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Science China Technological Sciences OnlineFirst articles

22.04.2024 | Article

Simultaneous detection of flare-associated kink oscillations and extreme-ultraviolet waves

Kink oscillations, which are frequently observed in coronal loops and prominences, are often accompanied by extreme-ultraviolet (EUV) waves. However, much more needs to be explored regarding the causal relationships between kink oscillations and …

verfasst von:
Dong Li, ZhenYong Hou, XianYong Bai, Chuan Li, Matthew Fang, HaiSheng Zhao, JinCheng Wang, ZongJun Ning

22.04.2024 | Article

Memristive oscillator to memristive map, energy characteristic

Most of nonlinear oscillators composed of capacitive and inductive variables can obtain the Hamilton energy by using the Helmholtz theorem when the models are rewritten in equivalent vector forms. The energy functions for biophysical neurons can …

verfasst von:
YiTong Guo, Jun Ma, XiaoFeng Zhang, XiKui Hu

18.04.2024 | Article

Exploiting demand-side heterogeneous flexible resources in risk management of power system frequency

More demand-side flexible resources (DFRs) are participating in the frequency regulation of renewable power systems, whose heterogeneous characteristics have a significant impact on the system frequency response. Consequently, selecting suitable …

verfasst von:
Yu Yao, YongHua Song, ChengJin Ye, Yi Ding, YuMing Zhao

16.04.2024 | News & Views

High spectral efficiency 4-mode 400-km transmission using hybrid probabilistically and geometrically shaped 128QAM

verfasst von:
JunJie Ding, JianJun Yu, Chen Wang, JianYu Long, Min Zhu, Jiao Zhang

16.04.2024 | Review

Emerging direct current triboelectric nanogenerator for high-entropy mechanical energy harvesting

In the era of the Internet of Things (IoT), the provision of sustainable power to distributed, mobile, and low-power-consumption electronic devices is a critical challenge. To overcome this challenge, the triboelectric nanogenerator (TENG), a …

verfasst von:
Jie Chen, RuiLong Guo, HengYu Guo

15.04.2024 | Article

Self-powered wireless environmental monitoring system for in-service bridges by galloping piezoelectric-triboelectric hybridized energy harvester

The energy harvesting technology for the ubiquitous natural wind enables a desirable solution to the issue of distributed sensors in the bridge environmental sensing Internet of Things (IoT) system being restricted to conventional energy supply.

verfasst von:
KangXu Huang, XiaoFei Wang, Li Wang, YuHui Zhou, FuHai Liu, ShiYuan Chang, JunTao Zhu, YuXuan Zhou, He Zhang, JiKui Luo

12.04.2024 | Article

Phase field modeling of ferroelastic variant switching in yttria-stabilized t′zirconia with strain gradient elasticity and interface tension

The 6–8 wt% yttria-stabilized zirconia with a tetragonal structure (t′-YSZ) is extensively employed in thermal barrier coatings. The exceptional fracture toughness of t′-YSZ can be attributed to its distinctive ferroelastic toughening mechanism.

verfasst von:
QianQian Zhou, YueGuang Wei, YiChun Zhou, Li Yang

09.04.2024 | Article

Six million Q factor micro fused silica shell resonator with teeth-like tines released by femtosecond laser-assisted chemical etching

The quality factor (Q factor) is a crucial performance parameter for resonators. In this paper, a novel release method for high-quality micro fused silica shell resonators with teeth-like tines with good surface morphology is proposed. This method …

verfasst von:
Tao Zhao, Yan Shi, Kun Lu, Xiang Xi, XueZhong Wu, DingBang Xiao

24.01.2024 | Article

Examination of two-phase behaviors in porous media during pool boiling

The enhancement of pool boiling heat transfer using porous media has been extensively studied. Although the two-phase distribution and evolution in porous media are crucial to the heat transfer performance, including the critical heat flux (CHF) …

verfasst von:
ZhiHao Zhang, ShuYa Guan, Rui Wu, ChangYing Zhao

19.12.2023 | Article

Highly selective adsorption of rhenium by amyloid-like protein material

Rhenium separation from molybdenum in molybdenite minerals and waste leachate has become an emerging challenge. Addressing this challenge, we prepared a set of protein-based alkylamine/alkylammonium salts complexes as extradants for selective …

verfasst von:
Arif Muhammad, QingMin Yang, Aisha Kanwal, Jian Zhao, Mohsan Nawaz, Hao Ren, Peng Yang

