methods were employed to quantitatively assess the brittleness level for the soil samples.The findings suggest that the failure characteristics under all test conditions in this study belong to the transition stage between brittle and ductile,indicating that frozen sodium sulfate saline sandy soil exhibits certain brittle behavior under uniaxial compression conditions,and the brittleness index basically decreases and then increases with the rise in salt content. 展开更多
关键词 Frozen sodium sulfate saline sandy soil Uniaxial compression test Digital image correlation Progressive failure Brittleness index
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奉贤海上风电场AVC系统应用及优化调整
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作者 牛牧遥 《上海节能》 2025年第7期1132-1136,共5页
随着上海地区风电装机容量的持续增长及大规模并网,风电接入引发的电压控制问题日益凸显,对区域电网的安全稳定运行造成挑战。奉贤海上风电场作为上海市首个应用自动电压控制(AVC)系统的海上风电场,其AVC系统的实践具有重要的示范意义... 随着上海地区风电装机容量的持续增长及大规模并网,风电接入引发的电压控制问题日益凸显,对区域电网的安全稳定运行造成挑战。奉贤海上风电场作为上海市首个应用自动电压控制(AVC)系统的海上风电场,其AVC系统的实践具有重要的示范意义。聚焦奉贤海上风电场AVC系统,分析其控制策略并提出控制参数的优化。工程应用验证表明,优化后的AVC系统能够在保障风电场母线电压安全与电能质量的前提下,有效辅助电网调度系统优化无功潮流分配,为上海地区后续大规模新能源场站AVC系统的应用提供了实践参考。 展开更多
关键词 avc 海上风电场 母线电压 无功调节
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Effect of Current Density and Strain Rate on Deformation Resistance During Electrically-Assisted Compression of AlCr_(1.3)TiNi_(2) Eutectic High-Entropy Alloys
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作者 Wang Fanghui Li Hushan +6 位作者 Zhang Hao Ding Ziheng Bao Jianxing Ding Chaogang Shan Debin Guo Bin Xu Jie 《稀有金属材料与工程》 北大核心 2025年第5期1121-1126,共6页
The effect of deformation resistance of AlCr_(1.3)TiNi_(2) eutectic high-entropy alloys under various current densities and strain rates was investigated during electrically-assisted compression.Results show that at c... The effect of deformation resistance of AlCr_(1.3)TiNi_(2) eutectic high-entropy alloys under various current densities and strain rates was investigated during electrically-assisted compression.Results show that at current density of 60 A/mm^(2) and strain rate of 0.1 s^(−1),the ultimate tensile stress shows a significant decrease from approximately 3000 MPa to 1900 MPa with reduction ratio of about 36.7%.However,as current density increases,elongation decreases due to intermediate temperature embrittlement.This is because the current induces Joule effect,which then leads to stress concentration and more defect formation.Moreover,the flow stress is decreased with the increase in strain rate at constant current density. 展开更多
关键词 eutectic high-entropy alloy electrically-assisted compression deformation resistance flow stress
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基于AVC理论的历史文化旅游区夜景照明设计研究——以广州黄埔古港片区为例
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作者 陈敏 张兰 《光源与照明》 2025年第7期20-23,54,共5页
文章以广州黄埔古港片区为研究对象,围绕吸引力-生命力-承载力(attraction-validity-capacity,AVC)理论构建夜景照明评价体系,主要从吸引力、生命力和承载力三个方面深入剖析目前黄埔古港夜景照明存在的一些问题,并提出相应的改进策略... 文章以广州黄埔古港片区为研究对象,围绕吸引力-生命力-承载力(attraction-validity-capacity,AVC)理论构建夜景照明评价体系,主要从吸引力、生命力和承载力三个方面深入剖析目前黄埔古港夜景照明存在的一些问题,并提出相应的改进策略。根据实地考察,结合文献分析和一些类似的案例对比,研究探讨了如何更好地利用灯光突出历史文化特色、刺激夜间经济发展,同时提高环境承载力。经研究发现,夜景照明不仅只是呈现夜景,更能起到推动文化传播、激发夜间经济活力的作用。 展开更多
关键词 avc理论 夜景照明 历史文化旅游区 黄埔古港 照明设计
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Effects of aggregate size distribution and carbon nanotubes on the mechanical properties of cemented gangue backfill samples under true triaxial compression
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作者 Qian Yin Fan Wen +7 位作者 Zhigang Tao Hai Pu Tianci Deng Yaoyao Meng Qingbin Meng Hongwen Jing Bo Meng Jiangyu Wu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS 2025年第2期311-324,共14页
