期刊文献+
共找到32,369篇文章
< 1 2 250 >
每页显示 20 50 100
基于多尺度卷积MSRCR的蒙古族家具纹样增强研究
1
作者 廖瑞姬 刘强 +2 位作者 袁云梅 董霙达 多化琼 《林产工业》 北大核心 2024年第4期55-58,共4页
针对蒙古族家具纹样采集过程中,受到环境、设备、人为干扰以及纹样自身风化等因素影响,产生对比度低、亮度异常、纹样模糊、色彩失真退化等情况,本文提出一种基于多尺度卷积MSRCR增强的算法。通过二次导向滤波、多通道多尺度卷积、线性... 针对蒙古族家具纹样采集过程中,受到环境、设备、人为干扰以及纹样自身风化等因素影响,产生对比度低、亮度异常、纹样模糊、色彩失真退化等情况,本文提出一种基于多尺度卷积MSRCR增强的算法。通过二次导向滤波、多通道多尺度卷积、线性加权融合、白平衡等步骤,对MSRCR算法进行改进。结果表明:该方法能有效提升纹样图像质量,改善纹样图像的对比度、亮度,在相关评价指标中也更优。 展开更多
关键词 蒙古族家具纹样 纹样增强 导向滤波 多尺度卷积 msrcr算法
下载PDF
基于高斯引导滤波MSRCR的奶牛夜间低质量图像增强方法
2
作者 岳帅 秦立峰 《黑龙江畜牧兽医》 CAS 北大核心 2024年第8期37-45,共9页
为了解决奶牛夜间图像存在颜色失真、边缘细节丢失与噪声干扰等低质量问题,试验提出了一种基于高斯引导滤波的彩色恢复多尺度Retinex(multi-scale Retinex with color restoration, MSRCR)图像增强算法,即先利用多尺度高斯滤波函数处理... 为了解决奶牛夜间图像存在颜色失真、边缘细节丢失与噪声干扰等低质量问题,试验提出了一种基于高斯引导滤波的彩色恢复多尺度Retinex(multi-scale Retinex with color restoration, MSRCR)图像增强算法,即先利用多尺度高斯滤波函数处理原始夜间图像得到粗糙照度分量,再利用引导滤波(guided filtering, GF)函数处理获得精确照度分量,然后结合四方向Sobel边缘检测器进行反射分量自适应权值优化,最后通过对数加法将照度分量和反射分量合成增强图像。试验以3组(1组为均匀光照灰度图像、2组为均匀光照彩色图像、3组为非均匀光照彩色图像)夜间不同成像条件下的180幅图像为研究对象,以平均梯度(mean gradient, MG)、标准差(standard deviation, S)、信息熵(information entropy, IE)、边缘保持指数(edge preserving index, EPI)、结构相似性指数(structural similarity index, SSIM)、峰值信噪比(peak signal to noise ratio, PSNR)和运行时间为评价指标,比较分析本算法和直方图均衡(histogram equalization, HE)算法、基于GF的多尺度Retinex算法(即GF+MSR算法)、MSRCR算法和光照自适应Retinex (illuminated adaptation Retinex, IAR)算法的图像增强效果。结果表明:与原图像比,本算法增强后图像的MG值较HE、GF+MSR、MSRCR和IAR算法增强后图像分别提高了72.22%、150.00%、41.67%和31.67%,IE值分别提高了30.42%、56.90%、43.28%、8.65%;S值较GF+MSR、MSRCR和IAR算法增强后图像分别提高了68.61%、74.28%、54.62%,较HE算法增强后图像降低了55.54%。本算法增强后图像的EPI值较HE、GF+MSR、MSRCR和IAR算法分别提高了34.70%、23.72%、51.41%、12.11%,SSIM分别提高了14.47%、9.33%、5.09%、18.19%;PSNR值较经HE、GF+MSR、MSRCR算法增强后图像分别提高了30.12%、11.52%、20.05%,较IAR算法增强后图像降低了0.67%;同时本算法运行时间分别较HE、GF+MSR、IAR算法减少了67.55%、32.81%、10.14%,而较MSRCR算法增加了139.47%。说明本算法能够有效增强夜间图像的边缘信息并抑制噪声干扰,提高了夜间奶牛图像的质量。 展开更多
关键词 夜间图像增强 彩色恢复多尺度Retinex(msrcr) 高斯滤波 引导滤波 四方向Sobel边缘检测器
下载PDF
Ecological problems and ecological restoration zoning of the Aral Sea 被引量:1
3
作者 BAO Anming YU Tao +7 位作者 XU Wenqiang LEI Jiaqiang JIAPAER Guli CHEN Xi Tojibaev KOMILJON Shomurodov KHABIBULLO Xabibullaev B SAGIDULLAEVICH Idirisov KAMALATDIN 《Journal of Arid Land》 SCIE CSCD 2024年第3期315-330,共16页
The Aral Sea was the fourth largest lake in the world but it has shrunk dramatically as a result of irrational human activities, triggering the "Aral Sea ecological crisis". The ecological problems of the Ar... The Aral Sea was the fourth largest lake in the world but it has shrunk dramatically as a result of irrational human activities, triggering the "Aral Sea ecological crisis". The ecological problems of the Aral Sea have attracted widespread attention, and the alleviation of the Aral Sea ecological crisis has reached a consensus among the five Central Asian countries(Kazakhstan, Uzbekistan, Tajikistan, Kyrgyzstan, and Turkmenistan). In the past decades, many ecological management measures have been implemented for the ecological restoration of the Aral Sea. However, due to the lack of regional planning and zoning, the results are not ideal. In this study, we mapped the ecological zoning of the Aral Sea from the perspective of ecological restoration based on soil type, soil salinity, surface water, groundwater table, Normalized Difference