科里奥利质量流量计增益控制闭环设计

在双U型科里奥利质量流量计(CMF)原理研究的基础上,设计了实现驱动系统的物理闭环和增益控制闭环.增益控制单元作为增益控制闭环和物理闭环的共用环节,由增益控制信号产生电路和自动增益控制电路组成,前者检测来自物理闭环的振动幅度信息,并与设定安全值比较,后者根据比较结果利用场效应管的压阻特性来实现自动增益控制,以保证系统稳定工作.仿真结果表明电路设计与器件选择正确,预期功能实现良好.具体阐述了增益控制闭环的设计思路和设计实体.     

High efficient moving object extraction and classification in traffic video surveillance

Moving object extraction and classification are important problems in automated video surveillance systems. A background model based on region segmentation is proposed. An adaptive single Gaussian background model is used in the stable region with gradual changes, and a nonparametric model is used in the variable region with jumping changes. A generalized agglomerative scheme is used to merge the pixels in the variable region and fill in the small interspaces. A two-threshold sequential algorithmic scheme is used to group the background samples of the variable region into distinct Gaussian distributions to accelerate the kernel density computation speed of the nonparametric model. In the feature-based object classification phase, the surveillance scene is first partitioned according to the road boundaries of different traffic directions and then re-segmented according to their scene localities. The method improves the discriminability of the features in each partition. AdaBoost method is applied to evaluate the relative importance of the features in each partition respectively and distinguish whether an object is a vehicle, a single human, a human group, or a bike. Experimental results show that the proposed method achieves higher performance in comparison with the existing method.     

浅论社会主义市场经济条件下的会计监督

针对当前大多数单位会计监督弱化极为普遍的现象，分析了会计监督及会计监督体系的含义，会计监督弱化的原因，并提出了加强会计监督的措施。     

从前卫艺术看新世纪的美育

光怪陆离的前卫艺术不论艺术界还是学术界怎样评说，但是它依然给我们新世纪的美育以如下启迪：弘扬创新精神，磨砺理性思维，养成开放意识，坚守自由节操，从而向我们生命承受限度逼进、应有的深度掘进、涉猎的广度推进和理想的精度递进，以此使我们的个体生命获得一次全新意义的解放。     

清代宦官制度与晚清宦官事件探析--兼评丁宝桢杀安德海

宦官始自周朝,终于民国.明朝宦官专权遗害无穷.清朝吸取明代教训,前期制定并实施严厉的管理制度,有效地遏制了宦官势力.晚清宦祸死灰复燃,历史赋予机遇,丁宝桢诛杀宦官安德海.     

物理审美之心理激励

本文叙述了物理审美之心理激励形式,进而指出审美情趣的培养对于造就全面素质人才、开发创造力的意义.     

女性文学流程与女性形象悖论

20世纪中国女性文学几经风雨 ,却愈来愈陷入了疲乏无力的状态中。在对女性文学流程的考察中 ,就女性文学这一衰微特征作了整体性评价 ,并由此提出了女性文学要走出这一误区 ,关键在于调整视界的建设性建议     

基于建构主义学习理论的CAI课件设计

CAI是广泛使用且行之有效的教学辅助手段，而建构主义是更符合人类认知规律的一种学习理论，两者的结合是新型的CAI课件设计的有益探索。     

L~q-Dini型核(1<q<∞)奇异积分算子交换子的端点估计

主要证明了具有Lq-Dini型核(1q∞)的奇异积分算子交换子[b,T]满足如下不等式:|{x∈Rn:|[b,T]f(x)|λ}|≤C‖b‖BMO∫Rn|f(λx)|(1+log+|f(λx)|)dx.     

Texture preserving denoising method combining total variation and wavelet shrinkage

In this paper,we propose a new image denoising method that combines total variation(TV) method and wavelet shrinkage. In our method,a noisy image is decomposed into subbands of LL,LH,HL,and HH in wavelet domain. LL subband contains the low frequency coefficients along with less noise,which can be easily eliminated using TV-based method. More edges and other detailed information like textures are contained in the other three subbands,and we propose a shrinkage method based on the local variance to extract th...