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Output Quantized Feedback with Bounded System Noise

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Output Quantized Feedback with Bounded System Noise

第26届中国控制与决策会议

作者： yuqiang long Qiang Ling Zhe Yan Feng Li Song Wang University of Science and Technology of China

It is of great value to study control systems employing sensors and actuators which are geographically separated. In this paper, we study a system with bounded noise and stabilize it under output quantized feedback. Some people have done research on full-state observable linear systems. Here we consider the general（not necessarily fullstate observable） output feedback situation with system noise. We use dynamic quantization strategy and prove the quantized system with a state observer can achieve practical stability at the same minimum bit rate in the full-state ***, we give an upper bound of the estimation error. At last, we show simulation result of the state of output feedback control on the system.

关键词： Bounded noise output feedback dynamic quantization quantization.

来源： cnki会议评论

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富氮进气对发动机NOx排放及性能的影响

汽车工程 2010年第9期32卷 769-773页

作者：金英爱高淳马纯强隆愈强高青 Y．Y．Yan 吉林大学汽车动态模拟国家重点实验室长春130025 吉林大学汽车工程学院长春130025 University of Nottingham Nottingham NG7 2RD UK

通过变进气组分,研究富氮进气对发动机NOx排放和性能的影响。结果表明,富氮进气组分对发动机动力性、燃油经济性和排放性能有显著影响:燃烧受到抑制,燃烧温度降低,NOx排放显著减少。但富氮进气将不同程度地导致发动机功率下降,比油耗升... 详细信息

通过变进气组分,研究富氮进气对发动机NOx排放和性能的影响。结果表明,富氮进气组分对发动机动力性、燃油经济性和排放性能有显著影响:燃烧受到抑制,燃烧温度降低,NOx排放显著减少。但富氮进气将不同程度地导致发动机功率下降,比油耗升高,HC和CO排放增加。在低富氮程度下,NOx排放可显著降低,而其它的不利影响较小。另外,富氮界限较窄,超出界限将对燃烧产生明显的不利影响,因此富氮组分界限的合理确定和协同优化控制极其重要。

关键词：发动机变进气组分富氮排放性能

Theoretical analysis of PAM-N and M-QAM BER computation with single-sideband signal

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Science China(Information Sciences) 2021年第8期64卷 172-181页

作者： Dongxu LU Xian ZHOU yuqiang YANG Jiahao HUO Jinhui YUAN Keping long Changyuan YU Alan Pak Tao LAU Chao LU Beijing Engineering and Technology Research Center for Convergence Networks and Ubiquitous Services University of Science and Technology Beijing Department of Electrical Engineering The Hong Kong Polytechnic University Department of Electronic and Information Engineering The Hong Kong Polytechnic University

In this paper, the theoretical bit error rate(BER) of N-level pulse amplitude modulation(PAMN)and M-ary quadrature amplitude modulation(M-QAM) have been studied and compared under different scenarios, including(i) PAM with intensity modulation with direct detection(IM/DD) and field modulation with detection(FMD)(including coherent detection and single-sideband modulation with direct detection(SSB-DD)), and(ii) QAM with coherent detection and SSB-DD. Considering the relationship between the symbol spacing and signal-to-noise ratio(SNR), we provide the mathematical BER equations, including the optical signal-to-noise ratio(OSNR) and carrier-to-signal power ratio(CSPR), especially for PAM *** verify the validity of our theoretical expressions for SSB systems, transmissions with 224-Gb/s SSBPAM4/16 QAM signals using the Kramers-Kronig(KK) receiver were implemented on a unified optical system platform. The simulation results agreed well with theoretical calculations both in back-to-back(BtB) and120-km transmission scenarios, which showed that the BER evaluation methods can serve as a theoretical guidance and system assessment criteria for SSB scenarios.

关键词： N-level pulse amplitude modulation(PAM-N) M-ary quadrature amplitude modulation(MQAM) BER computation single-sideband(SSB) Kramers-Kronig receiver

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Properties and Microstructures of Full Graded Concrete Containing Varied Impurity Aggregate

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Journal of Wuhan University of Technology(Materials Science) 2017年第2期32卷 321-329页

作者：杨梦卉何真 LIN yuqiang State Key Laboratory of Water Resources & Hydropower Engineering Science Wuhan University Wuhan 430072 China Changjiang River Scientific Research Institute Wuhan 430010 China

We investigated mechanical properties of concretes made with impurity aggregates of different combinations. Besides the mechanisms were explored by EDS, CT, and hardness testing. The results showed that fully rust-stained and surface rust-stained sandstone aggregate had significant adverse impact on the compressive strength of concrete while sandstone aggregate had a much more obvious impact on the ultimate tension of concrete. Concrete crack was more prone to expand along surfaces and the micro-hardness of interfacial transition zone of different aggregates was ranked in decreasing trend as sandstone, slate, SR sandstone, marble, and FR sandstone. The cluster growth of long needle-like ettringite crystal and strong preferential growth trend of Ca（OH）2 crystals would result in wider interfacial transition zone range of concretes made with fully rust-stained sandstone and marble aggregate, respectively. Therefore, the impurity aggregate content should be strictly controlled during aggregate selection.

