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Seasonal variability in CDOM absorption and fluorescence properties in the Barataria Basin,louisiana,Usa

Journal of Environmental Sciences 2010年第10期22卷 1481-1490页

作者： Shatrughan Singh Eurico D'sa Erick Swenson Department of Oceanography and Coastal Sciences Louisiana State University

Absorption and fluorescence properties of chromophoric dissolved organic matter （CDOM） along a 124 km transect in the Barataria Basin, a large estuary located in louisiana, Usa, were investigated during high and low flow periods of the Mississippi River in the spring and winter of 2008-2009. Mean CDOM absorption at 355 nm from the marine to the freshwater end member stations ranged from （3.25 ± 0.56） to （20.76 ± 2.43） m^-1 for the three month high flow period whereas it varied from （1.48 ± 1.08） to （25.45 ± 7.03） m^-1 for the same stations during low flow period. Corresponding salinity values at these stations indicated the influence of river and shelf exchanges in the lower basin and precipitation and runoff in the upper basin. An inverse relationship of CDOM absorbance and fluorescence with salinity observed in the basin could he a useful indicator of salinity. CDOM fluorescence also varied over a large range showing an approximately 8 to 12-fold increase between the marine and freshwater end members for the two flow seasons. Excitation-emission matrix spectral plots indicated the presence of various fluorescence components with highest being the A-peak, lowest the T-peak, and the C and M-peaks showing similar trends along the transect. During low flow season the A/C ratio were well correlated with station locations indicating increased terrestrial influence towards the upper basin. CDOM absorption and fluorescence at 355 nm were highly correlated and independent of CDOM sources suggesting that fluorescence could be used to characterize CDOM in the basin.

关键词： Barataria Basin chromophoric dissolved organic matter CDOM fluorescence excitation-emission matrix

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Bioinspired nanotransducers for neuromodulation

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Nano Research 2024年第2期17卷 618-632页

作者： Fan Yang Xiang Wu sa Cai Guosong Hong Department of Materials Science and Engineering Stanford UniversityStanfordCA 94305USA Wu Tsai Neurosciences Institute Stanford UniversityStanfordCA 94305USA School of Science Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107China

The field of neuromodulation has experienced significant advancements in the past decade,owing to breakthroughs in disciplines such as materials science,genetics,bioengineering,photonics,and *** convergence of these fields has resulted in the development of nanotransducers,devices that harness the synergies of these diverse *** nanotransducers,essential for neuromodulation,often draw inspiration from energy conversion processes found in nature for their unique *** this review,we will delve into the latest advancements in wireless neuromodulation facilitated by optical,magnetic,and mechanical *** will examine their working principles,properties,advantages,and limitations in comparison to current methods for deep brain neuromodulation,highlighting the impact of natural systems on their design and ***,we will underscore potential future directions,emphasizing how continued progress in materials science,neuroscience,and bioengineering might expand the horizons of what is achievable with nanotransducer-enabled neuromodulation.

关键词： bioinspired synthesis neuromodulation mechanoluminescence focused ultrasound nanotransducers sono-optogenetics

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Electronic properties and photodegradation ability of Nd-TiO_(2)for phenol

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Journal of Rare Earths 2022年第7期40卷 1063-1072页

作者： Zhimin Zhao Jinjia liu Gala sa Aiju Xu Inner Mongolia Key laboratory of Green Catalysis College of Chemistry and Environmental ScienceInner Mongolia Normal UniversityHohhot 010022China State Key laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of SciencesTaiyuan 030001China National Energy Center for Coal to Clean Fuels Synfuels China Co.Ltd.Beijing 101400China

