针对现有跨垄式采茶机导航中心线提取效率低的问题,该研究提出一种基于机器视觉跟踪生长ROI茶垄间导航线提取算法。首先采用固定ROI(region of interest)方法,选取图像左下方区域为第一块ROI,在ROI内进行超绿指数灰度化,最大类方差法分...针对现有跨垄式采茶机导航中心线提取效率低的问题,该研究提出一种基于机器视觉跟踪生长ROI茶垄间导航线提取算法。首先采用固定ROI(region of interest)方法,选取图像左下方区域为第一块ROI,在ROI内进行超绿指数灰度化,最大类方差法分割茶垄道路与背景,通过形态学操作对图像进行增强与降噪,使用最大连通域检测操作提取ROI内的坐标信息与特征点,根据ROI提取的坐标信息动态生成ROI,直到整个图像中所有茶垄道路信息提取完成,最后采用最小二乘法获取跨垄式采茶机底盘在垄间行驶的导航线。该方法经过连续帧测试,处理一帧1920×1080像素图像的平均时间为18 ms,该研究算法与人工提取导航线的航向角平均误差为0.405°,标准差为0.463°,可在一定杂草、落叶干扰的情况下完成导航角提取。展开更多
目的:颈前路减压融合术是治疗退行性颈椎病的经典手术方式,钉板的使用增加了融合率及稳定性的同时,间接导致了邻近椎体退变和术后吞咽困难的发生。文章通过Meta分析方法比较ROI-C^(TM)自锁系统和传统融合器联合钉板内固定治疗退行性颈...目的:颈前路减压融合术是治疗退行性颈椎病的经典手术方式,钉板的使用增加了融合率及稳定性的同时,间接导致了邻近椎体退变和术后吞咽困难的发生。文章通过Meta分析方法比较ROI-C^(TM)自锁系统和传统融合器联合钉板内固定治疗退行性颈椎病患者的临床结果和并发症情况,为颈前路减压融合术中内固定方式的选择提供循证学支持。方法:检索中国知网、万方、维普、PubMed、Cochrane Library、Web of Science和Embase数据库,检索关于颈前路减压融合术中应用ROI-C^(TM)自锁系统与融合器联合钉板内固定治疗退行性颈椎病的中英文文献。检索时间范围为各数据库建库至2023年7月。由2名研究者严格按照纳入与排除标准选择文献,采用Cochrane偏倚风险工具对随机对照试验进行质量评价,NOS量表对队列研究进行质量评价。采用RevMan 5.4软件进行Meta分析。结局指标包括手术时间、术中出血量、日本骨科协会(Japanese Orthopaedic Association Scores,JOA)评分、颈椎功能障碍指数、C_(2)-C_(7)Cobb角、融合率、邻近椎体退变发生率、融合器沉降率和吞咽困难发生率。结果:共纳入13项研究,其中回顾性队列研究11项,随机对照试验2项,共1136例患者,ROI-C组569例,融合器联合钉板组567例。Meta分析结果显示:ROI-C组与融合器联合钉板组在手术时间(MD=-15.52,95%CI:-18.62至-12.42,P<0.00001),术中出血量(MD=-24.53,95%CI:-32.46至-16.61,P<0.00001),术后邻近节段退变率(RR=0.40,95%CI:0.27-0.60,P<0.00001)和术后总吞咽困难发生率(RR=0.18,95%CI:0.13-0.26,P<0.00001)均具有显著性差异。两者在术后JOA评分、颈椎功能障碍指数、C_(2)-C_(7)Cobb角、融合率和融合器沉降率方面无显著性差异(P≥0.05)。结论:在颈椎前路减压融合术中应用ROI-C^(TM)自锁系统与传统融合器联合钉板内固定治疗退行性颈椎病均可达到满意的临床效果,ROI-C^(TM)自锁系统操作更加简单,相比融合器联合钉板内固定能明显减少手术时间及术中出血量,在减少术后吞咽困难及邻近节段退变发生率等方面具有明显优势,对于跳跃型颈椎病及邻椎病翻修患者,更加推荐使用ROI-C^(TM)自锁系统。但鉴于其可能存在较高的沉降率,对于多节段且合并融合器沉降高危因素如骨质疏松、椎体终板破损的退行性颈椎病患者,仍建议使用融合器联合钉板内固定。展开更多
针对飞行器导航中传统景象匹配技术计算量大、实时性差,且在惯性导航系统(Inertial Navigation System,INS)误差较大时易失效的问题,提出一种基于动态感兴趣区域(Region of Interest,ROI)和视场几何投影的目标定位方法。该方法采用两阶...针对飞行器导航中传统景象匹配技术计算量大、实时性差,且在惯性导航系统(Inertial Navigation System,INS)误差较大时易失效的问题,提出一种基于动态感兴趣区域(Region of Interest,ROI)和视场几何投影的目标定位方法。该方法采用两阶段流程,先利用组合导航数据和相机几何模型将实时图特征点投影至基准图,并依据INS误差动态外扩生成可靠ROI;再在ROI内利用单应性矩阵进行逆向透视变换和亚像素匹配解算精确相机位姿,实现目标定位。实验结果表明,所提方法通过精准限定搜索范围,显著降低了匹配耗时,在INS位置误差为150 m时成功率仍高于97.4%,有效提升了系统的实时性和可靠性。所提方法通过动态ROI驱动匹配,兼顾了计算效率和抗干扰能力,为复杂环境下的高精度定位提供了实用方案。展开更多
[Objective]The construction of weirs changes the hydraulic characteristics of rivers and affects the structure of phytoplankton communities and the health of aquatic ecosystems in the river.This study aims to explore ...[Objective]The construction of weirs changes the hydraulic characteristics of rivers and affects the structure of phytoplankton communities and the health of aquatic ecosystems in the river.This study aims to explore the nonlinear response relationship between phytoplankton community structure and its driving factors in spring and autumn in Furong Creek under the construction of cascade weirs.[Methods]The structure of phytoplankton communities and related environmental factors were investigated in Furong Creek from 2023 to 2024.This study focused on the analysis of the changes of nutrient concentrations and biomass of phytoplankton in autumn and spring within the same dry season in Furong Creek.Redundancy analysis was used to identify the key factors influencing the structure of phytoplankton communities.The MIKE 11 model was employed to simulate the hydrodynamic changes in the river.Combined with total nitrogen and permanganate index,a GAM model of phytoplankton diversity index and hydrodynamic factors was developed,and the change of phytoplankton diversity after the optimized layout of the cascade weirs was fitted.[Results]The result showed that the annual average value of Shannon-Wiener diversity index of phytoplankton in Furong Creek was 2.79,which was in a state of mild pollution.A total of 239 species from 95 genera in 8 phyla were identified.Among the phytoplankton,Chlorophyta was the dominant group throughout the year in Furong Creek,followed by Bacillariophyta and Cyanophyta.The cell abundance of phytoplankton ranged from 3.11 to 20.64 mg/L and from 0.23 to 6.31 mg/L in spring and autumn,which indicated a clear seasonal succession of phytoplankton community structure.Compared with autumn,the relative abundance of Cyanophyta significantly decreased in spring across the whole river section,while Chrysophyta and Dinophyta showed significant increase at some monitoring sites,leading to water bloom phenomenon and a noticeable decline in the diversity of phytoplankton.The dominant species in the water bodies throughout the year were Cyclotella catenata,Chlorella vulgaris,Scenedesmus bijuga,Scenedesmus quadricauda,Chroomonas acuta,Cryptomonas ovata,and Cryptomonas erosa.Redundancy analysis(RDA)showed that hydrodynamic factors(v,h)and water environmental factors(TN,COD_(Mn))were the main influencing factors of phytoplankton community structure.