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Nuclear Science and Techniques 2024年第3期35卷 40-52页

作者： Ding-Han Zhu Xiong Zhang Xiao-Qiang Li Peng Li yan-bin wang Shuang Zhang State Key Laboratory of NBC Protection for Civilian Beijing 102205China

In high-altitude nuclear detonations,the proportion of pulsed X-ray energy can exceed 70%,making it a specific monitoring signal for such *** pulsed X-rays can be captured using a satellite-borne X-ray detector following atmospheric *** quantitatively analyze the effects of different satellite detection altitudes,burst heights,and transmission angles on the physical processes of X-ray transport and energy fluence,we developed an atmospheric transmission algorithm for pulsed X-rays from high-altitude nuclear detonations based on scattering *** proposed method is an improvement over the traditional analytical method that only computes direct-transmission *** traditional analytical method exhibits a maximum relative error of 67.79% compared with the Monte Carlo *** improved method reduces this error to within 10% under the same conditions,even reaching 1% in certain ***,its computation time is 48,000 times faster than that of the Monte Carlo *** results have important theoretical significance and engineering application value for designing satellite-borne nuclear detonation pulsed X-ray detectors,inverting nuclear detonation source terms,and assessing ionospheric effects.

关键词： High-altitude nuclear detonation Atmospheric transmission Pulsed X-rays Scattering correction Analytical method Monte Carlo method

Clinical comprehensive treatment protocol for managing diabetic foot ulcers:A retrospective cohort study

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World Journal of Clinical Cases 2024年第17期12卷 2976-2982页

作者： yan-bin wang yan Lv Guang-Yu Li Ji-Ting Zheng Qing-Xin Jiang Ran Wei Department of Vascular Surgery Harbin 242 HospitalHarbin 150066Heilongjiang ProvinceChina First Department of General Surgery Harbin 242 HospitalHarbin 150066Heilongjiang ProvinceChina

BACKGROUND Diabetic foot ulcers(DFUs)are a common complication of diabetes,often leading to severe infections,amputations,and reduced quality of *** current standard treatment protocols for DFUs have limitations in promoting efficient wound healing and preventing complications.A comprehensive treatment approach targeting multiple aspects of wound care may offer improved outcomes for patients with *** hypothesis of this study is that a comprehensive treatment protocol for DFUs will result in faster wound healing,reduced amputation rates,and improved overall patient outcomes compared to standard treatment *** To compare the efficacy and safety of a comprehensive treatment protocol for DFUs with those of the standard treatment *** This retrospective study included 62 patients with DFUs,enrolled between January 2022 and January 2024,randomly assigned to the experimental(n=32)or control(n=30)*** experimental group received a comprehensive treatment comprising blood circulation improvement,debridement,vacuum sealing drainage,recombinant human epidermal growth factor and anti-inflammatory dressing,and skin *** control group received standard treatment,which included wound cleaning and dressing,antibiotics administration,and surgical debridement or amputation,if *** taken to reduce the white blood cell count,number of dressing changes,wound healing rate and time,and amputation rate were *** The experimental group exhibited significantly better outcomes than those of the control group in terms of the wound healing rate,wound healing time,and amputation ***,the comprehensive treatment protocol was safe and well tolerated by the *** Comprehensive treatment for DFUs is more effective than standard treatment,promoting granulation tissue growth,shortening hospitalization time,reducing pain and amputation rate,improving wound healing,and enhancing quality of life.

关键词： Diabetic foot ulcers Comprehensive treatment protocol Clinical study White blood cell count Wound healing Amputation rate

Synthesis and mesomorphic properties of new azine-type liquid crystals

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Chinese Chemical Letters 2007年第5期18卷 527-529页

作者： Qiang Wei Lin Shi Hui Cao Huai yang yan bin wang Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

A series of symmetrical azine-type liquid crystals were synthesized. The characteristic of these liquid crystals is that they had high clearing point （～320℃） and broad thermal range of nematic phase （～154℃）. I... 详细信息

关键词： Liquid crystal Symmetrical azine Synthesis Mesomorphic properties

Open-closed Loop ILC Corrected with Angle Relationship of Output Vectors for Tracking Control of Manipulator

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自动化学报 2010年第12期36卷 1758-1765页

作者： wang Hong-bin wang yan Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan UniversityQinhuangdao 066004P.R.China

In the research of iterative learning control(ILC),it is usually assumed that the initial states are consistent with the desired states or the initial states are fixed per *** considering the problem that ILC law is difficult to apply to the tracking control for the manipulator under the restriction of initial states,we change the dynamic model of the manipulator system into a lower-order system by reduced-order *** the transformed manipulator system,an open-closed loop ILC algorithm with angle correction term is proposed,which uses the error signal and the deviation of two adjacent error signals to adjust *** with traditional P-type algorithm,this algorithm makes better use of the saved and current information;while compared with PD-type algorithm,it overcomes the instability caused by the derivative ***,the angle relationship of output vectors is used as a standard to estimate the quality of the control inputs,"awarding or punishing" the changing trend of the ***,a fast convergence speed and excellent tracking effect are both *** strategies are proposed for the above algorithm when the limitation of each joint rotating angle is ***,the simulation results verify the effectiveness of the control scheme

