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Gallium nitride blue laser diodes with pulsed current operation exceeding 15 W in optical output power

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Journal of Semiconductors 2024年第11期45卷 13-17页

作者： Shuiqing Li qiangqiang guo Heqing Deng Zhibai Zhong Jinjian Zheng LiXun Yang Jiangyong Zhang Changzheng Sun Zhibiao Hao Bing Xiong Yanjun Han Jian Wang Hongtao Li Lin Gan Lai Wang Yi Luo Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Anhui GaN Semiconductor Co. Ltd.Luan 237000China

Since Shuji Nakamura first demonstrated the nitride laser in 1996[1],the domain of semiconductor laser technology has undergone a period of remarkable growth[2,3].Al In Ga N-based diode lasers(LDs)have proven their exceptional capabilities across a spectrum of pivotal applications,including high-density data storage,laser displays,laser lighting,and quantum technology[4].

关键词： laser diodes exceeding

基于消隐点共线约束的镜头畸变非量测校正方法

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光学学报 2022年第23期42卷 87-95页

作者：孙丽君郭强强陈天飞河南工业大学粮食信息处理与控制教育部重点实验室河南郑州450001 河南工业大学郑州市机器感知与智能系统重点实验室河南郑州450001 河南工业大学信息科学与工程学院河南郑州450001

提出一种基于消隐点共线约束的镜头畸变非量测校正方法。针对畸变中心的定位误差问题,利用畸变模型的基本矩阵和最小二乘法,实现畸变中心的高精度定位。同时,根据消隐点共线约束,定义消隐点和直线联合度量的畸变测度函数,并使用Nelder-M... 详细信息

提出一种基于消隐点共线约束的镜头畸变非量测校正方法。针对畸变中心的定位误差问题,利用畸变模型的基本矩阵和最小二乘法,实现畸变中心的高精度定位。同时,根据消隐点共线约束,定义消隐点和直线联合度量的畸变测度函数,并使用Nelder-Mead算法进行非线性优化,迭代计算出精确的畸变模型系数。实验结果表明,所提方法能够有效、准确地对镜头畸变进行校正,方法简单易行,校正精度高。

关键词：测量镜头畸变非量测校正消隐点共线约束直线残差

Transformation of coccolithophorid Emiliania huxleyi harboring a marine virus(Coccolithoviruses) serine palmitoyltransferase(SPT) gene by electroporation

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Transformation of coccolithophorid Emiliania huxleyi harbori...

融合语法规则的Bi-LSTM中文情感分类方法研究

中国生物化学与分子生物学会第十二届全国会员代表大会暨2018年全国学术会议

作者： Cai Weicong Wang Xueting guo qiangqiang Li Guiling Zeng Jun Liu Jingwen College of Food and Bioengineering JiMei University

Emiliania huxleyi is the most prominent modern coccolithophore,a group of photosynthetic marine unicellular eukaryotes that play a critical role in ocean *** are large double stranded DNA viruses,which is responsible for the demise of large oceanic blooms formed *** virus acquired a series of enzyme-coding genes predicted to be involved in the sphingolipid biosynthesis by gene transfers between ***,there is limited experimental validation indentifying the functions of these *** palmitoyltransferase(spt) catalyzes the first committed step in de novo sphingolipid biosynthetic *** transformation of eukaryotic cells is a powerful tool to get an insight into gene functions of the studied ***,a novel vector system for the transformation of *** was *** contained larger fragments of promoter and terminator sequences of *** endogenic fucoxanthin chlorophyll a/c-binding protein gene "fcp" and harbored *** virus(EhV99 B1) spt *** resultant recombinant transformation vectors pEhux-I-spt and pEhux-II were co-transferred into *** BOF92 by *** were obtained upon glufosinate-ammonium selection,and confirmed by genome PCR,qRT-PCR and Western blot screening of spt gene,which indicated that spt gene was integrated into the nuclear genome and was expressed at the mRNA and protein *** expression of the viral spt gene led to the accumulation of lipid droplets in the transformed cells stained with Nile Red.

关键词： Emiliania huxleyi Coccllithovirus genetic transformation serine palmitoyltransferase

来源： cnki会议评论

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数据分析与知识发现 2019年第11期3卷 99-107页

作者：卢强朱振方徐富永国强强山东交通学院信息科学与电气工程学院

【目的】提出一种融合语法规则的情感分类方法,提高中文文本情感分类的准确率。【方法】将中文语法规则以约束的形式同Bi-LSTM结合,通过规范句子相邻位置的输出模拟句子层次中非情感词、情感词、否定词和程度词的语言作用。【结果】相... 详细信息

【目的】提出一种融合语法规则的情感分类方法,提高中文文本情感分类的准确率。【方法】将中文语法规则以约束的形式同Bi-LSTM结合,通过规范句子相邻位置的输出模拟句子层次中非情感词、情感词、否定词和程度词的语言作用。【结果】相较于前沿的RNN、LSTM、Bi-LSTM模型,融合中文语法规则的Bi-LSTM模型准确率可达91.2%,在准确率方面得到较好的提升。【局限】实验数据集来源相对单一,只选取酒店评论数据集,在其他数据集上方法的有效性需要进一步验证。【结论】本文提出的情感分类方法融合了中文语法规则,进一步提升了情感分类的准确率。

