期刊文献+
共找到664篇文章
< 1 2 34 >
每页显示 20 50 100
一类特殊的完备左对称代数的导子与triple导子
1
作者 吴孟珂 吴明忠 《湖州师范学院学报》 2024年第2期1-7,共7页
利用导子和triple导子的定义,通过计算线性变换在一组基下的结果,得到与Abelian李代数相容的维数小于或等于4维的完备左对称代数的导子,以及triple导子的矩阵形式.
关键词 左对称代数 Abelian李代数 相容 导子 triple导子
下载PDF
The Triple Helix of innovation as a double game involving domestic and foreign actors
2
作者 Eustache Mêgnigbêto 《Journal of Data and Information Science》 CSCD 2024年第1期82-100,共19页
Purpose:The collaboration relationships between innovation actors at a geographic level may be considered as grouping two separate layers,the domestic and the foreign.At the level of each layer,the relationships and t... Purpose:The collaboration relationships between innovation actors at a geographic level may be considered as grouping two separate layers,the domestic and the foreign.At the level of each layer,the relationships and the actors involved constitute a Triple Helix game.The paper distinguished three levels of analysis:the global grouping together all actors,the domestic grouping together domestic actors,and the foreign related to only actors from partner countries.Design/methodology/approach:Bibliographic records data from the Web of Science for South Korea and West Africa breakdown per innovation actors and distinguishing domestic and international collaboration are analyzed with game theory.The core,the Shapley value,and the nucleolus are computed at the three levels to measure the synergy between actors.Findings:The synergy operates more in South Korea than in West Africa;the government is more present in West Africa than in South Korea;domestic actors create more synergy in South Korea,but foreign more in West Africa;South Korea can consume all the foreign synergy,which is not the case of West Africa.Research limitations:Research data are limited to publication records;techniques and methods used may be extended to other research outputs.Practical implications:West African governments should increase their investment in science,technology,and innovation to benefit more from the synergy their innovation actors contributed at the foreign level.However,the results of the current study may not be sufficient to prove that greater investment will yield benefits from foreign synergies.Originality/value:This paper uses game theory to assess innovation systems by computing the contribution of foreign actors to knowledge production at an area level.It proposes an indicator to this end. 展开更多
关键词 triple Helix Game theory Core Shapley value NUCLEOLUS South Korea West Africa
下载PDF
Study of plasma parameters of coaxial plasma source using triple Langmuir probe and Faraday cup diagnostics
3
作者 Sunil KANCHI Rohit SHUKLA Archana SHARMA 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第4期94-100,共7页
Coaxial plasma guns are a type of plasma source that produces plasma which propagates radially and axially controlled by the shape of the ground electrode, which has attracted much interest in several applications. In... Coaxial plasma guns are a type of plasma source that produces plasma which propagates radially and axially controlled by the shape of the ground electrode, which has attracted much interest in several applications. In this work, a 120° opening angle of CPG nozzle is used as a plasma gun configuration that operates at the energy of 150 J. The ionization of polyethylene insulator between the electrodes of the gun produces a cloud of hydrogen and carbon plasma.The triple Langmuir probe and Faraday cup are used to measure plasma density and plasma temperature. These methods are used to measure the on-axis and off-axis plasma divergence of the coaxial plasma gun. The peak values of ion densities measured at a distance of 25 mm on-axis from the plasma gun are(1.6±0.5)×10^(19)m^(-3)and(2.8±0.6)×10^(19)m^(-3)for hydrogen and carbon plasma respectively and the peak temperature is 3.02±0.5 eV. The mean propagation velocity of plasma is calculated using the transit times of plasma at different distances from the plasma gun and is found to be 4.54±0.25 cm/μs and 1.81±0.18 cm/μs for hydrogen and carbon plasma respectively. The Debye radius is obtained from the measured experimental data that satisfies the thin sheath approximation. The shot-to-shot stability of plasma parameters facilitates the use of plasma guns in laboratory experiments. These types of plasma sources can be used in many applications like plasma opening switches, plasma devices, and as plasma sources. 展开更多
