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Articles 91 - 120 of 148

Full-Text Articles in Science and Technology Policy

Development Opportunities And Technical Challenges Of Industrialization For Hydrogen Production From Bio-Ethanol Reforming, Xue Han, Hong He, Guojun Yue, Hailong Lin, Jinsong Liu, Bin Yu Jan 2023

Development Opportunities And Technical Challenges Of Industrialization For Hydrogen Production From Bio-Ethanol Reforming, Xue Han, Hong He, Guojun Yue, Hailong Lin, Jinsong Liu, Bin Yu

Bulletin of Chinese Academy of Sciences (Chinese Version)

Bio-ethanol reforming for hydrogen production, using renewable raw materials and adopting mature and efficient chemical processes, is an important source of green hydrogen supply to achieve the goals of carbon peaking and carbon neutrality. Bio-ethanol is a widely used substitute for fossil fuels. With the continuous progress of cellulosic ethanol technology in recent years, bio-ethanol will gradually break through the constraints of starch-based raw material supply. Based on the industrialization achievements of hydrogen production and bio-ethanol, bio-ethanol reforming can realize a rapid linkage with the existing hydrogen energy industry. However, the existence of a carbon-carbon signal bond in ethanol poses …


Exploring Additive Manufacturing In A Space Environment - A Capstone Design Project Experience, Zain Zafar Khan, Zachary Alan Sobelman, Sharanabasaweshwara Asundi Jan 2023

Exploring Additive Manufacturing In A Space Environment - A Capstone Design Project Experience, Zain Zafar Khan, Zachary Alan Sobelman, Sharanabasaweshwara Asundi

Mechanical & Aerospace Engineering Faculty Publications

The employment of additive manufacturing in the non-standard environments like space, ships, or submarines has the potential to be an advanced utility not only in the pre-flight production of aerospace components and structures, but also for the onboard manufacturing of components and tools necessary for future space missions. For example, the ability to produce tools and structural components on the International Space Station can provide the space community the opportunity to make repairs and upgrades to the space station without wasting time and resources transporting such materials through additional missions. Additive manufacturing would allow for space missions to use on …


Space Science In Manned Space Flight, Deep Space Exploration And Scientific Satellite Programs, Ji Wu Nov 2022

Space Science In Manned Space Flight, Deep Space Exploration And Scientific Satellite Programs, Ji Wu

Bulletin of Chinese Academy of Sciences (Chinese Version)

In order to implement President Xi's instruction on promoting space science, space technology, and space application all together, national space programs have been developed fast, which are witnessed recently. Space science has become the hot research topic for more and more universities and research institutions. Nevertheless, there are still questions and puzzles about how could space science play its role in manned spaceflight, deep space exploration, and scientific satellites. This paper discusses the role of space science in all three kinds of space programs, starting from the history of space science, and the characteristics of manned space flight, deep space …


Development Status And Enlightenment Of Space-Time Reference For Space Activities, Weigang Xiao, Zhaoxiang Qi Nov 2022

Development Status And Enlightenment Of Space-Time Reference For Space Activities, Weigang Xiao, Zhaoxiang Qi

Bulletin of Chinese Academy of Sciences (Chinese Version)

In this paper, the connotation of space-time reference and its relationship with space activities are described comprehensively. Time system, celestial reference frame, planetary ephemeris and pulsar timing are outlined. The gap between China and abroad development on space-time reference and its causes are analyzed. At the end, some suggestions for future development in China are proposed.


Minimizing Surface Run-Off, Improving Underground Water Recharging, And On-Site Rain Harvesting In The Kathmandu Valley, Ambika P. Adhikari, Keshav Bhattarai Sep 2022

Minimizing Surface Run-Off, Improving Underground Water Recharging, And On-Site Rain Harvesting In The Kathmandu Valley, Ambika P. Adhikari, Keshav Bhattarai

Himalayan Research Papers Archive

Nepal's political institutions and administrative units were thoroughly restructured in 2015 with the promulgation of the new Constitution. Several rural areas were combined to meet the definition of urban threshold criteria to classify rural areas into urban categories. Accordingly, over 3,900 local political and administrative units were amalgamated into 753 units, of which, 293 units are classified as urban. Within these newly defined urban areas, many natural environments have been converted into impervious surfaces such as paved roads, sidewalks, and building roofs. These impervious surfaces have drastically increased the amount of surface run-offs-often termed as "urban floods"--under increasing precipitation caused …


