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Search Results: 1 - 10 of 80890 matches for " Jiannong Liu "
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An Energy-Aware Routing Protocol in Wireless Sensor Networks
Ming Liu,Jiannong Cao,Guihai Chen,Xiaomin Wang
Sensors , 2009, DOI: 10.3390/s90100445
Abstract: The most important issue that must be solved in designing a data gathering algorithm for wireless sensor networks (WSNS) is how to save sensor node energy while meeting the needs of applications/users. In this paper, we propose a novel energy-aware routing protocol (EAP) for a long-lived sensor network. EAP achieves a good performance in terms of lifetime by minimizing energy consumption for in-network communications and balancing the energy load among all the nodes. EAP introduces a new clustering parameter for cluster head election, which can better handle the heterogeneous energy capacities. Furthermore, it also introduces a simple but efficient approach, namely, intra-cluster coverage to cope with the area coverage problem. We use a simple temperature sensing application to evaluate the performance of EAP and results show that our protocol significantly outperforms LEACH and HEED in terms of network lifetime and the amount of data gathered.
Associations of anemia persistency with medical expenditures in Medicare ESRD patients on dialysis
Jiannong Liu, Haifeng Guo, David Gilbertson, Robert Foley, et al.
Therapeutics and Clinical Risk Management , 2009, DOI: http://dx.doi.org/10.2147/TCRM.S4856
Abstract: ssociations of anemia persistency with medical expenditures in Medicare ESRD patients on dialysis Original Research (3635) Total Article Views Authors: Jiannong Liu, Haifeng Guo, David Gilbertson, Robert Foley, et al. Published Date April 2009 Volume 2009:5 Pages 319 - 330 DOI: http://dx.doi.org/10.2147/TCRM.S4856 Jiannong Liu1, Haifeng Guo1, David Gilbertson1, Robert Foley1,2, Allan Collins1,2 1Chronic Disease Research Group, Minneapolis Medical Research Foundation, Minneapolis, MN, USA; 2Department of Medicine, University of Minnesota, Minneapolis, MN, USA Abstract: Most end-stage renal disease (ESRD) patients begin renal replacement therapy with hemoglobin levels below the recommended US National Kidney Foundation Dialysis Outcomes Quality Initiative Guidelines lower level of 110 g/L. Although most patients eventually reach this target, the time required varies substantially. This study aimed to determine whether length of time with below-target hemoglobin levels after dialysis initiation is associated with medical costs, and if so, whether intermediate factors underlie the associations. US patients initiating dialysis in 2002 were studied using the Centers for Medicare and Medicaid Services ESRD database. Anemia persistence (time in months with hemoglobin below 110 g/L) was determined in a six-month entry period, and outcomes were assessed in the subsequent six-month follow-up period. The structural equation modeling technique was used to evaluate associations between persistent anemia and medical costs and to determine intermediate factors for these associations. The study included 28,985 patients. Mean per-patient-per-month medical cost was $6267 (standard deviation $5713) in the six-month follow-up period. Each additional month with hemoglobin below 110 g/L was associated with an 8.9% increment in medical cost. The increased cost was associated with increased erythropoietin use and blood transfusions, and increased rates of hospitalization and vascular access procedures in the follow-up period.
Investigation on the Microstructure Homogenization in a TiAl Based Alloy Prepared by Elemental Powder Metallurgy
Yong LIU,Baiyun HUANG,Yuehui HE,Jiannong WANG,