In this study,the photocatalytic activity of Nd-TiO_(2)photocatalysts obtained by common hydrothermal method was evaluated by practical experiments and theoretical calculations based on density functional theory(DFT).The synthesized photocatalysts were characterized by X-ray diffraction(XRD),N_(2)adsorption-desorption,Fourier transform infrared spectroscopy(FT-IR),high resolution transmission electron microscopy(HRTEM),X-ray photoelectron spectroscopy(XPS),UV-Vis diffuse reflectance spectroscopy(DRS),and photoluminescence(Pl)to study their physical/chemical prope *** the same time,the photoelectronic performance was also *** photodegradation ability of asprepared photocatalysts and the effect of Nd doped amount and photocatalysts dosage were investigated by the photodegradation of phenol(30 mg/l)under 400 W metal halide lamp(UV-Vis).The effect of Nd on electronic properties of TiO_(2)and adsorption ability of phenol were *** show the red-shift wavelength of 0.5 mol%Nd-TiO_(2),indicating that its absorption capacity is stronger than pristine TiO_(2)in the same wavelength *** result of DFT calculations demonstrates that the optical bandgap of Nd-TiO_(2)is profoundly reduced,thus the light absorption ability is promoted,which will be responsible for the enhanced photocatalytic performance of Nd-TiO_(2).0.5 mol%Nd is an optimum value for photodegradation phenol,and phenol can be completely degraded by 0.5 mol%Nd-TiO_(2)for 210 min,the higher catalytic performance is derived from the efficient separation of e-/h+***,the adsorption energy calculations of phenol on TiO_(2)(101)and Nd-TiO_(2)(101)demonstrate that the Nd doping can significantly enhance the adsorption ability of phenol on catalyst surfaces because of the formation of Nd-O *** last,the stability measurement through four recycles exhibits that 0.5 mol%Nd-TiO_(2)possesses excellent stability.

关键词： TiO_(2) Hydrothermal method Density functional theory Phenol Photodegradation Rare earths

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Developing Weibull-based diameter distributions for the major coniferous species in Heilongjiang Province,China

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Journal of Forestry Research 2023年第6期34卷 1803-1815页

作者： Qila sa Xingji Jin Timo Pukkala Fengri li Key laboratory of Sustainable Forest Ecosystem Management Ministry of EducationNortheast Forestry UniversityHarbin 150040People’s Republic of China University of Eastern Finland 80101 JoensuuFinland

Diameter distribution models play an important role in forest inventories,growth prediction,and *** Weibull probability density function is widely used in *** a number of methods have been proposed to predict or recover the Weibull distribution,their applicability and predictive performance for the major tree species of China remain to be *** in sample plots of three even-aged coniferous species(larix olgensis,Pinus sylvestris and Pinus koraiensis)were measured both in un-thinned and thinned stands to develop parameter prediction models for the Weibull probability density *** least squares(OlS)and maximum likelihood regression(MlER),as well as cumulative distribution function regression(CDFR)were used,and their performance *** results show that MlER and CDFR were better than OlS in predicting diameter distributions of tree *** produced the best results in terms of fitting *** on the error statistics calculated for different age groups,CDFR was considered the most suitable method for developing prediction models for Weibull parameters in coniferous plantations.

关键词： Parameter prediction Maximum likelihood regression Cumulative distribution function regression

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Intelligent Real-Time IoT Traffic Steering in 5G Edge Networks

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Computers, Materials & Continua 2021年第6期67卷 3433-3450页

作者： sa Math Prohim Tam Seokhoon Kim Department of Software Convergence Soonchunhyang UniversityAsan31538Korea Department of Computer Software Engineering Soonchunhyang UniversityAsan31538Korea

In the Next Generation Radio Networks(NGRN),there will be extreme massive connectivity with the Heterogeneous Internet of Things(HetIoT)*** millimeter-Wave(mmWave)communications will become a potential core technology to increase the capacity of Radio Networks(RN)and enable Multiple-Input and Multiple-Output(MIMO)of Radio Remote Head(RRH)***,the challenging key issues in unfair radio resource handling remain unsolved when massive requests are occurring *** imbalance of resource utilization is one of the main issues occurs when there is overloaded connectivity to the closest RRH receiving exceeding *** handle this issue effectively,Machine learning(Ml)algorithm plays an important role to tackle the requests of massive IoT devices to RRH with its obvious capacity *** paper proposed a dynamic RRH gateways steering based on a lightweight supervised learning algorithm,namely K-Nearest Neighbor(KNN),to improve the communication Quality of Service(QoS)in real-time IoT *** supervises the model to classify and recommend the user’s requests to optimal RRHs which preserves higher *** experimental dataset was generated by using computer software and the simulation results illustrated a remarkable outperformance of the proposed scheme over the conventional methods in terms of multiple significant QoS parameters,including communication reliability,latency,and throughput.