Vegetation Index(NDVI), land cover, and aerosol optical depth(AOD) data. Soil salinization and salt dust are the most prominent ecological problems in the Aral Sea. We divided the Aral Sea into 7 first-level ecological restoration subregions(North Aral Sea catchment area in the downstream of the Syr Darya River(Subregion Ⅰ);artificial flood overflow area in the downstream of the Aral Sea(Subregion Ⅱ);physical/chemical remediation area of the salt dust source area in the eastern part of the South Aral Sea(Subregion Ⅲ);physical/chemical remediation area of severe salinization in the central part of the South Aral Sea(Subregion Ⅳ);existing water surface and potential restoration area of the South Aral Sea(Subregion Ⅴ);Aral Sea vegetation natural recovery area(Subregion Ⅵ);and vegetation planting area with slight salinization in the South Aral Sea(Subregion Ⅶ)) and 14 second-level ecological restoration subregions according to the ecological zoning principles. Implementable measures are proposed for each ecological restoration subregion. For Subregion Ⅰ and Subregion Ⅱ with lower elevations, artificial flooding should be carried out to restore the surface of the Aral Sea. Subregion Ⅲ and Subregion Ⅳ have severe salinization, making it difficult for vegetation to grow. In these subregions, it is recommended to cover and pave the areas with green biomatrix coverings and environmentally sustainable bonding materials. In Subregion Ⅴ located in the central and western parts of the South Aral Sea, surface water recharge should be increased to ensure that this subregion can maintain normal water levels. In Subregion Ⅵ and Subregion Ⅶ where natural conditions are suitable for vegetation growth, measures such as afforestation and buffer zones should be implemented to protect vegetation. This study could provide a reference basis for future comprehensive ecological management and restoration of the Aral Sea. 展开更多
关键词 ecological restoration zoning salt and dust storms soil salinization ecological crisis Aral Sea Central Asia
下载PDF
改进MSRCR的透明物体逆光图像增强算法
4
作者 郭成 胡小平 +2 位作者 彭向前 黄泓 彭锷 《传感技术学报》 CAS CSCD 北大核心 2024年第4期645-651,共7页
针对透明物体逆光图像对比度低、可视质量差、部分区域过度曝光、边缘信息模糊等问题,提出了一种改进MSRCR(Multi-Scale Retinex with Color Restoration)的透明物体逆光图像增强算法。首先,在MSRCR算法的基础上添加最小可觉差的倒数作... 针对透明物体逆光图像对比度低、可视质量差、部分区域过度曝光、边缘信息模糊等问题,提出了一种改进MSRCR(Multi-Scale Retinex with Color Restoration)的透明物体逆光图像增强算法。首先,在MSRCR算法的基础上添加最小可觉差的倒数作为光照分量的调节因子,解决图像的色偏问题,得到准确清晰的透明物体边缘信息;然后,利用自适应对比度增强算法对原图像进行处理,得到亮度适中,对比度高的图像;最后,将两幅图像按亮度均值比例进行拉普拉斯金字塔融合,并进行线性拉伸。将该算法应用于安瓿瓶视觉尺寸测量,结果表明:改进MSRCR的透明物体逆光图像增强算法,能有效解决MSRCR算法的色偏问题,突显透明物体边缘细节信息,并保留亮度增强效果,将安瓿瓶的尺寸误差由0.35 mm降低到0.1mm,提高了透明物体尺寸测量精度。 展开更多
关键词 图像增强 msrcr算法 最小可觉差 图像融合 透明物体 逆光图像
下载PDF
基于G-MSRCR算法的水下图像增强研究
5
作者 刘飞跃 沈靖夫 +1 位作者 柳淳 张元良 《舰船科学技术》 北大核心 2024年第17期162-167,共6页
针对水下采集的图像存在色偏严重、对比度偏低的现象,本文提出一种基于自适应直方图拉伸和改进MSRCR的水下图像增强方法。该方法主要分为以下几个步骤:首先采用白平衡调整图像的颜色温度尽可能地消除色偏,其次通过设计的自适应HE分段函... 针对水下采集的图像存在色偏严重、对比度偏低的现象,本文提出一种基于自适应直方图拉伸和改进MSRCR的水下图像增强方法。该方法主要分为以下几个步骤:首先采用白平衡调整图像的颜色温度尽可能地消除色偏,其次通过设计的自适应HE分段函数对图像进行进一步的色彩平衡处理从而增强图像的视觉效果,然后使用增加了对比度增强的MSRCR对图像进行色彩恢复和对比度增强,最后通过新的AGCWD对图像进行对比度调整从而使最终获得的图像色彩平衡,明暗分明。为了证明本文方法的有效性选取了水下真实图像进行增强处理,并且选取最近几年的算法进行参考对比,实验结果证明本文算法对于水下色偏严重、对比度不高的图像具有很好的增强效果,增强后的图像质量增加、色偏减少、清晰度更高。 展开更多
关键词 水下图像增强 msrcr 白平衡 AGCWD 颜色校正