The mechanical behavior of cemented gangue backfill materials(CGBMs)is closely related to particle size distribution(PSD)of aggregates and properties of cementitious materials.Consequently,the true triaxial compressio... The mechanical behavior of cemented gangue backfill materials(CGBMs)is closely related to particle size distribution(PSD)of aggregates and properties of cementitious materials.Consequently,the true triaxial compression tests,CT scanning,SEM,and EDS tests were conducted on cemented gangue backfill samples(CGBSs)with various carbon nanotube concentrations(P_(CNT))that satisfied fractal theory for the PSD of aggregates.The mechanical properties,energy dissipations,and failure mechanisms of the CGBSs under true triaxial compression were systematically analyzed.The results indicate that appropriate carbon nanotubes(CNTs)effectively enhance the mechanical properties and energy dissipations of CGBSs through micropore filling and microcrack bridging,and the optimal effect appears at P_(CNT)of 0.08wt%.Taking PSD fractal dimension(D)of 2.500 as an example,compared to that of CGBS without CNT,the peak strength(σ_(p)),axial peak strain(ε_(1,p)),elastic strain energy(Ue),and dissipated energy(U_(d))increased by 12.76%,29.60%,19.05%,and90.39%,respectively.However,excessive CNTs can reduce the mechanical properties of CGBSs due to CNT agglomeration,manifesting a decrease inρ_(p),ε_(1,p),and the volumetric strain increment(Δε_(v))when P_(CNT)increases from 0.08wt%to 0.12wt%.Moreover,the addition of CNTs improved the integrity of CGBS after macroscopic failure,and crack extension in CGBSs appeared in two modes:detour and pass through the aggregates.Theσ_(p)and U_(d)firstly increase and then decrease with increasing D,and porosity shows the opposite trend.Theε_(1,p)andΔε_(v)are negatively correlated with D,and CGBS with D=2.150 has the maximum deformation parameters(ε_(1,p)=0.05079,Δε_(v)=0.01990)due to the frictional slip effect caused by coarse aggregates.With increasing D,the failure modes of CGBSs are sequentially manifested as oblique shear failure,"Y-shaped"shear failure,and conjugate shear failure. 展开更多
关键词 cemented gangue backfill materials particle size distribution true triaxial compression test carbon nanotubes mechanical properties failure modes
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660MW火电机组AVC控制策略优化
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作者 刘明 甄云飞 +1 位作者 李元磊 郭泊汛 《中国高新科技》 2025年第18期53-54,57,共3页
河北邯峰发电有限责任公司两台660MW亚临界燃煤汽轮发电机组励磁方式为自并励静止可控硅整流励磁。在调度公布的两个细则考核中,经常出现调节不合格点,导致AVC补偿费较低,甚至出现考核。为了解决这些问题,对调节合格率低的原因进行了分... 河北邯峰发电有限责任公司两台660MW亚临界燃煤汽轮发电机组励磁方式为自并励静止可控硅整流励磁。在调度公布的两个细则考核中,经常出现调节不合格点,导致AVC补偿费较低,甚至出现考核。为了解决这些问题,对调节合格率低的原因进行了分析。通过分析可知,导致调节合格率低的原因在于主站和子站电压采样值不一致。针对原因,提出了遥测死区值和变化门槛值调整的方案。通过调整后的控制方案有效提高了AVC调节合格率,大幅提高了两个细则AVC补偿费用,增加了收益。通过研究,可以为发电企业的AVC调节提供有益借鉴,确保发电企业的可持续发展。 展开更多
关键词 avc自动电压控制系统 策略优化 远动终端
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基于AVC的配电网群控型台区功率主动调节方法
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作者 冯兴隆 韩荣杰 +2 位作者 来益博 吕斌 漏亦楠 《太赫兹科学与电子信息学报》 2025年第3期295-301,共7页
无论是配电网路线结构设计还是网点布置中,均存在电能损耗率较大的问题。为降低配电网的电能损耗并持续提升电能质量,提出基于自动电压控制(AVC)技术的配电网群控型台区功率主动调节方法。以配电网线路运行的等效负载为基础,对配电网群... 无论是配电网路线结构设计还是网点布置中,均存在电能损耗率较大的问题。为降低配电网的电能损耗并持续提升电能质量,提出基于自动电压控制(AVC)技术的配电网群控型台区功率主动调节方法。以配电网线路运行的等效负载为基础,对配电网群控型台区不平衡功率分量进行定义;按照负序分量和正序分量进行划分,选择动态指令对应运行模式,在不同的微分增益条件下确定配电网群控型台区功率调节函数;根据调节函数以及不同参数的所属范围,基于AVC技术确定调节模式,对配电网群控型台区不平衡功率进行主动调节。以配电网中的多个公用台区作为测试对象,通过调节各组台区的无功补偿容量,补偿容量最大可达580 kVA。实验结果表明该方法可实现功率容量的主动调节,使其满足配电网线路的运行标准,具有应用价值。 展开更多
关键词 avc技术 配电网群控型台区 台区功率 主动调节
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IDCE:Integrated Data Compression and Encryption for Enhanced Security and Efficiency
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作者 Muhammad Usama Arshad Aziz +2 位作者 Suliman A.Alsuhibany Imtiaz Hassan Farrukh Yuldashev 《Computer Modeling in Engineering & Sciences》 2025年第4期1029-1048,共20页
