- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Construction of Ecological Security Patterns Based on Ecological Ptotection Redlines in Jiangxi Province, China
摘要： Ecological protection redlines have important strategic significance for maintaining the ecological security patterns and ensuring ecosystem services. It is also an important way to achieve national and regional ecological security. Based on the importance of ecosystem services and ecological sensitivity assessment, and in combination with the existing ecological protection areas, the total area of ecological protection redlines in Jiangxi Province were delineated, accounting for 35.71% of the total area of the province. Then, minimum cumulative resistance model was utilized with redlines as source regions to build the comprehensive ecological security patterns. Finally, spatial distribution of ecological security patterns and a series of components such as ecological corridors, radiation routes and ecological strategy nodes were identified. Three-level ecological function zones were divided. The areas of high-level, moderate-level and low-level ecological lands accounted for 13.84%, 29.59%, and 46.89% of the total area of the province, respectively.
关键词： ecosystem services,ecological security patterns,ecological protection redlines
更新于2025-09-19 17:15:36
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A novel electrochemical method for simultaneous measurement of real-time potentials and photocurrent of various photoelectrochemical systems
摘要： Two-electrode configuration is preferably used in practical application of various photoelectrochemical systems, such as green fuel production and cathodic protection. Photo electrodes are extendedly studied but the effects of the dark electrodes on overall performance of PEC systems are not experimentally figured out. To address this issue, herein, a novel electrochemical method achieving simultaneous measurement of photocurrent and real-time potential of the photo electrode and the dark electrode is proposed. With this method, the actual band positions and band bending of the photo electrode under photocurrent going through can be determined correctly. By investigating photoelectrochemical hydrogen production and cathodic protection with ZnO photo anodes, it is revealed that the amplitude of photocurrent is not solely determined by the number of light generated electrons on the photo electrode but also strongly affected by their consuming rate for electrochemical reactions on the dark electrode. These applications demonstrate the practicality, reliability and universality of the proposed method for comprehensive understanding the reactions of various photoelectrochemical systems and eventually for their better development.
关键词： Semiconducting materials,Artificial solar synthesis,Photoelectrochemical cathodic protection,Photocatalysis,Photoelectrochemical water splitting
更新于2025-09-19 17:15:36
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Synthesis and Characterization of Eu-Doped SrTiO<sub>3</sub> Photocatalytic Materials Using in the Cathodic Protection of 304 Stainless Steel
摘要： In this paper, sample of Eu-doped SrTiO3 was synthesized using hydrothermal method, in which the Eu(NO3)3 and Sr(OH)2 were as the Eu and Sr source. X-ray diffraction (XRD), scanning electron microscope(SEM) were used to characterize the structure and ingredient of the as-prepared samples. The results show that high-purity of SrTiO3 was prepared and structure of SrTiO3 without change with Eu doping. Also, performance of cathodic protection of stainless steel was tested in the photoelectricity cell. Furthermore, the mechanism of the improvement by the rare earth was also detected.
关键词： photocatalytic,cathodic protection,SrTiO3
更新于2025-09-19 17:15:36
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[IEEE 2019 22nd European Microelectronics and Packaging Conference & Exhibition (EMPC) - Pisa, Italy (2019.9.16-2019.9.19)] 2019 22nd European Microelectronics and Packaging Conference & Exhibition (EMPC) - Picosecond Laser Structuring Technology for LTCC - the Improvement of Fine Line Structuring
摘要： Biometrics is commonly used in many automated verification systems offering several advantages over traditional verification methods. Since biometric features are associated with individuals, their leakage will violate individuals’ privacy, which can cause serious and continued problems as the biometric data from a person are irreplaceable. To protect the biometric data containing privacy information, a number of privacy-preserving biometric schemes (PPBSs) have been developed over the last decade, but they have various drawbacks. The aim of this paper is to provide a comprehensive overview of the existing PPBSs and give guidance for future privacy-preserving biometric research. In particular, we explain the functional mechanisms of popular PPBSs and present the state-of-the-art privacy-preserving biometric methods based on these mechanisms. Furthermore, we discuss the drawbacks of the existing PPBSs and point out the challenges and future research directions in PPBSs.
