群体智能对产业集群自适应行为描述的研究

侧重研究了产业集群的自适应行为的描述,借鉴群集智能的理论算法来描述集群中的典型自适应行为,具体包括改进蚁群分工模型用于描述集群核心能力的自适应形成行为、改进蚁群合作搬运模型用于描述集群中自适应合作行为和借鉴蚁群算法中信息素思想描述集群中的自适应竞争行为,这些自适应行为模型将为进一步形成产业集群的建模仿真提供了基础．     

Sr_3Al_2O_6∶Tb~(3+),Yb~(3+)荧光粉的近红外量子剪裁效应

硅材料带隙与太阳光子光谱的失配导致了比较严重的光子损失,大大降低了硅太阳能电池的效率。为了减少入射光子的损失,可以利用具有近红外量子剪裁效应的光谱转换材料来提高硅太阳能电池的效率。本研究采用溶胶凝胶法制备了Sr_3Al_2O_6∶Tb~(3+),Yb~(3+)荧光粉,并研究了其近红外量子剪裁效应。实验结果表明:在320 nm的紫外光激发下,Sr_3Al_2O_6∶Tb~(3+),Yb~(3+)荧光粉发射出Tb~(3+):5D4→~7F_j的可见光;另外,由于Tb~(3+)、Yb~(3+)离子之间的合作能量传递,得到了Yb~(3+):~7F_(5/2)→7F7/2的近红外发光。荧光寿命衰减证明Tb~(3+)到Yb~(3+)之间的确存在合作能量传递,而且存在量子剪裁效应,其中,能量传递效率为35.9%,量子剪裁效率为135.9%。由于Yb~(3+)的发射光谱与硅太阳能电池的吸收匹配,Sr_3Al_2O_6∶Tb~(3+),Yb~(3+)荧光粉有可能作为潜在的光谱转换材料应用于硅太阳能电池以提高其光电转换效率。     

多选择NTU结构对策下的社会稳定核心

本文研究了多选择情形下NTU结构对策及其社会稳定核心的理论和应用。定义了多选择NTU结构对策的转移率规则和支付依赖平衡性质,给出了K-K-M-S定理在多选择NTU结构对策下的一个扩展形式,并用扩展后的K-K-M-S定理证明了如果转移率规则包含某些力量函数值,且多选择NTU结构对策关于转移率规则是支付依赖平衡的,则多选择NTU结构对策的社会稳定核心是非空的。     

A computational study of interplay between hydride bonding and cation–π interactions: H-Mg-H···X···Y triads (X = Li+, Na+, Y = C2H2, C2H4, C6H6) as model systems

In the present study, H-Mg-H···X···Y (X = Li⁺, Na⁺ and Y = C₂H₂, C₂H₄, C₆H₆) triads have been investigated at MP2/6-311++G(2d,2p) computational level to characterise cooperative effects between hydride bonding and cation–π interactions. Molecular geometries, binding energies, cooperative energies and many-body interaction energies were evaluated. The diminutive energy values in triads with Li⁺ are larger than respective values in triads with Na⁺. The electronic properties of the complexes are analysed using parameters derived from the quantum theory of atoms in molecules methodology.     

分布式协同动态任务规划的建模与一体化求解方法

以多异构无人机执行侦查、打击、评估任务为背景,开展了协同任务规划问题建模、一体化求解算法设计。采用分布式规划框架及图论思想对问题进行建模,且将无人机避碰、燃油、任务执行次序作为约束条件,并充分考虑任务分配与路径规划存在的强耦合特性,采用禁忌/遗传算法,设计包含任务序列和路径位姿点的基因编码,将问题进行一体化求解。结果表明:算法能够适用于动态任务场景,且能够较为快速地解决任务空间较为复杂的规划问题。     

Synthesis of fullerodendrons with an ammonium unit at the focal point and their cooperative self-assembly on a fluorescent ditopic crown ether receptor

Dendritic branches with 1, 2, or 4 peripheral fullerene subunits and an ammonium function at the focal point have been prepared. Their ability to form self-assembled dendritic structures with oligophenylenevinylene receptors bearing one or two crown ether moieties has been evidenced by ES-MS studies for the first time. These supramolecular complexes are multicomponent photoactive devices in which the emission of the central receptor is dramatically quenched by the fullerene units. This new property resulting from the association of the different molecular subunits allowed detailed investigations of the self-assembly process by means of fluorescence titrations. The binding studies have revealed positive cooperative effects for the assembly of the fullerodendrimers with the ditopic receptor. Interestingly, the stability of the supramolecular 2:1 structures increases as the size of the dendritic unit increases. This positive dendritic effect has been explained by the larger number of possible intramolecular fullerene-fullerene interactions between the two dendritic guests when the number of fullerene subunits is increased.     

A note on non-existence results for semi-linear cooperative elliptic systems via moving spheres

In this note, we extend some earlier non-existence, monotonicity and one-dimensionality results of W. Reichel and the author, by replacing the local Lipschitz continuity hypothesis on the non-linearities by a so-called boundedly uniform Lipschitz condition in the magnitude of .

     

Polyfunctional Bis‐Lewis‐Acid‐/Bis‐Triazolium Catalysts for Stereoselective 1,4‐Additions of 2‐Oxindoles to Maleimides

Achieving enzyme‐like catalytic activity and stereoselectivity without the typically high substrate specificity of enzymes is a challenge in the development of artificial catalysts for asymmetric synthesis. Polyfunctional catalysts are considered to be a promising tool for achieving excellent catalytic efficiency. A polyfunctional catalyst system was developed, which incorporates two Lewis acidic/Brønsted basic cobalt centers in combination with triazolium moieties that are crucial for high reactivity and excellent stereoselectivity in the direct 1,4‐addition of oxindoles to maleimides. The catalyst is assembled through click chemistry and is readily recyclable through precipitation by making use of its charges. Kinetic studies support a cooperative mode of action. Diastereodivergency is achievable with either Boc‐protected or unprotected maleimide.     

Coexisting Cooperative Cognitive Micro‐/Nanorobots

Interaction behaviors are a crucial, distinctive feature of organisms in ecological systems. Inspired by nature, micro‐/nanorobots also show interaction behaviors with a significant number of novel and advanced functionalities. The micro‐/nanoscale size and self‐driven abilities of micro‐/nanorobots have attracted considerable attention for potential applications. The mission of micro‐/nanorobots has evolved from basic mechanical transfer or assistance to a diverse range of complex tasks, such as targeted drug delivery, biosensing, and environmental remediation. Herein, we focus on the interaction behavior of coexisting cooperative cognitive (Tri‐Co) micro‐/nanorobots, summarize recent research, and classify the interactions into three broad types: with the environment, with robot peers, and with human external control.     

A fault-tolerant small world topology control model in ad hoc networks for search and rescue

Due to their self-organized, multi-hop and distributed characteristics, ad hoc networks are useful in search and rescue. Topology control models need to be designed for energy-efficient, robust and fast communication in ad hoc networks. This paper proposes a topology control model which specializes for search and rescue—Compensation Small World-Repeated Game (CSWRG)—which integrates mobility models, constructing small world networks and a game-theoretic approach to the allocation of resources. Simulation results show that our mobility models can enhance the communication performance of the constructed small-world networks. Our strategy, based on repeated game, can suppress selfish behavior and compensate agents that encounter selfish or faulty neighbors. This model could be useful for the design of ad hoc communication networks.