13 September 2022, Volume 40 Issue 17
    

Special to S&T Review
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Exclusive: Piezoelectronics and nanogenerator
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    Science & Technology Review. 2022, 40(17): 0-0.
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    • Special to S&T Review
  • Enlightenment from design and management of the Horizon Europe Programme to China's science and technology programmes
    NAN Fang, SHEN Yunyi, HAN Bingyang, MENG Xiangkui, YANG Yun
    Science & Technology Review. 2022, 40(17): 7-14. https://doi.org/10.3981/j.issn.1000-7857.2022.17.001
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    The EU's 9th Framework Programme, namely ‘Horizon Europe’ programme, has started in 2021. It is so far the world's largest science and technology funding programme. This paper focuses on analyzing the innovation methods and its application adopted by ‘Horizon Europe’. Then suggestions on the application of China's science and technology programmes are raised, including strengthening preliminary research design, carrying out predictive research, strengthening the coherence among different programmes, encouraging the concept of "joint design", and opening up the channels of open access to information, etc.
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  • Challenges and opportunities of coordinated development of industrial chain in the Yangtze River Delta
    MA Zhengyuan, LIU Yingxia, WANG Qiong, GUI Liuming, CHEN Daming, JIANG Hongbo
    Science & Technology Review. 2022, 40(17): 15-23. https://doi.org/10.3981/j.issn.1000-7857.2022.17.002
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    This paper focuses on the opportunities and challenges faced by the coordinated development of the industrial chain in the Yangtze River Delta under the current new development pattern. We combine policy research, international comparative research, and industrial case studies to analyze the new environment and key industries faced by the industrial economy in the Yangtze River Delta. Then we analyze challenges and opportunities of the industrial chain in the Yangtze River Delta from the perspectives of basic coordination model, industrial structure changing trend, and value flow in the industrial chain. Finally, we put forward policy recommendations for optimizing the industrial division among cities in the Yangtze River Delta in order to give full play to the fulcrum role in the international and domestic dual circulation and promote the coordinated improvement of industrial chain in the Yangtze River Delta.
    • Exclusive: Piezoelectronics and nanogenerator
  • Advance of study on surface charge density of triboelectric nanogenerators
    ZHOU Linglin, WANG Jie, WANG Zhonglin
    Science & Technology Review. 2022, 40(17): 24-35. https://doi.org/10.3981/j.issn.1000-7857.2022.17.003
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    As a promising technology to harvest different forms of mechanical energy from environment, triboelectric nanogenerators (TENGs) have great potential application in self-powered sensor, Internet of Things, and large-scale renewable blue energy. For application it is important to further enhance the output power density and efficiency, which depend on the triboelectric charge density quadratically. In this paper, we briefly introduce the approach to improve the charge density and review the progress of achieving ultrahigh triboelectric charge density. In addition, the restricting factors and limitation of triboelectric charge density are investigated by taking Cu-PTFE as the contact surface of TENG as an example, which could provide a research direction for achieving ultra-high charge density of TENG.
  • Triboelectric nanogenerator for weak energy harvesting
    ZHAO Zhizhen, GAN Lanyue, HU Youfan
    Science & Technology Review. 2022, 40(17): 36-45. https://doi.org/10.3981/j.issn.1000-7857.2022.17.004
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    Advanced energy technology has been promoting the development of human society. As a new type of energy collector, triboelectric nanogenerator is based on triboelectrification and electrostatic induction. It is a sustainable, stable and green energy supply. However, in the case of weak energy harvesting, the design of triboelectric nanogenerator should be careful, especially in terms of sensitivity and efficiency. This paper outlines a variety of triboelectric nanogenerator designs for weak energy harvesting, as well as the working mechanism and applications, which in turn presents an outlook for medical equipment, sustainable system and security devices.
  • Research progress on hybrid energy cells
    GONG Xueying, DU Wenqian, ZHENG Li
    Science & Technology Review. 2022, 40(17): 46-62. https://doi.org/10.3981/j.issn.1000-7857.2022.17.005
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    Compared with triboelectric nanogenerators (TENGs) that simply harvest ambient mechanical vibration energy, the novel hybrid energy cells combined with TENGs are able to harvest multiple forms of energy with a wider operating frequency range and better output performance. In recent years, hybrid energy cells have gradually developed towards miniaturization, portability, and intelligence. This article starts from several categories such as the combination of TENG with solar cells, combination of TENG with electromagnetic generator, combination of TENG with piezoelectric nanogenerator, combination of TENG with various types of power generation, and combination of TENG with other energy cells. The research progress of hybrid energy cells in terms of working mode, structure, energy output, and applications are reviewed, and the challenges faced by hybrid energy cells are discussed. The development prospects of hybrid energy cells are prospected and it is believed that further research in the aspects of integration, high power, and long service life is needed for hybrid energy cells.
