高校“双高”人员思想状况调查与入党工作研究——以新余学院为例

高校经过多年的实践和探索,发展“双高”党员工作力度不断加大,取得可喜成绩,但也存在一些新的问题。以新余学院为例,通过在“双高”非党人员中发放问卷调查,召开部门座谈会、代表座谈会等形式,了解学校“双高”人员的思想状况,对目前高校“双高”人员未主动加入党组织的原因进行认真分析,在此基础上建立高校“双高”人员入党工作新机制。     

基于时钟信号的异步时序逻辑电路设计

与其他异步时序逻辑电路设计方法相比,基于时钟信号的设计法更简便、快捷。使用该方法时,不用画出时序图,直接从次态卡诺图中选定正确的时钟信号,再快速求出触发器状态方程。     

不同应力应变状态下弹性软体的摩擦特性

为了揭示弹性软体在动态作用力下的摩擦特性,分别以45钢模具和45钢小球、硅橡胶模具和有机玻璃(PMMA)小球、聚四氟乙烯模具和聚四氟乙烯小球为对偶件,对弹性软体(兔小肠)不同应力应变状态下的摩擦特性进行研究.以45钢模具和45钢小球为对偶件的摩擦试验表明:小肠平均摩擦系数随径向应变呈类周期性变化,表现为随着径向应变的增加而变大.以柔性材料硅橡胶模具和PMMA小球为对偶件的摩擦试验表明:径向应变情况下,随着法向载荷的增加,平均摩擦系数呈增加趋势.以聚四氟乙烯模具和聚四氟乙烯小球为对偶件的摩擦试验表明:轴向应变情况下,随着法向载荷的增加,平均摩擦系数呈减小趋势.     

拓扑绝缘体表面电子在非均匀磁场下的束缚态与能谱

计算了拓扑绝缘体表面上狄拉克电子在磁势约束下的能谱,分别就圆形和环形约束量子点给出了通过磁势垒约束狄拉克电子形成束缚态的条件.量子点半径趋于零时,狄拉克电子占据朗道能级,半径增大时出现(n,m)态和(n,-m)态的简并.环形量子点中内外半径之比小于某个临界值时,才会出现束缚态,反之,退化到朗道能级.这些束缚能级可以通过改变约束半径或磁场大小来调制,对设计拓扑保护的量子器件有重要应用.     

“天下当朝正许昌”——兼论许昌历史发展特点与地位

许昌,古许国所在地,秦汉魏晋南北朝时期为许县,隶属颍川郡,隋唐至明清称许州,今为省辖许昌市,其行政管辖范围大致和许州时代相同。许昌地理环境优越,良田沃野,山川秀美,是古代农业社会经济最发达的地区之一。处于九朝古都洛阳和七朝古都开封之间,很长时期内,地接京畿,政治上、军事上占有举足轻重的地位。汉末魏晋时期,“天下当朝正许昌”,是曹魏和西晋王朝的政治与军事要地。隋唐北宋时期,地处汴、洛之间,锁钥中原,各种文化交汇于此,使得许昌往往能开风气之先,名人辈出。纵观数千年的许昌发展史,既遭受过不堪回首的灾难,又取得过值得自豪的辉煌成就。可以说,元、明以前的许昌,实乃历代王朝政治之枢纽,文化之熔炉,人文之渊薮。     

基于攻击模拟的网络安全风险分析方法研究

提出了一种基于攻击模拟的网络安全风险分析方法.在提取目标系统及其弱点信息和攻击行为特征的基础上,模拟攻击者的入侵状态改变过程,生成攻击状态图,并给出其生成算法.利用攻击状态图识别出了潜在的威胁及其所涉及的主体、客体和行为,经过定量评估得到各种入侵路径的风险程度,为分析风险状况和制定风险控制策略提供了依据.通过典型实验环境,验证了该模型的实用性及有效性.     

Excited-state dynamics in light-harvesting complex of Rhodobacter sphaeroides

Photodynamics of peripheral antenna complexes, light-harvesting complex （LH2） of Rhodobacter （Rb） Sphaeroides 601, was studied using femtosecond pump-probe technique at different laser wavelengths. The obtained results reveal dramatic dynamical evolutions within B800 and B850 absorption bands of antenna complexes LH2. At excitation wavelength around 835 nm, a sharp photobleaching signal was observed which was assigned to the contribution of the two-exciton state, which was further confirmed by the power dependence measurement. Rate equations with eight-level scheme were used to calculate the population evolution in LH2 and the transient dynamics under femtosecond pulse excitation. The research results prove that not only the transition from ground state to one-exciton state but also that from one-exciton state to two-exciton state contribute to the photodynamics of B850.     

ApcD is required for state transition but not involved in blue-light induced quenching in the cyanobacterium Anabaena sp.PCC7120

Pbycobilisomes(PBS) are able to transfer absorbed energy to photosystem I and Ⅱ,and the distribution of light energy between two photosystems is regulated by state transitions.In this study we show that energy transfer from PBS to photosystem I(PSI) requires ApcD.Cells were unable to perform state transitions in the absence of ApcD.The apcD mutant grows more slowly in light mainly absorbed by PBS,indicating that ApcD-dependent energy transfer to PSI is required for optimal growth under this condition.The apcD mutant showed normal blue-light induced quenching,suggesting that ApcD is not required for this process and state transitions are independent of blue-light induced quenching.Under nitrogen fixing condition,the growth rates of the wild type and the mutant were the same,indicating that energy transfer from PBS to PSI in heterocysts was not required for nitrogen fixation.     

热激发态下介观压电石英晶体的量子涨落

利用阻尼谐振子量子化方法,将介观压电石英晶体等效电路量子化,根据热场动力学(TFD)理论,研究了介观压电石英晶体在热激发态下电流和电压的量子涨落.结果表明介观压电石英晶体中存在电流电压的量子涨落,量子涨落不仅和石英晶体等效电路的固有参数有关,而且还和激发量子数、压缩态的压缩度、压缩角及环境温度有关,且随温度的升高而增大,随时间按指数规律而衰减.     

一类带势的非线性Schrdinger方程对称爆破解的L~2集中性质

研究一类带势的非线性Schrdinger方程iut=-△u-k(t,x)|u|4/Nu,在二维空间中得到了其解在有限时间爆破的充分条件和其对称爆破解的L2集中性质.