Data compression plays a vital role in datamanagement and information theory by reducing redundancy.However,it lacks built-in security features such as secret keys or password-based access control,leaving sensitive da... Data compression plays a vital role in datamanagement and information theory by reducing redundancy.However,it lacks built-in security features such as secret keys or password-based access control,leaving sensitive data vulnerable to unauthorized access and misuse.With the exponential growth of digital data,robust security measures are essential.Data encryption,a widely used approach,ensures data confidentiality by making it unreadable and unalterable through secret key control.Despite their individual benefits,both require significant computational resources.Additionally,performing them separately for the same data increases complexity and processing time.Recognizing the need for integrated approaches that balance compression ratios and security levels,this research proposes an integrated data compression and encryption algorithm,named IDCE,for enhanced security and efficiency.Thealgorithmoperates on 128-bit block sizes and a 256-bit secret key length.It combines Huffman coding for compression and a Tent map for encryption.Additionally,an iterative Arnold cat map further enhances cryptographic confusion properties.Experimental analysis validates the effectiveness of the proposed algorithm,showcasing competitive performance in terms of compression ratio,security,and overall efficiency when compared to prior algorithms in the field. 展开更多
关键词 Chaotic maps SECURITY data compression data encryption integrated compression and encryption
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关于优化自动电压控制(AVC)动作策略的探讨
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作者 程虹 代韬 +2 位作者 钱月坤 彭偲达 郭伟 《电力设备管理》 2025年第3期103-105,共3页
本文针对某地区供电局AVC实际运行中由于设备不适应性、电压设定曲线误差、突发情况等造成电压调控困难的问题,从电压曲线、动作时序两个方面提出分层分区调压优化、分时段调压优化和调压限制因素优化的AVC优化动作策略,将调压动作逻辑... 本文针对某地区供电局AVC实际运行中由于设备不适应性、电压设定曲线误差、突发情况等造成电压调控困难的问题,从电压曲线、动作时序两个方面提出分层分区调压优化、分时段调压优化和调压限制因素优化的AVC优化动作策略,将调压动作逻辑从单站调压优化为多因素配合调压动作。最终,通过该策略的实例应用和设备检修及更改工作开展,经实际数据统计证明:AVC动作占比从2021年的39%提升至2022年的67%,占比提升显著,验证了该动作策略具有良好的可行性。 展开更多
关键词 avc 高峰 低谷 分时调压 时差互补
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风电场AVC系统无功分配技术探析
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作者 王恬 《电力设备管理》 2025年第10期150-152,共3页
本文以永信风电并网为例,其在实际运行中会受到诸多因素影响,还需提出具体无功分配细节,以此确保控制效果。从案例所给出数据看,在实际运行过程中还需围绕具体控制流程,针对无功较高等问题落实针对性处理,从而打造出完善风电场AVC系统... 本文以永信风电并网为例,其在实际运行中会受到诸多因素影响,还需提出具体无功分配细节,以此确保控制效果。从案例所给出数据看,在实际运行过程中还需围绕具体控制流程,针对无功较高等问题落实针对性处理,从而打造出完善风电场AVC系统无功分配技术应用模式。本文重点论述相应优化策略,包括调节电压、多目标协调控制、无功裕度法等,以此提高风电场AVC系统运行可靠性。 展开更多
关键词 风电场 avc系统 无功分配 电压控制
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An Improved LZO Compression Algorithm for FPGA Configuration Bitstream Files
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作者 Xiaoling Lai Jian Zhang +3 位作者 Yangming Guo Ting Ju Qi Zhu Guochang Zhou 《Computers, Materials & Continua》 2025年第2期3091-3109,共19页
With the increase in the quantity and scale of Static Random-Access Memory Field Programmable Gate Arrays (SRAM-based FPGAs) for aerospace application, the volume of FPGA configuration bit files that must be stored ha... With the increase in the quantity and scale of Static Random-Access Memory Field Programmable Gate Arrays (SRAM-based FPGAs) for aerospace application, the volume of FPGA configuration bit files that must be stored has increased dramatically. The use of compression techniques for these bitstream files is emerging as a key strategy to alleviate the burden on storage resources. Due to the severe resource constraints of space-based electronics and the unique application environment, the simplicity, efficiency and robustness of the decompression circuitry is also a key design consideration. Through comparative analysis current bitstream file compression technologies, this research suggests that the Lempel Ziv Oberhumer (LZO) compression algorithm is more suitable for satellite applications. This paper also delves into the compression process and format of the LZO compression algorithm, as well as the inherent characteristics of configuration bitstream files. We propose an improved algorithm based on LZO for bitstream file compression, which optimises the compression process by refining the format and reducing the offset. Furthermore, a low-cost, robust decompression hardware architecture is proposed based on this method. Experimental results show that the compression speed of the improved LZO algorithm is increased by 3%, the decompression hardware cost is reduced by approximately 60%, and the compression ratio is slightly reduced by 0.47%. 展开更多
