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Estimating canopy closure density and above-ground tree biomass using partial least square methods in Chinese boreal forests

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Journal of Forestry Research 2012年第2期23卷 191-196页

作者： LEI cheng-liang JU Cun-yong CAI Ti-jiu J1ng Xia WEI Xiao-hua DI Xue-ying School of Forestry Northeast Forestry UniversityHarbin 150040P.R.China College of Geomatics Xi'an University of Science and TechnologyXi'an 710054P.R.China Department of Earth and Environmental Science University of BritishColumbia(Okanagan)3333 University wayKelownaBritish Colum-biaCanadaV1V 1V7.

Boreal forests play an important role in global environment systems. Understanding boreal forest ecosystem structure and function requires accurate monitoring and estimating of forest canopy and biomass. We used partial least square regression （PLSR） models to relate forest parameters, i.e. canopy closure density and above ground tree biomass, to Landsat ETM＋ data. The established models were optimized according to the variable importance for projection （VIP） criterion and the bootstrap method, and their performance was compared using several statistical indices. All variables selected by the VIP criterion passed the bootstrap test （p〈0.05）. The simplified models without insignificant variables （VIP 〈1） performed as well as the full model but with less computation time. The relative root mean square error （RMSE%） was 29% for canopy closure density, and 58% for above ground tree biomass. We conclude that PLSR can be an effective method for estimating canopy closure density and above ground biomass.

关键词： above-ground tree biomass bootstrap method canopy clo- sure density partial least square regression (PLSR) VIP criterion

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新加坡中央医院针灸门诊的规范化管理

中国针灸 2014年第2期34卷 179-182页

作者：崔淑丽 Tan Kian Hian Ong Biauw Chi Lim Shih hui Yong Yang Seah cheng ngee Youyi Huang han Seong ng 新加坡中央医院疼痛中心针灸门诊新加坡169608 杜克.新加坡国大医学研究生院

介绍新加坡中央医院针灸门诊的规范化管理。通过对门诊基础建设逐渐改进,医务人员再培训,操作过程严格消毒,医疗仪器定期检查,病历书写、保存和处理统一管理,开展公众中医知识教育等,逐渐形成了一套与现代化医院相适应的规范化管理制度... 详细信息

介绍新加坡中央医院针灸门诊的规范化管理。通过对门诊基础建设逐渐改进,医务人员再培训,操作过程严格消毒,医疗仪器定期检查,病历书写、保存和处理统一管理,开展公众中医知识教育等,逐渐形成了一套与现代化医院相适应的规范化管理制度,使临床治疗效率和质量不断提高。自1998年4月至2012年12月,治疗患者74 654人次,日诊量渐增,避免了针灸异常状况的发生,多次通过国内外国际医疗卫生机构认证联合委员会定期的严格审查。此外,针灸门诊还承担了3项新加坡健保集团的科研项目。

关键词：针灸门诊规范化管理新加坡

Composition optimized trimetallic PtNiRu dendritic nanostructures as I versatile and active electrocatalysts for alcohol oxidation

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Nano Research 2019年第3期12卷 651-657页

作者： Yan Lu Wei Wang Xiaowei Chen Yuhui Zhang Yanchen han Yong cheng Xue-Jiao Chen Kai Liu Yuanyuan Wang Qiaobao Zhang Shuifen Xie College of Materials Science and Engineering Huaqiao University Xiamen 361021 China Department of Physics Xiamen University Xiamen 361005 China Shenzhen Research Institute of Xiamen University Shenzhen 518000 China Department of Materials Science and Engineering Xiamen University Xiamen 361005 China