关键词 coaxial plasma source triple Langmuir probe Faraday cup plasma density plasma temperature
下载PDF
A novel triple periodic minimal surface-like plate lattice and its data-driven optimization method for superior mechanical properties
4
作者 Yanda WANG Yanping LIAN +2 位作者 Zhidong WANG Chunpeng WANG Daining FANG 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2024年第2期217-238,共22页
Lattice structures can be designed to achieve unique mechanical properties and have attracted increasing attention for applications in high-end industrial equipment,along with the advances in additive manufacturing(AM... Lattice structures can be designed to achieve unique mechanical properties and have attracted increasing attention for applications in high-end industrial equipment,along with the advances in additive manufacturing(AM)technologies.In this work,a novel design of plate lattice structures described by a parametric model is proposed to enrich the design space of plate lattice structures with high connectivity suitable for AM processes.The parametric model takes the basic unit of the triple periodic minimal surface(TPMS)lattice as a skeleton and adopts a set of generation parameters to determine the plate lattice structure with different topologies,which takes the advantages of both plate lattices for superior specific mechanical properties and TPMS lattices for high connectivity,and therefore is referred to as a TPMS-like plate lattice(TLPL).Furthermore,a data-driven shape optimization method is proposed to optimize the TLPL structure for maximum mechanical properties with or without the isotropic constraints.In this method,the genetic algorithm for the optimization is utilized for global search capability,and an artificial neural network(ANN)model for individual fitness estimation is integrated for high efficiency.A set of optimized TLPLs at different relative densities are experimentally validated by the selective laser melting(SLM)fabricated samples.It is confirmed that the optimized TLPLs could achieve elastic isotropy and have superior stiffness over other isotropic lattice structures. 展开更多
关键词 lattice structure triple periodic minimal surface(TPMS) plate lattice structural optimization machine learning
下载PDF
Enhancing Relational Triple Extraction in Specific Domains:Semantic Enhancement and Synergy of Large Language Models and Small Pre-Trained Language Models
5
作者 Jiakai Li Jianpeng Hu Geng Zhang 《Computers, Materials & Continua》 SCIE EI 2024年第5期2481-2503,共23页
In the process of constructing domain-specific knowledge graphs,the task of relational triple extraction plays a critical role in transforming unstructured text into structured information.Existing relational triple e... In the process of constructing domain-specific knowledge graphs,the task of relational triple extraction plays a critical role in transforming unstructured text into structured information.Existing relational triple extraction models facemultiple challenges when processing domain-specific data,including insufficient utilization of semantic interaction information between entities and relations,difficulties in handling challenging samples,and the scarcity of domain-specific datasets.To address these issues,our study introduces three innovative components:Relation semantic enhancement,data augmentation,and a voting strategy,all designed to significantly improve the model’s performance in tackling domain-specific relational triple extraction tasks.We first propose an innovative attention interaction module.This method significantly enhances the semantic interaction capabilities between entities and relations by integrating semantic information fromrelation labels.Second,we propose a voting strategy that effectively combines the strengths of large languagemodels(LLMs)and fine-tuned small pre-trained language models(SLMs)to reevaluate challenging samples,thereby improving the model’s adaptability in specific domains.Additionally,we explore the use of LLMs for data augmentation,aiming to generate domain-specific datasets to alleviate the scarcity of domain data.Experiments conducted on three domain-specific datasets demonstrate that our model outperforms existing comparative models in several aspects,with F1 scores exceeding the State of the Art models by 2%,1.6%,and 0.6%,respectively,validating the effectiveness and generalizability of our approach. 展开更多
