检索结果-南通市图书馆

Magnetic field stabilization system designed for the cold-atom coherent population-trapping clock

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2024年第8期22卷 7-12页

作者： Chang Zhan Zhu Ma Jiatao Wu Maojie Li Chengyin Han Bo Lu Chaohong lee Laboratory of Quantum Engineering and Quantum Metrology School of Physics and AstronomySun Yat-sen UniversityZhuhai 519082China Institute of Quantum Precision Measurement State Key Laboratory of Radio Frequency Heterogeneous IntegrationShenzhen UniversityShenzhen 518060China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China Quantum Science Center of Guangdong-hong Kong-Macao Greater Bay Area Shenzhen 518045China

Accurate control of magnetic fields is crucial for cold-atom experiments,often necessitating custom-designed control systems due to limitations in commercially available power ***,we demonstrate precise and flexible control of a static magnetic field by employing a field-programmable gate array and a feedback *** setup enables us to maintain exceptionally stable current with a fractional stability of 1 ppm within 30 *** error signal of the feedback loop exhibited a noise level of 10~(-5)A·Hz~(-1/2)for control bandwidths below 10 k *** this precise magnetic field control system,we investigate the second-order Zeeman shift in the context of cold-atom coherent population-trapping (CPT)*** analysis reveals the second-order Zeeman coefficient to be 574.21 Hz/G~2,with an uncertainty of 1.36 Hz/G~***,the magnetic field stabilization system we developed allows us to achieve a second-order Zeeman shift below10~(-14),surpassing the long-term stability of current cold-atom CPT clocks.

关键词： cold-atom coherent population-trapping clock Zeeman coefficient magnetic field stabilization system

Acceptor-planarized typeⅠphotosensitizer for lipid droplet-targeted two-photon photodynamic therapy by ferroptosis

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第7期67卷 2392-2402页

作者： Jie Sha Weimin Liu Jiasheng Wu Yanping Wang Xuewei Li Haohui Ren Zhi Pang Wenjun Zhang Chun-Sing lee Pengfei Wang Key Laboratory of Photochemical Conversion and Optoelectronic Materials CityU-CAS Joint Laboratory of Functional Materials and DevicesTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Center of Super-Diamond and Advanced Films&Department of Materials Science and Engineering City University of Hong KongHong KongChina

Two-photon photodynamic therapy(TP-PDT)has garnered significant attention because of its excellent depth of tissue penetration and high spatiotemporal ***,the limited targeting ability and oxygen dependency of photosensitizers(PSs)significantly hinder the effectiveness of photodynamic therapy in hypoxic tumor ***,we designed and synthesized two lipid droplet(LD)-targeted two-photon PSs(TBPCP and TBCP)by reducing benzene rings to achieve“acceptor planarization”.Notably,acceptor planarization not only enhanced the intramolecular charge transfer but also transferred the photochemical reaction from typeⅡ(TBPCP)to typeⅠ(TBCP).Under the irradiation of 940 nm femtosecond pulsed laser,TBPCP and TBCP showed bright two-photon-excited fluorescence and excellent LD targeting in living *** TBPCP(typeⅡPS),the outstanding TP-PDT efficacy of TBCP(typeⅠPS)under hypoxic conditions could be obtained in both cellular experiments and multicellular tumor spheroids(MCTS)***,both TBPCP and TBCP could induce the lipid peroxidation in the typeⅠor typeⅡPDT due to the location of LD,depleting GSH and inactivating GPX4 to induce nonprogrammed ferroptosis in cells.

关键词： two-photon photodynamic therapy lipid droplet targeting acceptor planarization hypoxia tumor ferroptosis

Development and application of photocatalytic coating for roadside NO_(x) mitigation in hong Kong

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第3期35卷 153-157页

作者： Xinwei Li Pengge Wang Shuwen Han Yu Huang Wingkei Ho Steven Sai Hang Ho Shun-cheng lee Meng Wang Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina State Key Laboratory of Loess and Quaternary Geology(SKLLQG)and Key Laboratory of Aerosol Chemistry and Physics Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710061China Department of Science and Environmental Studies The Education University of Hong KongHong KongChina Division of Atmospheric Sciences Desert Research InstituteRenoNV 89512United States

A facile chemical method for the development of photocatalytic coating products was proposed based on practical application perspective for the hong Kong roadside nitrogen oxides(NO_(x))***_(2)-based photocatalytic coating PC-C film with crystallized size of around 5–6 nm was synthesized with the peptization of H_(2)O_(2).The PC-C coating possesses a super-hydrophilicity surface and is proven to have a NO_(x)degradation rate of 46.8%with an optimum pH level of *** addition,the PC-C coating presents a promising photocatalytic NO_(x)degradation compared with other commercially available coating products and P25 when applied on two building materials of poly-methyl methacrylate(PMMA)and concrete surface.A weather resistance simulation and a 180-day on-site field trial were carried out the attenuation effects of photocatalytic coating applied in outdoor *** on epidemiological estimation and field investigation,hospital admissions for respiratory diseases(HARD)and mortality cases(MC)could be reduced with the application of PC-C coating along the street *** work demonstrates the feasibility of air pollution control measures for the local roadside NO_(x)using photocatalytic technology,offering promising health benefits with environmental remediation.