Platinum-based nano crystals are the most effective electrocatalysts for accelerati ng the chemical tran sformatio ns on the anode in direct alcohol fuel cells. To facilitate practical applications and overcome the drawbacks of diverse alcohols, it is significant to develop electrocatalysts with high activities and a wide fuel flexibility. Here, we demonstrate a practicable solution method for fabricating composition tun able trimetallic PtNiRu den dritic nano structures (DNSs) which can serve as versatile and active catalysts for electrooxidatio n of a variety of liquid alcohols. A series of trimetallic DNSs with tun able Pt/Ni/Ru atomic ratios were successfully syn thesized by simply adjusti ng the feeding of precursors. Detailed electrochemical test indicates that, among other compositions, the Pt66Ni27Ru7 DNSs present much superior electroactivity in catalyzing electrooxidation of liquid alcohols in acidic mediums. Specifically, the mass activity and specific activity on the Pt66Ni27Ru7 DNSs, for electrooxidation of methanol, ethanol, and ethylene glycol, are 4.57 and 4.34 times, 3.55 and 3.42 times, and 2.37 and 2.28 times that of the commercial Pt black, respectively. X-ray photoelectron spectroscopy and CO stripping studies reveal the adsorption of CO on these PtNiRu DNSs is much weaker than on pure Pt. Meanwhile, the surface Ru sites can provide neighbouring -OH groups to facilitate the oxidati on and removal of the adsorbed in termediates (-CO) on the surface Pt sites, effectively improvi ng the CO tolera nee of the catalysts. The PtNiRu DNSs also show effectively boosted capacity for breaking the C-C bond in C2-alcohols, showing great potential for fuel-flexible fuel cell applications.

关键词： platinum-based nanocrystals dendritic nanostructures fuel flexibility electrooxidation of alcohols CO toleranee

The role of autophagy in the treatment of osteoporosis by Chinese medicines(natural)

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Traditional Medicine Research 2023年第10期8卷 30-46页

作者： Yu Zhou Xin Li Yang Chen Liqi ng Swastina Nath Varma Chao-Zong Liu Qing Gong cheng-Liang Yin Foot and Ankle Surgery Chongqing Orthopedic Hospital of Traditional Chinese MedicineChongqing 400012China Institute of Orthopaedic and Musculoskeletal Science Royal National Orthopaedic HospitalLondon HA74LPUK Jilin Ginseng Academy Changchun University of Chinese MedicineChangchun 130117China Department of Endocrinology Chongqing Hospital of Traditional Chinese MedicineChongqing 400011China Institute of Traditional Chinese Medicine Changchun University of Chinese MedicineChangchun 130117China Faculty of Medicine Macao University of Science and TechnologyMacao 999078China

Osteoporosis is one of the common orthopaedic diseases,characterised by increased bone fragility due to reduced bone mass and microstructural degeneration,posing a great threat to patients’quality of life and *** recent years,Chinese medicine(natural)has had a unique advantage in the treatment of osteoporosis and has shown good *** is an inherent cellular survival mechanism for the removal and recycling of damaged proteins and organelles and plays an important role in maintaining the stability of the intracellular environment and organ ***,this article aims to provide a comprehensive review of these Chinese medicines(natural)for the treatment of osteoporosis through *** have been intensively studied and reported to have effects such as promoting osteogenesis and anti-bone *** Chinese medicines include plants such as Cistanche deserticola,Epimedium,Curculigo orchioides Gaertn,Achyranthes bidentata Blume,Leonurus japonicus Houtt,Ginseng,Chuanxiong Rhizome,Eucommia ulmoides,Morindae Officinalis Radix,Curcuma longa,Polygoni Cuspidati Rhizoma et Radix,Anemarrhena asphodeloides Bunge,Salvia miltiorrhiza Bge and Pueraria Lobata,thus providing evidence for the use of alternative herbal therapies for the effective treatment of osteoporosis.

关键词： osteoporosis traditional Chinese medicine autophagy herb review

Fast analysis of derivatives of polycyclic aromatic hydrocarbons in soil by ultra-high performance supercritical fluid chromatography after supercritical fluid extraction enrichment

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Petroleum Science 2021年第6期18卷 1860-1866页

作者： Ye-Hua han Li-Min Ren Yan-Fen Zhang Ying-HaoWang cheng-Long Dong Jing Xie Yu-Chi Zhang Wen Zhou State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Hubei Key Laboratory of Processing and Application of Catalytic Materials Huanggang Normal UniversityHuanggang 438000China

An efficient and environment-friendly method for simultaneous determination of 13 typical derivatives of polycyclic aromatic hydrocarbon(PAH)in petroleum-polluted soil with nitro-,oxy-and alkylfunctional group was developed using supercritical fluid extraction(SFE)followed by ultra-high performance supercritical fluid chromatography(UHPSFC).Parameters of UHPSFC,including type of stationary phase and mobile phase modifiers,gradient elution process,backpressure,column temperature,and the flow rate of mobile phase,were systematically optimized,achieving a fast separation within4.2 *** of detection(LOD)were 0.005-0.1μg mL^(-1)or 0.1-2.0 ng g^(-1),respectively,with a good repeatability(RSDng SFE with an online carbon nanotubes(CNTs)collection *** soil samples were analyzed by the proposed method and the results were verified by ***,SFE equipped with an online CNTs trap followed by UHPSFC-PDA analysis,which only consumed about2.0 mL organic solvent for a whole run,has been demonstrated to be an efficient way for screening and quantitative analysis of trace-level PAH-derivatives in soil samples.

