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Chinese Journal of Chemistry 2017年第10期35卷 1522-1528页

作者： Hang Zhao Wuliji Hasi Lin Bao Siqingaowa Han Xuanyu Sha Jia Sun Xiutao Lou Dianyang Lin zhiwei lv National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of Technology Harbin Heilongjiang 150080 China Affiliated HospitaI of Inner Mongolia University for the Nationalities Tongliao Inner Mongolia 028007 China

In this study, surface-enhanced Raman Spectroscopy （SERS） technology was used to rapidly detect illegally added sildenafil drugs. A detailed attribution analysis by density functional theory （DFT） was used to guide specific experiments. The Raman signals were obtained from a silver colloid （Ag col） substrate, and they increased in the presence of the mineral salt, potassium iodide （KI）. These methods detected sildenafil in aqueous solutions as low as 1 μg/mL with high signal uniformity （RSD=3.77%）. Prior to this study, traditional Raman techniques detected substances in solid samples only. Here, Raman technology detected low contents of sildenaful drugs in liquid nutraceuticals. Therefore, SERS technology has great potential for on-site and real-time detection of illegal drugs in water and in liquid nutraceuticals.

关键词： sildenafil surface-enhanced Raman spectroscopy density functional theory limit of detection

A Study on the Capital System Reform Tendency of Chinese company

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International English Education Research 2016年第5期 62-64页

作者： ZHAO Shuwen lv zhiwei Hebei Baoding Institute of political science and law Hebe uiuniversity 071000

This paper will analyze the history and evolvements of capital system in order to grasp the tendency of capital system reform. Managers should give more attention to the establishing of reform institution and the supervising of company capital system＇ s operation in the process of reform. Managers should also attach great importance to the third party and creditors when they value the interests of shareholders. It is imperfect to only emphasis or value the interests of the shareholders or the third party and creditors. In addition, creditor＇ s self-protection of civil action should obtain much more approaches in the process of reform.

关键词： company capital system reform creditor' s interests

Output characteristics of high-power stimulated Brillouin scattering pulse compression enhanced by thermal effects based on HT270

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High Power Laser Science and Engineering 2022年第4期10卷 14-25页

作者： Hongli Wang Seongwoo Cha Hong Jin Kong Yulei Wang zhiwei lv School of Information and Communication Engineering North University of ChinaTaiyuan 030051China Department of Physics Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea School of Electronics and Information Engineering Hebei University of TechnologyTianjin 30040lChina

Thermal effects are typically considered as obstacles to high-repetition-rate stimulated Brillouin scattering(SBS)pulse *** this paper,a novel method is proposed for improving the SBS output characteristics by exploiting thermal effects on the liquid *** HT270,the SBS output parameters with the medium purification and rotating off-centered lens methods are studied at different repetition *** results indicate that these two methods can alleviate thermal effects and improve the energy efficiency,but the rotating method reduces the energy stability because of the aggravated optical breakdown at the kilohertz-level repetition *** a 35-mJ pump energy,the energy efficiency at 2 kHz without the rotating method is 30%higher than that at 100 Hz and 70%higher than that at 500 *** enhancement of the SBS output characteristics by thermal effects is demonstrated theoretically and experimentally,and 2-kHz high-power SBS pulsecompression is achieved with HT270.

关键词： high-repetition-rate laser stimulated Brillouin scattering pulse compression thermal effects

Enhancement of Innovation Competence of College Students Majoring in Mathematics Education through Curriculum Optimization

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Journal of Contemporary Educational Research 2024年第10期8卷 83-89页

作者： Chengqiang Wang Qiuxia Wu Xiangqing Zhao zhiwei lv School of Mathematics and Physics Suqian UniversitySuqian 223800Jiangsu ProvinceChina

The innovation competence of K-12 education teachers undoubtedly plays a crucial role in fostering the innovation abilities of their students.K-12 mathematics education equips students with the critical thinking and problem-solving skills essential for their future studies in colleges and universities,helping them grasp complex techniques to address challenges in everyday life and their ***,it is of great significance to study strategies for improving the innovation competence of college students majoring in Mathematics Education,as they will likely become K-12 education mathematics teachers directly after graduating from colleges or *** this paper,we study strategies for enhancing the innovation competence of college students majoring in Mathematics Education through curriculum *** analyze and explain in detail the importance of innovation competence for college students majoring in Mathematics Education and the difficulties encountered in enhancing college students’innovation *** the help of the analysis of the importance and challenges of enhancing college students’innovation competence,we propose several strategies to improve the innovation competence of college students majoring in Mathematics Education based on curriculum *** findings presented in this paper can be applied to develop strategies for college students majoring in Physics and Chemistry Education.

