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New Frequency Standard Comparison System Based on the Group Quantization Phase Processing

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Chinese Journal of Electronics 2019年第2期28卷 392-397页

作者： du baoqiang DENG Ran SUN Xiyan FU Qiang School of Electronic Information Engineering Zhengzhou University of Light Industry School of Information and Communication Guilin University of Electronic Technology

A new frequency standard comparison system is proposed based on the group quantization phase processing. By shortening the width of phase coincidence fuzzy area and capturing the best group phase coincidences, we reduce the randomness of the counting gate and improve the measurement precision of the comparison system. The method is based on the Fieldprogrammable gate array（FPGA）, which not only retains the advantage using phase synchronization detection technology to overcome the ±1-word counting error, but also accelerates the system response time, simplifies the measurement equipment, and reduces the development cost and power consumption. The experimental results show that the method is reasonable and scientific, and the comparison accuracy of the system can reach the E-12s;level, obviously superior to the measurement accuracy of the traditional frequency standard comparison method,which has a wide application and popularization value.

关键词： Frequency standard comparison Group quantization phase Greatest common factor period Phase group synchronization

High-precision time and frequency measurement method combining time-space conversion and different frequency phase detection

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Science China(Physics,Mechanics & Astronomy) 2013年第11期56卷 2110-2115页

作者： du baoqiang WANG YanFeng CUI GuangZhao GUO ShuTing DONG ShaoFeng LIU Dan School of Electric and Information Engineering Zhengzhou University of Light Industry Institute of Signals and Data Processing Xidian University

According to the time&space conversion relations and different frequency phase detection principle,an ultra-high precision time&frequency measurement method is proposed in this *** higher accuracy and stability of the speed of light and electromagnetic signals during the transmission in space or a specific medium enable the measurement of short time interval which uses the coincidence detection of signal’s transmission delay in *** measurement precision better than 10 picoseconds can be easily *** method develops the length vernier utilizing the stability of signal’s transmission delay,minimizes the fuzzy region of phase coincidence between the standard frequency signal and the measured signal,approaches the best phase coincidences and therefore improves the measurement precision which is higher than the precision provided by the traditional methods based on frequency ***,the method costs less than the traditional methods and can also solve the problem of the measurement of super-high *** results show the method can improve the measurement precision to 10 12/s in the time&frequency domain.

关键词： time and space conversion delay-time phase shift different phase coincidence detection group phase difference

Different Frequency Synchronization Theory and Its Frequency Measurement Practice Teaching Innovation Based on Lissajous Figure Method

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Journal of Beijing Institute of Technology 2018年第2期27卷 198-205页

作者： Xin Geng Songlin Li Guangming Huang baoqiang du Jianhua Chen School of Electronic Information Engineering Zhengzhou University of Light IndustryZhengzhou 450001China Science and Technology on Electronic Information Control Laboratory Chengdu 610036China

According to the requirement of multi-parameter time and frequency measurement without frequency normalization,a different frequency synchronization theory is proposed based on Lissajous figure method and the variation lawof Lissajous figure which are used in practice teaching of frequency measurement. The theory can achieve high-precision transmission and comparison of time and frequency and precise locking and tracking of phase and frequency,improve the level of scientific research on time and frequency for postgraduate,and promote practice teaching innovation of time frequency measurement for undergraduate. Utilizing the ratio of horizontal and vertical inflection point of the Lissajous figure,the nominal frequency of the measured signal is precisely *** frequency deviation between the measured frequency and its nominal frequency can be obtained by combining the turning cycle of the Lissajous figure. By observing the phase relationship between the frequency standard signal and the measured signal,the accurate measurement of the frequency is implemented. Experimental results showthat the direct measurement and comparison better than the 10-11 order of magnitude with common frequency source can be finished between any signal *** frequency measurement method based on the theory has the advantage of simple operation,quick measurement speed,small error,lownoise and high measurement precision. It plays an important role in time synchronization,communications,metrology,scientific research,educational technology practice and equipment and other fields.

