Feasibility study of large-scale mass customization 3D printing framework system with a case study on Nanjing Happy Valley East Gate

At present, the development and implementation of digital transformation are the keys to promoting high-quality industry development. The new digital fabrication method of robotic 3D printing is a research area being studied by many to tackle the issue of the declining productivity of traditional construction methods. Although many studies have been done, most of the current 3D printing projects are facing limitations in terms of scale. In order to bridge the gap, this article proposed a mass customization 3D printing framework system for large-scale projects. This article discusses how mass customization is made possible through the joint operation of the FUROBOT software and 3D printing hardware. By taking the east gate of Nanjing Happy Valley Plaza as a case study, the article demonstrates and studies the feasibility of the large-scale mass customization 3D printing framework system.     

复杂难选铁矿石悬浮磁化焙烧-高效分选技术

针对传统铁矿石磁化焙烧技术与装备存在焙烧产品质量差、产能低、能耗高和环境污染严重等问题，创造性提出了一种“预热-蓄热还原-再氧化”悬浮磁化焙烧新工艺。该工艺具有原料适应性广、焙烧产品质量均匀、回收率高、生产能耗低、无污染等特点，适合处理赤铁矿、褐铁矿、菱铁矿及其混合型难选铁矿石。通过多年的潜心基础研究与技术攻关，形成了非均质矿石颗粒悬浮态流动控制、蓄热式高效低温还原、铁物相精准调控与余热同步回收等一系列关键技术，建成了500kg/h复杂难选铁矿石悬浮磁化焙烧-高效分选半工业试验平台。     

Technical advancements and significance of circumlunar return and reentry spacecraft

As one of the vital steps in the 3rd phase of China’s lunar exploration program(CLEP),the circumlunar return and reentry spacecraft,developed by China Academy of Space Technology(CAST),is used to demonstrate the key technologies of hyper-speed return and reentry spacecraft.The system configuration and flight process are presented in this paper,as well as the analysis of mission characteristics,the key technologies and the technical advancement during the RD progress.The significance of circumlunar return and reentry spacecraft is given at the end.     

Deep Integration of Innovation and Entrepreneurship (InE) Education in Chinese University Classrooms

Recently, InE has been regarded as a popular education strategy in Chinese universities. However, problems have been exposed in the adoption of InE, for example, in InE courses and competitions. The purpose of this paper is to provide a possible solution to the problems, which is to organize effective InE courses by integrating InE with Inter-Course-level Problem-Based Learning (ICPBL). A detailed case is demonstrated by an ICPBL elective course design with deep integration of InE in the teaching, learning, and assessments. This paper contributes to a new curriculum design for promoting InE education in practically for Chinese universities.     

数字化管道系统中心线控制点误差分析及修正——以天津LNG输气干线工程为例

数字化管道系统的不断完善为油气管道建设的快速、高水平发展提供了强有力的技术保障,而中心线控制点坐标的完整和准确是数字化管道建设的关键环节。本文以天津LNG输气干线工程为例,对中心线控制点坐标的偏差进行了分析,并提出了修正方法。     

异构网络运营下的基站发展和演变

一．概述 随着人类社会和经济的不断发展，信息的交换和传输已经成为人们生活中与衣食住行一样必不可少的一部分。为了实现此目的，通信技术在近50年内呈现出异常繁荣的景象，这也带来了多种类型通信网络的共存，即异构瑚络（heterogeneous network）。随着如图1所示的3G／WLAN／WiMax等系统在全球的引人以及现有各种r代移动网络的继续运营，这种现象将更为普遍。同时，随着移动通信的快速发展，基站系统作为无线通信网络架构的基本网元，是与用户最靠近的接人模块，在无线通信网络建设中具有非常重要的地位。这主要表现在三个方面：一是它所包含的资产成本在整个网络投资中占有很大的比重，例如有专家预测3G基站建设初期需要投入1000亿元左右，二是它的稳定性直接关系到是否能为用户提供服务及其创造经济效益的多少；三是它的性能表现直接关系到网络服务的质量指标和用户满意度。因此，基站系统的建设和维护是移动运营商工作的重要内容。     

用CMOS工艺实现VSR光电集成接收机的途径

介绍了10Gbit／s速率的甚短距离光传输系统VSR(Very Short Reach)中的接收机。分析了几种有希望用于VSR系统的CMOS工艺兼容的光电探测器。提出用CMOS电路实现VSR光电集成(OEIC)接收机的可能性和实现方法。     

3G室内覆盖：TD-SCDMA多系统融合覆盖方案

多系统兼容覆盖方案设计时，需要充分考虑各系统的频率特性，保证较好的隔离度和插入损耗等指标。同时也要考虑各系统的覆盖特性，使各信号源功率能够最大限受地发挥其覆盖效果。     

Study on Hot Deformation Cracks of Steel D2 Using Procesing Map

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