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All-sky Guide Star Catalog for CSST

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Research in Astronomy and Astrophysics 2024年第4期24卷 35-59页

作者： Hui-Mei Feng Zi-Huang Cao Man I lam Ran Li Hao Tian Da-Yi Yin Yuan-Yu Yang Xin Zhang Dong-Wei Fan Yi-Qiao Dong Xin-Feng Li Wei Wang Long Li Hugh RAJones Yi-Han Tao Jia-Lu Nie Pei-Pei Wang Mao-Yuan Liu He-jun Yang Chao Liu Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of ChineseAcademy of Sciences Beijing 100049China Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai200083China Technology and Engineering Center for Space Utilization.Chinese Academy of Sciences Beijing 100094China Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Centre for Astrophysics University of HertfordshireHatfieldUK Beijing University of Technology Beijing 100124China

The China Space Station Telescope(CSST)is a two-meter space telescope with multiple back-end *** Fine Guidance Sensor(FGS)is an essential subsystem of the CSST Precision Image Stability System to ensure the required absolute pointing accuracy and line-of-sight *** this study,we construct the Main Guide Star Catalog for *** accomplish this,we utilize the information about the FGS and object information from the Gaia Data Release *** provide an FGS instrument magnitude and exclude variables,binaries,and high proper motion stars from the catalog to ensure uniform FGS guidance ***,we generate a HEALPix index,which provides a hierarchical tessellation of the celestial sphere,and employ the Voronoi algorithm to achieve a homogeneous distribution of stars across the *** distribution ensures adequate coverage and sampling of the *** performance of the CSST guide star catalog was assessed by simulating the field of view of the FGS according to the CSST mock survey strategy *** analysis of the results indicates that this catalog provides adequate coverage and *** catalog's performance meets the FGS requirements,ensuring the functioning of the FGS and its guidance capabilities.

关键词： catalogs astrometry instrumentation:detectors

An AI-empowered indoor digital contact tracing system for COVID-19 outbreaks in residential care homes

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Infectious Disease Modelling 2024年第2期9卷 474-482页

作者： Jiahui Meng Justina Yat Wa Liu Lin Yang Man Sing Wong Hilda Tsang Boyu Yu Jincheng Yu Freddy Man-Hin lam Daihai He Lei Yang Yan Li Gilman Kit-Hang Siu Stefanos Tyrovolas Yao Jie Xie David Man David H.K.Shum School of Nursing The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Electronic and Information Engineering The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Research Centre of Textiles for Future Fashion The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Applied Mathematics The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina The Jockey Club School of Public Health and Primary Care The Chinese University of Hong KongHong Kong Special Administrative RegionChina Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Computing The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Health Technology and Informatics The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina Department of Nutrition and Food Studies George Mason UniversityUSA Tung Wah College Hong Kong Special Administrative RegionChina Mental Health Research Centre The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina

An AI-empowered indoor digital contact-tracing system was developed using a centralized architecture and advanced low-energy Bluetooth technologies for indoor positioning,with careful preservation of privacy and data *** analyzed the contact pattern data from two RCHs and investigated a COVID-19 outbreak in one study *** evaluate the effectiveness of the system in containing outbreaks with minimal contacts under quarantine,a simulation study was conducted to compare the impact of different quarantine strategies on outbreak containment within *** significant difference in contact hours between weekdays and weekends was observed for some pairs of RCH residents and staff during the two-week data collection *** significant difference between secondary cases and uninfected contacts was observed in a COVID-19 outbreak in terms of their demographics and contact *** results based on the collected contact data indicated that a threshold of accumulative contact hours one or two days prior to diagnosis of the index case could dramatically increase the efficiency of outbreak containment within RCHs by targeted isolation of the close *** study demonstrated the feasibility and efficiency of employing an AI-empowered system in indoor digital contact tracing of outbreaks in RCHs in the post-pandemic era.

