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Enzymatic pretreatment mitigates the dissemination of antibiotic resistance genes via regulating microbial populations and gene expressions during food waste fermentation

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Chinese Chemical Letters 2023年第8期34卷 259-264页

作者： Yang Wu Wanying Hu haining huang Xiong Zheng Lei Dong Yinguang Chen State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

Food waste(FW)has been recognized as essential reservoir for resource recovery via anaerobic fermentation,which could also bring the potential risk of antibiotic resistance genes(ARGs)*** the structural deficiency of FW could be stimulated by enzymatic pretreatment to enhance fermentation efficiency,the influences of enzymatic pretreatment on ARGs fate and microbial metabolic pathways involved in ARGs dissemination have rarely been *** work proved that enzymatic pretreatment could effectively decrease the total abundance of ARGs(reduced by 13.8%-24.5%)during long-term FW *** was found that enzymatic pretreatment significantly reduced the ARGs belonging to the efflux pump,which might be ascribed to its ability to increase membrane ***,enzymatic pretreatment was in favor of reducing microbial diversity and various potential ARGs host(e.g.,Methanosarcina,Clostridium,Prevotella,Parabacteroides).Also,this pretreatment remarkably up-regulated the genetic expressions involved in ABC transporter(e.g.,eryF and mntA)and down-regulated the genetic expressions that participated in DNA replication,two-component systems(e.g.,uphA and cckA),and quorum sensing(e.g.,rpfF and lsrG),thereby decreasing ARGs *** study would expand the insight of the influences of pretreatment method on ARGs fate during FW fermentation,and offer practical guidance on the sustainable management of FW.

关键词： Food waste(FW) Antibiotic resistance genes(ARGs) Enzymatic pretreatment Microbial populations Metabolic pathways

Underwater objects classification method in high-resolution sonar images using deep neural network

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Chinese Journal of Acoustics 2020年第4期39卷 454-467页

作者： ZHU Keqing TIAN Jie huang haining Institute of Acoustics Chinese Acaderny of SciencesBeijing 100190 Key Laborutory of Science and Technology on Adoanced Underuater Acoustic Signal Processing Chinese Academg of SciencesBeijing 100190 University of Chinese Academg of Sciences Beijing 100049

To solve the problem of underwater proud object classification using high-resolution sonar image under small sample situation,a classification method using deep neural network is ***,statistical characteristics of acoustic shadow regions are modeled using Gaussian mixture model and acoustic shadow is *** and simulated dataset are constructed on this ***,simulated dataset is input into convolutional neural network for training,and the feature extraction part is retained,which is used to extract feature of trial *** classification part is reconstructed and trained by feature vectors of trial *** experimental results show that the average classification accuracy of the proposed method is 88.24%,which is 8.67%,20.47%,19.78%,11.59%,9.01%,11.58% higher than that of other six methods *** verifies that the proposed method achieves better performance on underwater proud object classification *** learning curve converges to 96.25%,which is 5.14% higher than validation curve,indicating that the over-fitting problem is alleviated to some *** convolutional neural network is applied in a fusion classifier,which also combines output of logistic classifier,support vector machine,and finally obtains a fusion *** classification accuracy is up to 93.33%,indicating that fusion classifier improves robustness and classification performance of algorithm *** proposed method combines deep learning and transfer learning,which not only utilizes powerful image classification ability of convolutional neural network,but also avoids serious over-fitting problem caused by limited dataset.

关键词： neural network classifier

A Plant Immune Receptor Adopts a Two-Step Recognition Mechanism to Enhance Viral Effector Perception

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Molecular Plant 2019年第2期12卷 248-262页

作者： Jia Li haining huang Min Zhu Shen huang Wenhua Zhang Savithramma P. Dinesh-Kumar Xiaorong Tao Department of Plant Pathology Nanjing Agricultural University Nanjing 210095 P. R. China College of Life Science Nanjing Agricultural University Nanjing 210095 P. R. China Department of Plant Biology and The Genome Center College of Biological Sciences University of California Davis CA USA

