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Chinese Physics B 2017年第1期26卷 220-223页

作者： run-Qin Xu Zi-Kai Dong Jin-rong Tian Ke-Xuan Li Yan-rong Song College of Applied Sciences Beijing University of Technology Beijing 100124 China

We present a nonlinear ytterbium-doped fiber amplifier based on enhanced nonlinear effects that can produce a flat broadband spectrum ranging from 1050–1225 nm with a maximum average output power of 7.8 W at 14 W pump *** repetition rate is 89 MHz. Using a pair of gratings and two knife edges as a filter, wavelength tunable picosecond pulses of tens to hundreds of milliwatts can be obtained in the broadband spectrum range. The output power, pulse width, and spectrum（center wavelength and linewidth） are adjusted by tuning the distance of the grating pair and/or the knife *** the distance between the two gratings at 15 mm and keeping the output spectrum linewidth at approximately 20 nm,the shortest pulse width obtained is less than 1 ps centered at 1080 nm. The longest wavelength of the short pulses is around1200 nm, and its output power and pulse width are 40 m W and 5.79 ps, respectively. The generation of a flat broadband spectrum is also discussed in this paper.

关键词： tunable ultra-short pulse broadband spectrum nonlinear amplifier

Hybrid supraparticles of carbon dots/porphyrin for multifunctional tongue-mimic sensors

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Chinese Chemical Letters 2022年第5期33卷 2715-2720页

作者： rong Hu Xingchun Zhai Yubin ding Guoyue Shi Min Zhang School of Chemistry and Molecular Engineering Shanghai Key Laboratory for Urban Ecological Processes and Eco-RestorationShanghai Key Laboratory of Multidimensional Information ProcessingEngineering Research Centre for Nanophotonics and Advanced Instrument(Ministry of Education)East China Normal UniversityShanghai 200241China Department of Chemistry College of SciencesNanjing Agricultural UniversityNanjing 210095China

Supraparticles(SPs),such as assembly of inorganic components with organic,have made tremendous attention in biochemical analysis,which represents a novel but challenging research ***,a single-SPs multifunctional fluorescent sensor array has been developed for high-throughput detection of heavy metal ions in biofluids,which is based on an inorganic/organic hybrid SPs consisting of carbon dots(CDs)and an easily available porphyrin[5,10,15,20-tetra(4-carboxyphenyl)porphyrin(TCPP)].TCPP can aggregate with the CDs to form the assembly(CDs/TCPP SPs)through the electrostatic andπ-πstacking *** are two independent and clearly separated fluorescence emission peaks at 470 and 668 nm in the resultant CDs/TCPP SPs under 380 nm *** a proof-of concept design,F 470,F 668,F 668/F 470 of SPs are chosen as three sensor components to constitute our sensor *** the addi-tion of metal ions,three sensor components can generate different fluorescence response patterns for discriminating 11 heavy metal ions via principal component analysis(PCA).Additionally,thiols can read-ily capture Cu^(2+)to switch the fluorescence of CDs/TCPP initially altered by Cu^(2+).Hence,CDs/TCPP-Cu^(2+)ensemble is further demonstrated to be a powerful sensor array for pattern recognition of 7 thiols and even chiral recognition of cysteine *** novel strategy avoids the tanglesome synthesis of multiple sensing probes and dedicates an innovative method for the facile establishment of tongue-mimic sensors,which would prospectively sprout more homologous assumptions to broaden its application toward more biosensing fields.

关键词： Supraparticles Carbon dots Porphyrin Pattern recognition sensor array Heavy metal ions Thiols

Aerodynamic stability evolution tendency of suspension bridges with spans from 1000 to 5000 m

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Frontiers of Structural and Civil Engineering 2023年第10期17卷 1465-1476页

作者： Yejun ding Lin ZHAO rong XIAN Gao LIU Haizhu XIAO Yaojun GE State Key Laboratory of Disaster Reduction in Civil Engineering Tongji UniversityShanghai 200092China Key Laboratory of Transport Industry of Wind Resistant Technology for Bridge Structures Tongji UniversityShanghai 200092China Guangdong Highway Construction Co. Ltd.Guangzhou 510600China CCCC Highway Bridges National Engineering Research Center Co. Ltd.Beijing 100088China China Railway Major Bridge Reconnaissance and Design Institute Co. Ltd.Wuhan 430056China

