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First light for the sodium laser guide star adaptive optics system on the Lijiang 1.8 m telescope

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Research in Astronomy and Astrophysics 2016年第12期16卷 41-45页

作者： Kai wei Min Li Shan-Qiu Chen Yong Bo Feng Chen jun-wei Zuo Qi Bian Ji Yao Lu-Chun Zhou Lin wei Dong-Hong Chen Yang Gao KaiJin Xiao-Lin Dai Han-Chu Fu Chang xu Zhi-Chao Wang Xiang-Hui xue xue-Wu Chen Xian-Mei Qian Yu Zhou Hao Xian Qin-jun Peng Chang-Hui Rao Zu-Yan xu Yu-Dong Zhang Key Laboratory on Adaptive Optics Chinese Academy of SciencesChengdu 610209China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China Research Center for Laser Physics and Technique Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of-Science and Technology of China Hefei 230036China Wuhan Institute of Physics and Mathematics Chinese Academy of SciencesWuhan 430071China Anhui Institute of Optics and Fine Mechanics Chinese Academy of SciencesHefei 230031China Yunnan Observatories Chinese Academy of SciencesKunming 650200China University of Chinese Academy of Sciences Beijing 100049China

A first generation sodium Laser Guide Star Adaptive Optics System （LGS-AOS） was developed and integrated into the Lijiang 1.8 m telescope in 2013. The LGS-AOS has three sub-systems：（1） a 20W long pulsed sodium laser, （2） a 300-millimeter-diameter laser launch telescope, and （3） a 37-element com- pact adaptive optics system. On 2014 January 25, we obtained high resolution images of an my 8.18 star, HIP 43963, during the first light of the LGS-AOS. In this paper, the sodium laser, the laser launch telescope, the compact adaptive optics system and the first light results will be presented.

关键词： instrumentation: adaptive optics -- turbulence -- atmospheric effects

Evaluation of sensory function and recovery after replantation of fingertips at ZoneⅠin children

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Neural Regeneration Research 2017年第11期12卷 1911-1917页

作者： Zhao-wei Zhu Xiao-yan Zou Yong-jun Huang Jiang-hui Liu Xi-jun Huang Bo He Zeng-tao Wang Department of Plastic Surgery the First Affiliated Hospital of Sun Yat-sen University Guangzhou Guangdong ProvinceChina Department of Orthopedics and Microsurgery the First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Neurology the First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Orthopedics Guangdong Second Provincial General HospitalGuangzhouGuangdong ProvinceChina Department of Emergency the First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Hand and Foot Surgery Provincial Hospital Affiliated to Shandong UniversitylinanShandong ProvinceChina

Sensory function is the most significant criterion when evaluating the prognosis of replanted fingers. Current clinical research has focused on surgical techniques and indications for finger replantation; however, few studies have focused on recovery of finger sensory function af- ter replantation. This study retrospectively assessed data of eight patients who had undergone nine Zone I replantations of the fingertips in the First Affiliated Hospital of Sun Yat-sen University of China from July 2014 to January 2016. Variations in the extent of damage, with the residual vessels or nerves in some fingers being too short or even missing, prevented tension-free suture repair in some patients. Thus, re- pair of four of the nine fingertips included arteriovenous anastomosis, the remaining five undergoing arterial anastomosis during replanta- tion of the amputated fingers. Three patients underwent nerve repair, whereas the remaining six cases did not. Fingertip replantations were successful in all eight patients. Compared with the patients without vascular anastomosis, no obvious atrophy was visible in the fingertips of patients who did undergo vascular anastomosis during replantation and their sensory function did recover. Fingertip replantation pro- vides good sensory function and cosmetic outcomes when good artery and vein anastomoses have been created, even when digital nerves have not been repaired.

关键词： nerve regeneration fingertip replantation neurological function microsurgery hand surgery anatomy plastic surgery blood vessels neural regeneration

Data Bucket-Based Fragment Management for Solid State Drive Storage System

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Journal of Electronic Science and Technology 2020年第4期18卷 330-340页

作者： wei Jiang jun-Long Wang Jin-Yu Zhan Jing-Huan Yu Hai-Bo Hu School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengdu 610054 Computer Science Department City University of Hong KongHong Kong 999077

The current storage mechanism considered little in data’s keeping *** can produce fragments of various sizes among data *** some cases,these fragments may be serious and harm system *** this paper,we manage to modify the current storage *** introduce an extra storage unit called data bucket into the classical data manage ***,we modify the data manage mechanism to improve our *** keeping data according to their visited information,both the number of fragments and the fragment size are greatly *** different data features and storage device conditions,we also improve the solid state drive(SSD)lifetime by keeping data into different *** show that our designs have a positive influence on the SSD storage density and actual service time.

