A5015000505- Soil Carbon and Nitrogen Dynamics
- Advanced Photonic Communication Systems
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Soil and Unsaturated Flow
- Soil and Water Nutrient Dynamics
- Crystallography and Radiation Phenomena
- Semiconductor Lasers and Optical Devices
- Speech and Audio Processing
- Speech Recognition and Synthesis
- Particle Accelerators and Free-Electron Lasers
- Phosphorus and nutrient management
- Advanced X-ray Imaging Techniques
- Advanced Optical Sensing Technologies
- Soil and Environmental Studies
- Agriculture, Soil, Plant Science
- Agricultural Productivity and Crop Improvement
- Educational Technology and Pedagogy
- Nitrogen and Sulfur Effects on Brassica
- Forest ecology and management
- Plant nutrient uptake and metabolism
- Advanced Optical Network Technologies
- Educational Challenges and Innovations
- Nuclear materials and radiation effects
China Power Engineering Consulting Group (China)
2024
Hebei University
2024
China Southern Power Grid (China)
2024
Chinese Academy of Sciences
2016-2023
Institute of High Energy Physics
2016-2023
Institute of Applied Ecology
2017-2021
University of Chinese Academy of Sciences
2017-2021
Yangtze River Delta Physics Research Center (China)
2021
State Key Laboratory on Integrated Optoelectronics
2017-2020
Institute of Semiconductors
2017-2019
This paper presents a review and discussion of the directly modulated semiconductor lasers their applications to optical communications microwave photonics. A detailed comprehensive demonstration from development history specific techniques on measurement, analysis, packaging is provided for first time best our knowledge. few typical based are also illustrated, such as fiber communications, free-space Future directions research highlighted.
How soil sulfur (S) transformation processes and S availability respond to nitrogen (N) addition precipitation increment are still not clearly understood in grassland ecosystems. Thus, we examined the inorganic fractions, organic available soil. We also measured concentrations above-ground tissues of six plant species under N water a semi-arid steppe. Nitrogen promoted acidification fractions as demonstrated by dissolution insoluble into soluble adsorbed S, therefore increasing availability....
Abstract. Here we investigated the effects of P compounds (KH2PO4 and Ca(H2PO4)2) with different addition rates 0, 20, 40, 60, 80, 100 kg ha−1 yr−1 NH4NO3 (0 N yr−1) on soil labile inorganic phosphorus (IP) (dicalcium phosphate, Ca2-P), moderate-cycling IP, recalcitrant IP fractions in a calcareous grassland northeastern China. Soil fractions, not readily available to plants but transforming into soil-available quickly, include variscite (Al-P), strengite (Fe-P) octacalcium phosphate...
Abstract. To understand whether base cations and micronutrients in the plant–soil system change with elevation, we investigated patterns of both soils plant tissues along three elevational gradients climate zones China. Base (Ca, Mg, K) (Fe, Mn, Zn) were determined soils, trees, shrubs growing at lower middle elevations as well their upper limits on Balang (subtropical, SW China), Qilian (dry temperate, NW Changbai (wet NE China) mountains. No consistent found for cation micronutrient...
We report a method to significantly improve the accuracy of an optical vector network analyzer (OVNA) with double-sideband (DSB) modulation. The measurement errors DSB-OVNA mainly derive from carrier uncertainty and beating between higher order sidebands. propose three-step accuracy-enhanced algorithm eliminate these perfectly. A theoretical model is built analyze potential as well find way remove them. Excellent improvement OVNA confirmed by proof-of-concept experiment. shows ultrahigh...
A new prism-array lens for high-energy X-ray focusing has been constructed using an array of different prisms obtained from parabolic structures by removal passive parts material leading to a multiple 2π phase variation. Under the thin-lens approximation changes caused this plane wave are exactly same as those without any additional corrections when they have focal length, which will provide good focusing; at time, total transmission and effective aperture both larger than compound kinoform...