下载PDF
Stepwise Ecological Restoration:A framework for improving restoration outcomes
6
作者 Junguo Liu Yuehan Dou He Chen 《Geography and Sustainability》 CSCD 2024年第2期160-166,共7页
Ecosystem degradation is one of the critical constraints for the sustainable development of our planet.However,recovering an ecosystem to a pre-impairment condition is often not practical.The International Restoration... Ecosystem degradation is one of the critical constraints for the sustainable development of our planet.However,recovering an ecosystem to a pre-impairment condition is often not practical.The International Restoration Standards provide the first framework for practical guidance on what constitutes the process of ecological repair and how this repair process can be influenced to improve net ecological benefits.In these Standards,Restorative Continuum is highlighted and it recognises that many do not,yet there is still value in aspiring to improvements to the highest extent possible,with some sites potentially being able to be improved in a stepwise manner.Here we elaborate on these Standards by providing a cross-ecosystem theoretical framework of Stepwise Ecological Restoration(STERE)for promoting higher environmental benefits.STERE allows the selection of suitable restorative modes by considering the degree of degradation while encouraging a transition to a higher state.These models include environmental remediation for completely modified and degraded ecosystems,ecological rehabilitation for highly modified and degraded ecosystems,and ecological restoration for degraded native ecosystems.STERE requires selecting tailored restorative modes,setting clear restorative targets and reference ecosystems,applying a systematic-thinking approach,and implementing a continuous monitoring program at all process stages to achieve a resilient trajectory.STERE allows adaptive management in the context of climate change,and when the evidence is available,to“adapt to the future”to ensure climate resilience.The STERE framework could assist in initiating and implementing restoration projects worldwide,especially in developing countries. 展开更多
关键词 Ecological restoration Reference ecosystem Restorative modes Sustainable development
下载PDF
Lactate is a potentially harmful substitute for brain glucose fuel:consequences for metabolic restoration of neurotransmission
7
作者 Oliver Kann Lennart Soder Babak Khodaie 《Neural Regeneration Research》 SCIE CAS 2025年第5期1403-1404,共2页
The metabolite lactate (L-lactate) can be generated and released by diverse brain cells,including neurons,astrocytes,and oligodendrocytes (Kann,2023;Rae et al.,2024).Lactate production usually requires the degradation... The metabolite lactate (L-lactate) can be generated and released by diverse brain cells,including neurons,astrocytes,and oligodendrocytes (Kann,2023;Rae et al.,2024).Lactate production usually requires the degradation of glucose (D-glucose)-and glycogen in astrocytes-to pyruvate by glycolysis and subsequent conversion of pyruvate to lactate by the enzyme lactate dehydrogenase(Figure 1A;Dienel,2019;Rae et al.,2024). 展开更多
关键词 consequences FIGURE restoration
下载PDF
Restoration or Rehabilitation of the Faleme River Affected by Mining Activities: What Methods?