Review On 11 Years Of Implementation Of Strategic Priority Program (Spp) On Space Science And Its Prospect, Ji Wu, Chi Wang, Quanlin Fan Aug 2022

Review On 11 Years Of Implementation Of Strategic Priority Program (Spp) On Space Science And Its Prospect, Ji Wu, Chi Wang, Quanlin Fan

Bulletin of Chinese Academy of Sciences (Chinese Version)

The Strategic Priority Program (SPP) on space science is a series scientific satellites program implemented by Chinese Academy of Science (CAS) since 2011. Since then, it has become the only and systematic space science satellite series of China. The article reviews the major scientific outcomes and technological breakthroughs in its first phase (2011-2016), the ongoing mission developments of its second phase (2017-2024), and the selected mission proposals for future space science program up to 2030. In 2016, President Xi has addressed:"to promote full developments of space science, space technology and space application," where he put space science in the first …


Thoughts On Space Science Development, Yidong Gu Aug 2022

Thoughts On Space Science Development, Yidong Gu

Bulletin of Chinese Academy of Sciences (Chinese Version)

Space science is a large-scale activity by using space vehicles to explore the universe and natural laws and carry out special experiments, which has made great contributions to the development of contemporary science. This paper outlines the major breakthroughs in international space science, analyzes the context and new trends of space science and manned exploration activities, reviews the development achievements of space science in China in the past 20 years, puts forward existing problems and gaps, and emphasizes the strategic position of space science and its importance to China's science and technology, aerospace and the national long-term development. It is …


Prospects Of Global Space Science Breakthroughs And China’S Contributions, Chi Wang Aug 2022

Prospects Of Global Space Science Breakthroughs And China’S Contributions, Chi Wang

Bulletin of Chinese Academy of Sciences (Chinese Version)

Space science is a frontier interdisciplinary subject that probes the macroscopic and microscopic worlds with spacecraft as a platform. Since the 1960s, many Nobel Prize-level discoveries and original achievements have been spawned in related basic science, breaking through the boundaries of human cognition of the nature, and expanding the human knowledge graph continuously. In the 21st century, with a new round of scientific and technological revolution brewing, space science has also entered a new era of revolutionary advancements. Here we review the major progress in global space science in the past ten years, as well as the trend of space …


Connecting The Last Mile To Speed Up Space Science Development Of China—Review And Prospect Of The Funding Practices For Space Science By Nsfc, Zengqian Hou, Yupeng Yao, Guoxuan Dong, Sheng Yu Aug 2022

Connecting The Last Mile To Speed Up Space Science Development Of China—Review And Prospect Of The Funding Practices For Space Science By Nsfc, Zengqian Hou, Yupeng Yao, Guoxuan Dong, Sheng Yu

Bulletin of Chinese Academy of Sciences (Chinese Version)

Strengthening the basic scientific research in an all-round way and achieving more breakthroughs from zero to one as soon as possible are the major strategic needs of building a world leading power in science and technology in the new era. As the main channel funding basic research in China, the National Natural Science Foundation of China (NSFC) has always focused on the basic frontiers and major scientific issues in space science, carried out strategic research on the planning of relevant disciplines, sorted out key scientific questions, defined the priority development direction, and provided continuous and stable funding through major, key, …


On Index System Of Space Science Strength And Its Enlightenment, Quanlin Fan, Tingting Song, Peng Shi, Haiyan Wei, Xiaoli Chen, Xuezhao Wang, Shijie Guo Aug 2022

On Index System Of Space Science Strength And Its Enlightenment, Quanlin Fan, Tingting Song, Peng Shi, Haiyan Wei, Xiaoli Chen, Xuezhao Wang, Shijie Guo

Bulletin of Chinese Academy of Sciences (Chinese Version)

Major achievements of space science and technology are important symbols of a country's scientific and technological level and ability. The basic consensus of the aerospace community is that China's space technology has been well-developed, space applications need to be strengthened, and space science is relatively the less-developed. Thus, it is extremely urgent for China to build a strong country in space science and tackle the "bottleneck". Here we elaborate the internal logic among the strength of S&T, aerospace, and space science, expound the connotation of space science strength, investigate the index system, and suggest the three-tier system scientifically for the …