关键词 Relational triple extraction semantic interaction large language models data augmentation specific domains
下载PDF
Upper and Lower Bounds of the α-Universal Triple I Method for Unified Interval Implications
6
作者 Yiming Tang Jianwei Gao Yifan Huang 《Computers, Materials & Continua》 SCIE EI 2024年第4期1063-1088,共26页
Theα-universal triple I(α-UTI)method is a recognized scheme in the field of fuzzy reasoning,whichwas proposed by our research group previously.The robustness of fuzzy reasoning determines the quality of reasoning al... Theα-universal triple I(α-UTI)method is a recognized scheme in the field of fuzzy reasoning,whichwas proposed by our research group previously.The robustness of fuzzy reasoning determines the quality of reasoning algorithms to a large extent,which is quantified by calculating the disparity between the output of fuzzy reasoning with interference and the output without interference.Therefore,in this study,the interval robustness(embodied as the interval stability)of theα-UTI method is explored in the interval-valued fuzzy environment.To begin with,the stability of theα-UTI method is explored for the case of an individual rule,and the upper and lower bounds of its results are estimated,using four kinds of unified interval implications(including the R-interval implication,the S-interval implication,the QL-interval implication and the interval t-norm implication).Through analysis,it is found that theα-UTI method exhibits good interval stability for an individual rule.Moreover,the stability of theα-UTI method is revealed in the case of multiple rules,and the upper and lower bounds of its outcomes are estimated.The results show that theα-UTI method is stable for multiple rules when four kinds of unified interval implications are used,respectively.Lastly,theα-UTI reasoning chain method is presented,which contains a chain structure with multiple layers.The corresponding solutions and their interval perturbations are investigated.It is found that theα-UTI reasoning chain method is stable in the case of chain reasoning.Two application examples in affective computing are given to verify the stability of theα-UTImethod.In summary,through theoretical proof and example verification,it is found that theα-UTImethod has good interval robustness with four kinds of unified interval implications aiming at the situations of an individual rule,multi-rule and reasoning chain. 展开更多
关键词 Fuzzy reasoning the CRI method the triple I method fuzzy implication interval robustness
下载PDF
Triple points and phase transitions of D-dimensional dyonic Ad S black holes with quasitopological electromagnetism in Einstein–Gauss–Bonnet gravity
7
作者 牟平辉 蒋青权 +1 位作者 何柯腱 李国平 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第6期272-287,共16页
By considering the negative cosmological constant Λ as a thermodynamic pressure, we study the thermodynamics and phase transitions of the D-dimensional dyonic Ad S black holes(BHs) with quasitopological electromagnet... By considering the negative cosmological constant Λ as a thermodynamic pressure, we study the thermodynamics and phase transitions of the D-dimensional dyonic Ad S black holes(BHs) with quasitopological electromagnetism in Einstein–Gauss–Bonnet(EGB) gravity. The results indicate that the small/large BH phase transition that is similar to the van der Waals(vdW) liquid/gas phase transition always exists for any spacetime dimensions. Interestingly, we then find that this BH system exhibits a more complex phase structure in 6-dimensional case that is missed in other dimensions.Specifically, it shows for D = 6 that we observed the small/intermediate/large BH phase transitions in a specific parameter region with the triple point naturally appeared. Moreover, when the magnetic charge turned off, we still observed the small/intermediate/large BH phase transitions and triple point only in 6-dimensional spacetime, which is consistent with the