关键词： Machine learning Internet of Things traffic steering mobile edge computing

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Hua Tuo’s Wu Qin Xi (Five Animal Frolics) Movements and the logic behind It

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Chinese Medicine and Culture 2018年第3期1卷 127-134页

作者： saša Balaneskovic Serbian Qigong Association BelgradeSerbia

The key proposition of this hypothesis is logic behind the order of movements of Hua Tuo’s qigong Wu Qin Xi(Five animal frolics).To date,there were many discussions about connection of the movements of Wu Qin Xi with existing TCM theories and why Hua Tuo made it in that particular *** experts are saying that there is no connection but if all stories of Hua Tuo’s abilities and knowledge were half-truth,he wouldn’t let even the order of movements of qigong that he created be just a random *** is exploring different views on Taiji movement direction,Wu Xing and connection between animals in Wu Qin Xi,lo Shu square and Sun wheel and proposing possible solution to the question“Why Hua Tuo made such order of animals in Wu Qin Xi?”by analyzing and and cross referencing the common ground between theories and bridging the gap the we were left without any written explanation from the master *** progress and confirmation of this hypothesis requires deeper research and cooperation between Qigong expert historians.

关键词： Five Animal Frolics Qigong Hua Tuo Taiji movement orientation Wu Qin Xi Qigong Wu Xing

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Silk-based nerve guidance conduits with macroscopic holes modulate the vascularization of regenerating rat sciatic nerve

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Neural Regeneration Research 2025年第6期20卷 1789-1800页

作者： Carina Hromada Patrick Heimel Markus Kerbl lászlóGál Sylvia Nürnberger Barbara Schaedl James Ferguson Nicole Swiadek Xavier Monforte Johannes C.Heinzel Antal Nógrádi Andreas H.Teuschl-Woller David Hercher Department life Science Engineering University of Applied Sciences Technikum WienViennaAustria Austrian Cluster for Tissue Regeneration ViennaAustria ludwig Boltzmann Institute for Traumatology The Research Center in Cooperation with AUVAViennaAustria University Clinic of Dentistry Medical University of ViennaViennaAustria Department of Plastic Reconstructive and Aesthetic SurgeryLandesklinikum Wiener Neustadt2700 Wiener NeustadtAustria Department of Anatomy Histology and EmbryologyAlbert Szent-Györgyi Medical SchoolUniversity of SzegedSzegedHungary Medical University of Vienna Department of Orthopedics and Trauma SurgeryDevision of Trauma SurgeryViennaAustria Department of Hand- PlasticReconstructive and Burn SurgeryBG Unfallklinik TuebingenUniversity of TuebingenTuebingenGermany

Peripheral nerve injuries induce a severe motor and sensory deficit. Since the availability of autologous nerve transplants for nerve repair is very limited, alternative treatment strategies are sought, including the use of tubular nerve guidance conduits(tNGCs). However, the use of tNGCs results in poor functional recovery and central necrosis of the regenerating tissue, which limits their application to short nerve lesion defects(typically shorter than 3 cm). Given the importance of vascularization in nerve regeneration, we hypothesized that enabling the growth of blood vessels from the surrounding tissue into the regenerating nerve within the tNGC would help eliminate necrotic processes and lead to improved regeneration. In this study, we reported the application of macroscopic holes into the tubular walls of silk-based tNGCs and compared the various features of these improved silk^(+) tNGCs with the tubes without holes(silk^(–) tNGCs) and autologous nerve transplants in an 8-mm sciatic nerve defect in rats. Using a combination of micro-computed tomography and histological analyses, we were able to prove that the use of silk^(+) tNGCs induced the growth of blood vessels from the adjacent tissue to the intraluminal neovascular formation. A significantly higher number of blood vessels in the silk^(+) group was found compared with autologous nerve transplants and silk^(–), accompanied by improved axon regeneration at the distal coaptation point compared with the silk^(–) tNGCs at 7 weeks postoperatively. In the 15-mm(critical size) sciatic nerve defect model, we again observed a distinct ingrowth of blood vessels through the tubular walls of silk^(+) tNGCs, but without improved functional recovery at 12 weeks postoperatively. Our data proves that macroporous tNGCs increase the vascular supply of regenerating nerves and facilitate improved axonal regeneration in a short-defect model but not in a critical-size defect model. This study suggests that further optimizatio

