新疆少数民族教育政策的发展历程研究

新中国成立以来,党和国家采取了一系列特殊政策和措施,促进民族教育事业快速发展,取得了举世瞩目的成就,为各少数民族培养了数以百万计的各级各类专业人才。本文对新中国成立以来的新疆少数民族教育政策作了分阶段的梳理,总结了民族教育政策的发展变化及特点,并结合当前民族教育政策存在的问题,提出了完善新疆少数民族教育政策的对策建议。     

践行科学发展观，促进高校教学科研协调发展

科学发展观提出,要全面协调可持续发展。教学、科研作为高校的两大基本职能,如何正确处理二者之间的关系,关系到学校的办学定位和办学质量。本文总结了目前高校教学与科研关系的状况,分析了二者之间产生矛盾的原因,提出了促进教学科研协调发展的对策建议。     

学前儿童对情绪表达规则的认知发展

情绪表达规则是儿童社会化的结果,对儿童的情绪健康发展和社会交往产生着重委的澎响,本文考察了学前儿童情绪表达规则的概念、研究方法及国内外关于儿童情绪表达规认知能力发展的棚关姘究。结果表明,在对学前儿童情绪表达规则发展的年龄和性别差异上,目前研究结果存在较大分歧;家庭情绪环境对儿童情绪表达规则能力的发展存在显著影响;儿童的情绪表达规则能力与其社会能力存在正相关。     

近程舰炮武器系统拦截高速目标发展研究

反舰导弹的超声速特性使得现役近程舰炮武器系统的反应时间严重不足,毁伤能力明显下降.针对高速目标,分析了目标对系统的随动性能需求,研究了系统情报处理、传感器捕获跟踪及火控解算等时间特征参数、及系统毁伤能力,并提出了解决问题的初步想法.分析结果表明,可以提高近程舰炮武器系统对超高声速目标的跟踪毁伤能力,实现对该类目标的有效拦截.     

正确把握和处理防化科研发展和建设中的几个重要问题

结合防化科研工作实际,从四个方面谈了如何在防化科研中贯彻落实科学发展观、提高自主创新能力,推动防化科研又好又快发展的初步想法。     

Bayesian strategies for dynamic pricing in e‐commerce

E‐commerce platforms afford retailers unprecedented visibility into customer purchase behavior and provide an environment in which prices can be updated quickly and cheaply in response to changing market conditions. This study investigates dynamic pricing strategies for maximizing revenue in an Internet retail channel by actively learning customers' demand response to price. A general methodology is proposed for dynamically pricing information goods, as well as other nonperishable products for which inventory levels are not an essential consideration in pricing. A Bayesian model of demand uncertainty involving the Dirichlet distribution or a mixture of such distributions as a prior captures a wide range of beliefs about customer demand. We provide both analytic formulas and efficient approximation methods for updating these prior distributions after sales data have been observed. We then investigate several strategies for sequential pricing based on index functions that consider both the potential revenue and the information value of selecting prices. These strategies require a manageable amount of computation, are robust to many types of prior misspecification, and yield high revenues compared to static pricing and passive learning approaches. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

互联网中文搜索引擎存在的问题与发展趋势探析

搜索引擎是互联网信息检索技术的核心,中文搜索引擎与国外相比存在着搜索引擎覆盖率低、查准率不高、检索精度差、更新速度慢、无法控制网络信息的动态变化、对信息内容难于控制和管理等问题。对此,提出了中文搜索引擎从单一查询工具向综合化、全功能服务发展;分类主题一体化,检索语言向自然语言发展;查询智能化,向多国化和多语种化发展;搜索引擎集成化、网络资源著录标准化及利用智能代理技术的信息检索等对策。     

加强和改进警卫部队思想政治工作的几点思考

思想政治工作是政治建设中最核心的内容。在新的历史条件下,对警卫部队思想政治工作提出了新的更高的要求,思想政治工作必须不断改革创新,准确把握内在的特点规律,增强时代感、针对性、实效性和主动性。     

关于新疆城乡人口素质差距的思考

中国城乡差距的持续存在和不断扩大,引起社会各界的高度关注。城乡人口素质差距是中国客观存在的事实。素质低下不仅制约农村广大农民增收致富,也是城乡二元结构持续存在的重要原因。人口素质差距是城乡差距中最根本的差距,通过教育等手段提高农村人口素质是缩小城乡差距的关键。只有消除城乡人口素质的差距,才能真正实现城乡协调发展。     

The impact of demand uncertainty on product line design under endogenous substitution

The existing product line design literature devotes little attention to the effect of demand uncertainty. Due to demand uncertainty, the supply‐demand mismatch is inevitable which leads to different degrees of lost sales depending on the configuration of product lines. In this article, we adopt a stylized two‐segment setup with uncertain market sizes and illustrate the interplay between two effects: risk pooling that mitigates the impact of demand uncertainty and market segmentation that facilitates consumer differentiation. Compared to downward substitution, inducing bidirectional substitution through product line decisions including quality levels and prices can yield greater risk pooling effects. However, we show that the additional benefit from the risk pooling effect cannot compensate for the reduced market segmentation effect. We demonstrate that the presence of demand uncertainty can reduce the benefit of market segmentation and therefore the length of product lines in terms of the difference between products. We also propose three heuristics that separate product line and production decisions; each of these heuristics corresponds to one particular form of demand substitution. Our numerical studies indicate that the best of the three heuristics yields performance that is close to optimality. © 2015 Wiley Periodicals, Inc. Naval Research Logistics 62: 143–157, 2015