previous results. However, for the dyonic Ad S BHs with quasitopological electromagnetism in Einstein–Born–Infeld(EBI) gravity, the novel phase structure composed of two separate coexistence curves observed by Li et al. [Phys. Rev. D105 104048(2022)] disappeared in EGB gravity. This implies that this novel phase structure is closely related to gravity theories, and seems to have nothing to do with the effect of quasitopological electromagnetism. In addition, it is also true that the critical exponents calculated near the critical points possess identical values as mean field theory. Finally, we conclude that these findings shall provide some deep insights into the intriguing thermodynamic properties of the dyonic Ad S BHs with quasitopological electromagnetism in EGB gravity. 展开更多
关键词 AdS black hole phase transition triple point
下载PDF
A Cross-Sectional Study on the Impact of Operation Triple Zero (OTZ) Program on Viral Load Suppression amongst Members of the Adolescent Club in 68 Nigerian Army Reference Hospital Yaba Lagos, Nigeria
8
作者 Nkechinyere Harrison Ismail Lawal +7 位作者 Yakubu Adamu Kehinde Aribisala Adegbenga Olarinoye Uzoamaka Agbaim Funmilayo Owolabi Dooshima Okonkwo Laura Chittenden Nathan Okeji 《World Journal of AIDS》 2024年第2期35-44,共10页
Background: In Nigeria, adolescents and young people (AYP) aged 10 - 24, comprise 22.3% of the population and with HIV prevalence of 3.5%. The AYP living with HIV enrolled at the 68 NARHY, Lagos reflects the national ... Background: In Nigeria, adolescents and young people (AYP) aged 10 - 24, comprise 22.3% of the population and with HIV prevalence of 3.5%. The AYP living with HIV enrolled at the 68 NARHY, Lagos reflects the national challenges with poor viral suppression. The OTZ program aligns with the UNAIDS 95-95-95 goals. It seeks to empower AYPLHIV to be in charge of their treatment and commit to triple zero outcomeszero missed appointments, zero missed drugs, and zero viral loads. The purpose of the study was to assess the impact of the OTZ program on viral load suppression among members of the adolescent club in 68 NARHY, Lagos. Method: A cross-sectional retrospective study to evaluate the impact of the OTZ program on the viral load of 53 AYP enrolled in the OTZ program between March 2019 to December 2019 was analyzed. The Percentage of viral load suppression before enrollment compared with 6 and 12 months after enrollment into the OTZ program. The AYP is grouped into 10 - 14, 15 - 19, and 20 - 24 years. Activities conducted were peer driven monthly meetings with the AYP during which the adolescents interacted on issues relating to improving their treatment outcomes, healthcare workers reviewed their clinical status, viral load result, provider peer counseling, and caregivers engagement to support adherence to medication and ARV refills. Results: Before OTZ, 81% aged 10 - 14 years, 75% aged 15 - 19 years, and 25% aged 20 - 24 years were virally suppressed (VL less than 1000 copies/ml). Six months after enrollment, 94% were virally suppressed95% aged 10 - 14 years, 96% aged 15 - 19 years, and 66% aged 20-24 years. Twelve months after enrollment, 96% of AYP were virally suppressed100% aged 10-14 years, 93% aged 15 - 19 years, and 100% aged 20 - 24 years. Males viral load (VL) suppression improved from 79% to 96% and 92%, while females VL suppression improved from 69% to 93% and 100% at 6 and 12 months respectively. Conclusion: The OTZ activities contributed to improved viral load suppression in the AYP of the facility. 展开更多
关键词 Impact Operation triple Zero ADOLESCENT Viral Load NIGERIA
下载PDF
ELEMENTARY AND Φ-FREE LIE TRIPLE SYSTEMS
9
作者 白瑞蒲 刘丽丽 Li Zhenheng 《Acta Mathematica Scientia》 SCIE CSCD 2012年第6期2322-2328,共7页
We introduce elementary and Ф-free Lie triple systems and study the properties of these systems. In particular, structures of subsystems of an elementary Lie triple system and a class of Ф-free Lie triple systems ar... We introduce elementary and Ф-free Lie triple systems and study the properties of these systems. In particular, structures of subsystems of an elementary Lie triple system and a class of Ф-free Lie triple systems are investigated. 展开更多
关键词 Lie triple system elementary Lie triple system Ф-free Lie triple system.
