摘要：This paper studies the consensus problem of multi-agent systems in which all agents are modeled by a general linear system. The authors consider the case where only the relative output feedback between the neighboring agents can be measured. To solve the consensus problem, the authors first construct a static relative output feedback control under some mild constraints on the system model. Then the authors use an observer based approach to design a dynamic relative output feedback control. If the adjacent graph of the system is undirected and connected or directed with a spanning tree, with the proposed control laws, the consensus can be achieved. The authors note that with the observer based approach, some information exchange between the agents is needed unless the associated adjacent graph is completely connected.

摘要：表面等离子体激元(SPPs)对于下一代信息通信技术的发展至关重要.然而,SPPs器件固有的欧姆损耗限制了它们在片上光学通讯中的实际应用.本工作中,我们在合理设计的有机/金属纳米线异质结中实现了SPPs的损耗补偿及其在光学逻辑运算中的应用.通过将银纳米线(AgNWs)插入结晶有机微丝中来合成异质结构,并将其用作微米级光学增益介质.所制备的异质结具有较大的有机/金属界面面积,能确保从激子到SPPs的高效能量转移.异质结构中亚波长SPPs的增益是通过强烈限制SPPs的受激发射实现的.此外,我们还实现了SPPs的级联增益,并将其用于构建微纳光子学器件,例如Boolean逻辑单元.相关结果为具有SPPs增强功能的器件用于混合光子学回路提供了新的思路.

摘要：In order to study the failure process of an anchorage structure and the evolution law of the body’s deformation field,anchor push-out tests were carried out based on digital speckle correlation methods(DSCM).The stress distribution of the anchorage interface was investigated using the particle flow numerical simulation *** results indicate that there are three stages in the deformation and failure process of an anchorage structure:elastic bonding stage,a de-bonding stage and a failure *** stress distribution in the interface controls the stability of the *** the elastic bonding stage,the shear stress peak point of the interface is close to the loading end,and the displacement field gradually develops into a‘‘V’’*** the de-bonding stage,there is a shear stress plateau in the center of the anchorage section,and shear strain localization begins to form in the deformation *** the failure stage,the bonding of the interface fails rapidly and the shear stress peak point moves to the anchorage free *** anchorage structure moves integrally along the *** de-bonding stage is a research focus in the deformation and failure process of an anchorage structure,and plays an important guiding role in roadway support design and prediction of the stability of the surrounding rock.

摘要：一只僵硬太空船的态度的全球适应集合稳定问题在这份报纸被处理。二个不同盒子被考虑。由使用适应 backstepping 方法，首先，作者与未知惯性矩阵为态度控制系统设计一条全球适应控制法律以便态度和尖速度能 asymptotically 全球性被稳定到一由二 equilibria 组成设置。然后，基于获得的 backstepping 适应法律，作者考虑尖速度不是可测量的盒子。由介绍一个辅助状态，没有尖速度大小的一条半全球的适应集合稳定法律也被设计。为二个盒子，两个都，关上的循环，系统满足集合稳定性，这严厉地被证明。建议方法的有效性被模拟结果验证。

摘要：The deformation and failure mechanical mechanism in soft rock roadway is related to the stability of supported tunnels, which is important to coal mine production and construction. By physical mechanics experiments and X-ray diffraction (XRD) tests, the engineering mechanical properties of soft rock, as well as main mineral composition of the surrounding soft rock of Qigou Coal Mine, were obtained. Based on analysis results, a method using bolt-beam-net combination to support was put forward. Mechanical analysis of the support form was done by using the calculation software FLAC3D. Results show that clay minerals of this mine are kaolinite and illite mixed layer, of which the water absorption is relatively obvious and presented mudding characteristic after absorbing water, with the plasticity index of 0.35, with small expansibility, which is weakly consolidated colloid with strong connected force in unit cell. The rock blocks have the characteristics of moisture absorption softening, and the deformation mechanical mechanism of which is with the coexistence of molecular expansive mechanism, colloid expansive mechanism, and weak layer trend type. The calculation results show that the bolt-beam-net support structure makes the bolt, beam, and roof deform compatibly. The beams make the force in the bolt relatively homogeneous, which restricts the displacement of the tunnel roof as well. Finally, using in situ monitoring, the numerical results were verified.

