摘要：π-Conjugated polymers(CPs)represent one of the quite important and rapidly growing branches of flexible electrochromic *** hybrid CPs employing dibenzo pentacycles(fluorenes,carbazoles,dibenzothiophenes,and dibenzofuran)as the backbones have received considerable attention owing to their special structures and interesting electrochromic *** studies show that polymers from these structures exhibit decent contrast ratios,favorable coloration efficiencies,low switching voltages,fast response time,excellent stability,and color ***,their electrochromic properties significantly depend on fine-tailoring of precursor monomer structures,and polymerization techniques and *** review devotes to showing a clear picture of the research progress of dibenzo pentacycle-centered CPs via electrochemical polymerization,including fluorenes,carbazoles,dibenzothiophenes,and dibenzofuran-based hybrid electrochromic *** influences of the tailored precursor structures on their electropolymerization and resultant polymer performances are highlighted,aiming at providing an insight for the development of novel fused ring-based polymer electrochromic materials.

摘要：Microwave assisted-semi bionic extraction (MASBE) process for lignans from Fructus Forsythiae was studied. The influences of solvent pH value, microwave power, dosage of solvent and irradiation time were investigated. Optimum extracting parameters were determined by orthogonal experiments as follows: pH value of solvent at first extraction is 5.5-6.0, that at the second extraction is 7-8; microwave power is 700 W; mass ratio of Fructus Forsythiae to water is 1-12; irradiation time is 10 min, and extracting times is two. Under these optimal conditions, the yield of lignans reaches 0.364%. Compared with the conventional extraction methods, the MASBE process has the advantages of high extraction rate, high extraction selectivity.

摘要：电解水是绿氢制备最有希望的路线之一,它的颈瓶是阳极析氧反应需要极高的过电位,导致电解水制氢整体能耗高.因此,迫切需要开发廉价、高活性、大电流稳定的非贵金属基多功能催化剂以期降低电解水的制氢能耗,如淡水或含尿素的水.鉴于此,我们合理设计并合成了绣球状的CoP/Ni3FeN异质结,用于碱性析氢、析氧和尿素电催化氧化反应.该催化剂呈现出优异的三功能催化活性和出色的大电流耐久性,在进行析氢、析氧和尿素电氧化反应时,分别需要-0.160、1.538和1.419 V的超低电位就能达到1000 mA cm^(-2)的高电流密度.此外,将该电催化剂作为正极和负极耦合全解水/尿素器件,仅需要1.577/1.668 V的电压就能驱动500 mA cm^(-2).此外,结合原位拉曼光谱、测试后的X射线光电子能谱分析与密度泛函理论计算,我们验证了CoP/Ni3FeN异质结催化剂可以极大地促进析氧和尿素氧化反应中的活性物种金属羟基氧化物的形成,同时降低析氢反应中的水吸附和活性氢中间体的吸附能垒,从而协同促进高效的析氢、析氧和尿素电催化氧化性能.这项工作为开发多功能电催化剂用于低电压电化学制氢提供了一条有效途径.

摘要：尽管高能量水系锌离子超级电容器(ZHSCs)的研究取得了重要的进展,但缓慢的锌离子扩散及不理想的阴极材料仍然限制了其能量密度和循环寿命.在本文中,我们设计了具有合适的孔径分布及优异的锌离子储存能力的氮掺杂分级碳球(NMCSs).组装的ZHSCs在0.2 A g^(-1)的电流密度下,表现出优异的电容量(157.8 mA h g^(-1))及能量密度(126.2 W h kg^(-1)),具有卓越的功率密度(39.9 kW kg^(-1)).此外,ZHSCs表现出了超长的循环稳定性,在50,000次循环测试后仍能保持96.2%的初始电容量.此外,我们设计了一种新型的平面ZHSCs,表现出优异的低温电化学性能,超高的体积能量密度(31.6 mW h cm^(-3))和极佳的集成性能.通过原位/非原位表征,系统地揭示了NMCSs电极优异的电化学性能主要来源于阳离子和阴离子的协同吸附以及NMCSs的可逆化学吸附作用机理.本工作不仅为新型高性能ZHSCs的构建和开发提供了新思路,也为进一步理解ZHSCs的电化学储能机理提供了依据.

摘要：The overuse of and heavy dependency on a technology will result in the rigidity of thinking, which is true of computer-aided drawing. Due to the similarities in computer graphics, freehand sketching has attracted the public attention again. In this paper, the necessity and importance of freehand sketching were reaffirmed, and suggestions for teaching reform in terms of learning interest, methods, quantity, and achievements were put forward, so as to help students to comprehensively improve their skills and accomplishment in their learning and practice.

摘要：In this paper a new theory referred to as the decrease-radix design （DRD） is proposed, which is found in the research of logic units of ternary （tri-valued） optical computer. Based on the theory proposed, the principles and the regulations of the DRD for making operation units of multi-valued operation with carrying/borrowing free are also presented. The research work has come to the following important conclusion： let D be a special state contained in n physical informative states, then one may figure out any multi-valued processors within n^（n×n） carrying/borrowing free n-valued units by the composition some of n×n×（n-1） simplest basic operating units according to the regulations of DRD proposed in this paper. The detailed systematic way of our design regulations is highlighted step by step in the paper with an example of design of a tri-valued logic optical operating unit. The real architecture, the procedure, and the experimental results of our sample in tri-valued logic operating unit are given. Finally, a re-constructible model of ternary logical optical processor is introduced. The theory proposed in the paper has laid down a solid foundation for the design of re-constructible carrying/borrowing free operating units in ternary optical computers and can be widely used as the designing reference in a variety of multi-valued logic operating units.

摘要：Katherine Anne Porter is a prominent figure in American literary history,particularly excelling in the realm of short stories as a novelist and *** paper studies her short stories,combined with her growth and life experience,from the revolutionary independence of youth to middle-aged female consciousness to the old age of home-sick and miss to relatives,Katherine Anne Porter reveals a sense of loneliness and *** exquisite writing style,agile language,psychological character portrait,gives a picture of the specific history and social changes under her thoughts and life insight.

摘要：In a novel,space is an essential element,because the characters need a special place to tell their *** recent years,more and more scholars indulge their interest in studying spatial narrative.“The Story of an Hour”is one of Kate Chopin’s representative works,which describes one-hour mental journey of *** after hearing the death of her *** essay will interpret it from the perspective of spatial narrative and try to find its ingenious methods to narrate the story.