Design of composite data acquisition gateway based on 5G network

The integrated data collection system hasn't changed much over the years. Their growth is dominated by digital filtering, and they get a new avionics bus. Time division multiplexing is still used to communicate with the system's data collector. These schemes make use of commands and data buses. While this method works, it has many drawbacks. These shortcomings are overwhelming the strict system architecture, system bandwidth limits, and expertise to only obtain an avionics bus, otherwise system bandwidth and one-way flow of data and control. This lead for high-end video recorders. To quietly monitor our actions and valuable information provides important warnings. However, it is usually completed by a device with this small processing power, which tracks the device, stores the data of the user's data, and is limited in processing. Therefore, it is important to store and process user data in the cloud to track 5 G network activity. This article proposes a simple 5G network gateway solution for custom user monitoring equipment. Collects charge data on Network 5G and Charging-aware multi-mode based routing protocol (CMRP). The CMRP routing mechanism is not yet stable, but the changes depend on the state of the energy charge sensor. This cannot be complemented by energy-efficient sensors and routing protocols that consume less energy.     

高压切割喷嘴冲击磨损的数值分析

以复用矿井含煤颗粒的水对高压切割喷嘴的磨损物理问题为研究对象,采用计算流体力学理论进行数值计算,分析讨论了质量浓度为10、15、20、25、30、40 mg/L条件下速度、剪应力、磨损的分布以及变化关系。计算、分析结果表明:磨损主要发生在出口部位和锥体的后半部份,入口部份和锥体前半部份磨损较小;入口部位、锥体部位磨损量、剪应力随质量浓度增加变化较小;出口部位磨损量在质量浓度为10～20 mg/L减小较快,超过20 mg/L后变化不大;出口部位流体速度、磨损量、剪应力与质量浓度间存在对应关系。煤粒入口速度与混合物速度相同、锥体部位煤粒流体速度低于锥体部位混合物速度(平均值)约79.4%;煤粒出口部位速度随质量浓度的增大而呈现先增加后减小的趋势,速度最大值发生在浓度20 mg/L。     

椭圆管外流动熵产及放热系数的数值分析

以椭圆管加热水流动为研究对象,对椭圆管加热水流动系统进行了二维数值模拟。通过联立求解流体力学基本方程和熵产方程,获得了熵产、放热系数与雷诺数和纵、横向间距的变化关系。数值分析结果表明:熵产主要发生在管壁表面附近,而在系统内部区域熵产较小,可以忽略;熵产随雷诺数的增大而增大,随纵、横向间距增加而减小,熵产与雷诺数、纵、横向间距存在对应关系,纵、横向间距宜在1.75～2.0间;在相同的雷诺数值时,熵产、放热系数沿流动方向呈现单调减小的趋势;不同的雷诺数值,熵产、放热系数不同,单调减小的趋势相同。放热系数随Re的增大而增大,且与雷诺数存在对应关系。纵向总放热系数随纵、横向间距增大而减小,且存在对应关系。     

Personalized Learning Resource Recommendation Method Based on Dynamic Collaborative Filtering

Mobile Networks and Applications - This paper proposes a personalized learning resource recommendation method based on dynamic collaborative filtering algorithm. Pearson correlation coefficient is...     

Structure,surface tension,and rheological behaviors of hydrophobically associative polyacrylamides by self-emulsified microemulsion polymerization

Hydrophobically associating copolymers using acrylamide (AM), acrylic acid (AA), and Styrene (St) as comonomers were successfully prepared by self-emulsified microemulsion polymerization, in which low-molecular-weight AM/AA/St copolymers as surfactant and AM as cosurfactant. The structure and chemical composition of AM/AA/St copolymers were characterized by Fourier transform infrared, nuclear magnetic (NMR), and differential scanning calorimeter. The content of PSt in the copolymers is determined by ¹H nuclear magnetic resonance spectra, suggesting that the self-made polymer surfactant can disperse uniformly the St monomers to improve the copolymerization efficiency. Furthermore, the polymerization mechanism of the self-emulsified microemulsion method is explored preliminarily. During the synthesis of the copolymers, the purified copolymer solution is obtained in one step without using a small molecular emulsifier such as sodium dodecyl sulfate, in order to avoid the complicated post-treatment process of the small molecular emulsifier. The copolymers revealed good hydrophobic association properties and low surface tension.     

Multimedia based risk forecasting model for frequent natural disasters

Multimedia Tools and Applications - Agricultural catastrophe risk assessment is not only a practical problem which needs to be solved for the stable development of China’s agriculture under...     

基于复杂网络的国际镍矿石贸易演变规律研究

镍矿石由于其优良性能,被应用到人们生活中的各个领域,是一种非常重要的有色金属。国际镍矿石贸易国家众多,贸易关系错综复杂。文章利用复杂网络方法对UN comtrade（联合国统计司）发布的2006—2015年国际镍矿石贸易数据中的进出口国家以及贸易额进行建模分析。结果表明：2007年由于美国次贷危机引起全球金融危机的影响,全球经济萧条,各国贸易关系紧密度趋于松散,国际镍矿石贸易出口额大幅度降低,但是有越来越多的镍矿石资源国参与到国际镍矿石贸易当中来,贸易伙伴多样性丰富。在国际镍矿石贸易网络中,中国和美国在镍矿石贸易中的控制能力一直较强。2009年之后,全球经济开始复苏,国际镍矿石市场开始趋向稳定发展。     

Hydrocracking of n-hexadecane via liquid or gaseous water assisted pulsed spark discharge in liquid

In view of the problem that it is difficult to ignite discharge in the insulating liquid medium, the method of water assisted where the spark will occur was proposed. The introduction of water in any form lead to easier breakdown in the insulating liquid medium, and can also avoid carbon deposition caused by spark discharge, so as to achieve the purpose of reducing the discharge voltage. This paper also analyzes the liquid products after discharge, and it is found that the higher heating value of the liquid products was influenced by water state and peak voltage, which increased by 2.25% under the action of spark discharge. In addition, extending processing time may not be a good way to increase higher heating value of liquid products. This method not only solves the difficult problem of plasma generation in liquid medium, but also provides evidence for plasma-chemical reactions in heavy oil cracking and hydrogenation.     

Fate of Organic Pollutants in a Full-Scale Drinking Water Treatment Plant Using O3-BAC

This research investigated the fate of organic pollutants in each unit of a full-scale O₃-BAC (biological activated carbon) drinking water treatment plant with micro-polluted raw water under different temperatures. Total organic matters were largely removed with low DBPs (disinfection by-products) formed. Large molecules were broken into smaller ones by O₃ and middle-sized ones totally removed. Concentration of polysaccharide decreased except under high temperature. Small molecule contaminant species of refractory industrial additives, hydrocarbons, aromatics, herbicides, possible DBPs, etc., were detected. Some species passed through treatment process, some were removed and also new species formed.