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Evaluation of ERA-Interim Monthly Temperature Data over the Tibetan Plateau

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Journal of Mountain Science 2014年第5期11卷 1154-1168页

作者： GAO Lu HAO Lu chen xing-wei College of Geographical Sciences Fujian Normal University Fujian Provincial Engineering Research Center for Monitoring and Assessing Terrestrial Disasters Research Center for National Geographical Condition Monitoring and Emergency Support in the Economic Zone on the West Side of the Taiwan Strait College of Applied Meteorology Nanjing University of Information Science & Technology

In this study, surface air temperature from 75 meteorological stations above 3000 m on the Tibetan Plateau are applied for evaluation of the European Centre for Medium-Range Weather Forecasts(ECMWF) third-generation reanalysis product ERA-Interim in the period of 1979-2010. High correlations ranging from 0.973 to 0.999 indicate that ERA-Interim could capture the annual cycle very well. However, an average root-meansquare error(rmse) of 3.7°C for all stations reveals that ERA-Interim could not be applied directly for the individual sites. The biases can be mainly attributed to the altitude differences between ERA-Interim grid points and stations. An elevation correction method based on monthly lapse rates is limited to reduce the bias for all stations. Generally, ERA-Interim captured the Plateau-Wide annual and seasonal climatologies very well. The spatial variance is highly related to the topographic features of the TP. The temperature increases significantly(10°C- 15°C) from the western to the eastern Tibetan Plateau for all seasons, in particular during winter and summer. A significant warming trend(0.49°C/decade) is found over the entire Tibetan Plateau using station time series from 1979-2010. ERA-Interim captures the annual warming trend with an increase rate of 0.33°C /decade very well. The observation data and ERA-Interim data both showed the largest warming trends in winter with values of 0.67°C/decade and 0.41°C/decade, respectively. We conclude that in general ERA-Interim captures the temperature trends very well and ERA-Interim is reliable for climate change investigation over the Tibetan Plateau under the premise of cautious interpretation.

关键词： Reanalysis Air temperature Warming trend Tibetan Plateau

Spatial and temporal variations in nitrogen retention effects in a subtropical mountainous basin in Southeast China

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Journal of Mountain Science 2021年第10期18卷 2672-2687页

作者： LIU Mei-bing chen xing-wei chen Ying GAO Lu DENG Hai-jun State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province Fujian Normal UniversityFuzhou 350007China College of Geographical Sciences Fujian Normal UniversityFuzhou 350007China Fujian Provincial Engineering Research Center for Monitoring and Assessing Terrestrial Disasters Fujian Normal UniversityFuzhou 350007China

Nitrogen retention within a watershed reduces the amount of N exported to the ocean;however, it worsens environmental problems, including surface water eutrophication, aquifer pollution, acid rain, and soil acidification. Here, we adopted the Soil and Water Assessment Tool(SWAT) model to describe the riverine N output and retention effects in the Shanmei Reservoir Basin, a subtropical mountainous basin located in Quanzhou City, Southeast China. The results revealed that farmlands and orchards in the upstream and central parts of the basin were the dominant land use types, which contributed large N yields. Fertilizer application was the key source of riverine N output and N retention within the basin. On average, approximately 64% of anthropogenic N inputs were retained within the basin, whereas 36% of total N was exported to the downstream and coastal areas. The average N retention efficiency was 80% in a dry year, and within the year, N retention occurred in spring and summer and N release occurred in autumn and winter. The annual variation in N retention within the basin was largely dominated by changes in rainfall and runoff, whereas the seasonal characteristics of N retention were mainly affected by fertilization. Even with a large decrease in fertilizer application, owing to the contributions of the residual N pool and river background, the riverine N output still maintained a certain base value. The effects of precipitation, land use types, and agricultural fertilizer on N retention should be comprehensively considered to implement reasonable N management measures.

关键词： Nitrogen retention Riverine nitrogen output Precipitation and runoff Fertilization management Subtropical mountainous basin

On π-regularity of General Rings

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Communications in Mathematical Research 2010年第4期26卷 313-320页

作者： chen wei-xing CUI SHU-YING School of Mathematics and Information Science Shandong Institute of Business and Technology Yantai 264005

A general ring means an associative ring with or without *** idempotent e in a general ring I is called left (right) semicentral if for every x ∈ I,xe=exe (ex=exe).And I is called semiabelian if every idempotent in I is left or right *** is proved that a semiabelian general ring I is π-regular if and only if the set N (I) of nilpotent elements in I is an ideal of I and I /N (I) is *** follows that if I is a semiabelian general ring and K is an ideal of I,then I is π-regular if and only if both K and I /K are π-*** on this we prove that every semiabelian GVNL-ring is an *** generalize several known results on the relevant *** we give a characterization of a semiabelian GVNL-ring.

