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Ultrahigh-brightness 50 MeV electron beam generation from laser wakefield acceleration in a weakly nonlinear regime
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作者 Zhongtao Xiang Changhai Yu +8 位作者 Zhiyong Qin Xuhui Jiao Jiahui Cheng Qiaoxuan Zhou Gatie Axi Jianghua Jie Ya Huang Jintan Cai Jiansheng Liu 《Matter and Radiation at Extremes》 SCIE EI CSCD 2024年第3期4-10,共7页
We propose an efficient scheme to produce ultrahigh-brightness tens of MeV electron beams by designing a density-tailored plasma to induce a wakefield in the weakly nonlinear regime with a moderate laser energy of 120... We propose an efficient scheme to produce ultrahigh-brightness tens of MeV electron beams by designing a density-tailored plasma to induce a wakefield in the weakly nonlinear regime with a moderate laser energy of 120 mJ.In this scheme,the second bucket of the wakefield can have a much lower phase velocity at the steep plasma density down-ramp than the first bucket and can be exploited to implement longitudinal electron injection at a lower laser intensity,leading to the generation of bright electron beams with ultralow emittance together with low energy spread.Three-dimensional particle-in-cell simulations are carried out and demonstrate that high-quality electron beams with a peak energy of 50 MeV,ultralow emittance of28 nm rad,energy spread of 1%,charge of 4.4 pC,and short duration less than 5 fs can be obtained within a 1-mm-long tailored plasma density,resulting in an ultrahigh six-dimensional brightness B6D,n of2×1017 A/m2/0.1%.By changing the density parameters,tunable bright electron beams with peak energies ranging from 5 to 70 MeV,a small emittance of B0.1 mm mrad,and a low energy spread at a few-percent level can be obtained.These bright MeV-class electron beams have a variety of potential applications,for example,as ultrafast electron probes for diffraction and imaging,in laboratory astrophysics,in coherent radiation source generation,and as injectors for GeV particle accelerators. 展开更多
关键词 weakly nonlinear ACCELERATION
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Local saliency consistency-based label inference for weakly supervised salient object detection using scribble annotations
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作者 Shuo Zhao Peng Cui +1 位作者 Jing Shen Haibo Liu 《CAAI Transactions on Intelligence Technology》 SCIE EI 2024年第1期239-249,共11页
Recently,weak supervision has received growing attention in the field of salient object detection due to the convenience of labelling.However,there is a large performance gap between weakly supervised and fully superv... Recently,weak supervision has received growing attention in the field of salient object detection due to the convenience of labelling.However,there is a large performance gap between weakly supervised and fully supervised salient object detectors because the scribble annotation can only provide very limited foreground/background information.Therefore,an intuitive idea is to infer annotations that cover more complete object and background regions for training.To this end,a label inference strategy is proposed based on the assumption that pixels with similar colours and close positions should have consistent labels.Specifically,k-means clustering algorithm was first performed on both colours and coordinates of original annotations,and then assigned the same labels to points having similar colours with colour cluster centres and near coordinate cluster centres.Next,the same annotations for pixels with similar colours within each kernel neighbourhood was set further.Extensive experiments on six benchmarks demonstrate that our method can significantly improve the performance and achieve the state-of-the-art results. 展开更多
关键词 label inference salient object detection weak supervision
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Negative Stiffness Mechanism on An Asymmetric Wave Energy Converter by Using A Weakly Nonlinear Potential Model
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作者 Sunny Kumar POGULURI Dongeun KIM Yoon Hyeok BAE 《China Ocean Engineering》 SCIE EI CSCD 2024年第4期689-700,共12页
