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Search Results: 1 - 10 of 63020 matches for " 房彩丽 "
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大规模智能组卷系统中的冲突消除方法研究
,郑逢斌?,王玉璟?
计算机科学 , 2013,
Abstract: 当前的大规模智能组卷系统中采用超高频辨识技术完成任务调度,常用的反向散射耦合调度方式因缺少时间上的沟通性而容易产生冲突。为此提出了一种基于功率控制的改进帧时隙防冲突算法。在控制中,引入功率作为调控的依据,读写器按照系统信干比的情况,自主调控自身的发射功率来保证时间间隔,读写器先向作用区域中的标签发送查询命令,记录区域中的标签总数,对信号进行分组描述,在确保读写器读写距离的同时降低信号覆盖区域的繁杂度。实验表明,该方法能够确保信号覆盖区域信号繁杂的最小化,增强智能组卷系统防冲突性能,是一种有效的智能组卷系统冲突消除方法。
基于MTM和灰色关联度的混合噪声自适应滤波算法
赵雅靓,,薛长松,张晗
河南大学学报(自然科学版) , 2011,
Abstract: 利用MTM滤波算法和灰色关联度的特点,提出一种基于MTM滤波算法和灰色关联度相结合的混合噪声图像的自适应滤波算法.算法选取加窗混合噪声图像的MTM值,采用灰色
抗结核药复方制剂的体外药效学探讨

中国公共卫生 , 2000, DOI: 10.11847/zgggws2000-16-05-79
Abstract: ?通过体外药效学实验,观察利福平、异烟肼、吡嗪酰胺3种药复方制剂的抗结核杆菌活性,结果报告如下。
EDTA络合法制备 Ba(Zn1/3Nb2/3)O3纳米粉体及其热学性能
Thermal Properties of Ba(Zn1/3Nb2/3)O3Nanopowders via EDTA-Gel Method
 [PDF]

, 陆正武
Material Sciences (MS) , 2014, DOI: 10.12677/MS.2014.42008
Abstract:
采用EDTA (乙二胺四乙酸)络合法制备了Ba(Zn1/3Nb2/3)O3 (BZN)纳米粉体,利用X射线衍射仪、傅里叶变换红外光谱以及热重分析仪分析了前驱体的热分解过程和煅烧过程中的相变,同时采用扫描电子显微镜观察了最终粉体形貌。结果表明,650低温煅烧1 h得到钙钛矿相BZN陶瓷纳米粉体,粉体形状接近于球状,平均直径约40 nm,且在微区团聚形成较大的块状聚集体。所制备的粉体在1200烧结2 h得到高致密度(理论密度的98%以上)、单相的BZN陶瓷。
Ba(Zn
In掺杂SrTiO3导电薄膜光学性质的第一性原理研究
Investigation of Optical Properties of In-Doped SrTiO3 Conducting Films by First-Principles
 [PDF]

, 赵可沦
Material Sciences (MS) , 2015, DOI: 10.12677/MS.2015.53014
Abstract:
p型掺杂SrTiO3材料成功用于研制蓝光波段发光二极管、高透明导电薄膜和钙钛矿氧化物光电子器件。本文采用第一性原理平面波赝势方法对In掺杂SrTiO3/MgO(001)界面体系的电子结构与光学性质进行了计算研究,系统分析了In原子相对界面位置及浓度的变化对其光学性质的影响,并解释了In掺杂SrTiO3导电薄膜的相关实验现象。研究发现,In掺杂SrTiO3/MgO(001)界面体系的光学性质,不仅与In原子相对界面的位置有关,并且与In原子浓度密切相关。
It is well known that p-type doped SrTiO3 can successfully be applied in semiconductor diodes in a blue-light region, transparent conductive films and perovskite-oxides hetero-junction optical- electric devices. First-principles plane-wave pseudopotential (PWPP) calculations have been per-formed to investigate the electronic structure and optical properties of In-doped SrTiO3/MgO(001) interface system with the explanations of the related experiment phenomena. It is found that the optical properties of In doped SrTiO3/MgO(001) interface are dependent not only on the concen-tration of In atoms but also on the relative positions of the In atoms to the interface.
财务管理专业中外合作办学模式探讨
,
财会月刊 , 2009,
Abstract: 中外合作办学是培养职业财务经理人的有效途径。本文分析了国内外财务管理专业存在的差别,在此基础上提出财务管理专业中外合作办学的具体模式。  【关键词】中外合作办学财务管理差别中外合作办学是指外国法人组织、个人及有关国际组织同我国具有法人资格的教育机构及其他社会组织在我国境内举办的以我国公民为主要招生对象的教育教学活动。随着公司财务管理活动日趋国际化,其对复合型财务管理人才的需求不断增加。中外合作办学适应了这一需求,有利于培养出具有全球视角的国际化财务管理人才,正成为目前国内高校财务管理专业教育的一个发展方向。而国内外财务管理专业存在的差别又成为我们选择中外合作办学模式时必须考虑的重要因素。
基于介电谱无损检测库尔勒香梨的糖度和硬度

