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On the transience and recurrence of Lamperti’s random walk on Galton-Watson trees
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作者 Wenming Hong Minzhi Liu 《中国科学:数学英文版》 SCIE CSCD 2019年第9期1813-1822,共10页
In a Galton-Watson tree generated by a supercritical branching process with offspring N and EN =:m > 1, the conductance assigned to the edge between the vertex x and its parent x* is denoted by C(x) and given by C(... In a Galton-Watson tree generated by a supercritical branching process with offspring N and EN =:m > 1, the conductance assigned to the edge between the vertex x and its parent x* is denoted by C(x) and given by C(x) =(λ +A/|x|α)-|x|, where |x| is the generation of the vertex x. For(Xn)n≥0, a C(x)-biased random walk on the tree, we show that (1) when λ≠ m, α > 0,(Xn)n≥0 is transient/recurrent according to whether λ < m or λ > m, respectively;(2) when λ = m, 0 < α < 1,(Xn)n≥ 0 is transient/recurrent according to whether A < 0 or A > 0, respectively.In particular, if P(N = 1) = 1, the C(x)-biased random walk is Lamperti’s random walk on the nonnegative integers(see Lamperti(1960)). 展开更多
关键词 INHOMOGENEOUS biased random WALK on the branching tree TRANSIENCE RECURRENCE time-inhomogeneous branching process
A branching heuristic for SAT solvers based on complete implication graphs
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作者 Fan XIAO Chu-Min LI +3 位作者 Mao LUO Felip MANYA Zhipeng Lü Yu LI 《中国科学:信息科学(英文版)》 SCIE EI CSCD 2019年第7期170-182,共13页
The performance of modern conflict-driven clause learning(CDCL) SAT solvers strongly depends on branching heuristics. State-of-the-art branching heuristics, such as variable state independent decaying sum(VSIDS) and l... The performance of modern conflict-driven clause learning(CDCL) SAT solvers strongly depends on branching heuristics. State-of-the-art branching heuristics, such as variable state independent decaying sum(VSIDS) and learning rate branching(LRB), are computed and maintained by aggregating the occurrences of the variables in conflicts. However, these heuristics are not sufficiently accurate at the beginning of the search because they are based on very few conflicts. We propose the distance branching heuristic, which,given a conflict, constructs a complete implication graph and increments the score of a variable considering the longest distance between the variable and the conflict rather than the simple presence of the variable in the graph. We implemented the proposed distance branching heuristic in Maple LCM and Glucose-3.0, two of the best CDCL SAT solvers, and used the resulting solvers to solve instances from the application and crafted tracks of the 2014 and 2016 SAT competitions and the main track of the 2017 SAT competition. The empirical results demonstrate that using the proposed distance branching heuristic in the initialization phase of Maple LCM and Glucose-3.0 solvers improves performance. The Maple LCM solver with the proposed distance branching heuristic in the initialization phase won the main track of the 2017 SAT competition. 展开更多
关键词 SAT branching HEURISTIC conflict-driven CLAUSE learning IMPLICATION GRAPH
Asymptotic Behaviors for Critical Branching Processes with Immigration
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作者 Dou Dou LI Mei ZHANG 《数学学报:英文版》 SCIE CSCD 2019年第4期537-549,共13页
In this paper, we investigate the asymptotic behaviors of the critical branching process with immigration {Zn, n ≥ 0}. First we get some estimation for the probability generating function of Zn. Based on it, we get a... In this paper, we investigate the asymptotic behaviors of the critical branching process with immigration {Zn, n ≥ 0}. First we get some estimation for the probability generating function of Zn. Based on it, we get a large deviation for Zn+1/Zn. Lower and upper deviations for Zn are also studied. As a by-product, an upper deviation for max1≤i≤n Zi is obtained. 展开更多
