素数元旋转对称弹性布尔函数的构造与计数

通过对素数元旋转对称弹性布尔函数特征矩阵的研究,给出了其特征矩阵的若干性质,得到了素数元旋转对称布尔函数为弹性函数的一个充要条件,由此完全决定了旋转对称弹性函数的构造以及这类函数的精确计数公式,最后还给出了所有的三元、五元、七元旋转对称弹性布尔函数的构造方案与精确计数。     

基于JSP的高校应急调度系统设计与实现

随着高校的扩大,重大突发事件越来越多,但是现有传统方法处理应急事故已经力不从心,反应较慢,急需利用信息技术提高处理突发事故效率。高校应急调度系统是为了解决当前高校应急效率低,资源调度慢,事故处理不及时等问题而提出的。利用Spring和Hibernate框架来进行应急系统的开发,制作统计报表,动态显示物资信息。该系统较好地满足了当前高校在应对突发事故中的不足,对高校处理应急事故起到一定作用。     

Coupled steering control of a low torsional torque capsule robot in the intestine

In order to avoid the distortion dangers to the colon, caused by spiral-type capsule robot, a Low Torsional Torque Capsule Robot (LTTCR) is developed, capable of non-contact steering swimming motion in a tortuous pipe, filled with silicone oil. Due to the non-contact and suspension state of motion, the robot is isolated from the colon and inner pipe wall, achieving low torsional effect on the intestines. Based on the coupling principle of magnetic field, a spatial magnetic torque model is derived, while a method for detecting the critical coupling magnetic torque, in tortuous environment, is proposed. The fluid resistance torque in straight and tortuous pipes is studied, deriving the scope of stable steering. Simulation and experimental results have shown that higher commutation and slip angles are beneficial to robot steering, and the swimming speed of LTTCR is higher and the twist impact on the colon, during the steering process, is lower. The LTTCR has a promising prospect in non-invasive examination applications in the sectors of diagnosis and treatment, inside the human body.     

校本共享型多媒体教学素材库建设探讨

针对医学院教师制作多媒体课件时大部分时间花费在素材获取上的现状,提出建设校本共享型多媒体素材库的应对策略。分别从素材库建设契机,建库理念,遵循规范,素材获取等几方面进行探讨,最后指出多媒体素材库建设是一项长期复杂的工程,不能一蹴而就。     

宽频带小型对数周期天线的设计

对数周期天线是结构简单,性能优良的超宽频带天线。利用一副对数周期天线可以覆盖整个短波波段,广泛应用于短波通信中。在超短波和微波波段,在解决好其纵向长度后,对数周期天线实际应用也很广泛。通过分析对数周期天线的基本原理,利用矩量法（伽略金）对其分析计算,结合工程实际要求,设计出一副在超短波到微波波段符合一定技术指标的小型化对数周期天线。测试结果表明,该天线在设计频带内、增益高、尺寸小、结构简单、符合工程设计要求。     

A fusion data preprocessing method and its application in complex industrial power consumption prediction

Data-driven prediction methods often encounter problems in industrial applications due to noise, data redundancy, and insufficient labeled data. Preprocessing the data is required to improve prediction accuracy. At present, most data preprocessing methods are independent of each other and the correlation between methods is relatively small, resulting in repeated redundancy and reduced efficiency. To address this problem, this work proposes a fusion data preprocessing method based on a stacked denoising auto-encoders network (SDAE) and generative adversarial networks (GANs). This method reconstructs the noise reduction link in the SDAE network, improves the noise reduction effect of the model and extracts the main features of the data; the GANs is used to avoid overfitting caused by insufficient training data. Finally, the proposed method is applied to power consumption prediction in the metallurgical industry. Experiments show that the proposed method effectively reduces the model calculation time and improves the overall prediction accuracy.     

傅里叶变换与小波变换在信号去噪中的应用

对于高频信号和高频噪声干扰相混叠的信号,采用小波变换去除噪声可以避免用傅里叶变换去噪带来的信号折损。对于噪声频率固定的平稳信号,在对信号进行傅里叶变换后使用滤波器滤除噪声。对高频含噪信号则采用正交小波函数sym4对信号分解到第4层,利用极大极小值原则选择合适的阈值进行软阈值处理,最后利用处理后的小波系数进行重构。实验结果表明,对于高频含噪信号傅里叶去噪会出现严重的信号丢失现象,使用极大极小值原则选择阈值进行小波去噪可以有效地保留高频部分的有用信号。     

复杂铝合金零件镀银工艺改进

介绍了复杂铝合金零件镀银工艺,分析了影响铝合金电镀层质量的因素,通过试验改进了铝合金电镀工艺,在常规二次浸锌工艺中增加了电镀锌,采用浸锌电镀锌联合处理法提高了复杂铝合金零件镀银的结合力。给出了工艺流程及各工序溶液配方和相关参数,并提出了相应的操作要点。介绍了生产过程中易出现的问题及解决办法。利用划格法和热震法检验了镀层的结合强度。测试结果表明:采用新工艺加工的零件达到了结合力的要求。     

甚低频横跨极区传播相位的观测与研究

对甚低频横跨极区传播相位观测数据进行了分析与研究,得出了甚低频跨极区传播相位的日、季变化的主要特征及规律:(1)在夏至前后的一段时间内,传播相位日变化往往呈现"驼峰"形状;(2)昼夜间的传播相位差季节变化明显;(3)传播相位的随机起伏大.     

VLF相位周期滑移现象的观测与分析

分析了新乡观测到的VLF相位周期滑移现象,研究了产生相位周期滑移的原因,揭示了相位周期滑移的实质:VLF传播相位周期滑移是发生在日出或日落过渡期间一种特殊的多模干涉现象,它是由传播路径昼夜分界处的低电离层不连续性所引起的模转换干涉所造成的.