In this paper,a new quasi-interpolation with radial basis functions which satis- fies quadratic polynomial reproduction is constructed on the infinite set of equally spaced data.A new basis function is constructed by ...In this paper,a new quasi-interpolation with radial basis functions which satis- fies quadratic polynomial reproduction is constructed on the infinite set of equally spaced data.A new basis function is constructed by making convolution integral with a constructed spline and a given radial basis function.In particular,for twicely differ- entiable function the proposed method provides better approximation and also takes care of derivatives approximation.展开更多
In the cloud age, heterogeneous application modes on large-scale infrastructures bring about the chal- lenges on resource utilization and manageability to data cen- ters. Many resource and runtime management systems a...In the cloud age, heterogeneous application modes on large-scale infrastructures bring about the chal- lenges on resource utilization and manageability to data cen- ters. Many resource and runtime management systems are developed or evolved to address these challenges and rele- vant problems from different perspectives. This paper tries to identify the main motivations, key concerns, common fea- tures, and representative solutions of such systems through a survey and analysis. A typical kind of these systems is gener- alized as the consolidated cluster system, whose design goal is identified as reducing the overall costs under the quality of service premise. A survey on this kind of systems is given, and the critical issues concerned by such systems are sum- marized as resource consolidation and runtime coordination. These two issues are analyzed and classified according to the design styles and external characteristics abstracted from the surveyed work. Five representative consolidated cluster systems from both academia and industry are illustrated and compared in detail based on the analysis and classifications. We hope this survey and analysis to be conducive to both de- sign implementation and technology selection of this kind of systems, in response to the constantly emerging challenges on infrastructure and application management in data centers.展开更多
Background:Schistosomiasis japonica is a common zoonosis.Domestic animals are the primary source of infection and play an important role in disease transmission.The prevalence and infectivity of this disease in domest...Background:Schistosomiasis japonica is a common zoonosis.Domestic animals are the primary source of infection and play an important role in disease transmission.The prevalence and infectivity of this disease in domestic animals in China have significantly decreased and,for this reason,diagnostics with a higher sensitivity have become increasingly necessary.It was reported that polymerase chain reaction(PCR)-based methods could be used to detect schistosome infection in humans and animals and presented a high sensitivity and specificity.The present study aimed to develop a PCR-based method for detection of Schistosoma japonicum infection in domestic animals.Methods:A specific nested-PCR assay was developed to detect S.japonicum infection in domestic animals via amplification of a 231-bp DNA fragment of retrotransposon SjR2.The developed assay was first used in sera and dry blood filter paper(DBFP)from goats and buffaloes at different time points of infection.Then,78 DBFPs from 39 artificially-infected bovines at 14 and 28 days post-infection and 42 DBFPs from schistosome-negative bovines from the city of Huangshan in the Anhui province were used to evaluate the diagnostic validity.Furthermore,this assay was used to detect S.japonicum infection in domestic animals in Dongzhi and Wangjiang counties.Results:The expected PCR product was detected in eggs and adult worms of S.japonicum and blood samples from S.japonicum-infected goats and water buffaloes,but not from Fasciola and Haemonchus contortus worms.The nested-PCR assay could detect the target S.japonicum DNA in DBFPs from goats and buffaloes after day 3 post-infection.The sensitivity in buffaloes at 14 and 28 days post-infection was 92.30%(36/39)and 100%(39/39),respectively.The specificity was 97.60%(41/42).The positivity rates in Dongzhi and Wangjiang counties were 6.00%and 8.00%in bovines and 22.00%and 16.67%in goats,respectively.The positivity rates in goats in both counties were higher than those in bovines with a significant difference in Dongzhi County but not in Wangjiang County(P<0.05 and P=0.23,respectively).Conclusions:Our results suggest that the developed nested-PCR assay may be used for the diagnosis of S.japonicum infection in domestic animals,and the control of S.japonicum infection in goats should be paid more attention.展开更多
This paper presents CirroData,a high-performance SQL-on-Hadoop system designed for Big Data analytics workloads.As a home-grown enterprise-level online analytical processing(OLAP)system with more than seven-year resea...This paper presents CirroData,a high-performance SQL-on-Hadoop system designed for Big Data analytics workloads.As a home-grown enterprise-level online analytical processing(OLAP)system with more than seven-year research and development(R&D)experiences,we share our design details to the community about how to achieve high performance in CirroData.Multiple optimization techniques have been discussed in the paper.The effectiveness and the efficiency of all these techniques have been proved by our customers'daily usage.Benchmark-level studies,as well as several real application case studies of CirroData,have been presented in this paper.Our evaluations show that CirroData can outperform various types of counterpart database systems in the community,such as"Spark+Hive","Spark+HBase",Impala,DB-X/Y,Greenplum,HAWQ,and others.CirroData can achieve up to 4.99x speedup compared with Greenplum,HAWQ,and Spark in the standard TPC-H queries.Application-level evaluations demonstrate that CirroData outperforms"Spark+Hive"and"Spark+HBase"by up to 8.4x and 38.8x,respectively.In the meantime,CirroData achieves the performance speedups for some application workloads by up to 20x,100x,182.5x,92.6x,and 55.5x as compared with Greenplum,DB-X,Impala,DB-Y,and HAWQ,respectively.展开更多
文摘In this paper,a new quasi-interpolation with radial basis functions which satis- fies quadratic polynomial reproduction is constructed on the infinite set of equally spaced data.A new basis function is constructed by making convolution integral with a constructed spline and a given radial basis function.In particular,for twicely differ- entiable function the proposed method provides better approximation and also takes care of derivatives approximation.