关键词 CRITICAL branching PROCESS IMMIGRATION LARGE DEVIATIONS
A new sampling method in the Zagros forests using GIS(case study:Ilam forests of Iran) 预览
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作者 A.Karamshahi 《林业研究:英文版》 CAS CSCD 2019年第6期2079-2085,共7页
One of the basic parameters in forest management planning is detailed knowledge of growing stock,information collected by forest inventory.Sampling methods must be accurate,inexpensive,and be easy to implement in the ... One of the basic parameters in forest management planning is detailed knowledge of growing stock,information collected by forest inventory.Sampling methods must be accurate,inexpensive,and be easy to implement in the field.This study presents a new sampling method called branching transect for use in the Iranian Zagros forests and similar forests.Features of the new method include greater accuracy,easy implementation in nature,simplicity of statistical calculations,and low cost.In this method,transect is used,which includes some subtransects(side branches).The length of the main transect,side branches,number of trees measured in each side branch,and the number of sub-branches in this method are changeable based on homogeneity,heterogeneity,and density of a forest.In this study,based on the density and heterogeneity of the forest area studied,20-m transects with four and eight side branches were used.Sampling plots(Transects)in four inventory networks(100 m×100 m,100 m×150 m,150 m×150 m and 100 m×200 m)were implemented in the GIS environment.The results of this sampling method were compared to the results of total inventory(100%count)in terms of accuracy,precision(t-test),and inventory error percentage.Branching transect results were statistially similar to total inventory counts in all cases.The results show that this method of estimating density and canopy per hectare can be used in Zagros forests and similar forests. 展开更多
关键词 Branching TRANSECT CANOPY DENSITY NETWORK Sampling methods ZAGROS FORESTS
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L log L criterion for a class of multitype superdiffusions with non-local branching mechanisms
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作者 Zhen-Qing Chen Yan-Xia Ren Renming Song 《中国科学:数学》 CSCD 北大核心 2019年第8期I0001-I0004,共4页
In this paper, we provide a pathwise spine decomposition for multitype superdiffusions with non-local branching mechanisms under a martingale change of measure. As an application of this decomposition, we obtain a nec... In this paper, we provide a pathwise spine decomposition for multitype superdiffusions with non-local branching mechanisms under a martingale change of measure. As an application of this decomposition, we obtain a necessary and sufficient condition (called the L log L criterion) for the limit of the fundamental martingale to be non-degenerate. This result complements the related results obtained in Kyprianou et al.(2012), Kyprianou and Murillo-Salas (2013) and Liu et al.(2009) for superprocesses with purely local branching mechanisms and in Kyprianou and Palau (2018) for super Markov chains. 展开更多
关键词 multitype SUPERDIFFUSION NON-LOCAL branching mechanism SWITCHED diflFusion SPINE decomposition MARTIN GALE
Impact of alkyl chain branching positions on molecular packing and electron transport of dimeric perylenediimide derivatives 预览
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作者 Yuan Guo Guangchao Han Yuanping Yi 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第8期138-143,I0006共7页
