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2011 Academic International Symposium on Optoelectronics and Microelectronics technology, AISOMT 2011

作者： Yunju, Zhang Zhongkai, Wang Yanan, Chen Youyi, Zhao National Key Laboratory of Tunable Laser Technology Harbin Institute of Technology Harbin China Science and Technology on Electr-optical Information Security Control Laboratory Liang Fang China

ISBN: (纸本)9781457707964

Using the Yb3+ and Tm3+ doped SiO2 fiber rods as the samples and ultrafast 800 nm femtosecond (fs) laser sources, the multiphoton absorption characteristics and damage threshold are experimental investigated based on the open Z-scan and nonlinear transmission measurement technology. The five-photon absorption coefficient of the Yb3+ doped fiber core has nearly tenfold increment than that of the fiber clad. But the five-photon absorption coefficient of the Tm3+-dopd fiber core is less than 5% of the fiber clad. With the incident fs laser power increasing, the five-photon absorption coefficient of three different samples is decreased. Further analyzing the open Z-scan results, the multiphoton absorption should contain the six-photon absorption process. Using the nonlinear transmission measurement technology, the damage thresholds are measured, and they are 12.1 TW/ cm2 (the Yb3+-doped fiber core) and 16.4 TW/cm 2 (fiber clad). © 2011 IEEE.

关键词： Photons

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From titanates to TiO2 nanostructures:controllable synthesis,growth mechanism,and applications

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中国科学:化学 2012年第11期42卷 1649页

作者： XU DongSheng 1,2,LI JianMing 1,YU YuXiang 1,3 & LI JingJian 1 1 Beijing National laboratory for Molecular sciences,State Key laboratory for Structural Chemistry of Unstable and Stable Species College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China 2 science and technology on electro-optical information security control laboratory,Sanhe 065201,China 3 School of Chemistry and Chemical Engineering,South China University of technology,Guangzhou 510640,China Beijing National Laboratory for Molecular Sciences State Key Laboratory for Structural Chemistry of Unstable and Stable Species College of Chemistry and Molecular Engineering Peking University Beijing 100871 China Science and Technology on Electro-Optical Information Security Control Laboratory Sanhe 065201 China School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China

The design and fabrication of nanostructures based on titanium dioxide (TiO 2) have attracted much attention because of their low cost,non-toxicity,stability,and potential applications in industry and ***,one-dimensional (1D) structured titanates have been used as titanium source to prepare TiO 2 nanostructures with various crystalline phases,shapes,sizes,exposed facets,and hierarchical *** the synthetic strategies,hydrothermal method is a facile route to controllable preparation of well-crystalline TiO 2 in one ***,we review our recent progress in transferring 1D titanates into TiO 2 nanostructures through hydrothermal method,including the transformation mechanism and applications.

关键词： TiO2 titanate hydrothermal nanostructure quasi-one-dimensional

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Variable frequency speed-regulation system of elevator using PLC technology

Variable frequency speed-regulation system of elevator using...

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3rd IEEE International Conference on Advanced Computer control, ICACC 2011

作者： Jiang, Jing Zhang, Xuesong Beijing China Science and Technology on Electro-optical Information Security Control Laboratory Hebei China

ISBN: (纸本)9781424488087

In this paper, the system of variable frequency speed-regulation based on PLC was proposed. Firstly, the overall structure of control system was determined. Inverter and programmable logic controller were chosen to complete variable frequency speed-regulation. Secondly, parameters of inverter were set by develop system hardware. PLC drive selection and I/0 points distribution were completed;rotary encoder was connected with PLC interface. Finally, the software flow charts and ladder programs were designed by analysis of elevator system on the basis of software design methods. © 2011 IEEE.

关键词： control systems

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Hardware/software co-design of embedded image processing system using systemc modeling platform

Hardware/software co-design of embedded image processing sys...

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3rd International Conference on Image Analysis and Signal Processing, IASP 2011

作者： Wang, Chong Zheng, Hong Li, Zhen School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China Science and Technology on Electro-Optical Information Security Control Laboratory Hebei 065201 China

ISBN: (纸本)9781612848808

In this paper, a SystemC-based hardware/software co-design methodology for embedded image processing system is presented. With the development of the IC process, traditional design methodologies cannot meet the requirement of complex digital image processing systems. Hardware/software co-design is the new solution for designing embedded system. SystemC is promoted by the Open SystemC Initiative, which provides a well-defined set of C++ classes to accurately describe hardware;C++ can be chosen to describe both hardware and software throughout the whole design flow to support hardware/software co-design. SystemC can provide co-design platform for an embedded image processing system. © 2011 IEEE.

关键词： Image processing

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Inverter air-conditioning control system using PID fuzzy controller

Inverter air-conditioning control system using PID fuzzy con...