下载PDF
基于Triple Collocation方法的土壤湿度误差分析 被引量:6
10
作者 吴凯 舒红 +1 位作者 聂磊 焦振航 《国土资源遥感》 CSCD 北大核心 2018年第3期68-75,共8页
土壤湿度作为水循环中重要的驱动参数之一,对天气变化有着显著影响。遥感技术的发展促使土壤湿度的大范围动态性观测变为可能,但对其误差的准确估计仍需进一步的研究。利用ASCAT散射计、AMSR-E辐射计反演得到的2种卫星遥感土壤湿度数据... 土壤湿度作为水循环中重要的驱动参数之一,对天气变化有着显著影响。遥感技术的发展促使土壤湿度的大范围动态性观测变为可能,但对其误差的准确估计仍需进一步的研究。利用ASCAT散射计、AMSR-E辐射计反演得到的2种卫星遥感土壤湿度数据以及ERA-Interim土壤湿度再分析资料,通过三重组合(Triple Collocation,TC)方法得到了研究区域(15°N^55°N,73°E^135°E) 3种土壤湿度数据的误差方差和信噪比估计,并结合MODIS土地覆盖类型数据分析了3种土壤湿度数据的误差特征。结果表明:植被覆盖会影响遥感土壤湿度的TC误差方差估计;从TC误差方差估计值来看,ERA土壤湿度精度最高,AMSR-E精度次之,ASCAT精度最低;从信噪比来看,ASCAT土壤湿度信噪比最高,ERA的信噪比低于ASCAT高于AMSR-E,AMSR-E信噪比最低;通过研究区MODIS土地覆盖类型数据与TC结果的分析可知TC结果多分布在草原、农田和裸地,TC结果比较符合客观实际情况。 展开更多
关键词 土壤湿度 误差估计 triple COLLOCATION
下载PDF
素环上的Jordan Triple(α,α)-导子 被引量:2
11
作者 赵玉松 张才仙 +1 位作者 王茂波 吕世良 《应用泛函分析学报》 CSCD 2006年第1期57-60,共4页
证明了2-非挠素环上的Jordan trip le(,αα)-导子是(α,α)-导子.
关键词 JORDAN triple α)-导子 素环
下载PDF
三角代数上的Jordan-triple初等映射及Jordan同构 被引量:3
12
作者 魏妙 张建华 《纺织高校基础科学学报》 CAS 2009年第2期193-197,共5页
设U是三角代数,V为任意代数,证明了若映射M:U→V,M*:V→U为满射,并且满足Jordan-trip le初等映射的形式,则M,M*可加.并进一步讨论了映射M,M*在什么条件下具有Jordan同构形式.
关键词 三角代数 Jordan—triple初等映射 可加性 JORDAN同构
下载PDF
5维幂零李代数的triple导子与自同构群的结构 被引量:4
13
作者 巫永萍 周金森 梁俊平 《龙岩学院学报》 2017年第2期24-28,共5页
利用triple导子与自同构的定义,研究了特征不等于2的代数闭域上5维幂零李代数的triple导子与自同构群的结构。
关键词 幂零李代数 triple导子 自同构群
下载PDF
Differently implicational α-universal triple I restriction method of (1, 2, 2) type 被引量:5
14
作者 Yiming Tang Fuji Ren Yanxiang Chen 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2012年第4期560-573,共14页
From the viewpoints of both fuzzy system and fuzzy reasoning, a new fuzzy reasoning method which contains the α- triple I restriction method as its particular case is proposed. The previous α-triple I restriction pr... From the viewpoints of both fuzzy system and fuzzy reasoning, a new fuzzy reasoning method which contains the α- triple I restriction method as its particular case is proposed. The previous α-triple I restriction principles are improved, and then the optimal restriction solutions of this new method are achieved, especially for seven familiar implications. As its special case, the corresponding results of α-triple I restriction method are obtained and improved. Lastly, it is found by examples that this new method is more reasonable than the α-triple I restriction method. 展开更多
关键词 fuzzy reasoning fuzzy system triple I method triple Irestriction method compositional rule of inference method.
下载PDF
基于Triple DES与RSA的文件加密系统 被引量:3
15
作者 胡振 《计算机与现代化》 2012年第9期101-105,共5页
比较对称密码体制与非对称密码体制的特点,简述Triple DES算法与RSA算法的基本原理。在详细分析文件安全的相关问题和深入研究.NET Framework密码算法类的基础上,提出Triple DES算法与RSA算法结合运用的文件加密方案,设计系统的总体结... 比较对称密码体制与非对称密码体制的特点,简述Triple DES算法与RSA算法的基本原理。在详细分析文件安全的相关问题和深入研究.NET Framework密码算法类的基础上,提出Triple DES算法与RSA算法结合运用的文件加密方案,设计系统的总体结构和基本流程,并以VB.NET实现了基于Triple DES与RSA的文件加密系统。实践表明,用本系统进行文件加密简单而方便。 展开更多
关键词 triple DES算法 RSA算法 NET FRAMEWORK 文件 加密
下载PDF
严格上三角矩阵李代数的李triple导子代数 被引量:4
16
作者 王恒太 刘志泽 罗迪凡 《南华大学学报(自然科学版)》 2011年第3期66-67,71,共3页
研究严格上三角矩阵李代数N的李triple导子代数TDerN的结构,证明了它是一个可解李代数,并且给出了其导子代数DerN和李triple导子代数之间的维数差,从而证明了其导子代数是李triple导子代数的真子代数.