Increasing nitrogen (N) deposition results in soil acidification grasslands. Acid buffering capacity of is a critical index evaluating acidification, the response which to N input regulated by precipitation and concentration other limiting elements. To explore responses N, phosphorus (P), water inputs, we conducted 13-year field experiment an old-field grassland calculated acid (ABC) neutralizing (ANC) at reference pH=5.0 (ANCpH5.0) 4.0 (ANCpH4.0), using quadratic curve fitting model. The...
Soil acidification induced by nitrogen (N) deposition has important effects on species diversity and ecosystem function. The potential role of phosphorous (P) limitation these was overlooked observed only after decades atmospheric N deposition. Few studies have addressed the long-term effect P addition soil resulting from Changes in precipitation patterns could also semi-arid regions. To investigate N, P, water acidification, a nine-year experiment conducted steppe north-eastern China, which...
We propose a photonic approach to generating frequency-doubled triangular waveforms using dual-parallel Mach–Zehnder modulator (DPMZM). Most previous modulator-based schemes require additional processing of optical sidebands filters or dispersive element. In our work, components is no longer necessary. The with repetition rate twice the frequency applied microwave signal can be directly generated by properly setting bias and driven DPMZM. Since there processing, proposed structure cost...
Abstract. To understand whether base cations and micronutrients in the plant-soil system change with elevation, we investigated patterns of both soils plant tissues along three elevational gradients different climate zones China. Base Ca, Mg K Fe, Mn Zn were determined soils, trees shrubs growing at lower middle elevations as well their upper limits on Balang (subtropical, SW China), Qilian (dry-temperate, NW China) Changbai (wet-temperate, NE mountains. No consistent found for cation...
In the process of traditional classroom teaching, atmosphere is generally dull, which greatly restricts teaching quality and learning efficiency. As only school-enterprise cooperation major, information security technology application major in Shandong Electric Power College, together with NARI, 360 other companies, makes full use existing resources builds a based on skills competition that goal-oriented guidance, close to job requirements, coexisting. Meanwhile, this paper forms...
Modern speaker recognition system relies on abundant and balanced datasets for classification training. However, diverse defective datasets, such as partially-labelled, small-scale, imbalanced are common in real-world applications. Previous works usually studied specific solutions each scenario from the algorithm perspective. root cause of these problems lies dataset imperfections. To address challenges with a unified solution, we propose Voice Conversion Augmentation (VCA) strategy to...
The human brain has the capability to associate unknown person's voice and face by leveraging their general relationship, referred as ``cross-modal speaker verification''. This task poses significant challenges due complex relationship between modalities. In this paper, we propose a ``Multi-stage Face-voice Association Learning with Keynote Speaker Diarization''~(MFV-KSD) framework. MFV-KSD contains keynote diarization front-end effectively address noisy speech inputs issue. To balance...
Abstract. Here we investigated the effects of P compounds (KH2PO4 and Ca(H2PO4)2) with different addition rates 0, 20, 40, 60, 80 100 kg ha−1 yr−1 NH4NO3 (0 N yr−1) on soil labile (Olsen-P), moderate-cycling recalcitrant inorganic phosphorus (IP) fractions in a calcareous grassland northeastern China. Soil IP, not readily available to plants but transforming into quickly, include variscite (Al-P), strengite (Fe-P), dicalcium phosphate (Ca2-P) octacalcium (Ca8-P); hydroxylapatite (Ca10-P)...
The nuclear resonant scattering (NRS) experiment requires photon-counting detectors with high time resolution, short dead time, large dynamic range, low noise, and detection area. An 8-channel avalanche photodiode (APD) array detector system integrity, flexibility, reliability has been developed to adapt the demands of NRS experiments. mainly consists four key parts: (i) an array-APD sensor, (ii) integrated fast preamplifiers, (iii) time-to-digital converter readout electronics, (iv) a data...