STAR-RIS辅助无线供能通信网络的优化

提出一种基于可同时透射和反射的可重构智能表面(STAR-RIS)辅助的无线供能通信网络,其中两个传感器节点组(SNG)利用供电站(PS)的无线能量信号采集能量,并利用所获取的能量将其信息发送至接入点(AP). STAR-RIS部署在两个SNG的中间,为无线能量和信息传输提供帮助.通过联合优化STAR-RIS的相移参数和通信资源分配以实现系统吞吐量最大化.由于优化问题的非凸性,采用块坐标下降法对问题进行求解.通过引入辅助变量并利用连续凸逼近和罚函数等方法将原问题转化为凸问题进行求解.实验结果表明,提出的通信方案可以为系统提供更高的性能增益.

基于StarGAN-VC的语音风格转换技术

文章基于星型生成式对抗网络-语音转换(Star Generative Adversarial Networks-Voice Conversion,StarGAN-VC)模型,研究了一种先进的语音风格转换技术,旨在实现对语音信号的高效转换。首先,详细阐述了基于StarGAN-VC的语音转换方法的基本原理。其次,深入研究特征提取和基频转换方法,以及StarGAN-VC模型的数学原理。最后,通过在VCC2018数据集上的实验,验证了该方法的性能。实验结果表明,该方法在频谱包络相似度和基频准确度等指标上均取得了令人满意的效果。

Comparative Study of Valency-Based Topological Descriptor for Hexagon Star Network

A class of graph invariants referred to today as topological indices are inefficient progressively acknowledged by scientific experts and others to be integral assets in the depiction of structural phenomena.The structure of an interconnection network can be represented by a graph.In the network,vertices represent the processor nodes and edges represent the links between the processor nodes.Graph invariants play a vital feature in graph theory and distinguish the structural properties of graphs and networks.A topological descriptor is a numerical total related to a structure that portray the topology of structure and is invariant under structure automorphism.There are various uses of graph theory in the field of basic science.The main notable utilization of a topological descriptor in science was by Wiener in the investigation of paraffin breaking points.In this paper we study the topological descriptor of a newly design hexagon star network.More preciously,we have computed variation of the Randic0 R0,fourth Zagreb M4,fifth Zagreb M5,geometric-arithmetic GA;atom-bond connectivity ABC;harmonic H;symmetric division degree SDD;first redefined Zagreb,second redefined Zagreb,third redefined Zagreb,augmented Zagreb AZI,Albertson A;Irregularity measures,Reformulated Zagreb,and forgotten topological descriptors for hexagon star network.In the analysis of the quantitative structure property relationships(QSPRs)and the quantitative structure activity relationships(QSARs),graph invariants are important tools to approximate and predicate the properties of the biological and chemical compounds.We also gave the numerical and graphical representations comparisons of our different results.

Fiber-based joint time and frequency dissemination via star-shaped commercial telecommunication network

A fiber-based, star-shaped joint time and frequency dissemination scheme is demonstrated. By working in cooperation with the existing commercial telecommunication network. Our scheme enables the frequency, time, and digital data networks to be integrated together and could represent an ideal option of interconnection among scientific institutions.The compensation functions of the time and frequency transfer scheme are set at the client nodes. The complexity of the central node is thus reduced, and future expansion by the addition of further branches will be accomplished more easily.During a performance test in which the ambient temperature fluctuation is 30℃/day, timing signal dissemination stability is achieved to be approximately ±50 ps along 25-km-long fiber spools. After calibration, a timing signal synchronization accuracy of 100 ps is also realized. The proposed scheme offers an option of the construction of large-scale fiber-based frequency and time transfer networks.

