检索结果-南通市图书馆

甲状腺乳头状癌侧颈淋巴结转移危险因素的研究进展

在线全文

学校读者我要写书评

暂无评论

医学综述 2024年第9期30卷 1068-1073页

作者：苑冬旭时天意蔡文卿刘晓莉吉林大学中日联谊医院甲状腺外科长春130033

甲状腺乳头状癌(PTC)恶性程度较低,但其早期易发生局部复发和远处转移,颈部淋巴结肿大常是PTC发生淋巴转移的首要表现。当前对PTC的治疗方式主要为原发灶的切除以及中央区淋巴结(CLN)的预防性清扫,对侧颈淋巴结(LLN)的处置策略多采用治... 详细信息

甲状腺乳头状癌(PTC)恶性程度较低,但其早期易发生局部复发和远处转移,颈部淋巴结肿大常是PTC发生淋巴转移的首要表现。当前对PTC的治疗方式主要为原发灶的切除以及中央区淋巴结(CLN)的预防性清扫,对侧颈淋巴结(LLN)的处置策略多采用治疗性清扫,因此准确识别LLN的转移状态对于患者术后生存质量具有重要意义。临床上PTC患者的颈部淋巴结转移多首先发生于CLN,CLN的转移状态可能影响LLN转移,当PTC患者同时合并LLN转移危险因素时常有LLN转移倾向。因此临床医师通过评估CLN并结合临床病理因素可进一步确定LLN的手术决策,为PTC患者提供个体化临床诊治方案。

关键词：甲状腺乳头状癌中央区淋巴结侧颈淋巴结淋巴结转移

基于色彩转换的列车油漆涂层激光清洗检测研究

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

应用激光 2020年第4期40卷 644-648页

作者：张梦樵戴惠新郑云昊方振卫张湘菊罗瑞史天意王春明中车南京浦镇车辆股份有限公司江苏南京210031 华中科技大学材料科学与工程学院湖北武汉430074

针对激光清洗高速列车表面油漆涂层清洗质量难以实时检测这一问题,研究采用基于色彩空间转换技术的视觉检测识别技术。利用高速电耦合元件进行实时彩色图像采集,采用色彩空间转换技术将原有图像从RGB空间转换到HSV空间,针对不同涂层设... 详细信息

针对激光清洗高速列车表面油漆涂层清洗质量难以实时检测这一问题,研究采用基于色彩空间转换技术的视觉检测识别技术。利用高速电耦合元件进行实时彩色图像采集,采用色彩空间转换技术将原有图像从RGB空间转换到HSV空间,针对不同涂层设定阈值进行清洗状态检测,判断不同清洗状态,实现高速列车激光除漆的实时检测。结果表明,基于色彩空间转换的视觉检测技术,可以实现对不同漆层的实时质量检测,满足实时检测需求。

关键词：激光技术激光清洗脉冲激光机器视觉

在线全文

学校读者我要写书评

暂无评论

高温高压环境下煤油液滴蒸发过程实验研究

火箭推进 2017年第2期43卷 25-31,39页

作者：刘松聂万胜苏凌宇石天一刘瑜中国人民解放军装备学院北京101416

应用高速摄影系统和图像处理技术研究了煤油液滴在温度473~773 K、压力1.0~4.0 MPa静止气体环境下的蒸发过程,得到了环境温度与环境压力对煤油液滴特性的影响规律。实验结果表明:环境温度低于573 K时,煤油液滴蒸发D2曲线不符合d2定律;... 详细信息

应用高速摄影系统和图像处理技术研究了煤油液滴在温度473~773 K、压力1.0~4.0 MPa静止气体环境下的蒸发过程,得到了环境温度与环境压力对煤油液滴特性的影响规律。实验结果表明:环境温度低于573 K时,煤油液滴蒸发D2曲线不符合d2定律;环境温度高于673 K低于773 K时,液滴直径变化与d2定律吻合。环境压力对液滴蒸发的影响与环境温度密切相关,环境温度低于473 K时,随着环境压力的升高,液滴蒸发速率变慢;环境温度高于673 K时,随着环境压力的升高液滴蒸发速率加快。

关键词：煤油液滴蒸发特性实验研究

Microphone Array Speech Separation Algorithm Based on TC-ResNet

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第11期69卷 2705-2716页

作者： Lin Zhou Yue Xu tianyi Wang Kun Feng Jingang shi School of Information Science and Engineering Southeast UniversityNanjing210096China Center for Machine Vision and Signal Analysis University of OuluOuluFI-90014Finland