8
作者 Mor Diop Ibrahima Mall +3 位作者 Elhadji Mamadou Sonko Tidiane Diop Birane Niane Cheikh Mbow 《Journal of Water Resource and Protection》 CAS 2024年第4期233-263,共31页
The Faleme River, a West Africa long transboundary stream (625 km) and abundant flow (>1100 million m<sup>3</sup>) is affected by severe erosion because of mining activities that takes place throughout ... The Faleme River, a West Africa long transboundary stream (625 km) and abundant flow (>1100 million m<sup>3</sup>) is affected by severe erosion because of mining activities that takes place throughout the riverbed. To preserve this important watercourse and ensure the sustainability of its services, selecting and implementing appropriates restorations techniques is vital. In this context, the purpose of this paper was to present an overview of the actions and techniques that can be implemented for the restoration/rehabilitation of the Faleme. The methodological approach includes field investigation, water sampling, literature review with cases studies and SWOT analysis of the four methods presented: river dredging, constructed wetlands, floating treatment wetlands and chemical precipitation (coagulation and flocculation). The study confirmed the pollution of the river by suspended solids (TSS > 1100 mg/L) and heavy metals such as iron, zinc, aluminium, and arsenic. For the restoration methods, it was illustrated through description of their mode of operation and through some case studies presented, that all the four methods have proven their effectiveness in treating rivers but have differences in their costs, their sustainability (detrimental to living organisms or causing a second pollution) and social acceptance. They also have weaknesses and issues that must be addressed to ensure success of rehabilitation. For the case of the Faleme river, after analysis, floating treatment wetlands are highly recommended for their low cost, good removal efficiency if the vulnerability of the raft and buoyancy to strong waves and flow is under control. 展开更多
关键词 Faleme River River restoration Constructed Wetlands DREDGING Floating Treatment Wetlands COAGULATION-FLOCCULATION
下载PDF
Phytoremediation Strategies for Heavy Metal Contamination: A Review on Sustainable Approach for Environmental Restoration
9
作者 Mariam Salifu Matthew Abu John +3 位作者 Murtala Abubakar Ibukunoluwa Abimbola Bankole Nneka Damola Ajayi Olawumi Amusan 《Journal of Environmental Protection》 2024年第4期450-474,共25页
Current globalization trends and important breakthroughs globally need a complete study of heavy metal contamination, its causes, its impacts on human and environmental health, and different remediation strategies. He... Current globalization trends and important breakthroughs globally need a complete study of heavy metal contamination, its causes, its impacts on human and environmental health, and different remediation strategies. Heavy metal pollution is mostly produced by urbanization and industry, which threatens ecosystems and human health. Herein, we discuss a sustainable environmental restoration strategy employing phytoremediation for heavy metal pollution, the carcinogenic, mutagenic, and cytotoxic effects of heavy metals such as cadmium, copper, mercury, selenium, zinc, arsenic, chromium, lead, nickel, and silver, which may be fatal. Phytoremediation, which was prioritized, uses plants to remove, accumulate, and depollute pollutants. This eco-friendly method may safely collect, accumulate, and detoxify toxins using plants, making it popular. This study covers phytostabilization, phytodegradation, rhizodegradation, phytoextraction, phytovolatilization, and rhizofiltration. A phytoremediation process’s efficiency in varied environmental circumstances depends on these components’ complex interplay. This paper also introduces developing phytoremediation approaches including microbe-assisted, chemical-assisted, and organic or bio-char use. These advancements attempt to overcome conventional phytoremediation’s limitations, such as limited suitable plant species, location problems, and sluggish remediation. Current research includes machine learning techniques and computer modeling, biostimulation, genetic engineering, bioaugmentation, and hybrid remediation. These front-line solutions show that phytoremediation research is developing towards transdisciplinary efficiency enhancement. We acknowledge phytoremediation’s promise but also its drawbacks, such as site-specific variables, biomass buildup, and sluggish remediation, as well as ongoing research to address them. In conclusion, heavy metal pollution threatens the ecology and public health and must be reduced. Phytoremediation treats heavy metal pollution in different ways. Over time, phytoremediation systems have developed unique ways that improve efficiency. Despite difficulties like site-specificity, sluggish remediation, and biomass buildup potential, phytoremediation is still a vital tool for environmental sustainability. 展开更多
关键词 PHYTOREMEDIATION HEAVY-METAL CONTAMINATION SUSTAINABILITY restoration
下载PDF
Restoration of the JPEG Maximum Lossy Compressed Face Images with Hourglass Block-GAN
10
作者 Jongwook Si Sungyoung Kim 《Computers, Materials & Continua》 SCIE EI 2024年第3期2893-2908,共16页