Aerodynamic instability owing to aerostatic and flutter-related failures is a significant concern in the wind-resistant design of long-span suspension *** on the dynamic characteristics of suspension bridges with spans ranging from 888 to 1991 m,we proposed fitted equations for increasing spans and base *** element models of suspension bridges with increasing span from 1000 to 5000 m were *** structural parameters were optimized to follow the fitted *** analyze the aerodynamic instability,streamlined single-box section(SBS),lattice truss section(LTS),narrow slotted section(NSS),and wide slotted section(WSS)were *** performed three-dimensional(3-D)full-mode flutter analysis and nonlinear aerostatic instability *** flutter critical wind speed continuously decreases with span growth,showing an unlimited approaching *** aerostatic instability,the instability wind speed decreases with span to approximately 3000 m,and increases when the span is in the range of 3000 to 5000 *** aerostatic instability wind speed with SBS or LTS girder would be lower than observed maximal gust wind speed,indicating the probability of aerostatic *** study proposes that suspension bridge with span approximately 3000 m should be focused on both aerostatic instability and flutter,and more aerodynamic configuration optimistic optimizations for flutter are essential for super long-span suspension bridges with spans longer than 3000 m.

关键词： suspension bridge super long-span finite element model aerodynamic instability aerodynamic configuration

Mg-doped layered oxide cathode for Na-ion batteries

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Chinese Physics B 2022年第6期31卷 125-131页

作者： Yuejun ding Feixiang ding Xiaohui rong Yaxiang Lu Yong-Sheng Hu Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100190China

Na-ion batteries(NIBs)are regarding as the optimum complement for Li-ion batteries along with the rapid development of stationary energy storage *** order to meet the commercial demands of cathodes for NIBs,O3-type Cu containing layered oxide Na_(0.9)0Cu_(0.22)Fe_(0.30)Mn_(0.48O_(2))with good comprehensive performance and low-cost element components is very promising for the practical ***,only part of the Cu^(3+)/Cu^(2+)redox couple participated in the redox reaction,thus impairing the specific capacity of the cathode ***,Mg2+-doped O3-Na0.90Mg0.08Cu0.22Fe0.30Mn0.40O_(2)layered oxide without Mn3+was synthesized successfully,which exhibited improved reversible specific capacity of 118 mAh/g in the voltage range of 2.4-4.0 V at 0.2 C,corresponding to the intercalation/deintercalation of 0.47 Na+(0.1 more than that of Na_(0.9)0Cu_(0.22)Fe_(0.30)Mn_(0.48O_(2))).This work demonstrates an important strategy to obtain advanced layered oxide cathodes for NIBs.

关键词： copper redox layered oxide cathode Na-ion batteries energy storage

Hemorrhagic Bartholin’s cyst in a woman using anti-platelet medication:A case report and review of the literature

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World Journal of Clinical Cases 2023年第24期11卷 5755-5761页

作者： Yi-rong Li Dah-Ching ding Department of Obstetrics and Gynecology Hualien Tzu Chi HospitalBuddhist Tzu Chi Medical Foundation and Tzu Chi UniversityHualien 970Taiwan

BACKGROUND We report the case of a postmenopausal female with a hemorrhagic Bartholin’s cyst who has been using an antiplatelet *** SUMMARY A postmenopausal woman,84 years of age,had a medical history of hypertension,diabetes mellitus,coronary artery disease(three-vessel disease),chronic kidney disease(stage 3),and *** patient has been taking clopidogrel,an antiplatelet medication,for several *** presented at our outpatient clinic complaining of painful swelling over her left vulva for several days.A Bartholin’s cyst over the left vulva was suspected,and the patient underwent marsupialization under local anesthesia,which was *** the incision procedure,bright-red blood with some blood clots was discharged,and a hemorrhagic Bartholin’s cyst was *** was no recurrence of the hemorrhagic Bartholin’s cyst during the 6-mo subsequent follow-up *** Hemorrhagic Bartholin’s cysts rarely *** report the case of a postmenopausal female with a hemorrhagic Bartholin’s cyst who had been on antiplatelets and was successfully treated with *** recurrence was noted during the 6-mo follow-up *** females taking antiplatelets should be cautious of bleeding when presenting with a Bartholin’s cyst.