Critical Infrastructures For Developing Uavs’ Applications And Low-Altitude Public Air-Route Network Planning, Xiaohan Liao, Chenchen Xu, Huping Ye, Xiang Tan, Shifeng Fang, Yaohuan Huang, Jing Lin Jul 2022

Critical Infrastructures For Developing Uavs’ Applications And Low-Altitude Public Air-Route Network Planning, Xiaohan Liao, Chenchen Xu, Huping Ye, Xiang Tan, Shifeng Fang, Yaohuan Huang, Jing Lin

Bulletin of Chinese Academy of Sciences (Chinese Version)

Contemporary unmanned aerial vehicles (UAVs) are characterized by huge numbers, wide applications, frequent activities, and massive end-users. High standards of reliability and robustness of the software and hardware systems on board UAVs become imminent for safe operations. UAVs' operations are largely dependent on new technologies and external high-technology infrastructures. Among them, the low-altitude public air-route network is a key new type of infrastructure to ensure the safe and efficient operation of UAVs. A further research and promotion of the low-altitude "sky road" infrastructures as the core is conducive to the development of the urban air traffic network and the promotion …


Strategic Development Problems And Mechanism Improvement In Engineering Science, Peinan Li, Weimin Bao, Wei Yao Mar 2022

Strategic Development Problems And Mechanism Improvement In Engineering Science, Peinan Li, Weimin Bao, Wei Yao

Bulletin of Chinese Academy of Sciences (Chinese Version)

Modern engineering embodies the characteristics of multi-disciplinary integration and is the engine for the development of basic science and engineering technology. Engineering science comes from engineering and serves engineering. Engineering science and natural science both belong to the category of basic research and are the basis of jointly supporting the development and progress of engineering technology. To this end, this paper reviews the development process of engineering science, and on the basis of fully grasping the and the connotation, development stage and modern characteristics of engineering science, draws on the experience and practices of major countries in the development of …


Discussion Of Materials Science Development Trend Through Climate Change, Manufacturing Update, National Security And Materials Genome Initiative, Weijian Lin, Bowen Zhang, Weihua Wang Mar 2022

Discussion Of Materials Science Development Trend Through Climate Change, Manufacturing Update, National Security And Materials Genome Initiative, Weijian Lin, Bowen Zhang, Weihua Wang

Bulletin of Chinese Academy of Sciences (Chinese Version)

New materials are considered as the foreguide and the base of the revolution of advanced technology. Its development and trend of new materials greatly influences the human life and society development. Nowadays, the risk of climate change is increasing day by day, the pressure of manufacturing update of new technology revolution is bigger than ever, the competition and the friction between countries become more and more intense, and the iteration of advanced materials turns to a rigid demand. In this work, we analyze and predict the development tread of material from the aspects of climate change, manufacturing update, national security, …


Development Strategy Of China’S Advanced Material Industry Cluster, Kun Zeng, Xiaopeng Li, Ziyun Shen, Fan Liao, Jinsong Xiao, Qingli Huang Mar 2022

Development Strategy Of China’S Advanced Material Industry Cluster, Kun Zeng, Xiaopeng Li, Ziyun Shen, Fan Liao, Jinsong Xiao, Qingli Huang

Bulletin of Chinese Academy of Sciences (Chinese Version)

The advanced material industry is a basic and strategic industry of the national economy, as well as the key area of global competition in technology industry. Under the dual-cycle development pattern, propelling the cluster development of advanced material industry has become a key to raise the level of the advanced material industry development. This article described the spatial distribution of the advanced material industry cluster in China, analyzed the characteristics and development stage of the advanced material industrial cluster, and compared the gap between the advanced material industry cluster in China and the world-class advanced manufacturing industry cluster. In addition, …


Development And Thinking Of Silicon Photonics Heterogenous Integration, Zihao Wang, Ting Wang, Jianjun Zhang Mar 2022

Development And Thinking Of Silicon Photonics Heterogenous Integration, Zihao Wang, Ting Wang, Jianjun Zhang

Bulletin of Chinese Academy of Sciences (Chinese Version)

