测井资料处理软件的开发

本文详细介绍了固体矿产测井中资料的各种实用处理方法、计算模型.其软件的屏幕解释分层功能不仅能对煤层(矿层)进行分层定厚,还可进行快捷方便的全孔岩性解释和复杂煤层(矿层)的结构分析.通过对测井资料的综合处理,可以计算岩石强度参数,煤质参数和岩石沙、泥、水百分含量,实现了计算机的自动成图,成果资料的多样化输出,极大提高了测井资料处理的精度和速度.     

A Survey on Routing Algorithms for Opportunistic Mobile Social Networks

Opportunistic Mobile Social Networks(OMSNs)are kind of Delay Tolerant Networks(DTNs)that leverage characteristics of Mobile Ad Hoc Networks(MANETs)and Social Networks,particularly the social features,to boost performance of routing algorithms.Users in OMSNs communicate to share and disseminate data to meet needs for variety of applications.Such networks have attracted tremendous attention lately due to the data transmission requirement from emerging applications such as IoT and smart city initiatives.Devices carried by human is the carrier of message transmission,so the social features of human can be used to improve the ability of data transmission.In this paper,we conduct a comparative survey on routing algorithms in OMSNs.We first analyze routing algorithms based on three social features.Since node selfishness is not really considered previously in aforementioned routing algorithms,but has significant impact on network performance,we treat node selfishness as another social feature,classify and elaborate routing algorithms based on incentive mechanism.To assess the impact of social features on routing algorithms,we conducted simulation for six routing algorithms and analyzed the simulation result.Finally,we conclude the paper with challenges on design of routing in OMSNs and point out some future research directions.     

电磁兼容技术研究现状与趋势

本文在阐述电磁兼容概念的基础上,对电磁兼容技术的发展、电磁兼容理论研究、电磁兼容标准、测试技术以及发展趋势进行了综述.     

屈家岭管理区图斑赋值方法研究

在土地质量评价前,为了使未采样的空白图斑有一个最接近实际的值,需要对赋值方法进行研究,可以最大程度地保证评价结果的合理性和真实性.选取1 km2赋值研究区,采集样品30件,利用三种不同赋值方法进行赋值评价,研究结果表明按照耕园草图斑10件/km2的采样密度,开展屈家岭管理区1:5万土地质量地球化学调查,利用距离加权反比...     

Hierarchically 1D CdS decorated on 2D perovskite-type La_2Ti_2O_7 nanosheet hybrids with enhanced photocatalytic performance

In this paper,a heterojunction of hierarchically one-dimensional(1 D) cadmium sulfide(CdS) nanowires decorated on the two-dimensional(2 D) La_2 Ti_2 O_7(LTO)has been fabricated by a simple two-step hydrothermal process.The structure,morphology and surface chemical composition of CdS/LTO were studied by a variety of characterizations,in which the X-ray photoelectron spectroscopy(XPS) results showed a strong interaction between CdS and LTO through S-O bonds.The type Ⅱ band alignment of CdS/LTO for favorable electron transfer from CdS to LTO and hole transfer from LTO to CdS was clarified by ultraviolet-visible(UV-Vis) diffuse reflectance spectroscopy and Mott-Schottky(M-S) plot measurements.In the absence of any co-catalyst,H_2 production from water splitting and Rhodamine B(RhB) decomposition in aqueous solution were carried out to evaluate the photocatalytic activities,showing that the photocatalytic performance of CdS/LTO was superior to that of pure LTO and CdS under visible light and simulated sunlight.The optimal CdS content in the CdS/LTO system was determined to be 7.5 wt%.The present results show an effective pathway to design a 1 D/2 D heterojunction photocatalyst in the face of overwhelming problems of energy crisis and environmental pollution.     

复合生物膜气敏传感器及其测试系统研究

为了降低气体传感器功耗、获得高的灵敏度和选择性,利用生物提取液的气敏特性,制作了石英晶体复合生物膜气体传感器。对石英晶体表面进行三种不同的预处理后,表面涂覆数种生物提取液膜,研究了基片预处理方法对传感器敏感度的影响和传感器响应信号的长期稳定性。采用紧凑高效的振荡电路,充分利用数据采集卡资源,构成了灵敏的气体检测系统。新型传感器不需要加热、灵敏度高,响应特性在30天内保持稳定。对8MHz左右的石苎晶体气体传感器所采用的频率测量方法准确度为±5Hz。     

基于声学靶传感器的弹着点测试研究与实现

根据空气动力学基本原理,超音速弹丸在空气中飞行时致使周围的空气发生压缩和膨胀产生激波信号,基于激波特性,建立了脱靶量模型.本文提出通过首遇传感器时间差来求取脱靶量,采用声学传感器对弹丸激波采集,解决了强背景噪声的滤除、传感器振荡信号动态剪除及电磁兼容等难题,提高了N波采集精度和可靠性.系统首次实现了多种弹丸射击时的脱靶距离和脱靶方位的实时测量及射击单位和弹种的自动识别.应用表明,系统战技指标先进.     

Real-time face view correction for front-facing cameras

Face views are particularly important in person-to-person communication.Differenes between the camera location and the face orientation can result in undesirabl...     

纳滤膜在微污染水处理中的应用

纳滤是近十几年来才发展起来的一种新型的介于超滤与反渗透之间的膜水处理技术,由于其具有能截留低分子有机物和多价盐,低压操作和离子选择性等优点,在水处理中被越来越多地应用和研究。本文在介绍纳滤膜的分离机理的基础上综述了纳滤膜技术在微污染水处理方面的应用研究进展,并对其处理过程中的影响因素进行了分析,最后指出了它的应用前景。     

乳化剂硬脂酸柠檬酸单甘酯的合成研究

本文介绍了硬脂酸柠檬酸单甘酯的合成实验,对三种合成路线进行分析、比较,得出最佳合成路线。并从催化剂的种类、反应温度、单甘酯和柠檬酸的摩尔比等对酯化反应的影响对比,确定了较佳的反应条件。同时,对产品的性能进行测定,并进行了乳化能力测试。