关键词： ILC 自动化跟踪控制仿真

Effect of Al_(2)O_(3)fiber on twin intersections-induced dynamic recrystallization in fine-grained TiAl matrix composite

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Journal of Materials Science & Technology 2024年第5期172卷 1-14页

作者： Yaofeng Luo yan wang Li wang bin Liu Yong Liu State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

Dynamic recrystallization(DRX)is of great significance for the thermomechanical processing and microstructural regulation of TiAl ***,the underlying DRX mechanism remains poorly *** this study,an Avrami kinetics model for DRX was established,which was capable of predicting the DRX fraction *** addition,the effect of Al_(2)O_(3)short fiber on the DRX mechanisms of TiAl matrix composite during the isothermal compression was investigated for the first *** re-sults showed that other than inhibiting DRX by particles in the TiAl matrix composites,the addition of Al_(2)O_(3)short fiber accelerated a novel DRX process,which was induced by twinning and twin intersec-tions(TDRX).Thus,this composite exhibited a higher DRX rate than that of the as-cast TiAl monolithic *** origin of the twin intersection and TDRX for the composite was *** stress concentration near the Al_(2)O_(3)fiber was above the critical shear stress for twinning and thus was favorable for the formation of twinning and twin *** high stored strain energy at the regions of twins and twin intersections provided the driving force for *** accelerated the grain refinement in the TiAl matrix near the Al_(2)O_(3)*** present findings would provide a new perspective on DRX mechanisms,and provide the scientific guidance for optimizing the microstructures of TiAl matrix composites.

关键词： TiAl matrix composite Al_(2)O_(3)fiber Twin intersection Dynamic recrystallization

Influence of Annealing Treatments on Microstructure and Mechanical Properties of an Extruded Mg AZ31/Al 7050 Laminate

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Acta Metallurgica Sinica(English Letters) 2019年第2期32卷 227-234页

作者： yang Wu Yun-Chang Xin Xiang-Sheng Xia Bo Feng yan-bin wang Zu-De Zhao Southwest Technology and Engineering Research Institute International Joint Laboratory for Light Alloys College of Materials Science and Engineering Chongqing University Guangdong Institute of Materials and Processing Guangdong Academy of Sciences

Mg AZ31/A1 7050 laminate was fabricated by co-extrusion directly from the as-cast Mg AZ31 and Al 7050 billets. The influence of annealing temperature and annealing time on microstructure and mechanical behavior of the extruded Mg/Al laminate was systematically studied. Results show that annealing treatments at 250 ℃ for 3 h or at 350 ℃ for 3 h do not result in an obvious grain coarsening of Mg layer and cannot remove the heterogeneous structure. Annealing does not vary texture in the Mg layer, a large fraction of //ND and a small fraction of //TD, but the intensity of component //ND weakens to some extent. Lamellar microstructure in the A1 layer remains after annealing at250 ℃ for 3 h or at 350 ℃ for 3 h. High fractions of the texture components S and cube exist in the extruded sample, and annealing treatment hardly changes their fractions. Post-annealing treatment will largely reduce yield strength of extruded plate and increase plasticity slightly. The yield strength drops from 302 MPa to 206 MPa after annealing at 250 ℃ for 3 h and to 141 MPa after annealing at 350 ℃ for 3 h. The elongation to fracture increases from 1.5% to 5.4% after annealing at 250 ℃ for 3 h and to 4.8% at 350 ℃ for 3 h. The corresponding mechanism was discussed.

关键词： Laminate composite Annealing Microstructure Texture Mechanical property

Ratiometric and selective two-photon fluorescent probe based on PET-ICT for imaging Zn^(2+)in living cells and tissues

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Chinese Chemical Letters 2014年第1期25卷 93-98页

作者： Shang Wu Ya-Jun Wei yan-bin wang Qiong Su Lan Wu Hong Zhang Fen-Ping Yin Pei-Lin Yuan College of Chemical EngineeringNorthwest University for Nationalities

A two-photon fluorescent probe TPZn was developed for specific ratiometric imaging Zn2＋ in living cells and tissues. Significant ratiometric fluorescence change was based on photoinduced electron transfer and intramolecular charge transfer. The synthetic method of TPZn was simple. It was successfully used to selectively image Zn2＋ based on the higher binding affinity for Zn2＋ than for Cd2＋. TPZn was easily loaded into the living cell and tissues with high membrane permeability in a complex biological environment. TPZn could clearly visualize endogenous Zn2＋ by TP ratiometric imaging in hippocampal slices at a depth of 120 μm. Thus, TPZn is a useful tool to image of Zn2＋ in living cells and tissues without interference from Cd2＋.