Integrated photonics are fast-developing research field for next generation information technology. Current silicon photonic integrated chips strongly benefit from low-cost and high-density integration properties of existing CMOS technology. But limited by the physical properties of silicon, it is not a perfect material for different types of optoelectronic devices, such as laser sources, modulators, and infrared detectors. Therefore, heterogeneous integration is proposed by combining the advantages of CMOS process and superior opto-electric properties of heterogenous material systems, that can be an essential step towards next generation integrated optoelectronic chips. Here, this paper introduces the rapid progress of integrated photonics nationally and …


Two-Dimensional Materials: From Fundamental To Application, Guangyu Zhang, Geng Long, Shenghuang Lin, Lede Xian, Yan Jiang, Hao Wu, Shuopei Wang, Na Li Mar 2022

Two-Dimensional Materials: From Fundamental To Application, Guangyu Zhang, Geng Long, Shenghuang Lin, Lede Xian, Yan Jiang, Hao Wu, Shuopei Wang, Na Li

Bulletin of Chinese Academy of Sciences (Chinese Version)

The rapid development of the information society puts forward an ever-increasing urgent need for information storage, processing, and transmission capabilities. With the ending of Moore's Law, the semiconductor industry urgently needs to find new solutions. Lowdimensional materials are considered to be a new breakthrough in the semiconductor industry in the post-Moore era, because of the size characteristics of atomic-level thickness, the structural advantage of no dangling bonds on the surface, and the sensitivity to electrical and optical control methods caused by a large specific surface area. Songshan Lake Materials Laboratory has introduced a group of top scientists and established a …


Development Strategies Of New Energy Materials For Carbon Peak And Neutrality—Case Study Of Songshan Lake Materials Laboratory, Ximei Qiu, Yan Wang, Haiming Lyu, Jian Xu, Yida Wu, Xiaowei Ma, Chunyi Zhi, Xiaolong Du, Xuejie Huang Mar 2022

Development Strategies Of New Energy Materials For Carbon Peak And Neutrality—Case Study Of Songshan Lake Materials Laboratory, Ximei Qiu, Yan Wang, Haiming Lyu, Jian Xu, Yida Wu, Xiaowei Ma, Chunyi Zhi, Xiaolong Du, Xuejie Huang

Bulletin of Chinese Academy of Sciences (Chinese Version)

Transformative energy technologies will provide strong strategic support to the realization of peaking carbon dioxide emissions before 2030, and achieving net zero carbon emissions before 2060. Reducing the dependence on fossil fuels by saving energy and reducing emissions from the source is essential to achieve the double-carbon target as soon as possible. Songshan Lake Materials Laboratory is working on key materials to develop solar-battery power systems and electrification of transportation energy to return coal, oil, and natural gas from fuels to materials. This study focuses on introducing the research team of its New Energy Materials and Devices R&D Center with …


Preface To Topic “Build And Strengthen China’S Information Tech-System”, Guojie Li, Ninghui Sun Jan 2022

Preface To Topic “Build And Strengthen China’S Information Tech-System”, Guojie Li, Ninghui Sun

Bulletin of Chinese Academy of Sciences (Chinese Version)

Self-reliance and self-strengthening at high level does not depend on a single technique, but on the formation of an advantageous national tech-system, so called "country-as-a-platform". Information tech-system refers to the whole one that closely connects devices, components, complete machine, system software, middleware, and application software with a series of technical standards and intellectual property rights. We are entering the IT 3.0 era characterized by integration of human-cyber-physical world. The IT 3.0 era will certainly produce a new tech-system different from the IT 1.0 and IT 2.0 eras, which is a rare opportunity for China to build a self-reliance and self-strengthening …


Thoughts On New It Technique System, Ninghui Sun Jan 2022

Thoughts On New It Technique System, Ninghui Sun

Bulletin of Chinese Academy of Sciences (Chinese Version)

The world is entering a new period of information society dominated by digital economy. To adapt to the requirements of the new development stage of China, and to achieve the key technologies development, it is necessary to accelerate the construction of a new selfreliance and self-improvement IT technique system. The article gives some thoughts on the demand, principle, and key method on above issues, and the new paradigm of research at Institute of Computing Technology, Chinese Academy of Sciences.


