论行政权力运行绩效的偏离与回归——关于行政权力制约的一种新的解说

行政权力的公共性特征使公众对它抱有期望 ,然而行政权力的人格化却使行政权力的运行绩效背离公众期望 ,出现了偏差。要使这种偏离回归 ,需要从行政权力产生的源头、行政权力体制的结构和行政权力的惩戒等三个方面采取相应措施     

知识密集型服务业创新轨迹演化研究:P-KIBS与T-KIBS的对比

长期以来创新轨迹的研究以制造业为主要的研究对象,技术导向的创新轨迹研究无法充分捕捉服务创新活动的互动性、非技术性和开放性。文章在综述服务业创新轨迹研究的基础上,通过纵向多案例的研究设计,选择6家知识密集型服务业企业进行案例分析。通过3家P-KIBS和3家T-KIBS的对比分析,识别不同知识密集型企业创新轨迹的共性和差异性,揭示服务业创新轨迹的演化路径。研究发现,P-KIBS和T-KIBS发展出不同的创新轨迹,前者从顾客驱动创新发展为与顾客合作创新最终实现基于创新网络的协同,后者则是从技术驱动创新发展为基于技术的商业模式创新最终实现基于创新网络的协同。内部技术能力的提升和外部创新网络之间的协同和互补是知识密集型服务业创新能力的重要来源。     

无阻尼单摆运动方程反函数形式的精确解

利用函数进行变换,将单摆的二阶非线性微分方程化为一阶非线性微分方程进行积分求解,再利用三角函数变换,最后求出用Legendre椭圆积分表示的无阻尼单摆运动方程反函数形式的精确解。     

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。     

考虑黏性及压缩效应的旋涡运动特性

采用扩散速度法处理黏性作用项的离散涡法，数值模拟了旋涡在黏性不可压流场中的运动；推导了可压缩流中的旋涡运动方程，对不可压缩流中的Biot-Savart方程进行了可压缩修正，进而用离散涡方法求解出非定常、不稳定、可压缩流场中的旋涡运动。分析了胀量及黏性扩散作用对旋涡运动的影响，通过大量长时间行为的数值试验得出了一系列结果。结果表明：为了真实地反映旋涡在实际流体中的运动规律，必须考虑黏性及压缩性的影响。     

Some Asymptotic Formulas for a Brownian Motion With a Regular Variation From a Parabolic Domain

Consider a Brownian motion with a regular variation starting at an interior point of a domain D in R^{d + 1}, d ? 1 and let τ_D denote the first time the Brownian motion exits from D. Estimates with exact constants for the asymptotics of log?P(τ_D > T) are given for T → ∞, depending on the shape of the domain D and the order of the regular variation. Furthermore, the asymptotically equivalence are obtained. The problem is motivated by the early results of Lifshits and Shi, Li in the first exit time, and Karamata in the regular variation. The methods of proof are based on their results and the calculus of variations.     

Parental Work Schedules and Children's Cognitive Trajectories

Previous work has shown an association between mothers' nonstandard work schedules and children's well-being. We built on this research by examining the relationship between parental shift work and children's reading and math trajectories from age 5/6 to 13/14. Using data (N=7,105) from the National Longitudinal Survey of Youth and growth curve modeling, we found that children's math and reading trajectories were related to parents' type of nonstandard shifts (i.e., evening, night, or variable). We found that having a mother who worked more years at a night shift was associated with lower reading scores, having a mother work more years at evening or night shifts was associated with reduced math trajectories, and having a father work more years at an evening shift was associated with reduced math scores. Mediation tests suggest that eating meals together, parental knowledge about children's whereabouts, and certain after-school activities might help explain these results.     

On the power of durbin-watson statistic against fractionally integrated processes

This paper provides the theoretical explanation and Monte Carlo experiments of using a modified version of Durbin-Watson ( D W ) statistic to test an 1 ( 1 ) process against I ( d ) alternatives, that is, integrated process of order d, where d is a fractional number. We provide the exact order of magnitude of the modified D W test when the data generating process is an I ( d ) process with d E (0. 1.5). Moreover, the consistency of the modified DW statistic as a unit root test against I ( d ) alternatives with d E ( 0 , l ) U ( 1 , 1.5) is proved in this paper. In addition to the theoretical analysis, Monte Carlo experiments show that the performance of the modified D W statistic reveals that it can be used as a unit root test against I ( d ) alternatives.     

柔性机器人的模糊神经网络控制研究

对具有未知或变化动力学特性的两连杆柔性机器人的轨迹跟踪问题进行了研究。采用Lagrange-Euler 方程建立了柔性机器人的动力学方程。鉴于柔性机器人的高度非线性和复杂性,用智能控制策略对系统进行控制,其中在系统的反馈控制回路上设计了模糊逻辑控制器,在前馈回路上设计了动态回归神经网络控制器。在三组不同阶跃输入条件下,对模糊逻辑及智能控制器进行了仿真研究。结果证明该方案可使系统性能得到极大的改善。     

影视作品字幕翻译中跨文化交际信息的转换

文章从跨文化交际信息转换的视角入手,阐述在影视作品字幕翻译中如何处理由于东西方文化差异造成的语言差异,主张对字幕翻译源语言在不同语境中采用不同的翻译手段,即直译、意译、缩译等手法,解决由于文化差异造成的语义缺省和语义冲突,达到语言文化"功能对等"信息转换的目的.