PREPARATION OF STAR NETWORK PEG-BASED GEL POLYMER ELECTROLYTES FOR ELECTROCHROMIC DEVICES

An amorphous,colorless,and highly transparent star network polymer with a pentaerythritol core linking four PEG-block polymeric arms was synthesized from the poly(ethylene glycol)(PEG),pentaerythritol,and dichloromethane by Williamson reaction.FTIR and ~1H-NMR measurement demonstrated that the polymer repeating units were C[CH_2-OCH_2O-(CH_2CH_2O)_m-CH_2O-(CH_2CH_2O)_n-CH_2O]_4.The polymer host held well mechanical properties for pentaerythritol cross-linking.The gel polymer electrolytes based on Lithium pe...

Starants: A New Model for Human Networks

In this paper, we will explain the relevance of the starant graphs, graphs created by us in the year of 2002. They were basically circulant graphs with a star graph that connects to all the vertices of the circulant graphs from inside of them, but they did not exist as a separate object of study in the year of 2002, as for all we knew. We now know that they can be used to model even social networking interactions, and they do that job better than any other graph we could be trying to use there. With the development of our mathematical tools, lots of conclusions will be made much more believable and therefore will become much more likely to get support from the relevant industries when attached to new queries.

Impact of Channel Dynamics, Combined Nonlinearities and ASE Noise on Transmission Performance of all Optical Star WDM Networks

For all optical Wavelength Division Multiplexing (WDM) network based on G.653 fibers, we investigate the quality factor deterioration due to combined nonlinear effects and Amplified spontaneous emission (ASE) noise for system parameters based on ITU-T Recommendation G.692. The investigation: (a) emphasizes on stimulated Raman scattering (SRS) and four wave mixing (FWM) effects which are the dominant nonlinearities known to limit WDM system performance and (b) accounts for beating between nonlinearities and beating between ASE noise and nonlinearities. Using the proposed model, performance of the worst affected channels due to SRS and FWM is compared and the results indicate that the worst affected channel due to SRS performs better and hence must be preferred for reliable and efficient transmission over the worst affected channel due to FWM. Further, the results suggest that to achieve a desired error rate (quality factor);there exists an optimal value of channel spacing for a given number of channels. The proposed theoretical model is also validated through extensive simulations over Rsoft OptSimTM simulator and the two sets of results are found to match, indicating that the proposed model accurately calculates the quality factor of the all optical WDM network.

Star-countable Networks and Locally S-Countable Networks

The concept of local s-countablity is introduced, and the relations between locally s-countable collections and star-countable collections are discussed.

基于城市复合网络的出行交通分配组合模型研究

文章提出了一种交通分配组合模型,解决传统四阶段方法缺乏联系导致误差逐渐放大的问题。文章基于构建的城市复合网络,将交通方式划分和交通分配整合在一起,综合考虑交通方式选择和交通分配的影响。通过基于A*算法的备选路径集查找方法,求解给定OD上的k短路径情况。采用广义费用公式对多方式出行效用进行计算,将费用、时间和换乘行为进行统一量化。最后,建立交通方式划分与交通分配组合模型,采用多层次迭代平衡求解,优化交通方式分担率。算例分析验证了组合模型在流量分配方面的优势,具有更好的路段流量均衡性和较低的阻抗时间。该模型可为城市交通规划和出行预测提供参考。

青年人才在网红村运营中的作用及其实现机制研究——基于行动者网络的视角

近年来,我国许多地区的乡村物质环境建设取得了巨大的成就,但是这些美丽乡村普遍面临同质化严重、依赖政府财政投入、闲置资源无法有效盘活等难题,亟须借助乡村运营来突破发展瓶颈。基于行动者网络的视角,以浙江安吉红庙村“深蓝计划”项目为例,对青年人才引导下的行动者联盟构成及作用机制进行解析。研究表明:青年人才作为特殊行动者,引导村集体、村民、政府、游客、网民和社交平台等异质行动者,在虚实网络空间中通过转译完成了村庄存量资源到“现金流”资产的蜕变,展现出更好的内生性、灵活性和创造性,但同时也暴露了一系列问题。帮助青年人才等有为精英更好地“嵌入”乡村治理,壮大以村集体、村民为核心的内生力量将是乡村运营的重要议题。