Salter's duck,an asymmetrical wave energy converter(WEC)device,showed high efficiency in extracting energy from 2D regular waves in the past;yet,challenges remain for fluctuating wave conditions.These can potentia... Salter's duck,an asymmetrical wave energy converter(WEC)device,showed high efficiency in extracting energy from 2D regular waves in the past;yet,challenges remain for fluctuating wave conditions.These can potentially be addressed by adopting a negative stiffness mechanism(NSM)in WEC devices to enhance system efficiency,even in highly nonlinear and steep 3D waves.A weakly nonlinear model was developed which incorporated a nonlinear restoring moment and NSM into the linear formulations and was applied to an asymmetric WEC using a time domain potential flow model.The model was initially validated by comparing it with published experimental and numerical computational fluid dynamics results.The current results were in good agreement with the published results.It was found that the energy extraction increased in the range of 6%to 17%during the evaluation of the effectiveness of the NSM in regular waves.Under irregular wave conditions,specifically at the design wave conditions for the selected test site,the energy extraction increased by 2.4%,with annual energy production increments of approximately 0.8MWh.The findings highlight the potential of NSM in enhancing the performance of asymmetric WEC devices,indicating more efficient energy extraction under various wave conditions. 展开更多
关键词 asymmetric wave energy converter negative stiffness mechanism weakly nonlinear potential flow POWER
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Enhancing lead-free photovoltaic performance:Minimizing buried surface voids in tin perovskite films through weakly polar solvent pre-treatment strategy
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作者 Dongdong Yan Han Zhang +7 位作者 Chensi Gong Hailong Wang Qing Lu Jun Liu Wenzhen Lv Mingguang Li Runfeng Chen Ligang Xu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第11期556-561,共6页
Buried interfacial voids have always been a notorious phenomenon observed in the fabrication of lead perovskite films. The existence of interfacial voids at the buried interface will capture the carrier, suppress carr... Buried interfacial voids have always been a notorious phenomenon observed in the fabrication of lead perovskite films. The existence of interfacial voids at the buried interface will capture the carrier, suppress carrier transport efficiencies, and affect the stability of photovoltaic devices. However, the impact of these buried interfacial voids on tin perovskites, a promising avenue for advancing lead-free photovoltaics, has been largely overlooked. Here, we utilize an innovative weakly polar solvent pretreatment strategy(WPSPS) to mitigate buried interfacial voids of tin perovskites. Our investigation reveals the presence of numerous voids in tin perovskites during annealing, attributed to trapped dimethyl sulfoxide(DMSO) used in film formation. The WPSPS method facilitates accelerated DMSO evaporation, effectively reducing residual DMSO. Interestingly, the WPSPS shifts the energy level of PEDOT:PSS downward, making it more aligned with the perovskite. This alignment enhances the efficiency of charge carrier transport. As the result, tin perovskite film quality is significantly improved,achieving a maximum power conversion efficiency approaching 12% with only an 8.3% efficiency loss after 1700 h of stability tests, which compares well with the state-of-the-art stability of tin-based perovskite solar cells. 展开更多
关键词 Tin perovskite Buried interfacial weakly polar solvent pre-treatment strategy
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Macro-micro behaviors and failure mechanism of frozen weakly cemented mudstone
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作者 Xianzhou Lyu Jijie Du +2 位作者 Hao Fu Dawei Lyu Weiming Wang 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2024年第4期1337-1347,共11页
Understanding the mechanical properties and multiscale failure mechanism of frozen soft rock is an important prerequisite for the construction safety of tunnels,artificially frozen ground and other infrastructure in c... Understanding the mechanical properties and multiscale failure mechanism of frozen soft rock is an important prerequisite for the construction safety of tunnels,artificially frozen ground and other infrastructure in cold regions.In this study,the triaxial compression test are performed on mudstone in the weakly cemented soft rock strata in the mining area of western China,and the mechanical characteristics and failure mechanism of weakly cemented mudstone are systematically investigated under the combined action of freezing and loading.Furthermore,the quantitative relationship between the microstructural parameters and the macroscopic strength and deformation parameters is established based on fractal theory.Thus,the failure mechanism of frozen weakly cemented mudstone is revealed on both micro- and macro-scales.The results show that temperature and confining pressure significantly affects the elastic modulus and peak strength of weakly cemented mudstone.With