关键词： K-12 education Innovation competence College students Mathematics Education Curriculum optimization

Adaptive Robust Filtering Algorithm for BDS Medium and Long Baseline Three Carrier Ambiguity Resolution

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Journal of Geodesy and Geoinformation Science 2020年第2期3卷 53-61页

作者： Yangjun GAO zhiwei lv Pengjin ZHOU Zhengyang JIA Lundong ZHANG Dianwei CONG Institute of Geospatial Information Information Engineering UniversityZhengzhou 450001China

For classical TCAR(three carrier ambiguity resolution)algorithm is affected by ionospheric delay and measurement noise,it is difficult to reliably fix ambiguity at medium and long *** improved TCAR algorithm which takes the influence of ionospheric delay into account and has good adaptive robustness is *** the basis of the non-geometric TCAR model,ionospheric delay is obtained by linearly combining extra-wide-lane with fixed ambiguity,and then wide-lane ambiguity is *** narrow-lane ambiguity by adaptive robust filtering by constructing optimal combination observation,which can effectively improve the fixed success rate of narrow-lane ambiguity and reduce the adverse effects of gross *** results show that the improved TCAR algorithm can guarantee a high fixed correct rate of wide-lane ambiguity,effectively improve fixed success rate of narrow-lane ambiguity,and has a good ability to resist gross error.

关键词： adaptive robust filter Beidou wide-lane narrow-lane ambiguity TCAR

Research on Aircraft Landing Based on GNSS/INS/Photogrammetry Integration Using Multi-rate Extended Kalman Filter

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Research on Aircraft Landing Based on GNSS/INS/Photogrammetr...

A Method of Integrity Monitoring and Assessment for BeiDou Navigation Satellite System

第九届中国卫星导航学术年会

作者： Pengjin Zhou zhiwei lv Dianwei Cong Zhengyang Jia Yangjun Gao Institute of Geospatial Information Information Engineering University

The carrier-based aircraft system is the core component of modern aircraft carrier combat system,a maritime platform for carrier-borne fighters,whether carrier aircraft can demonstrate combat power depends on the ability of the carrier-based aircraft to take off and *** order to improve the safety and reliability of shipboard on warship,this paper aims at GNSS/INS/Photogrammetry integrated navigation theory,discussed from the basic level of integrated navigation system on implementation and the performance of the whole *** mainly research is when satellite is not available,the inertial navigation error is corrected by the positioning of the Photogrammetry,to achieve high accuracy,high reliability and data refresh *** multi-rate kalman filter method is used to deal with the problem of the non-equal intervals between the INS and ***,by simulating the accuracy of the integrated navigation positioning of INS/Photogrammetry by multi-rate EKF filter,to verify the feasibility of the aircraft landing/carrier landing.

关键词： EKF Photogrammetry Integrated navigation Information Fusion

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A Method of Integrity Monitoring and Assessment for BeiDou N...

Active/passive Q-switching operation of 2 μm Tm,Ho:YAP laser with an acousto-optical Q-switch/MoS_2 saturable absorber mirror

第四届中国卫星导航学术年会

作者： Weiping Liu Jinming Hao zhiwei lv Hongfei Xie Yingguo Tian College of Navigation and Aerospace Engineering Information Engineering University

The integrity of navigation satellite system is mentioned a kind of ability that users can get warning in time when the system cannot be used. When the system cannot achieve the demand of integrity, its security will be declined. So the integrity, which is an important performance indicator, is always focused on by satellite navigation providers. In this paper, the concept of integrity is introduced. A method of integrity monitoring and assessment is presented. The real data is analyzed, and the method is validated. At last, the integrity of BeiDou is analyzed initially.

关键词： BeiDou Navigation Satellite System·integrity·monitoring and assessment·Stanford Plot· positioning precision·performance indicator

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Photonics Research 2018年第6期6卷 614-619页

作者： LINJUN LI XINING YANG LONG ZHOU WENQIANG XIE YUNLONG WANG YINGJIE SHEN YUQIANG YANG WENLONG YANG WEI WANG zhiwei lv XIAOMING DUAN MINGHUA CHEN Heilongjiang Provincial Key Laboratory of Optoelectronics and Laser Technology Heilongjiang Institute of Technology School of Electronic and Information Engineering Hebei University of Technology The Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province Harbin University of Science and Technology School of Opto-Electronic Information Science and Technology Yantai University College of Sciences Harbin University of Science and Technology National Key Laboratory of Tunable Laser Technology Harbin Institute of Technology Key Laboratory of Engineering Dielectric and Applications Ministry of EducationHarbin University of Science and Technology