关键词： biometric data,automated verification system,Privacy protection
更新于2025-09-19 17:13:59
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[IEEE 2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) - Bad Neuenahr, Germany (2019.7.1-2019.7.3)] 2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) - Mutually Coupled Dielectric Resonators for On-Chip Antenna Efficiency Enhancement
摘要： The design and real-time hardware-in-the-loop implementation of a hybrid synchrophasors and GOOSE-based automatic synchronization algorithm are presented in this paper. Automatic synchronization is performed by utilizing the synchrophasor measurements from two commercial phasor measurement units (PMUs), while the coordinated control commands to automatic voltage regulator and/or turbine governor control and trip command to the circuit breaker are issued using IEC 61850-8-1 GOOSE messages. The algorithm is deployed inside the PMU using the protection logic equations, and direct communication between the PMUs is established to minimize the communication latencies. In addition, the algorithm is tested using a standard protection relay test-set, and automatic test sequences are executed to validate its performance. It is concluded that the hybrid synchrophasor and GOOSE-based automatic synchronization scheme ensures minimum communication latencies, reduces equipment cost, facilitates interoperability, and performs automatic reconnection adequately.
关键词： synchronization,smart grid,power system protection,real-time control,reconnection,protective relays,synchrophasors,Phasor measurement unit (PMU)
更新于2025-09-19 17:13:59
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Fabrication of pyramid-BiVO4/CdSe composite with controlled surface oxygen vacancies boosting efficient carriersa?? separation for photocathodic protection
摘要： In order to solve the bottleneck problem of weak efficiency of carriers’ separation and transfer in BiVO4 photocatalyst, a novel pyramid-BiVO4 with sufficient oxygen vacancies was successfully synthesized via a low-temperature solvothermal method. By adjusting solution pH and adding SDBS surfactant, the prepared samples could have a variety of controllable morphologies and exposed {001} facets, which were determined by SEM, XRD, and BET methods. XPS O1s peak and ESR signals indicated that pyramid-BiVO4 exhibited higher oxygen vacancies concentration than others. Besides, CdSe quantum dots (QDs) were introduced to construct BiVO4/CdSe heterojunctions composite based photoanode to further promote solar harvesting and carrier separation. The photoelectrochemical experimental results showed that 304 stainless steel (304SS) coupled with 8V-BC photoanode showed an enhanced photocurrent density (608 μA?cm-2) and maximum potential drop (708 mV), which were equivalent to 5.06 times and 2.10 times that of the original BiVO4, respectively. Mechanism study illustrated that the ultra-high performance of the 8V-BC photoanode was attributed to the synergistic effect of enriched oxygen vacancies, exposed {001} facets, enlarged visible light absorption and larger specific surface area.
关键词： oxygen vacancies,photocathodic protection,CdSe,BiVO4,morphology controlled
更新于2025-09-19 17:13:59
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[IEEE 2019 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon) - Vladivostok, Russia (2019.10.1-2019.10.4)] 2019 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon) - Energy Surface of Pit-Patterned Templates for Growth of Space-Arranged Arrays of Quantum Dots a?? Molecular Dynamics Calculations Using High-Efficiency Algorithms
摘要： With its reprogrammability, low design cost, and increasing capacity, field-programmable gate array (FPGA) has become a popular design platform and a target for infringement. Currently available intellectual property (IP) protection solutions are usually limited to protect single FPGA configurations and require permanent secret key storage in the FPGA. In addition, they cannot provide a commercially popular pay-per-device licensing solution. In this paper, we propose a novel IP protection mechanism to restrict IP’s execution only on specific FPGA devices in order to efficiently protect IPs from being cloned, copied, or used with unauthorized integration. This mechanism can also enforce the pay-per-device licensing, which enables the system developers to purchase IPs from the core vendors at the low price based on usage instead of paying the expensive unlimited IP license fees. In our proposed binding-based mechanism, FPGA vendors embed into each enrolled FPGA device with a physical unclonable function (PUF) customized for FPGAs; IP vendors embed augmented finite-state machines (FSM) into the original IPs such that the FSM can be activated by the PUF responses from the FPGA device. We propose protocols to lock and unlock FPGA IPs, demonstrate how PUF can be embedded onto FPGA devices, and analyze the security vulnerabilities of our PUF-FSM binding method. We implement a 128-bit delay-based PUF on 28-nm FPGAs with only 258 RAM-lookup tables and 256 flipflops. The PUF responses are unique and reliable against environment changes. We also synthesize a variety of FSM benchmark circuits. On large benchmarks, the average timing overhead is 0.64% and power overhead in 0.01%.