decreasing temperature,the compressive strength increases,while the corresponding peak strain decreases gradually.On the deformation curve,the plastic deformation stage is shortened,and the brittle fracture feature at the post-peak stage is more prominent,and the elastic modulus correspondingly increases with decreasing temperature.Under low-temperature conditions,most of the weakly cemented mudstone undergoes microscopic shear failure along the main fracture surface.The micro-fracture morphology characteristics of weakly cemented mudstone under different temperatures are quantified via the fractal dimension,and an approximately exponential relationship can be obtained among the fractal dimension and the temperature,compressive strength and elastic modulus. 展开更多
关键词 weakly cemented mudstone Artificial freezing Mechanical properties Linkage destruction mechanism Fractal dimension
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Weakly Supervised Network with Scribble-Supervised and Edge-Mask for Road Extraction from High-Resolution Remote Sensing Images
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作者 Supeng Yu Fen Huang Chengcheng Fan 《Computers, Materials & Continua》 SCIE EI 2024年第4期549-562,共14页
Significant advancements have been achieved in road surface extraction based on high-resolution remote sensingimage processing. Most current methods rely on fully supervised learning, which necessitates enormous human... Significant advancements have been achieved in road surface extraction based on high-resolution remote sensingimage processing. Most current methods rely on fully supervised learning, which necessitates enormous humaneffort to label the image. Within this field, other research endeavors utilize weakly supervised methods. Theseapproaches aim to reduce the expenses associated with annotation by leveraging sparsely annotated data, such asscribbles. This paper presents a novel technique called a weakly supervised network using scribble-supervised andedge-mask (WSSE-net). This network is a three-branch network architecture, whereby each branch is equippedwith a distinct decoder module dedicated to road extraction tasks. One of the branches is dedicated to generatingedge masks using edge detection algorithms and optimizing road edge details. The other two branches supervise themodel’s training by employing scribble labels and spreading scribble information throughout the image. To addressthe historical flaw that created pseudo-labels that are not updated with network training, we use mixup to blendprediction results dynamically and continually update new pseudo-labels to steer network training. Our solutiondemonstrates efficient operation by simultaneously considering both edge-mask aid and dynamic pseudo-labelsupport. The studies are conducted on three separate road datasets, which consist primarily of high-resolutionremote-sensing satellite photos and drone images. The experimental findings suggest that our methodologyperforms better than advanced scribble-supervised approaches and specific traditional fully supervised methods. 展开更多
关键词 Semantic segmentation road extraction weakly supervised learning scribble supervision remote sensing image
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Influence of confined water on the limit support pressure of tunnel face in weakly water-rich strata
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作者 LI Yun-fa WU Guo-jun +2 位作者 CHEN Wei-zhong YUAN Jing-qiang HUO Meng-zhe 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第8期2844-2859,共16页
In the process of shield tunneling through soft soil layers,the presence of confined water ahead poses a significant threat to the stability of the tunnel face.Therefore,it is crucial to consider the impact of confine... In the process of shield tunneling through soft soil layers,the presence of confined water ahead poses a significant threat to the stability of the tunnel face.Therefore,it is crucial to consider the impact of confined water on the limit support pressure of the tunnel face.This study employed the finite element method(FEM)to analyze the limit support pressure of shield tunnel face instability within a pressurized water-containing layer.Subsequently,a multiple linear regression approach was applied to derive a concise solution formula for the limit support pressure,incorporating various influencing factors.The analysis yields the following conclusions:1)The influence of confined water on the instability mode of the tunnel face in soft soil layers makes the displacement response of the strata not significant when the face is unstable;2)The limit support pressure increases approximately linearly with the pressure