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Chinese control and Decision Conference

作者： Jing, Jiang Xuesong, Zhang North China Institute of Science and Technology Beijing 101601 China Electro-optical Information Security Control Laboratory Northeast Institute of Electronics Technology Sanhe Hebei 065201 China

ISBN: (纸本)9781424487363

In this paper, temperature fuzzy controller was designed in the inverter cold and hot air-condition. The control system for inverter air conditioner was divided indoor machine and the outdoor machine. Frequency control was realized by design of hardware circuit and two-dimensional temperature controller was selected in the fuzzy control program. PID fuzzy controller suitable for real-time control was proposed. Finally, the practicability of self-adjust PID fuzzy controller was confirmed by simulation curve. It was shown that self-adjust PID fuzzy controller had a better control performance than conventional fuzzy control methods. © 2011 IEEE.

关键词： Fuzzy control

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Study of second harmonic generation technique for CO2 laser

Study of second harmonic generation technique for CO2 laser

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2011 Academic International Symposium on Optoelectronics and Microelectronics technology, AISOMT 2011

作者： Wanli, Zhao Yanan, Chen Xiusheng, Yan Shanghong, Guan Yuping, Du Weiwei, Han Science and Technology on Electro-Optical Information Security Control Laboratory Hebei China Laser Saw Department 45th Research Institute of China Electronics Technology Group Corporation Beijing China

ISBN: (纸本)9781457707964

关键词： Harmonic generation

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All solid state Mid-IR laser

All solid state Mid-IR laser

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Academic International Symposium on Optoelectronics and Microelectronics technology (AISOMT)

作者： Zhang Xiao-Juan Yang Hai-Bo Xu Hong Cai Jun Science and Technology on Electro-Optical Information Security Control Laboratory Hebei China

A Tm laser pumped Mid-IR all solid-state laser is reported. A thulium laser is used to directly drive a ZnGeP2 optical parametric oscillator (OPO) with 1.99μm output to generate the 3~5μm wavelength. Diode pumped Tm:YAP laser operates on 1.99μm, repetition frequency of 10KHz, the optical to optical conversion efficiency is 28%. The all solid-state Mid-IR laser runs at room temperature and achieves over 1W at 3~5μm with an optical to optical conversion efficiency of 5.4% starting from the pump diode.

关键词： Pump lasers Semiconductor lasers Laser beams Crystals optical pumping

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Temperature control System of Air-conditioning Based on the Fuzzy Theory

Temperature Control System of Air-conditioning Based on the ...

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2011 IEEE International Conference Mechatronics and Automation(2011 IEEE机电一体化与自动化国际会议)

作者： JIANG Jing ZHANG Xuesong China University of Mining and Technology (Beijing)Science and Technology on Electro-optical Informa Science and Technology on Electro-optical Information Security Control Laboratory Northeast Institut

Two-dimensional fuzzy temperature controller was used in the system of inverter air-conditioner to control the room temperature. Self-adjustment PID fuzzy controller was proposed to realize real-time control function. V / F control mode was used to compensate with low voltage, the average sampling algorithm was proposed to implement SPWM waveform modulation. Finally, the feasibility of self-adjustment PID fuzzy controller was verified by simulation, the actual operation results had proved that self-adjustment PID fuzzy controller had reliable, good output waveform and small harmonic wave, which could meet operational requirements of inverter air-conditioner.

关键词： Parameters Self-adjustment PID Fuzzy controller frequency conversion control fuzzy controller

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Application of Self-adjustment PID Fuzzy controller in Inverter Air-conditioning control System

Application of Self-adjustment PID Fuzzy Controller in Inver...

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2011 4th IEEE International Conference on Computer science and information technology(ICCSIT 2011)

作者： JIANG Jing ZHANG Xuesong North China Institute of Science and Technology China University of Mining and Technology Electro-optical Information Security Control Laboratory Northeast Institute of Electronics Technology

ISBN: (纸本)9781612848334

Two-dimensional fuzzy temperature controller was used to control the room temperature in the system of inverter air-conditioner,self-adjustment PID fuzzy controller was proposed to realize the function of real-time *** control mode of V /F was used to compensate with low *** average sampling algorithm was proposed to implement SPWM waveform ***,the feasibility of selfadjustment PID fuzzy controller was verified by simulation *** actual operation results had proved that selfadjustment PID fuzzy controller had reliable,good output waveform and small harmonic wave,which could meet operational requirements of inverter air-conditioner.

关键词： Parameters Self-adjustment PID Fuzzy controller frequency conversion control fuzzy controller

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Variable frequency speed-regulation system of elevator using PLC technology

Variable frequency speed-regulation system of elevator using...

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International Conference on Advanced Computer control, ICACC

作者： Jing Jiang Xuesong Zhang North China Institute of Science and Technology China University of Mining and Technology (Beijing) China Science and Technology on Electro-optical Information Security Control Laboratory Hebei China

In this paper, the system of variable frequency speed-regulation based on PLC was proposed. Firstly, the overall structure of control system was determined. Inverter and programmable logic controller were chosen to complete variable frequency speed-regulation. Secondly, parameters of inverter were set by develop system hardware. PLC drive selection and I/0 points distribution were completed; rotary encoder was connected with PLC interface. Finally, the software flow charts and ladder programs were designed by analysis of elevator system on the basis of software design methods.

关键词： Contacts

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