Side chains play a critical role in tuning intermolecular interaction and charge transport in organic semiconductors. Here, we have systematically investigated the impact of branching positions of the alkyl side chain... Side chains play a critical role in tuning intermolecular interaction and charge transport in organic semiconductors. Here, we have systematically investigated the impact of branching positions of the alkyl side chains on the molecular packing and electron transport properties of a series of bay-linked dimeric perylenediimide(PDI) derivatives by atomistic molecular dynamics simulations in combination with charge transfer rate theory and kinetic Monte Carlo simulations. The results show that despite of different branching positions of the alkyl chains,π–π stacking is effectively inhibited for all the dimeric PDI derivatives. As the branching position moves away from the PDI backbone, the appearance of the alkyl atoms around the PDI backbone will first decrease and then increase. Correspondingly, the short contacts between the PDI moieties are first enhanced and then reduced. In particular, when the branching position is at the third carbon atom, the intermolecular connectivity becomes the most effective and the electron mobility is significantly increased by 2 times. 展开更多
关键词 Molecular packing Electron MOBILITY Branching POSITION PERYLENEDIIMIDE
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Fragmentation for selection: how the deleterious mt DNA is removed in the female germline
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作者 Chao Tong 《科学通报:英文版》 SCIE EI CSCD 2019年第22期1646-1648,共3页
Mitochondria are the energy factories and metabolic centers of cells,and their malfunction can lead to multiple human diseases.As highly dynamic organelles,mitochondria undergo frequent fission and fusion processes[1]... Mitochondria are the energy factories and metabolic centers of cells,and their malfunction can lead to multiple human diseases.As highly dynamic organelles,mitochondria undergo frequent fission and fusion processes[1].The fusion process enables the exchange of inner materials between individual mitochondrion.The materials from healthy mitochondria could potentially compensate for the defects found in the defective mitochondria.Fission processes not only increase the mitochondrial number but also separate the damaged parts of mitochondria from the healthy ones,thus,facilitating the elimination of the defective mitochondria through a process known as mitophagy.Excessive fusion leads to extra connections and branching of the mitochondria,whereas extra fission results in fragmentation of mitochondria.The fusion and fission processes are differently tuned in various tissues to adapt to different physiological requirements[2]. 展开更多
关键词 removed branching ELIMINATION
L log L criterion for a class of multitype superdiffusions with non-local branching mechanisms
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作者 Zhen-Qing Chen Yan-Xia Ren Renming Song 《中国科学:数学英文版》 SCIE CSCD 2019年第8期1439-1462,共24页
In this paper, we provide a pathwise spine decomposition for multitype superdiffusions with nonlocal branching mechanisms under a martingale change of measure. As an application of this decomposition,we obtain a neces... In this paper, we provide a pathwise spine decomposition for multitype superdiffusions with nonlocal branching mechanisms under a martingale change of measure. As an application of this decomposition,we obtain a necessary and sufficient condition(called the L log L criterion) for the limit of the fundamental martingale to be non-degenerate. This result complements the related results obtained in Kyprianou et al.(2012),Kyprianou and Murillo-Salas(2013) and Liu et al.(2009) for superprocesses with purely local branching mechanisms and in Kyprianou and Palau(2018) for super Markov chains. 展开更多
关键词 multitype SUPERDIFFUSION NON-LOCAL branching mechanism SWITCHED diffusion SPINE decomposition MARTINGALE
Optimal communication frequency for switching cabled ocean networks with commands carried over the power line
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作者 Yan-hu CHEN Yu-jia ZANG +1 位作者 Jia-jie YAO Gul MUHAMMAD 《信息与电子工程前沿:英文版》 SCIE EI CSCD 2019年第10期1331-1343,共13页