多源非对称星型量子网络及其非定域性

作为Bell定理的一种推广,基于多纠缠源的量子网络及其非定域性被人们广泛关注。本文基于独立源假设研究多源星型量子网络,构建具有5个独立源和8个节点的非对称星型网络模型,并探究其量子非定域性。结果表明,对于分发到网络节点的一组指定的纠缠纯态,该量子网络模型下得到的5-local定域关联不等式将会被违背,当前量子网络模型具有明显的非定域特性。

双态噪声驱动的分数阶星型耦合网络的随机共振

本文研究了一类分数阶星型耦合网络模型的随机共振行为,该网络由一个中心粒子和多个耦合粒子组成,其中粒子的耦合强度受到双态噪声的扰动.本文将耦合粒子运动轨迹的算术平均值定义为系统的平均场,然后分别讨论了中心粒子和平均场的统计特征和共振行为.利用随机平均法及变换技巧,本文首先推导了中心粒子和平均场的一阶稳态矩和稳态响应振幅的表达式,然后分析了中心粒子和平均场的运动轨迹的一致性条件以及耦合粒子的同步条件,最后数值研究了中心粒子和平均场的共振行为.仿真结果显示,网络存在丰富的共振行为:中心粒子和平均场的稳态响应均可能出现“单峰共振”“单峰-单谷共振”“单谷-单峰共振”及“逆共振”等共振行为,说明中心粒子和平均场的稳态响应对参数的依赖性很高.此外,本文还基于中心粒子和平均场的稳态响应振幅给出了模型的共振区.本研究可望为分数阶星型网络共振行为的控制提供理论基础.

From masses and radii of neutron stars to EOS of nuclear matter through neural network

The equation of state(EOS)of dense nuclear matter is a key factor for determining the internal structure and properties of neutron stars.However,the EOS of high-density nuclear matter has great uncertainty,mainly because terrestrial nuclear experiments cannot reproduce matter as dense as that in the inner core of a neutron star.Fortunately,continuous improvements in astronomical observations of neutron stars provide the opportunity to inversely constrain the EOS of high-density nuclear matter.Several methods have been proposed to implement this inverse constraint,including the Bayesian analysis algorithm,the Lindblom’s approach,and so on.Neural network algorithm is an effective method developed in recent years.By employing a set of isospin-dependent parametric EOSs as the training sample of a neural network algorithm,we set up an effective way to reconstruct the EOS with relative accuracy using a few mass-radius data.Based on the obtained neural network algorithms and according to the NICER observations on masses and radii of neutron stars with assumed precision,we obtain the inversely constrained EOS and further calculate the corresponding macroscopic properties of the neutron star.The results are basically consistent with the constraint on EOS in Huth et al.[Nature 606,276(2022)]based on Bayesian analysis.Moreover,the results show that even though the neural network algorithm was obtained using the finite parameterized EOS as the training set,it is valid for any rational parameter combination of the parameterized EOS model.

Star网络S_6的Hamilton圈分解

Star网络Sn作为超立方体(一种著名互连网络)的替代品而被许多作者研究.与超立方体相比较,该网络有较小的直径和顶点度.在本文中,我们证明了关于Star网络Sn的一个猜想当n=6时是正确的,即S6是两个边不交的Hamilton圈及一个完美对集的并.

无人车载网络高可靠HUB的设计

为满足无人车技术的不断发展及日趋复杂的车载网络带来的高带宽和高可靠性的使用要求,设计一种车载网络集线器(HUB)。采用时间触发协议(TTP),设计时间触发以太网(TTE)加星型TTP总线的架构。TTE提高数据带宽,在物理层与驱动设备采用点对点的连接方式代替总线型通信方式,提高可靠性,解决总线型通信方式一点断开,整体通信失效的问题。针对HUB的设计做详细阐述,通过实验验证了设计的可行性和可靠性,对车载网络的优化提供了可行的解决途径。