In the context of high compression rates applied to Joint Photographic Experts Group(JPEG)images through lossy compression techniques,image-blocking artifacts may manifest.This necessitates the restoration of the imag... In the context of high compression rates applied to Joint Photographic Experts Group(JPEG)images through lossy compression techniques,image-blocking artifacts may manifest.This necessitates the restoration of the image to its original quality.The challenge lies in regenerating significantly compressed images into a state in which these become identifiable.Therefore,this study focuses on the restoration of JPEG images subjected to substantial degradation caused by maximum lossy compression using Generative Adversarial Networks(GAN).The generator in this network is based on theU-Net architecture.It features a newhourglass structure that preserves the characteristics of the deep layers.In addition,the network incorporates two loss functions to generate natural and high-quality images:Low Frequency(LF)loss and High Frequency(HF)loss.HF loss uses a pretrained VGG-16 network and is configured using a specific layer that best represents features.This can enhance the performance in the high-frequency region.In contrast,LF loss is used to handle the low-frequency region.The two loss functions facilitate the generation of images by the generator,which can mislead the discriminator while accurately generating high-and low-frequency regions.Consequently,by removing the blocking effects frommaximum lossy compressed images,images inwhich identities could be recognized are generated.This study represents a significant improvement over previous research in terms of the image resolution performance. 展开更多
关键词 JPEG lossy compression restoration image generation GAN
下载PDF
Research on Restoration of Murals Based on Diffusion Model and Transformer
11
作者 Yaoyao Wang Mansheng Xiao +2 位作者 Yuqing Hu Jin Yan Zeyu Zhu 《Computers, Materials & Continua》 SCIE EI 2024年第9期4433-4449,共17页
Due to the limitations of a priori knowledge and convolution operation,the existing image restoration techniques cannot be directly applied to the cultural relics mural restoration,in order to more accurately restore ... Due to the limitations of a priori knowledge and convolution operation,the existing image restoration techniques cannot be directly applied to the cultural relics mural restoration,in order to more accurately restore the original appearance of the cultural relics mural images,an image restoration based on the denoising diffusion probability model(Denoising Diffusion Probability Model(DDPM))and the Transformer method.The process involves two steps:in the first step,the damaged mural image is firstly utilized as the condition to generate the noise image,using the time,condition and noise image patch as the inputs to the noise prediction network,capturing the global dependencies in the input sequence through the multi-attentionmechanismof the input sequence and feedforward neural network processing,and designing a long skip connection between the shallow and deep layers in the Transformer blocks between the shallow and deep layers using long skip connections to fuse the feature information of global and local outputs to maintain the overall consistency of the restoration results;In the second step,taking the noisy image as a condition to direct the diffusion model to back sample to generate the restored image.Experiment results show that the PSNR and SSIM of the proposedmethod are improved by 2%to 9%and 1%to 3.3%,respectively,which are compared to the comparison methods.This study proposed synthesizes the advantages of the diffusionmodel and deep learningmodel to make themural restoration results more accurate. 展开更多
关键词 TRANSFORMER deep learning noise estimation network diffusion model mural restoration
下载PDF
Characterisation of the Bacteria and Archaea Community Associated with Wild Oysters, At Three Possible Restoration Sites in the North Sea
12
作者 Natacha M. S. Juste-Poinapen Yang Lu +2 位作者 Blanca Bolaños De Hoyos George C. Birch Camille Saurel 《Open Journal of Marine Science》 2024年第2期19-40,共22页
With 85% of the global oyster reefs destroyed, there is an urgent need for large scale restoration to benefit from the ecosystem services provided by biogenic oyster reefs and their associated biodiversity, including ... With 85% of the global oyster reefs destroyed, there is an urgent need for large scale restoration to benefit from the ecosystem services provided by biogenic oyster reefs and their associated biodiversity, including microorganisms that drive marine biogeochemical cycles. This experiment established a baseline for the monitoring of the bacterial and archaeal community associated with wild oysters, using samples from their immediate environment of the Voordelta, with cohabiting Crassostrea gigas and Ostrea edulis, Duikplaats with only C. gigas attached to rocks, and the Dansk Skaldyrcentre, with no onsite oysters. The microbial profiling was carried out through DNA analysis of samples collected from the surfaces of oyster shells and their substrate, the sediment and seawater. Following 16S rRNA amplicon