关键词： semiabelian ring π-regular ring GVNL-ring exchange ring

On Weakly Semicommutative Rings

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Communications in Mathematical Research 2011年第2期27卷 179-192页

作者： chen wei-xing CUI SHU-YING School of Mathematics and Information Science Shandong Institute of Business and Technology Yantai Shandong 264005

A ring R is said to be weakly semicommutative if for any a,b∈R, ab=0 implies aRb（？）Nil（R）,where Nil（R） is the set of all nilpotent elements in R. In this note,we clarify the relationship between weakly semicommutative rings and NI-rings by proving that the notion of a weakly semicommutative ring is a proper generalization of *** say that a ring R is weakly 2-primal if the set of nilpotent elements in R coincides with its Levitzki radical,and prove that if R is a weakly 2-primal ring which satisfiesα-condition for an endomorphismαof R（that is,ab=0（？）aα（b）=0 where a,b∈R） then the skew polynomial ring R[x;α] is a weakly 2-primal ring,and that if R is a ring and I is an ideal of R such that I and R/I are both weakly semicommutative then R is weakly semicommutative. Those extend the main results of Liang et al.2007（Taiwan Residents ***.,11（5）（2007）, 1359-1368） ***,several new results about weakly semicommutative rings and NI-rings are included.

关键词： weakly semicommutative ring weakly 2-primal ring NLring Armen- dariz ring

Endoscopic nasojejunal feeding tube placement in patients with severe hepatopancreatobiliary diseases:a retrospective study of 184 patients

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Hepatobiliary & Pancreatic Diseases International 2010年第1期9卷 54-59页

作者： Ji, Feng Zhao, Jing-Li Jin, Xi Jiao, Chun-Hua Hu, Yu-Yao Xu, Qin-wei chen, wei-xing Zhejiang Univ Sch Med Affiliated Hosp 1 Dept Gastroenterol Hangzhou 310003 Zhejiang Peoples R China

BACKGROUND: Total parenteral nutrition (TPN) has been recognized as the mainstay of nutritional support in patients with severe hepatopancreatobiliary (HPB) diseases for decades. However, recent studies advocate the utilization of endoscopic nasojejunal feeding tube placement (ENFTP), rather than the conventional approach. This study was designed to compare the clinical value of ENFTP and TPN in patients with severe HPB diseases. METHODS: Two groups of patients with severe HPB diseases were analyzed retrospectively. One group of 88 patients received ENFTP, and the other 96 received TPN. Routine blood levels, serum glucose and prealbumin, hepatic and renal function, serum lipid, and calcium were measured at baseline and after 1, 2, and 4 weeks of nutritional support. Also, complication rate, mortality, nutritional support time, mechanical ventilation time, mean length of time in intensive care unit, and duration of hospital stay were analyzed. RESULTS: After 4 weeks of nutritional support, the degree of recovery of red blood cells, prealbumin, and blood glucose was greater in the ENFTP than in the TPN group (P<0.05). Furthermore, the ENFTP group showed a lower incidence of septicemia, multiple organ dysfunction syndrome, peripancreatic infection, biliary infection, and nosocomial infection, in addition to shorter nutritional support time and hospital stay (P<0.05). CONCLUSIONS: ENFTP is much more effective than TPN in assisting patients with severe HPB diseases to recover from anemia, low prealbumin level, and high serum glucose, as well as in decreasing the rates of various infections (pulmonary infection excluded), multiple organ dysfunction syndrome rate, nutrition support time, and length of hospital stay. Therefore, ENFTP is safer and more economical for clinical application.

关键词： tube feeding, nasojejunal endoscopy parenteral nutrition, total hepatobiliary disease pancreatic disease

Multiple imaging techniques in the diagnosis of ampullary carcinoma

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Hepatobiliary & Pancreatic Diseases International 2008年第6期7卷 649-653页

作者： chen, wei-xing Xie, Qi-Gui Zhang, wei-Fang Zhang, Xian Hu, Tian-Tian Xu, Ping Gu, Zhu-Ying Zhejiang Univ Sch Med Affiliated Hosp 1 Surg Intens Care Unit Hangzhou 310003 Zhejiang Peoples R China Zhejiang Univ Sch Med Affiliated Hosp 1 Dept Gastroenterol Hangzhou 310003 Zhejiang Peoples R China