关键词：语法规则情感分类 Bi-LSTM

表面活性剂对纳米氧化锌形貌和发光性能的影响

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材料导报 2016年第4期30卷 69-72页

作者：田会娟郭强强郝斌张建生唐山学院环境与化学工程系唐山063000 唐山市微纳米材料制备及应用重点实验室唐山063000 唐山师范学院化学系唐山063000

以二水合乙酸锌和氢氧化钠为原料,分别以表面活性剂十六烷基三甲基溴化铵(CTAB)和聚乙烯吡咯烷酮(PVP)为结构导向剂,采用简单的水热法制备了不同形貌的纳米氧化锌。研究了两种表面活性剂对纳米氧化锌形貌和光致发光性能的影响,并探讨了... 详细信息

以二水合乙酸锌和氢氧化钠为原料,分别以表面活性剂十六烷基三甲基溴化铵(CTAB)和聚乙烯吡咯烷酮(PVP)为结构导向剂,采用简单的水热法制备了不同形貌的纳米氧化锌。研究了两种表面活性剂对纳米氧化锌形貌和光致发光性能的影响,并探讨了表面活性剂的作用机理。采用X射线衍射(XRD)、扫描电子显微镜(SEM)和室温光致发光光谱(PL)等测试方法对样品的结构、形貌和发光性能进行了表征。结果表明:添加了表面活性剂后,样品形貌和尺寸都更加均匀,紫外发射峰强度相对增加。

关键词：纳米氧化锌水热法表面活性剂形貌光致发光性能

BiScO_(3)–Pb TiO_(3)–Bi(Zn_(2/3)Nb_(1/3))O_(3)高温钙钛矿陶瓷的微结构与性能

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硅酸盐学报 2024年第6期52卷 1962-1968页

作者：赵海燕杨会静郭强强张树宁唐山师范学院河北唐山063000

开发兼具高压电系数(d_(33))和高退极化温度(Td)的钙钛矿陶瓷是构建先进高温压电器件的关键。本工作将小容差因子、强铁电活性离子的Bi(Zn_(2)/3Nb_(1/3))O_(3)(BZN)基元引入至具有高温应用潜力的BiScO_(3)–PbTiO_(3)(BS–PT)高温钙钛... 详细信息

开发兼具高压电系数(d_(33))和高退极化温度(Td)的钙钛矿陶瓷是构建先进高温压电器件的关键。本工作将小容差因子、强铁电活性离子的Bi(Zn_(2)/3Nb_(1/3))O_(3)(BZN)基元引入至具有高温应用潜力的BiScO_(3)–PbTiO_(3)(BS–PT)高温钙钛矿压电体中,制备并研究了(0.995–x)BS–x PT–0.005BZN三元系高温压电陶瓷的微结构与压电性能。结果表明,所有陶瓷均具有三方相和四方相共存的特征且结构致密;x=0.62组成位于准同型相界,综合高温性能最佳:Td高达409℃并兼具优异的高温d_(33)(709 pC·N^(–1))。研究表明,BS–x PT–BZN有望用于制作在恶劣高温环境下服役的压电器件。

关键词：钪酸铋–钛酸铅压电陶瓷微结构高温压电性退极化温度

石墨烯-纳米银修饰电极的制备及用于芦丁的测定

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理化检验（化学分册） 2020年第9期56卷 945-950页

作者：翟江丽张源郭强强唐山师范学院唐山市绿色专用化学品重点实验室唐山063000

采用水热法制备石墨烯-纳米银(GR-AgNPs)复合材料,然后用扫描电镜、红外吸收光谱法、电化学阻抗谱法对其进行了表征。将复合材料滴涂在玻碳电极上,用循环伏安法、差分脉冲伏安法研究了芦丁在修饰电极上的电化学行为。结果表明:在pH 3.4... 详细信息

采用水热法制备石墨烯-纳米银(GR-AgNPs)复合材料,然后用扫描电镜、红外吸收光谱法、电化学阻抗谱法对其进行了表征。将复合材料滴涂在玻碳电极上,用循环伏安法、差分脉冲伏安法研究了芦丁在修饰电极上的电化学行为。结果表明:在pH 3.4的磷酸氢二钠-柠檬酸缓冲溶液中,该修饰电极对芦丁有明显的电催化作用,据此提出了用差分脉冲伏安法测定芦丁含量的方法。芦丁浓度在1.0×10^-7~2.5×10^-5mol·L^-1内与其氧化峰电流呈线性关系,方法检出限(3S/N)为1.0×10^-8mol·L^-1。方法用于市售芦丁药片和苦荞中芦丁含量的测定,加标回收率分别为98.9%~101%和99.4%~103%;测定值的相对标准偏差(n=5)为0.41%~3.6%。

关键词：石墨烯-纳米银复合材料修饰电极芦丁电化学行为

Application of artificial intelligence in clinical diagnosis and treatment:an overview of systematic reviews

