Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：本文从《内蒙古法制报》近几年媒体融合发展的思路出发,通过三个方面提出传统法制媒体发展的思路:应对读者跳跃式阅读:整合传播内容;面对读者挑剔型选择:提升内容品质;面临用户多样性需求:加快融合发展。在信息爆炸的时代,读者面对海量信息,编辑应对读者碎片化阅读的习惯,整合具有价值的信息为读者提供最好的信息选择,从而留住读者。在媒体融合的大背景下,媒体面对的读者其实已经转变为客户,传统法制媒体人如何开发市场,为客户提供线上线下服务,顺应互联网传播移动化、社交化、视频化的趋势,和客户建立起互动关系,为客户提供精准的服务,是媒体融合发展的一个选择。媒体转型发展一定会经历阵痛,但这是传统媒体发展的必由之路。
Subjects: Environmental Sciences, Resource Sciences >> Other Disciplines of Environmental Sciences, Resource Sciences submitted time 2021-03-02 Cooperative journals: 《干旱区研究》
Abstract：利用Climatic Research Unit（CRU）1949—2018年最新0.5°× 0.5°网格点月均数据集，主要从EOF分解、小波分析的角度，讨论了泛中亚干旱区近70 a的气候变化特征。结果表明：（1）泛中亚干旱区近70 a降水以1.393mm·(10a)-1的速率呈增加趋势，夏季降水呈减少趋势，其余三季为增加趋势，其中冬季最明显［（0.834 mm·(10a)-1］，同时冬季增温幅度也最大［0.360 ℃·(10a)-1］；（2）降水距平场的EOF分析表明：泛中亚干旱区降水变化趋势呈整体一致性（降水第一模态），西南-东北反向变化特征（降水第二模态），由西向东“-+-”交替分布特征（降水第三模态），3个模态都存在显著的准3 a周期，第一模态还存在5~7 a和准12 a周期，第三模态存在准7 a变化周期；（3）温度距平场的EOF分析表明：温度距平变化表现出整体一致性（温度第一模态），东-西反向变化特征（温度第二模态），第一模态具有显著的准2 a、8~10 a周期，第二模态具有明显的2~4 a、准5 a周期。传统意义上的暖季并没有呈现出比较明显的增温多雨，冷季反而增温幅度更大，降水增加更明显。哈萨克斯坦中部、土库曼斯坦及蒙古国大部干旱化趋势明显，哈萨克斯坦东西两侧、我国新疆北部以及帕米尔高原的部分地方表现出显著的湿润化趋势，我国西北大部地区总体呈弱的湿润化趋势。随着亚洲夏季风的减弱，冷季降水增量高于暖季，这似乎说明亚洲冬季风对泛中亚干旱区降水的影响正在加大。本研究结果旨在加深对泛中亚干旱区气候变化特征的认识，为进一步防灾减灾、合理应对气候变化、坚持可持续发展战略提供科学依据。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-04-19 Cooperative journals: 《计算机应用研究》
Abstract： In the cognitive radio(CR) environment, the problem of insufficient frequency resources gets severe, non-continuous orthogonal frequency division multiplexing (NC-OFDM) can work in the non-continuous spectral environment, this paper proposed cyclic autocorrelation method to deal with the important problem of parameter estimation of NC-OFDM signals. Firstly, analysis the characteristics of cyclostationary of signals. Then according to the cyclic autocorrelation of the NC-OFDM signal, the parameters are estimated with the characteristics of the discrete spectral lines in the cyclic frequency α and the time delay τ cutaway. Finally, this paper simulate the cyclic autocorrelation of the NC-OFDM signals. The simulation results show that the parameters of NC-OFDM signal can be effectively estimated and recognized zero-prefix orthogonal frequency division multiplexing signals(ZP-OFDM) at low signal-to-noise ratio, and the experiments show that close to 90% of the number of subcarriers, can achieve NC-OFDM signals parameter blind estimation.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-04-12 Cooperative journals: 《计算机应用研究》
Abstract： For the problem of general unambiguous acquisition for BOC (binary offset carrier) and its derivative signals is still scarce of analysis, the paper proposed an improved unambiguous acquisition method based on PCF (pseudo correlation function) . Firstly, the paper proposed the concept of step-shape bits vector to obtain a unified expression of cross-correlation function and designed two new step-shape vectors, then synthesized the received signal and referenced signal of corresponding to shape code vector to obtain a single peak. Finally, the paper obtained a generalized unambiguous acquisition method by combined the single peak and autocorrelation functions. The experimental results show that, under the same conditions, its peak energy of the main peak increases by 23% than sub carrier phase cancellation method, the new propose method can deal with all kinds of BOC signals including complex ones with different types or orders and completely eliminate the ambiguity of the autocorrelation function in the synchronization process.
Subjects: Physics >> Condensed Matter: Structural, Mechanical and Thermal Properties submitted time 2017-03-26
Abstract：稀土三价钐离子掺杂不同基质发光材料由于在照明、显示器件、激光等许多领域都具有广泛的应用前景而受到广泛关注并得到深入研究.本文介绍了三价钐离子的能级结构、荧光物质发光性能的影响因素及三价钐离子掺杂不同基质发光材料的发光机理和发光性能,提出了稀土荧光物质在户外领域应用时存在的问题及解决问题的途径,对荧光物质/聚合物复合材料的发展方向进行了展望.认为制备工艺简单、成本低、化学性能稳定、转光效率高的荧光物质/聚合物复合材料兼备聚合物和荧光物质二者的优点,作为一种新型的功能复合材料具有较大的市场前景.
Peer Review Status:
Awaiting Review
Subjects: Physics >> Condensed Matter: Structural, Mechanical and Thermal Properties submitted time 2017-03-24
Abstract：有机－无机杂化膜兼具高分子膜和无机膜的特点,可克服常规分离膜遭遇的渗透性与选择性能间的trade-off问题,是一种有广泛用途的膜材料研究表明,应用正电子湮没寿命谱和正电子湮没符合多普勒展宽能谱等正电子湮没谱学技术能从微观尺度对聚合物-金属有机骨架材料杂化膜PDMS-MIL-101(Cr)的微观结构进行了表征,结果表明,随着MOFs添加量的增大,交联位置处的空位和聚合物基体的自由体积的尺寸都变小,MOFs进入了聚合物的自由体积.杂化膜的正电子湮没符合多普勒展宽能谱显示,MIL-101(Cr)亚纳米粒子的加入使得正电子在聚合物基体PDMS氧原子上的偏向湮没效应减弱,部分正电子与来自MIL-101(Cr)亚纳米粒子中金属原子的电子发生湮没,表明MOFs进入自由体积后与PDMS中的氧原子形成键,遮挡了自由体积周围的部分氧原子 .结果表明,应用正电子湮没谱学技术从微观尺度上表征有机-无机杂化膜的微观结构是非常有效的实验分析方法.
Peer Review Status:Awaiting Review
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