15.12.2023 | Article

Forced boiling of nonazeotropic immiscible mixture in a supercapillary microchannel array for ultra-high heat flux removal with chip junction temperature below 85°C

In this study, a structure-optimized two-phase microchannel heat sink with sintered submicron nucleation sites was developed and tested. The copper-based microchannels had a rectangular cross-section with an equivalent hydraulic diameter of 222 …

verfasst von:
Bo Sun, YuChen Bao, Tong Tian, Ji Li

08.12.2023 | Article

Constructal design of a rectangular parallel phase change microchannel in a three-dimensional electronic device

Based on constructal theory, a rectangular parallel phase change microchannel model in a three-dimensional electronic device (TDED) is established with R134a as the cooling fluid. Based on the minimization of a complex function (CF) composed of …

verfasst von:
JiWen Zhang, HuiJun Feng, LinGen Chen, YanLin Ge

08.12.2023 | Article

Air purifier or fresh air system? A comparison of energy consumption and cost in urban China residential buildings

Chinese urban residential buildings face serious indoor air quality problems. Air purification systems (e.g., air purifiers, fresh air systems) that supply fresh air or purify indoor air are widely used in residential buildings to improve indoor …

verfasst von:
Yong Guo, ZhiWei Sun, Louise B. Weschler, YinPing Zhang

24.11.2023 | Article

Numerical investigation of the photo-thermal characteristics of a direct absorption solar collector using Monte Carlo and finite volume methods

In this study, a novel model of photothermal conversion in a direct absorption solar collector based on the Monte Carlo and finite volume methods was built and validated and the temperatures of the novel and traditional solar collectors were …

verfasst von:
YanLong Zhu, SuNing Li, JianHua Fan, WeiQiang Kong, Yuan Yuan, HePing Tan

07.11.2023 | Article

A stable one-point quadrature rule for three-dimensional numerical manifold method

We present a numerically stable one-point quadrature rule for the stiffness matrix and mass matrix of the three-dimensional numerical manifold method (3D NMM). The rule simplifies the integration over irregularly shaped manifold elements and …

verfasst von:
Ning Zhang, Hong Zheng, Liang Yang, WenAn Wu, Chi Yuan

25.07.2023 | Review

Recent progress in printing flexible electronics: A review

Miniaturization and flexibility are becoming the trend in the development of electronic products. These key features are driving new methods in the manufacturing of such products. Printed electronics technology is a novel additive manufacturing …

verfasst von:
Sheng Bi, BuHan Gao, Xu Han, ZhengRan He, Jacob Metts, ChengMing Jiang, Kyeiwaa Asare-Yeboah

09.10.2018 | Review

A review of lubricating mechanisms from the perspective of tribo-electrophysics and tribo-electrochemistry

Understanding mechanisms of tribo-electrophysics and tribo-electrochemistry is one of the most important fundamental research due to the application of developing scientific technology. The present paper provides a review regarding …

verfasst von:
ZeQi Jiang, JianHua Fang, YingChun Chen, Jiang Wu, Ping Liu, KeCheng Gu, Zhe Zheng, BoShui Chen, Xin Wang, YanHan Feng

15.04.2010

Study on calculation model of road lighting visibility

Visibility is an evaluation index for road lighting, which comprehensively influences the vision reliability of drivers and is a key factor for road lighting safety and energy saving. This paper introduces the concept of road lighting visibility and …

verfasst von:
Ji Weng, YingKui Hu, Wen Ying

20.03.2010

Basic study on architectural planning of psychiatric hospital

This paper considers the main problems of the current mental health facilities in China from the standpoint of architects on the background that mental disorder has become a serious threat to human health. In order to effectively learn from the devel…

verfasst von:
Ying Zhou, YaoNan Sun