Plant intracellular nucleotide binding leucine-rich repeat (NLR) immune receptors play critical roles in pathoge n surveillance. Most plant NLRs characterized so far were found to use a single domain/sensor to recognize pathogen effectors. Here we report that the Sw-5b NLR immune receptor uses two distinct domains to detect the viral movement protein NSm encoded by tospovirus. In addition to its leucine-rich repeat (LRR) domain that has been previously reported, the N-terminal Solanaceae domain (SD) of Sw- 5b also interacts with NSm and a conserved 21-amino-acid region of NSm (NSm^21). The specific interaction between Sw-5b SD and NSm is required for releasing the inhibitory effect of coiled-coil domain on the NBARC- LRR region. Furthermore, we found that the binding of NSm affects the nucleotide binding activity of the NB-ARC-LRR in vitro, while Sw-5b NB-ARC-LRR is activated only when NSm and NSm^21 levels are high. Interestingly, Sw-5b SD could significantly enhanee the ability of the NB-ARC-LRR to detect low levels of NSm effector and facilitate its activation and induction of defense response. An Sw-5b SD mutant that is disrupted in NSm recognition failed to enhance the ability of the NB-ARC-LRR to sense low levels of NSm and NSm^21 . Taken together, our results suggest that Sw-5b SD functions as an extra sensor and the NB-ARC-LRR as an activator, and that Sw-5b NLR adopts a two-step recog nition mechanism to enhance viral effector perception.

关键词： plant innate immunity nucleotide binding leucine-rich repeat (NLR) immune receptors Solanaceae domain (SD) pathogen perception two-step recognition defense response

A supervised learning detection method with pre-processing of sparsity-based adaptive line enhancer

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Chinese Journal of Acoustics 2021年第4期40卷 496-510页

作者： JIN Shenglong CHI Cheng LI Yu huang haining Institute of Acoustics Chinese Academy of SciencesBeijing 100190 Key Laboratory of Science and Technology on Advanced Underwater Acoustic Signal Processing Chinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049

For the weak line-spectrum target detection of uniiianned underwater vehicles in the complex environment,a supervised learning detection method witli pre-processing of sparsity-based adaptive line enhancer(ALE)is *** method incorporates al_(p)-nonn sparse penalty into the cost function of ALE,and it also promotes the sparse regularization model to the 0

关键词： sparsity underwater spectrum

A range and depth estimation method using the time delay structure of bottom reflection in deep sea bottom bounce area

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Chinese Journal of Acoustics 2024年第3期43卷 275-289页

作者： XIE Qichen CHI Cheng ZHANG Bo huang haining Institute of Acoustics Chinese Academy of SciencesBeijing100190 Key Laboratory of Science and Technology on Advanced Underwater Acoustic Signal Processing Chinese Academy of SciencesBeijing100190 University of Chinese Academy of Sciences Beijing100049

When the source-receiver depth relationship is unknown,using the time delay differences for distance and depth estimation may result in a pseudo *** address the issue,a method for directly estimating distance and depth using four time delay differences has been *** method analyzes the relationship of four time delay differences between multipath,by utilizing the difference in the same time delay difference between the pseudo source and the true position,a fuzzy plane is constructed for *** pseudo source can be eliminated without determining the source-receiver depth relationship,which can be achieved on a single *** effectiveness of the method is verified through simulation experiments and error *** sea experiment shows that the method successfully achieves distance and depth estimation of targets ranging from 11.0 km to 16.5 km on two single hydrophones at different depths,with root mean square errors of less than 1.1 km and 54 m,respectively.

关键词： delay estimation method

High-resolution deconvolved beamforming for three-dimensional imaging sonars

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Chinese Journal of Acoustics 2021年第1期40卷 95-110页

作者： WANG Peng CHI Cheng JI Yongqiang huang Yong LIU Jiyuan huang haining Institute of Acoustics Chinese Academy of SciencesBeijing 100190 System Engineering Research Institute of CSSC Beijing 100094

Three-dimensional(3D) imaging sonars based on the conventional beamforming(CBF) suffers from relatively wide main-lobes and high sidelobe *** improve the spatial resolution of 3D imaging sonars,a deconvolved beamforming method is proposed with the iterative Richardson-Lucy algorithm in this *** first,each distance slice can be processed to obtain images by the *** the near field,the Fresnel approximation is ***,the deconvolution technique is applied to the CBF outputs to obtain high-resolution images and suppress the sidelobe *** simulations demonstrate that the proposed algorithm is able to improve the spatial resolution significantly and suppress the sidelobes for 3D imaging ***,the algorithm shows similar robustness with the CBF in the case of wideband and sparse *** priority of the proposed algorithm is also validated by the tank experiment *** presented results indicate that the spatial resolution is increased by one time and the average sidelobe level is reduced by 20 dB.

