检索结果-南通市图书馆

Light(Science & Applications) 2024年第5期13卷 941-956页

作者： Shunda Qiao Ying He haiyue sun Pietro Patimisco Angelo Sampaolo Vincenzo Spagnolo Yufei Ma National Key Laboratory of Laser Spatial Information Harbin Institute of TechnologyHarbinChina PolySense Lab Dipartimento Interateneo di FisicaUniversity and Politecnico of BariVia AmendolaBariItaly

Photoacoustic spectroscopy(PAS)as a highly sensitive and selective trace gas detection technique has extremely broad application in many ***,the laser sources currently used in PAS limit the sensing *** to diode laser and quantum cascade laser,the solid-state laser has the merits of high optical power,excellent beam quality,and wide tuning *** we present a long-wave,high-power,wide-tunable,singlelongitudinal-mode solid-state laser used as light source in a PAS sensor for trace gas *** self-built solid-state laser had an emission wavelength of~2μm with Tm:YAP crystal as the gain material,with an excellent wavelength and optical power stability as well as a high beam *** wide wavelength tuning range of 9.44 nm covers the absorption spectra of water and ammonia,with a maximum optical power of~130 mW,allowing dual gas detection with a single laser *** solid-state laser was used as light source in three different photoacoustic detection techniques:standard PAS with microphone,and external-and intra-cavity quartz-enhanced photoacoustic spectroscopy(QEPAS),proving that solid-state laser is an attractive excitation source in photoacoustic spectroscopy.

关键词： power tunable tuning

A highly sensitive LITES sensor based on a multi-pass cell with dense spot pattern and a novel quartz tuning fork with low frequency

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

Opto-Electronic Advances 2024年第3期7卷 26-34页

作者： Yahui Liu Shunda Qiao Chao Fang Ying He haiyue sun Jian Liu Yufei Ma National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of TechnologyHarbin 150000China Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450000China Advanced Microscopy and Instrumentation Research Center School of Instrumentation Science and EngineeringHarbin Institute of TechnologyHarbin 150080China.

A highly sensitive light-induced thermoelectric spectroscopy(LITES)sensor based on a multi-pass cell(MPC)with dense spot pattern and a novel quartz tuning fork(QTF)with low resonance frequency is reported in this *** erbi-um-doped fiber amplifier(EDFA)was employed to amplify the output optical power so that the signal level was further *** optical path length(OPL)and the ratio of optical path length to volume(RLV)of the MPC is 37.7 m and 13.8 cm^(-2),respectively.A commercial QTF and a self-designed trapezoidal-tip QTF with low frequency of 9461.83 Hz were used as the detectors of the sensor,*** target gas selected to test the performance of the system was acetylene(C2H2).When the optical power was constant at 1000 mW,the minimum detection limit(MDL)of the C2H2-LITES sensor can be achieved 48.3 ppb when using the commercial QTF and 24.6 ppb when using the trapezoid-al-tip *** improvement of the detection performance by a factor of 1.96 was achieved after replacing the commer-cial QTF with the trapezoidal-tip QTF.

关键词： light-induced thermoelectric spectroscopy quartz tuning fork multi-pass cell gas sensing

不同修剪方式对平茬处理后越橘树体更新复壮的影响

在线全文

学校读者我要写书评

暂无评论

东北农业大学学报 2024年第6期55卷 14-24页

作者：王彤闫黎明杨雷孙海悦陈丽李亚东吉林农业大学园艺学院吉林省小浆果遗传育种与创新利用工程中心长春130118 紫约农业科技有限公司安徽芜湖241000

探究平茬处理后不同修剪方式对衰老越橘树体更新复壮的影响,以12年生北高丛越橘“瑞卡”为试验材料,对其采用不同修剪时间、不同修剪措施处理,探究对其生长指标、花芽形成数量及光合特性的影响。根据主成分分析法对各处理综合评价后发现... 详细信息

