摘要：In this paper, the problem of designing semi-global finite-time observers for a class of nonlinear systems is investigated. Based on the theories of finite-time stability, an approach to designing semi-global finite-time observers for the nonlinear systems is presented. It has been shown that, after the finite time, the designed finite-time observer realizes the accurate reconstruction of the states of the nonlinear system. A numerical example is given to illustrate the effectiveness and validity of the method.

摘要：In this paper, we conduct survey and research on the innovativeness and characteristic of digital media under the environment of Internet and big data. Under the background of the era of rapid change, the current education system is more severe impact and challenge. Creative industry is the product of cultural industry development to a new stage, is the most creative cultural industry and the origin of the core part of the new economic era of creativity industry is the condition of globalization. The research indicates that the combination of the big data with digital media is necessary and needed. In the future, we will test more related combination and creativeness.

摘要：Shallow soil with low water availability is the key limiting factor for plant growth and reproduction in vulnerable karst *** herbs are pioneers adapted to these areas;however,little is known about the responses of their seeds and infructescence,and the germination of their offspring to these limited water and soil *** this study,we investigated how the seed and fruiting phenology plasticity and offspring seed germination rates of two annual Asteraceae herbs(Xanthium sibiricum and Bidens pilosa)respond to the harsh karst soil environment,by assessing the seed number,seed biomass and offspring seed germination *** and *** were grown under three soil thicknesses and three water availability levels in a full two-way randomized block *** key results were as follows:(1)The number and biomass of progenies(infructescence and seeds)of *** decreased with the decline of soil thickness and/or water availability(P<0.05).The infructescence and seed biomass of *** increased with the decline of water availability.(2)Seed quantity and seed biomass of *** showed no correlation after their parents experienced resource reductions.A significant positive relationship between seed number and seed biomass was observed in ***(P<0.05).(3)The offspring seed germination rate of *** did not change with the decrease of soil thickness under three levels of water ***,the offspring seed germination rate of *** decreased significantly with the decrease of soil thickness under the control water level(P<0.05).The results show that *** tends to improve its competitiveness by ensuring the quantity and quality of offspring in order to adapt to the shallow karst soils and dry karst *** contrast,*** adapts to the unfavorable karst habitats by a risk-sharing *** produces more and bigger seeds to in an attempt to expand its survival range and escape from the unfavorable living

摘要：Writer＇s imagination does not only provide inspiration for literary creation, but also contribute literature works with more dazzling brilliance. As a representative of the British Romantic Poetry--William Blake, whose poems are full of imagination, always concedes his emotion and thoughts in a variety of imageries, exposing the reality of his times within his poetry writing. However. William Blake＇s imagination is no castles in the air, but based on the religious mythology, historical background, and the poet＇s life experience and dream pursuit. Only with in-depth understanding of the imagination in William Blake＇s poems can those hidden emotions and thoughts be grasped and appreciated.

摘要：Ensuring that water flows smoothly into spillways is the main challenge in spillway design. In order to help avoid the formation of vortices and separation of flow along the guide wall in front of the gates during overflow through the spillway, an experiment with a physical model of the Yutang Dam. bank spillway was carried out, The profile of the guide wall was redesigned to eliminate the formation of vortices and separation of flow. This involves opening up holes in the middle part of the guide wall. The test results show that the design is effective in improving the flow conditions of the inlet, and in ensuring the desired values of water head along the guide wall and discharge capacities of the spillway,

摘要：To improve the photocatalytic oxidation reaction activity for NO removal, photocatalysts with excellent activity are required to activate molecular oxygen. Solid solution and heterojunction were suggested as effective strategies to enhance the molecular oxygen activation viaexciton and carrier photocatalysis. In this study, a solid solution and heterojunction containing BiOBr0.5I0.5/BiOI catalyst was synthesized, and it showed improved photocatalytic activity for removing NO. The photocatalytic NO removal mechanism indicated that synergistic effects between the solid solution and heterojunction induced the enhanced activity for molecular oxygen activation. The photogenerated holes, superoxide, and singlet oxygen generated by the carrier and exciton photocatalysis supported the high photocatalytic NO removal efficiency. This study provides new ideas for designing efficient Bi-O-X(X = Cl, Br, I) photocatalysts for oxidation reactions.

摘要：Generalized hypercubes （denoted by Q（d1,d2,... ,dn）） is an important network topology for parallel processing computer systems. Some methods of forming big cycle from small cycles and links have been developed. Basing on which, we has proved that in generalized hypercubes, every edge can be contained on a cycle of every length from 3 to IV（G）I inclusive and all kinds of length cycles have been constructed. The edgepanciclieity and node-pancilicity of generalized hypercubes can be applied in the topology design of computer networks to improve the network performance.

摘要：Based on job analysis for the permanent departments of construction enterprises, by combining KPI assessment method and 360-degree evaluation method, this article establishes a set of human resource performance evaluation indicator system; by determining indicators＇ weights and evaluators＇ grading weights through analytic hierarchy process （AHP）, offering a kind of dynamic computing method for performance evaluation, and tightly linking the evaluation result to employees＇ personal interests, this article builds up a set of scientific performance evaluation system. This article takes the engineering department of construction enterprises for example to explain the calculation and application of performance evaluation result. This article provides construction enterprises with a method reference for human resource performance evaluation.

摘要：Solar‐energy‐driven catalytic CO_(2) reduction for the production of value‐added carbon‐based materials and chemical raw materials has attracted great interest to alleviate the global climate change and energy *** production of multicarbon(C2)products through CO_(2) reduction is extremely attractive,however,the yield and selectivity of C2 products remain low because of the low reaction temperature required and the low photoelectron density of the ***,we introduce WO3–x,which contains oxygen vacancies and exhibits an excellent photothermal conversion efficiency,to improve the generation of C2 products(C2H4 and C2H6)under simulated sunlight(UV‐Vis‐IR)***3–x produced 5.30 and 0.93μmol·g^(–1)C2H4 and C2H6,respectively,after 4 h,with a selectivity exceeding 34%.In situ Fourier transform infrared spectra and theoretical calculations showed that the oxygen vacancies enhanced the water activation and hydrogenation of adsorbed CO for the formation of C2 products via C–C coupling from CH2/CH3 *** findings of this study could assist in the design of highly active solar‐energy‐driven catalysts to produce C–C coupling products through CO2 reduction.

摘要：Axiomatic design (AD) and theory of inventive problem solving (TRIZ) are widely used in conceptual design. Both of them have limitations, however. We presented an integrated model of these two methods to increase the efficiency and quality of the problem solving process for conceptual design. AD is used for systematically defining and structuring a problem into a hierarchy. Sometimes, the design matrix is coupled in AD which indicates the functional requirements are coupled. TRIZ separation principles can be used to separate non-independent design parameters, which provide innovative solutions at each hierarchical level. We applied the integrated model to the heating and drying equipment of bitumen reproduction device. The result verifies that the integrated model can work very well in conceptual design.