关键词： Data structure erasing time fragment solid state driver(SSD)

Global Exact Boundary Controllability for Cubic Semi-linear Wave Equations and Klein-Gordon Equations

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Chinese Annals of Mathematics,Series B 2010年第1期31卷 35-58页

作者： Yi ZHOU wei xu Zhen LEI Key Laboratory of Mathematics for Nonlinear Sciences School of Mathematical Sciences Fudan University Shanghai 200433 China School of Mathematical Sciences Fudan University Shanghai 200433 China

The authors prove the global exact boundary controllability for the cubic semilinear wave equation in three space dimensions,subject to Dirichlet,Neumann,or any other kind of boundary controls which result in the well-posedness of the corresponding initial-boundary value *** exponential decay of energy is first established for the cubic semi-linear wave equation with some boundary condition by the multiplier method,which reduces the global exact boundary controllability problem to a local *** proof is carried out in line with [2,15].Then a constructive method that has been developed in [13] is used to study the local *** when the region is star-complemented,it is obtained that the control function only need to be applied on a relatively open subset of the *** the cubic Klein-Gordon equation,similar results of the global exact boundary controllability are proved by such an idea.

关键词： Global exact boundary controllability Cubic semi-linear wave equations The exponential decay Star-shaped Star-complemented Cubic Klein- Gordon equations

Cloud and precipitation interference by strong low-frequency sound wave

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Science China(Technological Sciences) 2021年第2期64卷 261-272页

作者： JiaHua wei jun QIU TieJian LI YueFei HUANG Zhen QIAO Jionwei CAO DeYu ZHONG GuangQian WANG State Key Laboratory of Plateau Ecology and Agriculture Qinghai UniversityXining 810016China State Key Laboratory of Hydro-science and Engineering Tsinghua UniversityBeijing 100084China School of Hydraulic and Electric Engineering Qinghai UniversityXining 810016China

Acoustic interference of atmosphere has been an attractive research area because of its potential effect on environment,water resources,ecology,agriculture,and other ***,it is also a controversial topic because of the difficulty of quantitative assessment and high operating *** this study,a novel acoustic interference technology is proposed that uses strong lowfrequency sound *** is no chemical pollution or dependence on airborne vehicles,and it can be remotely controlled at low cost.A complete equipment system for acoustic atmospheric interference technology is established,based on which a series of experimental studies on cloud and precipitation response under acoustic action are performed,mainly including the radar echo intensity,cloud microphysical characteristics and the spatial distribution of ground rainfall *** trigger and periodic effect of the acoustic waves on the cloud are proposed to be the key responses of acoustic atmospheric *** study is important to further research on atmosphere interference technology based on low frequency strong sound waves.

关键词： acoustic interference of atmosphere low-frequency sound waves air water resources exploration cloud microphysical characteristics precipitation intensity

WirelessLLM:Empowering Large Language Models Towards Wireless Intelligence

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Journal of Communications and Information Networks 2024年第2期9卷 99-112页

作者： Jiawei Shao Jingwen Tong Qiong Wu wei Guo Zijian Li Zehong Lin jun Zhang Department of Electronic and Computer Engineering The Hong Kong University of Science and TechnologyHong Kong 999077China

The rapid evolution of wireless technologies and the growing complexity of network infrastructures necessitate a paradigm shift in how communication networks are designed,configured,and managed. Recent advancements in large language models (LLMs) have sparked interest in their potential to revolutionize wireless communication systems. However, existing studies on LLMs for wireless systems are limited to a direct application for telecom language understanding. To empower LLMs with knowledge and expertise in the wireless domain, this paper proposes WirelessLLM, a comprehensive framework for adapting and enhancing LLMs to address the unique challenges and requirements of wireless communication networks. We first identify three foundational principles that underpin WirelessLLM:knowledge alignment, knowledge fusion, and knowledge evolution. Then,we investigate the enabling technologies to build WirelessLLM, including prompt engineering, retrieval augmented generation, tool usage, multi-modal pre-training, and domain-specific fine-tuning. Moreover, we present three case studies to demonstrate the practical applicability and benefits of WirelessLLM for solving typical problems in wireless networks. Finally, we conclude this paper by highlighting key challenges and outlining potential avenues for future research.

关键词： large language models multi-modal models wireless communications power allocation spectrum sensing protocol understanding

Investigation and optimization of high-valent Ta-doped SrFeO_(3-δ)as air electrode for intermediate-temperature solid oxide fuel cells

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International Journal of Minerals,Metallurgy and Materials 2024年第9期31卷 2102-2109页

作者： Shanshan Jiang Hao Qiu Shaohua xu Xiaomin xu Jingjing Jiang Beibei Xiao Paulo Sérgio Barros Juliao) Chao Su Daifen Chen wei Zhou School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212100China WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerth WA6102Australia Institute of Analysis and Testing Beijing Academy of Science and TechnologyBeijing 100089China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