关键词： resolution algorithm beamforming

A broadband high resolution direction of arrival estimation algorithm based on conditional wavenumber spectral density

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Chinese Journal of Acoustics 2020年第4期39卷 482-497页

作者： LI Xuemin huang haining LI Yu YE Qinghua ZHANG Yangfan Institute of Acoustics Chinese Academy of SciencesBeijing 100190 Key Laboratory of Aduanced Underuwater Information Chinese Academy of SciencesBeijing 100190 University of Chinese Academg of Sciences Beijing 100049

A broadband high resolution direction of arrival(DOA) estimation algorithm named the conditional wavenumber spectral density based(CWSD-based) is proposed in this paper aimed at the problem of large error and high complexity of wideband high resolution *** super-resolution DOA estimation,minimal main-lobe width,ultra-low side-lobe and high precision target resolution performance can be obtained after transforming the array signals to f-k space and using the characteristic of wideband signal power distributed as a line on the conditional wavenumber spectral ***,there are no DOA pre-estimates of the incident signals and the number of sources to be required in this *** simulations indicate that the theoretical resolution of the algorithm is inversely proportional to the highest processing frequency,the estimated mean square error is about 0.1°,and also is robust to array shape distortion and has high computing *** data on the sea indicates that the proposed algorithm,whose performance is superior to CBF and MVDR in the aspects of resolution,weak target detection,non-target direction noise suppression and robustness et al.,can achieve ultra-low sidelobe high resolution DOA in the actual ocean.

关键词： resolution estimation algorithm

Multipath structure of the typical under-ice sound channel in the Arctic:theory and experiment

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Chinese Journal of Acoustics 2019年第1期38卷 21-34页

作者： LIU Chonglei huang haining YIN Li LIU Na WEI Chonghua LI Qihu Institute of Acoustics Chinese Academy of Sciences University of Chinese Academy of Science The First Institute of Oceanography SOA

Considering the typical acoustic environment of the Arctic, this paper proposes a method based on OASES-Bellhop coupled model to rapidly analyze the multipath structure of the under-ice sound channel. Firstly the proposed model refers to ice plate as stratified elastic media with some roughness. Secondly,it uses the perturbation method and Kirchhoff approximation theory to solve the scattering loss due to the sea ice inhomogeneity. Finally, the model predicts the multipath structure of the under-ice channel through Ray theory. The results of the numerical simulation and experiment indicate that the typical Arctic sound channel presents multipath structures due to the sea ice and seabed in the range of 6 km, *** sea ice reflection paths are stable,with a short multipath spread within 14 ms. The seabed reflection paths have relatively weak strength. The proposed OASES-Bellhop coupled model successfully predicts the amplitude and delay of the multipath structure with small error,which indicates the proposed model is able to analyze and predict the multipath structure of the observed acoustic environment in experiment.

关键词： Arctic Multipath structure typical under-ice sound channel

Progresses and advances in Arctic underwater acoustics study

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Chinese Journal of Acoustics 2019年第1期38卷 1-20页

作者： LI Qihu huang haining YIN Li WEI Chonghua LI Yu XUE Shanhua LUAN Jingde Institute of Acoustics Chinese Academy of Sciences University of Chinese Academy of Sciences Naval Research Academy

As a part of underwater acoustics, the study and development of Arctic Acoustics is later than underwater acoustics about several hundred years. After World War II, the study of Arctic Acoustics attracts many interests by some developed countries, especially U.S. and pre-Soviet Union. The research works obviously have some kinds of cold war brand. After the Cold War, with the gradual warming trend of Arctic area, the ocean & acoustic environment in Arctic and its adjacent area have been considerably concerned. The 8 countries of Arctic rim organized exclusive "Arctic Council" in 1996. The white paper of "China Arctic Policy"was published in January 26, 2018, the Chinese government declared that China is a close Arctic country, and is the responsible stakeholder of Arctic interests. The new advances in Arctic research works axe introduced in this paper, including the results of scientific survey and studies about Arctic underwater acoustics of Chinese researchers. It is showed that the Arctic underwater acoustical research area is not only parallely copy the topics what traditional underwater acoustics covered, e.g. environment noise,reverberation,and propagation, but also the topics which is specifically based on the Arctic environment. Some of these research fields cannot be included in the traditional shallow water, deep water acoustics, e.g. the ice-water interface feature, ice covered semi-acoustic channel effect, the communication and navigation of UUV in the condition of under ice, and the adaptation of sonar technique, equipment in the ice-covered environment, etc.

关键词： Progresses advances Arctic underwater acoustics study