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自由积C^(*)-代数中的0-1率
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作者 张伦传 郭懋正 《山东航空学院学报》 2024年第4期5-8,共4页
在自由概率论框架下,刻画了非交换情形的Kolmogorov型0-1率和Hewitt-Savage型0-1率。
关键词 自由积C^(*)-代数 Kolmogorov型0-1率 Hewitt-Savage型0-1率
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集成PHAST-Visual Studio的岩溶区燃气管道灾害后果定量分析及应用 被引量:1
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作者 李乔楚 陈军华 《科学技术与工程》 北大核心 2024年第12期5239-5248,共10页
为科学评估岩溶区燃气管道灾害的后果影响程度,基于管道失效特征确定喷射火和蒸气云爆炸两种典型后果模式,研判适用于岩溶区燃气管道灾害的热辐射和冲击波超压危害准则,从危害面积、伤亡人数、经济损失、环境破坏4个维度提出岩溶区燃气... 为科学评估岩溶区燃气管道灾害的后果影响程度,基于管道失效特征确定喷射火和蒸气云爆炸两种典型后果模式,研判适用于岩溶区燃气管道灾害的热辐射和冲击波超压危害准则,从危害面积、伤亡人数、经济损失、环境破坏4个维度提出岩溶区燃气管道灾害后果严重程度的评估模型体系,并结合Visual Studio平台开发“岩溶区燃气管道灾害后果分析软件”。立足岩溶区实际工程案例,结合区域经济社会发展、岩溶自然地质以及燃气管道工程特征,基于PHAST软件仿真分析灾害后果的影响范围,结合危害准则对区内人员、物体提出针对性灾害风险管控措施,并通过引入政府、行业、企业等颁布的标准条例,量化得出灾害后果的影响程度。结果表明:提出的PHAST-Visual Studio集成方法能够弥补以往研究的评估主观性问题,将社会科学思想带入工程风险评价研究,并通过计算机软件编程提高灾害后果分析效率,从而有助于显著控制岩溶区燃气管道灾害后果水平。 展开更多
关键词 PHAST仿真 visual Studio 岩溶区 燃气管道 灾害后果 定量分析
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12C^(6+)辐射对菊苣根黄酮类物质及抗氧化活性的影响
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作者 唐君蔚 曹天光 +4 位作者 秦垒 王慧 范云鹏 刘丽丽 耿金鹏 《核农学报》 CAS CSCD 北大核心 2024年第8期1434-1442,共9页
为探究12C^(6+)辐射对菊苣中黄酮类物质及抗氧化活性的影响,以菊苣根为试验材料,测定不同12C^(6+)辐射剂量下总黄酮含量及抗氧化活性。利用超高效液相色谱-电喷雾串联四级杆质谱仪(UPLC-ESI-MS/MS),对总黄酮含量显著增加的20、40 Gy辐... 为探究12C^(6+)辐射对菊苣中黄酮类物质及抗氧化活性的影响,以菊苣根为试验材料,测定不同12C^(6+)辐射剂量下总黄酮含量及抗氧化活性。利用超高效液相色谱-电喷雾串联四级杆质谱仪(UPLC-ESI-MS/MS),对总黄酮含量显著增加的20、40 Gy辐射组与对照组中黄酮类物质进行靶向代谢组学分析。结果表明,10~40 Gy12C^(6+)辐射均提高了菊苣根总黄酮含量,其中20、40 Gy辐射组含量提升最显著;鉴定出5类11种黄酮类代谢物,橙皮素、氯化矢车菊素-3-O-芸香糖苷是响应12C^(6+)辐射致菊苣根总黄酮含量升高的关键差异代谢物,12C^(6+)辐射影响了紫云英苷、异鼠李素-3-O-葡萄糖苷、木犀草素和橙皮素的合成。类黄酮生物合成途径(ko00941)、黄酮和黄酮醇的生物合成途径(ko00944)富集显著。20、40 Gy剂量辐射提高了菊苣根黄酮提取液的1,1-二苯基-2-三硝基苯肼(DPPH)、2,2’-联氮-双-(3-乙基苯并噻唑啉-6-磺酸)二铵盐(ABTS+)自由基清除能力及铁离子还原能力(FRAP),显著增强了其抗氧化活性。综上,20、40 Gy剂量的12C^(6+)辐射能提高菊苣根中总黄酮含量,改变菊苣根中黄酮类物质种类及含量,并增强其抗氧化活性。本研究结果为进一步研究菊苣辐射诱变育种提供了理论依据。 展开更多
关键词 菊苣 12C^(6+)辐射 UPLC-ESI-MS/MS 黄酮 代谢组学
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12C^(6+)辐照对不同品种油橄榄种子萌发及幼苗生长的影响
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作者 海光辉 王茜 +8 位作者 王贵德 邓煜 张正武 王曙阳 许富强 邸多隆 黄新异 邵瑾 杨桂燕 《经济林研究》 北大核心 2024年第2期29-39,53,共12页
【目的】为油橄榄辐照诱变育种提供理论参考。【方法】以‘皮削利’‘切姆拉尔’‘豆果’‘奇迹’‘阿尔波萨纳’5个品种的种子为试验材料,以5种剂量(0、50、100、150和250 Gy)的12C^(6+)辐照油橄榄种子,播种后统计不同处理下的发芽率... 【目的】为油橄榄辐照诱变育种提供理论参考。【方法】以‘皮削利’‘切姆拉尔’‘豆果’‘奇迹’‘阿尔波萨纳’5个品种的种子为试验材料,以5种剂量(0、50、100、150和250 Gy)的12C^(6+)辐照油橄榄种子,播种后统计不同处理下的发芽率、存活率、鲜质量、株高、总叶数量、根长和侧根数量等7项指标,运用隶属函数法综合评价不同辐照剂量对不同品种油橄榄种子萌发及幼苗生长的影响,并计算半致死辐照剂量。【结果】12C^(6+)辐照对不同品种油橄榄种子发芽率的影响存在差异。随着辐照剂量增加,‘皮削利’和‘切姆拉尔’种子发芽率先升高后降低,‘豆果’‘奇迹’‘阿尔波萨纳’种子发芽率逐渐降低,250 Gy辐照处理下发芽率分别降至11.46%、8.33%、14.58%、7.29%和11.46%。12C^(6+)辐照对各品种油橄榄幼苗的生长有抑制作用。随着辐照剂量增加,鲜质量、株高、总叶数量、根长和侧根数量均逐渐下降,250 Gy辐照处理下均降至最低。12C^(6+)辐照对油橄榄幼苗具有一定的致死效应,且与辐照剂量紧密相关。与种子发芽后40 d时相比,发芽后90 d时各辐照处理下不同品种油橄榄幼苗的存活率均有不同程度的下降。隶属函数分析结果表明,各辐照剂量按照5个品种的总得分由高到低排序,依次均为0、50、100、150、250 Gy,表明不同剂量辐照处理(50~250 Gy)均不同程度地影响了不同品种油橄榄幼苗的长势。5个油橄榄品种按照种子半致死剂量由高到低排序,依次分别为‘豆果’(153.7 Gy)、‘皮削利’(143.5 Gy)、‘切姆拉尔’(129.9 Gy)、‘奇迹’(115.3 Gy)、‘阿尔波萨纳’(108.1 Gy)。【结论】12C^(6+)辐照对不同品种油橄榄种子萌发及幼苗生长整体上有抑制作用,且辐照剂量越大,抑制作用越强。综合考虑发芽率、存活率、幼苗生长等情况,油橄榄种子的适宜辐照剂量为100~150 Gy。 展开更多
关键词 12C^(6+)辐照 油橄榄 种子萌发 幼苗生长
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Visual Modflow在和田县农业经济新区地下水资源评价中的应用 被引量:1
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作者 杭辉 苏前龙 《陕西水利》 2024年第3期27-30,共4页
为全面了解地下水系统受各种激励因素影响后的水动力场和地下水量变化规律,以及为当地地下水资源开发与利用提供科学的指导意见,本次在和田县农业经济新区地下水资源评价中采用可视化标准软件Visnal Modflow实现地下水资源的模拟与预报... 为全面了解地下水系统受各种激励因素影响后的水动力场和地下水量变化规律,以及为当地地下水资源开发与利用提供科学的指导意见,本次在和田县农业经济新区地下水资源评价中采用可视化标准软件Visnal Modflow实现地下水资源的模拟与预报,通过构建三维非稳定流数值模型,使用迭代方法求解,并根据设计开采量对地下水水位变动做出预测,再基于建模预测结果,结合经济新区地下水资源量确定合理的地下水开采量。 展开更多
关键词 visual Modflow 数值模拟 概念模型
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Visual Semantic Segmentation Based on Few/Zero-Shot Learning:An Overview 被引量:2
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作者 Wenqi Ren Yang Tang +2 位作者 Qiyu Sun Chaoqiang Zhao Qing-Long Han 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2024年第5期1106-1126,共21页