Traditional separation methods have limited ability to handle the speech separation problem in high reverberant and low signal-to-noise ratio(SNR)environments,and thus achieve unsatisfactory *** this study,a convolutional neural network with temporal convolution and residual network(TC-ResNet)is proposed to realize speech separation in a complex acoustic environment.A simplified steered-response power phase transform,denoted as GSRP-PHAT,is employed to reduce the computational *** extracted features are reshaped to a special tensor as the system inputs and implements temporal convolution,which not only enlarges the receptive field of the convolution layer but also significantly reduces the network computational *** blocks are used to combine multiresolution features and accelerate the training procedure.A modified ideal ratio mask is applied as the training *** results demonstrate that the proposed microphone array speech separation algorithm based on TC-ResNet achieves a better performance in terms of distortion ratio,source-to-interference ratio,and short-time objective intelligibility in low SNR and high reverberant environments,particularly in untrained *** indicates that the proposed method has generalization to untrained conditions.

关键词： Residual networks temporal convolution neural networks speech separation

DNA barcoding commercial Chinese caterpillar fungus

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

DNA barcoding commercial Chinese caterpillar fungus

一款基于B2C区块链的大学生社区服务与交易软件

中药与天然药高峰论坛暨第十二届全国中药和天然药物学术研讨会

作者： Li Xiang~a,Jingyuan Song~a,tianyi Xin~a,Linchun shi~a,Yingjie Zhu~a,Hui Yao~a,Xiaohui Pang~a, shilin Chen~(a,b,*) a National Engineering Laboratory for Breeding of Endangered Medicinal Materials,Institute of Medicinal Plant Development,Chinese Academy of Medical Sciences & Peking Union Medical College,Beijing 100193,China. b China Academy of Chinese Medical Sciences,Beijing 100700,China.

Chinese caterpillar fungus {Cordyceps sinensis)has been widely and famously used as a precious tonic in the long history of Asian *** the price of *** is higher than that of gold,counterfeits of *** have appeared on the market and are difficult to identify because they are morphologically very similar to *** this study,the DNA barcode ITS/ITS2 was used to distinguish between *** and counterfeits or closely related *** PCR amplification efficiency,differential intra- and inter-specific divergences,DNA barcode gap, and identification ability were used to test the applicability of this DNA barcode.A total of 131 ITS/ITS2 sequences of *** and 19 counterfeits or closely related species were used for the *** results showed that the PCR amplification rate of *** was 100%,the distributions of inter- and intra-specific variation of ITS and ITS2 exhibited distinct barcode gaps, and the identification efficiencies based on the BLAST1,nearest genetic distance,and NJ tree methods were 100%.In summary,the ITS/ITS2 sequence was an ideal DNA barcode to unequivocally distinguish *** from counterfeits or closely related ***,it is also a powerful,although not perfect,tool for identifying the genuine production areas for C. *** barcoding could also be used to ensure the safe use of ***.

关键词： Chinese caterpillar fungus Cordyceps sinensis DNA Barcode ITS/ITS2 Species identification

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

科技资讯 2021年第12期19卷 1-5页

作者：史天一王德程王震彭世强姬五胜孙光天津职业技术师范大学电子工程学院天津300222 天津光电通信技术有限公司通信系统室天津300211

在当前的电子商务交易模式中,用户的流动性极大,具有很高的随机性,且存在一定的安全隐患。为了克服这种不足,该项目构建基于大学生O2O社区服务与B2C线下交易的互动平台软件。利用去中心化区块链技术,打造以内部虚拟资金生态系统为互动平... 详细信息

在当前的电子商务交易模式中,用户的流动性极大,具有很高的随机性,且存在一定的安全隐患。为了克服这种不足,该项目构建基于大学生O2O社区服务与B2C线下交易的互动平台软件。利用去中心化区块链技术,打造以内部虚拟资金生态系统为互动平台,创造以高效无障碍的价值传递服务。该平台同时支持虚拟代币ICO众筹,通过平台帮助大学生进行各种VC投资。后期无需任何第三方资金介入,全部以纯净大学生的自营价值链做运维框架。

