检索结果-南通市图书馆

Spatiotemporal evolution and assembly processes of ammonia-oxidizing prokaryotic communities in 1 000-year-old coastal reclaimed soils

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pedosphere 2024年第4期34卷 709-725页

作者： Sarfraz HUSSAIN Yifan YIN Senlin LIU shanshan YAN Dongjie chen Hui CAO feng WANG Key Laboratory of Agricultural Environmental Microbiology Ministry of Agriculture and Rural Affairs College of Life Sciences Nanjing Agricultural University Institute of Eco-Environmental Sciences Ningbo Academy of Agricultural Sciences

Coastal marshes are transitional areas between terrestrial and aquatic ecosystems. They are sensitive to climate change and anthropogenic activities. In recent decades, the reclamation of coastal marshes has greatly increased, and its effects on microbial communities in coastal marshes have been studied with great interest. Most of these studies have explained the short-term spatiotemporal variation in soil microbial community dynamics. However, the impact of reclamation on the community composition and assembly processes of functional microbes(e.g., ammonia-oxidizing prokaryotes) is often ignored. In this study, using quantitative polymerase chain reaction and the Ion S5? XL sequencing platform, we investigated the spatiotemporal dynamics, assembly processes, and diversity patterns of ammonia-oxidizing prokaryotes in 1 000-year-old reclaimed coastal salt marshes. The taxonomic and phylogenetic diversity and composition of ammonia oxidizers showed apparent spatiotemporal variations with soil reclamation. Phylogenetic null modelling-based analysis showed that across all sites, the archaeal ammonia-oxidizing community was assembled by a deterministic process(84.71%), and deterministic processes were also dominant(55.2%) for ammonia-oxidizing bacterial communities except for communities at 60 years of reclamation. The assembly process and nitrification activity in reclaimed soils were positively correlated. The abundance of the amoA gene and changes in ammonia-oxidizing archaeal and bacterial diversities significantly affected the nitrification activity in reclaimed soils. These findings suggest that long-term coastal salt marsh reclamation affects nitrification by modulating the activities of ammonia-oxidizing microorganisms and regulating their community structures and assembly processes. These results provide a better understanding of the effects of long-term land reclamation on soil nitrogen-cycling microbial communities.

关键词： ammonia oxidiser βNTI community assembly coastal salt marshes deterministic nitrification rate stochastic

Squeeze and Excitation Convolution with Shortcut for Complex Plasma Image Recognition

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第8期80卷 2221-2236页

作者： Baoxia Li Wenzhuo chen Xiaojiang Tang Shaohuang bian Yang Liu Junwei Guo Dan Zhang feng Huang College of Information and Electrical Engineering China Agricultural UniversityBeijing100083China College of Science China Agricultural UniversityBeijing100083China

Complex plasma widely exists in thin film deposition,material surface modification,and waste gas treatment in industrial plasma *** complex plasma discharge,the configuration,distribution,and size of particles,as well as the discharge glow,strongly depend on discharge ***,traditional manual diagnosis methods for recognizing discharge parameters from discharge images are complicated to operate with low accuracy,time-consuming and high requirement of *** solve these problems,by combining the two mechanisms of attention mechanism(strengthening the extraction of the channel feature)and shortcut connection(enabling the input information to be directly transmitted to deep networks and avoiding the disappearance or explosion of gradients),the network of squeeze and excitation convolution with shortcut(SECS)for complex plasma image recognition is proposed to effectively improve the model *** results show that the accuracy,precision,recall and F1-Score of our model are superior to other models in complex plasma image recognition,and the recognition accuracy reaches 97.38%.Moreover,the recognition accuracy for the Flowers and Chest X-ray publicly available data sets reaches 97.85%and 98.65%,respectively,and our model has *** study shows that the proposed model provides a new method for the diagnosis of complex plasma images and also provides technical support for the application of plasma in industrial production.

