As early as 1874, the French scientist P^re A. David introduced to science a new bird species, Trochalopteron milnei, described as： ＂Ressemblant au T.formosum du Setchouan, mais ayant le dessus de la tete couleur de...As early as 1874, the French scientist P^re A. David introduced to science a new bird species, Trochalopteron milnei, described as： ＂Ressemblant au T.formosum du Setchouan, mais ayant le dessus de la tete couleur de cannelle ou d＇amadou, et la r6gion parotique blanche＂ （David, 1874）. The bird skin that P^re David collected, and so far deposited in Museum National d＇Histoire Naturelle in Paris, was from ＂Koaten of W Fo-kien＂, in the current Chinese romanization system, Koaten is spelt as Guadun and Fo-kien spelt as Fujian.展开更多
Upland cotton （Gossypium hirsutum L.） is an allotetraploid species originated from interspecific hybridization between AA-genome diploid （G. arboretum） and DD-genome diploid （G. raimondii） （Wendel et al., 1992...Upland cotton （Gossypium hirsutum L.） is an allotetraploid species originated from interspecific hybridization between AA-genome diploid （G. arboretum） and DD-genome diploid （G. raimondii） （Wendel et al., 1992）. Cotton fibers are single-celled trichomes that emerge from the ovule epidermal cells. Indexed by the number of days post-anthesis （dpa）, fiber morphogenesis includes four distinct but overlapping steps： initiation （0-3 dpa）, elongation （3-20 dpa）, secondary cell wall thickening （15-45 dpa） and maturation （40-60 dpa） （Yang et al., 2008, Du et al., 2013）. The efficiency and duration of each morphogenesis stage is important to the quality attributes of the mature fiber. Cell elongation is critical for fiber length, whereas secondary cell wall thickening is important for fiber fineness and strength （Meinert and Delmer, 1977）.展开更多
The latest book of my poems has not been sellingvery well -- in fact 122 of my personal friends andrelations tell me they’ve bought it, but the publi-shers say only 84 copies have been sold. So thegeneral public seem...The latest book of my poems has not been sellingvery well -- in fact 122 of my personal friends andrelations tell me they’ve bought it, but the publi-shers say only 84 copies have been sold. So thegeneral public seem to have received it rather coldly. 'The trouble is,' said Edith, 'that nobody hasever heard of you; and those who have heard of展开更多
Abstract This is the first part of a series of articles dealing with corrections and additionsto The Gomphid Dragonflies of China published by the author in 1990.Comprised in thisarticle are the following items.(I)GOM...Abstract This is the first part of a series of articles dealing with corrections and additionsto The Gomphid Dragonflies of China published by the author in 1990.Comprised in thisarticle are the following items.(I)GOMPHINAE.(1)Revisionary study of the genusDavidius Selys with 7—marks on the frontal surface of synthorax.l.D.truncus Chao,sp.nov.=D.fruhstorferi junior Chao 1954(in part),=D.fuhstorferu serenns Asahina 1956(in part);2.D.fruhstorferi Martin=Gomphus junior Navas 1936,syn,nov.,=D.serenusNeedham 1941,syn.nov.,=D.f,junior Chao 1954(in part),=D.f.serenus Asahina1956(in part),=D.f.guizhouensis Chao et Liu 1990,syn.nov.,3.D.trox Needham,redescription,(?),neallotype,(?);4.D.squarrosus Zhu;5.D.zhoui Chao,sp.nov.,=D.trox zhou 1986,not Needham 1931,misidentification,=D.Trox Yang et Davies1993, not Needham 193l, misidcntification. (2) Trigomghus lautus Needham,redescription, (?), neallotypc,(?). (3) Anisogomphus anderi Licftinck,description ofnymph. (Ⅱ) ONYCHOGOMPHINAE: (4) Nihonogomphus is divided展开更多
I’d always welcomed the friendly sound of my brother’svoice calling from Maryland,but this time his words jolted meas I stood with the kitchen phone to my ear.“Bar,”said Dicksomberly,“we have to make a decision t...I’d always welcomed the friendly sound of my brother’svoice calling from Maryland,but this time his words jolted meas I stood with the kitchen phone to my ear.“Bar,”said Dicksomberly,“we have to make a decision tonight.The展开更多
The advances and retreats of glaciations through the Pleistocene,especially most recent the Last Glacial Maximum(19-26 thousand years ago),have significantly affected the demographic history,abundance and distribution...The advances and retreats of glaciations through the Pleistocene,especially most recent the Last Glacial Maximum(19-26 thousand years ago),have significantly affected the demographic history,abundance and distribution pattern of modern species.During these glaciations,many species were excluded from large parts of their ranges and forced into refugia by the expanding ice sheets,followed by展开更多
