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Large-aperture Telescope Tracking Control Based on Time-synchronization Strategy

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Research in Astronomy and Astrophysics 2024年第3期24卷 34-46页

作者： yun Li Yu Ye Shi-Hai Yang Ling-Zhe Xu Jin Xu Hai Wang Zhuang-Zhuang Deng Rui-Qiang Liu xiao-Jie Gu Bo-Zhong Gu Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing 210042China CAS Key Laboratory of Astronomical Optics&Technology Nanjing Institute of Astronomical Optics&TechnologyNanjing 210042China University of Chinese Academy of Sciences Beijing 100049China

A time-synchronization strategy for packetized transmission of target position about a large-aperture telescope observation control system has been proposed in this *** with the existing telescope tracking strategy,the target position packing and sending strategy based on the time synchronization method proposed in this paper has the advantages of high stability and ***,the telescope tracking observation control method was elaborated in this paper,including the motion pattern during telescope ***,the strategy for packetizes transmission of target positions based on time-synchronization is established and lists the detailed ***,the performance of the tracking strategy is verified using the 2.5 m telescope for the simulated uniform speed star and the blind-tracking fixed star HIP 312.6,*** test results show that the accuracy root mean square of the tracking strategy proposed in this paper is less than 0".02.at 30 minutes,and the performance is much better than the design requirement of 0".*** most important advantage of this tracking strategy is that the telescope can guarantee normal tracking for a certain period of time even if the hardware or software of the host computer is abnormal.

关键词： miscellaneous-telescopes-methods observational-methods analytical

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Influence of Boundary Layer Mixing Mechanisms on the Simulation of Typhoon Wutip:A Direct Hit on the Xisha Islands in 2.13

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Journal of Tropical Meteorology 2024年第3期30卷 211-222页

作者： GUO Tian-yun LI Jiang-nan PANG Si-min MA xiao-ling School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster StudiesSun Yat-sen UniversityZhuhaiGuangdong 519082 China Hunan Meteorological Service Center Changsha 410118 China Guangxi Meteorological Disaster Prevention Center Nanning 530022 China Hunan Key Laboratory of Meteorological Disaster Prevention and Mitigation Changsha 410118 China

In this study,we simulated the tropical cyclone(TC)Wutip,which originated in the South China Sea in 2.13,using three planetary boundary layer(PBL)parameterized schemes within the Weather Research and Forecasting model,i.e.,Medium-Range Forecast(MRF),Yonsei University scheme(YSU),and Asymmetric Convective Model Version 2.ACM2.,with different vertical mixing *** investigated the effects of different PBL mixing mechanisms on the simulation of TC track,intensity,structure,and *** results reveal that the surface flux and vertical mixing of PBL jointly influenced the TC throughout its lifecycle,and the simulated TC intensity was closely correlated with the eyewall *** three schemes were all first-order and nonlocal closure ***,the MRF scheme was over-mixed,which led to a relatively dryer and warmer near-surface layer,a wetter and colder upper PBL,and thus a simulated eyewall with the smallest wet static energy and weaker ***,the MRF scheme produced the smallest 10-m wind speed,which was closest to the observation,and the weakest TC warm-core structure and *** YSU scheme was similar to the MRF scheme,yet it distinguished itself by incorporating an explicit treatment of the entrainment process at the top of the PBL and developing thermal-free convection above the PBL of the eyewall,which significantly increased the wet static energy over the TC ***,the simulated eyewall was more contracted and steeper with stronger upward motion while the eye area became even warmer,finally leading to the strongest *** precipitation distribution simulated by the YSU scheme was the most consistent with the *** ACM2.scheme used the nonlocal upward and local downward mixed asymmetric convection modes,which reduced the excessive de-velopment of thermal-free convection at the eyewall,and avoided restricting the dynamically forced turbulent motion outside the eyewall,leading to a larger radius of the

关键词： tropical cyclone PBL scheme mixing mechanism WRF

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Different concentrations of hyaluronic acid eye drops for dry eye syndrome: a systematic review and Meta-analysis

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International Journal of Ophthalmology(English edition) 2024年第6期17卷 1110-1119页

