分类并结合专业特色的电子综合课程设计

为在有限的学时内切实提高学生的专业技能,提出将电子综合课程设计按照PCB板设计与制作、单片机与可编程逻辑控制(CPLD)综合运用、数字信号处理(DSP)器件的应用、嵌入式平台开发4个方向进行分类实践教学,并结合专业特色,解剖气象仪器,增加学生工程实践经验。     

损失规避下的指数跟踪问题及其粒子群算法求解

随着指数衍生产品日益受到重视,指数化投资组合常被传统的消极基金管理者或机构所采用,而用有限的资金按指数构成比例进行投资显然是不现实的,所以指数的最优误差追踪就显得更加重要。将追踪误差定义为证券投资组合收益率与所追踪的指数基准收益率之差的均值平方和的平方根,建立了基数约束（即总资产数不超过某个特定整数K）下考虑投资者损失规避决策偏好的跟踪误差最小化模型,并设计了一个粒子群算法求解模型。实际算例表明,所构建的模型和算法是有效的。     

HSK口部动词研究及启示

口部动词是动词的特殊小类,也是对外汉语集合式词汇教学的一个重要集合。通过对《汉语水平考试词汇与汉字等级大纲》中口部动词的研究发现：口部动词可分为四类,且义项丰富,多义口部动词义项泛化的基本形式为：＂口部动作义→一般口部动作义→引申义或比喻义＂;口部动词的使用频度与大纲的设计基本一致。根据这一研究结果,对外汉语口部动词的教学可以遵循区分频度原则、分别释义原则和汉外对比原则以提高教学效果,并可以针对不同级别的学生确定不同的教学设计思路。     

Length-based vehicle classification in multi-lane traffic flow

For the realtime classification of moving vehicles in the multi-lane traffic video sequences, a length-based method is proposed. To extract the moving regions of interest, the difference image between the updated background and current frame is obtained by using background subtraction, and then an edge-based shadow removal algorithm is implemented. Moreover, a thresholding segmentation method for the region detection of moving vehicle based on location search is developed. At the estimation stage, a registration line is set up in the detection area, then the vehicle length is estimated with the horizontal projection technique as soon as the vehicle leaves the registration line. Lastly, the vehicle is classified according to its length and the classification threshold. The proposed method is different from traditional methods that require complex camera calibrations. It calculates the pixel-based vehicle length by using uncalibrated traffic video sequences at lower computational cost. Furthermore, only one registration line is set up, which has high flexibility. Experimental results of three traffic video sequences show that the classification accuracies for the large and small vehicles are 97.1% and 96.7% respectively, which demonstrates the effectiveness of the proposed method.     

基于DSP的可同步合闸智能断路器

介绍了一种基于DSP技术的可同步重合闸智能断路器.它采用傅里叶级数的滤波算法来判断最佳重合闸角,从而减弱重合闸时的瞬时电流.在探讨DSP技术的基础上,对该硬件电路和软件进行了设计,仿真结果与预期吻合较好.     

求解0/1背包问题的烟花算法研究

0/1背包问题是一个典型的NP难题,具有重要的理论研究价值,也具有广泛的应用基础。借鉴北京大学关于烟花算法的新近成果,尝试考虑二者的结合,初步设计并实现了求解0/1背包问题的烟花算法,开展了较为充分的实验,并作了相关分析与探讨。     

Grover量子搜寻算法的线性光学实现

利用线性光学元件和单光子来编码量子比特,可给出Grover量子搜寻算法的光学实现方案。该方案可以推广到多个量子比特的情况。     

皎然诗歌批评标准和诗歌分类标准的矛盾性和统一性

皎然是中唐著名的诗人和诗论家,他的《诗式》是唐代诗论发展史上的一座丰碑,它不仅总结了唐诗由兴而盛的成功经验,也反映了“安史之乱”后唐诗由盛而衰的过程。在《诗式》中,他提出了“五格论诗”的诗论方法,这“五格论诗”的方法和皎然的文艺思想有着密切的联系,既表现出方法自身的矛盾,也表现出统一于文艺思想的倾向,既显出矛盾性,也显出统一性。本文拟就皎然诗评标准内在的矛盾性和统一性提出看法,以求教于方家。     

Characteristics of electricity consumption of different industry types considering atmospheric condition

Reducing greenhouse gases (RHG) is going on actively in the international movement. In the field of architecture, RHG is an inevitable work. To establish a plan for RHG, firstly we need to reduce energy consumption. Greenhouse gas generated by energy consumption is the main cause of global warming. For this we should know that how much electricity consumption we use. The research targets of this study are commercial buildings with various businesses. Their electricity consumption was analyzed by business units rather than buildings. Each business was divided into 13 sectors according to industrial classification and electricity consumption was analyzed for each industry. For commercial buildings, the electricity consumption is done by the private sector and construction management is an autonomy system in private instead of an integrated management system. In this study, we classified and analyzed the electricity consumption characteristics according to collected data, analyzed the relationship between the electricity consumption with atmospheric temperature through SPSS, and developed an electricity prediction model.     

由简表的变化看《中国图书馆分类法》（第五版）的修订

通过对比《中国图书馆分类法》第四版和第五版简表部分的变化,分析了第五版的修订背景和修订特色。