探究平茬处理后不同修剪方式对衰老越橘树体更新复壮的影响,以12年生北高丛越橘“瑞卡”为试验材料,对其采用不同修剪时间、不同修剪措施处理,探究对其生长指标、花芽形成数量及光合特性的影响。根据主成分分析法对各处理综合评价后发现,修剪方式相同时,2023年6月15日处理植株在生长及光合特性等方面的综合表现均优于7月15日处理植株;在短截处理中,各处理均未形成花芽,其余指标综合评价为轻度短截>中度短截>重度短截;在疏枝处理中,各处理综合评价表现为重度疏枝>中度疏枝>轻度疏枝;在疏枝+短截处理中,选留10~15个主枝的情况下,轻度短截综合评价得分最高,中度短截次之,重度短截最低。其中6月15日选留10~15个基生枝且剪留2/3的综合得分最高,是该试验中最适用于生产实践的处理方法。

关键词：越橘修剪生长指标光合特性主成分分析

在线全文

学校读者我要写书评

暂无评论

越橘离体腋芽小滴玻璃化超低温保存

吉林农业大学学报 2024年第4期46卷 589-599页

作者：李娴张志东刘海广陈丽李亚东孙海悦吉林农业大学园艺学院长春130118 吉林省小浆果遗传育种与创新利用工程中心长春130118

以越橘试管苗“密斯梯”的腋芽为材料,筛选了小滴玻璃化超低温保存过程中的各项技术参数;用8种66份越橘基因型验证该方法的广谱性;用10个ISSR引物检测超低温保存后5个品种再生株系遗传稳定性。结果表明:从30 d苗龄试管苗切取长1~1.5 mm... 详细信息

以越橘试管苗“密斯梯”的腋芽为材料,筛选了小滴玻璃化超低温保存过程中的各项技术参数;用8种66份越橘基因型验证该方法的广谱性;用10个ISSR引物检测超低温保存后5个品种再生株系遗传稳定性。结果表明:从30 d苗龄试管苗切取长1~1.5 mm单腋芽茎段分别在继代培养基(WPM+0.3 mg/L ZT+7 g/L琼脂+30 g/L蔗糖,SCM)和预培养基(WPM+7 g/L琼脂+0.3 mol/L蔗糖,PCM)上各培养1 d[(25±2)℃黑暗];腋芽用加载液(WPM+2.0 mol/L甘油+1.0 mol/L蔗糖,LS)处理30 min(室温),然后浸入植物玻璃化保护溶液Ⅱ(WPM+300 g/L甘油+150 g/L乙二醇+150 g/L二甲基亚砜+0.4 mol/L蔗糖,PVS2)中40 min(0℃);在铝箔纸上制成小滴(1腋芽/小滴)之后投入液氮中保存;取出的材料立即用卸载液(WPM+1.2 mol/L蔗糖,ULS)处理20 min(室温);在SCM上腋芽黑暗培养1 d后转至正常条件下再生培养。广谱性验证结果为平均成活率81.3%和再生率47%。5个越橘品种的分子标记检测结果显示未出现特异性条带。

关键词：越橘腋芽小滴玻璃化超低温保存遗传稳定性

基于中空复合纳米粒子的超声溶栓体系构建及效果验证

在线全文

学校读者我要写书评

暂无评论

成都医学院学报 2024年第3期19卷 395-400页

作者：孙海悦韦佼君陈家乐赵龙成都医学院基础医学院成都610500 成都医学院生物科学与技术学院成都610500

目的评价超声辅助微泡溶栓联合声动力疗法的中空复合纳米粒子的生物安全性及体外溶栓效果,评估其治疗静脉血栓栓塞症的潜在应用价值。方法制备氮掺杂石墨烯量子点(NGQD)和一氧化氮供体N,N’-二仲丁基-N,N’-二亚硝基-1,4-苯二胺(BNN6)... 详细信息

目的评价超声辅助微泡溶栓联合声动力疗法的中空复合纳米粒子的生物安全性及体外溶栓效果,评估其治疗静脉血栓栓塞症的潜在应用价值。方法制备氮掺杂石墨烯量子点(NGQD)和一氧化氮供体N,N’-二仲丁基-N,N’-二亚硝基-1,4-苯二胺(BNN6),BNN6负载于NGQD上,将二者复合体载入利用盐模板法制备的中空介孔二氧化硅(HMSN)中,形成纳米溶栓体系BNM;通过电镜和纳米粒度仪观察BNM的形貌、尺寸等特征;通过细胞毒性实验、活-死细胞染色及溶血实验评价纳米溶栓体系BNM的生物安全性;通过体外溶栓和纤维蛋白凝块降解评价纳米材料的体外溶栓效果。结果与对照组相比,不同浓度的BNM对HUVECs和RAW264.7细胞的活性无影响,中低浓度BNM的溶血率未超过纳米材料溶血安全限,3个浓度的BNM对红细胞和血小板的形貌未产生明显影响,不引起血小板活化;与对照组相比,超声辅助BNM组的溶栓率随BNM浓度增加而提高,纤维蛋白网络出现空洞,荧光面积比降低。结论本研究制备的纳米溶栓系统具有很好的生物相容性和血液安全性,可以响应超声进行溶栓,表现出优良的溶栓性能,为临床应用提供了新策略。