[Conclusion]The result show that the nutrient concentration,phytoplankton biomass,and density in Furong Creek in spring are significantly higher than in autumn.The GAM model,constructed by combining hydrodynamic and environmental factors,can effectively reflect the nonlinear relationship between phytoplankton diversity index and its driving factors.In spring,with an increase in nutrient concentration,the habitat conditions of low flow speed and high water depths formed by overflow weirs will lead to a decrease in the Shannon-Wiener index of phytoplankton and an intensified risk of eutrophication.However,a reasonable layout scheme of cascade weirs will improve the diversity of phytoplankton and reduce the risk of eutrophication in the river.The findings of this study can help deepen the understanding of the ecological and environmental effects of cascade weir construction in the river.展开更多
Clinical use of corticosteroid （CS） therapy and links with adverse neurological effects CS therapy is widely used in clinical practice worldwide, with ad- ministration of high and multiple doses prescribed for a ran...Clinical use of corticosteroid （CS） therapy and links with adverse neurological effects CS therapy is widely used in clinical practice worldwide, with ad- ministration of high and multiple doses prescribed for a range of disease and injury. Notably, CS have been used since the 1950＇s for the treatment of suspected respiratory distress syndrome, in order to accelerate lung maturation in premature babies, as also in antenatal therapy to pregnant women at risk of preterm birth （Haddad et al., 1956; Shinwell and Eventov-Friedman, 2009; Bonanno and Wapner, 2012）. High dose immunosuppressive CS therapy is also widely used in the treatment of multiple sclerosis （MS） and spinal cord injury （Bracken, 2012; Burton et al., 2012）. However,展开更多
为实现自动驾驶汽车能精准定位、检测且识别出车道线,提出一种基于自适应外接形参ROI(Region of Interest)的车道线搜寻检测算法。首先利用python GUI编程库Tkinter模块创建GUI界面,提供ROI形状选择及参数输入的外接窗口,适应不同需求...为实现自动驾驶汽车能精准定位、检测且识别出车道线,提出一种基于自适应外接形参ROI(Region of Interest)的车道线搜寻检测算法。首先利用python GUI编程库Tkinter模块创建GUI界面,提供ROI形状选择及参数输入的外接窗口,适应不同需求下进行车道线的定位、标注,无需反复更新源码,达到车道线自动“挖掘”的效果;其次以灰度直方图双峰值确定左右车道线的初始位置,利用自适应滑动窗口进行车道线的搜寻,依据统计所属车道线像素点的窗口覆盖率来更新、优化窗口参数。实验仿真证明,该算法不仅简化了程序,提高了车道线检测与识别的稳定性和准确性。展开更多
With the development of society,people are increasingly aware of the importance of education,especially the good education on women.This paper took one of the heroines of a thousand splendid suns——Laila as an exampl...With the development of society,people are increasingly aware of the importance of education,especially the good education on women.This paper took one of the heroines of a thousand splendid suns——Laila as an example to elaborate clearly the significant influence of good education on women's body and mentality.In doing so,it made an attempt to achieve the purpose of giving a deeper understanding of the process,the obstacles and the significant meaning of education on women.It was also hoped that this deeper understanding would lead to greater input into women's education and their more comprehensive involvement in social and economic development.展开更多
Thyroid cancer is a common endocrine malignancy with a rising incidence.Pa-tients often suffer from mental pain due to concerns about recurrence,treatment-related side-effect,and body image changes.Demographic factors...Thyroid cancer is a common endocrine malignancy with a rising incidence.Pa-tients often suffer from mental pain due to concerns about recurrence,treatment-related side-effect,and body image changes.Demographic factors like age,gender,physiological factors such as somatic symptoms and disease stage,co-gnitive-regulatory factors including negative and positive thinking,and social factors like work,economy,education level,and social support all influence their mental state.Existing interventions,including nursing,psychological,and tra-ditional Chinese medicine-based methods,have some benefits but face limitations like short-term effectiveness and lack of standardization.Future research should focus on creating better-defined,long-term,and widely applicable intervention programs and explore positive psychology-based approaches to improve patients'mental well-being and quality of life.展开更多
