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柔性硫系玻璃红外光纤传像束的制备与性能测试

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光学精密工程 2017年第12期25卷 3137-3144页

作者：王形锋杨建峰闫兴涛陈国庆许彦涛中国科学院西安光学精密机械研究所陕西西安710119 中国科学院大学材料科学与光电技术学院北京101408

讨论了红外光纤传像束的学术意义和制备工艺,制备了一种硫系玻璃红外光纤传像束并进行了专门的性能测试。选用As40S58Se2、As40S60作为芯棒和皮管玻璃组分,采用管棒法拉制成纤,利用人机结合的排丝工艺制备出了单丝直径为50μm,纤芯直径... 详细信息

讨论了红外光纤传像束的学术意义和制备工艺,制备了一种硫系玻璃红外光纤传像束并进行了专门的性能测试。选用As40S58Se2、As40S60作为芯棒和皮管玻璃组分,采用管棒法拉制成纤,利用人机结合的排丝工艺制备出了单丝直径为50μm,纤芯直径为40μm,576元正方形排列的红外光纤传像束。搭建了相应的实验测试平台,对光纤束排列规则度、断丝率、光学效率及传像束引起系统调制传递函数(MTF)下降量等指标进行了测试。测试表明,传像束断丝率为2.7%,衰减损耗低于0.5dB/m,光学效率约为31%,在红外光纤传像系统中光纤传像束引起的MTF下降量小于10%。最后,利用研制的红外传像束完成了红外成像实验,结果表明,红外光纤传像束能够实现良好的红外成像。

关键词：红外光纤传像束红外成像技术光学效率硫系玻璃光纤调制传递函数

超声换能器表面振动和声场测量及其与经典超声换能器的仿真比较

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声学技术 2018年第5期37卷 501-506页

作者：孙彦招张涛天津大学电气自动化与信息工程学院天津300072

超声换能器广泛应用于声学测量,其工作性能主要取决于它的振动与声特征。然而,多数研究中的换能器被认为是经典的活塞或高斯型,经典与常用的真实换能器之间的差异容易被忽视。基于此,首先用激光测振和传声器测声方法测量了某厂家换能器... 详细信息

超声换能器广泛应用于声学测量,其工作性能主要取决于它的振动与声特征。然而,多数研究中的换能器被认为是经典的活塞或高斯型,经典与常用的真实换能器之间的差异容易被忽视。基于此,首先用激光测振和传声器测声方法测量了某厂家换能器产品的表面振动与声场特征。然后设计有限元方案,分别仿真经典与真实换能器的声场。最后从辐射面振速分布、声场声压和相关系数等方面,综合比较经典与真实超声换能器之间振动与声场的异同。结果表明,换能器间的辐射面振速分布差别明显,所研究的真实换能器的声场特征接近于活塞,而与高斯型差别较大。

关键词：超声换能器振动测量声测量有限元方法声场

Electric-induced Degradation of Cathode Interface Layer in PM7: IT-4F Polymer Solar Cells

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Electric-induced Degradation of Cathode Interface Layer in P...

Experimental study of mode distortion induced by stimulated Raman scattering in high-power fiber amplifiers

第八届新型太阳能材料科学与技术学术研讨会

作者： Tingting Dai Xiong Li Xuejiao Zhou Yujiao yan tao Lin Department of Physics Beijing Technology and Business University

Cathode buffer layer interface modification is a commonly used strategy to prepare high-efficient organic solar cells(OSCs). Non-fullerene OSCs based on PM7: IT-4 F were prepared and modified with PFN-Br cathode buffer layer. The introduction of PFN-Br buffer layer boosts the photovoltaic performance of PM7: IT-4 F based OSCs obviously, however the stability of the PFN-Br modified device shows a serious degradation. By excluding the influence of heat, oxygen, moisture and light illumination, the degradation was verified to be triggered by the electric effect. As soon as the devices undergo electrical measurement such as applying bias voltage for current density-voltage test, the degradation begins. The degradation mechanism of the PFN-Br modified OSCs was investigated in detail with intensity modulated photovoltage spectroscopy/photocurrent spectroscopy(IMPS/IMVS), photo-induced charge extraction linear increasing voltage(Photo-CELIV), impendence spectroscopy(IS) technology. The results show that the PFN-Br cathode buffer layer is deteriorated and increase the interface resistance between active layer and cathode, which hinder charge transport and collection at the electrode, thus weaken the performance of PM7: IT-4 F based OSCs. The degradation of PM7:IT-4 F/PFN-Br OSCs induced by electric effect proposed in this study provides a new inspiration for the degradation study of OSCs.