head,shield tunnel diameter,and tunnel burial depth.And inversely proportional to the thickness of the impermeable layer,soil cohesion and internal friction angle;3)Through an engineering case study analysis,the results align well with those obtained from traditional theoretical methods,thereby validating the rationality of the equations proposed in this paper.Furthermore,the proposed equations overcome the limitation of traditional theoretical approaches considering the influence of changes in impermeable layer thickness.It can accurately depict the dynamic variation in the required limit support pressure to maintain the stability of the tunnel face during shield tunneling,thus better reflecting engineering reality. 展开更多
关键词 weakly water-rich strata confined aquifer limit support pressure finite element method multiple linear regression
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血清sTWEAK、Netrin-1联合APACHEⅡ评分对重型颅脑损伤患者术后预后不良的预测价值
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作者 沈晨 施巍 +2 位作者 张元杰 杨治荣 程华怡 《国际检验医学杂志》 CAS 2024年第4期404-409,415,共7页
目的探讨血清可溶性肿瘤坏死因子样凋亡弱诱导因子(sTWEAK)、神经轴突导向因子-1(Netrin-1)联合急性生理学与慢性健康状况评分系统Ⅱ(APACHEⅡ)评分对重型颅脑损伤患者术后预后不良的预测价值。方法选取2020年6月至2022年6月该院收治的... 目的探讨血清可溶性肿瘤坏死因子样凋亡弱诱导因子(sTWEAK)、神经轴突导向因子-1(Netrin-1)联合急性生理学与慢性健康状况评分系统Ⅱ(APACHEⅡ)评分对重型颅脑损伤患者术后预后不良的预测价值。方法选取2020年6月至2022年6月该院收治的120例重型颅脑损伤患者,根据术后30 d预后情况分为预后良好组和预后不良组。对比两组血清sTWEAK、Netrin-1水平及APACHEⅡ评分。采用单因素和多因素Logistic回归分析重型颅脑损伤患者术后预后不良的影响因素,并据以构建血清sTWEAK、Netrin-1及APACHEⅡ评分联合应用的预测模型,受试者工作特征(ROC)曲线分析血清sTWEAK、Netrin-1水平及APACHEⅡ评分对重型颅脑损伤患者术后预后不良的预测价值。结果预后不良组的重症监护室居住时间长于预后良好组,白蛋白水平、入院时格拉斯哥昏迷评分法评分和血清Netrin-1水平低于预后良好组,多发脑挫裂伤占比、机械通气占比、入院时APACHEⅡ评分和血清sTWEAK、血清肌酐、血尿素氮水平均高于预后良好组,差异有统计学意义(P<0.05)。多因素Logistic回归分析结果显示,多发脑挫裂伤、Netrin-1水平降低、入院时APACHEⅡ评分升高、sTWEAK水平升高为重型颅脑损伤患者术后预后不良的危险因素(P<0.05)。ROC曲线分析结果显示,血清sTWEAK、Netrin-1及APACHEⅡ评分3个指标单独及联合应用时曲线下面积及其95%CI分别为0.742(0.552~0.925)、0.731(0.488~0.963)、0.714(0.502~0.911)、0.882(0.795~0.947)。结论血清sTWEAK、Netrin-1联合APACHEⅡ评分对重型颅脑损伤患者术后预后不良具有较好的预测价值,可为临床治疗方案的制订提供参考。 展开更多
关键词 重型颅脑损伤 可溶性肿瘤坏死因子样凋亡弱诱导因子 神经轴突导向因子-1 急性生理学与慢性健康状况评分系统Ⅱ 预后
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自发性急性脑出血患者血浆sCD163/sTWEAK比值与预后的关系
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作者 张文超 杨雪辉 +2 位作者 尹涛 王睿健 张盟盟 《天津医药》 CAS 2024年第3期297-301,共5页
目的探究自发性急性脑出血(ACH)患者血浆可溶性CD163(sCD163)/可溶性肿瘤坏死因子样凋亡弱诱导因子(sTWEAK)比值与预后的关系。方法纳入ACH患者90例作为病例组,根据格拉斯哥预后评分将病例组分为预后不良组(38例)和预后良好组(52例);另... 目的探究自发性急性脑出血(ACH)患者血浆可溶性CD163(sCD163)/可溶性肿瘤坏死因子样凋亡弱诱导因子(sTWEAK)比值与预后的关系。方法纳入ACH患者90例作为病例组,根据格拉斯哥预后评分将病例组分为预后不良组(38例)和预后良好组(52例);另选取同期体检健康者45例为对照组。酶联免疫吸附试验检测血浆sCD163、sTWEAK水平并计算sCD163/sTWEAK比值。分析血浆sCD163、sTWEAK水平及sCD163/sTWEAK比值与临床资料的相关性;Logistic回归分析ACH患者预后不良的影响因素;受试者工作特征(ROC)曲线分析sCD163/sTWEAK比值对ACH患者预后不良的预测价值。结果病例组血浆sCD163、sTWEAK水平及sCD163/sTWEAK比值均显著高于对照组;预后良好组上述指标均低于预后不良组(P<0.05)。预后良好组血肿体积、美国国立卫生研究院卒中量表(NIHSS)评分、高血压及幕下出血比例均低于预后不良组,低密度脂蛋白胆固醇(LDL-C)高于预后不良组(P<0.05)。相关性分析表明,血浆sCD163、sTWEAK水平及sCD163/sTWEAK比值与出血部位、血肿体积、NIHSS评分、白细胞计数、血小板计数、中性粒细胞/淋巴细胞比值(NLR)呈正相关(P<0.05)。Logistic回归分析显示,sCD163/sTWEAK比值、出血部位、血肿体积、NIHSS评分为ACH患者预后不良的影响因素(P<0.05)。ROC曲线结果表明,sCD163/sTWEAK比值评估ACH患者预后不良的AUC为0.850,敏感度和特异度分别为86.84%和69.23%。结论sCD163/sTWEAK比值在ACH患者血浆中水平较高,并与预后不良有关,该值对此类患者的预后有一定预测价值。 展开更多
关键词 脑出血 细胞因子Tweak 预后 可溶性血红蛋白清道夫受体163蛋白 可溶性肿瘤坏死因子样凋亡弱诱导因子
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注意缺陷多动障碍患儿血清ACE2,TWEAK和CCL5水平检测及诊断价值研究
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作者 王立宁 史亚楠 李宝广 《现代检验医学杂志》 CAS 2024年第5期152-156,167,共6页
目的 探究血清血管紧张素转换酶2(angiotensin-converting enzyme 2,ACE2),细胞因子肿瘤坏死因子样细胞凋亡弱诱导因子(tumor necrosis factor-like weak inducer of apoptosis,TWEAK)和CC趋化因子配体5(CC motif chemokine ligand 5,CC... 目的 探究血清血管紧张素转换酶2(angiotensin-converting enzyme 2,ACE2),细胞因子肿瘤坏死因子样细胞凋亡弱诱导因子(tumor necrosis factor-like weak inducer of apoptosis,TWEAK)和CC趋化因子配体5(CC motif chemokine ligand 5,CCL5)水平在注意缺陷多动障碍(attention deficit hyperactivity disorder,ADHD)患儿诊断、病情严重程度评估中的价值。方法 选取2022年10月~2023年10月在河北省儿童医院就诊的125例ADHD患儿记为ADHD组,另选105例在河北省妇幼保健中心体检的健康儿童为对照组,根据临床总体印象严重程度量表(CGI-S)将患儿分为轻中度组(n=83)和重度组(n=42)。ELISA方法检测血清ACE2,TWEAK,CCL5,促黄体生成素(LH)和催乳素(PRL)水平,联合型瑞文测验(CRT)和Conners父母症状问卷(PSQ)对患儿认知和行为状况进行评分。Spearman相关性分析重度组血清ACE2,TWEAK,CCL5与CGI-S,CRT,PSQ评分的相关性;受试者工作特征(ROC)曲线分析ACE2,TWEAK,CCL5对ADHD及严重程度的诊断价值。结果 ADHD患儿血清ACE2(284.35±92.34 pg/ml),TWEAK(2.56±0.76 pg/ml)水平低于对照组(379.23±106.28 pg/ml,3.52±1.12 pg/ml),CCL5水平(7.36±2.37ng/ml)高于对照组(5.24±1.63 ng/ml),差异具有统计学意义(t=7.244,7.703,7.753,均P<0.05);重度组患儿CRT,血清ACE2,TWEAK水平低于轻中度组(t=5.318,6.686,6.490),而PSQ,CCL5水平较高于轻中度组(t=5.220,6.134),差异具有统计学意义(均P<0.05);Spearman相关性分析结果显示,重度组患儿血清ACE2,TWEAK水平与CGI-S,PSQ评分负相关(r=-0.432,-0.453;-0.421,-0.426,均P<0.001),与CRT评分呈正相关(r=0.427,0.418,均P<0.001);CCL5与CGI-S,PSQ评分呈正相关(r=0.421,0.433,均P<0.001),与CRT评分呈负相关(r=-0.446,P<0.001)。血清ACE2,TWEAK和CCL5诊断ADHD发生的AUC分别为0.814,0.803和0.807,三者联合诊断的AUC为0.945,优于各自单独诊断(Z=5.439,4.258,5.576,均P<0.001);血清ACE2,TWEAK,CCL5诊断重度ADHD的AUC分别为0.853,0.796和0.805,三者联合诊断的AUC为0.930,优于各自单独诊断(Z=2.604,3.851,3.567,均P<0.001)。结论 血清ACE2,TWEAK在ADHD患儿血清中低表达,而CCL5高表达,三者表达水平具有相关性,并且诊断ADHD发生和严重程度具有较高的价值。 展开更多