With the rapid development of the marine economy,marine microbiologically influenced corrosion(MIC)has garnered increasing attention.However,most studies have not analyzed the MIC process over continuous and extended ...With the rapid development of the marine economy,marine microbiologically influenced corrosion(MIC)has garnered increasing attention.However,most studies have not analyzed the MIC process over continuous and extended periods,failing to provide a comprehensive understanding of MIC mechanisms at different stages.In this study,the corrosion behavior of EH36 steel caused by Halomonas titanicae in an aerobic enriched seawater over a 30-d incubation period was investigated driven by big data.The results revealed that the corrosion by H.titanicae against EH36 steel evolved dynamically over time.During the initial stages,the aerobic respiration of H.titanicae consumed significant amounts of oxygen,which suppressed the cathodic oxygen reduction process,thereby inhibiting corrosion compared to the abiotic conditions.As time progressed,the accumulation of corrosion products slowed the abiotic corrosion,while the biotic corrosion accelerated due to a shift from aerobic to anaerobic respiration by H.titanicae,utilizing Fe0 and nitrate as electron donors and acceptors,respectively.The big data results are consistent with the weight loss and electrochemical data,demonstrating the reliability of using big data monitoring techniques to characterize microbial corrosion processes.展开更多
BACKGROUND Identifying factors that influence non-curative resection(NCR)is critical to optimize treatment strategies and improve patient outcomes in patients with early gastric cancer(EGC).AIM To investigate the fact...BACKGROUND Identifying factors that influence non-curative resection(NCR)is critical to optimize treatment strategies and improve patient outcomes in patients with early gastric cancer(EGC).AIM To investigate the factors influencing the NCR of EGC and to evaluate the predictive value of these factors.METHODS The clinical data of 173 patients with EGC admitted between July 2020 and July 2023 were retrospectively collected.According to radical resection criteria,the patients were further divided into curative resection group(n=143)and NCR group(n=30).Clinical information was collected,including surgical method,tumor diameter,tumor site,ulcer formation,depth of invasion,pathological type,and lymph node metastasis.Logistic regression analysis was used to explore the factors affecting non-curable resection.RESULTS Multivariate logistic regression analysis showed that ulcer formation[odds ratio(OR)=3.53;95%confidence interval(CI):1.55-8.01,P=0.003],pathological type(OR=3.73;95%CI:1.60-8.74,P=0.002),tumor diameter(OR=3.15;95%CI:1.40-7.05,P=0.005),tumor location(OR=3.50;95%CI:1.16-10.58,P=0.027),lymph node metastasis(OR=4.40;95%CI:1.83-10.57,P=0.001),and depth of penetration(OR=3.75;95%CI:1.60-8.74,P=0.002)were all risk factors for NCR in EGC patients.Predictive analysis showed varying area under the curve values for factors such as tumor diameter(0.636),tumor location(0.608),ulcer formation(0.652),infiltration depth(0.658),pathological type(0.656),and lymph node metastasis(0.674).CONCLUSION The results suggest that factors such as tumor diameter,tumor location,ulcer formation,depth of invasion,pathological type,and lymph node metastasis increase the risk of NCR in EGC patients.展开更多
