论《赵氏孤儿》的悲剧快感

《赵氏孤儿》是著名的古典悲剧,给人带来悲的世界,但这种悲不是绝望的悲,是一种给人奋发向上的悲。悲剧中既有痛感的体现,也有一种快感在其中。讨论《赵氏孤儿》戏剧的悲剧快感,主要从韩厥两难处境、屠岸贾的过场作用对《赵氏孤儿》加以审美的分析和提炼,从艺术自身的角度看待《赵氏孤儿》方能体会到它长久不衰的魅力。     

西藏农村人力资本投资困境分析

农村人口综合素质整体不高,日益成为西藏农村反贫困和可持续发展的重要制约因素之一,加大人力资本投资日益迫切.文章提出没有基于本地化的农村办学思路,师资队伍整体落后与教育质量不高长期并存,教育投资观念偏差根深蒂固,基层卫生服务能力薄弱及健康知识普及严重不足等是当前西藏农村人力资本投资存在的诸多困境,并指出尽快优化教育发展结构、突出师资队伍建设、加强成人培训力度、关注妇女儿童健康是提高农村人口发展能力的重要途径.     

Spin-polarized current and tunnel magnetoresistance in heterogeneous single-barrier magnetic tunnel junctions

Current in heterogeneous tunnel junctions is studied in the framework of the parabolic conduction-band model. The developed model of the electron tunneling takes explicitly into account the difference of effective masses between ferromagnetic and insulating layers and between conduction subbands. Calculations for Fe/MgO/Fe-like structures have shown the essential impact of effective mass differences in regions (constituents) of the structure on the tunnel magnetoresistance of the junction.     

Nationalism Reflected in Barometer Rising

Hugh MacLennan is a famous Canadian novelist and essayist. In his long literary career, he wrote a great number of works and gained many literary honors. But above all, he is a writer, focusing on national issues of Canada, which is well demonstrated by his first novel-Barometer Rising, in which nationalism abounds. This paper covers three parts. Chapter one is mainly about Hugh MacLennan, his first work Barometer RAsing as well as the introduction to nationalism and MacLennan＇s contribution in fiction in this respect. Chapter two focuses on nationalism in his first novel. The last chapter is the conclusion part in which we know that well awakened, the Canadians are striving to pursue their real independence and stares on the international stage.     

Current Efficiency,Corrosion and Structural Changes in SnO2-Sb2O3-CuO Inert Anodes for Aluminium Electrolysis

A systematic study was conducted on current efficiency （CE）, corrosion and structural changes in SnO2-based inert anodes （made of 96wt%SnO2＋2wt%Sb2O3＋2wt%CuO） on a laboratory Hall-Heroult aluminium cell. The influence of operating parameters and electrolyte composition on the CE and corrosion process were evaluated. The CE was found to be more than 90% and catastrophic corrosion took place at low percent of Al2O3, high percent of LiF, low cryolite ratio and high current densities. From all the structural changes that took place in the SnO2-based inert anodes, we assumed that the most important contribution was due to the migration of CuO towards the outer limits of the constituent grains of SnO2 based ceramic. The complex process occurred during the formation of various phases and their sintering ability both directly depended on Cu/Sb molar ratio.     

金属性二维过渡金属硫化物的溶剂热合成及电催化析氢性能

采用溶剂热法制备了多种二维过渡金属硫化物(TMDCs), 在合成过程中通过调控反应前驱体的滴加速率来控制所得TMDCs的形貌和结构. 然后采用高温热处理来提高TMDCs的结晶性, 从而提升了其电催化活性. 在酸性电解液中进行电催化析氢性能测试. 结果表明, “花状”结构的金属性二维二硫化铌(NbS₂)具有最佳的催化活性和稳定性, 在电流密度为10 mA/cm²时, 其过电位仅为146 mV, 持续工作24 h后电流密度几乎不衰减. 研究发现, 可充分暴露面内活性位点的“花状”结构以及高温处理后材料导电性的提高是二维NbS₂具有优异电催化性能的主要因素.     

Effect of relative humidity on current–voltage characteristics of monopolar DC wire-to-plane system

This paper deals with the DC monopolar corona discharge in wire-to-plane geometry under variable humid air conditions. The classical formulas of Townsend commonly used for the current–voltage characteristics were used to determine the various corona parameters for the both polarities of the corona discharge. A circular biased probe has been adapted to the plane and is used to measure the ground plane current density and electric field during the monopolar corona discharge. A new approach to the problem of corona discharge in transmission system has been described in this paper. The effect of varying the humidity and wires diameter is also investigated. The values of the electric field and the current density are maximum beneath the corona wire and decrease when moving away from them and the current–voltage characteristics follow the quadratic Townsend's law. The experimental results show that the monopolar corona discharge is strongly affected by the air humidity. The current density and the electric field are measured and compared with the computed values. The agreement between the calculated values and those obtained experimentally is satisfactory. The per unit electric field and current density are also represented by a unique function.     

基于电源电流和输出电压的模拟电路故障模型研究

基于模拟电路电源电流和输出电压的协同分析,研究了复数域的故障建模方法,提出了一种2D故障模型的数学表达式,该模型为复平面上的一簇圆轨迹。为了扩大故障轨迹之间的距离,在相同测量精度和元件容差条件下提高故障检测率和隔离率,进一步提出了3D复数空间的优化故障模型。两种故障模型都极大简化了测点选择算法和模拟故障状态仿真的复杂度,理论上对模拟电路单故障的覆盖率为100%。基于滤波器电路的实验仿真结果验证了两种故障模型的有效性。     

Sea surface temperature records of core ZY2 from the central mud area in the South Yellow Sea during last 6200 years and related effect of the Yellow Sea Warm Current

Sea surface temperature (SST) records in the South Yellow Sea during the last 6200 years are reconstructed by the unsaturation index of long-chain alkenones (K 37 U ’) in sediment core ZY2 from the central mud area.The SST records varied between 14.1 and 16.5°C (15.6°C on average),with 3 phases:(1) A high SST phase at 6.2-5.9 cal ka BP;(2) A low and intensely fluctuating SST phase at 5.9-2.3 cal ka BP;and (3) A high and stable SST phase since 2.3 cal ka BP.Variation of the SST records is similar to intensity of the Kuroshio Current (KC),and corresponds well in time to global cold climate events.However,the amplitude of the SST response to cooling events was significantly different in different phases.The SST response to global cooling event was weak while the KC was strong;and the SST response was strong while the KC was weak.The difference in amplitude of the SST response is possibly caused by the modulation effect of the Yellow Sea Warm Current which acts as a shelf branch of the KC and a compensating current induced by the East Asia winter monsoon.The warm waters brought by the Yellow Sea Warm Current cushion the SST decrease induced by climate cooling,and both the Kuroshio and East Asian winter monsoon play important roles in the modulation mechanism.The SST records display a periodicity of 1482 years.The same period was found in the KC records,indicating that variation of the SST records in the central South Yellow Sea is strongly affected by KC intensity.The same period was also found in Greenland ice cores and North Atlantic and Arabian Sea sediment cores,showing a regional response of marine environmental variability in the East China Seas to that in the global oceans.