sequencing and bioinformatics, alpha indices implied high species abundance and diversity in sediment but low abundance in seawater. As expected, Proteobacteria, Bacteroidetes, Firmicutes and Thaumarchaeota dominated the top 20 OTUs. In the Voordelta, OTUs related to Colwellia, Shewanella and Psychrobium differentiated the oysters collected from a reef with those attached to rocks. Duikplaats were distinct for sulfur-oxidizers Sulfurimonas and sulfate-reducers from the Sva 0081 sediment group. Archaea were found mainly in sediments and the oyster associated microbiome, with greater abundance at the reef site, consisting mostly of Thaumarchaeota from the family Nitrosopumilaceae. The oyster free site displayed archaea in sediments only, and algal bloom indicator microorganisms from the Rhodobacteraceae, Flavobacteriaceae family and genus [Polaribacter] huanghezhanensis, in addition to the ascidian symbiotic partner, Synechococcus. This study suggests site specific microbiome shifts, influenced by the presence of oysters and the type of substrate. 展开更多
关键词 Oyster Reefs MICROBIOME Marine Bacteria Marine Archaea restoration
下载PDF
Feature extraction and analysis of reclaimed vegetation in ecological restoration area of abandoned mines based on hyperspectral remote sensing images
13
作者 MAO Zhengjun WANG Munan +3 位作者 CHU Jiwei SUN Jiewen LIANG Wei YU Haiyong 《Journal of Arid Land》 SCIE CSCD 2024年第10期1409-1425,共17页
The vegetation growth status largely represents the ecosystem function and environmental quality.Hyperspectral remote sensing data can effectively eliminate the effects of surface spectral reflectance and atmospheric ... The vegetation growth status largely represents the ecosystem function and environmental quality.Hyperspectral remote sensing data can effectively eliminate the effects of surface spectral reflectance and atmospheric scattering and directly reflect the vegetation parameter information.In this study,the abandoned mining area in the Helan Mountains,China was taken as the study area.Based on hyperspectral remote sensing images of Zhuhai No.1 hyperspectral satellite,we used the pixel dichotomy model,which was constructed using the normalized difference vegetation index(NDVI),to estimate the vegetation coverage of the study area,and evaluated the vegetation growth status by five vegetation indices(NDVI,ratio vegetation index(RVI),photochemical vegetation index(PVI),red-green ratio index(RGI),and anthocyanin reflectance index 1(ARI1)).According to the results,the reclaimed vegetation growth status in the study area can be divided into four levels(unhealthy,low healthy,healthy,and very healthy).The overall vegetation growth status in the study area was generally at low healthy level,indicating that the vegetation growth status in the study area was not good due to short-time period restoration and harsh damaged environment such as high and steep rock slopes.Furthermore,the unhealthy areas were mainly located in Dawukougou where abandoned mines were concentrated,indicating that the original mining activities have had a large effect on vegetation ecology.After ecological restoration of abandoned mines,the vegetation coverage in the study area has increased to a certain extent,but the amplitude was not large.The situation of vegetation coverage in the northern part of the study area was worse than that in the southern part,due to abandoned mines mainly concentrating in the northern part of the Helan Mountains.The combination of hyperspectral remote sensing data and vegetation indices can comprehensively extract the characteristics of vegetation,accurately analyze the plant growth status,and provide technical support for vegetation health evaluation. 展开更多
关键词 hyperspectral remote sensing abandoned mine ecological restoration vegetation growth status vegetation index vegetation coverage
下载PDF
Offset restoration in total hip arthroplasty:Important:A current review
14
作者 Anil Thomas Oommen 《World Journal of Orthopedics》 2024年第8期696-703,共8页
Normal vertical and horizontal offset is essential for hip biomechanics,muscle functioning and gait pattern.Total hip arthroplasty(THA)should aim to restore normal offset with implantation of femoral and acetabular co... Normal vertical and horizontal offset is essential for hip biomechanics,muscle functioning and gait pattern.Total hip arthroplasty(THA)should aim to restore normal offset with implantation of femoral and acetabular components.This would be possible with proper preoperative planning,templating and ensuring implant options are available for offset restoration.Templating is essential for understanding the vertical and horizontal offset change,especially in hip arthritis presenting late with significant limb length discrepancy at THA.Planning should include appropriate soft tissue releases and the use of ideal implants to achieve restoration of horizontal and vertical offset.Under correction of horizontal offset at THA for fracture neck of femur could result in abductor fatigue,limp and increased wear.Restoration of horizontal offset is imperative at THA for a fractured neck of the femur to achieve optimal abductor function.Horizontal offset is necessary for optimal abductor muscle tension and function.Revision THA for acetabular bone loss would require hip center restoration with the acetabular and femoral offset correction to achieve limb length correction and abductor length.The inability to achieve vertical and horizontal offset correction could lead to dislocation or signs of abductor fatigue.Careful vertical and horizontal femur offset restoration is required for normal hip biomechanics,decreased wear and increased longevity. 展开更多
