一类具有分布时滞高阶微分方程的周期解

利用Mawhin重合度理论,研究了一类具有分布时滞的高阶P—Laplacian中立型微分方程,获得了其周期解存在性的一些新结果．     

湖南维新派"师日观"初探

甲午战争失败后,湖南维新派欲变法自强,其日本观完全转变,师日成为普遍共识.他们主张,主要从两个方面向日本学习:一、学习日本维新志士的献身精神;二、主张在政治、经济、教育、社会等方面向日本学习.这股在湖南掀起的师日风潮,给湖南维新运动带来积极的推动作用.同时,也对后来的湖南历史发展产生了一定的影响.     

严万里《商君书校》校勘特色平议

<商君书校>一书,以其校勘的精审、方法的缜密见长.著者淹博通贯,小学根底扎实,且熟谙于朴学家校治古书之法,因而在校勘的实践中应付裕如,左右逢源.在校勘上搜罗宏富,征引广博,在指出诸本文字差异的同时,抉择按断,兼下己意.不盲从古本或善本,敢于大胆发疑,刊改漏失,补苴未备,提出了若干具有创造性的新见解.校勘文字,大胆审慎,...     

2-氯甲基-5-芳基-1，3，4-噁二唑的合成及光谱分析

合成6个2一氯甲基-5-芳基-1,3,4-噁二唑,化合物的结构经。HNMR、FT—IR、MS表征．光谱分析表明：在260—279nm出现最大紫外一可见吸收峰;在DMF溶液中,334—362nm出现最大荧光发射峰,是一类紫色发光材料．     

Dependence of electrical and optical properties of IGZO films on oxygen flow

Amorphous InGaZnO (a-IGZO) films were deposited on the corning eagle XG (EXG) glass substrates using magnetron sputtering method. The structure, surface morphology, electrical and optical properties of these films were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), semiconductor parameter analyzer and spectrophotometry, respectively. The influence of oxygen flow on the electrical properties of IGZO thin films was studied, showing that increasing oxygen flow changes the resistivity with six orders of magnitude. The contact resistance of ITO/IGZO is 7.35×10⁻² Ω·cm², which suggests that a good ohmic contact exists between In₂O₃: Sn (ITO) and IGZO film.     

Extraction of novel features for emotion recognition

Hilbert-Huang transform method has been widely utilized from its inception because of the superiority in varieties of areas. The Hilbert spectrum thus obtained is able to reflect the distribution of the signal energy in a number of scales accurately. In this paper, a novel feature called ECC is proposed via feature extraction of the Hilbert energy spectrum which describes the distribution of the instantaneous energy. The experimental results conspicuously demonstrate that ECC outperforms the traditional short-term average energy. Combination of the ECC with mel frequency cepstral coefficients (MFCC) delineates the distribution of energy in the time domain and frequency domain, and the features of this group achieve a better recognition effect compared with the feature combination of the short-term average energy, pitch and MFCC. Afterwards, further improvements of ECC are developed. TECC is gained by combining ECC with the teager energy operator, and EFCC is obtained by introducing the instantaneous frequency to the energy. In the experiments, seven status of emotion are selected to be recognized and the highest recognition rate 83.57% is achieved within the classification accuracy of boredom reaching 100%. The numerical results indicate that the proposed features ECC, TECC and EFCC can improve the performance of speech emotion recognition substantially.     

Characteristics of bottom gate a-Si TFT array for AM-OLEDs

The authors have fabricated bottom gate amorphous silicon thin film transistor (a-Si TFT) array using five-step lithography process.The device shows a field effect mobility of 0.43 cm 2 /(V·s),on/off ratio of 7.5×10 6 and threshold voltage of 0.87 V.The instability of a-Si TFT is ascribed to the defect state in the a-Si channel and SiNx/a-Si interface.The present a-Si TFT array with SiN x insulator could be a significant step towards the commercialization of active matrix organic lighting diode (AM-OLED) te...     

Rotenone induces more serious learning and memory impairment than α-synuclein A30P does in Drosophila

Parkinson’s disease (PD) is a heterogenous disease caused by multifactorial etiology. PD is characterized by the loss of dopaminergic (DA) neurons in the substantia nigra and the accumulation of Lewy bodies. In this study, two Drosophila PD models by exposing Drosophila to rotenone (sporadic PD models) are proposed, and the human α-synuclein A30P protein (family PD models) in Drosophila is expressed respectively. Both models recapitulated the main human PD symptoms including the loss of dopaminergic neurons...     

近代中国社会变迁与中国共产党的创建——对中国共产党创建历史缘由的社会解读

中国共产党的创建是近代中国社会演变的必然产物。从社会史的视角来看,中国共产党的创建有近代中国社会变迁的内在主因。具体说,近代中国的留学运动及国内新式教育的兴起为中共的创建准备了领袖群体,近代中外文化交流特别是马克思主义在中国的传播为中共的创建提供了指导思想,新文化运动的思想启蒙与五四运动的政治实践为中共的创建准备了干部条件,中国工人阶级在民族资本主义发展中成长起来奠定了中共创建的阶级基础,近代中国民族危亡的形势及政治现代化进程形成了中共创建的政治条件。换言之,近代中国社会变迁的诸多层面,为中共的创建提供了"领袖群体"、"指导思想"、"干部条件"、"阶级基础"、"政治条件"等前提。     

再议辛亥革命的成败

辛亥革命的动力是由革命党、立宪派、统治集团内部改革派等多种力量组成的反清阵营,立宪派压抑党人,袁世凯迫孙让位应视为阵营内部的斗争,不能作为失败的依据。立宪派"保路"引发武昌起义,策动"独立"促进清朝统治的瓦解,袁氏集团拥护"共和"迫使清廷退位,革命阵营扩大恰与胜利同行。辛亥革命的目标可以理解为"主体预设"和"后人规定"等多层任务,要求彻底完成后人规定的反帝反封建任务,违背了历史主义原则,据此不足以证明其失败。辛亥革命基本完成了主体预设的三民主义,也参与了反帝反封建的任务,表明了胜利。辛亥革命付出代价决定于专制的顽固与满汉之间的对峙,革命后的割据根源在于封建经济与列强干预,代价与混战也不能证明失败。革命促进了政治体制、经济基础与文化意识的进步,受益大于成本,再次印证胜利。