In this paper, a novel Home Location Register(HLR) mobility database recovery scheme is proposed. With database backing-up and signal sending as its key processes, the presented scheme is designed for the purpose of b...In this paper, a novel Home Location Register(HLR) mobility database recovery scheme is proposed. With database backing-up and signal sending as its key processes, the presented scheme is designed for the purpose of both decreasing system costs and reducing number of lost calls. In our scheme, an algorithm is developed for an HLR to identify such VLRs that there are new MSs roaming into them since the latest HLR database backing up. The identification of those VLRs is used by the HLR to send Unreliable Roaming Data Directive messages to each of them to get the correct location information of those new MSs. Additionally, two kinds of relationships, one between the number of lost calls and the database backing-up period and the other between the backing-up cost and the period, are well analyzed. Both analytical and numerical results indicate that there will be an optimal HLR database backing-up period if certain system parameters are given and the total cost can be consequently minimized.展开更多
Based on the kairomone from the accessory gland of female Bombyx mori elicting the parasitoid, Telenomus theophilae, to parasitize artifical beads. A cDNA expression library of enrich kairomone gene was constr...Based on the kairomone from the accessory gland of female Bombyx mori elicting the parasitoid, Telenomus theophilae, to parasitize artifical beads. A cDNA expression library of enrich kairomone gene was constructed using mRNA rich secretory portion of the accessory glands of B. mori at the 9 day old of pupa. The titer of the unamplified library was 3.29×10 4 pfu/μL with a recombinant rate of 90.05%, and titer of amplified library was 1.56×10 7 pfu/μL. The inserted cDNA fragments of the library ranged from 0.5 to 8.0 kb and concentrated around the 2.5 kb, 1.1kb, and 0.75kb regions. All of the data suggest that the library has appropriate titer and high frequency kairomone gene fragments by using special developing stage and tissue of B. mori to extract mRNA. Directional cloning and λZiplox expression were help to clone the kairomone gene with immunoscreening.展开更多
The leaf economic spectrum(LES)quantifes correlations between key leaf traits across vascular plants and distills much of the variation in these traits to a single axis.The LES,remarkable in its near universality,has ...The leaf economic spectrum(LES)quantifes correlations between key leaf traits across vascular plants and distills much of the variation in these traits to a single axis.The LES,remarkable in its near universality,has been extensively researched across a variety of contexts.However,parasitic plants relationship to the LES framework remains relatively unexplored.Because the LES is,in part,driven by physiological tradeoffs in the acquisition of carbon(C),in theory heterotrophy in parasitic plants,which supplants some of the essential functions of leaves,could lead to departures from the LES.Using global leaf trait data from the TRY database,this work assessed the overall representation of parasitic plants in the TRY database,then compared the LES suite of leaf traits in parasitic plants to their non-parasitic counterparts.Despite their unique physiology,parasitic plants did not deviate dramatically from the LES,although there were examples of differences in position on the LES and relationships among traits.Perhaps more importantly,parasitic plants are not well represented in the TRY database,making any conclusions here premature.展开更多
基金the National 863 Program(No.MII-C3G-02-20/863-317-03-01-02-20)
文摘In this paper, a novel Home Location Register(HLR) mobility database recovery scheme is proposed. With database backing-up and signal sending as its key processes, the presented scheme is designed for the purpose of both decreasing system costs and reducing number of lost calls. In our scheme, an algorithm is developed for an HLR to identify such VLRs that there are new MSs roaming into them since the latest HLR database backing up. The identification of those VLRs is used by the HLR to send Unreliable Roaming Data Directive messages to each of them to get the correct location information of those new MSs. Additionally, two kinds of relationships, one between the number of lost calls and the database backing-up period and the other between the backing-up cost and the period, are well analyzed. Both analytical and numerical results indicate that there will be an optimal HLR database backing-up period if certain system parameters are given and the total cost can be consequently minimized.
文摘Based on the kairomone from the accessory gland of female Bombyx mori elicting the parasitoid, Telenomus theophilae, to parasitize artifical beads. A cDNA expression library of enrich kairomone gene was constructed using mRNA rich secretory portion of the accessory glands of B. mori at the 9 day old of pupa. The titer of the unamplified library was 3.29×10 4 pfu/μL with a recombinant rate of 90.05%, and titer of amplified library was 1.56×10 7 pfu/μL. The inserted cDNA fragments of the library ranged from 0.5 to 8.0 kb and concentrated around the 2.5 kb, 1.1kb, and 0.75kb regions. All of the data suggest that the library has appropriate titer and high frequency kairomone gene fragments by using special developing stage and tissue of B. mori to extract mRNA. Directional cloning and λZiplox expression were help to clone the kairomone gene with immunoscreening.
基金supported by the Department of Integrative Biology at University of California Berkeley.
文摘The leaf economic spectrum(LES)quantifes correlations between key leaf traits across vascular plants and distills much of the variation in these traits to a single axis.The LES,remarkable in its near universality,has been extensively researched across a variety of contexts.However,parasitic plants relationship to the LES framework remains relatively unexplored.Because the LES is,in part,driven by physiological tradeoffs in the acquisition of carbon(C),in theory heterotrophy in parasitic plants,which supplants some of the essential functions of leaves,could lead to departures from the LES.Using global leaf trait data from the TRY database,this work assessed the overall representation of parasitic plants in the TRY database,then compared the LES suite of leaf traits in parasitic plants to their non-parasitic counterparts.Despite their unique physiology,parasitic plants did not deviate dramatically from the LES,although there were examples of differences in position on the LES and relationships among traits.Perhaps more importantly,parasitic plants are not well represented in the TRY database,making any conclusions here premature.