Visual semantic segmentation aims at separating a visual sample into diverse blocks with specific semantic attributes and identifying the category for each block,and it plays a crucial role in environmental perception... Visual semantic segmentation aims at separating a visual sample into diverse blocks with specific semantic attributes and identifying the category for each block,and it plays a crucial role in environmental perception.Conventional learning-based visual semantic segmentation approaches count heavily on largescale training data with dense annotations and consistently fail to estimate accurate semantic labels for unseen categories.This obstruction spurs a craze for studying visual semantic segmentation with the assistance of few/zero-shot learning.The emergence and rapid progress of few/zero-shot visual semantic segmentation make it possible to learn unseen categories from a few labeled or even zero-labeled samples,which advances the extension to practical applications.Therefore,this paper focuses on the recently published few/zero-shot visual semantic segmentation methods varying from 2D to 3D space and explores the commonalities and discrepancies of technical settlements under different segmentation circumstances.Specifically,the preliminaries on few/zeroshot visual semantic segmentation,including the problem definitions,typical datasets,and technical remedies,are briefly reviewed and discussed.Moreover,three typical instantiations are involved to uncover the interactions of few/zero-shot learning with visual semantic segmentation,including image semantic segmentation,video object segmentation,and 3D segmentation.Finally,the future challenges of few/zero-shot visual semantic segmentation are discussed. 展开更多
关键词 visual SEGMENTATION SEPARATING
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Heterogeneous Image Knowledge Driven Visual Perception 被引量:1
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作者 Lan Yan Wenbo Zheng Fei-Yue Wang 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2024年第1期255-257,共3页
Dear Editor,This letter is concerned with visual perception closely related to heterogeneous images.Facing the huge challenge brought by different image modalities,we propose a visual perception framework based on het... Dear Editor,This letter is concerned with visual perception closely related to heterogeneous images.Facing the huge challenge brought by different image modalities,we propose a visual perception framework based on heterogeneous image knowledge,i.e.,the domain knowledge associated with specific vision tasks,to better address the corresponding visual perception problems. 展开更多
关键词 visual visual KNOWLEDGE
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^(12)C^(16)O_(2)分子位于1.57μm的饱和吸收光谱
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作者 江山 谈艳 +2 位作者 刘安雯 周晓国 胡水明 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2024年第1期13-18,I0117,共7页
本文展示了基于光梳锁频-光腔衰荡光谱装置测量的^(12)C^(16)O_(2)分子位于1.57μm附近的30012←00001振动带中转动量子数最高为68的共计37根振转跃迁的饱和吸收光谱,其频率确定至kHz水平;文献和CDSD2019数据库中的多普勒光谱确定的3001... 本文展示了基于光梳锁频-光腔衰荡光谱装置测量的^(12)C^(16)O_(2)分子位于1.57μm附近的30012←00001振动带中转动量子数最高为68的共计37根振转跃迁的饱和吸收光谱,其频率确定至kHz水平;文献和CDSD2019数据库中的多普勒光谱确定的30012振动态的振转能级与本工作确定的数值存在超过1 MHz的偏差. 展开更多
关键词 饱和吸收光谱 光腔衰荡光谱 ^(12)C^(16)O_(2) 高精密
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Prevalence of visual impairment and estimation of refractive errors among school children in Kakamega,Kenya 被引量:1
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作者 Isabel Signes-Soler Alfred Ragot +2 位作者 Sheilah Nangena Andrew Wekesa Raúl Montalbán Llamusí 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第5期932-939,共8页
