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  1. Article ; Online: Operation Optimization of Microgrid System Based on Intelligent System Model

    Jian Kang

    Advances in Multimedia, Vol

    2022  Volume 2022

    Abstract: In order to improve the operation optimization effect of the microgrid system, this paper combines the intelligent system model to construct the operation optimization model of the microgrid system. Moreover, this paper conducts a quantitative ... ...

    Abstract In order to improve the operation optimization effect of the microgrid system, this paper combines the intelligent system model to construct the operation optimization model of the microgrid system. Moreover, this paper conducts a quantitative calculation and research on the maximum compensation capacity of the active power filter device and proposes a harmonic power adaptive compensation control strategy in the case of the limited output capacity of the APF device. In addition, this paper adopts the method of extracting the harmonic current command in the synchronous coordinate system based on the band-pass filter composed of SOGI and combines the RDFT algorithm to determine the number of harmonics that can be compensated and the degree of compensation for the harmonic number. Finally, this paper combines simulation experiments and comprehensive evaluation to study and verify that the operation optimization effect of the microgrid system based on the intelligent system model is better and can effectively improve the operation effect of the microgrid system.
    Keywords Electronic computers. Computer science ; QA75.5-76.95
    Subject code 600
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: The future of gene-edited crops in China.

    Zhu, Jian-Kang

    National science review

    2022  Volume 9, Issue 4, Page(s) nwac063

    Language English
    Publishing date 2022-04-01
    Publishing country China
    Document type Editorial
    ZDB-ID 2745465-4
    ISSN 2053-714X ; 2053-714X
    ISSN (online) 2053-714X
    ISSN 2053-714X
    DOI 10.1093/nsr/nwac063
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Effect of Audio–Visual Factors in the Evaluation of Crowd Noise

    Xiaoyin Yang / Jian Kang

    Applied Sciences, Vol 13, Iss 3652, p

    2023  Volume 3652

    Abstract: A crowd can be both a sound source and an absorber. The sound of human voices significantly impacts evaluations of acoustic indicators in urban public spaces. This study aimed to investigate whether human sound impacts evaluations of the overall ... ...

    Abstract A crowd can be both a sound source and an absorber. The sound of human voices significantly impacts evaluations of acoustic indicators in urban public spaces. This study aimed to investigate whether human sound impacts evaluations of the overall environment from both visual and auditory aspects. Primary sound sources and scenes in Harbin, China urban public space served as the research object. Four sets of sound sources and six sets of images were collected in situ in urban public spaces. A subjective evaluation of both visual and auditory aspects was then performed in the laboratory. The results showed that when different types of sounds in urban public spaces are superimposed with human sound, the volume of human sound (45.6 dBA, 55.6 dBA, and 65.6 dBA) significantly affects the acoustic evaluation of the environment. When the superimposed sounds were birds and music, the evaluation of the environment decreased with the human voice increasing in volume. Crowd density and the surrounding visual environment also influence evaluations of the overall sound environment. In this study, the sound preference and acoustic comfort of birdsong and music decreased as the human sound volume increased. The effect of human sound combined with traffic sounds significantly decreased the scores for sound preference and acoustic comfort at higher volumes. The results of the experiments on audio–visual interactions in which people evaluated visual scenes showed that the influence of the visual density of a crowd on assessments of the sound environment is negatively related to the magnitude of the sound of the crowd. When human voices are at 45.6 dBA and 65.6dBA, there is a significant effect on the evaluation of visual scenes for high-density people. When the sound pressure level of human voices is the same, changes in the visual environment are more likely to affect people’s evaluation of the overall sound environment.
    Keywords soundscape ; human sound ; audio–visual interaction ; sound preference ; acoustic comfort ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
    Subject code 780
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Daily rhythm of urban space usage

    Fangye Du / Jiaoe Wang / Liang Mao / Jian Kang

    Humanities & Social Sciences Communications, Vol 11, Iss 1, Pp 1-

    insights from the nexus of urban functions and human mobility

    2024  Volume 10

    Abstract: Abstract As urban density increases, it becomes increasingly common for multiple functions to coexist within the same space, intensifying the complexity of human activity dynamics. However, traditional urban zoning, which relies on the spatial ... ...

    Abstract Abstract As urban density increases, it becomes increasingly common for multiple functions to coexist within the same space, intensifying the complexity of human activity dynamics. However, traditional urban zoning, which relies on the spatial distribution of urban functions and human activities, focuses on the spatial heterogeneity of urban space and fails to capture the temporal dynamics of urban space usage. This paper aims to investigate the daily rhythm of urban space usage and illustrate how the distribution and combination of urban functions affect the daily usage rhythm. Taking Beijing in China as a case, we first identified the daily rhythm of urban space usage with the k-means algorithm and zoned urban space accordingly. Subsequently, multinomial logistic (MNL) models were employed to elucidate how the distribution and combination of urban functions influenced these daily usage patterns. Furthermore, a validation study in typical zones was conducted. The results revealed the existence of a distinct daily rhythm in urban space usage, resulting in the classification of urban space into seven distinct zones: high equilibrium, low equilibrium, diurnal, nocturnal, morning, evening, and noon-type zones. Also, we found that this daily usage rhythm is closely intertwined with the distribution and coexistence of urban functions. Our findings could provide valuable insights for the enhancement of various intricate aspects within urban decision-making processes, including urban planning, transportation management, and more, at a fine-grained scale.
    Keywords History of scholarship and learning. The humanities ; AZ20-999 ; Social Sciences ; H
    Subject code 720
    Language English
    Publishing date 2024-01-01T00:00:00Z
    Publisher Springer Nature
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: The Impact of Financial Development on Agricultural Enterprises in Central China Based on Vector Autoregressive Model