关键词 严格上三角矩阵李代数 李导子 triple导子
下载PDF
标准算子代数上广义Jordan triple可导映射 被引量:1
17
作者 张芳娟 《吉林大学学报(理学版)》 CAS CSCD 北大核心 2013年第2期203-206,共4页
设H是复数C上的Hilbert空间,AB(H)是标准算子代数.利用算子论方法,证明了对所有的A∈A,若δ满足δ(AA*A)=δ(A)A*A+Aδ(A)*A+AA*δ(A),则存在S,T∈B(H)和λ∈R,且S+S*=T+T*=λI,使得对所有的A∈A,有δ(A)=SA-AT.
关键词 标准算子代数 广义Jordan triple可导映射 线性映射
下载PDF
Banach代数上的高阶Jordan-triple导子系的广义Hyers-Ulam-Rassias稳定性 被引量:2
18
作者 刘莉君 《纯粹数学与应用数学》 CSCD 2011年第5期642-649,661,共9页
针对Banach代数上的高阶Jordan-triple导子系,基于与函数方程有关的广义的Hyers-Ulam-Rassias稳定性的原理.采用线性算子论的方法,结合广义的Jensen等式,证明了Banach代数上与高阶导子系有关的函数方程具有广义的Hyers-Ulam-Rassias稳定... 针对Banach代数上的高阶Jordan-triple导子系,基于与函数方程有关的广义的Hyers-Ulam-Rassias稳定性的原理.采用线性算子论的方法,结合广义的Jensen等式,证明了Banach代数上与高阶导子系有关的函数方程具有广义的Hyers-Ulam-Rassias稳定性.证明结果表明该方法实用性强,操作简便,从而提供了一种利用稳定性研究扰动问题的方法. 展开更多
关键词 BANACH代数 Jordan—triple导子系 Hyers—Ulam—Rassias稳定性
下载PDF
THE BANACH-LIE GROUP OF LIE TRIPLE AUTOMORPHISMS OF AN H^*-ALGEBRA^* 被引量:1
19
作者 A.J.Calderón Martín C.Martín González 《Acta Mathematica Scientia》 SCIE CSCD 2010年第4期1219-1226,共8页
We study the Banach-Lie group Ltaut(A) of Lie triple automorphisms of a complex associative H^*-algebra A. Some consequences about its Lie algebra, the algebra of Lie triple derivations of A, Ltder(A), are obtain... We study the Banach-Lie group Ltaut(A) of Lie triple automorphisms of a complex associative H^*-algebra A. Some consequences about its Lie algebra, the algebra of Lie triple derivations of A, Ltder(A), are obtained. For a topologically simple A, in the infinite-dimensional case we have Ltaut(A)0 = Aut(A) implying Ltder(A) = Der(A). In the finite-dimensional case Ltaut(A)0 is a direct product of Aut(A) and a certain subgroup of Lie derivations δ from A to its center, annihilating commutators. 展开更多
关键词 Banach-Lie group Lie triple automorphism Lie triple derivation
下载PDF
广义Jordan triple导子 被引量:1
20
作者 荆武 《烟台师范学院学报(自然科学版)》 1999年第3期161-163,167,共4页
证明了含单位元的2非挠半素环上的广义Jordan triple
关键词 半素环 广义导子 NEUMANN代数 约当triple导子
下载PDF
上一页 1 2 34 下一页 到第
使用帮助 返回顶部