AIM:To investigate the prevalence of visual impairment(VI)and provide an estimation of uncorrected refractive errors in school-aged children,conducted by optometry students as a community service.METHODS:The study was... AIM:To investigate the prevalence of visual impairment(VI)and provide an estimation of uncorrected refractive errors in school-aged children,conducted by optometry students as a community service.METHODS:The study was cross-sectional.Totally 3343 participants were included in the study.The initial examination involved assessing the uncorrected distance visual acuity(UDVA)and visual acuity(VA)while using a+2.00 D lens.The inclusion criteria for a subsequent comprehensive cycloplegic eye examination,performed by an optometrist,were as follows:a UDVA<0.6 decimal(0.20 logMAR)and/or a VA with+2.00 D≥0.8 decimal(0.96 logMAR).RESULTS:The sample had a mean age of 10.92±2.13y(range 4 to 17y),and 51.3%of the children were female(n=1715).The majority of the children(89.7%)fell within the age range of 8 to 14y.Among the ethnic groups,the highest representation was from the Luhya group(60.6%)followed by Luo(20.4%).Mean logMAR UDVA choosing the best eye for each student was 0.29±0.17(range 1.70 to 0.22).Out of the total,246 participants(7.4%)had a full eye examination.The estimated prevalence of myopia(defined as spherical equivalent≤-0.5 D)was found to be 1.45%of the total sample.While around 0.18%of the total sample had hyperopia value exceeding+1.75 D.Refractive astigmatism(cil<-0.75 D)was found in 0.21%(7/3343)of the children.The VI prevalence was 1.26%of the total sample.Among our cases of VI,76.2%could be attributed to uncorrected refractive error.Amblyopia was detected in 0.66%(22/3343)of the screened children.There was no statistically significant correlation observed between age or gender and refractive values.CONCLUSION:The primary cause of VI is determined to be uncorrected refractive errors,with myopia being the most prevalent refractive error observed.These findings underscore the significance of early identification and correction of refractive errors in school-aged children as a means to alleviate the impact of VI. 展开更多
关键词 visual impairment refractive errors MYOPIA AMBLYOPIA sustainable development goals
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Morphological disruption and visual tuning alterations in the primary visual cortex in glaucoma(DBA/2J)mice 被引量:1
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作者 Yin Yang Zhaoxi Yang +9 位作者 Maoxia Lv Ang Jia Junjun Li Baitao Liao Jing’an Chen Zhengzheng Wu Yi Shi Yang Xia Dezhong Yao Ke Chen 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第1期220-225,共6页
Glaucoma is a leading cause of irreve rsible blindness wo rldwide,and previous studies have shown that,in addition to affecting the eyes,it also causes abnormalities in the brain.However,it is not yet clear how the pr... Glaucoma is a leading cause of irreve rsible blindness wo rldwide,and previous studies have shown that,in addition to affecting the eyes,it also causes abnormalities in the brain.However,it is not yet clear how the primary visual cortex(V1)is altered in glaucoma.This study used DBA/2J mice as a model for spontaneous secondary glaucoma.The aim of the study was to compare the electrophysiological and histomorphological chara cteristics of neurons in the V1between 9-month-old DBA/2J mice and age-matched C57BL/6J mice.We conducted single-unit recordings in the V1 of light-anesthetized mice to measure the visually induced responses,including single-unit spiking and gamma band oscillations.The morphology of layerⅡ/Ⅲneurons was determined by neuronal nuclear antigen staining and Nissl staining of brain tissue sections.Eighty-seven neurons from eight DBA/2J mice and eighty-one neurons from eight C57BL/6J mice were examined.Compared with the C57BL/6J group,V1 neurons in the DBA/2J group exhibited weaker visual tuning and impaired spatial summation.Moreove r,fewer neuro ns were observed in the V1 of DBA/2J mice compared with C57BL/6J mice.These findings suggest that DBA/2J mice have fewer neurons in the VI compared with C57BL/6J mice,and that these neurons have impaired visual tuning.Our findings provide a better understanding of the pathological changes that occur in V1 neuron function and morphology in the DBA/2J mouse model.This study might offer some innovative perspectives regarding the treatment of glaucoma. 展开更多
