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Investigation of a Unified chaotic system and Its synchronization by simulations

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chinese Physics Letters 2010年第6期27卷 31-34页

作者： WU Qing-chu FU Xin-chu Michael small Department of Mathematics Shanghai University Shanghai 200444 college of Mathematics and Information science Jiangxi Normal University Nanchang 330022 Department of Electronic and Information Engineering Hong Kong Polytechnic University Hung Horn Kowloon Hong Kong

We investigate a unified chaotic system and its synchronization including feedback synchronization and adaptive synchronization by numerical simulations. We propose a new dynamical quantity denoted by K, which connects adaptive synchronization and feedback synchronization, to analyze synchronization schemes. We find that K can estimate the smallest coupling strength for a unified chaotic system whether it is complete feedback or one-sided feedback. Based on the previous work, we also give a new dynamical method to compute the leading Lyapunov exponent.

关键词： synchronization Adaptation Adaptability

An Easily Operating Polymer 1×4 Optical Waveguide switch Matrix Based on Vertical couplers

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chinese Physics Letters 2007年第6期24卷 1728-1730页

作者： Kaixin chen Pak L chu Hau Ping chan Kin s. chiang Department of Electronic Engineering City University of Hong Kong Kowloon Hong Kong cotco Holdings Ltd Science Park Hong Kong

A three-dimensional （3D） polymer thermo-optic （TO） 1 × 4 waveguide switch matrix based on vertical couplers is demonstrated. It consists of four basic 3D switch units and because of its 3D structure, its construction is compact, only 9 mm in length; moreover, the control logic of the entire switch is very simple, the light signal can be easily switched to any output port by operating only a single switch unit. The finished devices exhibit a switching extinction ratio greater than 21 dB for all of four output ports and the crosstalk between two adjacent output ports is lower than -19 dB. The rise time and the fall time of the switch matrix are 0.8ms and 1.4ms, respectively. The required electrical power to initiate the switching function for M1 switching units is about 50mW.

关键词： Operating Waveguide Vertical

MAKING DUcTILE cAsT IRON WITH EsR PROcEss

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Acta Metallurgica sinica(English Letters) 1998年第3期11卷 169-174页

作者： s.J.chu H.H.Lou Q.Niu Univ of science and Technology Beijing Beijing China

Making ductile cast iron with EsR process under D.c. condition without adding spheroidizing inoculant alloys has been studied in laboratory. The key operation of EsR for cast iron is increasing the silicon content in unrefined consumable electrodes of flake graphite cast iron and using caF2-based slags containing rare-earth or basic oxides and magnesium fluoride. The samples excel ductile cast iron produced by general technological process in fatigue strength and sealing performance.

关键词： ductile cast iron electroslag remelting nodulizing element

subtropical urban turfs： carbon and nitrogen pools and the role of enzyme activity

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Journal of Environmental sciences 2018年第3期30卷 18-28页

作者： Ling Kong LM chu school of Life sciences The Chinese University of Hong Kong Shatin NT Hong Kong SAR China department of orthopaedics & traumatology faculty of medicine the chinese university of hong kong

Urban grasslands not only provide a recreational venue for urban residents, but also sequester organic carbon in vegetation and soils through photosynthesis, and release carbon dioxide through respiration, which largely contribute to carbon storage and fluxes at regional and global scales. We investigated organic carbon and nitrogen pools in subtropical turfs and found that dissolved organic carbon（DOc） and dissolved organic nitrogen（DON）were regulated by several factors including microbial activity which is indicated by soil enzymatic activity. We observed a vertical variation and different temporal patterns in both soil DOc, DON and enzyme activities, which decreased significantly with increasing soil depths. We further found that concentration of soil DON was linked with turf age. There were correlations between grass biomass and soil properties, and soil enzyme activities. In particular, soil bulk density was significantly correlated with soil moisture and soil organic carbon（sOc）. In addition, DOc correlated significantly with DON. significant negative correlations were also observed between soil total dissolved nitrogen（TDN） and grass biomass of Axonopus compressus and Zoysia matrella. specifically, grass biomass was significantly correlated with the soil activity of urease and β-glucosidase. soil NO3-N concentration also showed negative correlations with the activity of both β-glucosidase and protease but there were no significant correlations between cellulase and soil properties or grass biomass. Our study demonstrated a relationship between soil c and N dynamics and soil enzymes that could be modulated to enhance sOc pools through management and maintenance practices.