Cabled ocean networks with tree or ring topologies play an important role in real-time ocean exploration. Due to the time-consuming need for field maintenance, cable switching technology that can actively switch the p... Cabled ocean networks with tree or ring topologies play an important role in real-time ocean exploration. Due to the time-consuming need for field maintenance, cable switching technology that can actively switch the power on/off on certain branches of the network becomes essential for enhancing the reliability and availability of the network. In this paper, a novel switching-control method is proposed, in which we invert the power transmission polarity and use the current on the power line as the digital signal at low frequency to broadcast information with the address and commands to the network, and the corresponding branching unit (BU) can decode and execute the switching commands. The cable's parasitic parameters, the network scale, and the number of BUs, as the influencing factors of the communication frequency on the power line, are theoretically studied and sim-ulated. An optimized frequency that balances the executing accuracy and rate is calculated and proved on a simulated prototype. The results showed that the cable switching technology with optimized frequency can enhance the switching accuracy and con-figuring rate. 展开更多
关键词 Cable switching Cabled ocean network Branching unit Transmission line theory Communication frequency
基于自动提取句法模板的情感分析 预览
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作者 潘浩 卫宇杰 潘尔顺 《中文信息学报》 CSCD 北大核心 2019年第9期129-140,共12页
提出了一种自动化提取情感依存句法关系的分析方法。在待分析语句依存句法树的基础上,结合中文语法特点,定义了分枝、嫁接、剪枝和枝解四种基本操作,压缩依存树的特征空间的同时将语句转换成表征句法关系的子树集合,最后利用遗传算法求... 提出了一种自动化提取情感依存句法关系的分析方法。在待分析语句依存句法树的基础上,结合中文语法特点,定义了分枝、嫁接、剪枝和枝解四种基本操作,压缩依存树的特征空间的同时将语句转换成表征句法关系的子树集合,最后利用遗传算法求解最优情感子树集。针对第三届自然语言处理及中文计算会议(NLPCC 2014)评测数据的实验结果表明,该方法在语句是否表达情感的判别上具有优异效果。与基于词典的情感分析结合,可降低词典对客观句的高误判缺陷,进而明显改进基于词典的情感分析方法。 展开更多
关键词 情感分析 依存关系 分枝 剪枝 遗传算法
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Study of the s→dννrare hyperon decays in the Standard Model and new physics
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作者 胡晓会 赵振兴 《中国物理C:英文版》 SCIE CAS CSCD 2019年第9期26-32,共7页
FCNC processes offer important tools to test the Standard Model(SM)and to search for possible new physics.In this work,we investigate the s→dννrare hyperon decays in SM and beyond.We find that in SM the branching r... FCNC processes offer important tools to test the Standard Model(SM)and to search for possible new physics.In this work,we investigate the s→dννrare hyperon decays in SM and beyond.We find that in SM the branching ratios for these rare hyperon decays range from 10^-14 to 10^-11.When all the errors in the form factors are included,we find that the final branching ratios for most decay modes have an uncertainty of about 5%to 10%.After taking into account the contribution from new physics,the generalized SUSY extension of SM and the minimal 331 model,the decay widths for these channels can be enhanced by a factor of 2~7. 展开更多
关键词 branching ratios RARE HYPERON DECAYS FORM factors LIGHT-FRONT approach new PHYSICS
The contribution of the first forbidden transitions to the nuclear β−-decay half-life
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作者 游击林 张小平 +2 位作者 支启军 任中州 吴庆东 《中国物理C:英文版》 SCIE CAS CSCD 2019年第11期91-99,共9页