关键词 FPGA configuration bitstream file LZO compression DEcompression
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传统村落景观AVC综合评价分析--以焦作市陈家沟村为例
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作者 徐玉冉 《现代园艺》 2025年第2期37-40,共4页
传统村落是承载地域景观与文化特色的重要场所,具有丰富的景观资源和文化资源,构建景观AVC综合评价体系有利于传统村落保护和开发。为明确陈家沟村的发展优劣,基于AVC理论对陈家沟村进行实地调研,结合AHP构建4层32项指标的景观AVC综合... 传统村落是承载地域景观与文化特色的重要场所,具有丰富的景观资源和文化资源,构建景观AVC综合评价体系有利于传统村落保护和开发。为明确陈家沟村的发展优劣,基于AVC理论对陈家沟村进行实地调研,结合AHP构建4层32项指标的景观AVC综合评价体系,确定各指标权重后,使用等级赋分法计算综合评价结果。结果表明,陈家沟村景观综合评价值为6.777,处于较好层级;V(7.347)>C(7.272)>A(6.312)“,三力”差异明显、发展不均衡,景观吸引力需要着重提升。研究结果旨在为传统村落的景观评价和旅游开发提供借鉴。 展开更多
关键词 avc理论 陈家沟村 景观评价 层次分析法
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Simultaneous enhancement of strength and thermal conductivity of extruded Mg−Mn−Zn alloy via hot compression
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作者 Hai-feng LIU Xu-yue YANG +4 位作者 Yu-xiu ZHANG Hiromi NAGAUMI Ming-chun ZHAO Zhi-yong SHI Andrej ATRENS 《Transactions of Nonferrous Metals Society of China》 2025年第3期819-831,共13页
An additional hot compression process was applied to a dilute Mg−Mn−Zn alloy post-extrusion.The alloy was extruded at 150℃ with an extrusion ratio of 15:1 and subsequently hot-compressed at 180℃ with a true strain o... An additional hot compression process was applied to a dilute Mg−Mn−Zn alloy post-extrusion.The alloy was extruded at 150℃ with an extrusion ratio of 15:1 and subsequently hot-compressed at 180℃ with a true strain of 0.9 along the extrusion direction.The microstructure,mechanical properties and thermal conductivity of as-extruded and as-hot compressed Mg−Mn−Zn alloys were investigated using optical microscopy,scanning electron microscopy,electron backscattering diffraction,and transmission electron microscopy.The aim was to concurrently enhance both strength and thermal conductivity by fostering uniform and refined microstructures while mitigating basal texture intensity.Substantial improvements were observed in yield strength(YS),ultimate tensile strength(UTS),and elongation(EL),with increase of 77%,53% and 10%,respectively.Additionally,thermal conductivity demonstrated a notable enhancement,rising from 111 to 125 W/(m·K).The underlying mechanism driving these improvements through the supplementary hot compression step was thoroughly elucidated.This study presents a promising pathway for the advancement of Mg alloys characterized by superior thermal and mechanical properties. 展开更多
关键词 Mg alloys hot compression STRENGTH thermal conductivity
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Optimized algorithm for image semantic segmentation compression algorithm in video surveillance scenarios
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作者 ZHANG Yangmei ZHANG Xishan +1 位作者 ZHANG Shuo LI Jintao 《High Technology Letters》 2025年第2期194-203,共10页
In recent years,video coding has been widely applied in the field of video image processing to remove redundant information and improve data transmission efficiency.However,during the video coding process,irrelevant o... In recent years,video coding has been widely applied in the field of video image processing to remove redundant information and improve data transmission efficiency.However,during the video coding process,irrelevant objects such as background elements are often encoded due to environmental disturbances,resulting in the wastage of computational resources.Existing research on video coding efficiency optimization primarily focuses on optimizing encoding units during intra-frame or inter frame prediction after the generation of coding units,neglecting the optimization of video images before coding unit generation.To address this challenge,This work proposes an image semantic segmentation compression algorithm based on macroblock encoding,called image semantic segmentation compression algorithm based on macroblock encoding(ISSC-ME),which consists of three modules.