作者： xiao-Wei Ouyang Sheng Fang yun-Min Yi Shi-Peng Zou Qi-Yu Hu Zi-Xuan Huang Qing-Xia Li Jin-Yan Luo Department of Ophthalmology Nanchang Hongdu Hospital of Traditional Chinese MedicineNanchang 330000Jiangxi ProvinceChina Department of Ophthalmology Jiangxi Hospital of Integrated Traditional Chinese and Western MedicineNanchang 330000Jiangxi ProvinceChina Department of Cataract Nanchang University Affiliated Eye HospitalNanchang 330000Jiangxi ProvinceChina Department of Neuro-ophthalmology Nanchang University Affiliated Eye HospitalNanchang 330000Jiangxi ProvinceChina

AIM:To compare high or low concentration of hyaluronic acid eye drops(HY)for dry eye syndromes(DES).METHODS:Randomized controlled trials(RCTs)comparing various concentrations of HY were searched in PubMed,Embase,Web of Science,Cochrane,SinoMed,CNKI,Wanfang Database,CQVIP,and Chinese journals databases between inception and July *** standardized mean differences(SMD)or weighted mean difference(WMD)with 95%confidence intervals(CI)from RCTs evaluating Schirmer’s I test(SIT),corneal fluorescein staining score(CFS),tear breakup time(TBUT),DES score(DESS),and Ocular Surface Disease Index(OSDI)were *** analysis,Egger’s test and Meta-regression analysis were performed for all ***:We conducted a Meta-analysis of 10 RCTs that met the inclusion criteria,involving 1796 ***-concentrations group significantly improved the outcome of CFS according to random effects modelling(SMD,-3.37;95%CI,-5.2. to-1.48;P=0.0005).The rest of the results were not statistically significant,including indicators such as SIT,TBUT,DESS and ***:For dry eyes with positive corneal staining,a high concentration of HY is recommended,whereas in other cases,a high concentration of HY does not offer a more pronounced advantage over a low concentration of HY in the treatment of dry eyes.

关键词： dry eye hyaluronic acid concentration Meta-analysis

Frequency and associated factors of accommodation and non-strabismic binocular vision dysfunction among medical university students

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International Journal of Ophthalmology(English edition) 2024年第2期17卷 374-379页

作者： Jie Cai Wen-Wen Fan yun-Hui Zhong Cai-Lan Wen xiao-Dan Wei Wan-Chen Wei Wan-Yan Xiang Jin-Mao Chen Department of Ophthalmology First Affiliated Hospital of Guangxi Medical UniversityNanning 530021Guangxi Zhuang Autonomous RegionChina Digital and Intelligent Technology Transformation and Application Research Institute of Visual Function Tianjin 300000China Guangxi Medical University Nanning 530021Guangxi Zhuang Autonomous RegionChina

AIM:To investigate the frequency and associated factors of accommodation and non-strabismic binocular vision dysfunction among medical university ***:Totally 158 student volunteers underwent routine vision examination in the optometry clinic of Guangxi Medical *** data were used to identify the different types of accommodation and nonstrabismic binocular vision dysfunction and to determine their *** analysis and logistic regression were used to examine the factors associated with these ***:The results showed that 36.71%of the subjects had accommodation and non-strabismic binocular vision issues,with 8.86%being attributed to accommodation dysfunction and 2..85%to binocular *** insufficiency(CI)was the most common abnormality,accounting for 13.2.%.Those with these abnormalities experienced higher levels of eyestrain(χ2.69.518,P2.1,P=0.004)and the asthenopia survey scale(ASS)score(r=0.346,P2.,P2.4,P2.4,P=0.003),and the set of negative fusion images at far range(r=-0.2.7,P=0.003).Logistic regression analysis indicated that gender,age,and the difference in right and binocular SE did not influence the emergence of these ***:Binocular vision abnormalities are more prevalent than accommodation dysfunction,with CI being the most frequent *** binocular refractive disparity leads to more severe eyestrain symptoms.