关键词： hardware metering,intellectual property (IP) protection,finite state machine (FSM),Binding,physical unclonable functions (PUFs),field-programmable gate array (FPGA)
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE International Electron Devices Meeting (IEDM) - San Francisco, CA, USA (2019.12.7-2019.12.11)] 2019 IEEE International Electron Devices Meeting (IEDM) - Self-organized Pairs of Ge Double Quantum Dots with Tunable Sizes and Spacings Enable Room-Temperature Operation of Qubit and Single-Electron Devices
摘要： The design and real-time hardware-in-the-loop implementation of a hybrid synchrophasors and GOOSE-based automatic synchronization algorithm are presented in this paper. Automatic synchronization is performed by utilizing the synchrophasor measurements from two commercial phasor measurement units (PMUs), while the coordinated control commands to automatic voltage regulator and/or turbine governor control and trip command to the circuit breaker are issued using IEC 61850-8-1 GOOSE messages. The algorithm is deployed inside the PMU using the protection logic equations, and direct communication between the PMUs is established to minimize the communication latencies. In addition, the algorithm is tested using a standard protection relay test-set, and automatic test sequences are executed to validate its performance. It is concluded that the hybrid synchrophasor and GOOSE-based automatic synchronization scheme ensures minimum communication latencies, reduces equipment cost, facilitates interoperability, and performs automatic reconnection adequately.
关键词： synchrophasors,synchronization,protective relays,Phasor measurement unit (PMU),smart grid,real-time control,reconnection,power system protection
更新于2025-09-19 17:13:59
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[IEEE 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall) - Xiamen, China (2019.12.17-2019.12.20)] 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall) - Class F-C Power Amplifier with 2nd Harmonic Control at the Input
摘要： Currently, self-healing is one of the most important functions in the smart grid. Meanwhile, fault detection, isolation, and restoration of feeder automation systems dominate the self-healing function in power distribution systems. The steps of the aforementioned function depend on the fault ?ag status of the feeder terminal unit. The conditions for setting this ?ag are judged by the feeder terminal unit overcurrent detecting curve. This paper found an ef?cient approach to calculate this curve via a half-interval method. Versatile application software with the curve plotting capability was also developed and deployed on the web server of the information-management department of Taiwan Power Company and is running successfully.
关键词： piecewise linear approximation,power distribution protection,IEEE standards,fault currents,Computer aided analysis
更新于2025-09-19 17:13:59
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Light-Emitting Diodes (LEDS)
摘要： Since the original ICNIRP Statement was published in 2000, there have been significant improvements in the efficiency and radiance (i.e., optical radiation emission) of LEDs. The most important improvement is the development of ‘white’ LEDs that can be used as general lighting sources, which are more efficient than traditional lighting sources. LEDs emitting in the ultraviolet wavelength region have also become available and have made their way into consumer products. All these changes have led to a rise in concern for the safety of the optical radiation emissions from LEDs. Several in vitro and animal studies have been conducted, which indicate that blue and white LEDs can potentially cause retinal cell damage under high irradiance and lengthy exposure conditions. However, these studies cannot be directly extrapolated to normal exposure conditions for humans, and equivalent effects can also be caused by the optical radiation from other light sources under extreme exposure conditions. Acute damage to the human retina from typical exposure to blue or white LEDs has not been demonstrated. Concern for potential long-term effects, e.g. age-related macular degeneration (AMD), remains based on epidemiological studies indicating a link between high levels of exposure to sunlight and AMD. When evaluating the optical radiation safety of LEDs, it has now been established that published safety standards for lamps, not lasers, should be applied. Thus far, the only clear, acute adverse health effects from LEDs are those due to temporal light modulation (including flicker). Glare can also create visual disturbances when LED light fixtures are not properly designed. Further research is needed on potential health effects from short- and long-term exposure to new and emerging lighting technologies.
关键词： safety standards,radiation, non-ionizing,International Commission on Non Ionizing Radiation Protection,health effects
更新于2025-09-19 17:13:59