(1)The semantic label generation module generates interesting object labels using a grid-based approach to reduce redundant coding of consecutive frames.(2)The image segmentation network module generates a semantic segmentation image using U-Net.(3)The macroblock coding module,is a block segmentation-based video encoding and decoding algorithm used to compress images and improve video transmission efficiency.Experimental results show that the proposed image semantic segmentation optimization algorithm can reduce the computational costs,and improve the overall accuracy by 1.00%and the mean intersection over union(IoU)by 1.20%.In addition,the proposed compression algorithm utilizes macroblock fusion,resulting in the image compression rate achieving 80.64%.It has been proven that the proposed algorithm greatly reduces data storage and transmission,and enables fast image compression processing at the millisecond level. 展开更多
关键词 macroblock encoding semantic segmentation segmentation compression
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基于实际运行数据的风电场AGC/AVC系统性能测试与分析
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作者 谢克 马文彪 +4 位作者 崔玉斌 崔鸣伦 何天一 吴阳 周圣迪 《电力设备管理》 2025年第6期149-151,共3页
本文对AGC系统的响应速度、调节精度、运行模式切换能力进行了评估,同时对AVC系统的电压稳定性、无功补偿效果、智能优化调节策略及与AGC系统的协调性进行研究。测试结果显示,AGC/AVC系统在提升风电场运行效率、保障电网安全稳定方面发... 本文对AGC系统的响应速度、调节精度、运行模式切换能力进行了评估,同时对AVC系统的电压稳定性、无功补偿效果、智能优化调节策略及与AGC系统的协调性进行研究。测试结果显示,AGC/AVC系统在提升风电场运行效率、保障电网安全稳定方面发挥了重要作用,但也存在响应速度不够快、调节精度有待提高等问题,根据测试结果对系统进行了优化改进。 展开更多
关键词 风电场 AGC/avc系统 性能测试
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Modeling compression behaviors of freeze-thaw-impacted soils extending the disturbed state concept
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作者 Pan Zhang Sai K.Vanapalli Zhong Han 《Journal of Rock Mechanics and Geotechnical Engineering》 2025年第10期6606-6620,共15页
This study investigates the volumetric behaviors of various soils during freeze-thaw(FT)cycles and subsequent one-dimensional(1D)compression from experimental and theoretical studies.Experimental studies were performe... This study investigates the volumetric behaviors of various soils during freeze-thaw(FT)cycles and subsequent one-dimensional(1D)compression from experimental and theoretical studies.Experimental studies were performed on saturated expansive soil specimens with varying compaction conditions and soil structures under different stress states.Experimental results demonstrate that the specimens expand during freezing and contract during thawing.All specimens converge to the same residual void ratio after seven FT cycles,irrespective of their different initial void ratio,stress state,and soil structure.The compression index of the expansive soil specimens increases with the initial void ratio,whereas their swelling index remains nearly constant.A model extending the disturbed state concept(DSC)is proposed to predict the 1D compression behaviors of FT-impacted soils.The model incorporates a parameter,b,to account for the impacts of FT cycles.Empirical equations have been developed to link the key model parameters(i.e.the normalized yield stress and parameter b)to the soil state parameter(i.e.the normalized void ratio)in order to simplify the prediction approach.The proposed model well predicts the results of the tested expansive soil.In addition,the model’s feasibility for other types of soils,including low-and high-plastic clays,and high-plastic organic soils,has been validated using published data from the literature.The proposed model is simple yet reliable for predicting the compression behaviors of soils subjected to FT cycles. 展开更多
关键词 Initial state Freeze-thaw(FT)cycle test One-dimensional(1D)compression test Disturbed state concept(DSC) compression model
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