关键词： optometry clinic non-strabismic binocular vision dysfunction college students convergence insufficiency

Medcheck:A novel software for automated de-formulation of traditional Chinese medicine(TCM)prescriptions by liquid chromatography-mass spectrometry

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Journal of Pharmaceutical Analysis 2024年第6期14卷 930-932页

作者： xiao-lan Li Jian-qing Zhang yun Li Xuan-jing Shen Huan-ya Yang Lin Yang Meng Xu Qi-rui Bi Chang-liang Yao De-an Guo Shanghai Research Center for Modernization of Traditional Chinese Medicine National Engineering Research Center of TCM Standardization TechnologyShanghai Institute of Materia MedicaChinese Academy of SciencesShanghai201203China b University of Chinese Academy of Sciences Beijing100049China

Prescriptions are the main clinical application of traditional Chinese medicines(TCMs).Common forms include Chinese patent medicines,Kampo formulas,and hospital decoctions.A new pre-scription called“famous classical formulas”is recently developed and expected to boom in the *** constituent me-dicinal plants in prescriptions is critical for new drug development and quality control[1],which could avoid safety issues from adulteration or substandard ingredients,as seen in the notorious Longdan Xiegan Pill event.

关键词： medicines formulation prescription

Ni-Cr合金在富CO_(2.气氛中的高温腐蚀研究进展

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金属学报 2024年第6期60卷 731-742页

作者：谢云 Jianqiang Zhang 彭晓南昌航空大学材料科学与工程学院南昌330063 School of Materials Science and Engineering University of New South WalesSydney 2052Australia

发展富氧燃烧技术和提高锅炉的蒸汽参数可以有效减少燃煤电厂的CO_(2.排放,有助于火力发电行业实现“碳达峰-碳中和”的目标,但采用上述技术对锅炉材料的抗CO_(2.高温腐蚀性能和高温蠕变强度提出了更高要求,镍基合金有望成为优选材料。... 详细信息

发展富氧燃烧技术和提高锅炉的蒸汽参数可以有效减少燃煤电厂的CO_(2.排放,有助于火力发电行业实现“碳达峰-碳中和”的目标,但采用上述技术对锅炉材料的抗CO_(2.高温腐蚀性能和高温蠕变强度提出了更高要求,镍基合金有望成为优选材料。针对先进超超临界发电机组富氧燃烧烟气高含CO_(2.的特点,本文综述了目前关于Ni-Cr合金在富CO_(2.气氛中的高温腐蚀研究成果,重点介绍了CO_(2.气氛对Ni-Cr合金热生长Cr_(2.O_(3)保护膜的影响,阐明了Ni-Cr合金在CO_(2.气氛中发生碳化的机理,总结了富CO_(2.气氛中的H_(2.O(g)、SO_(2.、环境温度和合金元素对Ni-Cr合金抗高温腐蚀性能的影响,进而提出未来关于Ni-Cr合金在富CO_(2.气氛中的高温腐蚀需深入研究的问题,包括:解析Ni-Cr合金在不同气氛中热生长Cr_(2.O_(3)膜的微观精细结构,探明CO_(2.、H_(2.O(g)和SO_(2.与稀土元素在氧化膜晶界处的交互作用,关注富CO_(2.气氛中的HCl(g)组分对Ni-Cr合金形成Cr_(2.O_(3)保护膜的影响。

关键词： Ni-Cr合金富CO_(2.气氛高温腐蚀

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Bifunctional electrolyte addition for longer life and higher capacity of aqueous zinc-ion hybrid supercapacitors

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Rare Metals 2024年第10期43卷 5060-5069页

作者： Fan Zhang Si-Qi Li Li-Nan Xia Chao Yang Lei Li Kai-Ming Wang Chen-Liang Xu Yuan-Yuan Feng Bin Zhao Fei Shen xiao-Gang Han Ling-yun Zhu School of Electric Power Civil Engineering and ArchitectureShanxi University State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi’an Jiaotong University Department of Science Materials and Engineering National University of Singapore School of Materials Science and Engineering Anhui University

Owing to uncontrolled and uneven electrodeposition and side reactions,Zn metal anodes inevitably suffer from issues such as dendrite growth,hydrogen evolution reactions,and surface *** paper proposes an efficient strategy to address these critical issues for realizing long-life and high-capacity aqueous zinc-ion hybrid supercapacitors （ZHSCs） by incorporating low-concentration (0.05 mol·L-1) redox RbI electrolyte ***,rubidium cations have the ability to influence the negative Zn electrode surface via an electrostatic shielding mechanism,effectively protecting the electrode and minimizing undesired side *** an aqueous solution,iodide anions actively solvate Zn2.ions by stabilizing and modulating the solvation shell surrounding Zn2..Moreover,the presence of iodide ions promotes the uniform deposition of Zn2.species by selective adsorption onto the electrode *** synergistic effect of the electrostatic shielding and halogen ions enables the realization of aqueous symmetric Zn||Zn cells with a substantial cycle life of more than 2.00 h Additionally,when applied to commercial activated carbon（AC）,the proposed strategy facilitates the development of aqueous ZHSCs,exhibiting high specific capacitances(148.8 F·g-1at 4 A·g-1) and ultra-long cycling stability.

