ISBN: (纸本)9787576500882

关键词： digital signal processing   analysis of rheographic signals   base impedance compensation   rheogram characteristic points   impedance plethysmography   avanced computing methods  

摘要： In this paper we are introducing innovative solutions applied in impedance plethysmography concerning improvement of the rheagraph characteristics and the efficiency increase of the developing rheograms using computer methods. The described methods have been developed in order to ensure the stability of parameters and to extend the functionality of the rheographic system based on digital signal processing, which applies to the compensation of the base resistance with a digital potentiometer, digital synthesis of quadrature excitation signals and the performance of digital synchronous detection. The emphasis was put on methods for determination of hemodynamic parameters by computer processing of the rheograms. As a result-three methods for respiratory artifacts elimination have been proposed: based on the discrete cosine transform, the discrete wavelet transform and the approximation of the zero line with spline functions. Additionally, computer methods for physiological indicators determination, including those based on wavelet decomposition, were also proposed and described in this paper. The efficiency of various rheogram compression algorithms was tested, evaluated and presented in this work.

关键词： spatio-temporal sensing data   spatio-temporal data processing   spatio-temporal index   polygon range query algorithm   k nearest neighbor query algorithm   query optimization   SpatialHadoop  

摘要： The unprecedented development of Internet of Things (IoT) technology produces humongous amounts of spatio-temporal sensing data with various geometry types. However, processing such datasets is often challenging due to high-dimensional sensor data geometry characteristics, complex anomalistic spatial regions, unique query patterns, and so on. Timely and efficient spatio-temporal querying significantly improves the accuracy and intelligence of processing sensing data. Most existing query algorithms show their lack of supporting spatio-temporal queries and irregular spatial areas. In this paper, we propose two spatio-temporal query optimization algorithms based on SpatialHadoop to improve the efficiency of query spatio-temporal sensing data: (1) spatio-temporal polygon range query (STPRQ), which aims to find all records from a polygonal location in a time interval;(2) spatio-temporal k nearest neighbors query (STkNNQ), which directly searches the query point's k closest neighbors. To optimize the STkNNQ algorithm, we further propose an adaptive iterative range optimization algorithm (AIRO), which can optimize the iterative range of the algorithm according to the query time range and avoid querying irrelevant data partitions. Finally, extensive experiments based on trajectory datasets demonstrate that our proposed query algorithms can significantly improve query performance over baseline algorithms and shorten response time by 81% and 35.6%, respectively.

关键词： 视频系统   数据采集   数据处理  

ISBN: (纸本)9787563564446

摘要： 本书主要研究了面向智慧旅游的视频数据智能处理与挖掘相关技术及应用，以提高旅游景区视频大数据中异常事件检测和识别的精度、鲁棒性、实时性等性能为目的，从而实现对旅游突发事件及时预测和预警，保障旅游安全。本书首先研究了视频大数据的去噪技术，重点研究了基于残差卷积神经网络的视频去噪算法；然后研究了视频大数据的超分辨率重建技术，重点研究了综合深度学习、半耦合字典学习和时空非局部相似性特征的视频超分辨率重建算法；其次研究了旅游景区视频的显著性时空特征提取算法；然后在此基础上研究了旅游景区视频大数据中的异常事件检测和识别技术，重点研究了基于稀疏组合学习的旅游景区视频异常事件检测算法，以及基于时空感知深度网络的旅游景区视频异常事件识别算法。最后设计并实现了面向视频大数据的旅游突发事件监测系统。

关键词： Memristor   Resistive switching   Spike-timing-dependent plasticity   Neuromorphic computing systems   Neural network   Parylene  

摘要： Neuromorphic networks adopt human brain mechanisms and create a promising way to solve various artificial cognitive problems. Memristors, novel circuit design elements, could play the role of hardware synapses in such systems. Memristors based on parylene, safe material for usage within the human body, have already shown their eligibility for neuromorphic applications. The embedding of metal nanoparticles into the parylene layer leads to even better memristive characteristics, but the usage of such memristors in neuromorphic systems is still questionable. In this paper, the characteristics of nanocomposite poly(chloro-p-xylylene) memristors are studied, and the possibility of their training following spike-timing-dependent plasticity rules is demonstrated. Furthermore, a simple spiking neuromorphic network based on such memristors is successfully simulated to solve the task of breast cancer data classification. The results pave the way towards bio-compatible and energy-efficient wearable neuromorphic systems based on parylene memristors.

关键词： Python   数据处理   司法取证   公民信息   统计排重   pandas   正则  

摘要： 目的:为提高取证的效率.降低人工处理的错误概率.提供准确有效的法庭证据,体现司法鉴定的客观性和科学性,研究运用Python开发语言中的数据处理功能对巨量的、栏位格式不一致的表格文件中的身份证号、手机号信息进行自动化统计排重的意义.方法:通过对各类不同格式表格文件的观察,总结共性特征;运用Python数据处理模块设计应用处理流程,并编写代码实现格式化、合并、识别、统计排重;挑选特征表格,测试代码、核对运行结果,并处理异常;提高处理能力、扩大运行规模、优化计算方式.结果:运用传统的Excel工作表处理方式整理巨量表格文件,需要投入大量的人力和时间,并需要突破Excel处理数据量的极限;而运用Python数据处理功能进行自动化处理,大大缩短了时间,降低了人为的错误概率.结论:Python数据处理功能在"侵犯公民信息"案的司法取证中,能高效地、精准地提供"统计排重"后的法庭证据.

关键词： 数据处理   网格化数据   等值线   编程方法  

摘要： 本文分析了栅格定标统一数据轮廓处理的具体步骤,介绍了3种非均匀栅格定标数据处理方法,距离加权最小二乘法(N-P法)、方位角加权点法和加权最小二乘拟合法(M-S法),并给出了程序.

关键词： PARP1   Dual -target inhibitors   Drug resistance   BRCA-de ficient   BRCA wild -type  

摘要： PARP1 plays a crucial role in DNA damage repair, making it an essential target for cancer therapy. PARP1 inhibitors are widely used to treat BRCA-deficient malignancies, and six PARP inhibitors have been approved for clinical use. However, excluding the great clinical success of PARP inhibitors, the concomitant toxicity, drug resistance, and limited scope of application restrict their clinical efficacy. To find solutions to these problems, dual-target inhibitors have shown great potential. In recent years, several studies have linked PAPR1 to other primary cancer targets. Many dual-target inhibitors have been developed using structural fusion, linkage, or library construction methods, overcoming the defects of many single-target inhibitors of PARP1 and achieving great success in clinical cancer therapy. This review summarizes the advance of dual-target PARP1 inhibitors in recent years, focusing on their structural optimization process, structure-activity relationships (SARs), and in vitro or in vivo analysis results.(c) 2021 Elsevier Masson SAS. All rights reserved.

关键词： 低应变   检测方法   注意要点   数据处理  

摘要： 多年以来,低应变(瞬态)测桩方法,由于其检测费用低、操作方便快捷被广泛地应用于基桩完整性检测中.我们通过多年的使用和经验总结发现,低应变(瞬态)测桩方法在现场检测中存在着一些不足之处和有待改进的地方,这就要求使用人员和设备厂家都要不断总结经验以便对其进行改进,力争在主机硬件和操作方法上实现新的突破,使得现场操作更为简单、直观.