考虑脉冲现象的复杂供应链系统及其稳定策略

供应链系统是一个复杂的系统,一方面由于时间延迟、信息不对称及反馈机制等,会产生牛鞭效应,另一方面供应链具有需求突增或骤减的脉冲特点,上述现象都可能导致供应链系统混沌,而现有的供应链模型仅考虑了“牛鞭效应”,并未考虑脉冲现象对供应链系统的影响。文章建立了考虑脉冲现象的供应链模型,分析了脉冲现象对供应链系统的影响,并给出了使供应链系统稳定的策略,讨论了参数扰动对该模型的影响,通过数值算例验证了稳定策略的有效性。研究发现:脉冲现象对供应链系统有着显著影响,但只要选取恰当的脉冲强度和脉冲时间间隔,供应链系统是可以稳定的。     

弘扬传统热闹春节

春节是中国最大的节日,在诸多节日中是最特别的,它最有个性,最有内容,最值得重视.我们应该在继承传统的基础上,为新时期的春节文化增添新的光彩.首先要注重营造春节的家庭气氛;其次春节庙会游园也要更加丰富多样,组织系统得力;再次各方面应群策群力,继承和创新齐头并进.     

中国哲学共同体的“诗词作业”与“心灵审美”

<正>有些习焉不察的现象,一旦深究起来,结论往往令人吃惊。譬如,本文写作之际,原本以为我们这个共同体就自身素质问题早已积累了相当数量的研究文献,可谷歌搜寻中国哲学从业者素质,     

Relational and Overt Aggression in Childhood and Adolescence: Clarifying Mean‐level Gender Differences and Associations with Peer Acceptance

Research on relational aggression has drawn attention to how girls may be likely to aggress, but the role of gender is not fully understood. There are opposing views regarding whether relational aggression is most common among girls. Current findings demonstrate that when gender differences in relational aggression are assessed with peer nominations, gender differences favoring girls are more likely: (1) in adolescence than childhood; and (2) when statistical overlap with overt aggression is controlled. Results also indicated that associations of relational aggression with peer acceptance depend on the aggressor's gender, the peer rater's gender, and whether overlap with overt aggression is controlled. Associations of relational aggression with lower acceptance became non‐significant when overt aggression was controlled, suggesting that relational aggression displayed in isolation may not damage acceptance. In fact, in mid‐adolescence, girls’ relational aggression predicted greater liking by boys. Reducing relational aggression among adolescent girls may be especially challenging if the behavior is linked with acceptance by boys.     

19世纪末20世纪初中国商人阶层的崛起

在漫长的中国封建社会中,商业被贬之日末务,商人也位于四民之末,士农工商的地位归序似乎成了中国封建社会亘古不变的模式.然而到了19世纪末20世纪初,随着民族危机日益加深,商战呼之欲出,商人团体相继成立,商会诞生,商人政治意识提高并且对政治广泛参与,使商人的社会地位发生了根本性的变化.商人阶层坚持不懈地努力终于迎来了清政府自上而下的重商措施的出台.清延设立商部以指导商人组织,制定商律以规范商人行动,颁行一系列工商的法规以奖商恤商,一系列新经济政策的实施使社会舆论开始从抑商转为誉商,商人在社会上广受赞扬,官员也开始纷纷投资经商.所有这些,促进了中国新的绅商阶层的形成,并进而带动了整个商人阶层随之崛起.     

Relations among Sadness Regulation,Peer Acceptance,and Social Functioning in Early Adolescence: The Role of Gender

Using a multi‐informant approach, this study examined emotion regulation within the social context of White and Black adolescent peer groups by assessing two aspects of sadness expression management (i.e., inhibition, disinhibition) and their linkages to peer acceptance and social functioning as a function of gender and ethnicity. Seventh‐ and eighth‐grade adolescents (N = 155, 52 percent female, 54.8 percent Black) completed self‐reports and peer nominations of sadness management and sociometric ratings of peer acceptance. Parents rated their child's social competence and social problems. Results revealed specific patterns of sadness regulation across informants that were associated with social functioning and varied by gender, but not ethnicity. Boys were more likely than girls to minimize sadness displays; boys who violated this pattern had lower peer acceptance and higher parent‐rated social problems. In contrast, although girls were rated as displaying overt sadness more frequently than boys, this was unrelated to peer acceptance.     

Assessing the Concept of the ‘Insecure‐Other’ Category in the Cassidy–Marvin Scheme: Changes Between 4 and 6 Years in the English and Romanian Adoptee Study

We set out to explore the meaning of the attachment categories in the Cassidy/Marvin strange situation procedure, as employed in the home, using data from a longitudinal study of children adopted into UK families up to the age of 42 months from Romanian institutions, and of adopted children without the experience of institutional care––both groups being assessed at 4 and 6 years of age. Inter‐rater reliability was found to be good. Security (meaning the use of the parent as a secure base and no negative behavior on reunion) was the modal categorical rating in both the institution‐reared and comparison groups, but the category of anomalous non‐normative behavior (meaning a lack of any ordered attachment behavior as covered by the standard ratings), previously labeled ‘insecure‐other’, was more common in the institution‐reared children. Because this was unassociated with the usual manifestations of insecurity (such as avoidance or resistance) and because it was largely evident in interactions with the stranger, it is concluded that the adjective ‘insecure’ was not appropriate. Although this ‘insecure‐other’ category was associated with disinhibited attachment as reported by parents (meaning a lack of differentiation among adults, a willingness to go off with strangers and a lack of checking back with parents in anxiety‐provoking situations), it did not prove to be a good index of disinhibited attachment because changes over time in the ‘insecure‐other’ category were not associated with changes in the rate of disinhibited attachment. Also, whereas the rate of ‘insecure‐other’ fell markedly in the institution‐reared group between 4 and 6 years of age, it rose in the comparison group, raising queries over its meaning.     

Interplay between Friends' Aggression and Friendship Quality in the Development of Child Aggression during the Early School Years

The aim of this study was to investigate the unique and combined role of friendship quality and friends' aggression in regard to the persistence of young children's physical aggression from kindergarten to grade 2. The sample included 1555 children (808 girls) assessed annually using teacher ratings. Two theoretical perspectives (i.e., the social learning and the social bonding perspectives) served as frameworks to guide the analyses and interpret the results. In line with the social learning perspective, friends' aggression was related to a significant increase in children's physical aggression. However, in line with the social bonding perspective, good friendship quality played both a compensatory and a protective role, by, respectively, reducing children's initial level of physical aggression and by mitigating, albeit marginally, the associations between friends' and children's physical aggression. These results suggest that fostering a positive relationship between friends in the early school years may decrease physical aggression even if the friends are aggressive.     

产权制度与两种含义所有制的关系——兼论所有制理论创新的理论依据和必要性

所有制分为狭义和广义,狭义所有制是生产资料占有方式,广义所有制是生产关系总和.产权制度是各经济主体之间权、责、利关系的设定及其处理规则的制度安排.三者之间既有区别又有联系.区别主要表现在:内涵不同;在经济体中的地位和功能不同;变化的结果不同.联系在于:三者共同构成一个制度体系;现实的所有制关系和经济成分需要产权制度来规范和实现.三者的辩证统一关系说明所有制理论中不能没有产权理论.中国经济改革与发展必须由富含产权理论的所有制理论作指导,但传统所有制理论中产权理论不足.我们必须在充分挖掘马克思所有制理论中的产权理论基础上,批判地吸收西方产权理论的优秀成果,丰富、创新传统所有制理论,使马克思主义所有制理论更具指导性.