关键词 DBA/2J DEGENERATION gamma band oscillations GLAUCOMA primary visual cortex(V1) RETINA single-unit recording tuning curve
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A Concise and Varied Visual Features-Based Image Captioning Model with Visual Selection
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作者 Alaa Thobhani Beiji Zou +4 位作者 Xiaoyan Kui Amr Abdussalam Muhammad Asim Naveed Ahmed Mohammed Ali Alshara 《Computers, Materials & Continua》 SCIE EI 2024年第11期2873-2894,共22页
Image captioning has gained increasing attention in recent years.Visual characteristics found in input images play a crucial role in generating high-quality captions.Prior studies have used visual attention mechanisms... Image captioning has gained increasing attention in recent years.Visual characteristics found in input images play a crucial role in generating high-quality captions.Prior studies have used visual attention mechanisms to dynamically focus on localized regions of the input image,improving the effectiveness of identifying relevant image regions at each step of caption generation.However,providing image captioning models with the capability of selecting the most relevant visual features from the input image and attending to them can significantly improve the utilization of these features.Consequently,this leads to enhanced captioning network performance.In light of this,we present an image captioning framework that efficiently exploits the extracted representations of the image.Our framework comprises three key components:the Visual Feature Detector module(VFD),the Visual Feature Visual Attention module(VFVA),and the language model.The VFD module is responsible for detecting a subset of the most pertinent features from the local visual features,creating an updated visual features matrix.Subsequently,the VFVA directs its attention to the visual features matrix generated by the VFD,resulting in an updated context vector employed by the language model to generate an informative description.Integrating the VFD and VFVA modules introduces an additional layer of processing for the visual features,thereby contributing to enhancing the image captioning model’s performance.Using the MS-COCO dataset,our experiments show that the proposed framework competes well with state-of-the-art methods,effectively leveraging visual representations to improve performance.The implementation code can be found here:https://github.com/althobhani/VFDICM(accessed on 30 July 2024). 展开更多
关键词 visual attention image captioning visual feature detector visual feature visual attention
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Bioactive material promotes longdistance regeneration of optic nerve to restore visual functions
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作者 Kai Liu 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第1期160-160,共1页
Visual system is vital to human beings.Unfortunately,the optic nerve lacks the ability to regenerate after injury.Therefo re,long-distance regeneration of the optic nerve is a major unsolved medical problem in the wor... Visual system is vital to human beings.Unfortunately,the optic nerve lacks the ability to regenerate after injury.Therefo re,long-distance regeneration of the optic nerve is a major unsolved medical problem in the world(Laha et al.,2017).Recently,Li and So groups' study showed that the bioactive material(ciliary neurotrophic factor[CNTF]-chitosan) could promote long-distance regeneration of the completely transected optic nerve in adult rats and partially restored the visual functions(Liu et al.,2023).This study sheds light on the clinical potential for repairing the severely injured optic nerve. 展开更多
关键词 visual visual FUNCTIONS
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Effect of capsule treatment on visual acuity and quality after phacoemulsification lens implantation in myopic patients with cataract