关键词： Image recognition complex plasmas deep learning

Nutritional and lipid profile status of children with spinal muscular atrophy in China:A retrospective case-control study

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2024年第10期137卷 1243-1245页

作者： Yijie feng Jia Wei Mei Yao Jianing Jin Yiqin Cui Qi Long Fei chen Yi Hong Dongming Zhou Jingjing Hu Xiao chen feng Gao Changzheng Yuan shanshan Mao Department of Neurology Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhouZhejiang 310052China Department of Infection Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhouZhejiang 310052China Department of Nutrition Children’s HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhouZhejiang 310052China Children’s Hospital Zhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhouZhejiang 310052China School of Public Health Zhejiang University School of MedicineHangzhouZhejiang 310012China Children’s Hospital School of Public HealthZhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhouZhejiang 310052China

To the Editor:5q spinal muscular atrophy(5qSMA)is an autosomal recessive neuromuscular disorder caused by the lack of the survival motor neuron(SMN)protein encoded by the SMN1 gene,located at 5q11.2-q13.3.[1]The incidence is 1/10,000-1/6000 live births,and the mutation carrier rate in China is 1/42.[1]Spinal muscular atrophy(SMA)is mainly divided into four subtypes:SMA type I,II,III,and IV,based on the motor milestones ever *** I-III occur in children,[1]which often result in progressive muscular atrophy and weakness as well as multi-system dysfunction,including nutritional and metabolic issues.[2]Children with SMA may have hidden nutritional and lipid imbalances,despite normal body appearance and anthropometric measurements,making it difcult to detect early and intervene.

关键词： atrophy muscular children

Cocktail nano-adjuvant enhanced cancer immunotherapy based on NIR-Ⅱ-triggered in-situ tumor vaccination

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第3期35卷 346-351页

作者： Lilin Fan Yanwen feng Jiang bian Anhong chen Donglin Xie Zheng Cao Jun Yue Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials School of Materials Science and EngineeringJiangsu Collaborative Innovation Center of Photovoltaic Science and EngineeringChangzhou UniversityChangzhou 213164China School of Biomedical Engineering Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107China

Second near-infrared(NIR-Ⅱ)light triggered in-situ tumor vaccination(ISTV)represents one of the most promising strategies in boosting the whole-body antitumor *** most of previously developed nano-adjuvants for NIR-Ⅱ-triggered ISTV are“all-in-one”formulations,which may indiscriminately damage both the tumor cells and the immune cells,limiting the overall effect of immune *** overcome this obstacle,we designed a“cocktail”nano-adjuvant by physically mixing hyaluronidases(HAase)-decorated gold nanostars(HA)for NIR-Ⅱlight triggered in situ production of tumor-associated antigens and CpG functionalized gold nanospheres(CA)for immune cells *** to“all-in-one”formulation,the“cocktail”nano-adjuvants displayed a significantly stronger immune response on NIR-Ⅱlight induced dendritic cells(DCs)mutation and T cells differentiation,greater effect on tumor-growth inhibition,and higher efficacy in inhibition of pulmonary *** is more,increasing the molar ratio of HA to CA led to an enhanced anticancer immune *** study highlight the nano-adjuvant formulation effects on the treatment of tumors with multiple targets.

关键词： Nano-adjuvant Cocktail formulation In-situ tumor vaccination NIR-Ⅱphotothermal effect Anticancer immune response

拉曼光谱联合WOA特征筛选的矿井水源识别方法研究

在线全文

学校读者我要写书评

暂无评论

光谱学与光谱分析 2024年第4期44卷 1039-1044页

作者：周茗皓陈小刚崔继峰卞凯胡锋内蒙古工业大学理学院内蒙古呼和浩特010051 安徽理工大学电气与信息工程学院安徽淮南232001

在矿井突水灾害防治过程中,准确、快速判别突水水源类型对煤矿安全生产意义非常重大,而传统的水化学方法存在耗时长、检测复杂等不足,为此提出采用拉曼光谱进行矿井突水水源辨识这一新思路。首先从淮南矿区采集老空水、顶板砂岩裂隙水... 详细信息