关键词： Hemorrhagic Bartholin’s cyst Anti-platelet Marsupialization Menopause Case report

Microstructure and mechanical properties of Ti44Al6Nb alloys with different cerium contents

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Rare Metals 2020年第4期39卷 402-407页

作者： Hong-Ze Fang Rui-run Chen Xiao-Yu Chen Zhi-Kun Ma Hong-Sheng ding Jing-Jie Guo School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Department of Tank Repair People's Liberation Army Armored Force Engineering InstituteChangchun 130117China

Ti44A16 Nb-based alloy ingots with different cerium(Ce)contents(0,0.05,0.10,0.15,0.20;at%)were prepared by non-consumable vacuum arc smelting furnace(WK-Ⅱ).The surface quality,macrostructure,microstructure,compressive properties and fracture morphology of these ingots were *** results show that Ce has few influences on the surface *** can refine grain size and the average grain size decreases from 0.50 to 0.19 mm with the increase of Ce ***,the microstructure morphology of these ingots changes from large lamellar microstructure to dual-phase *** addition of Ce,CeO and AlCe3 are formed during melting and solidifying,which act as the core of heterogeneous nucleation and refine the *** compressive testing results show that Ce can improve strength and *** ultimate compressive strength increases from 1156.2 to 1472.2 MPa with Ce content increasing from 0 at%to 0.20 at%.The compression ratio is improved from 10.2%to 15.3%with Ce content increasing from 0 at%to 0.10 at%.The refined crystalline strengthening and grain boundary strengthening are the main reasons for the improvement of compressive property.

关键词： Ce TiAl alloy Compressive property Grain refining

N-doped MoS_(2) via assembly transfer on an elastomeric substrate for high-photoresponsivity,air-stable and stretchable photodetector

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Nano Research 2022年第11期15卷 9866-9874页

作者： Shuyan Qi Weifeng Zhang Xiaoli Wang Yifan ding Yan Zhang Jiakang Qiu Ting Lei run Long Nan Liu Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Beijing National Laboratory for Molecular Sciences(BNLMS) Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter of Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China

As a direct-bandgap semiconductor,single-layer MoS_(2) has gained great attention in optoelectronics,especially wearable ***,MoS_(2) exhibits poor photoresponsivity on a stretchable substrate due to intrinsic low carrier density and a large number of scattering centers on polymer *** air-stable yet strong dopants on MoS_(2) has been *** addition,the roughness,hydrophobicity and susceptibility to organic solvents of polymer surface are critical roadblocks in the development of stretchable high-performance MoS_(2) ***,we realize a stretchable and stable photodetector with high photoresponsivity by combining n-type dopant((4-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)phenyl)dimethylamine,N-DMBI)with MoS_(2) and assembly transfer *** is found electron tends to transfer from N-DMBI to MoS_(2) and the effect is maintained after the integrable photodetector transferred directly by elastic substrate styrene-ethylene-butylene-styrene(SEBS),even after being exposed to the air for 20 days,which benifits greatly from the encapsulation of *** increased carrier density greatly promotes carrier injection efficiency and photogenerated electron–hole separation efficiency at the metal–semiconductor interface,thus offering a significantly improved photoresponsivity in MoS_(2) ***,such photodetector shows great durability to stretch,which can remain functional after stretched 100 cycles within its stretch *** strategy opens a new avenue to fabricate high-photoresponsivity stretchable electronics or optoelectronics of two-dimensional(2D)materials.

关键词： transition metal dichalcogenides charge transfer stretchable photodetectors organic molecules

HEMODYNAMICS FOR ASYMMETRIC INLET AXIAL VELOCITY PROFILE IN CAROTID BIFURCATION MODEL

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Journal of Hydrodynamics 2008年第5期20卷 656-661页

作者： ding Zu-rong LIU Bin YANG Shuo XIA Yan Department of Engineering Mechanics Shanghai Jiao Tong University Shanghai 200240 China