关键词： Lissajous figure different frequency synchronization frequency measurement

Phase group synchronization between any signals and its physical characteristics

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Science China(Physics,Mechanics & Astronomy) 2014年第4期57卷 674-679页

作者： du baoqiang SHI LinLin CHEN YaoMing DONG ShaoFeng YANG ZhiGang CAO LingZhi GUO ShuTing School of Electric and Information Engineering Zhengzhou University of Light Industry The 20th Research Institute of China Electronics Technology Group Corporation Institute of Signals and Data Processing Xidian University The 27th Research Institute of China Electronics Technology Group Corporation

The phase group synchronization between any signals is further revealed,which is based on proposing the new concepts of the greatest common factor frequency,the least common multiple period,quantized phase shift resolution,equivalent phase comparison frequency and so *** the problem of phase comparison and processing between different frequency signals is solved and shown in *** the basic principle and the variation law of group phase difference,the frequency stability better than 10-14/s can be easily obtained in the time&frequency measurement and control domain,and experimental results also show the phase relations between atomic energy level transition signal and the locked crystal oscillator signal in an active hydrogen atomic clock are strict phase group synchronization,and locked precision with 10-13/s can be reached based on phase group *** phase group synchronization can provide technical support to frequency linking among radio frequency,microwave and light frequency.

关键词： equivalent phase comparison frequency least common multiple period group phase difference group period phase processing phase group synchronization

Study of thermoelectric enhanced SERS and photocatalysis with ZnO-metal nanorod arrays

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Nano Research 2023年第4期16卷 5427-5435页

作者： baoqiang du Jibing Tan Chang Ji Mingrui Shao Xiaofei Zhao Jing Yu Chao Zhang Chuansong Chen Hui Pan Baoyuan Man Zhen Li School of Physics and Electronics Collaborative Innovation Center of Light Manipulations and ApplicationsShandong Normal UniversityJinan 250014China Institute of Applied Physics and Materials Engineering University of MacaoMacao 999078China

Herein,a thermoelectric induced surface-enhanced Raman scattering(SERS)substrate consisting of ZnO nanorod arrays and metal nanoparticles is *** intensities of SERS signals are further enhanced by an order of magnitude and the limit of detection(LOD)for the molecules is reduced by at least one order of magnitude after the application of a thermoelectric *** enhancement mechanism is analyzed carefully and thoroughly based on the experimental and theoretical results,thus proving that the thermoelectric-induced enhancement of the SERS signals should be classified as a chemical ***,it is proved that the electric regulation mechanism is universally applicable,and the fabricated substrate realizes enormous enhancements for various types of molecules,such as rhodamine 6G,methyl orange,crystal violet,amaranth,and biological ***,the proposed electric-induced SERS(E-SERS)substrate is also realized to monitor and manipulate the plasmon-activated redox *** believe that this study can promote the course of the research on ESERS and plasmon-enhanced photocatalysts.

关键词： ZnO electric-induced surface-enhanced Raman scattering(E-SERS) temperature gradient photocatalysis local surface plasmon resonance(LSPR)

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负反馈技术在电涡流传感器检测中的应用

微计算机信息 2007年第25期23卷 163-164,170页

作者：杜保强河南职业技术学院

电涡流传感器经常用来检测和控制压力、温度、位移、振动等非电量,但由于受温度特别是高温的影响,使其存在着严重的测量误差。本文提出了一种由深度负反馈组成的闭环电路测试系统,提高了电涡流传感器的稳定性和温漂抑制能力。通过比较... 详细信息

电涡流传感器经常用来检测和控制压力、温度、位移、振动等非电量,但由于受温度特别是高温的影响,使其存在着严重的测量误差。本文提出了一种由深度负反馈组成的闭环电路测试系统,提高了电涡流传感器的稳定性和温漂抑制能力。通过比较空载和加载两种情况下的测试,结果证明了该系统的有效性和先进性。