Neurodevelopmental processes represent a finely tuned interplay between genetic and environmental factors,shaping the dynamic landscape of the developing brain.A major component of the developing brain that enables th...Neurodevelopmental processes represent a finely tuned interplay between genetic and environmental factors,shaping the dynamic landscape of the developing brain.A major component of the developing brain that enables this dynamic is the white matter(WM),known to be affected in neurodevelopmental disorders(NDDs)(Rokach et al.,2024).WM formation is mediated by myelination,a multifactorial process driven by neuro-glia interactions dependent on proper neuronal functionality(Simons and Trajkovic,2006).Another key aspect of neurodevelopmental abnormalities involves neuronal dynamics and function,with recent advances significantly enhancing our understanding of both neuronal and glial mitochondrial function(Devine and Kittler,2018;Rojas-Charry et al.,2021).Energy homeostasis in neurons,attributed largely to mitochondrial function,is critical for proper functionality and interactions with oligodendrocytes(OLs),the cells forming myelin in the brain’s WM.We herein discuss the interplay between these processes and speculate on potential dysfunction in NDDs.展开更多
There has been a century-long debate in evolutionary developmental biology about whether the ancestral metazoan was a larva or an adult. Two competing hypotheses have been proposed: the ‘‘terminal addition''...There has been a century-long debate in evolutionary developmental biology about whether the ancestral metazoan was a larva or an adult. Two competing hypotheses have been proposed: the ‘‘terminal addition''theory, which assumes the primitiveness of larvae, and the‘‘intercalation'' theory, which assumes the primitiveness of adults. A consensus has not yet been reached, but the‘‘terminal addition'' theory appears to be more widely accepted. However, in contrast to the majority of larvae among living metazoans, all currently known fossil invertebrate embryos such as Markuelia and Olivooides are direct developers. Here, we describe Eolarva kuanchuanpuensis gen. et sp. nov., the oldest known larva, from the early Cambrian(*535 Ma) of South China. Eolarva kuanchuanpuensis lacks a mouth or any other type of feeding apparatus, which is non-feeding or lecithotrophic.It possesses a distinct body plan and might represent a cnidarian-grade animal. This is the first fossil evidence indicating that indirect development is the plesiomorphy of metazoan development.展开更多
We present some known-key distinguishers for a type-1 Feistel scheme with a permutation as the round function. To be more specific, the 29-round known-key truncated differential distinguishers are given for the 256-bi...We present some known-key distinguishers for a type-1 Feistel scheme with a permutation as the round function. To be more specific, the 29-round known-key truncated differential distinguishers are given for the 256-bit type-1 Feistel scheme with an SP （substitution-permutation） round function by using the rebound attack, where the S-boxes have perfect differential and linear properties and the linear diffusion layer has a maximum branch number. For two 128-bit versions, the distinguishers can be applied on 25- round structures. Based on these distinguishers, we construct near-collision attacks on these schemes with MMO （Matyas- Meyer-Oseas） and MP （Miyaguchi-Preneel） hashing modes, and propose the 26-round and 22-round near-collision attacks for two 256-bit schemes and two 128-bit schemes, respectively. We apply the near-collision attack on MAME and obtain a 26-round near-collision attack. Using the algebraic degree and some integral properties, we prove the correctness of the 31-round known-key integral distinguisher proposed by Sasaki et al. We show that if the round function is a permutation, the integral distinguisher is suitable for a type-1 Feistel scheme of any size.展开更多
Sufficient conditions are given for the existence of unknown and partially known input normal and descriptor observers for a class of descriptor discrete time networked control systems.It is shown that a causal and re...Sufficient conditions are given for the existence of unknown and partially known input normal and descriptor observers for a class of descriptor discrete time networked control systems.It is shown that a causal and regular descriptor system subjected to input and output periodic communication constraints,can be down sampled into a causal and regular p-lifted time invariant system.According to the lifted formulation,interesting results on minimum and maximum feasible values for communication sequence periods are drawn for the existence of an unknown or partially known input observer.The case of partially known input observer,cover unknown input case as an extreme case.An example is given for clarification.展开更多
Just by chance,Yang Zhaohua,vice president of the Sub-Council of Textile Industry,CCPIT,saw hand embroidery and paper-cut attracting a lot of rabid fans on the Shenzhen International Culture Fair.