- , 2016, DOI: 10.13982/j.mfst.1673-9078.2016.5.044
Abstract: 为了探索基于介电谱无损检测库尔勒香梨糖度和硬度的可行性,本文采用同轴探头和矢量网络分析仪无损测量了三个来源共168个库尔勒香梨在20~4500 MHz范围内201个频率点下的相对介电常数和介质损耗因子,分析了介电参数的变化规律。基于x-y 共生距离的样本划分法分别将112和56个样品划分为校正集与预测集;采用无信息变量消除法和连续投影算法(SPA)分别从全介电谱 (FS) 中提取出预测糖度的144个和20个特征变量,以及预测硬度的52个和9个特征变量;基于FS和提取的特征变量建立了预测库尔勒香梨糖度和硬度的偏最小二乘、误差反向传播、最小二乘支持向量机和极限学习机(ELM)模型。结果表明:SPA-ELM模型对库尔勒香梨糖度的预测效果最好,其校正相关系数(Rc)和预测相关系数(Rp)分别为0.943和0.876,校正均方根误差和预测均方根误差分别为0.298°Brix和0.330°Brix。所有硬度预测模型的Rc和Rp均小于0.6。研究结果说明,介电谱可用于无损检测库尔勒香梨的糖度,但对硬度的预测效果较差。后期仍需进一步研究介电谱无损检测库尔勒香梨硬度的可行性。
Dielectric spectra of Korla fragrant pears were used for nondestructive measurement of their sugar content and firmness. For this purpose, the dielectric constant and dielectric loss factor at 201 discrete frequencies across the frequency range of 10 to 4500 MHz were measured in 168 Korla fragrant pears from different areas, by means of an open-ended coaxial-line probe and vector network analyzer. Patterns of changes in the dielectric properties were analyzed. Sample-set partitioning based on the method of joint x-y distances was used to group 112 samples as a calibration set and 56 samples as a prediction set. To the full dielectric spectra (FS), uninformative-variable elimination and successive projection algorithm (SPA) were applied in order to extract 144 and 20 characteristic variables (CVs) for prediction of sugar content, and to extract 52 and 9 CVs for firmness prediction, respectively. The FS and extracted CVs were subjected to partial least squares, back propagation network, least square support vector machine, and extreme learning machine (ELM) analyses to establish sugar content and firmness measurement models for Korla fragrant pears. The results revealed that the SPA-ELM model showed the best prediction for sugar content of the Korla fragrant pears: correlation coefficients of the calibration and prediction sets were 0.943 and 0.876, respectively, and the root-mean-squared errors of the calibration and prediction sets were 0.298°Brix and 0.330°Brix, respectively. The correlation coefficients of the calibration and prediction sets of all predicted models for firmness were less than 0.6. The study indicates that dielectric spectra can be used to nondestructively measure sugar content of Korla fragrant pears. However, this approach shows poor predication performance on firmness. Further studies should be conducted to evaluate feasibility of the use of dielectric spectra to nondestructively measure the firmness of Korla fragrant pears.
《气候动力学引论》即将出版

气象 , 1995, DOI: 10.7519/j.issn.1000-0526.1995.05.015
Abstract:
国外雷电监测和预报研究

气象 , 2003, DOI: 10.7519/j.issn.1000-0526.2003.11.015
Abstract:
基于内容的图像检索高层语义处理方法

图书情报工作 , 2009,
Abstract: ?从图像语义层次描述方式、图像语义抽取方法两个方面对利用语义进行图像检索的研究状况进行总结,提出建立语义模板用于支撑高层语义检索,同时应用多层次的相关反馈方法建立和修正图像低层特征与高层语义间的联系,缩小图像检索过程中的“语义鸿沟”,达到一定程度语义检索的目的。
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