关键词： COVID-19 Indoor contact tracing Contact pattern Outbreak containment Artificial intelligence

Carvedilol Versus Other Nonselective Beta Blockers for Variceal Bleeding Prophylaxis and Death: A Network Meta-analysis

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Journal of Clinical and Translational Hepatology 2023年第5期11卷 1143-1149页

作者： ka-Shing Cheung Chiu-Hang Mok Lok-ka lam Xian-Hua Mao Lung-Yi Mak Wai-kay Seto Man-Fung Yuen Department of Medicine School of Clinical MedicineThe University of Hong KongQueen Mary HospitalHong KongChina Department of Medicine The University of Hong Kong-Shenzhen HospitalShenzhenGuangdongChina School of Clinical Medicine The University of Hong KongHong KongChina State Key Laboratory of Liver Research The University of Hong KongHong KongChina

Background and Aims:We aimed to perform a network meta-analysis(NWM)to examine comparative effectiveness of non-selective beta blockers(NSBBs)on prophylaxis of gastroesophageal variceal bleeding(GVB)and mortality ***:MEDLINE(OVID)and EMBASE databases were searched for eligible randomized clinical trials(RCTs)from inception to July 3,*** of interest included primary/secondary prophylaxis of GVB,failure to achieve hepatic venous pressure gradient(HVPG)decremental response,liver-related and all-cause mortality.A Bayesian NWM was performed to derive relative risk(RR)with 95%credible intervals(CrIs).The ranking probability of each NSBB was assessed by surface under cumulative ranking curve(SUCRA).Results:Thirty-three RCTs including 3,188 cirrhosis patients with gastroesophageal varices were *** with placebo,nadolol ranked first for reducing variceal bleeding[RR:0.25,(95%CrI:0.11–0.51);SUCRA:0.898],followed by carvedilol[RR:0.33,(95%CrI:0.11–0.88);SUCRA:0.692]and propranolol[RR:0.52,(95%CrI:0.37–0.75);SUCRA:0.405].Carvedilol was more effective than propranolol in achieving HVPG decremental response[RR:0.43,(95%CrI:0.26–0.69)].Carvedilol ranked first for reducing all-cause mortality[RR:0.32,(95%CrI:0.17–0.57);SUCRA:0.963],followed by nadolol[RR:0.48,(95%CI:0.29–0.77);SUCRA:0.688],and propranolol[RR:0.77,(95%CI:0.58–1.02);SUCRA:0.337].Similar findings were observed for liver-related *** ranked the *** RR of adverse events was 4.38,(95%CrI:0.33–161.4);SUCRA:0.530,followed by propranolol[RR:7.54,(95%CrI:1.90–47.89);SUCRA:0.360],and nadolol[RR:18.24,(95%CrI:91.51–390.90);SUCRA:0.158].Conclusions:Carvedilol is the preferred NSBB with better survival benefit and lower occurrence of adverse events among patients with gastroesophageal varices.

关键词： NSBB Carvedilol Nadolol Propranolol Varices Cirrhosis CPSH

Effect of Scutellariae Radix extract on experimental dextran-sulfate sodium-induced colitis in rats

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World Journal of Gastroenterology 2007年第42期13卷 5605-5611页

作者： Ho-lam Chung Grace Gar-Lee Yue ka-Fai To Ya-Lun Su Yu Huang Wing-Hung Ko Department of Physiology Faculty of MedicineThe Chinese University of Hong Kong Shatin Hong Kong China Institute of Chinese Medicine The ChineseUniversity of Hong Kong Shatin Hong Kong China Department of Anatomical and Cellular Pathology Faculty of Medicine The Chinese University of Hong KongShatin Hong Kong China Institute of Materia Medica Chinese Academy ofMedical Sciences and Peking Union Medical College Beijing100050 China Department of Physiology and Lika Shing Institute of Health Sciences Faculty of Medicine TheChinese University of Hong Kong Shatin Hong Kong China

AIM： To investigate the effect of Scutellariae Radix extract （SRE） on ulcerative colitis （UC） in rats induced by dextran-sulfate sodium （DSS）. METHODS： Colitis was induced in male Sprague-Dawley （SD） rats （170-180 g） by 4% dextran sulfate sodium （DSS, wt/v, MW 54000） in drinking water for 8 d. The treated rats received 4% DSS and SRE orally （100 mg/kg per day）. Control rats received either tap water or SRE only. Macroscopic assessment which included body weight changes, fecal occult blood and stool consistency were determined daily. At the appointed time, the rats were sacrificed and the entire colons were removed. The colon length and the myeloperoxidase （MPO） activity were measured. The severity of colitis was graded by morphological and histological assessments. The ion transport activity of the colonic mucosa was assessed by electrophysiological technique. RESULTS： Rats treated with oral administration of 4% DSS regularly developed clinical and macroscopic signs of colitis. Treatment with SRE relieved the symptoms, including the reduction in body weight, shortening 2nd ulceration of the colon. Administration of SRE also significantly reduced the histological damage induced by DSS. Moreover, the Isc responses of the colonic mucosa to forskolin, were suppressed after the induction of colitis. The stimulated ion transport activity of DSS-rats treated with SRE displayed significant improvement in the secretory responsiveness. CONCLUSION： SRE was effective in treating acute DSS- induced ulcerative colitis, as gauged by reduced clinical disease, improved macroscopic and histological damage scores, and enhanced recovery of normal colonic secretory function.