在矿井突水灾害防治过程中,准确、快速判别突水水源类型对煤矿安全生产意义非常重大,而传统的水化学方法存在耗时长、检测复杂等不足,为此提出采用拉曼光谱进行矿井突水水源辨识这一新思路。首先从淮南矿区采集老空水、顶板砂岩裂隙水、奥灰水、太灰水和地表水以及它们混合的水样作为实验对象,并借助拉曼光谱系统收集水样的拉曼光谱数据。随后,采用常见的光谱预处理方法对原始拉曼光谱进行降噪。接着,采用鲸鱼优化算法(WOA)对水样的拉曼光谱进行特征信息筛选,得到最能够表征矿井水样的特征拉曼信息。最后,将筛选出的特征拉曼信息作为输入,分别构建BP神经网络(BPNN)、K-近邻算法(KNN)、支持向量机(SVM)、决策树(DT)以及朴素贝叶斯(NB)分类模型,以此来验证拉曼光谱结合WOA筛选特征拉曼信息用于矿井水源识别的可行性。实验证明:利用WOA可以从2048个拉曼数据点中筛选得到102个特征拉曼信息,将拉曼信息的点数缩减为原来的4.98%,而且WOA筛选的特征拉曼信息的建模精度高于全拉曼数据建模精度,此外,采用WOA筛选的特征拉曼信息构建BPNN、KNN、SVM、DT和NB水源辨识模型时,其分析速度都有着不同程度的提升。研究结果表明,采用WOA筛选矿井水源拉曼光谱的特征信息,可以有效地减少拉曼光谱数据的冗余,提升拉曼光谱分析的速度,这可以为矿井水源的快速检测提供借鉴。

关键词：拉曼光谱矿井突水水源识别鲸鱼优化算法特征筛选

SFXN3在头颈部鳞状细胞癌中的表达及其对细胞增殖的影响

在线全文

学校读者我要写书评

暂无评论

上海交通大学学报（医学版） 2024年第4期44卷 427-434页

作者：安俊伊陈必颖陈循睿尹姗姗边洲亮刘峰上海交通大学医学院附属第九人民医院肿瘤科上海201999

目的·分析线粒体相关基因SFXN3(sideroflexin 3)在头颈部鳞状细胞癌(head and neck squamous cell carcinoma,HNSCC)中的表达及其对细胞增殖的影响。方法·从公共数据库获取与线粒体相关的基因和TCGA-HNSCC数据集,使用生物信息学方法... 详细信息

目的·分析线粒体相关基因SFXN3(sideroflexin 3)在头颈部鳞状细胞癌(head and neck squamous cell carcinoma,HNSCC)中的表达及其对细胞增殖的影响。方法·从公共数据库获取与线粒体相关的基因和TCGA-HNSCC数据集,使用生物信息学方法筛选出目标基因SFXN3。使用UALCAN数据库分析SFXN3在HNSCC患者样本中的表达,并根据TCGAHNSCC队列和GEO队列(GSE65858、GSE41613和GSE27020)对不同SFXN3表达水平的患者进行生存分析,使用TCGA-HNSCC队列和GEO队列(GSE40020、GSE210287)在治疗有应答和无应答的患者之间比较SFXN3表达水平差异。通过实时荧光定量PCR(quantitative real-time PCR,qRT-PCR)在收集的HNSCC癌和癌旁组织验证SFXN3的表达情况,并检测SFXN3在人正常口腔上皮细胞和HNSCC肿瘤细胞系中的表达水平。构建稳定敲低SFXN3的HNSCC细胞株,使用Incucyte活细胞成像分析系统和平板克隆形成实验观察SFXN3对HNSCC细胞增殖能力的影响。将稳定敲低SFXN3的细胞和对照组细胞的总RNA进行转录组测序,对敲低组相比对照组差异表达下调的基因进行通路富集分析。结果·SFXN3在HNSCC患者肿瘤组织中高表达(P=0.000),SFXN3高表达组患者预后较差(均P<0.05);治疗无应答者SFXN3表达水平高于有应答者(P=0.008),提示不良预后。并且在收集的HNSCC肿瘤组织和HNSCC细胞系上验证了SFXN3的高表达(均P<0.05)。SFXN3的表达水平敲低后,HNSCC细胞的增殖能力下降,平板克隆形成数目减少(均P<0.05)。RNA测序显示,SFXN3敲低组的HNSCC细胞差异表达下调的基因在DNA复制、细胞周期、线粒体翻译、线粒体RNA代谢过程、线粒体基因表达等通路富集。结论·SFXN3在HNSCC中高表达,与患者预后负相关。HNSCC细胞敲低SFXN3后增殖能力和平板克隆形成能力受到抑制,可能通过影响线粒体功能发挥作用。