    Jian Kang / Minjuan Zhao

    Security and Communication Networks, Vol

    2022  Volume 2022

    Abstract: China is a large developing country, and there is no doubt that it is a large developing agricultural country. Agriculture has played a vital role in the development of the national economy since ancient times, and it serves as the foundation of China’s ... ...

    Abstract China is a large developing country, and there is no doubt that it is a large developing agricultural country. Agriculture has played a vital role in the development of the national economy since ancient times, and it serves as the foundation of China’s national economy. As agricultural modernization is the fundamental way of agricultural development, its source of funds must come from rural finance. The financial support of rural finance for agricultural modernization is the material basis and prerequisite for ensuring the healthy and rapid development of agricultural modernization. If there is no financial support from rural finance, the process of agricultural modernization will be hindered, and it will not benefit our country’s socialist modernization. Although our country’s rural financial system has been constantly changing and improving, our country’s current financial system still has many shortcomings and defects. In the process of supporting agriculture, rural finance has insufficient capital supply, which has become a “bottleneck” in the development of agricultural modernization, and to a certain extent has severely restricted the development of agricultural modernization. On the basis of existing literature research, this article systematically studies the influence of rural financial market structure on the development of agricultural enterprises in central China. The content includes agricultural total factor productivity and agricultural emission reduction. When analyzing the impact of rural financial market structure on agricultural development, this article also pays attention to its specific impact on agricultural development under the conditions of different types of enterprises.
    Keywords Technology (General) ; T1-995 ; Science (General) ; Q1-390
    Subject code 630
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher Hindawi-Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Performance Evaluation Model of Agricultural Enterprise Technology Innovation Based on GA-BP Neural Network

    Jian Kang / Minjuan Zhao

    Computational Intelligence and Neuroscience, Vol

    2022  Volume 2022

    Abstract: With the continuous development of my country’s economy and society, how to effectively evaluate the technical innovation performance of agricultural enterprises has become the focus of research. This paper firstly processes and analyzes the technical ... ...

    Abstract With the continuous development of my country’s economy and society, how to effectively evaluate the technical innovation performance of agricultural enterprises has become the focus of research. This paper firstly processes and analyzes the technical innovation performance data of agricultural enterprises, and then processes and converts the technical innovation performance data of agricultural enterprises; then, through the analysis of the technical innovation performance data of agricultural enterprises, the key characteristics of the technical innovation performance of agricultural enterprises are excavated. Finally, a performance evaluation model based on agricultural enterprise technology innovation is proposed, and the validity of the model is verified with examples.
    Keywords Computer applications to medicine. Medical informatics ; R858-859.7 ; Neurosciences. Biological psychiatry. Neuropsychiatry ; RC321-571
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher Hindawi Limited
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Indoor Environmental Quality of Residential Elderly Care Facilities in Northeast China

    Jingyi Mu / Jian Kang

    Frontiers in Public Health, Vol

    2022  Volume 10

    Abstract: The indoor environmental quality is based on the indoor environmental performance of buildings, such as air temperature, lighting, and acoustics. These parameters have a specific impact on users' health and experience. This study explores the ... ...

    Abstract The indoor environmental quality is based on the indoor environmental performance of buildings, such as air temperature, lighting, and acoustics. These parameters have a specific impact on users' health and experience. This study explores the relationship between the indoor environment of residential elderly care facilities in cold regions and the sensitivity of the elderly to these facilities with the aim of improving the elderly care environment. This study measured the acoustic, lighting, and thermal environment in four residential elderly care facilities in Northeast China in spring, summer, autumn, and winter through a participant survey. In the residential elderly care facilities surveyed in this study, brightness and illuminance show a nonlinear relationship with lighting evaluation. With an increase in brightness and illuminance, the satisfaction of the lighting environment in different seasons first increases and then decreases. The relative humidity of the different types of rooms varies greatly in spring and less in winter. The average air quality score of the bedroom is higher than that of the activity room. The correlation between odor assessment and overall indoor environmental quality is very poor. The results of the questionnaire survey indicate that the participants were satisfied with the facilities' overall indoor environmental quality. This quality is affected by physical, environmental, and demographic factors. This study provides a reference for the design of other residential elderly care facilities.
    Keywords indoor environmental quality ; care facility ; the elderly ; cold region ; physical environment ; Public aspects of medicine ; RA1-1270
    Subject code 690
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Design of Multi-User Noncoherent Massive SIMO Systems for Scalable URLLC

    Zheng Dong / He Chen / Jian-Kang Zhang

    Entropy, Vol 25, Iss 1325, p

    2023  Volume 1325

    Abstract: This paper develops and optimizes a non-orthogonal and noncoherent multi-user massive single-input multiple-output (SIMO) framework, with the objective of enabling scalable ultra-reliable low-latency communications (sURLLC) in Beyond-5G (B5G)/6G wireless ...

