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UTILIZING PHASE RETARD INTEGRATION METHOD OF FLOW BIREFRINGENCE TO ANALYSE THE FLOW WITH SYMMETRIC PLANE

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Acta Mechanica Sinica 1990年第4期6卷 374-381页

作者： chen yuhai Jia Youquan Shu Wei (Department of Mechanics,Tianjin University,Tianjin,China) Department of Mechanics Tianjin University Tianjin China

The formulas which are suitable to birefringent medium with symmetric plane are derived by means of phase retard *** have adopted this concept to the axisymmetric problems and deduced some useful formulas for these *** a practical application,the strain rate analysis of flow in a diverging or a converging vessel is illustrated at the end of this paper.

关键词： flow birefringence phase retard integration integral photoelasticity

Distribution of soil organic carbon under different vegetation zones in the Ili River Valley, Xinjiang

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Journal of Geographical Sciences 2010年第5期20卷 729-740页

作者： YANG yuhai chen Yaning LI Weihong chen Yapeng Key Laboratory of Oasis Ecology and Desert Environment Xinjiang Institute of Ecology and Geography CASUrumqi 830011 China

We analyzed and estimated the distribution and reserves of soil organic carbon under nine different vegetation conditions including alpine meadow, meadow steppe, typical steppe, desert steppe, and temperate coniferous forest and so on, in the Ill River valley, Xin- jiang according to data from field investigations and laboratory analyses in 2008 and 2009. The study results show that the soil organic carbon content in the Ili River valley varies with the type of vegetation. In the 0-50 cm soil horizon, the soil organic carbon content is the highest under the vegetation types of alpine meadow and meadow steppe, slightly lower under temperate coniferous forest and typical steppe, and the lowest under the intrazonal vegetation and desert vegetation types. The soil organic carbon content shows basically a tendency to decrease as soil depth increases under various vegetation types except in the case of the intrazonal vegetation. Similarly, the soil organic carbon density is the highest and varies little under the vegetation types of alpine meadow, meadow steppe and temperate coniferous forest, and is the lowest under the desert vegetation type. Both the soil organic carbon content and density in the topsoil of meadows in the Ili River valley are high, so pro- tecting meadows in the Ili River valley, and especially their topsoil, should be a priority so that the potential of change in soil organic carbon in the shallow soil horizon is reduced, and this means maintenance of the stability of the soil carbon pool.

关键词： vegetation grassland soil organic carbon Ili River Valley

Real-Time Co-optimization of Gear Shifting and Engine Torque for Predictive Cruise Control of Heavy-Duty Trucks

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 294-317页

作者： Hongqing Chu Xiaoxiang Na Huan Liu yuhai Wang Zhuo Yang Lin Zhang Hong chen School of Automotive Studies Tongji UniversityShanghaiChina Department of Engineering University of CambridgeCambridgeUK State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchunChina Qingdao Automotive Research Institute Jilin UniversityQingdaoChina Dongfeng Commercial Vehicle Technology Center Dongfeng Motor CorporationWuhanChina

Fuel consumption is one of the main concerns for heavy-duty *** cruise control(PCC)provides an intriguing opportunity to reduce fuel consumption by using the upcoming road *** this study,a real-time implementable PCC,which simultaneously optimizes engine torque and gear shifting,is proposed for heavy-duty *** minimize fuel consumption,the problem of the PCC is formulated as a nonlinear model predictive control(MPC),in which the upcoming road elevation information is *** the solution of the nonlinear MPC is time consuming;thus,a real-time implementable solver is developed based on Pontryagin’s maximum principle and indirect shooting *** programming(DP)algorithm,as a global optimization algorithm,is used as a performance benchmark for the proposed ***,hardware-in-the-loop and real-truck experiments are conducted to verify the performance of the proposed *** results demonstrate that the MPC-based solution performs nearly as well as the DP-based solution,with less than 1%deviation for testing ***,the proposed co-optimization controller is implementable in a real-truck,and the proposed MPC-based PCC algorithm achieves a fuel-saving rate of 7.9%without compromising the truck’s travel time.

