植物硝态氮营养

硝态氮是氮素形态之一,植物体对硝酸氮的吸收是由一种可以产生电的协同运输机制来驱动的,硝酸氮的同化是在硝酸还原酶和亚硝酸还原酶的作用下还原成NH4 。硝态氮的一般营养功能可以通过近些年来的科技文献表现出来,主要有增施硝态氮可以提高作物的产量;通过控制硝态氮的数量可以防止硝态氮在蔬菜中积累,从而改善蔬菜的品质。另外,硝态氮在土壤中的积累与淋失对环境所造成的污染严重,本文将提出一些措施进行防治。硝态氮能促进铵态氮的吸收,平衡吸收氮素利于植物的生长发育。另外,硝态氮研究也存在不足,其中硝态氮在树木中研究还不算深入。     

何处是归程?--从徐坤小说《厨房》看当代中国女性解放的困境与出路

本文从对当代女作家徐坤的小说<厨房>的解读中,分析当代中国女性解放面临的家庭困境和社会困境,探讨了解决女性家庭角色与社会角色矛盾冲突的出路,认为女性解放最理想和最终的出路是男女两性共同建构平等和谐的两性世界.     

语段理论下汉语旁格宾语的生成

虽然以往研究能解释汉语中旁格宾语的生成机制,但仍存在些许不足.语段理论能为旁格宾语的生成机制提供了一种新的解释：在旁格宾语结构中,动词的内论元为基础生成的空宾语e,旁格宾语实际上是介词脱落后的介词词组右附加到VP.由于e 不具有语音特征,不会被拼读出来.因此在语音系统拼读后,最终得到旁格宾语出现在动词之后.     

e-He弹性散射的相移计算

用与半经典交换势（ＳＣＥ）不同的三种交换势计算了低能ｅ－Ｈｅ弹性散射的相移，结果表明，这三种势均在不同程度上改善了ＳＣＥ势的结果．     

毛细电色谱中流动相的选择

本文以实验为依据，介绍了毛细电色谱中用ＯＤＳ 反相柱分离中性物时流动相的选择     

“后百亿时代”:以文化自律与创新推动电影产业再度振兴

中国电影在赢得100亿票房的业绩后,事实上,正面临着新一轮的文化挑战。突出的问题在于,当下市场严重失序,失去了文化的自律性,逐步形成了一种市场金本位的定势。吸金的思维定势代替了人文的主体性以及艺术的创新与智慧,开启了一种仅以GDP增长为目标的市场方向,造成人文原创性的匮乏以及大片的文化贫血症。针对此种现状,我们应当考虑的不是创造了多少GDP新高,而是今后能否以文化的自律性与艺术的创新精神来提升电影的思想力度与文化品格,在社会审美的意义上实现向现代审美的转换。电影作为文化产品,其固有的精神本源性及其核心价值应是第一位的。因此,我们必须自觉地肩负起时代赋予的文化使命与责任,引导我们的电影产业在与文化的和谐共生中实现再度振兴,为将电影产业做成我们国民经济支柱性产业的伟大目标而努力奋进。     

A longitudinal study of depressiveness in children in public care

Rajhvajn Bulat L. A longitudinal study of depressiveness in children in public care Int J Soc Welfare 2010: 19: 412–423 © 2009 The Author, Journal compilation © 2009 Blackwell Publishing Ltd and the International Journal of Social Welfare. The aim of this article is to analyse the challenges involved when making longitudinal observations of depressiveness in children raised in public care. The first measurement comprised 375 children from children's homes and foster families; however, most of the results are based on an analysis of the 139 children who participated in both parts of the research. We used the Child Depression Inventory and the anxiety/depression subscales of Youth Self Report and Child Behaviour Checklist as measures of depressiveness. The comparison of results from the first and second measurements showed that depressiveness in children in public care decreased over time. Children who grew up in children homes were, in the first measurement, more depressed than those living in foster families, but after five years that difference had disappeared. Furthermore, decrease in depressiveness is predominantly associated with less frequent delinquent, aggressive or hyperactive behaviour, less withdrawal and better control over uncomfortable emotions.     

相变界面流动技术的计算精度

对用于固液相变问题数值模拟的界面流动技术的精度进行了讨论，分析表明对移动界面项使用一阶有限差分不能精确地描述界面的运动，特别是在解决如爆融情况下的高热流问题，建议使用二阶方法，其在所有情况下均可保证足够的精度。     

Coming Out and Coming Home

This paper draws on the testimonies of British disabled lesbians and gay men about their experience of coming out as gay, and coming out as disabled. They reflect on the different aspects of their identity, and the interrelation of their sexuality and their disability. The respondents share their experiences of exclusion and marginality in both the disability and gay communities, and discuss where they feel most at home as disabled lesbians and gays.     

A Retrial Queue with a Constant Retrial Rate,Server Downs and Impatient Customers

ABSTRACT

In this paper, we consider a retrial queueing system consisting of a waiting line of infinite capacity in front of a single server subject to breakdowns. A customer upon arrival may join the queue (waiting line) or go to the retrial orbit (another queue) to retry for service after a random time. Only the customer at the head of the retrial orbit is allowed to retry for service. Upon retrial, the customer enters the service if the server is idle; otherwise, it may go back to the retrial orbit or leave the system (become impatient). All the interarrival times, service times, server up times, server down times and retrial times are exponential, and all the necessary independence conditions in these variables are assumed. For this system, we provide sufficient conditions under which, for any given number of customers in the orbit, the stationary probability of the number of customers in the waiting line decays geometrically. We also provide explicitly an expression for the decay parameter.