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Intelligent Medicine 2022年第2期2卷 88-96页

作者： Shouyuan Wu Jianjian Wang qiangqiang guo Hui Lan Juanjuan Zhang Ling Wang Estill Janne Xufei Luo Qi Wang Yang Song Joseph LMathew Yangqin Xun Nan Yang Myeong Soo Lee Yaolong Chen School of Public Health Lanzhou UniversityLanzhouGansu 730000China Institute of Global Health University of GenevaGenevaSwitzerland Institute of Mathematical Statistics and Actuarial Science University of BernBernSwitzerland Department of Health Research Methods Evidence and ImpactFaculty of Health SciencesMcMaster UniversityHamiltonCanada McMaster Health Forum McMaster UniversityHamiltonCanada Iberoamerican Cochrane Centre-Biomedical Research Institute Sant Pau(IIB Sant Pau) BarcelonaSpain Advanced Pediatrics Centre PGIMER ChandigarhChandigarhIndia Evidence-Based Medicine Center School of Basic Medical SciencesLanzhouGansu 730000China Korea Institute of Oriental Medicine DaejeonKorea University of Science and Technology DaejeonKorea London Southbank University LondonUK Tianjin University of Traditional Chinese Medicine Tianjin 301617China Research Unit of Evidence-Based Evaluation and Guidelines Chinese Academy of Medical Sciences(2021RU0170)School of Basic Medical SciencesLanzhou UniversityLanzhouGansu 730000China Lanzhou University Institute of Health Data Science LanzhouGansu 730000China Key Laboratory of Evidence Based Medicine&Knowledge Translation of Gansu Province LanzhouGansu 730000China

Objective This study aimed to summarize the characteristics and methodological quality of systematic reviews on the application of artificial intelligence(AI)in clinical diagnosis and *** We systematically searched seven English-and Chinese-language literature databases to identify sys-tematic reviews on the application of AI,deep learning,or machine learning in the diagnosis and treatment of any disease published in *** evaluated the methodological quality of the included systematic reviews using“A Measurement tool for the assessment of multiple systematic reviews”(AMSTAR).We also conducted meta-analyses on the diagnostic accuracy of AI on selected disease categories with a large number of included studies and low clinical *** A total of 40 systematic reviews reporting 1,083 original studies were included,covering 31 diseases from 11 groups of *** systematic reviews were related to neoplasms and nine were systematic reviews related to diseases of the digestive *** selected digestive system diseases for the *** pooled sensitivities(with 95%confidence interval(CI))of AI to assist the diagnosis of helicobacter pylori,gastrointestinal ulcers,hemorrhage,esophageal tumors,gastric tumors,and intestinal tumors(with 95%CI)were 0.91(0.83-0.95),0.99(0.76-1.00),0.95(0.83-0.99),0.90(0.85-0.93),0.90(0.82-0.95),and 0.93(0.88-0.96),respectively,and the pooled specificities were 0.82(0.77-0.87),0.97(0.86-1.00),1.00(0.99-1.00),0.80(0.71-0.87),0.93(0.87-0.97),and 0.89(0.85-0.92),*** AMSTAR items“the list of included studies”(n=39,97.5%)and“the characteristics of the included studies”(n=39,97.5%)had the highest compliance among the reviews;the compliance was relatively low to the items“the consideration of publication status”(n=1,2.5%),“the consideration of scientific quality”(n=19,47.5%),“data synthesis methods”(n=18,45.0%),and“the evaluation of publication bias”(n=13,32.5%).Conclusions The main subjects

关键词： Artificial intelligence Overview of systematic reviews Diagnosis Treatment

La0.8Sr0.2CoO3基阻抗谱型厚膜NO2传感器的研究

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稀有金属材料与工程 2009年第S2期38卷 935-938页

作者：戴磊吴印林郭强强王岭刘志丹河北理工大学

以La2O3、SrCO3和Co3O4为原料,采用高温固相反应法制备了La0.8Sr0.2CoO3(LSC)粉体。采用丝网印刷涂膜法在Y2O3稳定的ZrO2(YSZ)固体电解质表面制备LSC膜层,经1400℃煅烧,制成厚膜型NO2传感器。采用扫描电子显微镜(SEM)观察其断面形貌。... 详细信息

以La2O3、SrCO3和Co3O4为原料,采用高温固相反应法制备了La0.8Sr0.2CoO3(LSC)粉体。采用丝网印刷涂膜法在Y2O3稳定的ZrO2(YSZ)固体电解质表面制备LSC膜层,经1400℃煅烧,制成厚膜型NO2传感器。采用扫描电子显微镜(SEM)观察其断面形貌。采用交流阻抗技术对NO2敏感性能进行测试。研究了氧气浓度和LSC厚度对传感器阻抗值的影响。结果表明:LSC膜层均匀致密,且与YSZ结合良好。传感器的阻抗值随NO2浓度的增加而迅速减小,敏感性能良好。氧气体积分数越大,LSC膜层厚度越小,传感器低频区阻抗值越大。

关键词： La0.8Sr0.2CoO3 传感器 NO2 敏感性