关键词： axon regeneration blood vessel functional recovery macroporous nerve lesion peripheral nerve repair sciatic nerve silk-based nerve guidance conduit vascularization

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labeled yon Neumann Architecture for Software-Defined Cloud

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Journal of Computer Science & Technology 2017年第2期32卷 219-223页

作者： Yun-Gang Bao sa Wang, Member, CCF State Key laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

As cloud computing is moving forward rapidly, cloud providers have been encountering great challenges： long tail latency, low utilization, and high interference. They intend to co-locate multiple workloads on a single server to improve the resource utilization. But the co-located applications suffer from severe performance interference and long tail latency, which lead to unpredictable user experience. To meet these challenges, software-defined cloud has been proposed to facilitate tighter coordination among application, operating system and hardware. Users＇ quality of service （QoS） requirements could be propagated all the way down to the hardware with differential management mechanisms. However, there is little hardware support to maintain and guarantee users＇ QoS requirements. To this end, this paper proposes labeled von Neumann Architecture （lvNA）, which introduces a labelling mechanism to convey more software＇s semantic information such as QoS and security to the underlying hardware. lvNA is able to correlate labels with various entities, e.g., virtual machine, process and thread, and propagate labels in the whole machine and program differentiated services based on rules. We consider lvNA to be a fundamental hardware support to the software-defined cloud.

关键词： software-defined cloud von Neumann architecture tail latency performance interference

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Review of the role of ionic liquids in two-dimensional materials

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Frontiers of physics 2023年第4期18卷 177-197页

作者： Na sa Meng Wu Hui-Qiong Wang Engineering Research Center of Micro-nano Optoelectronic Materials and Devices Ministry of EducationFujian Key Laboratory of Semiconductor Materials and ApplicationsCI Center for OSEDand Department of PhysicsXiamen UniversityXiamen 361005China Department of Physics and Department of New Energy Science and EngineeringXiamen University MalaysiaSepang 43900Malaysia

Ionic liquids(Ils)are expected to be used as readily available“designer”solvents,characterized by a number of tunable properties that can be obtained by modulating anion and cation combinations and ion chain *** them,its high ionicity is outstanding in the preparation and property modulation of two-dimensional(2D)*** this review,we mainly focus on the Ils-assisted exfoliation of 2D materials towards large-scale as well as ***,electric-field controlled Ils-gating of 2D material systems have shown novel electronic,magnetic,optical and superconducting properties,attracting a broad range of scientific research ***,Ils have also been extensively applied in various field *** summarize the recent developments of Ils modified 2D material systems from the electrochemical,solar cells and photocatalysis aspects,discuss their advantages and possibilities as“designer solvent”.It is believed that the design of Ils accompanying with diverse 2D materials will not only solve several scientific problems but also enrich materials design and engineer of 2D materials.

关键词： ionic liquids two-dimensional materials liquid phase exfoliation ionic liquid-gating electrochemical capacitors solar cells photocatalysis

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A Stable Polyoxometalate-based Coordination Polymer for light Driven Degradation of Organic Dye Pollutant

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Chinese Journal of Structural Chemistry 2021年第11期40卷 1449-1455,1406页

作者： WANG Man WU Xiao-Yuan WANG sa-sa lU Can-Zhong College of Chemistry Fuzhou UniversityFuzhou 350108China CAS Key laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China Xiamen Institute of Rare Earth Materials Chinese Academy of SciencesXiamen 361021China

A new POM-based coordination polymer,[Cl_(2)Cu^(Ⅰ)_(11)(trz)_(8)][H_(3)SiW_(12)O_(40)](1),was successfully obtained under hydrothermal *** compound was characterized by single-crystal X-ray diffraction,TGanalyses,IR spectra and PXRD *** 1 shows extreme stability and outstanding catalytic activity to the degradation of organic dye pollutant.

关键词： polyoxometalate-based coordination polymer photocatalysis 1,2,4-triazole

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