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大数据、人工智能、区块链等新技术层出不穷,对行业创新力、生产力和竞争力产生显著影响,与传统行业的广泛融合,不断催生新产业、新业态、新模式。为衡量这些新技术、新领域整体发展状况和经济贡献,提出以增加值口径对新兴领域产业规模进行测算,将产业规模拆分为核心和融合两部分,基于新兴领域与国民经济行业分类映射关系、权威数据及行业研究数据,采用增加值乘数法与投入产出法相结合或比例推算法,建立了新兴领域产业规模测算方法体系。最后,在人工智能和区块链领域分别进行实践,进一步验证方法的科学性和实用性。 相似文献
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在我国新发展阶段、新发展理念、新发展格局的大框架下,在新一轮科技革命和产业变革深入发展、技术迭代不断加速、科技知识指数增长的背景下,科普工作会越来越在我国新发展阶段、新发展理念、新发展格局的大框架下,在新一轮科技革命和产业变革深入发展、技术迭代不断加速、科技知识指数增长的背景下,科普工作会越来越重要,越来越有施展的天地. 相似文献
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科普作为一种基本公共服务,其投入产出状况关系到科普公共服务均等化的实现。利用DEA 理论,
构建了测评科普服务均等化的“投入- 产出”指标体系,分析了西部区域广西的科普投入产出状况。研究发
现:广西科普投入与产出的诸多指标都低于西部省份平均水平;广西在西部区域的科普服务能力表现出时好
时差的状况,且缺乏一种整体向上发展的趋势;广西科普投入的主要短板在于人员缺乏而非经费不足,广西
科普产出不稳定且科普传媒能力薄弱。为此,建议处于西部区域的广西要注重增加科普人员投入,重视科普
队伍建设;要提升科普传媒能力,促进科普传播效应上台阶;要从整体上稳定科普投入,保证科普产出的整
体向上发展。 相似文献
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本文立足于科普图书创作出版资助项目实施情况的评估工作,初步构建了科普图书评价的指标体系框架,
该指标框架包含了科学性、创作水平、编校出版质量和社会影响4 个一级指标,以及知识性、原创性、通俗性、
编校差错率、发行总量等13 个二级指标。通过对北京地区某科普图书类资助项目近几年资助出版的图书作品进
行实证测验应用,发现该指标框架基本适用。同时针对评估结果存在的问题,提出了提高科普图书创作与出版质
量的对策建议。 相似文献
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By means of exact conformal mapping method we have defined character of dependence of squares amounts of angular part of film
element on angled part dimension. We propose relations, approximating obtained dependence. Calculation results and experimental
researches of large-scale models are represented. 相似文献
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Moshrefzadeh R.S. Radcliffe M.D. Lee T.C. Mohapatra S.K. 《Lightwave Technology, Journal of》1992,10(4):420-425
The temperature dependence of refractive index of polymer films was determined for a number of slab waveguides by a grating coupling method. This dependence was examined as a function of parameters such as molecular weight and glass transition temperature of the polymer. Temperature-induced changes in N TE-N TM , N being the effective index, were studied systematically for different slab waveguide compositions. It is shown that with proper device design and choice of polymeric materials, thermal effects can be reduced 相似文献
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The approaches to prepare a uniform and unified scientific terminology of chemical carcinogenesis are presented. The main definitions proposed (carcinogen, initiation, promotion, mutagen, multistage carcinogenesis, anti-carcinogen, cocarcinogen, carcinogenic risk, etc.) are based on the current state of comprehending mechanisms of the action of chemical carcinogens. 相似文献
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The article describes a model representation of radar probing data in form of a mixture of background and target samples, which is the sum of two random variables with very different parameters. For model development we research the behavior of the central moments of the distribution mix without assuming the distribution law form. An example it is described the detection of the signal at the output of compression system of chirp ionosonde. 相似文献
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为了研究杂质的吸收对光子晶体滤波器设计的影响,引入复折射率并利用特征矩阵法,计算了滤波透射峰的峰值和半峰全宽。滤波透射峰的峰值随杂质的消光系数增加而迅速减小,滤波通道透射峰的半峰全宽随消光系数增加而增大,滤波透射峰的峰值和半峰全宽都随吸收杂质的光学厚度的增加而减小。结果表明,设计光子晶体滤波器时,必须考虑杂质吸收这一重要因素,应选择消光系数小于0.002的掺杂材料,并且杂质的光学厚度应设计在2(λ0/4)左右。 相似文献
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从红外遥控器的分类出发,介绍了“固定编码+学习型”遥控器的结构、部件的选择,以及功能按键的选择、排列,然后从其技术规格及技术测试方面介绍了其选择的一些重点项目,最后,就弥补学习型遥控器的网络遥控器的应用作了简单分析。 相似文献
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解决IP网QoS问题是目前通信领域的研究热点之一.虽然研究已经取得了一定的进展,但人们对于IP 网QoS本身的含义及相关的问题还有着不同的理解.本文将从IP网QoS的定义入手讨论相关的一些问题以及解决IP网QoS问题所做的各种努力. 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1968,56(6):1024-1032
Assuming that visual responses are due to the action of particles on the membrane of the visual cells, the stochastic variability of the response should be a function of the number of particles producing it. Quantitative predictions can be made with the aid of a model proposed in previous articles. It is found that responses produced in visual cells of Limulus by absorption of a single photon have the stochastic properties which would be expected if the response to one photon were brought about by 25 particles. It is concluded from this that the processes leading to visual responses produce multiplication of particles. The effects of temperature and of metabolic poisons suggest that these processes are of chemical nature. 相似文献