关键词： Ulcerative colitis Scutellariae Radix Inflammatory bowel disease Colonic ion transport Traditional Chinese medicine

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微量供油下的线接触副润滑增效分析

中国机械工程 2024年第7期35卷 1205-1211页

作者：李书义郭峰黄柏林金薇梁鹏青岛理工大学机械与汽车工程学院青岛266520 香港城市大学机械工程系中国香港999077

实验发现亲/疏油交替供油的功能润湿表面能提高微量供油下有效润滑的成膜性能。基于此,建立了有限长滚子副润滑模型,分析了交替供油的亲/疏油带宽及工作参数对润滑性能的增强规律。研究发现,微量供油条件下可利用交替供油方式达到线接... 详细信息

实验发现亲/疏油交替供油的功能润湿表面能提高微量供油下有效润滑的成膜性能。基于此,建立了有限长滚子副润滑模型,分析了交替供油的亲/疏油带宽及工作参数对润滑性能的增强规律。研究发现,微量供油条件下可利用交替供油方式达到线接触副润滑增效的目的,但供油交替变换使接触区润滑性能不稳定,且润滑增效作用会受功能表面亲/疏油带宽和卷吸速度的影响。

关键词：线接触副微量润滑功能表面供油

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Late retroperitoneal recurrence of hepatocellular carcinoma 12 years after initial diagnosis

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World Journal of Gastroenterology 2010年第17期16卷 2187-2189页

作者： Tiffany Cho-lam Wong ka-Fai To Simon See-Ming Hou Sidney kam-Hung Yip Chi-Fai Ng Department of Surgery Prince of Wales HospitalThe Chinese University of Hong Kong Department of Anatomical and Cellular Pathology The Chinese University of Hong Kong

Hepatocellular carcinoma (HCC) is an aggressive tumor with poor long-term ***,we present an unusual patient with a solitary recurrence of HCC in the right kidney 12 years after the initial *** illustrates the importan... 详细信息

关键词： Hepatocellular carcinoma Late recurrence Metastasis Retroperitoneal

A reference-grade genome of the xerophyte Ammopiptanthus mongolicus sheds light on its evolution history in legumes and droughttolerance mechanisms

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Plant Communications 2024年第7期5卷 157-177页

作者： Lei Feng Fei Teng Na Li Jia-Cheng Zhang Bian-Jiang Zhang Sau-Na Tsai Xiu-Le Yue Li-Fei Gu Guang-Hua Meng Tian-Quan Deng Suk-Wah Tong Chun-Ming Wang Yan Li Wei Shi Yong-Lun Zeng Yue-Ming Jiang Weichang Yu Sai-Ming Ngai Li-Zhe An Hon-Ming lam Jun-Xian He School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong KongSha TinNew TerritoriesHong KongChina Guangdong Provincial Key Laboratory of Biotechnology for Plant Development School of Life SciencesSouth China Normal UniversityGuangzhou 510631China BGI-Shenzhen Tech Co. Ltd.Beishan Industrial ZoneYantian DistrictShenzhen 518083China School of Life Sciences and Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations Lanzhou UniversityLanzhou 730030China State Key Laboratory of Subtropical Silviculture Zhejiang Agriculture and Forestry UniversityHangzhou 311300China State Key Laboratory of Plant Diversity and Specialty Crops South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China Guangdong Provincial Key Laboratory of Applied Botany&Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China College of Life Sciences and Oceanography Shenzhen UniversityShenzhen 518060China State Key Laboratory of Efficient Production of Forest Resources Beijing Forestry UniversityBeijing 100083China