β-decay half-life is a key quantity for nuclear structure and nucleosynthesis studies.There exist large uncertainties in the contributions of allowed and forbidden transitions to the totalβ-decay life,which limits t... β-decay half-life is a key quantity for nuclear structure and nucleosynthesis studies.There exist large uncertainties in the contributions of allowed and forbidden transitions to the totalβ-decay life,which limits the resolution of the predictedβ-decay half-life.We systematically study the contribution of the first forbidden(FF)transitions to theβ−-decay half-life,and quantify it with a formula based on simple physics considerations.We also propose a new formula for calculation of theβ−-decay half-life that includes the FF contribution.It is shown that the inclusion of the contribution of FF transitions significantly improves the precision of calculations of theβ−-decay half-life.By fitting of the RQRPA results for neutron-rich Z=47,57 isotopes and N=80,94 isotones,the formula for the contribution of the FF transitions gives similar results as the RQRPA calculations.However,because of limited experimental data for the branching ratios of unstable nuclei,the fit parameters are not fully constrained.Therefore,the proposed formula for theβ−-decay half-life is more suitable for calculations of half-lives than of the FF contributions.The formula could be used to predict theβ−-decay half-life in nuclear structure studies as well as nucleosynthesis calculations in stars. 展开更多
关键词 β^−decay half-life NUCLEOSYNTHESIS first forbidden transitions branching ratios
Dendritic branching patterns in platforms of complex Ni-based single crystal castings
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作者 Min Huang Gong Zhang +4 位作者 Dong Wang Zhi-cheng Ge Yu-zhang Lu Xiang-wei Jiang Lang-hong Lou 《中国铸造:英文版》 SCIE 2019年第2期110-117,共8页
Dendritic branching patterns at variable cross-sections in Ni-based single crystal(SX) castings of different generations were investigated using optical microscope(OM), electro probe microanalyzer(EPMA),differential s... Dendritic branching patterns at variable cross-sections in Ni-based single crystal(SX) castings of different generations were investigated using optical microscope(OM), electro probe microanalyzer(EPMA),differential scanning calorimeter(DSC), Thermo-Cal software and Pro-CAST software. Results show that the dendritic branching patterns are similar in outward platform in SXs of different generations. That is, the primary dendrites(PDs) are introduced into the platform by developing a series of secondary dendrites(SDs) to occupy the bottom of the platform, and the ternary dendrites(TDs) originating from these SDs grow upward to fill up the platform. With the SX generation increasing, the undercooling of melts in the inward platform increases significantly due to the increasing alloying elements and the segregation in the directional solidification(DS)process, and the growth velocity of the dendrite tip increases according to the dynamic model of dendrite growth,which is beneficial for the high-order dendrite development. The stronger dendritic branching ability is shown in the inward platform of the higher generation Ni-based SX. 展开更多
关键词 DENDRITIC branching patterns platform UNDERCOOLING
奶牛乳腺分支模型的建立 预览
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作者 崔英俊 于广璞 +5 位作者 汤云飞 李慧铭 边艳杰 孙喆 刘智宇 孙霞 《中国乳品工业》 CAS 北大核心 2019年第1期16-18,共3页
利用从青春期奶牛乳腺中提取的类器官,在Ⅰ型胶原中以镶嵌式进行三维培养,用碱性成纤维细胞生长因子(basic fibroblastgrowth factor,FGF2)处理来建立奶牛乳腺分支模型。结果表明,在Ⅰ型胶原中以镶嵌式培养的青春期奶牛乳腺类器官,在FGF... 利用从青春期奶牛乳腺中提取的类器官,在Ⅰ型胶原中以镶嵌式进行三维培养,用碱性成纤维细胞生长因子(basic fibroblastgrowth factor,FGF2)处理来建立奶牛乳腺分支模型。结果表明,在Ⅰ型胶原中以镶嵌式培养的青春期奶牛乳腺类器官,在FGF2处理下36 h时镜下即可见分支形态出现;且从36 h开始,FGF2组分支率显著高于对照组,表明奶牛乳腺分支化培养模型成功建立。结论:FGF2能使镶嵌在Ⅰ型胶原中的青春期奶牛乳腺类器官产生分支形态。 展开更多
关键词 奶牛 乳腺 分支 Ⅰ型胶原
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光电离速率影响大气压空气正流注分支的机理研究 预览
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作者 涂婧怡 陈赦 汪沨 《物理学报》 SCIE EI CAS CSCD 北大核心 2019年第9期203-211,共9页
大气压空气中的流注放电有广泛的理论和应用研究价值,包括雷电机理、输变电系统空气绝缘理论以及材料表面改性等.流注是一个快速发展的强电离区域,在传播过程中存在着一种重要的特点—分支现象.光电离为正流注发展提供必要的自由电子,... 大气压空气中的流注放电有广泛的理论和应用研究价值,包括雷电机理、输变电系统空气绝缘理论以及材料表面改性等.流注是一个快速发展的强电离区域,在传播过程中存在着一种重要的特点—分支现象.光电离为正流注发展提供必要的自由电子,且实验结果表明分支特征与流注头部的光电离速率密切相关.本文基于新的流注分支判据,采用了粒子网格单元与蒙特卡罗碰撞相结合(PIC-MCC)的三维放电模型(Pamdi3D)进行数值仿真验证.为了研究光电离速率对正流注分支的影响,仿真了毫米尺度间隙针-板电极正流注发展,系统研究了不同光电离参数的影响.当减小氮气-氧气比例、光子吸收截面或光电离效率系数后,流注均更早地出现分支现象.这些计算结果表明大气压空气中流注头部光电离速率的降低将导致其发生分支的概率更高. 展开更多