关键词 注意缺陷多动障碍 血管紧张素转换酶2 细胞因子肿瘤坏死因子样细胞凋亡弱诱导因子 CC趋化因子配体5
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Significant risk factors for intensive care unit-acquired weakness:A processing strategy based on repeated machine learning 被引量:9
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作者 Ling Wang Deng-Yan Long 《World Journal of Clinical Cases》 SCIE 2024年第7期1235-1242,共8页
BACKGROUND Intensive care unit-acquired weakness(ICU-AW)is a common complication that significantly impacts the patient's recovery process,even leading to adverse outcomes.Currently,there is a lack of effective pr... BACKGROUND Intensive care unit-acquired weakness(ICU-AW)is a common complication that significantly impacts the patient's recovery process,even leading to adverse outcomes.Currently,there is a lack of effective preventive measures.AIM To identify significant risk factors for ICU-AW through iterative machine learning techniques and offer recommendations for its prevention and treatment.METHODS Patients were categorized into ICU-AW and non-ICU-AW groups on the 14th day post-ICU admission.Relevant data from the initial 14 d of ICU stay,such as age,comorbidities,sedative dosage,vasopressor dosage,duration of mechanical ventilation,length of ICU stay,and rehabilitation therapy,were gathered.The relationships between these variables and ICU-AW were examined.Utilizing iterative machine learning techniques,a multilayer perceptron neural network model was developed,and its predictive performance for ICU-AW was assessed using the receiver operating characteristic curve.RESULTS Within the ICU-AW group,age,duration of mechanical ventilation,lorazepam dosage,adrenaline dosage,and length of ICU stay were significantly higher than in the non-ICU-AW group.Additionally,sepsis,multiple organ dysfunction syndrome,hypoalbuminemia,acute heart failure,respiratory failure,acute kidney injury,anemia,stress-related gastrointestinal bleeding,shock,hypertension,coronary artery disease,malignant tumors,and rehabilitation therapy ratios were significantly higher in the ICU-AW group,demonstrating statistical significance.The most influential factors contributing to ICU-AW were identified as the length of ICU stay(100.0%)and the duration of mechanical ventilation(54.9%).The neural network model predicted ICU-AW with an area under the curve of 0.941,sensitivity of 92.2%,and specificity of 82.7%.CONCLUSION The main factors influencing ICU-AW are the length of ICU stay and the duration of mechanical ventilation.A primary preventive strategy,when feasible,involves minimizing both ICU stay and mechanical ventilation duration. 展开更多
关键词 Intensive care unit-acquired weakness Risk factors Machine learning PREVENTION Strategies
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血清sTWEAK、sLOX-1与H型高血压合并HFpEF患者颈动脉粥样硬化的关系
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作者 姜金钟 郭华 +2 位作者 苗维 田守森 田雯艳 《广东医学》 CAS 2024年第10期1226-1230,共5页
目的研究血清可溶性肿瘤坏死因子样凋亡弱诱导因子(sTWEAK)、可溶性凝集素样氧化型低密度脂蛋白受体-1(sLOX-1)与H型高血压合并射血分数保留的心力衰竭(HFpEF)患者颈动脉粥样硬化的关系。方法选取2021年2月至2023年3月沧州中西医结合医... 目的研究血清可溶性肿瘤坏死因子样凋亡弱诱导因子(sTWEAK)、可溶性凝集素样氧化型低密度脂蛋白受体-1(sLOX-1)与H型高血压合并射血分数保留的心力衰竭(HFpEF)患者颈动脉粥样硬化的关系。方法选取2021年2月至2023年3月沧州中西医结合医院收治的161例H型高血压合并HFpEF患者,按是否发生颈动脉粥样硬化分为硬化组与非硬化组。同期选取80例于我院体检的健康的志愿者作为对照组。收集受试者的临床资料,采用酶联免疫吸附法检测血清sTWEAK、sLOX-1水平,比较H型高血压合并HFpEF患者与对照组血清sTWEAK、sLOX-1水平,采用多因素logistic回归分析患者发生颈动脉粥样硬化的影响因素,受试者工作特征(ROC)曲线分析血清sTWEAK、sLOX-1对患者发生颈动脉粥样硬化的预测价值。结果161例患者中65例发生颈动脉粥样硬化,发生率为40.37%(65/161),未发生颈动脉粥样硬化者96例。两组在年龄、吸烟、血脂四项等方面比较,差异有统计学意义(P<0.05)。硬化组与非硬化组血清sTWEAK水平低于对照组,sLOX-1水平高于对照组(P<0.05);且硬化组sTWEAK水平低于非硬化组,sLOX-1水平高于非硬化组(P<0.05)。多因素logistic回归分析显示,HDL-C、sTWEAK、年龄、LDL-C、sLOX-1水平是患者发生颈动脉粥样硬化的影响因素(P<0.05)。ROC曲线显示,血清sTWEAK、sLOX-1联合检测对发生颈动脉粥样硬化的预测曲线下面积(AUC)为0.842,预测效能高于两指标单独检测。结论H型高血压合并HFpEF患者的血清sTWEAK水平下降、sLOX-1水平上升,与颈动脉粥样硬化发生有关,两者联合检测对颈动脉粥样硬化的发生具有一定预测价值。 展开更多
关键词 H型高血压 射血分数保留心力衰竭 颈动脉粥样硬化 可溶性肿瘤坏死因子样凋亡弱诱导因子 可溶性凝集素样氧化型低密度脂蛋白受体-1
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Inverse Faraday effect of weakly relativistic full Poincaré beams in plasma
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作者 Wei Liu Qing Jia Jian Zheng 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2023年第1期43-52,共10页
