吸顶灯罩便携拆装器的设计

针对吸硕灯装拆不方便的问题,依据负压原理,设计了一种吸顶灯罩便携拆装器,通过螺旋式吸盘将灯罩吸住旋 转将灯罩取下。同时,设计了内、外杆形式的支撑构件,使得产品满足高空作业要求。应用结果表明装置能有效解决生 活中灯罩清洁难问题,产品制造成本低,易推广和普及。     

Efficient Estimation of the Partly Linear Additive Hazards Model with Current Status Data

This paper focuses on efficient estimation, optimal rates of convergence and effective algorithms in the partly linear additive hazards regression model with current status data. We use polynomial splines to estimate both cumulative baseline hazard function with monotonicity constraint and nonparametric regression functions with no such constraint. We propose a simultaneous sieve maximum likelihood estimation for regression parameters and nuisance parameters and show that the resultant estimator of regression parameter vector is asymptotically normal and achieves the semiparametric information bound. In addition, we show that rates of convergence for the estimators of nonparametric functions are optimal. We implement the proposed estimation through a backfitting algorithm on generalized linear models. We conduct simulation studies to examine the finite‐sample performance of the proposed estimation method and present an analysis of renal function recovery data for illustration.     

武林秘籍:武侠小说"情节模式"论之一

“武林秘籍”在武侠小说中频频出现,皆受瞩目,是武侠小说常见模式之一。“武林秘籍”模式导因于“武”,从“武林盟主”、“武林至尊”的区别中,可以发现在武侠小说中,武功是最关键的因素。“武林秘籍”的设计具有高超性、隐秘性、神异性、灵妙性、正宗性、道德性的特点,对小说的情节设计及推展具有枢纽作用。     

Forecast of the expected non-epidemic morbidity of acute diseases using resampling methods

In epidemiological surveillance it is important that any unusual increase of reported cases be detected as rapidly as possible. Reliable forecasting based on a suitable time series model for an epidemiological indicator is necessary for estimating the expected non-epidemic indicator and to elaborate an alert threshold. Time series analyses of acute diseases often use Gaussian autoregressive integrated moving average models. However, these approaches can be adversely affected by departures from the true underlying distribution. The objective of this paper is to introduce a bootstrap procedure for obtaining prediction intervals in linear models in order to avoid the normality assumption. We present a Monte Carlo study comparing the finite sample properties of bootstrap prediction intervals with those of alternative methods. Finally, we illustrate the performance of the proposed method with a meningococcal disease incidence series.     

Nonparametric Stochastic Discount Factor Decomposition

Stochastic discount factor (SDF) processes in dynamic economies admit a permanent‐transitory decomposition in which the permanent component characterizes pricing over long investment horizons. This paper introduces an empirical framework to analyze the permanent‐transitory decomposition of SDF processes. Specifically, we show how to estimate nonparametrically the solution to the Perron–Frobenius eigenfunction problem of Hansen and Scheinkman, 2009. Our empirical framework allows researchers to (i) construct time series of the estimated permanent and transitory components and (ii) estimate the yield and the change of measure which characterize pricing over long investment horizons. We also introduce nonparametric estimators of the continuation value function in a class of models with recursive preferences by reinterpreting the value function recursion as a nonlinear Perron–Frobenius problem. We establish consistency and convergence rates of the eigenfunction estimators and asymptotic normality of the eigenvalue estimator and estimators of related functionals. As an application, we study an economy where the representative agent is endowed with recursive preferences, allowing for general (nonlinear) consumption and earnings growth dynamics.     

空穴传输层厚度对OLED性能的影响

该文采用聚乙烯基咔唑(PVK)作为空穴传输层,8-羟基喹啉铝(Alq3)作为发光层,制备了结构为ITO/PVK(0～60nm)/Alq3(60nm)/Mg:Ag/Al的有机发光二极管。通过测试器件的电流-电压-发光亮度特性,研究了空穴传输层厚度对有机发光二极管器件性能的影响,优化了器件功能层的厚度匹配。实验结果表明,有机发光二极管的光电性能与空穴传输层的厚度密切相关,当空穴传输层厚度为15nm时,有机发光二极管器件具有最低的起亮电压、最高的发光亮度和最大的发光效率。     

复自适应均衡器的研究及实现

通过对HFC广播有线电视信道中的16QAM信号的研究，分析了噪声及信道特性对QAM信号的影响，提出了用自适应均衡器来提高QAM信号的传输质量，并用复杂可编程逻辑器件(CPLD)实现该均衡器。采用CPLD技术可大大增加均衡器的可靠性、灵活性，同时也缩短了设计周期。该均衡器可运用于实际的有线通信系统，从而为复信号的均衡提供了一个技术方案。     

刘老涧船闸应对超高船舶通航安全管理探索

船舶大型化给船闸通航安全管理带来了很大挑战。刘老涧船闸通过安装超高报警装置等来应对超高船舶对船闸安全通航的影响。阐述3种超高报警装置在船闸通航安全管理中的作用和意义,着重介绍红外线报警器的选型、安装、故障诊断及排除。     

自制单片机技术综合实验开发装置培养学生综合素质

为了满足教学改革对实验教学提出的新要求,自行设计和制作了"单片机技术综合实验开发装置",已用于教学实践,收到较好效果.     

一种高效絮凝分离谷氨酸菌体装置的实验研究

将谷氨酸发酵液用脱乙酰甲壳素絮凝处理,设计了一种高效絮凝分离装置,经台架实验表明,该装置具有分离彻底、效率高等特点;研究了絮凝剂用量、装置的固定段、循环段及进料流量等因素对该装置絮凝分离效果的影响