The asymmetric inlet velocity profile has been observed in phantom model using LDA and in health subjects using Magnet Resonance （MR）. The effects of asymmetric inlet axial velocity profile on the flow field and the Wall Shear Stress （WSS） of carotid bifurcation were numerically studied herein with the TF-AHCB model, The results show that the Wall Shear Stress Gradient （WSSG） in the front part of the sinus for inward-tilting inlet axial velocity profile is nearly 2 times of that for the symmetric one in the beginning of systole, the end of systole, and diastole, respectively. The area of WSS below 5× 10^-3 Pa at the outer wall of the sinus for outward-tilting inlet axial velocity profile is 1.5 times of that for the inward-tilting one during diastole of the cardiac cycle. The asymmetric inlet velocity profiles can reduce the flow velocity near the inner wall of the sinus, which has been normally considered a high velocity region. It is concluded that besides bifurcation geometry and flow waveform, the asymmetry of inlet velocity profile is probably a factor influencing atherosclerosis.

关键词： carotid bifurcation numerical simulation inlet velocity profile Wall Shear Stress(WSS) Wall Shear Stress Gradient(WSSG)

Fault geometrical model of Dujiangyan section in Longmenshan fault zone

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Earthquake Science 2018年第3期31卷 126-136页

作者： Hu-rong Duan Sheng-Lei Chen run Li Quan-Chao Yan College of Geomatics Xi'an University of Science and Technology

The focal mechanism solution on the seismic fault plane can reflect the geometric and kinematic characteristics of faults, and it is an important way to further study the fine structure of fault plane. From the focal mechanism solution of the earthquakes around the Dujiangyan fault in Longmenshan fault zone, we derived the average dip angle of Dujiangyan fault is 45.1° based on the seismic moment tensor theory. In order to refine the fault geometry structure, this paper decomposed it into multiple sub-fault planes along the length and width of the fault plane and forms a number of models A13, B13, A23 a, A23 b, A23 c, B23 a,B23 b and B23 c, then calculated the sub-fault’s dip of each model. In order to clarify exactly which one of the fault models is closest to the real fault model, the fault slip was carried out for each model in turn, then compared the surface displacement of each model with GPS observations. The results show that B23 c model with high dip in shallow and small dip in deep is the best model, the lengths of each subfault of Dujiangyan fault from south to north are 33 km, 21 km and 46 km, respectively. When the depth of the fault bottom is about 11 km, the dip angles are 70.56°, 67.41° and 45.55°.When the depth of the fault bottom is about 30 km, The fault dip angles are 44.55°, 29.18° and 44.25°.

关键词： focal mechanism solution seismic moment tensor fault dip fault fine structure Dujiangyan fault

2022 Monkeypox outbreak:Why is it a public health emergency of international concern?What can we do to control it?

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World Journal of Clinical Cases 2022年第30期10卷 10873-10881页

作者： Shi-Yan Ren Jing Li rong-ding Gao Department of Laser and Vascular Surgery Aviation General HospitalChina Medical UniversityBeijing 100012China Department of Infectious Disease Aviation General HospitalChina Medical UniversityBeijing 100012China

The World Health Organization(WHO) called the recent monkeypox(MPX)outbreak a Public Health Emergency of International Concern on July 23,*** United States of America(US) alarmed the recent MPX outbreak as the US public health emergency on August 4,*** early May 2022,more than 35000 MPX cases and 12 deaths had been reported to WHO from 92 countries and territories by August 17,2022,and MPX cases continue rising rapidly with improved surveillance,access to diagnosis,and continuous virus spreading *** 99% MPX cases are men,of which 95% cases are men who have sex with *** evidence of MPX being sexually transmitted infections(STIs) is found;however,a high percentage(25%) of concurrent STIs and frequent anogenital symptoms suggest transmission through local inoculation during close intimate contact or sexual *** approaches including a comprehensive international vaccination strategy and adequate supplies are mandatory to prevent MPX ***,vaccination,MPX scrutiny and careful monitoring,and crossborder collaborations with international sectors are practical strategy to contain MPX *** are educated to reduce the risk of exposure and to reduce the number of sexual partners especially new ones,to avoid contacting travelers from epidemic regions or animals that may carry MPX virus,and avoid traveling to endemic areas.

关键词： Monkeypox Outbreak Public Health Emergency of International Concern vaccination Infectivity Transmission Man who have sex with man