基于节能减排的电池脱钩技术及应用项目研究

工信部发放5G商用牌照后,全国大规模开展5G工程建设。5G基站设备具有功率大、小微型、覆盖小、数量多等特点。随着基站个数的增多,基站设备总耗电量巨大,电费占运营成本很大的比例。当基站处于负载相对较小或者空载时,如果仍然保持在工作状态,将会浪费大量的电能;当基站供电线路出现问题时候,需运维人员到场逐步排查方能处理好。传统的基站用电问题解决费时费力、系统联动性差、及时性差、无法预测、数据不可控,电力问题将成为运营商5G网络投资的巨大压力。将分析目前5G基站建设用电问题,以节能减排、降本增效为目的,基于基站数据分析、大数据技术等手段,结合基站分布情况、潮汐负载等数据特征,提出一套基于时间序列合理有效智能的基站电池脱钩启停管理方案的研究。     

球形纳米银粉的制备与微结构研究

以硝酸银为原料,以对苯二酚C6H4(OH)2作为还原剂,添加链烷醇胺A作分散剂,液相化学还原法制备出分散性良好的球形纳米银粉。用激光粒度分布仪测试银粉的粒度分布与平均粒径,用透射电子显微镜(TEM)分析银粉的形貌、粒径和团聚状态,用多晶X射线衍射仪(XRD)检测粉体的晶相。实验结果表明:制备的纳米银粉为面心立方晶体结构,呈现规则球形,并且具有狭窄的粒度分布,其平均粒径约为100 nm,振实密度约为4.0 g/cm3。     

鱼雷电机-艉轴系统振动与声辐射特性分析

采用结构有限元软件ANSYS和声学边界元软件SYSNOSIE,对鱼雷电机一艉轴系统振动与声学特性数值计算问题进行了研究,建立了带有电机和轴系装置的鱼雷部分舱段的FEM／BEN数学模型。计算了在电机支撑架为刚性支撑和弹性支撑2种情况下,流固耦合模型结构的振动模态以及基于模拟电机激励下的频响分析。获得了鱼雷结构振动响应特征参数。以振动频响分析计算结果作为声学边界条件,比较了2种情况下结构噪声向外辐射的能力。最后考虑了电机空气动力噪声和敷设吸声材料,采用直接边界元法,对鱼雷近场声学特性进行了计算,计算结果表明,用AN- SYS和SYSNOSIE软件能合理地对鱼雷振动及声学特性进行分析,为工程设计提供了有效的工具。     

基于不同场景的县乡OTN网络扩容方案研究

目前OTN网络在县乡层面已得到大量部署和全面应用,但现开通的电路并不能满足未来大带宽的需求,基于此,对县乡层面OTN组网模式和业务需求进行了分析,结合主流厂家的常见设备,提出了适合县乡不同场景的OTN网络扩容解决方案,以期为构建高速、智能、安全且面向未来的本地传送网络的理论创新与实践工作提供借鉴。     

锂离子动力电池充电技术研究

均衡与控制是锂离子动力电池充电系统的2项关键技术，该文详细介绍了均衡与控制在充电系统中所起的作用，指出了其重要性。在均衡方面，提出了一种实用的均衡电路，并对其工作原理进行了分析，该均衡电路已在实际中采用，效果良好；在控制方面，指出了传统PID控制器在锂电池充电中显示出的不足之处，并针对其不足提出了模糊PID参数自整定的控制方法，通过与传统PID在不同充电环境下的对比仿真试验表明，模糊PID参数自整定的控制方法更适合锂离子动力电池充电系统。     

基于Biharmonic插值的海底地形可视化仿真

由于电子海图中只包含海洋环境的矢量数据,并未给出海底地形相关信息。本文利用IS08211类库,提取S-57电子海图原始文件的矢量水深数据,依据这一组水深数据进行Biharmonic曲面样条插值,计算出一组曲面上的网格点处的坐标数据,从而实现对该海区内海底地形的可视化仿真。同时利用插值后的坐标数据,进行等深线绘制仿真,将仿真结果与专业电子海图软件打开同一张海图进行对比以及误差分析,结果表明,使用捅值数据构建地形的正确性,规则分布的插值水深数据可用于自主式水下航行器（AUV）的自主路径规划。     

基于目标空间尺度特征末程识别潜艇和诱饵的方法研究

阐述了互谱定向技术与能量积分定距技术的基本原理,提出了结合这2种技术精确提取末程目标空间尺度回波特征信息的方法。在此基础上,深入分析了悬浮式诱饵、拖曳式诱饵和潜艇的空间尺度特征,并采用获取的鱼雷攻击点源靶、水平尺度靶和空间尺度靶的试验数据进行了仿真验证,结果表明,精确提取目标空间尺度回波特征信息是可以在末程有效对抗声诱饵并识别潜艇的。     

Local phenomenological properties of turbulence in the suspension flow of solid particles-gas system

An adaptive mathematical model was developed to determine the local phenomenological properties of turbulence in two phase solid particles-gas system. Equations for predicting the dependence of the eddy viscosity and mixing length on the dimensionless radial position in the pipe were obtained. The proposed equations have been tested using own experimental measured data as well as data available in literature devoted to Newtonian turbulent system. Distributions of eddy viscosity and mixing length over the cross-section are given. In deriving the set of equations for the calculation of eddy viscosity and mixing length we assumed the non-Newtonian character of the turbulent two phase solid particles-gas flow.     

Catalytic activity of char produced from brown coal for steam-gasification of bitumen oil

There are several kinds of catalyst for tar reduction such as Ni-based catalysts, alkali catalysts, metal catalysts, and char. Char is a nonmetallic material which be generated by the devolatilization of organic materials. In this article, by using an experimental setup we tried to study the effect of char particles as a catalyst on the tar concentration and produced gas from steam gasification of bitumen oil and to introduce effective parameters in the process of syngas generation. With the increase of gasification temperature from 800 to 950°C, the hydrogen increased sharply from 28.4 vol% to 34.9 vol% and 18.5 vol% to 21.3 vol%, while CO decreased from 12.5 vol% to 14.9 vol% and 14.8 vol% to 18.1 vol% for gasification with and without char, respectively. As a result, it was found that the gas produced is not sensitive to the pressure changes.     

Synthesis of hollow spherical WO3 powder by spray solution combustion and its photocatalytic properties

Hollow spherical WO₃ powder was prepared from mixed solution of ammonium metatungstate, glycine and ammonium nitrate by spray solution combustion synthesis (SSCS) method. The effects of fuel ratio, temperature, precursor solution concentration on the structure and morphology of as-prepared powder, and the SSCS mechanism have been discussed in detail. When precursor solution concentration is 0.10 mol/L, in which the fuel ratio is 2, and reaction temperature set to be 800 °C, the spherical WO₃ powder with smooth surface and a median diameter of 24.02 μm can be obtained, which consists of particles with a diameter of about 30 nm, and the specific surface area is 13.5 m²/g. Moreover, the as-synthesized WO₃ powder is applied to degrade RhB solution in visible light to evaluate its catalytic performance by PLS-SXE300/300UV. Only 10 mg powder can degrade 70.1% RhB solution within 2 h.