在Oracle中用Java实现身份证转换

Oracle是国内主流的数据库平台之一,15位身份证与18位身份证的转换是很多基于数据库管理的信息系统所遇到的一个常见问题,文章采用Java设计了一组身份证转换函数,并利用Oracle对Java技术的支持,将这些函数扩展为一组Oracle的自定义函数,使得信息系统可在数据库一级实现对身份证号码转换的支持。     

音字转换中分层解码模型的研究与改进

音字转换是中文信息处理领域的一个重要研究方向,在语音识别、中文拼音输入中都有广泛应用。该文对音字转换中的拼音流切分歧义问题做了分析与研究,发现传统的分层隐马尔可夫解码模型在解决这个问题时存在缺陷,提出了利用语言模型知识辅助拼音流切分来改进已有的分层模型的思想。实验表明,与传统方法相比,该文的方法可以将首字准确率提高3%。     

Scintillator‐based flat‐panel x‐ray imaging detectors

Abstract— Large‐area amorphous‐silicon flat‐panel x‐ray imaging detectors were introduced commercially about 10 years ago and have seen a steady increase in both volume and number of applications since. The flat‐panel‐detector industry was made possible by manufacturing methods and equipment first developed for the display industry. Here, the different types of flat‐panel detectors are described, with focus on the scintillator‐based TFT/photodiode detector. The manufacturing process used for these detectors is explained and compared to that for displays. Detector operation is detailed, and the various medical and industrial applications are described. Finally, the performance metrics for these detectors and the impact of the performance requirements on detector design are discussed.     

Ambient‐light sensor system with wide dynamic range enhanced by adaptive sensitivity control

Abstract— A new digital ambient‐light sensor system is presented which employs two linear light sensors with different sensitivities and automatically adjusts the sensitivity based on the illumination condition. The adaptation mechanism allows a very wide range of light intensity to be detected, and the input dynamic range of the system is substantially improved from 22.5 to 45.1 dB. The proposed method does not require any additional precision bits for output data. Due to the small number of the output bits and the simple conversion process, the system can be easily integrated on the display panel.     

CMYK到L*a*b*色彩空间转换的研究

为了满足色彩复制一致性和预期性要求,寻找一种精确实用的L*a*b*与CMYK转换方法尤为重要。本文利用数理统计的二元线性回归方法在建立CMY到L*a*b*的转换模型的基础上,验证了网点呈色平面规律同样适用四色印刷,并通过最小二乘及数值分析的方法拟和各四色平面方程系数建立了CMYK到L*a*b*转换模型。随后对模型进行精度验证并修正,分析误差产生的原因,最终得到比较精确的模型。     

基于整体退火遗传算法的低功耗最佳极性搜索

针对n变量逻辑函数在不同极性下所对应的XNOR/OR电路功耗和面积不同的特点,首先用信号概率传递算法和多输入XNOR/OR(同或/或)门的低功耗分解算法建立了XNOR/OR电路的功耗估计模型.在此基础上,将基于列表技术的极性转换算法和整体退火遗传算法相结合,提出了一种针对大规模XNOR/OR电路的低功耗最佳极性搜索算法.对8个较大规模MCNC Benchmark电路测试表明,该算法搜索到的最佳极性所对应的XNOR/OR电路与极性0时的XNOR/OR电路相比,平均节省功耗和面积分别达到了84.4%和65.2%.     

虚拟加工中工件毛坯模型的建立

为解决虚拟加工中工件毛坯模型的识别问题,提出对规则形状工件毛坯采用OpenGL建模、对复杂形状工件毛坯采用美国初始图形交换规范（Initial Graphics Exchange Specification,IGES）文件进行模型数据转换的方法.该方法利用CAD软件为工件毛坯进行三维造型,生成IGES文件,然后在虚拟加工环境下读取IGES文件并生成工件毛坯模型,从而实现工件毛坯模型在新环境中的建立.经过建立具体的工件毛坯模型,验证相关理论的正确性,为在虚拟加工环境下工件毛坯模型的建立提供可行的依据.     

Methane coupling at low temperatures on Ru(0001) and Ru(11¯20) catalysts

The conversion of methane to higher hydrocarbons on single crystal Ru catalysts has been investigated using combined elevated-pressure kinetic measurements/surface science studies. The reaction consists of activation of methane on Ru(0001) and Ru(11¯20) surfaces to produce carbonaceous intermediates at temperatures between 350 and 700 K and rehydrogenation of these species to ethane and propane at 370 K. It is found that under the reaction conditions employed, the maximum yield in ethane/propane production occurs at 500 K on both surfaces. Influence of the hydrogenation temperature on the production of ethane and propane is also examined. On Ru(0001), the yields of ethane and propane maximize at = 400 K, whereas no maximum yield was observed on Ru(11 0) in the 300–500 K temperature range. Under optimum reaction conditions, hydrocarbon products consist of 16% ethane and 2% propane. High-resolution electron energy-loss spectroscopy (HREELS) has been used to identify various forms of hydrocarbonaceous intermediates following methane decomposition. An effort is made to relate the hydrocarbon intermediates identified by HREELS to the gas phase products observed in the elevated pressure experiments.     

电-热-氢综合能源系统鲁棒区间优化调度

该文采用鲁棒区间法挖掘电-热综合能源系统协调运行的潜力,以缓解风电功率的不确定性对电力系统的运行稳定性的影响,并构建风力发电与氢储能系统相结合的风-氢混合系统,考虑氢储能系统的热平衡需求,以充分发挥氢储能系统的储能效率,平抑风电的波动性。首先,介绍了考虑氢储能系统接入的电-热综合能源系统结构,并构建其数学模型;然后,以区间形式考虑风电的不确定性,构建含风电的鲁棒区间优化调度模型,使系统在所有风电出力允许区间内,均满足允许约束条件;再次,建立一种含风-氢混合系统的电-热综合能源系统鲁棒区间优化调度模型,采用对偶理论将原模型转化为单层模型进行求解,最坏情况下的风电不平衡功率由可调机组根据时变参与因子进行调整;最后,以PJM-5节点电力系统与6节点热力系统和辽宁省北部太和综合能源系统为例对所提模型进行分析,验证了模型的有效性。     

In Situ Topochemical Transformation of ZnIn2S4 for Efficient Photocatalytic Oxidation of 5-Hydroxymethylfurfural to 2,5-Diformylfuran

Photocatalytic selective oxidation of 5-hydroxymethylfurfural (HMF) coupled H₂ production offers a promising approach to producing valuable chemicals. Herein, an efficient in situ topological transformation tactic is developed for producing porous O-doped ZnIn₂S₄ nanosheets for HMF oxidation cooperative with H₂ evolution. Aberration-corrected high-angle annular dark-field scanning TEM images show that the hierarchical porous O-ZIS-120 possesses abundant atomic scale edge steps and lattice defects, which is beneficial for electron accumulation and molecule adsorption. The optimal catalyst (O-ZIS-120) exhibits remarkable performance with 2,5-diformylfuran (DFF) yields of 1624 µmol h⁻¹ g⁻¹ and the selectivity of >97%, simultaneously with the H₂ evolution rate of 1522 µmol h⁻¹ g⁻¹. Mechanistic investigations through theoretical calculations show that O in the O-ZIS-120 lattice can reduce the oxidation energy barrier of hydroxyl groups of HMF. In situ attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) results reveal that DFF^* (C₄H₂(CHO)₂O^*) intermediate has a weak interaction with O-ZIS-120 and desorb as the final product. This study elucidates the topotactic structural transitions of 2D materials simultaneously with electronic structure modulation for efficient photocatalytic DFF production.