Plants that grow in extreme environments represent unique sources of stress-resistance genes and *** mongolicus(Leguminosae)is a xerophytic evergreen broadleaf shrub native to semi-arid and desert regions;however,its drought-tolerance mechanisms remain poorly ***,we report the assembly of a reference-grade genome for ***,describe its evolutionary history within the legume family,and examine its drought-tolerance *** assembled genome is 843.07 Mb in length,with 98.7%of the sequences successfully anchored to the nine chromosomes of *** genome is predicted to contain 47611 protein-coding genes,and 70.71%of the genome is composed of repetitive sequences;these are dominated by transposable elements,particularly longterminal-repeat *** analyses revealed two whole-genome duplication(WGD)events at 130 and 58 million years ago(mya)that are shared by the genus Ammopiptanthus and other legumes,but no species-specific WGDs were found within this *** genome reconstruction revealed that the *** genome has undergone fewer rearrangements than other genomes in the legume family,confirming its status as a"relict plant".Transcriptomic analyses demonstrated that genes involved in cuticular wax biosynthesis and transport are highly expressed,both under normal conditions and in response to polyethylene glycol-induced *** induction of genes related to ethylene biosynthesis and signaling was also observed in leaves under dehydration stress,suggesting that enhanced ethylene response and formation of thick waxy cuticles are two major mechanisms of drought tolerance in *** expression of AmERF2,an ethylene response factor unique to ***,can markedly increase the drought tolerance of transgenic Arabidopsis thaliana plants,demonstrating the potential for application of *** genes in crop improvement.

关键词： Ammopiptanthus mongolicus genome sequencing genome evolution drought tolerance cuticular wax ethylene

Chinese medicine practitioner turnover rate and the development of Chinese medicine in Hong Kong,China

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Journal of Traditional Chinese Medical Sciences 2021年第2期8卷 145-149页

作者： ka-Kit Chua Vivien Lau Wing-Yan Lee Chun-Pong lam School of Chinese Medicine Hong Kong Baptist UniversityHong KongChina Sin-Hua Herbalist's&Herb Dealer's Promotion Society Limited Hong KongChina Alumni Association of Full-time Chinese Medicine Undergraduate Hong Kong Baptist UniversityHong KongChina

Objective:To establish that the Hong Kong Special Administrative Region(HKSAR)government is actively promoting Chinese medicine(CM)and to examine turnover rate of Chinese medicine practitioners(CMPs)in Hong Kong,China in light of this governmental ***:This study covered two major areas:reviewing CM development in Hong Kong,and assessing the turnover rate of CMPs in Hong *** first part of the paper is a historical *** investigation of turnover rate had two *** 1,quantitative method,involved online questionnaires;Section 2,qualitative method comprised interviews with CMPs from different types of CM clinics to ascertain the reasons for the turnover among ***:A total of 123 online questionnaires were received in Section 1(55 from male CMPs;66 from female CMPs;2 respondents were unwilling to disclose their sex).The proportion of CMPs who had resigned in 2018e19 was 22.8%(28),of whom 5.7%(7)had resigned twice in one *** rates of resignation in 3 years and 5 years were up to 40.7%(50)and 56.9%(70),*** CMPs were interviewed in Section *** CMPs were more likely to resign than *** large gap between actual salary and expectations appeared to be the main reason for the high rate of ***:HKSAR government keenly desires to promote CM in Hong Kong,however,high turnover rate of CMPs was detected even under this positive governmental *** is an urgent need to conduct a more representative study of the reasons for the inclination of CMPs in Hong *** study highlights an important issue in CM development,and these results should remind different stakeholders in the CM industry and the government that CMPs need better career prospects and support in various areas.

关键词： Chinese medicine development Chinese Medicine Turnover rate Hong Kong SAR Career prospect Salary

Molecular genetic analysis of a Chinese patient with Fabry disease

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Chinese Medical Journal 2000年第2期113卷 90-92页

作者： Ching-Wan lam Ying-Tat Mak Yuk-Ming Dennis Lo Sui-FanTong ka-Fai To Fernand Mac-Moune Lai Department of Chemical Pathology Chinese University of Hong Kong Prince of Wales Hospital Hong Kong Hong Kong Dept. of Anat. and Cell. Pathology Chinese University of Hong Kong Prince of Wales Hospital Hong Kong Hong Kong