新冠肺炎疫情对数字经济消费的影响及对策

2020年春节假期与新型冠状病毒肺炎疫情防控期叠加,线下消费锐减,居民对于数字经济消费的依赖倍增。短期来看,线上文娱产业迎来爆发式增长,出行相关OTA(在线旅游预订商)消费平台面临短暂的消费空窗期,电商平台为化解疫情期间对消费的冲击提供了缓冲空间,线上协同办公、远程诊疗、网络教育等对传统线下模式进行大规模替代。长期来看,经历疫情磨砺的数字经济消费各环节协同和响应能力将得到提升,线上协同模式将更成熟,资源将不断累积,消费者数字经济消费习惯将进一步巩固,利好数字经济消费未来发展。     

新冠肺炎疫情对我国数字经济投资的影响及对策

2020年春节期间,新型冠状病毒感染肺炎疫情迅速向全国蔓延,对经济发展、社会生产带来较大冲击。数字经济投资因其在短期内拉动经济增长效果明显,对国民经济发展发挥着关键作用。短期来看,疫情对数字经济整体投资规模、产业数字化转型投资、民间投资、外商直接投资等会造成一定冲击。长期来看,疫情对数字经济投资的冲击不具有可持续性,一旦疫情得到控制,数字经济投资规模将持续扩张,数字经济新模式新业态、产业数字化转型、数字化治理将成为投资的热点领域。为此,政府应充分发挥财政作用,帮助受疫情影响较大企业渡过难关,长远来看,要加强数字经济投资引导,激活数字经济民间投资,优化数字经济投资环境。     

新冠肺炎疫情对互联网服务业的影响分析

受2020年新冠肺炎疫情影响,短期内,网络出行、在线旅游、餐饮外卖等互联网服务平台面临收入大幅下降、经营风险加剧、企业用工困难等问题。疫情结束后,线上服务行业仍可能受到商户现金流危机、市场预期严重不足等负面影响,部分行业恢复需要较长时间。同时,疫情将加速融合业务线下流量转向线上、融合应用场景创新、传统服务业转型升级。     

新冠肺炎疫情数据的抓取及可视化研究

随着新冠肺炎疫情的日益严重,全国上下皆密切关注疫情的数据变化,随着疫情时间的推移,数据量变大变多,故利用便捷的工具实现美观的可视化尤为重要.借助于Python的标准库和第三方库,可以实现新冠肺炎疫情数据的实时抓取,经过相关的数据处理后,逐步绘制了疫情的各种趋势图和全国地图,由图可挖掘中国疫情发展的整体过程,以及中国政府...     

Annotation of miRNAs in the COVID-19 Novel Coronavirus

The coronavirus disease 2019 (COVID-19) coronavirus is a new strain of coronavirus that had not been previously detected in humans. As its severe pathogenicity is concerned, it is important to study it thoroughly to aid in the discovery of a cure. In this study, the microRNAs (miRNAs) of COVID-19 were annotated to provide a powerful tool for the study of this novel coronavirus. We obtained 16 novel coronavirus genome sequences and the mature sequences of all viruses in the microRNA database (miRbase), and then used the miRNA matures sequences of the virus to perform the Basic Local Alignment Search Tool (BLAST) analysis in the coronavirus genome, extending the matched regions of approximately 20 bp to two segments by 200 bp. Six sequences were obtained after deleting redundant sequences. Then, the hairpin structures of the mature miRNAs were determined using RNAfold. The mature sequence on one hairpin arm was selected into a total of 4 sequences, and finally the relevant miRNA precursor prediction tools were used to verify whether the selected sequences are miRNA precursor sequences of the novel coronavirus. The miRNAs of the novel coronavirus were annotated by our newly developed method, which will lay the foundation for further study of this virus.     

