数字签名实施方案的探讨

文章经过对基于对称密钥的数字签名和非对称密钥的数字签名的研究，提出了一种新的数字签名实施方案，它能很好地解决上面两种方法中存在的弊端。     

"辽鞍海城市发展轴"视阈中的千山旅游发展战略研究

以传统老工业转型为引擎,资源型城市鞍山市的城市空间也向南北纵深发展,拉动北边的辽阳、南部的海城,构成辽阳鞍山海城城市发展轴线。千山旅游区应当把握新的历史机遇,主动融入到辽鞍海城市发展大势上来。本文从产业联动升级角度,以千山旅游区如何利用鞍山城市转型契机实现跨越式发展为例,一般性地探讨了在资源型城市产业转型过程中,近郊旅游区提升产业层级的发展战略.     

Parents' Communication Skills and Adolescents' Salivary α-Amylase and Cortisol Response Patterns

The primary goal of this study was to examine patterns or groupings of adolescents’ hypothalamic-pituitary-adrenal axis (HPA) (measured through cortisol) and sympathetic nervous system (SNS) (measured through salivary alpha amylase or sAA) responses as a function of their parents’ communication skills. A related goal was to decipher whether adolescents who demonstrate different patterns of physiological reactivity vary in their personal and relational health. The sample consisted of 118 parent–adolescent dyads who were asked to talk about something stressful related to the parents’ relationship. The results revealed that adolescents’ perceptions of their parent's communication skills predicted the likelihood that the adolescents would overreact, show no reaction, or down regulate in response to such a discussion, but only for sAA. All of the communication skills in question—social support, communication competence, feeling caught between the parents’ conflict, and inappropriate disclosures—supported the hypothesis that adolescents with parents who they think are more communicatively skilled are better able to recover from a stressful interaction than adolescents whose parents are less skilled. Adolescents who were considered “overreactors” in sAA also had more negative health indices, somewhat lower psychological well-being, and poorer quality relationships with their parents.     

广义对称矩阵的特征根

本文得到了一个新的广义对称矩阵的充分必要条件,并且给出了广义对称矩阵的每个特征根的估计.     

苋轴器官异常结构的组织分化

异常加厚是苋轴器官显著的解剖学特征.根的中央维管柱外侧产生4～5轮异常形成层,以双向活动方式形成多轮同心环状排列的异常维管束和其间的结合组织.苗端原形成层束分化为中央维管束,但无束间形成层.茎中异常形成层起源于原形成层外侧的细胞,由此产生多轮散生的异常维管束.     

二次型与实对称矩阵的正定性

文章用类比的方法 ,强调矩阵理论在二次型理论中的应用 ,并且重点对实对称矩阵的正定性性质进行了讨论     

“轴心国”阴影下的二战民族问题

二战的缘起,其实还存有民族问题的潜因.德、意、日法西斯"轴心国"集团战前和战时在对被侵略国民众实行种族灭绝政策的同时,一再利用有关国家内部的民族问题兴风作浪,煽动民族敌对.这是歪曲、滥用民族自决原则,为其战略目标服务的历史例证,值得后人永远记取.     

湖北宜都方言中的“得得V”

湖北宜都方言中有一种比较常见的表可能的句式"得得V"。对"得得V"的研究不仅涉及"得得"和"V"本身而且还从"得得V"的对称否定式展开多角度阐述分析。     

旗传递（v，k，3）-对称设计的自同构群。与它们的抛物子群

文章研究了（v,k,3）-对称设计D的分类;证明了如果群G是D的几乎单型的自同构群,即存在非交换单群X使得X≤G≤Aut（D）,那么X∩Ga不可能是X的抛物子群．     

局部对称共形平坦黎曼流形的伪脐点子流形

本文研究局部对称共形平坦黎曼流形的具有平行非零中曲率向量的焦脐点子流形的截面曲率和数量曲率的拼挤问题。