关键词： Heavy-duty truck Predictive cruise control Model predictive control Pontryagin’s maximum principle Real-truck implementation

Arbuscular mycorrhizal fungi infection in desert riparian forest and its environmental implications: A case study in the lower reach of Tarim River

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Progress in Natural Science:Materials International 2008年第8期18卷 983-991页

作者： yuhai Yang, Yaning chen *, Weihong Li Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China Key Laboratory of Oasis Ecology and Desert Environment Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

This study was conducted on the desert riparian forest along the lower reach of the inland Tarim River, which is located in the arid region of Northwest *** plant species in 10 families were collected from five monitoring sections,and examined for the infection of arbuscular mycorrhizal fungi (AMF). The impact of different soil factors on AMF infection rate and intensity was compared using the principal component analysis (PCA) method. The results indicate that 11 species are AM and only 4 are non-AM plants. The estimated capacity of AMF infection depends on families of plants and also the parameters (infection rate, infection intensity, fungal spore density) used. The density of fungal spores was relatively higher in Phragmites communis and Populus euphratica in Graminaceae and Salicaceae families, *** infection rate was above 50%in all the AM plants,except Calligonum *** highest infection rate appeared in Alhagi sparsifolia (97%) and Glycyrrhiza inflata (92%). However, when compared by AMF infection intensity, Tamarix spp. became the top one, followed by Alhagi sparsifolia, and Glycyrrhiza inflata was in the middle range of all the species. The PCA has identified that soil total salt, moisture, organic matter, total nitrogen, total P, available K and pH were closely associated with the AMF infection.

关键词： Arbuscular mycorrhiza Infection Ecological restoration Desert riparian forest Soil

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一种烧结工序多热源利用发电工艺

烧结球团 2016年第5期41卷 57-61页

作者：陈玉海北京中冶设备研究设计总院有限公司北京100029

从余热发电角度出发,对2×150m^2烧结机余热资源的分布情况及热烟气余热回收进行了探讨。针对烧结工序生产不稳定的特点,在改变环冷机余热取风方案的基础上,利用主烟道废气和环冷机烟气进行余热发电,由环冷机余热锅炉对主烟道锅炉产汽... 详细信息

从余热发电角度出发,对2×150m^2烧结机余热资源的分布情况及热烟气余热回收进行了探讨。针对烧结工序生产不稳定的特点,在改变环冷机余热取风方案的基础上,利用主烟道废气和环冷机烟气进行余热发电,由环冷机余热锅炉对主烟道锅炉产汽进行再热后进入汽轮机发电,采用多热源供汽协同控制,实现了发电系统的可靠运行。采用新方案后外供电量可提高9%左右且总投资减少,项目投资回收期缩短。本文从工艺设计角度对设备选型及参数确定进行了详细介绍与分析,以供同行参考。

关键词：烧结工序多热源利用余热发电协同控制

基于马尔可夫链的央行分支机构人力资源的短期预测

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南方金融 2008年第3期 10-13页

作者：陈玉海中南大学湖南长沙410065

本文根据中国人民银行广州分行人力资源变量的现状及其变化趋势,应用马尔可夫链预测其在未来三年期间内某个时间点上人力资源可能出现的状态,从而为中国人民银行广州分行人力资源管理提供可靠的理论依据。

关键词：马尔可夫链人力资源结构短期预测

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金融全力支持中小微纾困发展

中国金融 2022年第2期 49-51页

作者：陈玉海中国人民银行广州分行

中小微企业量大面广,是广东省经济韧性、就业韧性的重要支撑,构成全省经济发展的重要基础。在新冠肺炎疫情冲击和外部环境不确定性增强的严峻挑战面前,广东中小微企业迅速恢复生产经营,业绩增长势头强劲。2021年1~9月,全省规模以上中小... 详细信息

中小微企业量大面广,是广东省经济韧性、就业韧性的重要支撑,构成全省经济发展的重要基础。在新冠肺炎疫情冲击和外部环境不确定性增强的严峻挑战面前,广东中小微企业迅速恢复生产经营,业绩增长势头强劲。2021年1~9月,全省规模以上中小微工业企业完成增加值1.46万亿元,同比增长16.8%。在广东中小微企业攻坚克难、纾困发展、提质增效期间.