To explore highly active and thermomechanical stable air electrodes for intermediate-temperature solid oxide fuel cells(ITSOFCs),10mol%Ta5+doped in the B site of strontium ferrite perovskite oxide(SrTa_(0.1)Fe_(0.9)O_(3-δ),STF)is investigated and *** effects of Ta^(5+)doping on structure,transition metal reduction,oxygen nonstoichiometry,thermal expansion,and electrical performance are evaluated *** 10mol%Ta^(5+)doping,the thermal expansion coefficient(TEC)decreased from 34.1×10^(-6)(SrFeO_(3-δ))to 14.6×10^(-6) K^(-1)(STF),which is near the TEC of electrolyte(13.3×10^(-6) K^(-1) for Sm_(0.2)Ce_(0.8)O_(1.9),SDC),indicates excellent thermomechanical *** 550-750℃,STF shows superior oxygen vacancy concentrations(0.262 to 0.331),which is critical in the oxygen-reduction reaction(ORR).Oxygen temperature-programmed desorption(O_(2)-TPD)indicated the thermal reduction onset temperature of iron ion is around 420℃,which matched well with the inflection points on the thermos-gravimetric analysis and electrical conductivity *** 600℃,the STF electrode shows area-specific resistance(ASR)of 0.152Ω·cm^(2) and peak power density(PPD)of 749 mW·cm^(-2).ORR activity of STF was further improved by introducing 30wt%Sm_(0.2)Ce_(0.8)O_(1.9)(SDC)powder,STF+SDC composite cathode achieving outstanding ASR value of 0.115Ω·cm2 at 600℃,even comparable with benchmark cobalt-containing cathode,Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O_(3-δ)(BSCF).Distribution of relaxation time(DRT)analysis revealed that the oxygen surface exchange and bulk diffusion were improved by forming a composite *** 650℃,STF+SDC composite cathode achieving an outstanding PPD of 1117 mW·cm^(-2).The excellent results suggest that STF and STF+SDC are promising air electrodes for IT-SOFCs.

关键词： strontium ferrite-based perovskite Ta doping composite cathode intermediate-temperature solid oxide fuel cells

Heterogeneous kinetics of the OH-initiated degradation of fenthion and parathion

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Journal of Environmental Sciences 2023年第11期133卷 161-170页

作者： Yuanhong Shang Yongchun Liu Jinfeng Tian Changgeng Liu xuejun Zhu jun Wang Dandan Chen wei Tao School of Biological and Chemical Engineering Panzhihua UniversityPanzhihua 617000China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Medical College Panzhihua UniversityPanzhihua 617000China Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education Sichuan University of Science&EngineeringZigong 643000China

Fenthion and parathion are two representative kinds of organophosphorus pesticides and widely used in *** are directly or indirectly released into the atmosphere by spraying or volatilization ***,their heterogeneous reactivity toward OH radicals has not yet been well ***,this work investigated the heterogeneous kinetics of the OH-initiated degradation of surface-bound fenthion and parathion using a flow *** results showed that OH radicals played an important role in the atmospheric degradation of fenthion and *** average rate constants were(7.20±0.77)×10^(-12) and(10.40±0.60)×10^(−12) cm^(3)/(mol·sec)at a relative humidity(RH)and temperature of 35% and 20℃,respectively,suggesting that they have relatively short lifetimes in the *** addition,a negative RH dependence and a positive temperature dependence of the rate constants were *** Arrhenius expressions of fenthion and parathion were k_(2)=(1.34±0.48)×10^(-9) exp[-(1432.59±105.29)/T]and k_(2)=(1.96±1.38)×10^(-9) exp[-(1619.98±222.02)/T],respectively,and their overall activation energy was estimated to be(11.88±0.87)and(13.48±1.83)kJ/*** experimental results will update the kinetic data of fenthion and parathion in the atmosphere and be helpful to further understand their atmospheric transportation processes.

关键词： Organophosphorus pesticide Heterogeneous kinetics Fenthion Parathion OH radicals

Boundary effect of toppling failure based on three-dimensional mechanical model

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Journal of Mountain Science 2022年第11期19卷 3314-3322页

作者： CAI jun-chao ZHENG Da JU Neng-pan HUANG Run-qiu ZHAO wei-hua School of Civil Engineering Henan University of Science and TechnologyLuoyang 471023China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China College of Environment and Civil Engineering Chengdu University of TechnologyChengdu 610059China

Previous researches on the mechanical model of toppling failure mainly concentrated on twodimensional mechanical model(TwDM) analysis. The TwDM analysis assumes the width of the slab beam is unit width without considering the lateral constraint force. The assumed conditions are obviously different from the site conditions, thus there is a certain difference between the calculated results and the field work. A three-dimensional mechanical model(ThDM)of toppling failure was established, considering that the slab beam was mainly subject to self-weight, the frictional resistance of interlayer and lateral constraint force. Due to the progressive characteristics of toppling failure, the concept and the formula of the first fracture depth(FFD) of toppling was raised and constructed. The case study indicates that the ThDM is more effective and can be accurately used to calculate the toppling fracture depth of the slab beam. The FFD decreases proportionally with the increase of slab beam width. FFD grows fast when the slab beam width is less than 2.0 m and it tends to be stable when the slab beam width is above 2.0 m. The FFD decreases with the increase of the lateral constraint coefficient, indicating that the boundary condition of the free space is positively correlated with the stability and depth of toppling. This is a good explanation of the free space effect. This study provides a reference for the stability evaluation and prevention-control design of toppling slope in the future.

关键词： Boundary effect Toppling failure Three-dimensional mechanical model(ThDM) First fracture depth(FFD) Free face Slope failure