关键词： Ultra-high performance supercritical fluid chromatography Derivatives of polycyclic aromatic hydrocarbons Supercritical fluid extraction Fast separation Pollutant screening Quantitative analysis

Waist Circumference Reference Values for Screening Cardiovascular Risk Factors in Chinese Children and Adolescents

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Biomedical and Environmental Sciences 2010年第1期23卷 21-31页

作者： GUAN-SHEng MA cheng-YE JI JUN MA JIE MI R1TA YT SLIng FEng XIOng WEI-LI YAN XIAO-QI HU YAN-PIng LI SOng-M1ng DU HOng-YUN FAng AND J1ng-XIOng JIAng National Institute for Nutrition and Food Safety Chinese Center for Disease Control and Prevention Beijing100050 China Institute of Child and Adolescent Health Peking gniversi07 Health Science Center Beijing100191 China Capital Institute of Pediatrics Beijing 100020 China Department of Paediatrics TheChinese University of Hong Kong Hong Kong Special Administrative Re'on China The Children's Hospital of Chongqing Medical University Chongqing 400014 China School of Public Health Xinjiang Medical University Wulumuqi 830011 Xinjiang China National Center for Women and Childre's Health Chinese Center for Disease Control and Prevention Beijing 100013 China

Objectives To explore the optimal threshold values of waist circumference （WC） for detecting cardiovascular （CV） risk factors among Chinese children and adolescents. Methods Association of WC with CV risk factors was studied among 65 898 children aged 7-18 years whose data were pooled from nine previous studies in China. CV risk factors in this study included hypertension （blood pressure above 95 percentile levels）, dyslipidemia （with one or more of the following three indexes： TG ≥ 1.7 mmol/L, TC ≥ 5.18 mmol/L, and HDL-C ≤ 1.04 mmol/L） and elevated glucose level （fasting plasma glucose ≥5.6 mmol/L）. Receive-operating characteristic analysis （ROC） and logistic regression were employed to derive optimal age- and sex-specific waist circumference references for predicting CV risk factors. Results A slight increasing trend of CV risk factors was observed starting from the 75th percentile of waist circumference in the study population, while a remarkable increasing trend occurred from the 90th percentile. The optimal waist circumference thresholds for predicting high blood pressures were at the 75th percentile for both boys and girls, which was at the 90th percentiles for detecting at least two of the above three CV risk factors. In comparison with children with waist circumference below the 75th percentile, the odds ratio of two CV risk factors doubled among children with waist circumference between the 75th and the 90th percentile, and increased by 6 times among children with waist circumference above the 90th percentile. The trend of high blood pressure increasing with waist circumference remained significant after having been stratified by BMI category. Conclusion The 75th and the 90th percentiles of WC are the optimal cut-off points for predicting an increased and a substantially increased risk of CV factors in Chinese children and adolescents, respectively.

关键词： Waist circumference Cardiovascular disease risk factor China

Data-Oriented Operating System for Big Data and Cloud

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Intelligent Automation & Soft Computing 2024年第4期39卷 633-647页

作者： Selwyn Darryl Kessler Kok-Why ng Su-cheng Haw Faculty of Computing and Informatics Multimedia UniversityCyberjaya63100Malaysia

Operating System(OS)is a critical piece of software that manages a computer’s hardware and resources,acting as the intermediary between the computer and the *** existing OS is not designed for Big Data and Cloud Computing,resulting in data processing and management *** paper proposes a simplified and improved kernel on an x86 system designed for Big Data and Cloud Computing *** proposed algorithm utilizes the performance benefits from the improved Input/Output(I/O)*** performance engineering runs the data-oriented design on traditional data management to improve data processing speed by reducing memory access overheads in conventional data *** OS incorporates a data-oriented design to“modernize”various Data Science and management *** resulting OS contains a basic input/output system(BIOS)bootloader that boots into Intel 32-bit protected mode,a text display terminal,4 GB paging memory,4096 heap block size,a Hard Disk Drive(HDD)I/O Advanced Technology Attachment(ATA)driver and *** are also I/O scheduling algorithm prototypes that demonstrate how a simple Sweeping algorithm is superior to more conventionally known I/O scheduling algorithms.A MapReduce prototype is implemented using Message Passing Interface(MPI)for big data *** attempt was made to optimize binary search using modern performance engineering and data-oriented design.

