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A review on plasma-based CO2 utilization: process considerations in the development of sustainable chemical production 等离子体二氧化碳利用综述:开发可持续化学品生产的工艺考虑因素
Pub Date : 2024-08-31 DOI: 10.1088/2058-6272/ad52c4
Sirui LI, Giulia De FELICE, Simona EICHKORN, Tao SHAO and Fausto GALLUCCI
{"title":"A review on plasma-based CO2 utilization: process considerations in the development of sustainable chemical production","authors":"Sirui LI, Giulia De FELICE, Simona EICHKORN, Tao SHAO and Fausto GALLUCCI","doi":"10.1088/2058-6272/ad52c4","DOIUrl":"https://doi.org/10.1088/2058-6272/ad52c4","url":null,"abstract":"Plasma-based processes, particularly in carbon capture and utilization, hold great potential for addressing environmental challenges and advancing a circular carbon economy. While significant progress has been made in understanding plasma-induced reactions, plasma-catalyst interactions, and reactor development to enhance energy efficiency and conversion, there remains a notable gap in research concerning overall process development. This review emphasizes the critical need for considerations at the process level, including integration and intensification, to facilitate the industrialization of plasma technology for chemical production. Discussions centered on the development of plasma-based processes are made with a primary focus on CO2 conversion, offering insights to guide future work for the transition of the technology from laboratory scale to industrial applications. Identification of current research gaps, especially in upscaling and integrating plasma reactors with other process units, is the key to addressing critical issues. The review further delves into relevant research in process evaluation and assessment, providing methodological insights and highlighting key factors for comprehensive economic and sustainability analyses. Additionally, recent advancements in novel plasma systems are reviewed, presenting unique advantages and innovative concepts that could reshape the future of process development. This review provides essential information for navigating the path forward, ensuring a comprehensive understanding of challenges and opportunities in the development of plasma-based CCU process.","PeriodicalId":20227,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141588463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impurity modes in two-dimensional strongly coupled complex plasma crystals 二维强耦合复杂等离子晶体中的杂质模式
Pub Date : 2024-07-31 DOI: 10.1088/2058-6272/ad44ef
Shijie WU, 诗杰 吴, Yunqiao XU, 韵乔 徐, Shunyu XIAN, 顺宇 冼, Xianglei HE, 向磊 何, Xiaoyi YANG and 肖易 杨
{"title":"Impurity modes in two-dimensional strongly coupled complex plasma crystals","authors":"Shijie WU, 诗杰 吴, Yunqiao XU, 韵乔 徐, Shunyu XIAN, 顺宇 冼, Xianglei HE, 向磊 何, Xiaoyi YANG and 肖易 杨","doi":"10.1088/2058-6272/ad44ef","DOIUrl":"https://doi.org/10.1088/2058-6272/ad44ef","url":null,"abstract":"Complex plasma fluctuation processes have been extensively studied in many aspects, especially lattice waves in strongly coupled plasma crystals, which are of great significance for understanding fundamental physical phenomena. A challenge of experimental investigations in two-dimensional strongly coupled complex plasma crystals is to keep the main body and foreign particles of different masses on the same horizontal plane. To solve the problem, we have proposed a potential well formed by two negatively biased grids to bind the negatively charged particles in a two-dimensional (2D) plane, thus achieving a 2D plasma crystal in the microgravity environment. The study of such phenomena in complex plasma crystals under microgravity environment then becomes possible. In this paper, we focus on the continuum spectrum, including both phonon and optic branches of the impurity mode in a 2D system in microgravity environments. The results show the dispersion relation of the longitudinal and transverse impurity oscillation modes and their properties. Considering the macroscopic visibility of complex mesoscopic particle lattices, theoretical and experimental studies on this kind of complex plasma systems will help us further understand the physical nature of a wide range of condensed matters.","PeriodicalId":20227,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141531491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Abnormal transition of the electron energy distribution with excitation of the second harmonic in low-pressure radio-frequency capacitively coupled plasmas 低压射频电容耦合等离子体中电子能量分布的异常转变与二次谐波激发
Pub Date : 2024-07-31 DOI: 10.1088/2058-6272/ad4596
Leyi YU, 乐怡 余, Wenqi LU, 文琪 陆, Lina ZHANG and 丽娜 张