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作者 Wei Liu Qi Liu +2 位作者 Fang Zhou Bo Feng Wan-Ling Wu 《World Journal of Clinical Cases》 SCIE 2024年第19期3882-3889,共8页
BACKGROUND Cataracts pose a significant clinical burden due to their complex pathogenesis.In recent years,an increase in cataracts coexisting with myopia has heightened the incidence of retinopathy and posterior vitre... BACKGROUND Cataracts pose a significant clinical burden due to their complex pathogenesis.In recent years,an increase in cataracts coexisting with myopia has heightened the incidence of retinopathy and posterior vitreous detachment.Additionally,symptoms of ocular axis elongation,lens nucleus hardening,and vitreous liquefaction have become more prevalent.While conventional extracapsular cataract extraction is commonly employed,it often yields suboptimal visual outcomes.Subsequent advancements in cataract phacoemulsification and lens implantation surgeries have gained widespread acceptance for their ability to improve refraction and significantly improve uncorrected visual acuity.AIM To investigate the effect of capsular treatment after phacoemulsification lens implantation in myopic patients with cataract.METHODS We selected 110 patients(with 134 eyes)with myopia and cataracts treated.These patients were categorized into two groups:an observation group(57 patients with 70 eyes)and a control group(53 patients with 64 eyes).The control group underwent cataract phacoemulsification and lens implantation,while the observation group received a refined capsular treatment based on the control group’s procedure.We assessed the differences in visual acuity and quality between the two groups before and after surgery.RESULTS At six months post-operation,the observation group exhibited significantly improved far vision,intermediate vision,near vision,lower objective scattering index,higher Modulation transfer function cut-off frequency,and overall vision metrics at different contrast levels(100%,20%and 9%)compared to the control group(P<0.05).The total score of the National Eye Institute Visual Function Questionnaire in the observation group at 6 months after operation was significantly higher than that in the control group(P<0.05).No significant difference in the incidence of adverse reactions was observed between the observation group and control group(P>0.05).CONCLUSION Capsular treatment demonstrates efficacy in improving visual acuity and quality after phacoemulsification lens implantation in myopic patients with cataracts,warranting its clinical application. 展开更多
关键词 Capsular treatment MYOPIA CATARACT Phacoemulsification and lens implantation visual acuity visual quality Uncorrected visual acuity
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RMPC-Based Visual Servoing for Trajectory Tracking of Quadrotor UAVs With Visibility Constraints
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作者 Qifan Yang Huiping Li 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2024年第9期2027-2029,共3页
Dear Editor,This letter deals with the tracking problem of quadrotors subject to external disturbances and visibility constraints by designing a robust model predictive control(RMPC) scheme. According to the imagebase... Dear Editor,This letter deals with the tracking problem of quadrotors subject to external disturbances and visibility constraints by designing a robust model predictive control(RMPC) scheme. According to the imagebased visual servoing(IBVS) method, a virtual camera is constructed to express image moments of the tracking target. 展开更多
关键词 visual IMAGE VISIBILITY
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Women in visual neural regeneration research
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作者 Tonia S.Rex David J.Calkins 《Neural Regeneration Research》 SCIE CAS 2025年第2期489-490,共2页