Zinc-based alloys are promising biodegradable materials for application in the intestinal environment due to their appropriate degradation rates and favorable biocompatibility.However,the corrosion and degradation of ...Zinc-based alloys are promising biodegradable materials for application in the intestinal environment due to their appropriate degradation rates and favorable biocompatibility.However,the corrosion and degradation of biodegradable zinc alloys in the presence of intestinal microorganisms are seldom investigated.In this study,binary Zn-Mn alloys with 0.4 and 0.8 wt.%Mn content were fabricated using the extrusion process.The corrosion behaviors of pure zinc and Zn-Mn alloys with the existence of Lactobacillus acidophilus,a representative microorganism in the intestinal tract,were systematically investigated.In comparison to pure zinc,both Zn-Mn alloys exhibited enhanced strength and ductility.L.acidophilus significantly accelerated the corrosion of both pure zinc and Zn-Mn alloys by generating acidic agents.The presence of L.acidophilus increased the icorr values for pure zinc,Zn-0.4Mn,and Zn-0.8Mn from 68.7±9.9,33.9±2.3 and 17.1±0.1µA cm^(-2) to 253.5±26.7,167.6±8.7 and 30.6±2.2µA cm^(-2),respectively.The addition of Mn mitigated corrosion by refining grains and reducing the local surface potential difference.Compared to pure zinc,the surface potential difference of Zn-0.8Mn decreased from 31.8±1.7 mV to 11.8±0.9 mV.This study points out the existence of microbiologically influenced corrosion in the intestinal environment and emphasizes its importance in the comprehensive design of biodegradable zinc alloys.展开更多
The large-scale exploitation of vanadium(Ⅴ) bearing minerals has led to a massive accumulation of Ⅴ tailings, of which Ⅴ pollution poses severe ecological risks. Although the mechanisms of Ⅴ stress to the microbia...The large-scale exploitation of vanadium(Ⅴ) bearing minerals has led to a massive accumulation of Ⅴ tailings, of which Ⅴ pollution poses severe ecological risks. Although the mechanisms of Ⅴ stress to the microbial community have been reported, the influential pathways in a multi-medium-containing system, for example, the soil-tailings-groundwater system,are unknown. The dynamic redox conditions and substance exchange within the system exhibited complex Ⅴ stress on the local microbial communities. In this study, the influence pathways of Ⅴ stress to the microbial community in the soil-tailings-groundwater system were first investigated. High Ⅴ contents were observed in groundwater(139.2 ± 0.15 μg/L) and soil(98.0–323.8 ± 0.02 mg/kg), respectively. Distinct microbial composition was observed for soil and groundwater, where soil showed the highest level of diversity and richness. Firmicutes, Proteobacteria, Actinobacteria, and Acidobacteria were dominant in soil and groundwater with a sum relative abundance of around 80 %. Based on redundancy analysis and structural equation models, Ⅴ was one of the vital driving factors affecting microbial communities. Groundwater microbial communities were influenced by Ⅴ via Cr, dissolved oxygen, and total nitrogen, while Fe, Mn, and total phosphorus were the key mediators for Ⅴ to affect soil microbial communities. Ⅴ affected the microbial community via metabolic pathways related to carbonaceous matter, which was involved in the establishment of survival strategies for metal stress. This study provides novel insights into the influence pathways of Ⅴ on the microorganisms in tailings reservoir for pollution bioremediation.展开更多
针对现有加密算法在医学图像加密方面存在的效率低、健壮性差以及加密系统稳定性差的问题,设计一个图像感兴趣区域(Region Of Interest,ROI)加密方法。利用统计方法将医学图像中的规则区域或曲线区域提取出来,随机选取几个像素值进行迭...针对现有加密算法在医学图像加密方面存在的效率低、健壮性差以及加密系统稳定性差的问题,设计一个图像感兴趣区域(Region Of Interest,ROI)加密方法。利用统计方法将医学图像中的规则区域或曲线区域提取出来,随机选取几个像素值进行迭代生成加密密钥,对ROI进行置乱和扩散操作,完成ROI的空间域加密。所提算法在密钥随机性、抗攻击性以及健壮性等方面都表现出较好的性能,相比于同类加密算法表现出明显的优势,可以为医学领域保障患者图像信息安全提供技术支持。展开更多
为解决现有工件分类模型在处理高分辨率图像时非感兴趣区域(region of interest,ROI)的冗余计算问题,提出了1种ROI自适应轮廓驱动裁剪的工件分类网络模型(a workpiece classification network model with ROI adaptive contour-driven c...为解决现有工件分类模型在处理高分辨率图像时非感兴趣区域(region of interest,ROI)的冗余计算问题,提出了1种ROI自适应轮廓驱动裁剪的工件分类网络模型(a workpiece classification network model with ROI adaptive contour-driven cropping,ACDC-ClassNet)。该模型利用轮廓检测定位图像最大轮廓及其中心,据此生成标准化方形ROI裁剪区域,消除背景干扰。该模型采用预训练的50层残差网络(residual network-50 layers,ResNet-50),调整其分类头以适应工件类别数量,实现高效的特征聚焦与分类。结果表明,该ROI裁剪策略平均减少72.15%的冗余区域面积,使模型更专注于工件细节。相较于原始ResNet-50,ACDC-ClassNet在准确率、精确率、召回率、F1分数等指标上分别提升3.83、4.04、3.64、4.13个百分点。同时,该策略也优于高效网络(efficient network,EfficientNet)、视觉变换器(vision transformer,ViT)模型,准确率分别提升8.40、4.27个百分点。ACDC-ClassNet为工业背景下的高效视觉检测提供了新的技术路径。展开更多