关键词 OFFSET VERTICAL HORIZONTAL Total hip arthroplasty TEMPLATING restoration
下载PDF
Resilience-Oriented Load Restoration Method and Repair Strategies for Regional Integrated Electricity-Natural Gas System
15
作者 Keqiang Wang Pengyang Zhao +4 位作者 Changjian Wang Zimeng Zhang Yu Zhang Jia Lu Zedong Yang 《Energy Engineering》 EI 2024年第4期1091-1108,共18页
The rising frequency of extreme disaster events seriously threatens the safe and secure operation of the regional integrated electricity-natural gas system(RIENGS).With the growing level of coupling between electric a... The rising frequency of extreme disaster events seriously threatens the safe and secure operation of the regional integrated electricity-natural gas system(RIENGS).With the growing level of coupling between electric and natural gas systems,it is critical to enhance the load restoration capability of both systems.This paper proposes a coordinated optimization strategy for resilience-enhanced RIENGS load restoration and repair scheduling and transforms it into a mixed integer second-order cone programming(MISOCP)model.The proposed model considers the distribution network reconfiguration and the coordinated repair strategy between the two systems,minimizing the total system load loss cost and repair time.In addition,a bi-directional gas flow model is used to describe the natural gas system,which can provide the RIENGS with more flexibility for load restoration during natural gas system failure.Finally,the effectiveness of the proposed approach is verified by conducting case studies on the test systems RIENGS E13-G7 and RIENGS E123-G20. 展开更多
关键词 RESILIENCE regional integrated electricity-natural gas system load restoration repair strategy
下载PDF
基于改进MSRCR的光伏板图像去雾方法研究
16
作者 高航 白晨博 贾强 《长江信息通信》 2024年第4期138-141,共4页
针对光伏厂区遇到大雾天气,监控系统不能清晰观测到光伏板现场状况等问题,文章进行了图像去雾的算法研究,提出了一种改进的MSRCR算法,可以提高图像对比度和颜色饱和度,达到光伏板图像去雾的目的。以陕西某地为例,与两种传统算法进行比较... 针对光伏厂区遇到大雾天气,监控系统不能清晰观测到光伏板现场状况等问题,文章进行了图像去雾的算法研究,提出了一种改进的MSRCR算法,可以提高图像对比度和颜色饱和度,达到光伏板图像去雾的目的。以陕西某地为例,与两种传统算法进行比较,结果表明,该文算法可以对光伏板带雾图像进行有效处理,获得更真实准确的细节和真实的光感色彩。 展开更多
关键词 图像 光伏板 去雾 msrcr
下载PDF
From single to combinatorial therapies in spinal cord injuries for structural and functional restoration
17
作者 Ernesto Doncel-Pérez Gabriel Guízar-Sahagún Israel Grijalva-Otero 《Neural Regeneration Research》 SCIE CAS 2025年第3期660-670,共11页
Spinal cord injury results in paralysis, sensory disturbances, sphincter dysfunction, and multiple systemic secondary conditions, most arising from autonomic dysregulation. All this produces profound negative psychoso... Spinal cord injury results in paralysis, sensory disturbances, sphincter dysfunction, and multiple systemic secondary conditions, most arising from autonomic dysregulation. All this produces profound negative psychosocial implications for affected people, their families, and their communities;the financial costs can be challenging for their families and health institutions. Treatments aimed at restoring the spinal cord after spinal cord injury, which have been tested in animal models or clinical trials, generally seek to counteract one or more of the secondary mechanisms of injury to limit the extent of the initial damage. Most published works on structural/functional restoration in acute and chronic spinal cord injury stages use a single type of treatment: a drug or trophic factor, transplant of a cell type, and implantation of a biomaterial. Despite the significant benefits reported in animal models, when translating these successful therapeutic strategies to humans, the result in clinical trials has been considered of little relevance because the improvement, when present, is usually insufficient. Until now, most studies designed to promote neuroprotection or regeneration at different stages after spinal cord injury have used single treatments. Considering the occurrence of various secondary mechanisms of injury in the acute and sub-acute phases of spinal cord injury, it is reasonable to speculate that more than one therapeutic agent could be required to promote structural and functional restoration of the damaged spinal cord. Treatments that combine several therapeutic agents, targeting different mechanisms of injury, which, when used as a single therapy, have shown some benefits, allow us to assume that they will have synergistic beneficial effects. Thus, this narrative review article aims to summarize current trends in the use of strategies that combine therapeutic agents administered simultaneously or sequentially, seeking structural and functional restoration of the injured spinal cord. 展开更多
关键词 neural regeneration NEUROPROTECTION spinal cord injury repair spinal cord injury treatments structural restoration of spinal cord injury
下载PDF