关键词 流注放电 分支 光电离 PIC-MCC 大气压等离子体
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底板梳状定向钻孔技术理论与实践
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作者 管强盛 《煤矿安全》 CAS 北大核心 2019年第2期72-75,共4页
针对突出薄煤层采用底板穿层钻孔进行瓦斯抽采存在钻孔穿煤长度短、钻孔轨迹无法控制、钻孔有效利用率低等问题,利用底板梳状定向钻孔技术在煤层底板岩层施工长距离钻孔,同时开分支进入煤层,实现对突出薄煤层的瓦斯治理。根据底板梳状... 针对突出薄煤层采用底板穿层钻孔进行瓦斯抽采存在钻孔穿煤长度短、钻孔轨迹无法控制、钻孔有效利用率低等问题,利用底板梳状定向钻孔技术在煤层底板岩层施工长距离钻孔,同时开分支进入煤层,实现对突出薄煤层的瓦斯治理。根据底板梳状定向钻孔施工特点,分析了底板梳状定向钻孔分支孔分支点位置的选择、分支孔间距确定、分支孔开孔施工工艺、钻孔轨迹控制等关键技术并给出了建议。实践证明,通过该套底板梳状定向钻孔技术的应用,能使底板梳状定向钻孔实现对大于500 m范围突出薄煤层的有效覆盖,大大提高钻孔利用率。 展开更多
关键词 突出薄煤层 瓦斯抽采 底板梳状定向钻孔 开分支 钻孔轨迹控制
ASYMPTOTIC PROPERTIES OF A BRANCHING RANDOM WALK WITH A RANDOM ENVIRONMENT IN TIME 预览
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作者 王月娇 刘再明 +1 位作者 刘全升 李应求 《数学物理学报:B辑英文版》 SCIE CSCD 2019年第5期1345-1362,共18页
We consider a branching random walk in an independent and identically distributed random environment ξ=(ξn) indexed by the time. Let W be the limit of the martingale Wn=∫e^-txZn(dx)/Eξ∫e^-txZn(dx), with Zn denoti... We consider a branching random walk in an independent and identically distributed random environment ξ=(ξn) indexed by the time. Let W be the limit of the martingale Wn=∫e^-txZn(dx)/Eξ∫e^-txZn(dx), with Zn denoting the counting measure of particles of generation n, and Eξ the conditional expectation given the environment ξ. We find necessary and sufficient conditions for the existence of quenched moments and weighted moments of W, when W is non-degenerate. 展开更多
关键词 branching RANDOM WALK RANDOM ENVIRONMENT quenched MOMENTS WEIGHTED MOMENTS
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MOMENTS OF CONTINUOUS-STATE BRANCHING PROCESSES IN LEVY RANDOM ENVIRONMENTS 预览
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作者 季丽娜 郑祥祺 《数学物理学报:B辑英文版》 SCIE CSCD 2019年第3期781-796,共16页
For continuous-state branching processes in Levy random environments, the recursion of n-moments and the equivalent condition for the existence of general f-moments are established, where f is a positive continuous fu... For continuous-state branching processes in Levy random environments, the recursion of n-moments and the equivalent condition for the existence of general f-moments are established, where f is a positive continuous function satisfying some standard conditions. 展开更多
关键词 Branching processes continuous-state MOMENTS RANDOM environment STOCHASTIC equations
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Comparison of Five Endogenous Reference Genes for Specific PCR Detection and Quantification of Rice 预览
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作者 ZHANG Xiujie JIN Wujun +4 位作者 XU Wentao LI Xiaying SHANG Ying LI Sha OUYANG Hongsheng 《水稻科学:英文版》 CSCD 2019年第4期248-256,I0006,I0007共11页
Endogenous reference genes (ERGs) provide vital information regarding genetically modified organisms (GMOs). The successful detection of ERGs can identity GMOs and the source of genes, verify stability and reliability... Endogenous reference genes (ERGs) provide vital information regarding genetically modified organisms (GMOs). The successful detection of ERGs can identity GMOs and the source of genes, verify stability and reliability of the detection system, and calculate the level of genetically modified (GM) ingredients in mixtures. The reported ERGs in rice include sucrose-phosphate synthase (SPS), phospholipase D (PLD), RBE4 and rice root-specific GOS9 genes. Based on the characteristics of ERGs, a new ERG gene, phosphoenolpyruvate carboxylase (PEPC), was selected, and further compared with the four existing genes. A total of 18 rice varieties and 29 non-rice crops were used to verify the interspecies specificity, intraspecies consistency, sensitivity, stability and reliability of these five ERGs using qualitative and quantitative PCR. Qualitative detection indicated that SPS and PEPC displayed sufficient specificity, and the detection