关键词： aggregate concrete mechanical property interfacial transition zone

Passively Q-switched diode-pumped Tm,Ho:LuVO4 laser with a black phosphorus saturable absorber

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Chinese Physics B 2019年第9期28卷 203-205页

作者： Linjun Li Tianxin Li long Zhou Jianying Fan yuqiang Yang Wenqiang Xie Shasha Li The Higher Educational Key Laboratory for Measuring&Control Technology and Instrumentations of Heilongjiang Province Harbin University of Science and TechnologyHarbin 150080China Heilongjiang Province Key Laboratory of Optoelectronics and Laser Technology&Heilongjiang Province Engineering Technology Research Center of Solid-state Laser Technology and Application Heilongjiang Institute of TechnologyHarbin 150050China

We presented a passively Q-switched(PQS) diode-pumped c-cut Tm, Ho:LuVO_4 laser with a black phosphorus saturable absorber for the first *** PQS mode, an average output power of 0.86 W and a peak power of 2.32 W were acquired from the Tm, Ho:LuVO4 laser with the pump power of 14.55 W, corresponding to a pulse width of 2.89 μs,a pulse repetition rate of 71.84 kHz, and a pulse energy of about 6.70 μJ.

关键词： passively Q-switched(PQS) technology Tm Ho:LuVO4 crystal pulse width

Integrated solar capacitors for energy conversion and storage

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Nano Research 2017年第5期10卷 1545-1559页

作者： Ruiyuan Liu yuqiang Liu Haiyang Zou Tao Song Baoquan Sun Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft: Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215123 China School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332-0245 USA

Solar energy is one of the most popular clean energy sources and is a promising alternative to fulfill the increasing energy demands of modem society. Solar cells have long been under intensive research attention for harvesting energy from sunlight with a high power-conversion efficiency and low cost. However, the power outputs of photovoltaic devices suffer from fluctuations due to the intermittent instinct of the solar radiation. Integrating solar cells and energy- storage devices as self-powering systems may solve this problem through the simultaneous storage of the electricity and manipulation of the energy output. This review the research progress in the integration of new-generation solar cells with supercapacitors, with emphasis on the structures, materials, performance, and new design features. The current challenges and future prospects are discussed with the aim of expanding research and development in this field.

关键词： solar cell supercapacitor,energy conversion andstorage,integrated devices

Do Institutional Investors Drive Financialization of Real Sectors?

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China Finance and Economic Review 2019年第2期8卷 25-46页

作者： Wei Liu yuqiang Cao School of Management of Jinan University China School of Accounting of Guangdong University of Forcign Studies China

The trend that China's economy is being"off the real to the virtual"is a typical fact in recent years.A large number of firms invest and hold financial asscts,the investing and profit-generating channels of the real sectors are becoming more and more *** utilizing sample of Chinese A-share manufacturing firms from the year of 2007 to 2015,and using fixed effect model,this paper investigates the driving factor of the financialization of real *** results show that:(1)institutional investors,overall,drive the financialization of real sectors;(2)instiutional investors are heterogeneous,that is,long-term institutional investors do not show a significant correlation with the financialization of real sectors;however,short-term institutional investors significantly drive the financialization of real sectors;(3)the *** further investigation show that the driving effect of institutional investors on financialization is more significant in state owned firms than that in private *** findings have implications as follows:guiding the investment behavior of institutional investors,leading financial sector to serve the real economy,promoting financial structure reform.

关键词： institutional investors “off the real to the virtual” real sectors financialization

Microsatellite marker development and population genetic analysis revealed high connectivity between populations of a periwinkle Littoraria sinensis(Philippi,1847)

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Journal of Oceanology and Limnology 2022年第3期40卷 1097-1109页

作者： Mengyu LI yuqiang LI Tengfei XING Yulong LI Jinxian LIU CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

Periwinkle Littoraria sinensis is a widely distributed gastropod in rocky intertidal zone of the northwestern Pacifi *** examine genetic diversity and genetic connectivity among coastal populations of *** in China,1636 pairs of primers were successfully designed using whole-genome shotgun sequencing,de novo assembly,and a bioinformatics pipeline *** highly variable polymorphic markers were selected to genotype 351 individuals from 15 *** of nine microsatellite loci were retained for population genetic analysis,and weak genetic differentiation among populations were detected,suggesting high gene flow among *** long planktonic larval duration of *** might have played an important role in the high gene flow among populations.A tendency of genetic differentiation between north and south populations of *** was detected,which might be resulted from isolation due to lowered sea level in the last glacial ***,the newly founded populations along the coast of Jiangsu Province were closely related to populations to the south of the Changjiang(Yangtze)River estuary,suggesting that the main source of the newly founded populations is from natural rocky populations south of the estuary.

关键词： population genetics Littoraria sinensis gastropod simple-sequence repeats

DNA Reaction Network Mimicking the Basic Steps of Synaptic Communication

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Chinese Journal of Chemistry 2023年第11期41卷 1313-1318页

作者： Minghao Hu yuqiang Hu Wenqian Yuan Zhen Zhang Tongbo Wu School of Pharmacy Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei430030 China

Biological systems use intricate networks of chemical reactions to exchange information. How to simulate complex systems with simple strand-displacement reactions is crucial to broaden the application scenario of the DNA reaction network. Here, we report the artificial DNA reaction network to mimic the operation and function of biological information transfer via strand-displacement reaction. DNA is used as simple artificial analogs to schematize structures and transmit information. Using chemical synapses in neural networks as an example, we show that the proposed network enables core functions of biological systems, such as the long-term potential of synapses, which underpin learning and memory. Also, we performed the simple “silicon mimetic” to link electronic circuits to chemical network-based biological structures. As such, synaptic communication simulated by the DNA reaction network provides a complete demonstration for designing artificial reaction networks based on the essence of information interaction.

关键词： Reaction networks Strand-displacement cascades DNA nanotechnology Synapse Nucleic acids Fluorescence Synthetic biology