From Chip Design To Chip Learning, Yunji Chen, Zidong Du, Qi Guo, Wei Li, Yijun Tan Jan 2022

From Chip Design To Chip Learning, Yunji Chen, Zidong Du, Qi Guo, Wei Li, Yijun Tan

Bulletin of Chinese Academy of Sciences (Chinese Version)

Chip is the foundation of the modern information society. As the world is entering a new era of human-cyber-physical ternary computing, with diverse intelligent applications over trillions of devices, chip with specialized architecture will be heavily demanded in both numbers and types. However, chip design is very costly, which usually requires a long design cycle, complicated process, and high professional developers. Hence, there is a large gap between the need of tremendous chips and the high cost of chip design in the new era. This study proposes Chip Learning, a learning-based method to perform the entire chip design, including logic …


Opportunities And Challenges Of Building Cpu Ecosystem With Open-Source Mode, Yungang Bao, Ninghui Sun Jan 2022

Opportunities And Challenges Of Building Cpu Ecosystem With Open-Source Mode, Yungang Bao, Ninghui Sun

Bulletin of Chinese Academy of Sciences (Chinese Version)

RISC-Ⅴ has been obtained huge attentions and extensively invested over the past decade due to its exciting slogan that "Instruction Sets Want to be Free". Based on RISC-Ⅴ, we are able to build a "human community with a shared future" in the CPU chip area, although there are still many challenges. China should explore its capability to make more contributions in building the open-source chip ecosystem.


Ubiquitous Operating System: Toward The Blue Ocean Of Human-Cyber-Physical Ternary Ubiquitous Computing Mei, Hong Mei, Donggang Cao, Tao Xie Jan 2022

Ubiquitous Operating System: Toward The Blue Ocean Of Human-Cyber-Physical Ternary Ubiquitous Computing Mei, Hong Mei, Donggang Cao, Tao Xie

Bulletin of Chinese Academy of Sciences (Chinese Version)

In response to the new patterns and scenarios of future human-cyber-physical ternary ubiquitous computing, a new kind of operating system named Ubiquitous Operating System (UOS) is emerging and under exploration for further development. The human-cyberphysical ternary ubiquitous computing has many new features, such as open and dynamic environment, diverse requirements, and complex application scenarios. New ubiquitous applications pose special demands on ubiquitous sensing and connection, lightweight computing and artificial intelligence, dynamic adaptation, feedback and control, natural human-computer-interaction, etc. To support these new requirements, a software definition mechanism is in need to flexibly control hardware, data resources, platforms, and applications. This …


Thoughts On Innovation Of Future Network Architecture, Yunjie Liu, Tao Huang, Shou Wang Jan 2022

Thoughts On Innovation Of Future Network Architecture, Yunjie Liu, Tao Huang, Shou Wang

Bulletin of Chinese Academy of Sciences (Chinese Version)

Currently, network technology is deeply integrated with the physical world. Traditional network architectures cannot support the differentiated, customizable, and deterministic needs of industrial Internet and other services. Exploring new network architecture and core technology has officially become the strategic commanding heights of the global Internet competition. To this end, the paper reviews the evolution and trends of the network, analyzes how to achieve high-performance, low-cost, intelligent network development strategies for establishing an autonomous and controllable future network. Two conclusions are drawn as follows. (1) Through the exploration of network construction in recent decades, integration, openness, intelligence, customization and integration of …


Information Superbahn: Towards New Type Of Cyberinfrastructure, Zhiwei Xu, Guojie Li, Ninghui Sun Jan 2022

Information Superbahn: Towards New Type Of Cyberinfrastructure, Zhiwei Xu, Guojie Li, Ninghui Sun

Bulletin of Chinese Academy of Sciences (Chinese Version)

The world is entering a new era of human-cyber-physical ternary computing with diverse intelligent applications over trillions of devices. This calls for a new type of cyberinfrastructure characterized by a planet-scale, high-goodput, low-entropy computing network, colloquially named Information Superbahn. This article highlights the vision of Information Superbahn, including fundamental requirements, key scientific problems, and a candidate system architecture. The goal of building the Information Superbahn is to natively support humancyber-physical systems and low-entropy computing modes, to reduce the effects of systems disorder. Compared with existing network computing systems, such as Internet, cloud computing, big data and Internet of Things, Information …