关键词： organic solar cells cathode buffer layer degradation carrier recombination

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Photonics Research 2020年第4期8卷 595-600页

作者： QIUHUI CHU QIANG SHU ZENG CHEN FENGYUN LI DONGLIN yan CHAO GUO HONGHUAN LIN JIANJUN WANG FENG JING CHUANXIANG TANG RUMAO tao Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Particle&Radiation Imaging(Tsinghua University) Ministry of EducationDepartment of Engineering PhysicsTsinghua UniversityBeijing 100084China National Key Laboratory of Science and Technology on Blind Signal Processing Chengdu 610000China

The experimental investigation of mode distortion induced by stimulated Raman scattering(SRS)in a high-power fiber amplifier,which includes the evolutions of optical spectra,spatial beam profiles,and time-frequency characteristics,has been carried out in ***-frequency characteristics have been studied for the first time,to the best of our knowledge,by using a low-speed camera and high-speed photodiode traces,which revealed that temporal-frequency characteristics of SRS-induced mode distortion are different from traditional dynamic mode instability(MI).The experimental results show that the output beam profile remains stable before the mode distortion occurs and fluctuates obviously after the onset of SRS-induced MI but on a time scale of seconds,which is much lower than that of Yb-gain-induced MI featuring millisecond-level beam profile *** also shows that the mode distortion became measurable in company with the onset of inter-mode four-wave mixing(IM-FWM)when the ratio of Raman light reaches 3%;further,the beam quality factor M2degrades gradually from 1.4 to 2.1 as the ratio of Raman light *** mode distortion is accompanied by an obvious temperature increase of the output passive fiber,which further confirms that the mode distortion originates from *** cause of the mode distortion induced by SRS has been explained in the context of core-pumped SRS effect,and the investigation on the accompanying IM-FWM effect indicates that the main content of the SRSinduced high-order mode is the LP21 mode.

关键词： Experimental mode distortion stimulated Raman scattering in high-power fiber amplifiers Raman

银耳状Fe-N-C复合催化剂的制备及催化氧还原性能研究

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分析化学 2017年第9期45卷 1297-1302页

作者：黄燕平苑红艳张健杨亚辉刘洪涛中南大学化学化工学院锰资源高效清洁利用湖南省重点实验室湖南农业大学资源环境学院

以无机铁盐和邻苯二胺为基础原料,经铁（Ⅲ）基螯合前驱体热解反应,制备出Fe-N-C复合催化剂。经扫描电镜观察,带有折褶的碳微纳米片相互交迭,形成银耳状的三维自支撑结构。氮气吸脱附测试表明此结构富含微孔和介孔,比表面积可达290 m;/... 详细信息

以无机铁盐和邻苯二胺为基础原料,经铁（Ⅲ）基螯合前驱体热解反应,制备出Fe-N-C复合催化剂。经扫描电镜观察,带有折褶的碳微纳米片相互交迭,形成银耳状的三维自支撑结构。氮气吸脱附测试表明此结构富含微孔和介孔,比表面积可达290 m;/g。通过X射线衍射（XRD）确证石墨化C和多晶Fe;C作为催化剂主相存在,X射线光电子能谱（XPS）进一步揭示N原子主要以石墨N和吡啶N形式掺杂到C骨架中。电化学测试表明银耳状Fe-N-C复合催化剂在碱性条件下催化氧还原反应为四电子过程,其催化活性可媲美商业Pt/C催化剂。经过2000次氧还原测试后,催化极限电流衰减小于5%,并且半波电势仅负移5 mV（商业Pt/C催化剂负移35 mV）,表现出优异的氧还原催化稳定性。

关键词：氧还原反应 Fe-N-C复合催化剂多孔结构催化活性催化稳定性

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泛昔洛韦缓释微丸的家犬药动学研究

药学服务与研究 2006年第3期6卷 197-199页

作者：郭涛李岩颜鸣光明沈阳军区总医院药剂科沈阳110016

目的:研究泛昔洛韦(famciclovir,FCV)缓释微丸在家犬体内的药动学及相对生物利用度。方法:6条家犬随机交叉灌服FCV缓释微丸和FCV普通片375 mg后,应用HPLC法测定血药浓度并对其进行药动学和相对生物利用度研究。结果:FCV缓释微丸和普通... 详细信息

目的:研究泛昔洛韦(famciclovir,FCV)缓释微丸在家犬体内的药动学及相对生物利用度。方法:6条家犬随机交叉灌服FCV缓释微丸和FCV普通片375 mg后,应用HPLC法测定血药浓度并对其进行药动学和相对生物利用度研究。结果:FCV缓释微丸和普通片的达峰时间(tmax)分别为(4.80±0.84)h和(1.80±0.27)h,峰浓度(cmax)分别为(2.62±1.14)μg/mL和(4.50±0.63)μg/mL,AUC0→∞分别为(25.59±7.58)mg.h.L-1和(26.77±5.53)mg.h.L-1,平均驻留时间(MRT)分别为(9.85±2.47)h和(4.96±0.78)h,相对生物利用度为(95.09±16.64)%。结论:FCV缓释微丸具有明显的缓释特征。

关键词：泛昔洛韦迟效制剂药代动力学生物利用度色谱法,高压液相

Conservation and Utilization of Germplasm Resources of Shandong Local Chickens

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Animal Husbandry and Feed Science 2009年第8期1卷 6-9页

作者： ZHOU yan CAO Ding-guo HAN Hai-xia LEI Qiu-xia LI Fu-wei LI Gui-ming LU yan LIU tao Poultry Research Institute Shandong Academy of Agricultural Sciences and Poultry Breeding Engineering Technology Center of ShandongProvince Jinan 250023 China

In this article, we reviewed the achievements of our team in genetic resource conservation and innovative use of Shandong local chicken breeds from the conservation, assessment on germplasm characteristics and breeding of Shandong local chickens, so as to provide a reference for further research and development of local chicken breeds.