  • Application and research progress of triboelectric nanogenerator in self driving intelligent transportation system
    JIN Long, ZHANG Lei, ZHANG Binbin, YANG Weiqing
    Science & Technology Review. 2022, 40(17): 63-75. https://doi.org/10.3981/j.issn.1000-7857.2022.17.006
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    Highway and railway as one of the most important means of transportation have made rapid digitalized development but the power supply of sensors has become a bottleneck for further development. In this paper we illustrate that triboelectric nanogenerator (TENG) with dual functions of power supply and high-sensitive sensing plays an important role in self-powered intelligent transportation systems. We also review the application of TENG in intelligent transportation systems in recent years, including vehicle detection, exhaust gas treatment, vibration energy harvesting, wind energy harvesting, etc. Finally, we analyze the challenges for application of TENG in intelligent transportation and prospect the development trend of TENG in materials, information, electronics, machinery, transportation, and other multidisciplinary fields.
  • Preparation and application of stretchable materials
    PAN Xiaojun, BAO Rongrong, PAN Caofeng
    Science & Technology Review. 2022, 40(17): 76-93. https://doi.org/10.3981/j.issn.1000-7857.2022.17.007
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    With the development and progress of science and technology, the demand of stretchable materials in intelligent robot, electronic skin and other field is increasing. The emergence of stretchable materials can solve the problem of rigidity of intelligent devices and enable intelligent devices to achieve complete flexibility and stretchability. In this paper, some novel stretchable materials such as ultra-thin materials, fabrics and biodegradable materials at present are reviewed, and applications of stretchable materials in stretchable electrodes, energy storage devices and transistor sensors are briefly introduced. It is pointed out that there are some problems in the balance between the conductivity and the extensibility of the tensile material, and the poor air impermeability and comfort of the tensile electrode. Finally, opportunities and challenges in the future are discussed.
    • Reviews
  • Research progress on carbonation properties of alkali-activated materials
    Lü Yigang, XIAO Baihao, HAN Weiwei, PENG Hui, QIAO Jie, WANG Cui, LI Xing
    Science & Technology Review. 2022, 40(17): 94-104. https://doi.org/10.3981/j.issn.1000-7857.2022.17.008
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    As a new type of green building material, alkali-activated material has outstanding advantages in many fields, such as recycling of industrial solid wastes and reduction of CO2 emission. In recent years, more and more attention has been paid to durability of this material. Carbonation as a key factor affecting durability also needs further research. From the aspects of carbonation mechanism, carbonation rate, carbonation effect and improvement of carbonation resistance, this paper summarizes the research status of carbonation performance of alkali-activated materials and achievements and difficulties in this field. Based on the existing results, some research suggestions are proposed to provide reference for the development and application of alkaliactivated concrete.
  • Marine radioactivity emission and monitoring after Fukushima Daiichi Accident
    CHEN Can, LI Junfeng, WANG Jianlong
    Science & Technology Review. 2022, 40(17): 105-112. https://doi.org/10.3981/j.issn.1000-7857.2022.17.009
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    Marine radioactivity monitoring is an important scientific basis for the marine nuclear safety. The effluent released to marine and marine monitoring after Japan's Fukushima Daiichi accident were briefly reviewed. The marine radioactivity monitoring work were introduced, including monitoring contents, monitoring methods, monitoring equipment and monitoring data to guide nuclear emergency response. Recommendations on the development of national marine radioactivity detection technology were proposed.
    • Papers
  • A collaborative navigation method of UAV platform based on message interconnection
    LI Song
    Science & Technology Review. 2022, 40(17): 113-119. https://doi.org/10.3981/j.issn.1000-7857.2022.17.010
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    As a new navigation mode of drone swarm, collaborative navigation can make full use of the message interconnection between platforms and fuse all the measurement information for an optimal estimation of the whole system. Aiming at the problem of low estimation accuracy of distributed cooperative navigation algorithm, a three-stage cooperative navigation method is proposed in this paper. Firstly, the absolute navigation output information is used as the initial value of cooperative navigation, then the relative navigation output information is used as the measurement information of cooperative navigation and a cooperative navigation filter is constructed. Finally, the results calculated by each platform are recursively fed back to the absolute navigation of each platform until the global optimal estimation of navigation information is obtained. The simulation results show that the cooperative navigation method based on message interconnection proposed in this paper can effectively estimate the navigation information of each platform. Compared with the traditional navigation and positioning system and cooperative navigation scheme, it has higher anti-interference and stability, and can adapt to different complex environments.
  • Application of digital beamforming anti-jamming system based on adaptive acquisition algorithm
    AN Haoping, ZHANG Wei, LI Jiankai, LIANG Nan
    Science & Technology Review. 2022, 40(17): 120-128. https://doi.org/10.3981/j.issn.1000-7857.2022.17.011
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    This paper presents a brief introduction to anti-jamming technology and the current status of multi-satellite and multi-beam application, and then proposes a new digital multi-beam anti-jamming receiver implementation method. This method uses inertial device data (heading, pitch angle, and roll angle) to determine the single-constrained steering vector and further derives a digital multi-beam improved acquisition algorithm with a space-time adaptive processing structure. Simulation result shows that the improved acquisition algorithm can fully utilize multi-beam data, stabilize carrier phase, and achieve stronger spatial gain and higher spatial resolution.

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