材料科学技术学报 , 1999,
Abstract: 1.IntroductionTiAlbasedalloyhasdrawnintensiveattentioninhightemperaturestructuralmaterialarea,be-causeofitslowdensity,excellellthightemperaturepropertiesf1~2].However,itspoorworkabilityisanobstacleforitsapplication.Inordertoovercomethisdifficulty,extensiveworkhasbeenconductedtoim-proveitsworkabi1ityandnearnetshaping.Elementalpowdermetallurgy(EPM)hasbeenusedforfabricatingTiAl-basedalloys,becauseofitstwoapparentadvantages'lowcostandconvenientad-ditionofalloyelemellts3].Thistechniqueincludesr…
Associations of anemia persistency with medical expenditures in Medicare ESRD patients on dialysis
Jiannong Liu,Haifeng Guo,David Gilbertson,Robert Foley
Therapeutics and Clinical Risk Management , 2009,
Abstract: Jiannong Liu1, Haifeng Guo1, David Gilbertson1, Robert Foley1,2, Allan Collins1,21Chronic Disease Research Group, Minneapolis Medical Research Foundation, Minneapolis, MN, USA; 2Department of Medicine, University of Minnesota, Minneapolis, MN, USAAbstract: Most end-stage renal disease (ESRD) patients begin renal replacement therapy with hemoglobin levels below the recommended US National Kidney Foundation Dialysis Outcomes Quality Initiative Guidelines lower level of 110 g/L. Although most patients eventually reach this target, the time required varies substantially. This study aimed to determine whether length of time with below-target hemoglobin levels after dialysis initiation is associated with medical costs, and if so, whether intermediate factors underlie the associations. US patients initiating dialysis in 2002 were studied using the Centers for Medicare and Medicaid Services ESRD database. Anemia persistence (time in months with hemoglobin below 110 g/L) was determined in a six-month entry period, and outcomes were assessed in the subsequent six-month follow-up period. The structural equation modeling technique was used to evaluate associations between persistent anemia and medical costs and to determine intermediate factors for these associations. The study included 28,985 patients. Mean per-patient-per-month medical cost was $6267 (standard deviation $5713) in the six-month follow-up period. Each additional month with hemoglobin below 110 g/L was associated with an 8.9% increment in medical cost. The increased cost was associated with increased erythropoietin use and blood transfusions, and increased rates of hospitalization and vascular access procedures in the follow-up period. Keywords: anemia persistency, end-stage renal disease, medical costs, structural equation modeling
The relationship between EEG band power, cognitive processing and intelligence in school-age children
TONGRAN LIU,JIANNONG SHI,DAHENG ZHAO,JIE YANG
Psychology Science Quarterly , 2008,
Abstract: To investigate the differences in event-related potential parameters related to children’s intelligence and cognitive ability, 24 individuals from an experimental class of intellectually gifted children and 23 intellectually average children as the control group from a regular class were selected in the present study and the main neural mechanism pertaining to high intelligence was investigated. The electroen-cephalogram (EEG) was recorded and the relationship between different percentages of Delta, Theta, Alpha1, Alpha2, Beta1 and Beta2 and intelligence and cognitive ability were analyzed. The results suggested that Delta power activity in brighter individuals was more than that in normal individuals, and Alpha2 and Beta1 power activity in higher intelligence individuals were less than that in normal individuals. In high ability group, Alpha1 was significantly correlated with visual search ability, and Theta band correlated with simple abstract matching significantly. While in the normal group, Delta band related significantly with short term memory abilities. Spectral EEG parameters could be regarded as neural bases for fast reaction and a good tool to discriminate high intelligent children from the average.
Design, Implementation, and Evaluation of Wireless Sensor Network Systems
Liu Jiangchuan,Cao Jiannong,Li Xiang-Yang,Sun Limin
EURASIP Journal on Wireless Communications and Networking , 2010,
Abstract:
Design, Implementation, and Evaluation of Wireless Sensor Network Systems
Jiangchuan Liu,Jiannong Cao,Xiang-Yang Li,Limin Sun
EURASIP Journal on Wireless Communications and Networking , 2010, DOI: 10.1155/2010/439890
Abstract:
Metabonomics analysis of the urine of rats with Qi deficiency and blood stasis syndrome based on NMR techniques
Lin Li,JianNong Wang,JianXun Ren,JunFeng Xiang,YaLin Tang,JianXun Liu,Ding Han
Chinese Science Bulletin , 2007, DOI: 10.1007/s11434-007-0389-4
Abstract: Metabonomics analysis of the urine of rats with Qi deficiency and blood stasis syndrome has been performed by comparison with those of normal rats based on NMR techniques. The relative contents of formate, creatinine, 2-oxoglutarate (2-OG), citrate, taurine, trimethylamine-N-oxide(TMAO), succinate and hippurate in the urine of the rats with Qi deficiency and blood stasis syndrome have been changed. These results have provided evidence for understanding the mechanism and the therapy of Qi deficiency and blood stasis syndrome.
THE RELATIONS BETWEEN INSPECTION TIME AND INTELLIGENCE OF CHILDREN
儿童的检测时与智力

Liu Zhengkui,Shi Jiannong,Cheng li,
刘正奎
,施建农,程黎

心理学报 , 2003,
Abstract: Studied the relationship between intelligence test performance and 3 visual inspection time measures including classical line inspection time, digital inspection time and component of Chinese character inspection time. 84 children, including 7 year olds, 9 year olds and 11 year olds, attended the test for 3 kinds of inspection time, all subjects also completed the Cattell's culture free test. Results indicated that inspection time in various tasks all showed trends of decreasing with increasing of ages. However, there were different speed of processing and change of development in the different tasks: the digital inspection time was longest in all tasks and the component of Chinese character inspection time was the shortest. From 7 year olds to 11 year olds, the line inspection time decreased slowly, while digital inspection time decreased quickly. No differences had been found between the sexes in different inspection time tasks. Experiments had showed that although inspection time of children is moderately correlated with intelligence test scores, the strength of the correlation between inspection time of children and intelligence test scores is attenuated relatively after controlling age factor. Correlation between inspection time of children and intelligence test scores is influenced by different inspection time tasks: digital inspection time task is sensitive to age variance, while line inspection time task is sensitive to within-group variance. Experiments also displayed correlation between faster inspection time groups, slower inspection time groups and intelligence test scores. Results showed that slower inspection time of children was significantly correlated with intelligence test scores, while faster inspection time of children and intelligence test scores were unrelated after controlling age factor.This finding suggested that worst performance (i.e., slower inspection time ) was a better predictor of IQ than best performance ( i.e. , faster inspection time).
A REVIEW OF RESEARCHES ON INSPECTION TIME AND INTELLIGENCE
检测时与智力关系的研究述评

Liu Zhengkui,Shi Jiannong,
刘正奎
,施建农

心理科学进展 , 2003,
Abstract: Inspection time (IT) is an important index of human information processing, and IT has been shown to correlate reliably with general intelligence. A common interpretation of this pattern has been that IT provides an index of a cognitive or biological substrate underpinning individual difference in IQ. The article first introduced the correlative studies between IT and IQ, discussed different theoretical explanation on the nature of correlation between IT and IQ, and then summarized the studies of the nature of correlation nature between IT and IQ from the viewpoint of biology and development. Some problems pertaining studies in this field are highlighted, and new orientation is discussed in the article.
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