检索结果-南通市图书馆

Chinese Journal of Electronics 2016年第4期25卷 648-657页

作者： yang Rong li bing WANG jian li Zengyang HU yan College of Computer Science and Technology Hubei University of Science and Technology International School of Software Wuhan University State Key Laboratory of Software Engineering & School of Computer Wuhan University Science and Technology on Integrated Information System Laboratory Institute of SoftwareUniversity of Chinese Academy of Sciences

Recent years have witnessed a rapid growth in using Web services for data publishing and sharing among *** improve the efficiency of software development and economize on human and material resources,service reuse is viewed as a powerful means which will not only reuse atomic services,but also reuse arbitrary granularities of Service process fragments(SPFs).However,effectively reusing arbitrary granularities of SPFs has not been solved yet,let alone taking diverse Qo S preferences of service providers and users into *** this paper,we propose a novel method of SPF reuse,named SCKY,based on the Cocke-Kasami-Younger(CKY) *** first present an extended CKY to do *** we address how to do SPF-query by a probability CKY,i.e.,return a SPF with maximum emergence ***,we explore the SPF-query with a consensus of Qo S preferences between service providers and *** a set of experiments,the effectiveness and robustness of our approach are evaluated.

关键词： Cocke-Kasami-Younger algorithm Service reuse Service process fragment Qo S preferences

High-temperature performance prediction of iron ore fines and the ore-blending programming problem in sintering

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2014年第8期21卷 741-747页

作者： bing-ji yan jian-liang Zhang Hong-wei Guo ling-kun Chen Wei li School of Metallurgical and Ecological Engineering University of Science and Technology Beijing State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing R&D Center of Wuhan Iron and Steel (Group) Corporation

The high-temperature performance of iron ore fmes is an important factor in optimizing ore blending in sintering. However, the application of linear regression analysis and the linear combination method in most other studies always leads to a large deviation from the desired results. In this study, the fuzzy membership functions of the assimilation ability temperature and the liquid fluidity were proposed based on the fuzzy mathematics theory to construct a model for predicting the high-temperature performance of mixed iron ore. Comparisons of the prediction model and experimental results were presented. The results illustrate that the prediction model is more accurate and effective than previously developed models. In addition, fuzzy constraints for the high-temperature performance of iron ore in this research make the results of ore blending more comparable. A solution for the quantitative calculation as well as the programming of fuzzy constraints is also introduced.

关键词： iron ores blending sintering high temperature properties prediction programming

Scaphoid metastasis as the first sign of occult gastroesophageal junction cancer:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2020年第7期8卷 1287-1294页

作者： Yu-Jie Zhang yan-yan Wang Qi yang jian-bing li Department of Orthopedic Surgery The Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009Zhejiang ProvinceChina Department of Oncology Surgery The Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009Zhejiang ProvinceChina Department of Pathology The Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009Zhejiang ProvinceChina

BACKGROUND Metastatic tumors of the hand are very *** are usually late manifestations of massive advanced ***,a small portion of acrometastases are indications of occult primary ***,we report an extremely rare case in which a scaphoid bone lesion was the initial manifestation and was found to be a metastasis from gastroesophageal junction(GEJ)*** SUMMARY A 57-year-old male patient presented with ongoing left wrist pain and swelling after *** was initially misdiagnosed with infection of the scaphoid bone and treated with antibiotics and anti-inflammatory *** radiographic investigations showed a scaphoid pathological fracture,indicating a metastatic tumor derived from the GEJ and/or right lung *** failed to identify the pathology of the mass at the GEJ,which grew in an exophytic pattern.A lung puncture biopsy was not performed because the patient refused the *** relieve his wrist pain and obtain a definite pathology,we resected the scaphoid *** on the clinical and pathological results,the patient was finally diagnosed with multiple metastases of advanced GEJ *** underwent chemotherapy and died 6 mo after his initial *** Despite the rareness of the disease,orthopedic surgeons should consider the possibility of metastasis to the bones of the hand when patients complain of persistent and progressive pain in the hand.

关键词： Hand metastasis Scaphoid Gastroesophageal junction cancer Diagnosis Case report

Microbial community structure and functional metabolic diversity are associated with organic carbon availability in an agricultural soil

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2015年第12期14卷 2500-2511页

作者： li Juan li yan-ting yang Xiang-dong ZHANG jian-jun lin Zhi-an ZHAO bing-qiang Key Laboratory of Plant Nutrition and Fertilizer Ministry of AgricultureInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences

Exploration of soil environmental characteristics governing soil microbial community structure and activity may improve our understanding of biogeochemical processes and soil quality. The impact of soil environmental characteristics especially organic carbon availability after 15-yr different organic and inorganic fertilizer inputs on soil bacterial community structure and functional metabolic diversity of soil microbial communities were evaluated in a 15-yr fertilizer experiment in Changping County, Beijing, China. The experiment was a wheat-maize rotation system which was established in 1991 including four different fertilizer treatments. These treatments included： a non-amended control（CK）, a commonly used application rate of inorganic fertilizer treatment（NPK）; a commonly used application rate of inorganic fertilizer with swine manure incorporated treatment（NPKM）, and a commonly used application rate of inorganic fertilizer with maize straw incorporated treatment（NPKS）. Denaturing gradient gel electrophoresis（DGGE） of the 16 S r RNA gene was used to determine the bacterial community structure and single carbon source utilization profiles were determined to characterize the microbial community functional metabolic diversity of different fertilizer treatments using Biolog Eco plates. The results indicated that long-term fertilized treatments significantly increased soil bacterial community structure compared to CK. The use of inorganic fertilizer with organic amendments incorporated for long term（NPKM, NPKS） significantly promoted soil bacterial structure than the application of inorganic fertilizer only（NPK）, and NPKM treatment was the most important driver for increases in the soil microbial community richness（S） and structural diversity（H）. Overall utilization of carbon sources by soil microbial communities（average well color development, AWCD） and microbial substrate utilization diversity and evenness indices（H＇ and E） indicated that long-term inorganic fertil

关键词： long-term fertilization regimes organic amendment soil microbial community structure microbial functional metabolic activity carbon substrate utilization

Modeling motion and growth of multiple dendrites during solidification based on vector-valued phase field and two-phase flow models

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第23期58卷 171-187页

作者： jian-kun ren Yun Chen yan-fei Cao Ming-yue Sun Bin Xu Dian-zhong li Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Movement and growth of dendrites are common phenomena during *** numerically investigate these phenomena,two-phase flow model is employed to formulate the FSI(fluid-structure interaction)problem during dendritic *** this model,solid is assumed to have huge viscosity to maintain its own shape and an exponential expression is constructed to describe variable viscosity across s-l(solid-liquid)*** an effective preconditioner for saddle point structure,we build a N-S(Navier-Stokes)solver robust to tremendous viscosity ratio(as large as 10^(10))between solid and *** solidification is computed by vector-valued phase field model,which is computationally convenient to handle contact between *** of dendrites are updated by solving advection *** change due to dendrite's rotation has been considered as *** is accelerated by two-level time stepping scheme,adaptive mesh refinement,and parallel *** and growth of a single dendrite and multiple dendrites in Al-Cu alloy were simulated,showing the availability of the provided model to handle anisotropic growth,motion and impingement of *** study lays foundation to simulate solidification coupled with deformation in the future.

关键词： Phase field Solidification Two-phase flow Dendrite's motion Variable viscosity

Deformation behavior and microstructure of an Al-Zn-Mg-Cu-Zr alloy during hot deformation

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2010年第1期17卷 46-52页

作者： liang-ming yan jian Shen Jun-peng li Zhou-bing li Xiao-dong yan General Research Institute for Nonferrous Metals Beijing 100088 China

The hot deformation behavior and microstructures of Al-7055 commercial alloy were investigated by axisymmetric hot compres- sion at temperatures ranging from 300℃ to 450℃ and strain rates from 10^-2 to 10 s^-1, respectively. Microstructures of deformed 7055 alloy were investigated by transmission electron microscopy （TEM）. The dependence of peak stress on deformation temperature and strain rate can be expressed by the hyperbolic-sine type equation. The hot deformation activation energy of the alloy is 146 kJ/mol. Moreover, the flow stress curves predicted by the modified constitutive equations are reasonably consistent with the experimental results, which confirms that the proposed deformation constitutive equations can provide evidence for the selection of hot forming parameters. TEM results indicate that dy- namic recovery is the main softening mechanism during hot deformation.

关键词： aluminum alloys dynamic recovery hot compression deformation behavior constitutive equation

在线全文

学校读者我要写书评

暂无评论

使用光谱分析实现弯管中两相流含气率的预测

光谱学与光谱分析 2025年第1期45卷 231-238页

作者：车少敏马世一刘雪婧殷雄周延熊兵李锟李飞西安交通大学能源与动力工程学院陕西西安710049 中国航发四川燃气涡轮研究院四川成都610500 西安石油大学电子工程学院陕西西安710065

空气被夹带进入发动机润滑油系统形成油气两相流后,会严重影响润滑系统的正常运行。因此实现发动机润滑油系统中油气两相流含气率的准确和快速测量具有十分重要的意义。基于光谱匹配方法,对发动机润滑油系统在弯管处的油气两相流含气率... 详细信息