信息化背景下长吉图区域发展和税收政策分析

随着时代的发展和社会的进步,人类步入了信息化时代。在信息化的今天,如何革故鼎新,与时俱进,推动长吉图区域企业经济科学发展？税收作为国家宏观调控的经济杠杆,是促进区域经济快速发展的一项重要的经济政策。     

A new educational pattern in response to new technologies and sustainable development. Enlightening ICT skills for youth employability in the European Union

The so-called fourth revolution is underway and its impact is appreciated in societies and in the way of life of people, particularly due to its effects on the labor market. The disruption generated by the fast changes point out to the immediacy of the needed changes in higher education for responding the new and changing world. The millenarians or digital natives are already used to living with technology, but the technological changes are so fast that if they do not prepare to face them, they will become obsolete soon. Hence the importance of continuous training and the need for institutions and companies to promote training courses for their employees. The higher education institutions have a key role on the promotion of knowledge and on the innovation, but this new scenario is an unexpected challenge that is difficult to face. Incorporating teaching of information and communications technology in universities within the curriculum, as a cross-training topic, is a difficult but necessary challenge for preparing students for success in labor market. In this paper, the importance of training in ICTs to get a job is raised. An empirical study with EUROSTAT data is carried out and is limited to young people between 16 and 24?years old. Structural Equation Modelling is the applied method. The results indicate that informal ICTs training favors employment and training in computer management. The conclusions point to the need to providing channels of self-training or informal personal training to fit the needs and temporal and spatial availability of each.     

适合大规模网络的一种新型智能网管模型及性能分析

提出了一种适合大规模网络的新型智能网管模型——MADINM(multi-agent based distributed intelligent network management)模型。该模型采用基于域的管理策略,在管理功能的实现上集移动agent和智能agent的优点于一身,既能够对网络管理提供更多的智能支持,又能够解决系统的性能瓶颈问题。理论分析和实验结果均表明,在管理大规模网络时,MADINM模型在性能上优于基于SNMP的网管模型和基于移动agent的网管模型。     

From high hopes to high deficit and back: A historic overview of Europe’s HDTV policy and reflections towards the future of HDTV

This paper describes the standardisation process and introduction timeline of high definition television. The development of the standard is a process that goes back over 40 years, but HDTV is only today slowly finding its place in the home entertainment market. This paper explores why the European standard for analogue HDTV was not widely adopted, what Europe’s relation to HDTV means today, and proposes some general lessons that can be learned for the benefit of the development of HDTV’s successor, Ultra HDTV aka Super Hi-Vision.     

交互电视机顶盒功能与构成剖析

机顶盒是交互式电视中重要的组成部分。目前，世界各大公司都在大力研究和开发机顶盒的新产品。本文阐述了机顶盒在交互式电视中所起的作用，并对机顶盒的结构和工作原理作了详细分析。     

交流特高压同杆并架线路上使用自适应重合闸应用价值分析研究

本文以即将建设的交流特高压工程为例,利用辅助计算工具对同杆并架特高压线路是否采用单相自适应重合闸方案进行不同的故障分析,以期了解其在工程中的应用价值,研究其是否能保证和提高电网的安全稳定运行水平。     

Novel Designed MnS-MoS2 Heterostructure for Fast and Stable Li/Na Storage:Insights into the Advanced Mechanism Attributed to Phase Engineering

Combining 2D MoS₂ with other transition metal sulfide is a promising strategy to elevate its electrochemical performances. Herein, heterostructures constructed using MnS nanoparticles embedded in MoS₂ nanosheets (denoted as MnS-MoS₂) are designed and synthesized as anode materials for lithium/sodium-ion batteries via a facile one-step hydrothermal method. Phase transition and built-in electric field brought by the heterostructure enhance the Li/Na ion intercalation kinetics, elevate the charge transport, and accommodate the volume expansion. The sequential phase transitions from 2H to 3R of MoS₂ and α to γ of MnS are revealed for the first time. As a result, the MnS-MoS₂ electrode delivers outstanding specific capacity (1246.2 mAh g⁻¹ at 1 A g⁻¹), excellent rate, and stable long-term cycling stability (397.2 mAh g⁻¹ maintained after 3000 cycles at 20 A g⁻¹) in Li-ion half-cells. Superior cycling and rate performance are also presented in sodium half-cells and Li/Na full cells, demonstrating a promising practical application of the MnS-MoS₂ electrode. This work is anticipated to afford an in-depth comprehension of the heterostructure contribution in energy storage and illuminate a new perspective to construct binary transition metal sulfide anodes.     

一种均匀圆阵DOA估计算法及衰落信道中的性能仿真

智能天线在第三代移动通信系统中具有广阔的应用前景，它通过空域滤波能够有效的提高移动通信系统的容量，克服共信道干扰等问题。由于第三代移动通信的基站系统普遍采用的是圆形阵列的接收天线，所以本文从实际需要出发，给出了基于ESPRIT的DOA估计和波束赋形算法并根据该算法在衰落信道模型中的性能仿真结果对其进行了详细的分析。