关键词： Local chickens Breeds preservation Germplasm assessment Breeding

卵圆孔未闭患者介入封堵术中导丝通过卵圆孔困难的影响因素分析

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中华实用诊断与治疗杂志 2024年第2期38卷 141-145页

作者：钱晨旭王平毛治尉闫振富张涛豆倩云余欣朱铮铮韩凌王东伟郑州大学附属郑州中心医院心血管内科河南郑州450007 郑州大学附属郑州中心医院超声科河南郑州450007

目的观察卵圆孔未闭(PFO)患者术前对比增强经颅多普勒超声声学造影(c-TCD)右向左分流(RLS)分级及经食管超声心动图(TEE)测量的PFO宽度,探讨PFO患者介入封堵术中导丝通过卵圆孔困难的影响因素。方法2021年1月—2022年12月郑州大学附属郑... 详细信息

目的观察卵圆孔未闭(PFO)患者术前对比增强经颅多普勒超声声学造影(c-TCD)右向左分流(RLS)分级及经食管超声心动图(TEE)测量的PFO宽度,探讨PFO患者介入封堵术中导丝通过卵圆孔困难的影响因素。方法2021年1月—2022年12月郑州大学附属郑州中心医院行经皮介入封堵术的PFO患者286例,术前均行c-TCD、经胸超声心动图声学造影(c-TTE)评定RLS分级,行TEE检查测量PFO宽度、长度。286例PFO患者中,术中导丝顺利通过卵圆孔者260例为通过顺利组,应用Swartz鞘协助导丝通过者26例为通过困难组。比较2组术前c-TCD RLS、c-TTE RLS、PFO宽度、PFO长度、PFO分型及手术时间;采用多因素logistic回归分析PFO患者介入封堵术中导丝通过卵圆孔困难的影响因素。结果通过顺利组手术时间[(34.20±12.80)min]短于通过困难组[(61.07±30.33)min](t=8.597,P0.05)。c-TCD RLS 0级(OR=944.684,95%CI:75.962~11748.277,P<0.001)、c-TCD RLSⅡ级(OR=72.026,95%CI:10.102~513.544,P<0.001)、PFO宽度≤1.14 mm(OR=0.265,95%CI:0.078~0.900,P=0.033)是卵圆孔患者介入封堵术中导丝通过卵圆孔困难的危险因素。结论c-TCD RLS≤Ⅱ级、PFO宽度≤1.14 mm的PFO患者介入封堵术中导丝通过卵圆孔困难的风险增大,需Swartz鞘协助。

关键词：卵圆孔未闭介入封堵术对比增强经颅多普勒超声声学造影经食管超声心动图右向左分流卵圆孔未闭宽度

Highly efficient lithium utilization in lithium metal full-cell by simulated missile guidance and confinement systems

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Science China Materials 2021年第4期64卷 830-839页

作者： Jinqiu Zhou Haoliang Lu Xi Zhou Haoqing Ji Yawen Sun tao Qian Chenglin yan Soochow Institute for Energy and Materials Innovations College of EnergyKey Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China Institute of Chemical Industry of Forestry Products Chinese Academy of ForestryNanjing 210042China

The efficient utilization of metallic lithium(Li)is the key to enable application of Li metal full-cell with low amount of excess Li,contributing to higher safety and energy ***,we report an extraordinary Li metal full-cell with only 20%excess Li,which demonstrated significantly improved reversibility and high Coulombic *** simulated missile guidance and confinement system(SMGCS)was designed to guide and confine Li deposition through constructing compatible silver lithiophilic sites and nitrate *** sites act as effective Li nuclei to attract Li ions and direct the initial *** generated nitrate layer affords an interfacial environment favorable for confined and uniform deep Li deposition,which is theoretically verified by molecular dynamics(MD)*** two combined merits offer a robust and dendrite-free Li deposition,enabling the application of Li metal full-cell with slight excess *** also result in an outperformed Li cycling efficiency of ca.99%for over 300 cycles along with deep cycling at a high capacity of 10 mA h cm^(-2)in carbonate *** unprecedented high degree of Li utilization opens a new avenue for the future development of highly efficient Li metal full-cells.

关键词： lithium utilization lithium metal full-cell Li nucleation Li deposition