The spatial-temporal distribution of charging loads for electric vehicles is influenced by multiple factors,Nowadays,the accuracy of the forecasts needs to be improved and the completeness of the modeling is relativel...The spatial-temporal distribution of charging loads for electric vehicles is influenced by multiple factors,Nowadays,the accuracy of the forecasts needs to be improved and the completeness of the modeling is relatively lacking.Therefore,this paper proposes a method for modeling the charging load of electric vehicles based on the influence of multiple factors.First,an in-depth analysis of the factors affecting the charging load of electric vehicles was conducted.Then,a model of electric vehicle electricity consumption per unit kilometer was constructed based on the influencing factors.Next,the electric vehicle,the charging station,the traffic network and the grid are modeled separately.In addition,a unified model of vehicle-station-road-network was constructed through the interaction and coupling of information between the models.Finally,the spatial-temporal distribution of electric vehicle charging loads was simulated using real data from a region.The study shows that the model is able to simulate the charging load of electric vehicles more accurately.Different traffic flows and areas have a significant impact on the charging load distribution.展开更多
Personalized nursing is a necessary means to improve the satisfaction of emergency pediatric nursing.It can enhance the responsiveness of nursing services,strengthen the emotional connection between nurses and patient...Personalized nursing is a necessary means to improve the satisfaction of emergency pediatric nursing.It can enhance the responsiveness of nursing services,strengthen the emotional connection between nurses and patients,and provide a theoretical basis for clinical practice.Therefore,in the context of the new era,it is necessary to deeply analyze the essence and connotation of personalized nursing,and analyze the existing deficiencies in current emergency pediatric personalized nursing,so as to develop effective improvement plans.Research shows that personalized nursing can significantly improve the satisfaction of emergency pediatric nursing,largely avoid nursing risks,and has strong clinical application value.This article summarizes and explores the research on the influence of personalized nursing on improving the satisfaction of emergency pediatric nursing,and puts forward corresponding views.展开更多
文摘针对现有跨垄式采茶机导航中心线提取效率低的问题,该研究提出一种基于机器视觉跟踪生长ROI茶垄间导航线提取算法。首先采用固定ROI(region of interest)方法,选取图像左下方区域为第一块ROI,在ROI内进行超绿指数灰度化,最大类方差法分割茶垄道路与背景,通过形态学操作对图像进行增强与降噪,使用最大连通域检测操作提取ROI内的坐标信息与特征点,根据ROI提取的坐标信息动态生成ROI,直到整个图像中所有茶垄道路信息提取完成,最后采用最小二乘法获取跨垄式采茶机底盘在垄间行驶的导航线。该方法经过连续帧测试,处理一帧1920×1080像素图像的平均时间为18 ms,该研究算法与人工提取导航线的航向角平均误差为0.405°,标准差为0.463°,可在一定杂草、落叶干扰的情况下完成导航角提取。
文摘目的:颈前路减压融合术是治疗退行性颈椎病的经典手术方式,钉板的使用增加了融合率及稳定性的同时,间接导致了邻近椎体退变和术后吞咽困难的发生。文章通过Meta分析方法比较ROI-C^(TM)自锁系统和传统融合器联合钉板内固定治疗退行性颈椎病患者的临床结果和并发症情况,为颈前路减压融合术中内固定方式的选择提供循证学支持。方法:检索中国知网、万方、维普、PubMed、Cochrane Library、Web of Science和Embase数据库,检索关于颈前路减压融合术中应用ROI-C^(TM)自锁系统与融合器联合钉板内固定治疗退行性颈椎病的中英文文献。检索时间范围为各数据库建库至2023年7月。由2名研究者严格按照纳入与排除标准选择文献,采用Cochrane偏倚风险工具对随机对照试验进行质量评价,NOS量表对队列研究进行质量评价。采用RevMan 5.4软件进行Meta分析。结局指标包括手术时间、术中出血量、日本骨科协会(Japanese Orthopaedic Association Scores,JOA)评分、颈椎功能障碍指数、C_(2)-C_(7)Cobb角、融合率、邻近椎体退变发生率、融合器沉降率和吞咽困难发生率。结果:共纳入13项研究,其中回顾性队列研究11项,随机对照试验2项,共1136例患者,ROI-C组569例,融合器联合钉板组567例。Meta分析结果显示:ROI-C组与融合器联合钉板组在手术时间(MD=-15.52,95%CI:-18.62至-12.42,P<0.00001),术中出血量(MD=-24.53,95%CI:-32.46至-16.61,P<0.00001),术后邻近节段退变率(RR=0.40,95%CI:0.27-0.60,P<0.00001)和术后总吞咽困难发生率(RR=0.18,95%CI:0.13-0.26,P<0.00001)均具有显著性差异。两者在术后JOA评分、颈椎功能障碍指数、C_(2)-C_(7)Cobb角、融合率和融合器沉降率方面无显著性差异(P≥0.05)。结论:在颈椎前路减压融合术中应用ROI-C^(TM)自锁系统与传统融合器联合钉板内固定治疗退行性颈椎病均可达到满意的临床效果,ROI-C^(TM)自锁系统操作更加简单,相比融合器联合钉板内固定能明显减少手术时间及术中出血量,在减少术后吞咽困难及邻近节段退变发生率等方面具有明显优势,对于跳跃型颈椎病及邻椎病翻修患者,更加推荐使用ROI-C^(TM)自锁系统。但鉴于其可能存在较高的沉降率,对于多节段且合并融合器沉降高危因素如骨质疏松、椎体终板破损的退行性颈椎病患者,仍建议使用融合器联合钉板内固定。
文摘[Objective]The construction of weirs changes the hydraulic characteristics of rivers and affects the structure of phytoplankton communities and the health of aquatic ecosystems in the river.This study aims to explore the nonlinear response relationship between phytoplankton community structure and its driving factors in spring and autumn in Furong Creek under the construction of cascade weirs.