The paper proposes a novel hardware-based private information retrieval （HWPIR） protocol. By partially reshuffling previously accessed items in each round, instead of frequently reshuffling the whole database, the s...The paper proposes a novel hardware-based private information retrieval （HWPIR） protocol. By partially reshuffling previously accessed items in each round, instead of frequently reshuffling the whole database, the scheme makes better use of shuffled data copies and achieves the computation overhead at O（/N/K）,where N and k are the sizes of the database and secure storage respectively. For securestorage with moderate size, e.g. k = O（/N）, the overhead is 0（4/N）. The result is much better than the state-of-art schemes （as compared to e.g. O（log2N））. Without increasing response time and communication cost, the proposed protocol is truly practicable regardless of the database size. The security and preformance of the protocol is formally analyzed.展开更多
Reorganization of CAS institutes was conducted over the past four years. For example, with the merger of the former Institute of Mathematics,Institute of Applied Mathematics, Institute of Systems Science and Insti... Reorganization of CAS institutes was conducted over the past four years. For example, with the merger of the former Institute of Mathematics,Institute of Applied Mathematics, Institute of Systems Science and Institute of Computational Mathematics & Scientific/Engineering Computing, an Academy of Mathematics & System Sciences was formed. In the Shanghai area, the eight former biological institutes was regrouped into four institutes and one center,which formed the newly established Shanghai Institutes for Biological Sciences.……展开更多
What it means for China's economy... Last month, the Chinese Government made sweeping changes to the export tax breaks that domestic companies receive. Here's what happened: On September 14, the Ministry of Fi...What it means for China's economy... Last month, the Chinese Government made sweeping changes to the export tax breaks that domestic companies receive. Here's what happened: On September 14, the Ministry of Finance, the General Administration of Customs, the National Development and Reform Commission, the Ministry展开更多
Durian(Durio zibethinus)is a tropical fruit that has a unique flavor and aroma.It occupies a significant phylogenetic position within the Malvaceae family.Extant core-eudicot plants are reported to share seven ancestr...Durian(Durio zibethinus)is a tropical fruit that has a unique flavor and aroma.It occupies a significant phylogenetic position within the Malvaceae family.Extant core-eudicot plants are reported to share seven ancestral karyotypes that have undergone reshuffling,resulting in an abundant genomic diversity.However,the ancestral karyotypes of the Malvaceae family,as well as the evolution trajectory leading to the28 chromosomes in durian,remain poorly understood.Here,we report the high-quality assembly of the durian genome with comprehensive comparative genomic analyses.By analyzing the collinear blocks between cacao and durian,we inferred 11 Malvaceae ancestral karyotypes.These blocks were present in a single-copy form in cacao and mainly in triplicates in durian,possibly resulting from a recent whole genome triplication(WGT)event that led to hexaploidization of the durian genome around 20(17–24)million years ago.A large proportion of the duplicated genes in durian,such as those involved in the lignin biosynthesis module for phenylpropane biosynthesis,are derived directly from whole genome duplication,which makes it an important force in reshaping its genomic architecture.Transcriptome studies have revealed that genes involved in feruloyl-Co A formations were highly preferentially expressed in fruit peels,indicating that the thorns produced on durian fruit may comprise guaiacyl and syringyl lignins.Among all the analyzed transcription factors(TFs),members of the heat shock factor family(HSF)were the most significantly upregulated under heat stress.All subfamilies of genes encoding heat shock proteins(HSPs)in the durian genome appear to have undergone expansion.The potential interactions between HSF Dzi05.397 and HSPs were examined and experimentally verified.Our study provides a high-quality durian genome and reveals the reshuffling mechanism of ancestral Malvaceae chromosomes to produce the durian genome.We also provide insights into the mechanism underlying lignin biosynthesis and heat stress tolerance.展开更多
Boosted by a booming e-commerce industry, the courier sector has seen fast growth over the past few years, with the number of handled parcels increasing by 10 billion on average in each of the past three years, accord...Boosted by a booming e-commerce industry, the courier sector has seen fast growth over the past few years, with the number of handled parcels increasing by 10 billion on average in each of the past three years, according to the State Post Bureau (SPB). Agures from the National Bureau of Statistics showed that the industry handled a total of 50.71 billion parcels in 2018, up 26.6 percent from the previous year, while total revenue grew 21.8 percent year on year to 603.84 billion yuan ($88.8 billion).展开更多
文摘The paper proposes a novel hardware-based private information retrieval （HWPIR） protocol. By partially reshuffling previously accessed items in each round, instead of frequently reshuffling the whole database, the scheme makes better use of shuffled data copies and achieves the computation overhead at O（/N/K）,where N and k are the sizes of the database and secure storage respectively. For securestorage with moderate size, e.g. k = O（/N）, the overhead is 0（4/N）. The result is much better than the state-of-art schemes （as compared to e.g. O（log2N））. Without increasing response time and communication cost, the proposed protocol is truly practicable regardless of the database size. The security and preformance of the protocol is formally analyzed.