文摘In the cloud age, heterogeneous application modes on large-scale infrastructures bring about the chal- lenges on resource utilization and manageability to data cen- ters. Many resource and runtime management systems are developed or evolved to address these challenges and rele- vant problems from different perspectives. This paper tries to identify the main motivations, key concerns, common fea- tures, and representative solutions of such systems through a survey and analysis. A typical kind of these systems is gener- alized as the consolidated cluster system, whose design goal is identified as reducing the overall costs under the quality of service premise. A survey on this kind of systems is given, and the critical issues concerned by such systems are sum- marized as resource consolidation and runtime coordination. These two issues are analyzed and classified according to the design styles and external characteristics abstracted from the surveyed work. Five representative consolidated cluster systems from both academia and industry are illustrated and compared in detail based on the analysis and classifications. We hope this survey and analysis to be conducive to both de- sign implementation and technology selection of this kind of systems, in response to the constantly emerging challenges on infrastructure and application management in data centers.
基金This study was supported by research funds provided by the Special Fund for Agro-scientific Research in the Public Interest(grant No.201303037)the National Natural Science Foundation of China(grant No.31572218)the Scientific and Technological Innovation Program of the Chinese Academy of Agricultural Sciences。
文摘Background:Schistosomiasis japonica is a common zoonosis.Domestic animals are the primary source of infection and play an important role in disease transmission.The prevalence and infectivity of this disease in domestic animals in China have significantly decreased and,for this reason,diagnostics with a higher sensitivity have become increasingly necessary.It was reported that polymerase chain reaction(PCR)-based methods could be used to detect schistosome infection in humans and animals and presented a high sensitivity and specificity.The present study aimed to develop a PCR-based method for detection of Schistosoma japonicum infection in domestic animals.Methods:A specific nested-PCR assay was developed to detect S.japonicum infection in domestic animals via amplification of a 231-bp DNA fragment of retrotransposon SjR2.The developed assay was first used in sera and dry blood filter paper(DBFP)from goats and buffaloes at different time points of infection.Then,78 DBFPs from 39 artificially-infected bovines at 14 and 28 days post-infection and 42 DBFPs from schistosome-negative bovines from the city of Huangshan in the Anhui province were used to evaluate the diagnostic validity.Furthermore,this assay was used to detect S.japonicum infection in domestic animals in Dongzhi and Wangjiang counties.Results:The expected PCR product was detected in eggs and adult worms of S.japonicum and blood samples from S.japonicum-infected goats and water buffaloes,but not from Fasciola and Haemonchus contortus worms.The nested-PCR assay could detect the target S.japonicum DNA in DBFPs from goats and buffaloes after day 3 post-infection.The sensitivity in buffaloes at 14 and 28 days post-infection was 92.30%(36/39)and 100%(39/39),respectively.The specificity was 97.60%(41/42).The positivity rates in Dongzhi and Wangjiang counties were 6.00%and 8.00%in bovines and 22.00%and 16.67%in goats,respectively.The positivity rates in goats in both counties were higher than those in bovines with a significant difference in Dongzhi County but not in Wangjiang County(P<0.05 and P=0.23,respectively).Conclusions:Our results suggest that the developed nested-PCR assay may be used for the diagnosis of S.japonicum infection in domestic animals,and the control of S.japonicum infection in goats should be paid more attention.
基金This research is supported in part by the Strategic Priority Research Program of the Chinese Academy of Sciences of China under Grant No.XDA19020400.
文摘This paper presents CirroData,a high-performance SQL-on-Hadoop system designed for Big Data analytics workloads.As a home-grown enterprise-level online analytical processing(OLAP)system with more than seven-year research and development(R&D)experiences,we share our design details to the community about how to achieve high performance in CirroData.Multiple optimization techniques have been discussed in the paper.The effectiveness and the efficiency of all these techniques have been proved by our customers'daily usage.Benchmark-level studies,as well as several real application case studies of CirroData,have been presented in this paper.Our evaluations show that CirroData can outperform various types of counterpart database systems in the community,such as"Spark+Hive","Spark+HBase",Impala,DB-X/Y,Greenplum,HAWQ,and others.CirroData can achieve up to 4.99x speedup compared with Greenplum,HAWQ,and Spark in the standard TPC-H queries.Application-level evaluations demonstrate that CirroData outperforms"Spark+Hive"and"Spark+HBase"by up to 8.4x and 38.8x,respectively.In the meantime,CirroData achieves the performance speedups for some application workloads by up to 20x,100x,182.5x,92.6x,and 55.5x as compared with Greenplum,DB-X,Impala,DB-Y,and HAWQ,respectively.