[Methods]The structure of phytoplankton communities and related environmental factors were investigated in Furong Creek from 2023 to 2024.This study focused on the analysis of the changes of nutrient concentrations and biomass of phytoplankton in autumn and spring within the same dry season in Furong Creek.Redundancy analysis was used to identify the key factors influencing the structure of phytoplankton communities.The MIKE 11 model was employed to simulate the hydrodynamic changes in the river.Combined with total nitrogen and permanganate index,a GAM model of phytoplankton diversity index and hydrodynamic factors was developed,and the change of phytoplankton diversity after the optimized layout of the cascade weirs was fitted.[Results]The result showed that the annual average value of Shannon-Wiener diversity index of phytoplankton in Furong Creek was 2.79,which was in a state of mild pollution.A total of 239 species from 95 genera in 8 phyla were identified.Among the phytoplankton,Chlorophyta was the dominant group throughout the year in Furong Creek,followed by Bacillariophyta and Cyanophyta.The cell abundance of phytoplankton ranged from 3.11 to 20.64 mg/L and from 0.23 to 6.31 mg/L in spring and autumn,which indicated a clear seasonal succession of phytoplankton community structure.Compared with autumn,the relative abundance of Cyanophyta significantly decreased in spring across the whole river section,while Chrysophyta and Dinophyta showed significant increase at some monitoring sites,leading to water bloom phenomenon and a noticeable decline in the diversity of phytoplankton.The dominant species in the water bodies throughout the year were Cyclotella catenata,Chlorella vulgaris,Scenedesmus bijuga,Scenedesmus quadricauda,Chroomonas acuta,Cryptomonas ovata,and Cryptomonas erosa.Redundancy analysis(RDA)showed that hydrodynamic factors(v,h)and water environmental factors(TN,COD_(Mn))were the main influencing factors of phytoplankton community structure.[Conclusion]The result show that the nutrient concentration,phytoplankton biomass,and density in Furong Creek in spring are significantly higher than in autumn.The GAM model,constructed by combining hydrodynamic and environmental factors,can effectively reflect the nonlinear relationship between phytoplankton diversity index and its driving factors.In spring,with an increase in nutrient concentration,the habitat conditions of low flow speed and high water depths formed by overflow weirs will lead to a decrease in the Shannon-Wiener index of phytoplankton and an intensified risk of eutrophication.However,a reasonable layout scheme of cascade weirs will improve the diversity of phytoplankton and reduce the risk of eutrophication in the river.The findings of this study can help deepen the understanding of the ecological and environmental effects of cascade weir construction in the river.
基金funded through grants from the British Neuropathological Society,North Staffordshire Medical Institute and University of Nottingham
文摘Clinical use of corticosteroid （CS） therapy and links with adverse neurological effects CS therapy is widely used in clinical practice worldwide, with ad- ministration of high and multiple doses prescribed for a range of disease and injury. Notably, CS have been used since the 1950＇s for the treatment of suspected respiratory distress syndrome, in order to accelerate lung maturation in premature babies, as also in antenatal therapy to pregnant women at risk of preterm birth （Haddad et al., 1956; Shinwell and Eventov-Friedman, 2009; Bonanno and Wapner, 2012）. High dose immunosuppressive CS therapy is also widely used in the treatment of multiple sclerosis （MS） and spinal cord injury （Bracken, 2012; Burton et al., 2012）. However,
文摘为实现自动驾驶汽车能精准定位、检测且识别出车道线,提出一种基于自适应外接形参ROI(Region of Interest)的车道线搜寻检测算法。首先利用python GUI编程库Tkinter模块创建GUI界面,提供ROI形状选择及参数输入的外接窗口,适应不同需求下进行车道线的定位、标注,无需反复更新源码,达到车道线自动“挖掘”的效果;其次以灰度直方图双峰值确定左右车道线的初始位置,利用自适应滑动窗口进行车道线的搜寻,依据统计所属车道线像素点的窗口覆盖率来更新、优化窗口参数。实验仿真证明,该算法不仅简化了程序,提高了车道线检测与识别的稳定性和准确性。
文摘With the development of society,people are increasingly aware of the importance of education,especially the good education on women.This paper took one of the heroines of a thousand splendid suns——Laila as an example to elaborate clearly the significant influence of good education on women's body and mentality.In doing so,it made an attempt to achieve the purpose of giving a deeper understanding of the process,the obstacles and the significant meaning of education on women.It was also hoped that this deeper understanding would lead to greater input into women's education and their more comprehensive involvement in social and economic development.
