Analysis on Technical Structure and Competitiveness of ICT Manufacturing Industries

In order to analyze the technical structure and international comparative advantage of the information and communication technology(ICT)manufacturing industry,a complete set of ICT manufacturing product categories has been constructed by matching National Economical Industry Classification(GB/T4754-2017)with Harmonized System(HS)Codes,based on the relevant definitions in International Standard Industrial Classification(ISIC).The proposed definition overcomes inherent defects such as inaccurate scopes,lagging data and rough categories,which are characterized by commonly utilized product-level based classification approaches.Within the given framework,this paper has designed the technology content related indicators from the perspective of production distribution,and divided ICT product categories into high-end,medium-end and lowend manufacturing classifications according to respective global shares.Then,we have calculated international market shares(IMS),revealed comparative advantages(RCA),and market penetration rates(MPR)of ICT manufacturing exports for major economies from 2010 to 2021.Finally,development characterizations of ICT manufacturing industries for China’s Mainland are analyzed,and several practical suggestions are provided.

基于卷积反投影CT重建的一种新型实用滤波函数

在实际的ＣＴ重建中，由于受散射、射束硬化等低频干扰因素的影响，使得重建图像产生“杯状”伪像以及图像模糊降质。针对在ＩＣＴ工程实践中投影数据存在诸如此类的低频污染问题，本文提出了一新型实用滤波函数取代传统的滤波函数，得到了较为满意的重建效果。

ICT并行重建算法设计与实现

分析了三维ICT近似重建FDK快速算法以及算法串行执行与并行执行的复杂度,利用MPI并行编程环境,对原有ICT重建流程进行并行化,在PC集群上实现了并行ICT重建,进行了系统集成。给出了系统应用实现的解决方案与软件集成流程图。实验结果证明串行重建和并行重建结果是一致的,并行重建可以得到比较理想地重建时间结果和比较理想的加速比与效率。