The inverse Faraday effect(IFE),which usually refers to the phenomenon in which a quasi-static axial magnetic field is self-generated when a circularly polarized beam propagates in a plasma,has rarely been studied for... The inverse Faraday effect(IFE),which usually refers to the phenomenon in which a quasi-static axial magnetic field is self-generated when a circularly polarized beam propagates in a plasma,has rarely been studied for lasers with unconventional polarization states.In this paper,IFE is reconsidered for weakly relativistic full Poincarébeams,which can contain all possible laser polarization states.Starting from cold electron fluid equations and the conservation of generalized vorticity,a self-consistent theoretical model combining the nonlinear azimuthal current and diamagnetic current is presented.The theoretical results show that when such a laser propagates in a plasma,an azimuthally varying quasi-static axial magnetic field can be generated,which is quite different from the circularly polarized case.These results are qualitatively and quantitatively verified by three-dimensional particle-in-cell simulations.Our work extends the theoretical understanding of the IFE and provides a new degree of freedom in the design of magnetized plasma devices. 展开更多
关键词 POINCARÉ weakly FARADAY
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A robust & weak-nucleophilicity electrocatalyst with an inert response for chlorine ion oxidation in large-current seawater electrolysis 被引量:1
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作者 Junting Dong Chang Yu +5 位作者 Hui Wang Lin Chen Hongling Huang Yingnan Han Qianbing Wei Jieshan Qiu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第3期486-495,I0011,共11页
Seawater splitting into hydrogen,a promising technology,is seriously limited by the durability and tolerance of electrocatalysts for chlorine ions in seawater at large current densities due to chloride oxidation and c... Seawater splitting into hydrogen,a promising technology,is seriously limited by the durability and tolerance of electrocatalysts for chlorine ions in seawater at large current densities due to chloride oxidation and corrosion.Here,we present a robust and weak-nucleophilicity nickel-iron hydroxide electrocatalyst with excellent selectivity for oxygen evolution and an inert response for chlorine ion oxidation which are key and highly desired for efficient seawater electrolysis.Such a weak-nucleophilicity electrocatalyst can well match with strong-nucleophilicity OH-compared with the weak-nucleophilicity Cl^(-),resultantly,the oxidation of OH-in electrolyte can be more easily achieved relative to chlorine ion oxidation,confirmed by ethylenediaminetetraacetic acid disodium probing test.Further,no strongly corrosive hypochlorite is produced when the operating voltage reaches about 2.1 V vs.RHE,a potential that is far beyond the thermodynamic potential of chlorine ion oxidatio n.This concept and approach to reasonably designing weaknucleophilicity electrocatalysts that can greatly avoid chlorine ion oxidation under alkaline seawater environments can push forward the seawater electrolysis technology and also accelerate the development of green hydrogen technique. 展开更多
关键词 Nickel-iron hydroxide electrocatalysts Highly selective seawater electrolysis weak nucleophilicity Oxygen evolution reaction Hydrogen
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Deep Learning Models Based on Weakly Supervised Learning and Clustering Visualization for Disease Diagnosis
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作者 Jingyao Liu Qinghe Feng +4 位作者 Jiashi Zhao Yu Miao Wei He Weili Shi Zhengang Jiang 《Computers, Materials & Continua》 SCIE EI 2023年第9期2649-2665,共17页
The coronavirus disease 2019(COVID-19)has severely disrupted both human life and the health care system.Timely diagnosis and treatment have become increasingly important;however,the distribution and size of lesions va... The coronavirus disease 2019(COVID-19)has severely disrupted both human life and the health care system.Timely diagnosis and treatment have become increasingly important;however,the distribution and size of lesions vary widely among individuals,making it challenging to accurately diagnose the disease.This study proposed a deep-learning disease diagnosismodel based onweakly supervised learning and clustering visualization(W_CVNet)that fused classification with segmentation.First,the data were preprocessed.An optimizable weakly supervised segmentation preprocessing method(O-WSSPM)was used to remove redundant data and solve the category imbalance problem.Second,a deep-learning fusion method was used for feature extraction and classification recognition.A dual asymmetric complementary bilinear feature extraction method(D-CBM)was used to fully extract complementary features,which solved the problem of insufficient feature extraction by a single deep learning network.Third,an unsupervised learning method based on Fuzzy C-Means(FCM)clustering was used to segment and visualize COVID-19 lesions enabling physicians to accurately assess lesion distribution and disease severity.In this study,5-fold cross-validation methods were used,and the results showed that the network had an average classification accuracy of 85.8%,outperforming six recent advanced classification models.W_CVNet can effectively help physicians with automated aid in diagnosis to determine if the disease is present and,in the case of COVID-19 patients,to further predict the area of the lesion. 展开更多