Improving Cyberspace Security Situation From Perspective Of “Talent, Finance And Infrastructure”, Binxing Fang Jan 2022

Improving Cyberspace Security Situation From Perspective Of “Talent, Finance And Infrastructure”, Binxing Fang

Bulletin of Chinese Academy of Sciences (Chinese Version)

Cyberspace security has been an important part in ensuring economic development and supporting the progress of modern science and technology. As more and more applications are relying on information technology (IT), it becomes very important to improve the security situation of cyberspace. How to take effective measures to practically improve the cyberspace security situation has become the core problem disscussed in this paper. This paper addresses it from the perspectives of "talent, finance and infrastructure". First, on the premise of insufficient supply of cyberspace security talents, this paper proposes to establish the ability certification of talents transferred from other IT …


Thinking On New System For Big Data Technology, Xueqi Chegn, Shenghua Liu, Ruqing Zhang Jan 2022

Thinking On New System For Big Data Technology, Xueqi Chegn, Shenghua Liu, Ruqing Zhang

Bulletin of Chinese Academy of Sciences (Chinese Version)

In recent years, there are such significant improvements on the performance and efficiency of big data technology and system. As it is widely applied in various fields, big data has empowered industrial intelligence, and is the key step into the intelligent stage of information society. Therefore, we are facing greater challenges nowadays, such as the paradox of data flooding and high-value data lacking, the complexity and uncertainty of big data analysis, and the difficulty to balance the data on sharing and circulation, and trustworthiness and security. Moreover, these challenges will not only promote the innovation and change of big data …


Integration Of Blockchain Technology Into Automobiles To Prevent And Study The Causes Of Accidents, John Kim Dec 2021

Integration Of Blockchain Technology Into Automobiles To Prevent And Study The Causes Of Accidents, John Kim

Electronic Theses, Projects, and Dissertations

Automobile collisions occur daily. We now live in an information-driven world, one where technology is quickly evolving. Blockchain technology can change the automotive industry, the safety of the motoring public and its surrounding environment by incorporating this vast array of information. It can place safety and efficiency at the forefront to pedestrians, public establishments, and provide public agencies with pertinent information securely and efficiently. Other industries where Blockchain technology has been effective in are as follows: supply chain management, logistics, and banking. This paper reviews some statistical information regarding automobile collisions, Blockchain technology, Smart Contracts, Smart Cities; assesses the feasibility …


Towards Creating Smart Cities In Nepal, Ambika P. Adhikari, Keshav Bhattarai Aug 2021

Towards Creating Smart Cities In Nepal, Ambika P. Adhikari, Keshav Bhattarai

Himalayan Research Papers Archive

Many urban centers in the world are seeking to become smart cities. Nepali city leaders are also aspiring to make their cities smart. A smart city basically has clever improvements made in three sectors of its operations: technological, human, and institutional. Globally, many cities have recently made impressive enhancements in at least one or more of these areas. Nepal’s National Planning Commission (NPC) in 2016 had released a concept paper on smart cities for Nepal, defining smart cities as sustainable, information and technology-based, with high quality services and replicable (NPC 2016). As most Nepali cities still operate with limited infrastructure, …


Hateproofing Your Message: Response And Prevention Strategies For "Hatejacks", Bond Benton, Daniela Peterka-Benton Oct 2020

Hateproofing Your Message: Response And Prevention Strategies For "Hatejacks", Bond Benton, Daniela Peterka-Benton

Department of Justice Studies Faculty Scholarship and Creative Works

No abstract provided.


Tech Policy And Legal Theory Syllabus, Yafit Lev-Aretz, Nizan Packin Aug 2020

Tech Policy And Legal Theory Syllabus, Yafit Lev-Aretz, Nizan Packin

Open Educational Resources

Technology has changed dramatically over the last couple of decades. Currently, virtually all business industries are powered by large quantities of data. The potential as well as actual uses of business data, which oftentimes includes personal user data, raise complex issues of informed consent and data protection. This course will explore many of these complex issues, with the goal of guiding students into thinking about tech policy from a broad ethical perspective as well as preparing students to responsibly conduct themselves in different areas and industries in a world growingly dominated by technology.