Neural correlation of item recognition and voice source retrieval

An experiment was conducted using event-related potentials to investigate the old/new effects of the item recognition and the voice source retrieval tasks on drawing. The results indicated that (1) the old/new effect for the voice source retrieval task was much wider than that of the item recognition task; (2) the distributive characteristics of the voice source memory effect were different from those in previous studies; (3) the old/new effects for target and non-target-old drawings were similar. These results demonstrated that the voice source retrieval task is more difficult than the item recognition task for drawing, which supports the dual-process model. The experimental material and the source characteristic regulate the spatial and temporal distributions of the old/new effect for the voice source retrieval task together.     

KDS-CM： A Cache Mechanism Based on Top-K Data Source for Deep Web Query

Caching is an important technique to enhance the efficiency of query processing. Unfortunately, traditional caching mechanisms are not efficient for deep Web because of storage space and dynamic maintenance limitations. In this paper, we present on providing a cache mechanism based on Top-K data source （KDS-CM） instead of result records for deep Web query. By integrating techniques from IR and Top-K, a data reorganization strategy is presented to model KDS-CM. Also some measures about cache management and optimization are proposed to improve the performances of cache effectively. Experimental results show the benefits of KDS-CM in execution cost and dynamic maintenance when compared with various alternate strategies.     

论传感器的现代信息技术

结合传感器的定义和原理，对传感器的技术、特性、分类及发展进行了探讨。     

Genomic and genic sequence variation in synthetic hexaploid wheat （AABBDD） as compared to their parental species

In order to understand the genomic changes during the evolution of hexaploid wheat, two sets of synthetic hexaploid wheat from hybridization between maternal tetraploid wheat （AABB） and paternal diploid goat grass （DD） were used for DNA-AFLP and single strand conformation polymorphism （SSCP） analysis to determine the genomic and genic variation in the synthetic hexaploid wheat. Results indicated that more DNA sequences from paternal diploid species were eliminated in the synthetic hexaploid wheat than from maternal tetraploid wheat, suggesting that genome from parental species of lower ploidity tends to be eliminated preferentially. However, sequence variation detected by SSCP procedure was much lower than those detected by DNA-AFLP, which indicated that much less variation in the genic regions occurred in the synthetic hexaploid wheat, and sequence variations detected by DNA-AFLP could be derived mostly from non-coding regions and repetitive sequences. Our results also indicated that sequence variation in 4 genes can be detected in hybrid F1, which suggested that this type of sequence variation could be resulted from distant hybridization. It was interesting to note that 3 out of the 4 genes were mapped and clustered on the long arm of chromosome 2D, which indicated that variation in genic sequences in synthetic hexaploid wheat might not be a randomized process.     

铸钢件新型保温补贴的研究与应用

用正交试验法优选铸钢用新型保温补贴的配方，研究其制作工艺，测试了原材料 的性能，初步探讨了保温补贴的尺寸设计，并编制了计算机辅助设计程序。通过生产 试验证明，新型保温补贴具有很好的保温性能和足够的耐火度，高达１７５０℃，而且 生产成本低、工艺简便，使用中获得满意结果。     

On the Railway Basic Level Units Human Resource Management Problems and Countermeasures

近年来,铁路基层站段存在缺员现象日益严重,薪酬体系明显不适应铁路发展的现状问题,同时也存在部分基层站段内部工资分配管理不合理,铁路企业职工培训质量不过硬的问题.针对这些问题,铁路企业应采取扩大人员招收渠道,尽快补充新人员,改革工资核定体系,加强内部分配管理,提高职工培训质量等措施应对.     

论色温和照度对色彩还原的影响

在电视摄像中，光的色温和照度对色彩还原起着决定性的作用。通过理论分析，阐述了色温和照度是如何影响色彩还原的，同时提出了正确的用光方法，为达到理想的电视艺术效果，讲述了一些用光技巧。     

Co2+:ZnSiF6·6H2O的g因子随压力变化的研究

通过Co2+:ZnSiF6·6H2O的g因子随压力变化的实验数据和晶体结构数据,确定了以压力作为参量的状态方程,并采用完全对角化方法,研究了Co2+:ZnSiF6·6H2O的g因子随压力变化的行为,理论结果和实验值符合得很好.     

一种基于二阶统计的盲源分离方法及性能分析

提出了一个基于信息论原理的目标函数 ,该目标函数可以作为衡量输出分量独立性的标测度。最小化该目标函数并利用信号的非平稳特性和两种网络结构形式的等价性 ,得到一种可以进行非平稳信号的盲分离的训练算法 ;计算机仿真结果表明了该算法的有效性。最后对目标函数的性能进行了分析。     

各种材料栅格表面平面散射问题的计算

本文基于严格的电磁场理论，推导出了一种计算各种材料栅格表面平面散射问题的新方法．