文摘Thyroid cancer is a common endocrine malignancy with a rising incidence.Pa-tients often suffer from mental pain due to concerns about recurrence,treatment-related side-effect,and body image changes.Demographic factors like age,gender,physiological factors such as somatic symptoms and disease stage,co-gnitive-regulatory factors including negative and positive thinking,and social factors like work,economy,education level,and social support all influence their mental state.Existing interventions,including nursing,psychological,and tra-ditional Chinese medicine-based methods,have some benefits but face limitations like short-term effectiveness and lack of standardization.Future research should focus on creating better-defined,long-term,and widely applicable intervention programs and explore positive psychology-based approaches to improve patients'mental well-being and quality of life.
基金financially supported by the National Natural Science Foundation of China(Nos.U2106206,52471079,42276212,and 42176043)the Natural Science Foundation of Shandong Province(ZR2024ME047)+1 种基金the National Materials Corrosion and Protection Data Center(No.2023DATAFU20-01)The authors wish to acknowledge Sen Wang,Haiyan Yu,Xiaomin Zhao from State Key Laboratory of Microbial Technology,Shandong University for the assistance in the SEM analysis。
文摘With the rapid development of the marine economy,marine microbiologically influenced corrosion(MIC)has garnered increasing attention.However,most studies have not analyzed the MIC process over continuous and extended periods,failing to provide a comprehensive understanding of MIC mechanisms at different stages.In this study,the corrosion behavior of EH36 steel caused by Halomonas titanicae in an aerobic enriched seawater over a 30-d incubation period was investigated driven by big data.The results revealed that the corrosion by H.titanicae against EH36 steel evolved dynamically over time.During the initial stages,the aerobic respiration of H.titanicae consumed significant amounts of oxygen,which suppressed the cathodic oxygen reduction process,thereby inhibiting corrosion compared to the abiotic conditions.As time progressed,the accumulation of corrosion products slowed the abiotic corrosion,while the biotic corrosion accelerated due to a shift from aerobic to anaerobic respiration by H.titanicae,utilizing Fe0 and nitrate as electron donors and acceptors,respectively.The big data results are consistent with the weight loss and electrochemical data,demonstrating the reliability of using big data monitoring techniques to characterize microbial corrosion processes.
文摘BACKGROUND Identifying factors that influence non-curative resection(NCR)is critical to optimize treatment strategies and improve patient outcomes in patients with early gastric cancer(EGC).AIM To investigate the factors influencing the NCR of EGC and to evaluate the predictive value of these factors.METHODS The clinical data of 173 patients with EGC admitted between July 2020 and July 2023 were retrospectively collected.According to radical resection criteria,the patients were further divided into curative resection group(n=143)and NCR group(n=30).Clinical information was collected,including surgical method,tumor diameter,tumor site,ulcer formation,depth of invasion,pathological type,and lymph node metastasis.Logistic regression analysis was used to explore the factors affecting non-curable resection.RESULTS Multivariate logistic regression analysis showed that ulcer formation[odds ratio(OR)=3.53;95%confidence interval(CI):1.55-8.01,P=0.003],pathological type(OR=3.73;95%CI:1.60-8.74,P=0.002),tumor diameter(OR=3.15;95%CI:1.40-7.05,P=0.005),tumor location(OR=3.50;95%CI:1.16-10.58,P=0.027),lymph node metastasis(OR=4.40;95%CI:1.83-10.57,P=0.001),and depth of penetration(OR=3.75;95%CI:1.60-8.74,P=0.002)were all risk factors for NCR in EGC patients.Predictive analysis showed varying area under the curve values for factors such as tumor diameter(0.636),tumor location(0.608),ulcer formation(0.652),infiltration depth(0.658),pathological type(0.656),and lymph node metastasis(0.674).CONCLUSION The results suggest that factors such as tumor diameter,tumor location,ulcer formation,depth of invasion,pathological type,and lymph node metastasis increase the risk of NCR in EGC patients.
基金financially supported by the National Natural Science Foundation of China(No.52231010).
文摘Zinc-based alloys are promising biodegradable materials for application in the intestinal environment due to their appropriate degradation rates and favorable biocompatibility.However,the corrosion and degradation of biodegradable zinc alloys in the presence of intestinal microorganisms are seldom investigated.In this study,binary Zn-Mn alloys with 0.4 and 0.8 wt.%Mn content were fabricated using the extrusion process.The corrosion behaviors of pure zinc and Zn-Mn alloys with the existence of Lactobacillus acidophilus,a representative microorganism in the intestinal tract,were systematically investigated.In comparison to pure zinc,both Zn-Mn alloys exhibited enhanced strength and ductility.L.acidophilus significantly accelerated the corrosion of both pure zinc and Zn-Mn alloys by generating acidic agents.The presence of L.acidophilus increased the icorr values for pure zinc,Zn-0.4Mn,and Zn-0.8Mn from 68.7±9.9,33.9±2.3 and 17.1±0.1µA cm^(-2) to 253.5±26.7,167.6±8.7 and 30.6±2.2µA cm^(-2),respectively.The addition of Mn mitigated corrosion by refining grains and reducing the local surface potential difference.Compared to pure zinc,the surface potential difference of Zn-0.8Mn decreased from 31.8±1.7 mV to 11.8±0.9 mV.This study points out the existence of microbiologically influenced corrosion in the intestinal environment and emphasizes its importance in the comprehensive design of biodegradable zinc alloys.
