Orbit consensus of quantum networks based on interaction design

For a general quantum network system with a non-zero Hamiltonian H composed of n identical m-level quantum subsystems, any symmetric consensus state in the interaction picture exactly corresponds to an orbit in the Schrödinger picture, which is called the H-orbit of the symmetric consensus state. By using the interaction picture transformation and the tool of the LaSalle invariance principle, this paper analyzes the orbit consensus of this quantum network and designs the corresponding swapping operators such that the system converges to the H-orbit of the target symmetric consensus state that exists in the interaction picture. In particular, we prove the convergence of the quantum network to the H-orbit when the quantum interaction graph is connected and the system Hamiltonian is permutation invariant. The orbit consensuses of a four-qubit network system and a quantum network of three identical three-level subsystems are achieved numerically, which verifies the correctness of our theoretical results and the effectiveness of the designed swapping operators.     

Optimal control of stochastic functional neutral differential equations with time lag in control

In this work, we consider an optimal control problem of a class of stochastic differential equations driven by additive noise with aftereffect appearing in control. We develop a semigroup theory of the driving deterministic neutral system and identify explicitly the adjoint operator of the corresponding infinitesimal generator. We formulate the time delay equation under consideration into an infinite dimensional stochastic control system without time lag by means of the adjoint theory established. Consequently, we can deal with the associated optimal control problem through the study of a Hamilton–Jacob–Bellman (HJB) equation. Last, we present an example whose optimal control can be explicitly determined to illustrate our theory.     

我国社区心理学研究述评

我国的心理学工作者越来越关注社区心理学,并开展了为数不少的理论与实证研究。首先阐明了社区心理学的产生、研究对象以及目标;随后着重介绍了我国社区心理学在不同样本人群中的研究成果;最后分析了我国社区心理学研究中存在的一些问题,展望了其在研究方法、研究内容等方面的发展趋势。     

图书馆面积规划的环境心理学因素分析

环境心理学主要从领域性、隐私及个人空间学说三个角度解释人的社会行为与空间的关系,它在建筑学、社会学、图书馆三个方面对图书馆面积规划活动施加着各种影响。     

导致信息茧房的多重因素及“破茧”路径

信息茧房问题虽然因个性化推荐算法等技术的发展而日益成为研究热点,但它所指向的人们的选择性心理带来的信息视野狭窄以及观点、立场固化等,并非新的现象。从新媒体传播来看,人们的视野与其获取信息的路径以及相关的信息过滤机制相关,社交网络、平台、算法等都有可能在一定程度上会固化人们的信息获取路径、强化人们的选择性心理,信息茧房的形成,是多种因素的共同作用。要破解信息茧房,同样需要依靠算法与平台的优化、信息供给侧的改进以及个体媒介素养提升等多方面的路径。