关键词： Operating system big data cloud computing MapReduce data-oriented

影响慢性阻塞性肺病急性加重患者生活质量的危险因素

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上海第二医科大学学报 2005年第7期25卷 722-726页

作者：曹振英 Tan Wan cheng ng Tze Pin 上海第二医科大学瑞金医院老年病科上海200025 新加坡国立大学医学院新加坡国立大学医学院新加坡国立大学医学院

目的测定和评价慢性阻塞性肺病(COPD)急性加重患者的生活质量和潜在危险因素的发生率及其影响。方法研究两家大型医院因COPD急性加重入院的196个中重度COPD患者。在患者出院时和出院后1月稳定状态,测量肺功能指标、精神状态及用圣乔治... 详细信息

目的测定和评价慢性阻塞性肺病(COPD)急性加重患者的生活质量和潜在危险因素的发生率及其影响。方法研究两家大型医院因COPD急性加重入院的196个中重度COPD患者。在患者出院时和出院后1月稳定状态,测量肺功能指标、精神状态及用圣乔治呼吸问卷测定生活质量,并收集了患者的临床性状、社会性状和照料因素。结果196例患者中,吸烟、抑郁及嗜用镇痛剂、安眠药相当普遍,而完成肺康复、接种流感病毒疫苗和肺炎球菌疫苗以及看护支持却很少。生活质量的症状域均值为55.9,活动域均值为65,影响域均值为32.9,总体均值为46.5。多变量分析显示慢性黏液高分泌症、男性、抑郁、前1年多次入院和治疗依顺性差与症状域值低下独立显著相关;前1年多次入院、抑郁、严重气促和72岁以上老年与活动域值低下独立显著相关;抑郁、前1年多次入院、严重气促、病程长和重度吸烟与影响域值低下独立显著相关;抑郁、前1年多次入院、严重气促和病程长与总体数值低下独立显著相关(P<0.05)。结论COPD急性加重患者的生活质量低下与COPD严重程度、患者精神抑郁状态及照料这些可改善因素有关。

关键词：慢性阻塞性肺病急性加重生活质量危险因素

Expression of annexin A5 in serum and tumor tissue of patients with colon cancer and its clinical significance

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World Journal of Gastroenterology 2017年第39期23卷 7168-7173页

作者： Chong-Bing Sun Ai-Yan Zhao Shuai Ji Xiao-Qing han Zuo-cheng Sun Meng-Chun Wang Fu-Chang Zheng Department of General Surgery Weifang People’s Hospital Department of Anorectal Surgery Linqu People’s Hospital

AIM To investigate the expression of annexin A5 in serum and tumor tissue of patients with colon cancer and to analyze its clinical *** Ninety-three patients with colon cancer treated at our hospital between February 2013 and March 2016 were included in an observation group, and 40 healthy individuals were included in a control group. Enzyme-linked immunosorbent assay was performed to determine the serum level of annexin A5, while immunohistochemistry was performed to determine the expression of annexin A5 in cancer *** The serum level of annexin A5 was 0.184 ± 0.043 ng/m L in the observation group, which was significantly higher than that in the control group(P han that in patients without lymph node metastasis(P han that in patients with stage Ⅰ to Ⅱ disease(P ng/m L in patients whose tumors were positive for annexin A5 expression, which was significantly higher than that in patients whose tumors were negative for annexin A5 expression(P 0.148 ng/m L for serum level of annexin A5 was used in the diagnosis of colon cancer, the sensitivity was 83.90%, and the specificity was 57.50%.CONCLUSION For patients with colon cancer, annexin A5 expression in cancer tissues is related to lymph node metastasis and tumor grade. Serum level of annexin A5 is related to annexin A5 expression in cancer tissues and is of diagnostic relevance.

关键词： Immunohistochemistry Annexin A5 Colon cancer Serum