关键词 CLASSIFICATION COVID-19 deep learning SEGMENTATION unsupervised learning weakly supervised
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Tuning desolvation kinetics of in-situ weakly solvating polyacetal electrolytes for dendrite-free lithium metal batteries
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作者 Peng Wen Yimin Liu +8 位作者 Jinyan Mao Xiaotong Liu Weiping Li Yang Ren Yang Zhou Fei Shao Mao Chen Jun Lin Xinrong Lin 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第4期340-347,共8页
The host structure of polymers significantly influences ion transport and interfacial stability of electrolytes,dictating battery cycle life and safety for solid-state lithium metal batteries.Despite promising propert... The host structure of polymers significantly influences ion transport and interfacial stability of electrolytes,dictating battery cycle life and safety for solid-state lithium metal batteries.Despite promising properties of ethylene oxide-based electrolytes,their typical clamp-like coordination geometry leads to crowd solvation sheath and overly strong interactions between Li^(+)and electrolytes,rendering difficult dissociation of Li+and unfavorable solid electrolyte interface(SEI).Herein,we explore weakly solvating characteristics of polyacetal electrolytes owing to their alternately changing intervals between–O–coordinating sites in the main chain.Such structural asymmetry leads to unique distorted helical solvation sheath,and can effectively reduce Li^(+)-electrolyte binding and tune Li^(+)desolvation kinetics in the insitu formed polymer electrolytes,yielding anion-derived SEI and dendrite-free Li electrodeposition.Combining with photoinitiated cationic ring-opening polymerization,polyacetal electrolytes can be instantly formed within 5 min at the surface of electrode,with high segmental chain motion and well adapted interfaces.Such in-situ polyacetal electrolytes enabled more than 1300-h of stable lithium electrodeposition and prolonged cyclability over 200 cycles in solid-state batteries at ambient temperatures,demonstrating the vital role of molecular structure in changing solvating behavior and Li deposition stability for high-performance electrolytes. 展开更多
关键词 Polymer electrolyte In-situ photoinitiated polymerization weakly solvating effect POLYACETAL Lithium electrodeposition
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Weakly Supervised Abstractive Summarization with Enhancing Factual Consistency for Chinese Complaint Reports
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作者 Ren Tao Chen Shuang 《Computers, Materials & Continua》 SCIE EI 2023年第6期6201-6217,共17页
A large variety of complaint reports reflect subjective information expressed by citizens.A key challenge of text summarization for complaint reports is to ensure the factual consistency of generated summary.Therefore... A large variety of complaint reports reflect subjective information expressed by citizens.A key challenge of text summarization for complaint reports is to ensure the factual consistency of generated summary.Therefore,in this paper,a simple and weakly supervised framework considering factual consistency is proposed to generate a summary of city-based complaint reports without pre-labeled sentences/words.Furthermore,it considers the importance of entity in complaint reports to ensure factual consistency of summary.Experimental results on the customer review datasets(Yelp and Amazon)and complaint report dataset(complaint reports of Shenyang in China)show that the proposed framework outperforms state-of-the-art approaches in ROUGE scores and human evaluation.It unveils the effectiveness of our approach to helping in dealing with complaint reports. 展开更多
关键词 Automatic summarization abstractive summarization weakly supervised training entity recognition
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Anion-Regulated Weakly Solvating Electrolytes for High-Voltage Lithium Metal Batteries
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作者 Zhipeng Jiang Jisheng Mo +5 位作者 Chen Li Haiwen Li Qingan Zhang Ziqi Zeng Jia Xie Yongtao Li 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第6期259-265,共7页