关键词：超声溶栓声动力疗法石墨烯量子点一氧化氮供体中空介孔二氧化硅纳米颗粒

在线全文

学校读者我要写书评

暂无评论

红豆越橘组培苗茎尖小滴玻璃化超低温保存

吉林农业大学学报 2024年第3期46卷 439-445页

作者：杨晶文毛宇金李娴张志东孙海悦李亚东刘海广吉林农业大学园艺学院长春130118 吉林省小浆果遗传育种与创新利用工程中心长春130118

研究了红豆越橘组培苗茎尖的小滴玻璃化超低温保存方法。剪取苗龄30 d的组培苗带顶芽茎段,在WPM(Woody plant medium)+0.5 mg/L ZT(Zeatin玉米素)+30 g/L蔗糖+7 g/L琼脂培养基(SSM)上,于4℃黑暗条件下炼苗25 d;将剥取的长约2.0 mm茎尖... 详细信息

研究了红豆越橘组培苗茎尖的小滴玻璃化超低温保存方法。剪取苗龄30 d的组培苗带顶芽茎段,在WPM(Woody plant medium)+0.5 mg/L ZT(Zeatin玉米素)+30 g/L蔗糖+7 g/L琼脂培养基(SSM)上,于4℃黑暗条件下炼苗25 d;将剥取的长约2.0 mm茎尖在黑暗和(25±2)℃条件下用预培养基(WPM+0.3 mol/L蔗糖+7 g/L琼脂)培养24 h;室温下茎尖在加载液(WPM+2.0 mol/L甘油+1.0 mol/L蔗糖)中处理30 min;0℃下用植物玻璃化溶液Ⅱ(PVS2)处理茎尖40 min;0℃下在铝箔条上将茎尖与PVS2制成小滴(2.5μL),并迅速投入液氮(-196℃)中保存1 h;从液氮中取出带茎尖的铝箔条迅速转入卸载液(WPM+1.2 mol/L蔗糖)中,室温下解冻和卸载20 min;将卸载的茎尖在SSM培养基上黑暗培养(25±2)℃1 d;之后在正常光照条件下再生培养。结果表明:再生培养30 d后,试验的4份种质资源的平均再生率为76%,这为红豆越橘种质资源保存提供了一种新的途径。

关键词：红豆越橘超低温保存小滴玻璃化组培苗茎尖

Machine learning noise exposure detection of rail transit drivers using heart rate variability

在线全文

学校读者我要写书评

暂无评论

Transportation Safety and Environment 2024年第2期6卷 122-132页

作者： Zhiqiang sun haiyue Liu Yubo Jiao Chenyang Zhang Fang Xu Chaozhe Jiang Xiaozhuo Yu Gang Wu School of Transportation and Logistics Southwest Jiaotong UniversityChengdu 611756China Lanzhou Rail Transit Co. Ltd.Lanzhou 730000China Sichuan Tourism University Chengdu 610100China PagerDuty Inc.905 King StWTorontoON M6K 3G9Canada

Previous studies have found that drivers’physiological conditions can deteriorate under noise conditions,which poses a potential hazard when *** a result,it is crucial to identify the status of drivers when exposed to different ***,such explo-rations are rarely discussed with short-term physiological indicators,especially for rail transit *** this study,an experiment involving 42 railway transit drivers was conducted with a driving simulator to assess the impact of noise on drivers’physiological *** the individuals’heterogeneity,this study introduced drivers’noise annoyance to measure their *** variances of drivers’heart rate variability(HRV)along with different noise adaptions are explored when exposed to different noise *** machine learning approaches(support vector machine,K-nearest neighbour and random forest)were then used to classify their physiological status under different noise conditions according to the HRV and drivers’self-noise *** indicate that the volume of traffic noise negatively affects drivers’performance in their *** with different noise adaptions but exposed to a fixed noise were found with discrepant HRV,demonstrating that noise adaption is highly associated with drivers’physiological status under *** is also found that noise adaption inclusion could raise the accuracy of ***,the random forests classifier performed the best in identifying the physiological status when exposed to noise conditions for drivers with different noise adaptions.