关键词：测试原理测试系统负反馈技术实验分析

Ferroelectrically modulate the Fermi level of graphene oxide to enhance SERS response

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Opto-Electronic Advances 2023年第11期6卷 44-53页

作者： Mingrui Shao Chang Ji Jibing Tan baoqiang du Xiaofei Zhao Jing Yu Baoyuan Man Kaichen Xu Chao Zhang Zhen Li Institute of Materials and Clean Energy School of Physics and ElectronicsShandong Normal UniversityJinan 250014China State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310030China

Surface-enhanced Raman scattering(SERS)substrates based on chemical mechanism(CM)have received widespread attentions for the stable and repeatable signal output due to their excellent chemical stability,uniform molecular adsorption and controllable molecular ***,it remains huge challenges to achieve the optimal SERS signal for diverse molecules with different band structures on the same ***,we demonstrate a graphene oxide(GO)energy band regulation strategy through ferroelectric polarization to facilitate the charge transfer process for improving SERS *** Fermi level(Ef)of GO can be flexibly manipulated by adjusting the ferroelectric polarization direction or the temperature of the ferroelectric ***,kelvin probe force microscopy(KPFM)is employed to quantitatively analyze the Ef of ***,the density functional theory calculations are also performed to verify the proposed modulation ***,the SERS response of probe molecules with different band structures(R6G,CV,MB,PNTP)can be improved through polarization direction or temperature changes without the necessity to redesign the SERS *** work provides a novel insight into the SERS substrate design based on CM and is expected to be applied to other two-dimensional materials.

关键词： surface-enhanced Raman scattering(SERS) ferroelectric PMN-PT graphene oxide(GO) photo-induced charge transfer(PICT)

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火电厂原煤斗蓬煤处理方法探讨

电力建设 2000年第6期21卷 27-28,32页

作者：杜葆强北京石景山发电总厂北京市100041

火电厂原煤斗内的原煤粒度较细 ,当煤中含水量增加时 ,煤颗粒之间、煤与煤斗壁之间摩擦力增大 ,由于上部煤的重量形成压力 ,使含水分较多的煤挤压成团产生蓬煤。蓬煤影响磨煤机的出力和机组的安全稳定运行。目前有几种处理蓬煤的方法 ,... 详细信息

火电厂原煤斗内的原煤粒度较细 ,当煤中含水量增加时 ,煤颗粒之间、煤与煤斗壁之间摩擦力增大 ,由于上部煤的重量形成压力 ,使含水分较多的煤挤压成团产生蓬煤。蓬煤影响磨煤机的出力和机组的安全稳定运行。目前有几种处理蓬煤的方法 ,但效果均不理想。采用内部疏松装置 ,通过内部扰动使煤松动 ,可有效解决蓬煤问题 ,并且对原煤斗改动量少 ,能自动工作 ,适合火电厂原煤斗的技术改造。

关键词：火电厂原煤斗内部疏松装置蓬煤处理

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基于Linux的行情服务系统

计算机应用与软件 2006年第8期23卷 139-141页

作者：杜保强薛明河南职业技术学院河南郑州450046 河南工业大学河南郑州450052

证券行情服务系统是用于证券市场的通用计算机系统。实现的模式通常是基于UNIX操作系统的Clinet客户端软件以及小型机硬件平台。提出一种基于Linux操作系统的Browser浏览器及PC服务器集群硬件平台的解决模式,叙述了该解决方案的具体实... 详细信息

证券行情服务系统是用于证券市场的通用计算机系统。实现的模式通常是基于UNIX操作系统的Clinet客户端软件以及小型机硬件平台。提出一种基于Linux操作系统的Browser浏览器及PC服务器集群硬件平台的解决模式,叙述了该解决方案的具体实现过程,并对软件系统的自主性进行了详细的探讨。该系统成本较低,能够脱离开发环境,便于网络运行。分析与实际运行结果表明：该系统具有稳定、可靠等优点。

关键词： Linux 集群证券行情服务