Development of advanced high-voltage electrolytes is key to achieving high-energy-density lithium metal batteries(LMBs).Weakly solvating electrolytes(WSE)can produce unique anion-driven interphasial chemistry via alte... Development of advanced high-voltage electrolytes is key to achieving high-energy-density lithium metal batteries(LMBs).Weakly solvating electrolytes(WSE)can produce unique anion-driven interphasial chemistry via altering the solvating power of the solvent,but it is difficult to dissolve the majority of Li salts and fail to cycle at a cut-off voltage above 4.5 V.Herein,we present a new-type WSE that is regulated by the anion rather than the solvent,and the first realize stable cycling of dimethoxyethane(DME)at 4.6 V without the use of the“solvent-in-salt”strategy.The relationships between the degree of dissociation of salts,the solvation structure of electrolytes,and the electrochemical performance of LMBs were systematically investigated.We found that LiBF_(4),which has the lowest degree of dissociation,can construct an anion-rich inner solvation shell,resulting in anion-derived anode/cathode interphases.Thanks to such unusual solvation structure and interphasial chemistry,the Li-LiCoO_(2)full cell with LiBF_(4)-based WSE could deliver excellent rate performance(115 mAh g^(-1)at 10 C)and outstanding cycling stability even under practical conditions,including high loading(10.7 mg cm^(-2)),thin Li(50μm),and limited electrolyte(1.2μL mg^(-1)). 展开更多
关键词 high-voltage LiCoO_(2) lithium metal batteries solvation structure weakly solvating electrolyte
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An Experimental Study on the Reinforcement of Weakly-Consolidated Shallow Formation in Deep Water Using an Epoxy Resin-Based Fluid
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作者 Leiju Tian Yuhuan Bu +1 位作者 Huajie Liu Lingyun Zhao 《Fluid Dynamics & Materials Processing》 EI 2023年第5期1215-1226,共12页
The mechanical properties of Portland cement differ from the weakly consolidated shallow formation in deep water.This results in undesired abrupt changes in the compressive strength and elastic modulus at the cement–... The mechanical properties of Portland cement differ from the weakly consolidated shallow formation in deep water.This results in undesired abrupt changes in the compressive strength and elastic modulus at the cement–formation interface.In this study,a water-borne epoxy resin was applied as a strengthening material to reinforce the weakly consolidated shallow formation and protect the cement sheath from potential failure.The mechanical properties of the unconsolidated clay were tested,including their changes with increases in the temperature and curing time.In addition,the effects of the seawater,cement slurry alkaline filtrate,and saltwater drilling fluid were evaluated.As confirmed by the results,the strengthening fluid was excellent at reinforcing the unconsolidated clay,with a compressive strength of 2.49 MPa(after curing for 7 days),even at a dosage of 5%.A cement slurry filtrate with a high pH was suitable to produce the required strengthening of the formation,especially its early age strength.It should also be pointed out that the used fluid exhibited good compatibility with the saltwater drilling fluid and seawater behaved well as a diluent for the strengthening fluid. 展开更多
关键词 MANUSCRIPT compressive strength deepwater oil and gas well well cementing epoxy resin weakly consolidated shallow formation
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血清Gal-3、TWEAK对精神分裂症的诊断价值及与精神症状严重程度的关系 被引量:1
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作者 权涛涛 柏林 +1 位作者 于洋 张丹 《检验医学与临床》 2024年第6期800-804,共5页
目的研究血清半乳糖凝集素3(Gal-3)、肿瘤坏死因子样弱凋亡诱导因子(TWEAK)对精神分裂症的诊断价值及与精神症状严重程度的关系。方法选取2019年3月至2021年3月在该院诊治的96例精神分裂症患者作为病例组,以同期60例健康体检者为对照组... 目的研究血清半乳糖凝集素3(Gal-3)、肿瘤坏死因子样弱凋亡诱导因子(TWEAK)对精神分裂症的诊断价值及与精神症状严重程度的关系。方法选取2019年3月至2021年3月在该院诊治的96例精神分裂症患者作为病例组,以同期60例健康体检者为对照组,进行回顾性分析。采用酶联免疫吸附试验检测血清Gal-3、TWEAK水平。采用Pearson相关分析血清Gal-3、TWEAK水平与临床指标的相关性;采用多因素Logistic回归分析影响精神分裂症发生的因素;采用受试者工作特征(ROC)曲线分析血清Gal-3、TWEAK单项及联合检测对精神分裂症的诊断价值。结果观察组PANSS评分总分、阳性症状评分、阴性症状评分、一般精神病理学症状评分及血清Gal-3、TWEAK水平均高于对照组,差异均有统计学意义(P<0.001)。血清Gal-3、TWEAK水平与PANSS评分总分、阳性症状评分、阴性症状评分、一般精神病理学症状评分呈正相关(P<0.001)。PANSS评分总分、阳性症状评分、一般精神病理学症状评分升高及血清Gal-3、TWEAK水平升高均是精神分裂症发生的独立危险因素(P<0.001)。血清Gal-3、TWEAK联合检测诊断精神分裂症的曲线下面积为0.870(95%CI:0.831~0.919),明显高于血清Gal-3、TWEAK单项检测诊断精神分裂症的AUC[0.812(95%CI:0.769~0.847)、0.820(95%CI:0.771~0.852)],差异均有统计学意义(Z=4.345,P<0.001;Z=4.010,P=0.002)。结论精神分裂症患者血清Gal-3、TWEAK水平升高,二者与精神症状严重程度有关,血清Gal-3、TWEAK联合检测对精神分裂症具有较高的诊断价值。 展开更多
关键词 精神分裂症 半乳糖凝集素3 肿瘤坏死因子样弱凋亡诱导因子 诊断 精神症状
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