The paper is concerned with positive observer design for positive Markovian jump systems with partly known transition rates. By applying a linear co-positive type Lyapunov-Krasovskii function,a sufficient condition is...The paper is concerned with positive observer design for positive Markovian jump systems with partly known transition rates. By applying a linear co-positive type Lyapunov-Krasovskii function,a sufficient condition is proposed to ensure the stochastic stability of the error positive system and the existence of the positive observer, which is computed in linear programming. Finally, an example is given to demonstrate the validity of the main results.展开更多
With fierce competition in the global high-speed railway(HSR)market,international reputation has become essential for enterprises to venture into overseas markets.However,few studies have been performed on the interna...With fierce competition in the global high-speed railway(HSR)market,international reputation has become essential for enterprises to venture into overseas markets.However,few studies have been performed on the international reputation of HSR enterprises.This study aims to reveal the formation mechanism of HSR enterprises’international reputation by developing a theoretical framework.The researchers identified five factors and proposed a hypothetical path model based on a comprehensive literature review.After the pilot study,questionnaires were distributed to practitioners in the international HSR industry for data collection.The path model was validated based on partial least-squares structural equation modeling.Eight of the nine paths are statistically supported.Researchers have structured a theoretical framework for the international reputation of HSR enterprises from two perspectives:Being good and being known.Subsequently,a strategic framework was developed to provide targeted promotion strategies for HSR enterprises.The findings of this study contribute to existing international reputation theories using the theoretical model and provide beneficial guidance for HSR enterprises to improve their international reputation through a strategic framework.展开更多
文摘As early as 1874, the French scientist P^re A. David introduced to science a new bird species, Trochalopteron milnei, described as： ＂Ressemblant au T.formosum du Setchouan, mais ayant le dessus de la tete couleur de cannelle ou d＇amadou, et la r6gion parotique blanche＂ （David, 1874）. The bird skin that P^re David collected, and so far deposited in Museum National d＇Histoire Naturelle in Paris, was from ＂Koaten of W Fo-kien＂, in the current Chinese romanization system, Koaten is spelt as Guadun and Fo-kien spelt as Fujian.
基金supported by the grants from the State Key Basic Research and Development Plan (No. 2010CB126003)the National Transgenic Animals and Plants Research Project (Nos. 2011ZX08005-003 and 2011ZX08009-003)
文摘Upland cotton （Gossypium hirsutum L.） is an allotetraploid species originated from interspecific hybridization between AA-genome diploid （G. arboretum） and DD-genome diploid （G. raimondii） （Wendel et al., 1992）. Cotton fibers are single-celled trichomes that emerge from the ovule epidermal cells. Indexed by the number of days post-anthesis （dpa）, fiber morphogenesis includes four distinct but overlapping steps： initiation （0-3 dpa）, elongation （3-20 dpa）, secondary cell wall thickening （15-45 dpa） and maturation （40-60 dpa） （Yang et al., 2008, Du et al., 2013）. The efficiency and duration of each morphogenesis stage is important to the quality attributes of the mature fiber. Cell elongation is critical for fiber length, whereas secondary cell wall thickening is important for fiber fineness and strength （Meinert and Delmer, 1977）.