The active/passive Q-switching operation of a 2 [tm a-cut Tm,Ho：YAP laser was experimentally demonstrated with an acousto-optical Q-switch/MoS2 saturable absorber mirror. The active Q-switch laser was operated for the first time, to the best of our knowledge, with an average output power of 12.3 W and a maximum pulse energy of 10.3 mJ. The passive Q-switch laser was also the first acquired with an average output power of 3.3 W and per pulse energy of 23.31 μJ, and the beam quality factors of Mx^2 = 1.06 and My^2 = 1.06 were measured at the average output power of 2 W.

关键词： Lasers Q-switched Lasers solid-state

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双楔镜腔长微调节结构研究

红外与激光工程 2023年第8期52卷 280-289页

作者：张振国李英一鞠有伦吕志伟河北工业大学先进激光技术研究中心天津300401 河北省先进激光技术与装备重点实验室天津300401 电磁空间安全全国重点实验室天津300308 哈尔滨工业大学可调谐激光技术国家重点实验室黑龙江哈尔滨150001

腔长微调节结构在光学谐振器里有重要应用。一种由双楔镜组成的腔长微调节结构被提出,该结构可实现不依赖于腔镜的腔长调节。双楔镜结构由斜面平行对立放置的两个直角楔镜构成,通过在垂直方向上驱动楔镜移动实现双楔镜内部光程改变,进... 详细信息

腔长微调节结构在光学谐振器里有重要应用。一种由双楔镜组成的腔长微调节结构被提出,该结构可实现不依赖于腔镜的腔长调节。双楔镜结构由斜面平行对立放置的两个直角楔镜构成,通过在垂直方向上驱动楔镜移动实现双楔镜内部光程改变,进而改变所处谐振腔内光路的光程。双楔镜结构对光程改变量的理论计算公式被建立,根据公式,光程改变量与楔镜楔角大小成正相关关系,与楔镜折射率成正相关关系,与楔镜振幅成线性关系。楔镜的楔角和折射率共同决定双楔镜结构的光程调节效率。经理论设计,楔角29°、折射率1.81的YAG双楔镜结构具有较高的调节效率和较小的光损耗,调节系数为0.53。实验上,以双角锥环形腔为基础,实现了双楔镜结构对腔长的调节,验证确定了双楔镜结构对腔长调节的可行性和有效性。讨论分析了双楔镜结构的变形结构:直角面对立双楔镜结构、基于正楔镜的双楔镜结构、多级双楔镜结构的光程调节性能。对比了双楔镜结构和其变形结构在光程调节效率、光损耗、光路调节难易程度的性能,确定了各种双楔镜结构在实际应用中的优缺点,为双楔镜结构的设计和选择提供了参考依据。

关键词：双楔镜腔长调节楔角 PZT

基于双状态Χ~2检测和快速强跟踪AUKF的组合导航算法

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中国惯性技术学报 2019年第6期27卷 771-777页

作者：周朋进吕志伟丛佃伟高扬骏信息工程大学郑州450000 66444部队北京100042

针对GNSS/SINS/摄影测量组合导航中某个子系统发生故障时,整个导航系统易受到故障数据污染的问题,提出了一种基于快速强跟踪AUKF的双状态卡方(Χ^2)检测数据融合方法。首先,采用快速强跟踪AUKF算法进行滤波;然后,引入卡方检验通过检测UK... 详细信息

针对GNSS/SINS/摄影测量组合导航中某个子系统发生故障时,整个导航系统易受到故障数据污染的问题,提出了一种基于快速强跟踪AUKF的双状态卡方(Χ^2)检测数据融合方法。首先,采用快速强跟踪AUKF算法进行滤波;然后,引入卡方检验通过检测UKF子滤波器输出的状态向量来定位故障参数;最后,采用强跟踪滤波准确跟踪状态矢量突变以增强系统鲁棒性,并根据自适应因子实时调整预测协方差阵以修正增益矩阵,使滤波结果不受异常信息的干扰。将提出的改进算法与常规算法分别应用于无人机着陆导航系统,结果显示:与传统UKF相比,提出的算法得到的位置误差减少了62.6%以上;与强跟踪UKF相比,导航误差也至少减小了32.6%。

关键词：组合导航快速强跟踪AUKF 状态Χ^2检测信息融合