关键词： Two-photon probe Ratiometric fluorescent imaging ZincLiving cell Living tissue

Digital single-operator cholangioscopy for biliary stricture after cadaveric liver transplantation

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World Journal of Gastrointestinal Oncology 2022年第5期14卷 1037-1049页

作者： Jian-Feng Yu Dong-Lei Zhang yan-bin wang Jian-Yu Hao Department of Gastroenterology Beijing Chao-Yang HospitalCapital Medical UniversityBeijing 100020China

BACKGROUND Biliary strictures after liver transplantation(LT)remain clinically arduous and challenging situations,and endoscopic retrograde cholangiopancreatography(ERCP)has been considered as the gold standard for the management of biliary strictures after ***,in the treatment of biliary strictures after LT with ERCP,many studies show that there is a large variation in diagnostic accuracy and therapeutic success *** single-operator peroral cholangioscopy(DSOC)is considered a valuable diagnostic modality for indeterminate biliary *** To evaluate DSOC in addition to ERCP for management of biliary strictures after *** Nineteen patients with duct-to-duct biliary reconstruction who underwent ERCP for suspected biliary complications between March 2019 and March 2020 at Beijing Chaoyang Hospital,Capital Medical University,were consecutively enrolled in this observational *** evaluating bile ducts using fluoroscopy,cholangioscopy using a modern digital single-operator cholangioscopy system(SpyGlass DS^(TM))was performed during the same procedure with patients under conscious *** patients received peri-interventional antibiotic *** strictures after LT were classified according to the manifestations of choledochoscopic strictures and the manifestations of transplanted hepatobiliary *** Twenty-one biliary strictures were found in a total of 19 patients,among which anastomotic strictures were evident in 18(94.7%)patients,while non-anastomotic strictures in 2(10.5%),and space-occupying lesions in 1(5.3%).Stones were found in 11(57.9%)and loose sutures in 8(42.1%).A benefit of cholangioscopy was seen in 15(78.9%)*** was crucial for selective guidewire placement prior to planned intervention in 4 *** was instrumental in identifying biliary stone and/or loose sutures in 9 patients in whom ERCP *** also provided a direct vision for laser lithotripsy.A spaceoccupying l

关键词： Cholangioscopy Endoscopic retrograde cholangiopancreatography Liver transplantation Biliary strictures Biliary complications Biliary anastomotic stricture

Effect of enalapril on plasma homocysteine levels in patients with essential hypertension

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第8期11卷 583-591页

作者： Fang-fang FAN Yong HUO Xu wang Xin XU bin-yan wang Xi-ping XU Jian-ping LI Department of Cardiology Peking University First Hospital Beijing 100034 China Institute of Biomedicine Anhui Medical University Hefei 230032 China

Objective:To investigate the effect of enalapril on plasma homocysteine(Hcy) levels and the association of methylenetetrahydrofolate reductase(MTHFR) C677T polymorphism with the changes of Hcy levels in response to enalapril among patients with essential ***:A total of 130 patients with mild-to-moderate essential hypertension were enrolled and enalapril was orally administered at a dose of 10 mg/d for eight *** Hcy levels were measured by denaturing high-performance liquid chromatography(DHPLC) at baseline and after eight weeks of *** of MTHFR C677T polymorphism was performed by TaqMan probe ***:Compared with baseline,plasma Hcy levels did not change significantly after eight weeks(P=0.81).Stratified by baseline Hcy levels,a significant increase in plasma Hcy levels(P=0.02) among those with Hcy <10 μmol/L was observed,in contrast to no significant changes in plasma Hcy levels(P=0.54) among those with Hcy ≥10 μmol/*** significant association was observed between MTHFR C677T polymorphism and changes in Hcy levels in response to ***:Enalapril may cause an increase in plasma Hcy levels among the hypertensives with low baseline Hcy *** was no significant association between MTHFR C677T genotypes and changes in Hcy levels in response to enalapril among subjects with essential hypertension.

关键词： Essential hypertension Methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism Enalapril Homocysteine

Self-starting all-fiber PM Er:laser mode locked by a biased nonlinear amplifying loop mirror

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Chinese Physics B 2019年第12期28卷 160-164页

作者： Ke Yin Yi-Ming Li yan-bin wang Xin Zheng Tian Jiang National Innovation Institute of Defense Technology Academy of Military Sciences PLA ChinaBeijing 100071China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China State Key Laboratory of High Performance Computing College of ComputerNational University of Defense TechnologyChangsha 410073China Luoyang Electronic Equipment Test Center of China Luoyang 471003China

A compact all-fiber polarization-maintaining Er:laser using a nonlinear amplifying loop mirror is reported. Fundamental single-pulse mode-locking operation can always self start, with a cavity round-trip decreased from ~ 4.7 m to~ 1.7 m. When the pulse repetition rate is 121.0328 MHz, output pulse is measured to have a center wavelength/3-d B spectral bandwidth/radio frequency signal to noise ratio(SNR)/pulse width of 1571.65 nm/18.70 nm/80 d B/477 fs, respectively. Besides, three states including the exponential growth, damping state, and steady state are investigated through the build-up process both experimentally and numerically. Excellent stability of this compact Er:laser is further evaluated,demonstrating that it can be an easy-fabrication maintenance-free ultrafast candidate for the scientific area of this kind.

关键词： ultrafast fiber laser single-mode polarization-maintaining Er:laser