文摘The latest book of my poems has not been sellingvery well -- in fact 122 of my personal friends andrelations tell me they’ve bought it, but the publi-shers say only 84 copies have been sold. So thegeneral public seem to have received it rather coldly. 'The trouble is,' said Edith, 'that nobody hasever heard of you; and those who have heard of
文摘Abstract This is the first part of a series of articles dealing with corrections and additionsto The Gomphid Dragonflies of China published by the author in 1990.Comprised in thisarticle are the following items.(I)GOMPHINAE.(1)Revisionary study of the genusDavidius Selys with 7—marks on the frontal surface of synthorax.l.D.truncus Chao,sp.nov.=D.fruhstorferi junior Chao 1954(in part),=D.fuhstorferu serenns Asahina 1956(in part);2.D.fruhstorferi Martin=Gomphus junior Navas 1936,syn,nov.,=D.serenusNeedham 1941,syn.nov.,=D.f,junior Chao 1954(in part),=D.f.serenus Asahina1956(in part),=D.f.guizhouensis Chao et Liu 1990,syn.nov.,3.D.trox Needham,redescription,(?),neallotype,(?);4.D.squarrosus Zhu;5.D.zhoui Chao,sp.nov.,=D.trox zhou 1986,not Needham 1931,misidentification,=D.Trox Yang et Davies1993, not Needham 193l, misidcntification. (2) Trigomghus lautus Needham,redescription, (?), neallotypc,(?). (3) Anisogomphus anderi Licftinck,description ofnymph. (Ⅱ) ONYCHOGOMPHINAE: (4) Nihonogomphus is divided
文摘I’d always welcomed the friendly sound of my brother’svoice calling from Maryland,but this time his words jolted meas I stood with the kitchen phone to my ear.“Bar,”said Dicksomberly,“we have to make a decision tonight.The
文摘The advances and retreats of glaciations through the Pleistocene,especially most recent the Last Glacial Maximum(19-26 thousand years ago),have significantly affected the demographic history,abundance and distribution pattern of modern species.During these glaciations,many species were excluded from large parts of their ranges and forced into refugia by the expanding ice sheets,followed by
文摘Neurodevelopmental processes represent a finely tuned interplay between genetic and environmental factors,shaping the dynamic landscape of the developing brain.A major component of the developing brain that enables this dynamic is the white matter(WM),known to be affected in neurodevelopmental disorders(NDDs)(Rokach et al.,2024).WM formation is mediated by myelination,a multifactorial process driven by neuro-glia interactions dependent on proper neuronal functionality(Simons and Trajkovic,2006).Another key aspect of neurodevelopmental abnormalities involves neuronal dynamics and function,with recent advances significantly enhancing our understanding of both neuronal and glial mitochondrial function(Devine and Kittler,2018;Rojas-Charry et al.,2021).Energy homeostasis in neurons,attributed largely to mitochondrial function,is critical for proper functionality and interactions with oligodendrocytes(OLs),the cells forming myelin in the brain’s WM.We herein discuss the interplay between these processes and speculate on potential dysfunction in NDDs.
基金supported by the National Natural Science Foundation of China(4137201541102003+4 种基金J1210006)the State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and PalaeontologyChinese Academy of Sciences(10310220132107)the Research Fund for the Doctoral Program of High Education(20060001059)
文摘There has been a century-long debate in evolutionary developmental biology about whether the ancestral metazoan was a larva or an adult. Two competing hypotheses have been proposed: the ‘‘terminal addition''theory, which assumes the primitiveness of larvae, and the‘‘intercalation'' theory, which assumes the primitiveness of adults. A consensus has not yet been reached, but the‘‘terminal addition'' theory appears to be more widely accepted. However, in contrast to the majority of larvae among living metazoans, all currently known fossil invertebrate embryos such as Markuelia and Olivooides are direct developers. Here, we describe Eolarva kuanchuanpuensis gen. et sp. nov., the oldest known larva, from the early Cambrian(*535 Ma) of South China. Eolarva kuanchuanpuensis lacks a mouth or any other type of feeding apparatus, which is non-feeding or lecithotrophic.It possesses a distinct body plan and might represent a cnidarian-grade animal. This is the first fossil evidence indicating that indirect development is the plesiomorphy of metazoan development.