摘要：在桩承式加筋路堤中,土拱效应影响着桩与地基土之间的荷载分担。土工加筋对减少桩土差异沉降作用显著,故路堤中剪应力未能达到临界水平,此时桩承路堤中发生的是部分发展的渐进土拱效应,而大部分现有研究方法由于采用了极限土拱效应原理进行路堤荷载分担计算而无法适用。因此,本文提出了一种基于剪应力发展型土拱效应的桩承加筋路堤荷载效应评价模型并对其合理性进行了验证,系统分析了路堤高度与内摩擦角、地基土厚度、桩帽宽与净距比、土工加筋抗拉刚度等设计参数对拱跨比、桩土应力比、土拱度、加筋拉应力和拉应变的影响敏感性。结果表明,桩帽宽与净距比为1:1.0且抗拉刚度为2000 kN/m的单层单向加筋是桩承式加筋路堤的设计敏感阈值。

摘要：社交媒体已成为提高公司价值的重要渠道。本研究以中国为背景,旨在调查社交媒体(微博和短视频平台)运营对公司价值的影响;研究采用多阶段倾向评分匹配(PSM)和分化差异(DID)设计方法。研究结果表明公司采用抖音短视频平台进行社交媒体运营对公司价值具有显著的积极影响;而公司采用新浪微博进行社交媒体运营对公司价值没有显著影响。这意味着公司运营新兴的社交媒体平台对公司价值具有积极意义,为公司开展社交媒体运营提供了指导。

摘要：Background Chronic kidney disease （CKD） is a common disorder associated with multiple adverse clinical consequences,especially cardiovascular risk and end-stage renal disease.A recent national survey demonstrated that CKD has become a leading health problem in *** is an urgent need to implement an in-depth investigation of the CKD burden and also to explore underlying mechanisms of CKD progression and it association with adverse *** The Chinese Cohort Study of Chronic Kidney Disease （C-STRIDE） is the first national CKD cohort in *** will enroll approximately 3 000 pre-dialysis CKD patients aged between 18 and 74 years and follow-up for at least 5 ***,anthropometric measures,laboratory tests,and biomaterials will be collected at baseline and *** principal clinical outcomes of the C-STRIDE consist of renal disease events,cardiovascular events,and *** on the longitudinal clinical data and biomaterials,the risk factors with CKD progression and other outcomes will be analyzed,and candidate markers and predicted models will be *** The C-STRIDE would provide important evidence for underlying mechanisms of CKD progression,valuable information for clinical guidelines,and healthcare policies in china.

摘要：Three acceptor-donor-acceptor （A-D-A） small molecules DCAODTBDT, DRDTBDT and DTBDTBDT using dithieno[2,3-d：2＇,3＇-d＇]benzo[1,2-b：4,5-b＇]dithiophene as the central building block, octyl cyanoacetate, 3-octylrhodanine and thiobarbituric acid as the end groups were designed and synthesized as donor materials in solution-processed photovoltaic cells （OPVs）. The impacts of these different electron withdrawing end groups on the photophysical properties, energy levels, charge carrier mobility, morphologies of blend films, and their photovoltaic properties have been systematically investigated. OPVs device based on DRDTBDT gave the best power conversion efficiency （PCE） of 8.34%, which was significantly higher than that based on DCAODTBDT （4.83%） or DTBDTBDT （3.39%）. These results indicate that rather dedicated and balanced consideration of absorption, energy levels, morphology, mobility, etc. for the design of small-molecule-based OPVs （SM-OPVs） and systematic investigations are highly needed to achieve high performance for SM-OPVs.

摘要：文章提出了一种由屈曲圆板和线性弹簧组成的隔振器,采用解析法和有限元法分别计算分析其屈曲模态,结果表明解析法与有限元法计算结果相吻合,验证了解析法的正确性。此外,通过采用有限元ANSYS软件计算分析其高静低动的刚度特性,验证了隔振器结构设计的合理性。最后,建立了高静低动隔振器的非线性动力学模型,进一步采用谐波平衡法分析其幅频特性,讨论了系统设计参数的影响规律。分析结果表明刚度比与隔振器的类型和非线性程度相关;此外,高静低动隔振器显示出具有典型的Duffing振子的频率跳跃现象。