关键词： Aqueous zinc-ion hybrid supercapacitor Rubidium iodide Synergistic effects of anions and cations Zn dendrite Zn metal anode

Global research landscape of Peutz-Jeghers syndrome and successful endoscopic management of intestinal intussusception in patients with recurrent laparotomies

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2702-2718页

作者： Qi Sun xiao-Ying Wang Guang-Jin Guo Lei Wang Li-Min Meng yun-Fei Guo Tao Sun Shou-Bin Ning Department of Gastroenterology Air Force Medical CenterBeijing 100142China College of Life Science Northwest UniversityXi'an 710069Shaanxi ProvinceChina Clinical Medical Laboratory Air Force Medical CenterBeijing 100142China Department of Medical Imaging Air Force Medical CenterBeijing 100142China Department of Pathology Air Force Medical CenterBeijing 100142China

BACKGROUND Peutz-Jeghers syndrome(PJS)has brought significant physical,psychological and economic burdens on the patients and their families due to its early onset,diagnostic and therapeutic challenges and increased recurrence *** To explore the current research status and emerging hotspots of *** Studies on PJS published during 1994-2.2. were gathered based on Web of Science Core ***,a case of PJS-induced intestinal intussusception,successfully treated with endoscopic methods despite three laparotomies,was *** bibliometric and visual analysis were conducted with VOSviewer,R and *** Altogether 1760 studies were identified,indicating a steady increase in the publication *** United States had the highest influence,whereas the University of Helsinki emerged as the leading institution,and Aaltonen LA from the University of Helsinki was the most prolific *** Research,Oncogene and Endoscopy were the top three journals based on *** burst direction analysis revealed that"cancer risk","management","surveillance"and"familial pancreatic cancer"were the potential hotspots for ***,"early detection","capsule endoscopy","clinical management","double-balloon endoscopy","familial pancreatic cancer"and"molecular genetic basis"were identified as the key clusters of co-cited *** polypectomy remained effective on resolving intestinal intussusception in patients who underwent three previous *** In the last three decades,global publications related to PJS show a steadily increasing trend in *** management is currently a research hotspot.

关键词： Peutz-Jeghers syndrome Endoscopy Management Cancer Microbiota Bibliometric

Tuberous sclerosis complex combined with primary lymphedema:A case report

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World Journal of Clinical Cases 2024年第15期12卷 2642-2648页

作者： Xing-Peng Li xiao-Li Sun Xin Liu Zhe Wen Li-Hua Jiang Yan Fu yun-Long Yue Ren-Gui Wang Department of Radiology Beijing Shijitan Hospital Affiliated to Capital Medical UniversityBeijing 100038China Department of Lymph Surgery Beijing Shijitan Hospital Affiliated to Capital Medical UniversityBeijing 100038China Department of Nuclear Medicine Beijing Shijitan Hospital Affiliated to Capital Medical UniversityBeijing 100038China Department of MRI Beijing Shijitan Hospital Affiliated to Capital Medical UniversityBeijing 100038China

BACKGROUND Tuberous sclerosis complex(TSC)and primary lymphedema(PLE)are both rare diseases,and it is even rarer for both to occur in the same *** this work,we have provided a detailed description of a patient's clinical presentation,imaging findings,and *** a retrospective analysis was conducted on 14 published relevant case *** SUMMARY A 16-year-old male came to our hospital for treatment due to right lower limb *** swelling is already present from *** patient’s memory had been progressively *** had occurred 1 year prior at an unknown *** patient was diagnosed with TSC combined with PLE through multimodal imaging examination:Computed tomography,magnetic resonance imaging,and *** patient underwent *** swelling of the patient's right lower limb significantly improved after *** did not *** taking antiepileptic drugs and *** TSC with PLE is a rare and systemic *** can detect lesions of this disease,which are important for diagnosis and treatment.

关键词： Tuberous sclerosis complex Lymphedema Sirolimus Multimodal imaging examination Case report