The year 2024 marks the 60^(th)anniversary of Title IX and 25 years since the New York Times revealed bias against female faculty members at the Massachusetts Institute of Technology.We take an opportunity here to exa... The year 2024 marks the 60^(th)anniversary of Title IX and 25 years since the New York Times revealed bias against female faculty members at the Massachusetts Institute of Technology.We take an opportunity here to examine the state of gender bias in a relatively new yet already prominent field,neural regeneration in the visual system,for which there is a well-defined context useful for this purpose.The National Eye Institute(NEI)provided the first round of research funding for its Audacious Goals Initiative(AGI)on visual neural regeneration in 2013 and the last round in 2021.Therefore,we focus on this timespan.Data sources included PubMed,the National Science Foundation(NSF),the NEI,the Blue Ridge Institute for Medical Research and data from the major professional organization for eye and vision research,the Association for Research in Vision and Ophthalmology(ARVO). 展开更多
关键词 NEURAL visual TIMES
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A New Perspective in the Study of Medical History through Visuals
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作者 ZHANG Shujian 《Chinese Medicine and Culture》 2024年第3期183-184,共2页
In pre-modern cultural history,both textual and visual documentation played crucial roles,each possessing its own narrative logic.Historically,text has been a dominant medium for cultural documentation,whereas images,... In pre-modern cultural history,both textual and visual documentation played crucial roles,each possessing its own narrative logic.Historically,text has been a dominant medium for cultural documentation,whereas images,which predate text,have often been undervalued. 展开更多
关键词 visual HISTORY visual
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CICARE based communication technique:A passage to faster and smoother visual rehabilitation in post cataract surgery patients
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作者 Arvind Kumar Morya Ranjan Kumar Behera +1 位作者 Parul Chawla Gupta Arshi Singh 《World Journal of Clinical Cases》 SCIE 2024年第36期6947-6949,共3页
Visual rehabilitation following cataract surgery is often an overlooked aspect.Healthcare providers have an important role in the counselling of the patients undergoing cataract surgery in clearing all their doubts th... Visual rehabilitation following cataract surgery is often an overlooked aspect.Healthcare providers have an important role in the counselling of the patients undergoing cataract surgery in clearing all their doubts thus alleviating all their fears and anxiety related to the procedure which will eventually lead to faster and smoother visual rehabilitation.Using standardised communication techniques like CICARE combined with conventional nursing and pain scoring systems can provide an objective and effective method in patient counselling and building a rapport with the patient for a faster visual recovery. 展开更多
关键词 visual visual FASTER
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基于Visual MODFLOW的天化试剂一厂地下水污染物扩散数值分析
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作者 王鹏 周世冲 +1 位作者 张檑 贾沼霖 《水利与建筑工程学报》 2024年第2期46-54,共9页
为了给城市污染场地的修复和治理提供依据,以天津市化学试剂一厂地块修复项目为例,利用三维模拟软件Visual MODFLOW建立地下水水流概念模型和溶质迁移模型,对风险管控区内氯乙烯等三种污染物进行20年的运移扩散数值模拟预测,并对其运移... 为了给城市污染场地的修复和治理提供依据,以天津市化学试剂一厂地块修复项目为例,利用三维模拟软件Visual MODFLOW建立地下水水流概念模型和溶质迁移模型,对风险管控区内氯乙烯等三种污染物进行20年的运移扩散数值模拟预测,并对其运移过程和分布特征进行分析。结果表明:污染物的运移除了自身的衰减、弥散和吸附等作用外,主要受地下水运动趋势的影响,随着地下水的流向进行扩散,受止水帷幕阻隔的影响,污染物在迁移扩散过程中发生了明显的“绕流现象”。垂直渗透系数较小的相对隔水层对污染晕的垂直扩散阻隔作用明显,浅部含水层中污染物浓度梯度随深度的增加而明显减小。三种污染物浓度均明显低于修复目标控制值。利用Visual MODFLOW建立地下水数值模型,可以预测污染物因子时空分布,定性的分析各种污染物的运移规律。 展开更多
关键词 visual MODFLOW 溶质运移模拟 污染场地修复 数值模拟
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Recent progress in visualization and digitization of coherent transformation structures and application in high-strength steel
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作者 Xuelin Wang Zhenjia Xie +1 位作者 Xiucheng Li Chengjia Shang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第6期1298-1310,共13页