BACKGROUND: Ampullary carcinoma is a neoplasia with a good prognosis compared to pancreatic cancer. But it is difficult to early diagnose because it lacks clear clinical symptoms. This study aimed to evaluate the efficacy of abdominal ultrasonography (US), enhanced computed tomography (CT), magnetic resonance cholangiopancreatography (MRCP) and endoscopic retrograde cholangiopancreatography (ERCP) in detecting ampullary carcinoma. METHODS: Forty-one patients with ampullary carcinoma who had been confirmed pathologically among the inpatients at the First Affiliated Hospital of Zhejiang University School of Medicine from February 2003 to March 2007 were analyzed retrospectively. The accuracy of US, CT, MRCP and ERCP were compared in the diagnosis of ampullary carcinoma. RESULTS: The accurate rate for detection of ampullary carcinoma with US was 26.83%. The accuracy of CT and ERCP in detection of ampullary tumors was 84.62% and 100%, respectively, which were significantly higher than that of US (P<0.05). The accuracy of MRCP in detection of ampullary tumors was similar to that of US in spite of visualization of obstruction and dilatation of the pancreaticobiliary duct with MRCP. CONCLUSIONS: Because of the obscure and late onset of symptoms, ampullary carcinoma is difficult to diagnose early. Multiple imaging techniques should be carried out appropriately in order to early diagnose the disease and improve the prognosis.

关键词： ampullary carcinoma abdominal ultrasonography computed tomography magnetic resonance cholangiopancreatography endoscopic retrograde cholangiopancreatography

Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

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Nano-Micro Letters 2025年第1期17卷 281-292页

作者： xing Wang wei Pi Sheng Hu Haifeng Bao Na Yao wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer

Effect of Water Temperature on Feeding Rhythm in Common Carp (Cyprinus carpio haematopterus Temminck et Schlegel)

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Journal of Northeast Agricultural University(English Edition) 2012年第1期19卷 57-61页

作者： chen Song-bo chen wei-xing Fan Zhao-ting College of Animal Sciences and Technology Northeast Agricultural UniversityHarbin 150030China

Feeding rhythm of common carp was investigated from 4℃ to 34℃. The results indicated that there was a diel feeding rhythm for both adult （630-850 g） and youth （61-91 g） at all tested temperatures. There were two main activity peaks at 8：00-11：00 a.m. and 19：00-23：00 p.m., during which feeding quantities were 10.68%-32.53% and 16.25%-33.41% of the daily intake, respectively. When water temperature dropped to below 10℃, the feeding peak concentrated at 8：00-11：00 a.m. and 19：00 p.m. to 4：00 a.m. At 6℃, though both adult and youth would still feed, the feeding quantities were only 0.01% and 0.35% of body mass. Daily feeding rate of adult and youth reached 1.21% and 2.63% at 14℃, respectively. Both adult and youth carps reached the maximum daily feeding rate at 28℃, being 2.84% and 12.06% of body mass, respectively. The daily feeding rate of adult and youth reduced suddenly after at 34℃, and the daily feeding rate was only 0.74% and 9.45% of body mass, respectively. There was significant difference in daily feeding rate at different water temperatures （P〈0.05）.

关键词： common carp feeding rate diel feeding rhythm water temperature

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可重构信息安全系统研究综述

电子学报 2017年第5期45卷 1240-1248页

作者：肖玮陈性元包义保解放军信息工程大学密码工程学院河南郑州450000 空军航空大学基础基地吉林长春130022 密码科学技术国家重点实验室北京100000

传统安全计算提供固定的安全服务能力,无法根据环境和安全需求的变化灵活配置,导致安全管理复杂,软硬件资源重复利用率低.可重构安全计算为提升系统灵活性、适应性和可扩展性提供了新的手段.本文阐述了可重构安全计算的发展历程,初步研... 详细信息

传统安全计算提供固定的安全服务能力,无法根据环境和安全需求的变化灵活配置,导致安全管理复杂,软硬件资源重复利用率低.可重构安全计算为提升系统灵活性、适应性和可扩展性提供了新的手段.本文阐述了可重构安全计算的发展历程,初步研究了其内涵与意义,提出了可重构安全计算的概念模型,并详细论述了其中的关键技术及其研究现状,最后分析了可重构安全计算的发展趋势.可重构信息安全系统是新型计算与信息安全技术融合的必然产物,必将为信息安全技术提供更广阔的应用空间.

关键词：可重构信息安全系统可重构安全计算灵活性适应性