    Abstract This paper develops and optimizes a non-orthogonal and noncoherent multi-user massive single-input multiple-output (SIMO) framework, with the objective of enabling scalable ultra-reliable low-latency communications (sURLLC) in Beyond-5G (B5G)/6G wireless communication systems. In this framework, the huge diversity gain associated with the large-scale antenna array in the massive SIMO system is leveraged to ensure ultra-high reliability. To reduce the overhead and latency induced by the channel estimation process, we advocate for the noncoherent communication technique, which does not need the knowledge of instantaneous channel state information (CSI) but only relies on large-scale fading coefficients for message decoding. To boost the scalability of noncoherent massive SIMO systems, we enable the non-orthogonal channel access of multiple users by devising a new differential modulation scheme to ensure that each transmitted signal matrix can be uniquely determined in the noise-free case and be reliably estimated in noisy cases when the antenna array size is scaled up. The key idea is to make the transmitted signals from multiple geographically separated users be superimposed properly over the air, such that when the sum signal is correctly detected, the signal sent by each individual user can be uniquely determined. To further enhance the average error performance when the array antenna number is large, we propose a max–min Kullback–Leibler (KL) divergence-based design by jointly optimizing the transmitted powers of all users and the sub-constellation assignments among them. The simulation results show that the proposed design significantly outperforms the existing max–min Euclidean distance-based counterpart in terms of error performance. Moreover, our proposed approach also has a better error performance compared to the conventional coherent zero-forcing (ZF) receiver with orthogonal channel training, particularly for cell-edge users.
    Keywords scalable ultra-reliable low-latency communications (URLLC) ; massive SIMO ; noncoherent communication ; non-orthogonal multiple access (NOMA) ; uniquely decomposable constellation group ; Science ; Q ; Astrophysics ; QB460-466 ; Physics ; QC1-999
    Subject code 003
    Language English
    Publishing date 2023-09-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Liquid-liquid phase separation as a major mechanism of plant abiotic stress sensing and responses

    Xin Liu / Jian-Kang Zhu / Chunzhao Zhao

    Stress Biology, Vol 3, Iss 1, Pp 1-

    2023  Volume 11

    Abstract: Abstract Identification of environmental stress sensors is one of the most important research topics in plant abiotic stress research. Traditional strategies to identify stress sensors or early signaling components based on the cell membrane as a primary ...

    Abstract Abstract Identification of environmental stress sensors is one of the most important research topics in plant abiotic stress research. Traditional strategies to identify stress sensors or early signaling components based on the cell membrane as a primary site of sensing and calcium signal as a second messenger have had only limited successes. Therefore, the current theoretical framework underlying stress sensing in plants should be reconsidered and additional mechanisms need to be introduced. Recently, accumulating evidence has emerged to suggest that liquid-liquid phase separation (LLPS) is a major mechanism for environmental stress sensing and response in plants. In this review, we briefly introduce LLPS regarding its concept, compositions, and dynamics, and then summarize recent progress of LLPS research in plants, emphasizing the contribution of LLPS to the sensing of various environmental stresses, such as dehydration, osmotic stress, and low and high temperatures. Finally, we propose strategies to identify key proteins that sense and respond to environmental stimuli on the basis of LLPS, and discuss the research directions of LLPS in plant abiotic stress responses and its potential application in enhancing stress tolerance in crops.
    Keywords Liquid-liquid phase separation ; Biomolecular condensates ; Stress sensors ; Osmotic stress ; High temperature ; Biology (General) ; QH301-705.5
    Subject code 580
    Language English
    Publishing date 2023-12-01T00:00:00Z
    Publisher Springer
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Celebrating the discovery of DNA demethylase.

    Gong, Zhizhong / Zhu, Jian-Kang

    Journal of integrative plant biology

    2022  

    Abstract: Maintaining correct DNA methylation patterns entails the addition of methyl groups by DNA methyltransferases and the active removal of methylation from DNA. This article is protected by copyright. All rights reserved. ...

    Abstract Maintaining correct DNA methylation patterns entails the addition of methyl groups by DNA methyltransferases and the active removal of methylation from DNA. This article is protected by copyright. All rights reserved.
    Language English
    Publishing date 2022-12-07
    Publishing country China (Republic : 1949- )
    Document type Editorial
    ZDB-ID 2130095-1
    ISSN 1744-7909 ; 1672-9072
    ISSN (online) 1744-7909
    ISSN 1672-9072
    DOI 10.1111/jipb.13424
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