关键词： Photocatalysis Coating NO_(x) mitigation hong Kong Roadside

Inferior vena cava reconstruction in extended right hepatectomy

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2024年第5期23卷 533-534页

作者： Karin KY Ho Sui Ling Sin Kin Pan Au Henry HY lee Daniel TL Chan Albert Chan Department of Surgery The University of Hong Kong102 Pok Fu Lam RoadHong KongChina Department of Surgery Yan Chai Hospital7 Yan Chai StreetHong KongChina State Key Laboratory of Liver Research(Li Ka Shing Faculty of Medicine The University of Hong Kong)102 Pok Fu Lam RoadHong KongChina

To the Editor : Barcelona Clinic Liver Cancer(BCLC) Stage C hepatocellular carcinoma(HCC) with vascular invasion has been considered unresectable. However, the curative rate from systemic treatment is rather dismal. Even with the use of immunotherapy, complete remission is less than 10% [ 1 ]. On the contrary, recent advances in transplant oncology, especially in the application of liver transplant-related surgical techniques in complex liver resections, make the operation possible for patients with locally advanced HCC who were previously considered to be unresectable [ 2 ]. We hereby present the surgical management of a patient with giant HCC in right liver lobe with inferior vena cava(IVC) invasion.

关键词： invasion vena Liver

Value of controlled attenuation parameter in fibrosis prediction in nonalcoholic steatohepatitis

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2019年第33期25卷 4959-4969页

作者： Jung Il lee Hyun Woong lee Kwan sik lee Department of Internal Medicine Gangnam Severance Hospital Yonsei University College of Medicine

BACKGROUND Liver stiffness measurement(LSM)tends to overestimate fibrosis stage in nonalcoholic fatty liver disease(NAFLD).Controlled attenuation parameter(CAP),provided by LSM device,has been introduced for noninvasive quantification of hepatic *** To determine the role of CAP values in predicting liver fibrosis stage by LSM in nonalcoholic steatohepatitis(NASH).METHODS One hundred eighty-four patients with biopsy proven NASH had LSM and CAP evaluated at *** them,130 patients had 1-year follow up LSM and analyzed for the changes of LSM after pioglitazone or ursodeoxycholic acid(UDCA)*** In Kleiner fibrosis stage F0-1,LSM values increased at higher CAP tertile(P=0.001),and in F2,at middle and higher tertiles(P=0.027).No difference across CAP tertiles was noticed in F3-4(P=0.752).Receiver operating characteristic curve for LSM cutoff in diagnosis of F≥2 identified 8.05 kPa for lower CAP tertile,9.35 kPa for middle,and 10.55 kPa for high *** changes in proportion of significant fibrosis(F≥2)were assessed among pioglitazone and UDCA treated patients considering CAP values,pioglitazone treated patients demonstrated decrease in proportion of high *** In patient with NAFLD,interpretation of LSM in association with CAP scores may provide helpful information sparing unnecessary liver biopsy.

关键词： Fibroscan Controlled attenuation parameter Liver stiffness Nonalcoholic steatohepatitis Liver fibrosis

High-performance and wavelength-transplantable on-chip Fourier transform spectrometer using MEMS in-plane reconfiguration

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2024年第8期12卷 1730-1740页

作者： HENG CHEN HUI ZHANG JING ZHOU CHEN MA QIAN HUANG HANXING WANG QINGHUA REN NAN WANG CHENGKUO lee YIMING MA School of Microelectronics Shanghai UniversityShanghai 201800China Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology Shanghai UniversityShanghai 201800China Department of Electrical and Electronic Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Center for Intelligent Sensors and MEMS(CISM) National University of SingaporeSingapore 117608Singapore

On-chip spectrometers with high compactness and portability enable new applications in scientific research and industrial *** transform(FT)spectrometers have the potential to realize a high signal-to-noise *** we propose and demonstrate a generalized design for high-performance on-chip FT *** spectrometer is based on the dynamic in-plane reconfiguration of a waveguide coupler enabled by an integrated comb-drive actuator *** electrostatic actuation intrinsically features ultra-low power *** coupling gap is crucial to the spectral *** in-plane reconfiguration surmounts the lithography accuracy limitation of the coupling gap,boosting the resolution to 0.2 nm for dual spectral spikes over a large bandwidth of 100 nm(1.5–1.6μm)within a compact footprint of 75μm×1000μ***,the in-plane tuning range can be large enough for arbitrary wavelengths to ensure the effectiveness of spectrum *** a result,the proposed spectrometer can be easily transplanted to other operation bands by simply scaling the structural *** a proof-of-concept,a mid-infrared spectrometer is further demonstrated with a dual-spike reconstruction resolution of 1.5 nm and a bandwidth of 300 nm(4–4.3μm).