关键词： SFXN3 头颈部鳞状细胞癌线粒体细胞增殖

盈余管理能否降低商业银行系统性风险?——基于中国上市银行的证据

在线全文

学校读者我要写书评

暂无评论

金融论坛 2024年第7期 37-47页

作者：顾海峰卞雨晨东华大学旭日工商管理学院上海201620

盈余管理是商业银行财务管理的常用工具,但其风险效应存在被夸大的现象。文章基于2008-2021年中国32家A股上市银行数据,就盈余管理对银行系统性风险的影响展开研究。研究表明:商业银行进行盈余管理能够降低银行系统性风险,并且该影响在... 详细信息

盈余管理是商业银行财务管理的常用工具,但其风险效应存在被夸大的现象。文章基于2008-2021年中国32家A股上市银行数据,就盈余管理对银行系统性风险的影响展开研究。研究表明:商业银行进行盈余管理能够降低银行系统性风险,并且该影响在股份制银行、高资本质量银行和信贷收缩期银行更为明显。机制检验表明:盈余管理主要通过提升银行盈利能力和盈利稳定性、降低影子银行规模和提升银行竞争度来降低银行系统性风险;经济政策不确定性增强会减弱盈余管理对银行系统性风险的抑制作用。

关键词：盈余管理银行系统性风险经济政策不确定性影子银行银行竞争

基于Transformer复杂运动辨识的机动星凸形扩展目标跟踪方法

在线全文

学校读者我要写书评

暂无评论

雷达学报（中英文） 2024年第3期13卷 629-645页

作者：陈辉边斌超连峰韩崇昭兰州理工大学电气工程与信息工程学院兰州730050 西安交通大学自动化科学与工程学院西安710049

针对复杂的机动扩展目标跟踪问题,利用Transformer网络设计了一种有效的星凸不规则形状机动扩展目标跟踪方法。首先,该文研究利用alpha-shape算法建立了星凸形状的变化模型,实现了静态场景下的星凸形扩展目标的形状估计。然后,通过对目... 详细信息

针对复杂的机动扩展目标跟踪问题,利用Transformer网络设计了一种有效的星凸不规则形状机动扩展目标跟踪方法。首先,该文研究利用alpha-shape算法建立了星凸形状的变化模型,实现了静态场景下的星凸形扩展目标的形状估计。然后,通过对目标状态转移矩阵进行重新设计,结合Transformer网络对机动扩展目标运动状态转移矩阵进行实时估计,实现了对复杂机动目标运动过程的精准跟踪。进一步地,将估计得到的形状轮廓与运动状态进行融合,最终实现了对星凸形机动扩展目标的实时跟踪。最后,通过构造复杂的机动扩展目标跟踪场景,利用多重性能指标测试算法对形状和运动状态的综合估计性能,验证了算法的有效性。

关键词：扩展目标跟踪机动目标 Transformer 星凸形弗雷歇距离-面积误差

同方期刊数据库

考虑阻塞分摊和分配公平的微网群竞争交易机制

在线全文

学校读者我要写书评

暂无评论

中国电力 2024年第4期57卷 182-189页

作者：时珊珊冯然方陈刘舒邓莉荣王皓靖陈浦国网上海市电力公司电力科学研究院上海200437 上海电力大学电气工程学院上海200090

节点边际电价机制难以保证微网真实报价,可能导致市场效率损失。同时考虑到输电线路阻塞情况频发,提出一种考虑阻塞分摊和分配公平的微网群竞争交易机制。首先,基于Vickrey-Clarke-Groves(VCG)理论,提出一种促进微网真实报价的支付模型... 详细信息

节点边际电价机制难以保证微网真实报价,可能导致市场效率损失。同时考虑到输电线路阻塞情况频发,提出一种考虑阻塞分摊和分配公平的微网群竞争交易机制。首先,基于Vickrey-Clarke-Groves(VCG)理论,提出一种促进微网真实报价的支付模型;其次,由于VCG类机制的固有问题是收支不平衡,且系统存在阻塞加剧了这一不平衡情况,提出一种基于责任分摊法的系统收支不平衡量处理方法,按照微网对阻塞的影响程度将阻塞成本分摊,并将除去阻塞成本的剩余系统收支不平衡量均摊给消费型微网;最后,仿真结果充分验证了所提机制的有效性。

关键词：价值公平分配激励相容阻塞成本