Average up-sample network for crowd counting

Applied Intelligence - The task of crowd counting is receiving increased attention recently, but it still faces many challenges, such as extremely dense scene, scale variation and background...     

关于客体世界、主观概念与客观概念

本文阐述了客体世界、主观概念与客观概念等的界说及其相互关系。     

Python语言在轮胎带束层后处理分析中的应用

利用Python的Numpy,Pandas和Matplotlib等数据分析工具和3D图形化工具,分析轮胎带束层的受力。结果表明,该方法对径向负荷下的带束层张力和帘线受力分析较为全面,具有可行性和扩展性,实现了帘线张力的3D可视化分析,有效提高了带束层仿真数据的利用率。     

基于希尔伯特变换的数字全息位相重构技术

为了提高数字全息重构的精度,采用希尔伯特变换的方法对数字全息位相重构进行了理论分析和实验验证。首先利用傅里叶变换滤除全息图中的0级项,然后运用希尔伯特变换对已经滤除0级项的全息图实现90°相移,并构造出解析信号,从而可以求出物体的包裹位相,最后利用最小二乘法进行位相解包裹得到物体的真实位相;并将希尔伯特变换法与常规傅里叶变换法重构的实验结果进行了对比和分析,获得了标准偏差的对比数据。结果表明,该方法比常规傅里叶变换法重构精度要高。这一结果对提高位相重构的精度是有帮助的。     

一种基于SQPC/OCS的二维光正交码设计及性能研究

以同步二次素数码(SQPC)作为时间扩频序列,单重合序列(OCS)作为波长跳频序列,构造了一种新的二维光正交码SQPC/OCS,并对其误码性能及码字容量进行了理论分析和仿真比较。理论分析表明：在同码长、同波长数条件下,SQPC/OCS与 2D-QPC误码率相等,但SQPC/OCS波长数可以是任何数,不局限于素数,从而增加波长码片可以降低误码率;与EPC/OCS相比,SQPC/OCS误码率更低。SQPC/OCS码字容量远远高于2D-QPC和EPC/OCS码字容量。仿真结果表明：当p=7、q=13时,SQPC/OCS误码率比2D-QPC降低接近2个数量级;当p=11、q=15时,SQPC/OCS与EPC/OCS相比,当用户数为20时,误码率相差达4个数量级。     

考虑改进潮流转移熵的电力系统融冰预防控制

从熵理论角度出发,对现有的潮流转移熵模型进行改进,综合考虑转移潮流的分布均衡性及各线路的负载率,提出了一种考虑改进潮流转移熵的电力系统融冰预防控制方法。该方法将改进的潮流转移熵作为约束条件引入到控制模型中,将发电机出力再调整作为重点控制措施,得到融冰预防控制模型。通过对IEEE-30系统进行仿真,结果证明该方法提出的控制策略能够有效减小因融冰断线对系统造成的冲击,降低了系统断线后的状态综合严重度,有效提高电力系统在冰灾情况下的安全水平。     

Removal of anionic dyes from aqueous solutions by adsorption of chitosan-based semi-IPN hydrogel composites

Semi-IPN hydrogel composites for dye adsorption studies were prepared via photopolymerization of poly(ethylene glycol) (PEG) macromer and acrylamide (AAm) monomer in the presence of chitosan (CS). Swelling properties and kinetics of the hydrogel composites were investigated in aqueous solution and Acid Red 18 (AR 18) solution. The adsorption studies showed that the adsorption capacity for AR 18 increased with the increase of initial dye concentration and chitosan content in the hydrogels, but decreased with the increase of pH and ionic strength of dye solutions. Absorption kinetics of AR 18 followed pseudo second-order kinetic model at pH 2.0. The adsorption capacities for Acid Orange 7 (AO 7), Methyl Orange (MO) and Basic Violet 14 (BV 14) were also examined at pH 2.0, and the equilibrium adsorption data of AR 18, AO 7 and MO well fitted the Langmuir isotherm. The hydrogel composites could be potentially used as absorbents for anionic dye removal in wastewater treatment process.     

Parallel linear genetic programming for multi-class classification

Motivated by biological inspiration and the issue of instruction disruption, we develop a new form of Linear Genetic Programming (LGP) called Parallel LGP (PLGP) for classification problems. PLGP programs consist of multiple lists of instructions. These lists are executed in parallel after which the resulting vectors are combined to produce the classification result. PLGP limits the disruptive effects of crossover and mutation, which allows PLGP to significantly outperform regular LGP. Furthermore, PLGP programs are naturally suited to caching due to their parallel architecture. Although caching techniques have been used in tree based GP, to our knowledge, there are no caching techniques specifically developed for LGP. Thus, a novel caching technique is also developed with the intrinsic properties of PLGP in mind, which can decrease fitness evaluation time by almost an order of magnitude for the classification problems.     

沿次对角线带宽为m的稀疏矩阵压缩存储的通用寻址公式

本文属于数据结构的课题,它将文献[2]与[3]中给出的沿主对角线具有m条非零元素的稀疏矩阵压缩 存储寻址公式推广到沿次对角线分布的类似矩阵上,得到了新的寻址公式,并用例子验证了公式的正确性。