关键词： waveguide tuning lithography

Bruce lee: A Kung Fu Life and the Way of Martial Arts

在线全文

学校读者我要写书评

暂无评论

China Book International 2024年第3期 112-113页

作者： Guan Wenming Huang Dechao Liu hong South China Normal University 不详

This book collects the latest research results at home and abroad in the felds of Bruce lee's life history,kungfu movies,kung fu,and philosophy for more than 40 years,and not only deeply describes the infuence of the Lifamily in Shangcun,Jun'an Town,Shunde District,Foshan City,Guangdong Province,and the Ho family in hong Kong region on Bruce lee's growth,but also deeply excavates the cultural traditions and ideological genes rooted in Bruce lee,and includes various research results on Bruce lee in the context of the metaverse,highlighting the epochal and academic nature of Bruce lee's research.

关键词： Bruce epoch deeply

Rational design and evaluation of UV curable nano-silver ink applied in highly conductive textile-based electrodes and flexible silver-zinc batteries

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第6期101卷 294-307页

作者： hong hong Lihong Jiang Huating Tu Jiyong Hu Kyoung-sik Moon Xiong Yan Ching-ping Wong Key Laboratory of Textile Science&Technology Ministry of EducationDonghua UniversityShanghai 201620China Key Laboratory of High Performance Fibers&Products Ministry of EducationDonghua UniversityShanghai 201620China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332United States

The possibility of printing conductive ink on textiles is progressively researched due to its potential benefits in manufacturing functional wearable electronics and improving wearing ***,few studies have reported the effect of conductive ink formulation on electrodes directly screen-printed on flexible substrates,especially printing UV curable conductive ink on common *** this work,a novel UV curable nano-silver ink with short-time curing and low temperature features was developed to manufacture the fully flexible and washable textile-based electrodes by screen *** aim of this study was to determine the influence of ink formulation on UV-curing speed,degree of conversion,morphology and electrical properties of printed ***,the application demonstration was *** curing speed and adhesion of ink was found depending dominantly on the type of prepolymer and the functionality of monomer,and the type of photoinitiator had a decisive effect on the curing speed,degree of double bond conversion and morphology of printed *** nano-silver content is key to guarantee the suitable screen-printability of conductive ink and therefore the uniformity and high conductivity of textile-based ***,an ink formulation with 60 wt%nano-silver meets the potential application *** electrode with 1.0 mm width showed significantly high electrical conductivity of 2.47×10^(6)S/m,outstanding mechanical durability and satisfactory *** high-performance of electrodes screen-printed on different fabrics proved the feasibility and utility of UV curable nano-silver *** addition,the application potential of the conductive ink in fabricating electronic textiles(e-textiles)was confirmed by using the textile-based electrodes as the cathodes of silverzinc *** anticipate the developed UV curable conductive ink for screen-printing on textiles can provide a novel design opportunity for flexible and

关键词： Nano-silver ink formulation UV curing Textile-based electrodes High conductivity Mechanical durability Washability

Gradient Si-and Ti-doped Fe_(2)O_(3) hierarchical homojunction photoanode for efficient solar water splitting:Effect of facile microwave-assisted growth of Si-FeOOH on Ti-FeOOH nanocorals

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第2期77卷 27-37,I0002页

作者： Tae sik Koh Periyasamy Anushkkaran Weon-sik Chae Hyun Hwi lee Sun Hee Choi Jum Suk Jang Division of Biotechnology College of Environmental and Bioresource SciencesJeonbuk National UniversityIksan 54596Republic of Korea Daegu Center Korea Basic Science InstituteDaegu 41566Republic of Korea Pohang Accelerator Laboratory Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea

The construction of a homojunction is an effective approach for addressing issues such as slow charge separation and charge-transfer kinetics in *** the present work,we designed a gradient Si-and Ti-doped Fe_(2)O_(3) homojunction photoanode to improve the photoelectrochemical(PEC)performance of a Ti-doped Fe_(2)O_(3) ***-FeOOH nanocorals were synthesized using a hydrothermal process,and Si-FeOOH was grown on Ti-FeOOH nanocorals using a rapid and facile microwaveassisted(MW)*** varying the MW irradiation time,the thickness of the Si/Ti:Fe_(2)O_(3) photoanode was adjusted and an optimized 3-Si/Ti:Fe_(2)O_(3) photoelectrode was achieved with a significantly enhanced photocurrent density(1.37 mA cm^(-2) at 1.23 V ***)and a cathodic shift of the onset potential(150 mV)compared with that of bare Ti-Fe_(2)O_(3).This enhanced PEC performance can be ascribed to homojunction formation and Si gradient *** Si dopant increased the donor concentration and the formation of a homojunction improved the intrinsic built-in electric field,thereby promoting charge separation and charge ***,the as-formed homojunction passivated the surfacetrapping states,consequently improving the charge transfer efficiency(60%at 1.23 VRHE)at the photoanode/electrolyte *** findings could pave the way for the microwave-assisted fabrication of diverse efficient homojunction photoanodes for PEC water splitting applications.

关键词： Homojunction Microwave-assisted Hematite Gradient doping PEC water splitting