文摘 Reorganization of CAS institutes was conducted over the past four years. For example, with the merger of the former Institute of Mathematics,Institute of Applied Mathematics, Institute of Systems Science and Institute of Computational Mathematics & Scientific/Engineering Computing, an Academy of Mathematics & System Sciences was formed. In the Shanghai area, the eight former biological institutes was regrouped into four institutes and one center,which formed the newly established Shanghai Institutes for Biological Sciences.……
文摘What it means for China's economy... Last month, the Chinese Government made sweeping changes to the export tax breaks that domestic companies receive. Here's what happened: On September 14, the Ministry of Finance, the General Administration of Customs, the National Development and Reform Commission, the Ministry
基金supported by Shaanxi Normal University Academician Expert Workstation Foundation(1110010375)the National Key Laboratory of Protein and Plant Gene Research Open Project(ZD2021058)。
文摘Durian(Durio zibethinus)is a tropical fruit that has a unique flavor and aroma.It occupies a significant phylogenetic position within the Malvaceae family.Extant core-eudicot plants are reported to share seven ancestral karyotypes that have undergone reshuffling,resulting in an abundant genomic diversity.However,the ancestral karyotypes of the Malvaceae family,as well as the evolution trajectory leading to the28 chromosomes in durian,remain poorly understood.Here,we report the high-quality assembly of the durian genome with comprehensive comparative genomic analyses.By analyzing the collinear blocks between cacao and durian,we inferred 11 Malvaceae ancestral karyotypes.These blocks were present in a single-copy form in cacao and mainly in triplicates in durian,possibly resulting from a recent whole genome triplication(WGT)event that led to hexaploidization of the durian genome around 20(17–24)million years ago.A large proportion of the duplicated genes in durian,such as those involved in the lignin biosynthesis module for phenylpropane biosynthesis,are derived directly from whole genome duplication,which makes it an important force in reshaping its genomic architecture.Transcriptome studies have revealed that genes involved in feruloyl-Co A formations were highly preferentially expressed in fruit peels,indicating that the thorns produced on durian fruit may comprise guaiacyl and syringyl lignins.Among all the analyzed transcription factors(TFs),members of the heat shock factor family(HSF)were the most significantly upregulated under heat stress.All subfamilies of genes encoding heat shock proteins(HSPs)in the durian genome appear to have undergone expansion.The potential interactions between HSF Dzi05.397 and HSPs were examined and experimentally verified.Our study provides a high-quality durian genome and reveals the reshuffling mechanism of ancestral Malvaceae chromosomes to produce the durian genome.We also provide insights into the mechanism underlying lignin biosynthesis and heat stress tolerance.
文摘Boosted by a booming e-commerce industry, the courier sector has seen fast growth over the past few years, with the number of handled parcels increasing by 10 billion on average in each of the past three years, according to the State Post Bureau (SPB). Agures from the National Bureau of Statistics showed that the industry handled a total of 50.71 billion parcels in 2018, up 26.6 percent from the previous year, while total revenue grew 21.8 percent year on year to 603.84 billion yuan ($88.8 billion).