关键词：区块链 B2C O2O 大学生社区服务和交易

在线全文

学校读者我要写书评

暂无评论

斑蝥酸钠抗癌作用的生化特点

核技术 1984年第2期 73-74页

作者：周爱如陈明崔天一侯元怡史晓玲北京医学院

应用斑蝥治疗肿瘤在我国有着悠久的历史。在此基础上,近年来发展了一组斑蝥素衍生物的新抗癌药物,斑蝥酸钠(Disodium Cantharidate,以下简称“斑钠”)即属其中之一。临床资料表明,斑钠对肝癌、食道癌等恶性肿瘤有一定疗效,而无明显抑制... 详细信息

应用斑蝥治疗肿瘤在我国有着悠久的历史。在此基础上,近年来发展了一组斑蝥素衍生物的新抗癌药物,斑蝥酸钠(Disodium Cantharidate,以下简称“斑钠”)即属其中之一。临床资料表明,斑钠对肝癌、食道癌等恶性肿瘤有一定疗效,而无明显抑制造血功能等不良副作用。关于斑钠抗癌作用的机理,目前尚很少报道。本实

关键词： ~3H-胸苷参入 ~3H-亮氨酸参入抗癌作用斑蝥酸钠艾氏腹水癌

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

应用高分子铂络合物催化合成硅烷偶联剂

高分子学报 1988年第4期 290-295页

作者：柳京镐史天义胡春野江英彦中国科学技术大学应用化学系中国科学院化学研究所中国科学院化学研究所合肥北京

以二氧化硅为载体的侧链上含有配位基团和-COOH的聚硅氧烷(1-5)分别与氯铂酸反应制备了五种聚硅氧烷-铂络合物(“St-Pt-l”—“St-Pt-5”).这些高分子铂络合物,用于催化环氧丙基烯丙基醚与三甲及基氢硅烷反应具有很高的催化活性,在温和... 详细信息

以二氧化硅为载体的侧链上含有配位基团和-COOH的聚硅氧烷(1-5)分别与氯铂酸反应制备了五种聚硅氧烷-铂络合物(“St-Pt-l”—“St-Pt-5”).这些高分子铂络合物,用于催化环氧丙基烯丙基醚与三甲及基氢硅烷反应具有很高的催化活性,在温和的条件下(80℃,30min),反应以72—98％的产率生成了硅烷偶联剂γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷.通过对含,配位基的高分子铂络合物“Si-Pt-1”的稳定性研究,发现它可以重复使用多次而不降低其催化活性.

关键词：聚硅氧烷铂络合物催化剂硅氢加成硅烷偶联剂

A novel intelligent chromo capsule endoscope for the diagnosis of neoplastic lesions in the gastrointestinal tract

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Gastroenterology Report 2023年第1期11卷 291-299页

作者： Huiying shi Suya Pang Fanhua Ming tianyi Yangdai Shuxin Tian Rong Lin Department of Gastroenterology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubeiP.R.China Ankon Technologies Co. LtdWuhanHubeiP.R.China Department of Gastroenterology The First Affiliated Hospital of Medical CollegeShihezi UniversityShiheziXinjiangP.R.China

Background:Chromoendoscopy has not been fully integrated into capsule *** study aimded to develop and validate a novel intelligent chromo capsule endoscope(ICCE).Methods:The ICCE has two modes:a white-light imaging(WLI)mode and an intelligent chromo imaging(ICI)*** performance of the ICCE in observing colors,animal tissues,and early gastrointestinal(GI)neoplastic lesions in humans was *** captured by the ICCE were analysed using variance of Laplacian(VoL)values or image contrast ***:For color observation,conventional narrow-band imaging endoscopes and the ICI mode of the ICCE have similar spectral *** with the WLI mode,the ICI mode had significantly higher VoL values for animal tissues(2.15461.044 vs 3.80061.491,P=0.003),gastric precancerous lesions and early gastric cancers(2.24260.162 vs 6.64260.919,P<0.001),and colon tumors(3.89661.430 vs 11.88267.663,P<0.001),and significantly higher contrast for differentiating tumor and non-tumor areas(0.06960.046 vs 0.14460.076,P=0.005).More importantly,the sensitivity,specificity,and accuracy of the ICI mode for early GI tumors were 95.83%,91.67%,and 94.64%,respectively,which were significantly higher than the values of the WLI mode(78.33%[P<0.001],77.08%[P=0.01],and 77.98%[P<0.001],respectively).Conclusions:We successfully integrated ICI into the capsule *** ICCE is an innovative and useful tool for differential diagnosis based on contrast-enhanced images and thus has great potential as a superior diagnostic tool for early GI tumor detection.

关键词： capsule endoscopy chromoendoscopy intelligent chromo capsule endoscope white-light imaging intelligent chromo imaging