基于多图超分辨率重建的精细导星仪星点质心定位精度提升方法

精细导星仪的星点质心定位精度决定了空间天文望远镜的视轴姿态解算精度,为了提升精细导星仪的星点质心定位精度,提出了一种基于深度小波循环神经网络的星图超分辨率重建方法。首先,借助微扫描技术获取亚像素错位低分辨率星图序列,采用小波编码器提取低分辨率星图的小波域特征,通过小波系数约束低分辨率星图的噪声,并将亚像素错位星图序列配准过程融入到网络学习中。其次,利用卷积门循环神经单元对所提取的多星图序列特征进行融合。最后,使用逆小波解码器对多特征融合模块输出的小波域特征进行解码,从而实现基于低分辨率星图序列的去噪与超分辨率重建。实验结果表明,分别采用平方加权质心法求取原始星图和超分辨率重建后星图中的各星点的质心位置,相比于前者,后者的各星点平均质心定位精度和稳定度在X方向分别提升了64.76%和19.15%,在Y方向分别提升了75.35%和26.14%。

N-Star网络中最优的点到多点平行路由算法

Ｃｈｅｎ等研究了ｎ－Ｓｔａｒ网络中的点到多点并行路由问题，对前人的工作做了很大的改进，给出了一个几乎最优的时间复杂度为Ｏ（ｎ２）的算法．由Ｃｈｅｎ的算法所给出的ｎ－１条路Ｐ２，…，Ｐｎ满足｜Ｐｉ｜ｄｉｓｔ（ｖ１，ｖｉ）＋６，其中Ｐｉ是连接ｖｉ到ｖ１的路，｜Ｐｉ｜表示路Ｐｉ的长度，ｄｉｓｔ（ｖ１，ｖｉ）表示ｖｉ到ｖ１的最短路的长度．作者进一步改进了Ｃｈｅｎ等的结果，给出了一个新的时间复杂度仍为Ｏ（ｎ２）的算法，然而该算法给出的内部无交路Ｐ２，…，Ｐｎ满足｜Ｐｉ｜ｄｉｓｔ（ｖ１，ｖｉ）＋４（２ｉｎ），而且无论在时间上还是在生成路的长度上，均是最优的．

粉丝与明星网络交往失范现象思考

科学技术的发展推动交往形态转变,粉丝打破传统的以血缘、地域为联系的基本交往形式,通过网络社交营造与明星互动的新话语权。从粉丝为偶像打投“倒奶”,到粉丝狂言“劫法场”,粉丝与明星的网络交往已然由示范走向失范。粉丝与明星交往失范是交往价值标准、偶像产业结构、粉丝心理机制、交往方式变革等诸多因素共同作用的结果。规范粉丝与明星的网络交往行为,重回大众对其示范性的期许,需要在规范网络交往的基础上协同多方合力治理,最终重塑行业标准,重回风清气正的娱乐圈生态。

米字形高铁网对区域社会经济高质量发展的影响

以全国首个米字形高铁网为研究对象,从空间格局、经济发展、社会发展及生态环境这4个维度分析其对区域高质量发展的影响;构建影响评价模型,建立多维度指标评价体系,并对影响效果进行量化分析。结果表明:米字形高铁网建成开通,使河南省际和省内加权平均旅行时间大幅缩短至4.90 h和1.62 h,改善幅度达到65.6%和37.8%;区域联系强度显著增强,逐步形成以省内联系为主,向东北及东南方向稳步拓展的“中心-外围”式发展结构;郑州高铁枢纽首位度由1.90稳步升至2.83,核心枢纽地位进一步巩固;采用双重差分模型验证了米字形高铁网对河南省各地市社会固定资产投资、外资利用规模、人均GDP、城镇化率及就业升级指数等经济和社会发展指标均具有正向促进作用;铁路客运综合能耗优化量和综合营运减排量稳步提升,工业废气SO2排放量降低,生态环境效果显著。