关键词： noise exposure detection noise adaption heart rate variability(HRV) machining learning simulator experiment

Improved viability of trehalose on Lactobacillus plantarum embedded with whey protein concentrate/pullulan in simulated gastrointestinal conditions and its application in acid juice

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2023年

作者： Xiujuan Wang haiyue sun Jian Wu Yu Wang Zhiyi Ai Xinzhu Wang Bo Nan Yong Cao Xia Li Jingsheng Liu Yuhua Wang Changchun Customs Health Center Jilin Province Innovation Center for Food Biological Manufacture， Jilin Agricultural University National Engineering Research Center for Wheat and Cord Deep Processing Changchun， China National Processing Laboratory for Soybean Industry and Technology Changchun， China College of Food Science and Engineering， Jilin Agricultural University

Trehalose (TRE) was used to improve the gastrointestinal tolerance of Lactobacillus plantarum (L. plantarum) embedded with whey protein concentrate/pullulan (WPC/PUL) hydrogel and the embedded L. plantarum was applied to juice. The study indicated that 5% TRE significantly increased the viable counts of L. plantarum embedded in WPC/PUL hydrogel from (8.83 ± 0.03) to (9.14 ± 0.04) (Log CFU/g) in simulated gastric juice (SGJ) and from (9.13 ± 0.04) to (9.38 ± 0.04) (Log CFU/g) in simulated intestinal juice (SIJ)， respectively. The addition of TRE improved the glass transition temperature of WPC/PUL hydrogel and decreased the hardness and its solubility in SGJ， which may be responsible for the improved protection of WPC/PUL hydrogels on L. plantarum. In addition， TRE increased the viable counts of L. plantarum in WPC/PUL probiotic microcapsule juice at low pH and high temperature during storage.

关键词：

Development of EST-derived SSR markers in Actinidia arguta and genetic diversity analysis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Development of EST-derived SSR markers in Actinidia arguta a...

2013全国植物生物学大会

作者： WANG Jiahui sun haiyue GUO Ruixue WANG Fawei WANG Ming LI Yadong College of Horticulture Jilin Agricultural University

The objective of this study was to analyze the SSR distribution in Actinidia and develop new EST-derived SSR markers.A total of 132 593 ESTs of Actinidia were downloaded from the NCBI database and pro

关键词： Actinidia arguta EST-SSR genetic diversity analysis

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

脉冲自发辐射放大光源的产生与放大特性研究

中国激光 2018年第6期45卷 27-33页

作者：孙海跃陈胜平齐雪钟明飞中国卫星海上测控部江苏江阴214431 国防科技大学光电科学与工程学院湖南长沙410073

自发辐射放大(ASE)光源作为一种非相干光源,在生物医学等领域发挥着重要作用。利用脉冲ASE光源作为抽运源激发非线性介质产生的超连续谱,具有低时间相干性和宽光谱特性,使其具备更加广阔的应用前景。研究了脉冲ASE光源的产生和放大过程... 详细信息

自发辐射放大(ASE)光源作为一种非相干光源,在生物医学等领域发挥着重要作用。利用脉冲ASE光源作为抽运源激发非线性介质产生的超连续谱,具有低时间相干性和宽光谱特性,使其具备更加广阔的应用前景。研究了脉冲ASE光源的产生和放大过程,获得瓦级纳秒脉冲ASE光源;采用光纤环形反射镜结构提高带内功率,得到280mW连续窄谱带ASE输出;利用声光调制器和电光调制器共同调制连续窄谱带ASE,得到脉宽为8ns、重复频率为50kHz、平均功率为50μW的脉冲ASE;并且详细研究了具有不同脉冲波形的ASE的放大过程。

关键词：激光光学自发辐射放大纳秒脉冲光纤环形反射镜