关键词： Dissolved organic carbon (DOc)lDissolved organic nitrogen (DON)lsoil enzymelTurfgrass

Renewables finance and investment: how to improve industry with private capital in china

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Journal of Modern Power systems and clean Energy 2019年第6期7卷 1385-1398页

作者： Pingkuo LIU Penghao chu college of Economics and Management Shanghai University of Electric PowerShanghai 200090China

One purpose of stimulating financing and investment through private capital is to absorb a higher proportion of renewables and promote renewable industry *** paper first reviews the current overall situation of renewables financing and investment,and further analyzes the policy environment with respect to the development plan,regulation and special *** on the analysis of the status quo,the paper then discusses the internalities and the externalities that have driven the changes of private capital investment in renewable energy projects,illustrated by a strength,weakness,opportunity and threat(sWOT)*** ideal financing model,public-private partnership and distributed energy resource pattern are analyzed to identify key arrangements and design proper development schemes for both private investors and the *** china can overcome the defects and obstacles in a reasonable and orderly fashion,the financing and investment problem of china’s renewables industry will be solved in many *** capital in china’s renewable energy market will bring great incentive if the entire industry can select some promising sub-industries in the renewables sector and choose some appropriate operation modes.

关键词： Renewables industry Ideal financing model Public–private partnership Distributed energy resources

Homeostatic regulation of brain functions by endocannabinoid signaling

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Neural Regeneration Research 2015年第5期10卷 691-692页

作者： chu chen Neuroscience center of Excellence School of MedicineLouisiana State University Health Sciences Center

Humans have been using cannabis and its extracts for a few thousand years as a medicinal and recreational drug. How- ever, the chemical component in cannabis sativa, △9-tet- rahydrocannabinol （△9-THc）, an exogenous cannabinoid, remained unknown until it was isolated and identified as the main psychoactive ingredient （Gaoni and Mechoulam, 1964）.

关键词： cB Homeostatic regulation of brain functions by endocannabinoid signaling

An in vitro investigation of photodynamic efficacy of FosPeg■ on human colon cancer cells

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Journal of Innovative Optical Health sciences 2015年第5期8卷 86-93页

作者： Ricky W.K.Wu Ellie s.M.chu Zheng Huang Malini c.Olivo David c.W.Ip christine M.N.Yow Medical Laboratory science Department of Health Technology&Informatics Hong Kong Polytechnic UniversityHKSARChina Department of Medical science Tung Wah CollegeHKSARChina college of Photonic&Electronic Engineering Fujian Normal University Fuzhou China University of colorado Denver cancer center COUSA Department of Pharmacy National University of SingaporeSingapore

Photodynamic therapy(PDT)is a novel therapeutic approach for combating various *** involves the administration of a photosensitizer which generates singlet oxygen after light ***■ is the liposomal formulation of *** this in vitro study,the photodynamic efficacy of FosPeg■ on a human colon cancer cell line(HT29)was investigated via studying the cellular uptake of FosPeg■,FosPeg■ PDT mediated photocytotoxicity and the cell death mechanism were ***■ PDT demonstrated its antitumor effect in a drug and light dose-dependent manner in HT-29 *** dose(LD50)was achieved with 0.4g/mL of drug and 3 J/cm^(2) of light ***■ PDT triggered apoptotic cell death via activating caspase cascade and regulating cell cycle *** conclusion,FosPegr-PDT is an effective measure to combat human colon cancer cells.

关键词： FosPeg■ HT-29 apoptosis caspase-3

MIL-100(Fe)-based functional materials for water decontamination: A state of the art review

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Progress in Natural science:Materials International 2023年第4期33卷 386-406页

作者： Hongyu chu chong-chen Wang school of Environment and Energy Engineering Beijing University of civil Engineering and Architecture Beijing Key Laboratory of Functional Materials for Building structure and Environment Remediation

Iron-based metal-organic frameworks(MOFs) have been received extensive attentions over the past years due to the low biotoxicity, multi-function, and wide applications. MIL-100(Fe) bearing unique structure has become the most popular Fe-based MOF up to now, and it is well-recognized as desirable environmental function material,especially for water purification. To provide systematic insight into MIL-100(Fe) for oriented design of novel materials, we review the recent progress and characteristics of MIL-100(Fe)-based materials, including MIL-100(Fe)-based composites, derivatives, and monoliths for water decontamination via adsorption, separation,and advanced oxidation processes(AOPs). Based on existing challenges and limitations discussed in this review,we further propose the future perspectives of MIL-100(Fe)-based materials for sustainable application in water remediation.

关键词： MIL-100(Fe) Water purification Adsorption separation Advanced oxidation process

Motor cortical circuit adaptations in parkinsonism

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Neural Regeneration Research 2024年第10期19卷 2107-2108页

作者： Hong-Yuan chu Department of Neurodegenerative science Van Andel Research InstituteGrand RapidsMIUSA Aligning science Across Parkinson’s(AsAP)collaborative Research Network

Parkinson's disease is a chronic and progressive neurodegenerative disorder characterized by the loss of dopaminergic neurons in the substantia nigra pars compacta,which leads to the featured motor impairment of parki... 详细信息

关键词： parkin impairment rigidity