High-strength steels are mainly composed of medium-or low-temperature microstructures,such as bainite or martensite,with coherent transformation characteristics.This type of microstructure has a high density of disloc... High-strength steels are mainly composed of medium-or low-temperature microstructures,such as bainite or martensite,with coherent transformation characteristics.This type of microstructure has a high density of dislocations and fine crystallographic structural units,which ease the coordinated matching of high strength,toughness,and plasticity.Meanwhile,given its excellent welding perform-ance,high-strength steel has been widely used in major engineering constructions,such as pipelines,ships,and bridges.However,visual-ization and digitization of the effective units of these coherent transformation structures using traditional methods(optical microscopy and scanning electron microscopy)is difficult due to their complex morphology.Moreover,the establishment of quantitative relationships with macroscopic mechanical properties and key process parameters presents additional difficulty.This article reviews the latest progress in microstructural visualization and digitization of high-strength steel,with a focus on the application of crystallographic methods in the development of high-strength steel plates and welding.We obtained the crystallographic data(Euler angle)of the transformed microstruc-tures through electron back-scattering diffraction and combined them with the calculation of inverse transformation from bainite or martensite to austenite to determine the reconstruction of high-temperature parent austenite and orientation relationship(OR)during con-tinuous cooling transformation.Furthermore,visualization of crystallographic packets,blocks,and variants based on actual OR and digit-ization of various grain boundaries can be effectively completed to establish quantitative relationships with alloy composition and key process parameters,thereby providing reverse design guidance for the development of high-strength steel. 展开更多
关键词 high-strength steel MICROSTRUCTURE visualIZATION DIGITIZATION quantification mechanical properties
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Vein visualization enhancement by dual-wavelength phase-locked denoising technology
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作者 Lihua Ruan Zhiqin Yin +4 位作者 Shibing Zhou Weibo Zheng Wei Lu Tao Zhang Shaowei Wang 《Journal of Innovative Optical Health Sciences》 SCIE EI CSCD 2024年第3期73-83,共11页
Visual near-infrared imaging equipment has broad applications in various fields such as venipuncture,facial injections,and safety verification due to its noncontact,compact,and portable design.Currently,most studies u... Visual near-infrared imaging equipment has broad applications in various fields such as venipuncture,facial injections,and safety verification due to its noncontact,compact,and portable design.Currently,most studies utilize near-infrared single-wavelength for image acquisition of veins.However,many substances in the skin,including water,protein,and melanin can create significant background noise,which hinders accurate detection.In this paper,we developed a dual-wavelength imaging system with phase-locked denoising technology to acquire vein image.The signals in the effective region are compared by using the absorption valley and peak of hemoglobin at 700nm and 940nm,respectively.The phase-locked denoising algorithm is applied to decrease the noise and interference of complex surroundings from the images.The imaging results of the vein are successfully extracted in complex noise environment.It is demonstrated that the denoising effect on hand veins imaging can be improved with 57.3%by using our dual-wavelength phase-locked denoising technology.Consequently,this work proposes a novel approach for venous imaging with dual-wavelengths and phase-locked denoising algorithm to extract venous imaging results in complex noisy environment better. 展开更多
关键词 DUAL-WAVELENGTH phase-locked denoising vein visualization enhancement.
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