中国服务业高质量发展评价与实现路径

服务业高质量发展日益成为经济高质量发展的重要题中之义。在充分梳理服务业高质量发展文献的基础上,将服务业高质量发展解构为结构高质量、效益高质量、规模高质量、品牌高质量4个部分,进而构建了服务业高质量发展的评价指标体系。根据该指标体系对中国服务业高质量发展进行总体、分类、分区测算,发现中国服务业高质量发展呈现总体上升、品牌迟滞、区域失调的态势。研究发现:中国服务业可以通过结构优化、品牌再造、融合发展、协调共进四个路径来实现更优的高质量发展。本文的研究是建构服务业高质量发展指标评价的有益尝试,对服务业高质量发展具有一定的政策启示。

国家高质量教育体系建设的框架结构探析——基于教育政策内容分析的视角

从教育政策内容分析的视角研究国家高质量教育体系建设的框架结构,对于提升国家高质量教育体系建设的政策自觉和实践水平具有重要意义。以定性的教育政策分析方法做这方面的研究,一是建构国家高质量教育体系建设政策内容的分析框架,二是梳理国家颁布的有关高质量教育体系建设的政策文件,三是分析这些政策中明确带有“高质量教育体系建设”的政策内容,以及对其它有关教育改革政策的内容进行综合分析。分析发现,国家高质量教育体系建设的框架结构主要由四大要素组成,即“一个目标”——把学生培养成为德智体美劳全面发展的社会主义建设者和接班人;“两条路径”——学校家庭社会教育的配合和各级各类教育改革形成终身学习的学习型社会;“三大重点”——教育体制改革与教育机制创新、以法制为基础的教育治理体系和治理能力现代化、教育评价制度改革;“四项条件”——教师队伍建设、教育经费投入、教育公平和教育的公益性。建设国家高质量教育体系,要围绕这一框架结构来进行。

高质量桥梁用结构钢的技术开发及应用

南钢通过工艺技术研究、技术力量整合,积极参与桥梁建设中新材料的技术开发,开发一批性能优异的高质量桥梁用结构钢,为中国桥梁的绿色建造做出贡献。

商贸流通业发展与中国产业高质量升级——基于地级市及以上城市的数据

基于2007—2019年288个地级市及以上城市的面板数据,实证考察商贸流通业发展对中国产业结构高质量升级的影响。研究结果表明:第一,商贸流通业集聚和商贸流通业与制造业协同集聚并没发挥促进产业结构高质量升级的作用,而商贸流通业与公共性服务业协同集聚则显著促进了产业结构高质量升级;第二,与中西部地区和小城市相比,东部地区和70个大中城市的商贸流通业集聚与其他产业的协同集聚则显著促进了产业结构高质量升级。由此可知,商贸流通业发展未能有效促进产业结构高质量升级,主要是由经济发展相对滞后地区的抑制效应所致。

外部知识源化对制造业高质量结构转型的门槛机理研究:环境规制视角

创新驱动发展新优势实践下,针对制造业高质量结构转型路径以及动力来源多样化特征,基于中国制造业行业面板数据,系统探究中国各行业制造业高质量结构转型异质性结构,并从环境规制视角构建外部知识源化对制造业高质量结构转型影响机理的面板门槛模型,探讨在不同行业环境规制异质效应下外部知识源化驱动高质量结构转型的非线性影响。研究发现:当前制造业高质量结构转型整体水平较低,行业异质性显著。外部知识源化对于制造业高质量结构转型的作用存在显著的环境规制异质门槛效应:较低的环境规制水平显著推动了外部知识源化对高质量结构转型的作用,随着环境规制水平的提升并突破“临界值”,一定程度上抑制了外部知识源化的高质量结构转型效应,即外部知识源化与高质量结构转型呈先促进后抑制的非线性关系。

China’s 13th and 14th Five-Year Plans:Review and Advice

The 13th Five-year Plan period ushered in a new era of socialism with Chinese characteristics.During this period,China’s economy transitioned from rapid to high-quality growth and weathered the storms of the trade war with the United States and the COVID-19 outbreak.Chinese policymakers embraced new development concepts,and fought to cut overcapacity and excess inventory,deleverage,lower costs,and bolster weak areas under the theme of supply-side structural reforms.In fighting the three tough battles of major risk prevention,targeted poverty reduction and pollution abatement,China has largely resolved myriad structural contradictions and maintained rapid domestic economic growth and stability.Most targets for the 13th Five-year Plan period have been achieved ahead of time or are near completion on time.Institutional sophistication has bolstered high-quality development.

High Frequency Communication Network with Diversity: System Structure and Key Enabling Techniques

High frequency sky wave communication suffers from poor performance including poor link quality and low link success rate. To enhance performance, diversity technology is proposed in the high frequency communication network(HFCN) in this paper.First, we present the benefits and the challenges by introducing diversity technology into the existing HFCN. Secondly, to exploit the benefits fully and overcome the challenges, we propose a system structure suitable for deploying diversity technology in HFCN in large scale,based on the cloud radio access network and software defined network. Moreover, we present a general structure for the real-time updating frequency management system that plays a more important role especially when resource consuming(e.g., frequency) diversity technology is deployed. Thirdly, we investigate the key techniques enabling diversity technology deployment. Finally, we point out the future research directions to help the HFCN with diversity work more efficiently and intelligently.

Formation of Polyethersulfone Film with Regular Microporous Structure by Water Vapor Induced Phase Separation

Polyethersulfone(PES)film with regular microporous structure was formed using dichloromethane as the solvent via water vapor induced phase separation(VIPS).The effects of solution concentration,atmospheric humidity and temperature,as well as molecular weight of PES on the surface morphology of the polymer film were investigated.The surface morphology characterized by SEM showed that the pore size reduced as the solution concentration increased.There was an optimum range of relative humidity for the formation of regular pore structure, which was from 60%to 90%at concentration of 20 g·L-1 and 20°C.With the atmospheric temperature varied from 20 to 30°C,the pore became larger and the space between pores increased.The pore size in the PES film with low molecular weight was smaller than that with high molecular weight.

“工业化+数字化”工程建设企业十四五规划展望——基于新结构经济学视角的建筑业企业转型升级

建筑业是我国国民经济的支柱产业之一,在建筑业为我国经济建设做出积极贡献的同时,仍存在建筑工业化程度低、建造技术落后、建筑工程质量和安全问题时有发生等不足,衍生出的负面影响逐渐暴露,同时新冠疫情对行业发展和社会治理产生了巨大影响。如,发展粗放、环境恶化、资源成本上涨、用工荒、全球供应链体系被打破、健康防疫形势严峻等方面问题。粗放的传统建设方式已经不能满足新时代行业核心业务的需求,建筑行业亟须转变发展方式,以"工业化+数字化"推动建筑业转型升级。

Graphene nanopores toward DNA sequencing： a review of experimental aspects

Nanopores for DNA sequencing have drawn much attention due to their potentials to achieve amplification-free, low-cost, and high-throughput analysis of nuclei acids. The material configuration and fabrication of the nanopore has become one important consideration in the nanopore based DNA sequencing research. Among various materials, the newly emerged graphene has brought more opportunities to the development of sequencing technology because of its unique structures and properties. This review mainly focuses on the experimental aspects of graphene nanopore research including the nanopore fabrication methods and processes. Meanwhile, the challenges in the present graphene nanopore research including hydrophobicity, translocation velocity and noise are also addressed and discussed.