基金Acknowledgements This research project was promoted by the Scientific Research Foundation for High Level Talents of Henan Normal University （01016500148） and the National Natural Science Foundation of China （Grant Nos. 61272476, 61232009）.
文摘We present some known-key distinguishers for a type-1 Feistel scheme with a permutation as the round function. To be more specific, the 29-round known-key truncated differential distinguishers are given for the 256-bit type-1 Feistel scheme with an SP （substitution-permutation） round function by using the rebound attack, where the S-boxes have perfect differential and linear properties and the linear diffusion layer has a maximum branch number. For two 128-bit versions, the distinguishers can be applied on 25- round structures. Based on these distinguishers, we construct near-collision attacks on these schemes with MMO （Matyas- Meyer-Oseas） and MP （Miyaguchi-Preneel） hashing modes, and propose the 26-round and 22-round near-collision attacks for two 256-bit schemes and two 128-bit schemes, respectively. We apply the near-collision attack on MAME and obtain a 26-round near-collision attack. Using the algebraic degree and some integral properties, we prove the correctness of the 31-round known-key integral distinguisher proposed by Sasaki et al. We show that if the round function is a permutation, the integral distinguisher is suitable for a type-1 Feistel scheme of any size.
文摘Sufficient conditions are given for the existence of unknown and partially known input normal and descriptor observers for a class of descriptor discrete time networked control systems.It is shown that a causal and regular descriptor system subjected to input and output periodic communication constraints,can be down sampled into a causal and regular p-lifted time invariant system.According to the lifted formulation,interesting results on minimum and maximum feasible values for communication sequence periods are drawn for the existence of an unknown or partially known input observer.The case of partially known input observer,cover unknown input case as an extreme case.An example is given for clarification.
文摘Just by chance,Yang Zhaohua,vice president of the Sub-Council of Textile Industry,CCPIT,saw hand embroidery and paper-cut attracting a lot of rabid fans on the Shenzhen International Culture Fair.
基金supported by the Key Program of National Natural Science Foundation of China under Grant Nos.61573088 and 61433004
文摘The paper is concerned with positive observer design for positive Markovian jump systems with partly known transition rates. By applying a linear co-positive type Lyapunov-Krasovskii function,a sufficient condition is proposed to ensure the stochastic stability of the error positive system and the existence of the positive observer, which is computed in linear programming. Finally, an example is given to demonstrate the validity of the main results.
基金This study was supported by the National Natural Science Foundation of China(Grant Nos.72071133,71771052,and 72171048)the Research Project on Humanities and Social Sciences of Hebei Higher Education Institutions(Top Young Scholar Project)(Grant No.BJ2019079)+2 种基金the Fundamental Research Funds for the Hebei Universities(Grant No.SQK202002)the Natural Science Foundation of Hebei(Grant No.G2019210226)the Scientific Research Planning Project of China State Railway Group(Grant No.2020F026).
文摘With fierce competition in the global high-speed railway(HSR)market,international reputation has become essential for enterprises to venture into overseas markets.However,few studies have been performed on the international reputation of HSR enterprises.This study aims to reveal the formation mechanism of HSR enterprises’international reputation by developing a theoretical framework.The researchers identified five factors and proposed a hypothetical path model based on a comprehensive literature review.After the pilot study,questionnaires were distributed to practitioners in the international HSR industry for data collection.The path model was validated based on partial least-squares structural equation modeling.Eight of the nine paths are statistically supported.Researchers have structured a theoretical framework for the international reputation of HSR enterprises from two perspectives:Being good and being known.Subsequently,a strategic framework was developed to provide targeted promotion strategies for HSR enterprises.The findings of this study contribute to existing international reputation theories using the theoretical model and provide beneficial guidance for HSR enterprises to improve their international reputation through a strategic framework.