Total hip arthroplasty for sequelae of childhood hip disorders:Current review of management to achieve hip centre restoration
18
作者 Anil Thomas Oommen 《World Journal of Orthopedics》 2024年第8期683-695,共13页
Adults requiring total hip arthroplasty(THA)for childhood disorder sequelae present with shortening,limp,pain,and altered gait.THA,which can be particularly challenging due to altered anatomy,requires careful planning... Adults requiring total hip arthroplasty(THA)for childhood disorder sequelae present with shortening,limp,pain,and altered gait.THA,which can be particularly challenging due to altered anatomy,requires careful planning,assessment,and computed tomography evaluation.Preoperative templating is essential to establish the appropriate acetabular and femoral size.Information regarding neck length and offset is needed to ensure the proper options are available at THA.Hip centre restoration must be planned preoperatively and achieved intraoperatively with appropriate exposure,identification,and stable fixation with optimum-size components.Identifying the actual acetabular floor is essential as changes include altered anatomy,distortion of the margins and version changes.Proximal femur changes include anatomical variation,decreased canal diameter,cortical thickness,changes in anteversion,and metaphyseal and diaphyseal mismatch.Preoperative assessment should consist of limb assessment for variations due to prior surgical procedures.Evaluation of the shortening pattern with the relationship of the lesser trochanter to the teardrop would help identify and plan for subtrochanteric shortening osteotomy,especially in high-riding hips.The surgical approach must ensure adequate exposure and soft tissue release to achieve restoration of the anatomical hip centre.The femoral components may require modularity to enable restoration of anteversion and optimum fixation. 展开更多
关键词 Total hip arthroplasty Childhood disorder sequelae TEMPLATING Hip centre restoration Soft tissue release Offset
下载PDF
Ecological Restoration Technologies of Urban Artificial Landscape Lakes
19
作者 Yuyue MA Shengrong YAN +2 位作者 Yi'an CHEN Jiafeng SUN Mingqing CHEN 《Meteorological and Environmental Research》 2024年第3期21-22,31,共3页
Aiming at the problems of water pollution and ecological environment degradation in urban artificial landscape lakes,the ecological restoration technologies of artificial landscape lakes at home and abroad were studie... Aiming at the problems of water pollution and ecological environment degradation in urban artificial landscape lakes,the ecological restoration technologies of artificial landscape lakes at home and abroad were studied to provide some reference for the ecological restoration of urban artificial landscape lakes in China. 展开更多
关键词 Artificial landscape lake Ecological restoration technology CITY
下载PDF
Effects of Vegetation Restoration Age on Soil C:N:P Stoichiometry in Yellow River Delta Coastal Wetland of China
20
作者 CAO Qixue WANG Xiajie +7 位作者 CHU Xiaojing ZHAO Mingliang WANG Lianjing SONG Weimin LI Peiguang ZHANG Xiaoshuai XU Shendong HAN Guangxuan 《Chinese Geographical Science》 SCIE CSCD 2024年第6期1045-1059,共15页
Vegetation restoration can alter carbon(C),nitrogen(N),and phosphorus(P)cycles in coastal wetlands affecting C:N:P stoichiometry.However,the effects of restoration age on soil C:N:P stoichiometry are unclear.In this s... Vegetation restoration can alter carbon(C),nitrogen(N),and phosphorus(P)cycles in coastal wetlands affecting C:N:P stoichiometry.However,the effects of restoration age on soil C:N:P stoichiometry are unclear.In this study,we examined the re-sponses of soil C,N,and P contents and their stoichiometric ratios to vegetation restoration age,focusing on below-ground processes and their relationships to aboveground vegetation community characteristics.We conducted an analysis of temporal gradients based on the'space for time'method to synthesize the effects of restoration age on soil C:N:P stoichiometry in the Yellow River Delta wetland of China.The findings suggest that the combined effects of restoration age and soil depth create complex patterns of shifting soil C:N:P stoichiometry.Specifically,restoration age significantly increased all topsoil C:N:P stoichiometries,except for soil total phosphorus(TP)and the C:N ratio,and slightly affected subsoil C:N:P stoichiometry.The effects of restoration age on the soil C:N ratio was well constrained owing to the coupled relationship between soil organic carbon(SOC)and total nitrogen(TN)contents,while soil TP con-tent was closely related to changes in plant species diversity.Importantly,we found that the topsoil C:N:P stoichiometry was signific-antly affected by plant species diversity,whereas the subsoil C:N:P stoichiometry was more easily regulated by pH and electric con-ductivity(EC).Overall,this study shows that vegetation restoration age elevated SOC and N contents and alleviated N limitation,which is useful for further assessing soil C:N:P stoichiometry in coastal restoration wetlands. 展开更多
关键词 coastal wetland restoration age soil C:N:P stoichiometry soil properties plant species diversity Yellow River Delta of China
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部