空气被夹带进入发动机润滑油系统形成油气两相流后,会严重影响润滑系统的正常运行。因此实现发动机润滑油系统中油气两相流含气率的准确和快速测量具有十分重要的意义。基于光谱匹配方法,对发动机润滑油系统在弯管处的油气两相流含气率进行了测量研究。首先使用近红外、可见光和紫外光谱仪获取油气两相流在2个流速、5个温度工况下0.10%~1.00%含气率范围(间隔0.06%)的吸光度数据并进行分析,确认油气两相流在三个波段下均有吸收,且吸收强度与含气率有关;其次提出将数据预处理结合光谱相似性测度方法并应用于弯管含气率光谱分析中,显著降低了基于原始光谱的含气率预测的最大相对误差。在近红外波段通过使用数据增强方法如中心化(center)和标准化(autoscaling)并结合光谱角余弦方法,得出新润滑油的含气率最大相对误差相对于原始光谱得到的数值从48%降低到36%。利用该方法分别在三个波段进行含气率预测,试验工况包括2个流速、5个温度,分析了两相流的温度和流速对含气率预测的影响。温度30.0℃,流速5.1 m·min^(-1)下,含气率信息在紫外波段(193.5~413.8 nm)与光谱向量的方向或形状差异的联系更为紧密,含气率预测的最大相对误差仅为6%。在近红外和可见光波段,流速或温度一定时,最大相对误差随着温度或流速的增加均有减小趋势。紫外波段下温度对含气率预测效果没有特定的影响规律,随着两相流的流速增加,含气率预测的最大相对误差有增大趋势。结果表明对于透光性较好的新润滑油,使用紫外光谱仪进行含气率数据的采集,含气率的预测选用标准化预处理结合光谱角余弦方法,得到的含气率预测最大相对误差最小。

关键词：气液两相流含气率光谱分析光谱匹配

Convergent relationships between flower economics and hydraulic traits across aquatic and terrestrial herbaceous plants

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2023年第5期45卷 601-610页

作者： yan Ke Feng-Ping Zhang Yun-bing Zhang Wei li Qin Wang Da yang Jiao-lin Zhang kun-Fang Cao CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglaYunnan 666303China University of Chinese Academy of Sciences Beijing 100049China College of Traditional Chinese Medicine Yunnan University of Chinese MedicineKunmingYunnan 650500China School of Biological and Chemical Sciences Puer UniversityPuerYunnan 665000China State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources Guangxi Key Laboratory of Forest Ecology and ConservationGuangxi UniversityDaxuedong Road 100NanningGuangxi 530004China

Maintaining open flowers is critical for successful pollination and depends on long-term water and carbon *** the relationship between how flower hydraulic traits are coordinated in different habitats is poorly ***,we hypothesize that the coordination and trade-offs between floral hydraulics and economics traits are independent of environmental *** test this hypothesis,we investigated a total of 27 flower economics and hydraulic traits in six aquatic and six terrestrial herbaceous species grown in a tropical botanical *** found that although there were a few significant differences,most flower hydraulics and economics traits did not differ significantly between aquatic and terrestrial herbaceous *** flower mass per area and floral longevity were significantly positively correlated with the time required for drying full-hydrated flowers to 70%relative water *** dry matter content was strongly and positively related to drought tolerance of the flowers as indicated by flower water potential at the turgor loss *** addition,there was a trade-off between hydraulic efficiency and the construction cost of a flower across *** results show that flowers of aquatic and terrestrial plants follow the same economics spectrum *** results suggest a convergent flower economics design across terrestrial and aquatic plants,providing new insights into the mechanisms by which floral organs adapt to aquatic and terrestrial habitats.

关键词： Aquatic plants Floral longevity Flower economics traits Flower hydraulic traits Terrestrial plants

Comparative analysis of different feeder layers with 3T3 fibroblasts for culturing rabbits limbal stem cells

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2017年第7期10卷 1021-1027页

作者： Hui-Xian Wang Xiao-Wei Gao bing ren yan Cai Wen-Jing li Yu-li yang Yi-jian li Medical College of Shihezi University Ophthalmic Center No.474 Hospital of Chinese PLA Southwest Hospital Third Military Medical University

AIM： To explore the possibility of human umbilical cord mesenchymal stem cells（h UCMSCs）, human umbilical vein endothelial cells（h UVECs）, human dental pulp stem cells（h DPSCs） and human periodontal ligament stem cells（h PDLSCs） serving as feeder cells in co-culture systems for the cultivation of limbal stem ***： Different feeder layers were cultured in Dulbecco＇s modified Eagle＇s medium（DMEM）/F12 and were treated with mitomycin C. Rabbits limbal stem cells（LSCs） were co-cultured on h UCMSCs, h UVECs, h DPSCs, h PDLSCs and NIH-3T3, and then comparative analysis were made between each group to see their respective colony-forming efficiency（CFE） assay and immunofluorescence（IPO13,CK3/12）.RESULTS： The efficiency of the four type cells in supporting the LSCs morphology and its cellular differentiation was similar to that of NIH-3T3 fibroblasts as demonstrated by the immunostaining properties analysis, with each group exhibiting a similar strong expression pattern of IPO13, but lacking CK3 and CK12 expression in terms of immunostaining. But h UCMSCs, h DPSCs and h PDLSCs feeder layers were superior in promoting colony formation potential of cells when compared to h UVECs and feedercell-free ***： hUCMSCs, hDPSCs and hPDLSCs can be a suitable alternative to conventional mouse NIH-3T3 feeder cells, so that risk of zoonotic infection can be diminished.

关键词： limbal stem cells feeder layers umbilical cord mesenchymal stem cells umbilical vein endothelial cells dental pulp stem cells periodontal ligament stem cells