关键词：中小微企业小微工业企业纾困外部环境不确定性提质增效经济韧性金融攻坚克难

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猩红S褪色分光光度法测定硫酸卡那霉素

化学通报 2007年第12期70卷 951-953页

作者：陈玉海王丽康连山保定职业技术学院保定071051

在pH为2.5～3.0的条件下,猩红S与硫酸卡那霉素(KANA)反应生成复合比为1:1的复合物,使猩红S溶液褪色,最大褪色波长位于535nm,表观摩尔吸光系数(ε)为2.34×104L/(***),硫酸卡那霉素的浓度在3.5×10-7～8.75×10-6mol/L范围内符合比耳定... 详细信息

在pH为2.5～3.0的条件下,猩红S与硫酸卡那霉素(KANA)反应生成复合比为1:1的复合物,使猩红S溶液褪色,最大褪色波长位于535nm,表观摩尔吸光系数(ε)为2.34×104L/(***),硫酸卡那霉素的浓度在3.5×10-7～8.75×10-6mol/L范围内符合比耳定律。该法用于实际样品平行6次测定,相对标准偏差1.5%～2.9%,回收率95.3%～104.9%。

关键词：猩红S 硫酸卡那霉素褪色光度法

Fulminant myocarditis induced by SARS-CoV-2 infection without severe lung involvement:insights into COvID-19 pathogenesis

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Journal of Genetics and Genomics 2024年第6期51卷 608-616页

作者： Han Du Zhongtao Du Liang Wang Hong Wang Mingjun Jia Chunge Zhang Yun Liu cheng Zhang Ya Zhang Ruifeng Zhang Shuang Zhang Ning Zhang Zhenghai Ma chen chen Wenjun Liu Hui Zeng George F.Gao Xiaotong Hou yuhai Bi College of Life Science and Technology Xinjiang UniversityUrumchiXinjiang 830046China CAS Key Laboratory of Pathogen Microbiology and Immunology Institute of MicrobiologyCenter for Influenza Research and Early-warning(CASCIRE)CAS-TWAS Center of Excellence for Emerging Infectious Diseases(CEEID)Chinese Academy of SciencesBeijing 100101China Beijing Anzhen Hospital Capital Medical UniversityBeijing 100029China College of Veterinary Medicine Shanxi Agricultural UniversityTaiyuanShanxi 030031China University of Chinese Academy of Sciences Beijing 100049China Beijing Shijitan Hospital Capital Medical UniversityBeijing 100038China

Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection often leads to pulmonary *** sequelae,including myocarditis and heart failure,have also been ***,the study presents two fulminant myocarditis cases infected by SARS-CoV-2 exhibiting remarkable elevation of cardiac biomarkers without significant pulmonary injury,as determined by imaging *** staining reveals the viral antigen within cardiomyocytes,indicating that SARSCoV-2 could directly infect the *** full viral genomes from respiratory,anal,and myocardial specimens are obtained via next-generation *** analyses of the whole genome and spike gene indicate that viruses in the myocardium/pericardial effusion and anal swabs are closely related and cluster together yet diverge from those in the respiratory *** addition,unique mutations are found in the anal/myocardial strains compared to the respiratory strains,suggesting tissue-specific virus mutation and *** findings indicate genetically distinct SARS-CoV-2 variants have infiltrated and disseminated within myocardial tissues,independent of pulmonary injury,and point to different infection routes between the myocardium and respiratory tract,with myocardial infections potentially arising from intestinal *** findings highlight the potential for systemic SARS-CoV-2 infection and the importance of a thorough multi-organ assessment in patients for a comprehensive understanding of thepathogenesisof COVID-19.

关键词： COVID-19 SARS-CoV-2 Fulminant myocarditis Myocardium Infection