个性化公开密钥系统的设计

论文提出利用用户提供的个性化信息来随机产生关联大素数,保证了素数选取的随机化、个性化,提高了RSA算法的安全性。     

Achievement of specificational information usage with true and false feedback in learning a visual relative-mass discrimination task.

Participants' usage of informational variables in learning visual relative-mass discrimination in collisions was tracked by means of PROBIT correlations. Four groups received feedback that was true or accorded with either of three nonspecificational cue variables. A majority in each group adopted the feedback, but several participants defied the false feedback. Unlike in previous research, the fit to data of the relative-mass invariant could not be bettered by post hoc linear combinations of the cues. Discriminability was lower in the use of the invariant. Analytic complexity was rejected as an explanation for discriminability differences. A "smart mechanism" for pickup of the relative-mass invariant was developed as an extension of G. Johansson's (1950/1994) vector model. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

IPA模型对Hopfield模型神经网络的改进

考虑Ｈｏｐｆｉｅｌｄ模型中假态之间的布尔逻辑关系，提出利用ＩＰＡ模型对神经网络中的假态进行抑制，并和原网络的性能进行了比较，结果表明：改进后的网络性能比Ｈｏｐｆｉｅｌｄ模型和ＩＰＡ模型均有较大提高。     

The benefits and costs of repeated memory tests for young and older adults.

Repeated and prolonged searches of memory can lead to an increase in how much is recalled, but they can also lead to memory errors. These 3 experiments addressed the costs and benefits of repeated and prolonged memory tests for both young and older adults. Participants saw and imagined pictures of objects, some of which were physically or conceptually similar, and then took a series of repeated or prolonged recall tests. Both young and older adults recalled more on later tests than on earlier ones, though the increase was less marked for older adults. In addition, despite recalling less than did young adults, older adults made more similarity-based source misattributions (i.e., claiming an imagined item was seen if it was physically or conceptually similar to a seen item). Similar patterns of fewer benefits and more costs for older adults were seen on both free and forced recall tests and on timed and self-paced tests. Findings are interpreted in terms of age-related differences in binding processes. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

近距离下覆4#煤层综采工作面顶板管理经验

介绍了近距离深层综采工作面顶板和巷道顶板管理经验，及综采工作面在通过巷道冒项区域时所采取的办法和措施。     

一种基于网络安全风险评估的入侵检测方法

针对传统的入侵检测系统存在报警数量大、误报率高等缺陷,提出了一种基于网络安全风险评估的入侵检测方法,该方法基于入侵检测结果,引入抗体浓度随入侵强度动态变化这一人工免疫理论的最新研究成果进行网络安全风险的计算,然后根据当前网络面临的实时安全风险动态设置报警策略。实验结果表明,该方法能够实时、定量地计算主机和网络所面临的风险,并极大地降低报警数量和误报率。     

基于卡尔曼滤波的电力虚假数据注入攻击检测方法

能源互联网的主体是基于状态估计下的电力系统。虚假数据注入攻击（FDIA）通过恶意篡改或注入电力数据,进而引发错误的状态估计结果。这种攻击方式存在引发大面积停电事故的风险,严重影响能源互联网的正常运行。在matpower 4.0中的IEEE-14节点系统上,利用以残差方程为基础的标准残差检测法和目标函数极值法,对FDIA进行了检测实验。提出了一种基于卡尔曼滤波的FDIA检测方法,并在MATLAB上进行了验证。实验结果表明,该方法可以在短时间内发现FDIA的发生。     

基于图像信息的彩色PDP动态子场编码优化方法

为改善累积发光驱动方法显示静态图像时的灰度级轮廓,提出了一种基于有效灰度级均匀分割采样的动态子场编码(DSC)算法。首先对输入图像中的孤立灰度区间进行灰度采样,然后对剩余灰度级均匀分割,选择各灰度区间概率密度较大的灰度级作为采样灰度级,相邻采样灰度级之差即为子场编码权值,从而使采样灰度级均匀分布在输入图像的有效灰度区间,并使采样灰度级和子场编码权值随图像变化。仿真和实验结果表明,该算法不仅能真实再现大面积的背景,而且使图像细节信息尽可能保留,显著减小了静态图像的轮廓。     

有限体积法求解立体角离散误差

为解决采用有限体积法求解辐射传输方程时引起离散误差的问题,从有限体积法立体角内热流密度的求解过程出发,运用泰勒级数推导了近似误差的表达式,并分析影响离散误差的各种因素,包括离散射线数,辐射强度分布,假散射及网格比.根据分析结果,采用辐射强度的连续分布模型,模拟了各种因素对误差的影响.结果表明,辐射强度的分布函数对于有限体积法的离散误差有一定程度影响.当增加网格数及减小网格尺寸比时,可以有效地减小离散误差.假散射与离散误差间呈较强的非线性耦合关系.     

不同破口大小对B型主动脉夹层假腔内压力的影响

为了研究夹层内的血流动力学变化对夹层转归的重要影响,并期望为临床判断主动脉夹层发展及转归提供理论依据,通过3D打印技术制作不同出入口比例及破口大小的B型主动脉夹层模型,对主动脉夹层内血流变化进行模拟,并测量观察主动脉夹层模型假腔内压力变化及流场情况.真腔内固定压力为18.620、21.280 k Pa两组中,不同破口比例的假腔入口压力比普遍均小于夹层模型内其他假腔位置,且压力值低于真腔压力;真腔内压力为23.940 k Pa组中,破口比例为2∶1的夹层模型内假腔压力比较其他破口比例模型的压力比明显升高;所有模型真腔固定水压为21.280、23.940 k Pa下均可观测到同真腔压力下,真腔流速更快,其内部压力低于假腔.同一模型中,假腔压力普遍低于真腔压力;相同压力下,原发破口大的模型假腔流速相对较低,而涡流明显;相同模型相同压力下,假腔流速低于真腔,假腔的涡流更为明显,复杂的涡流和旋动对壁面造成冲击进而使假腔破裂风险增加.