基金supported by the National Natural Science Foundation of China(No.42377415)the Natural Science Foundation of Sichuan Province(No.2023NSFSC0811),Sichuan Science and Technology Program(Nos.2021JDTD0013 and 2021YFQ0066)+1 种基金the Science and Technology Major Project of Xizhang Autonomous Region of China(No.XZ202201ZD0004G06)the Everest Scientific Research Program(No.80000-2023ZF11405).
文摘The large-scale exploitation of vanadium(Ⅴ) bearing minerals has led to a massive accumulation of Ⅴ tailings, of which Ⅴ pollution poses severe ecological risks. Although the mechanisms of Ⅴ stress to the microbial community have been reported, the influential pathways in a multi-medium-containing system, for example, the soil-tailings-groundwater system,are unknown. The dynamic redox conditions and substance exchange within the system exhibited complex Ⅴ stress on the local microbial communities. In this study, the influence pathways of Ⅴ stress to the microbial community in the soil-tailings-groundwater system were first investigated. High Ⅴ contents were observed in groundwater(139.2 ± 0.15 μg/L) and soil(98.0–323.8 ± 0.02 mg/kg), respectively. Distinct microbial composition was observed for soil and groundwater, where soil showed the highest level of diversity and richness. Firmicutes, Proteobacteria, Actinobacteria, and Acidobacteria were dominant in soil and groundwater with a sum relative abundance of around 80 %. Based on redundancy analysis and structural equation models, Ⅴ was one of the vital driving factors affecting microbial communities. Groundwater microbial communities were influenced by Ⅴ via Cr, dissolved oxygen, and total nitrogen, while Fe, Mn, and total phosphorus were the key mediators for Ⅴ to affect soil microbial communities. Ⅴ affected the microbial community via metabolic pathways related to carbonaceous matter, which was involved in the establishment of survival strategies for metal stress. This study provides novel insights into the influence pathways of Ⅴ on the microorganisms in tailings reservoir for pollution bioremediation.
文摘针对现有加密算法在医学图像加密方面存在的效率低、健壮性差以及加密系统稳定性差的问题,设计一个图像感兴趣区域(Region Of Interest,ROI)加密方法。利用统计方法将医学图像中的规则区域或曲线区域提取出来,随机选取几个像素值进行迭代生成加密密钥,对ROI进行置乱和扩散操作,完成ROI的空间域加密。所提算法在密钥随机性、抗攻击性以及健壮性等方面都表现出较好的性能,相比于同类加密算法表现出明显的优势,可以为医学领域保障患者图像信息安全提供技术支持。
文摘为解决现有工件分类模型在处理高分辨率图像时非感兴趣区域(region of interest,ROI)的冗余计算问题,提出了1种ROI自适应轮廓驱动裁剪的工件分类网络模型(a workpiece classification network model with ROI adaptive contour-driven cropping,ACDC-ClassNet)。该模型利用轮廓检测定位图像最大轮廓及其中心,据此生成标准化方形ROI裁剪区域,消除背景干扰。该模型采用预训练的50层残差网络(residual network-50 layers,ResNet-50),调整其分类头以适应工件类别数量,实现高效的特征聚焦与分类。结果表明,该ROI裁剪策略平均减少72.15%的冗余区域面积,使模型更专注于工件细节。相较于原始ResNet-50,ACDC-ClassNet在准确率、精确率、召回率、F1分数等指标上分别提升3.83、4.04、3.64、4.13个百分点。同时,该策略也优于高效网络(efficient network,EfficientNet)、视觉变换器(vision transformer,ViT)模型,准确率分别提升8.40、4.27个百分点。ACDC-ClassNet为工业背景下的高效视觉检测提供了新的技术路径。
基金the National Key Research and Development Program of China(No.2021YFB2501602)the National Natural Science Foundation of China(No.52077208)。
文摘The spatial-temporal distribution of charging loads for electric vehicles is influenced by multiple factors,Nowadays,the accuracy of the forecasts needs to be improved and the completeness of the modeling is relatively lacking.Therefore,this paper proposes a method for modeling the charging load of electric vehicles based on the influence of multiple factors.First,an in-depth analysis of the factors affecting the charging load of electric vehicles was conducted.Then,a model of electric vehicle electricity consumption per unit kilometer was constructed based on the influencing factors.Next,the electric vehicle,the charging station,the traffic network and the grid are modeled separately.In addition,a unified model of vehicle-station-road-network was constructed through the interaction and coupling of information between the models.Finally,the spatial-temporal distribution of electric vehicle charging loads was simulated using real data from a region.The study shows that the model is able to simulate the charging load of electric vehicles more accurately.Different traffic flows and areas have a significant impact on the charging load distribution.
文摘Personalized nursing is a necessary means to improve the satisfaction of emergency pediatric nursing.It can enhance the responsiveness of nursing services,strengthen the emotional connection between nurses and patients,and provide a theoretical basis for clinical practice.Therefore,in the context of the new era,it is necessary to deeply analyze the essence and connotation of personalized nursing,and analyze the existing deficiencies in current emergency pediatric personalized nursing,so as to develop effective improvement plans.Research shows that personalized nursing can significantly improve the satisfaction of emergency pediatric nursing,largely avoid nursing risks,and has strong clinical application value.This article summarizes and explores the research on the influence of personalized nursing on improving the satisfaction of emergency pediatric nursing,and puts forward corresponding views.