sensitivity was 0.05% and 0.005%, respectively. Although the specificity of both RBE4 and GOS9 were adequate, the amplicons were small and easily confused with primer dimers. Non-specific amplification of the PLD gene was present in maize and potato. Real-time quantitative PCR detection indicated that PLD, SPS and PEPC displayed good specificity, with R2 of the standard curve greater than 0.98, while the amplification efficiency ranged between 90% and 110%. Both the detection sensitivities of PLD and PEPC were five copies and that of SPS was ten copies. RBE4 showed typical amplification in maize, beet and Arabidopsis, while GOS9 was found in maize, tobacco and oats. PEPC exhibited excellent detection sensitivity and species specificity, which made it a potentially useful application in GM-rice supervision and administration. Additionally, SPS and PLD are also suitable for GM-rice detection. This study effectively established a foundation for GMO detection, which not only provides vital technical support for GMO identification, but also is of great significance for enhancing the comparability o 展开更多
关键词 ENDOGENOUS reference GENE RICE genetically modified crop PHOSPHOENOLPYRUVATE CARBOXYLASE GENE sucrose-phosphate synthase GENE phospholipase D GENE starch branching enzyme 4 GENE RICE root-specific GOS9 GENE
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Evidence for the decays of ∧c^+→∑^+η and ∑^+η’
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作者 麦迪娜 M.N.Achasov +146 位作者 S.Ahmed M.Albrecht M.Aleksee A.Amoroso 安芬芬 安琪 白羽 O.Bakina R. Baldini Ferroli 班勇 K.Begzsuren D.W.Bennett J.V.Bennett N.Berger M.Bertani D.Bettoni F.Bianchi I.Boyko R.A.Briere 蔡浩 蔡啸 O.Cakir A.Calcaterra 曹国富 S.A.Cetin J.Chai 常劲帆 W.L.Chang G.Chelkov 陈刚 陈和生 陈江川 陈玛丽 陈平亮 陈申见 陈元柏 成伟帅 G.Cibinetto F.Cossio 代洪亮 代建平 A.Dbeyssi D.Dedovich 邓子艳 A.Denig I.Denysenko M.Destefanis F.De Mori 丁勇 董超 董静 董燎原 董明义 豆正磊 杜书先 段鹏飞 范荆州 方建 房双世 方易 R.Farinelli L.Fava S.Fegan F.Feldbauer G.Felici 封常青 M.Fritsch 傅成栋 付颖 高清 高鑫磊 高原宁 高勇贵 高榛 B.Garillon I.Garzia A.Gilman K.Goetzen 龚丽 龚文煊 W.Gradl M.Greco 谷立民 顾旻皓 顾运厅 郭爱强 郭立波 郭如盼 郭玉萍 A.Guskov Z.Haddadi 韩爽 郝喜庆 F.A.Harris 何康林 F.H.Heinsius T.Held 衡月昆 侯治龙 胡海明 胡继峰 胡涛 胡誉 黄光顺 黄金书 黄性涛 黄晓忠 黄智玲 T.Hussain N.Hu sken W.Ikegami Andersson M.Irshad 纪全 姬清平 季晓斌 季筱璐 江晓山 蒋兴雨 焦健斌 焦铮 金大鹏 金山 金毅 T.Johansson A.Julin N.Kalantar-Nayestanaki 康晓珅 M.Kavatsyuk 柯百谦 I.K.Keshk T.Khan A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kornicer M.Kuemmel M.Kuessner A.Kupsc M.Kurth W.Kuhn J.S.Lange P.Larin L.La 《中国物理C:英文版》 SCIE CAS CSCD 2019年第8期15-23,共9页
We study the hadronic decays of ∧c^+ to the final states ∑^+η and ∑^+η, using an e^+e^- annihilation data sample of 567 pb^-1 taken at a center-of-mass energy of 4.6 GeV with the BESIII detector at the BEPCII col... We study the hadronic decays of ∧c^+ to the final states ∑^+η and ∑^+η, using an e^+e^- annihilation data sample of 567 pb^-1 taken at a center-of-mass energy of 4.6 GeV with the BESIII detector at the BEPCII collider. We find evidence for the decays ∧^+→∑^+η and ∑^+η' and with statistical significance of and , respectively. Normalizing to the reference decays ∧^+→∑^+π^0 and ∑^+ω, we obtain the ratios of the branching fractions B(∧C^+→∑^+η)/V(∧^→∑^+π^0)and B(∧C^+→∑^+η)/B(∧C^+→∑^+ω)to be and , respectively. The upper limits at the 90% confidence level are set to be B(∧C^→∑^+η)/V(∧^+→∑^+π^0)<0.58 and B(∧C^+→∑^+η)/B(∧C^+→∑^+ω)<1.2. Using BESIII measurements of the branching fractions of the reference decays, we determine B(∧C^+→∑^+η)=(0.41±019±0.05)%(<0.68%) and B(∧C^+→∑^+η)=(1.34+0.53+0.19)%(<1.9%). Here, the first uncertainties are statistical and the second systematic. The obtained branching fraction of ∧C^+→∑^+η is consistent with the previous measurement, and the branching fraction of ∧C^+→∑^+η is measured for the first time. 展开更多
关键词 charmed BARYON ∧c^+ DECAYS branching FRACTIONS
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