{"title":"Abnormal transition of the electron energy distribution with excitation of the second harmonic in low-pressure radio-frequency capacitively coupled plasmas","authors":"Leyi YU, 乐怡 余, Wenqi LU, 文琪 陆, Lina ZHANG and 丽娜 张","doi":"10.1088/2058-6272/ad4596","DOIUrl":"https://doi.org/10.1088/2058-6272/ad4596","url":null,"abstract":"The self-excited second harmonic in radio-frequency capacitively coupled plasma was significantly enhanced by adjusting the external variable capacitor. At a lower pressure of 3 Pa, the excitation of the second harmonic caused an abnormal transition of the electron energy probability function, resulting in abrupt changes in the electron density and temperature. Such changes in the electron energy probability function as well as the electron density and temperature were not observed at the higher pressure of 16 Pa under similar harmonic changes. The phenomena are related to the influence of the second harmonic on stochastic heating, which is determined by both amplitude and the relative phase of the harmonics. The results suggest that the self-excited high-order harmonics must be considered in practical applications of low-pressure radio-frequency capacitively coupled plasmas.","PeriodicalId":20227,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of an electrode-driven hydrogen plasma method for in situ cleaning of tin-based contamination 研究一种用于原位清洁锡基污染物的电极驱动氢等离子体方法
Pub Date : 2024-07-31 DOI: 10.1088/2058-6272/ad4433
Yichao PENG, 怡超 彭, Zongbiao YE, 宗标 叶, Sishu WANG, 思蜀 王, Guo PU, 国 蒲, Xianyang LIU, 显洋 刘, Congcong YUAN, 聪聪 苑, Jiashu LIAO, 加术 廖, Jianjun WEI, 建军 韦, Xingang YU, 新刚 余, Fujun GOU and 富均 芶
{"title":"Investigation of an electrode-driven hydrogen plasma method for in situ cleaning of tin-based contamination","authors":"Yichao PENG, 怡超 彭, Zongbiao YE, 宗标 叶, Sishu WANG, 思蜀 王, Guo PU, 国 蒲, Xianyang LIU, 显洋 刘, Congcong YUAN, 聪聪 苑, Jiashu LIAO, 加术 廖, Jianjun WEI, 建军 韦, Xingang YU, 新刚 余, Fujun GOU and 富均 芶","doi":"10.1088/2058-6272/ad4433","DOIUrl":"https://doi.org/10.1088/2058-6272/ad4433","url":null,"abstract":"To prolong the service life of optics, the feasibility of in situ cleaning of the multilayer mirror (MLM) of tin and its oxidized contamination was investigated using hydrogen plasma at different power levels. Granular tin-based contamination consisting of micro- and macroparticles was deposited on silicon via physical vapor deposition (PVD). The electrode-driven hydrogen plasma at different power levels was systematically diagnosed using a Langmuir probe and a retarding field ion energy analyzer (RFEA). Moreover, the magnitude of the self-biasing voltage was measured at different power levels, and the peak ion energy was corrected for the difference between the RFEA measurements and the self-biasing voltage ( ). XPS analysis of O 1s and Sn 3d peaks demonstrated the chemical reduction process after 1 W cleaning. Analysis of surface and cross-section morphology revealed that holes emerged on the upper part of the macroparticles while its bottom remained smooth. Hills and folds appeared on the upper part of the microparticles, confirming the top-down cleaning mode with hydrogen plasma. This study provides an in situ electrode-driven hydrogen plasma etching process for tin-based contamination and will provide meaningful guidance for understanding the chemical mechanism of reduction and etching.","PeriodicalId":20227,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Real-time data processing method for CO2 dispersion interferometer on EAST EAST 上二氧化碳色散干涉仪的实时数据处理方法
Pub Date : 2024-07-31 DOI: 10.1088/2058-6272/ad4597
Jiamin ZHANG, 家敏 张, Yuan YAO, 远 姚, Yuyang LIU, 郁阳 刘, Yuqi CHU, 宇奇 储, Tianyi RUAN, 天翼 阮, Yao ZHANG, 耀 张, Haiqing LIU, 海庆 刘, Yinxian JIE, 银先 揭, Bili LING and 必利 凌
{"title":"Real-time data processing method for CO2 dispersion interferometer on EAST","authors":"Jiamin ZHANG, 家敏 张, Yuan YAO, 远 姚, Yuyang LIU, 郁阳 刘, Yuqi CHU, 宇奇 储, Tianyi RUAN, 天翼 阮, Yao ZHANG, 耀 张, Haiqing LIU, 海庆 刘, Yinxian JIE, 银先 揭, Bili LING and 必利 凌","doi":"10.1088/2058-6272/ad4597","DOIUrl":"https://doi.org/10.1088/2058-6272/ad4597","url":null,"abstract":"A real-time data processing system is designed for the carbon dioxide dispersion interferometer (CO2-DI) on EAST. The system utilizes the parallel and pipelining capabilities of an field-programmable gate array (FPGA) to digitize and process the intensity of signals from the detector. Finally, the real-time electron density signals are exported through a digital-to-analog converter (DAC) module in the form of analog signals. The system has been successfully applied in the CO2-DI system to provide low-latency electron density input to the plasma control system on EAST. Experimental results of the latest campaign with long-pulse discharges on EAST (2022–2023) demonstrate that the system can respond effectively in the case of rapid density changes, proving its reliability and accuracy for future electron density calculation.","PeriodicalId":20227,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dietary silymarin improves performance by altering hepatic lipid metabolism and cecal microbiota function and its metabolites in late laying hens. 膳食水飞蓟素通过改变后期蛋鸡的肝脏脂质代谢和盲肠微生物群功能及其代谢产物来提高其生产性能。
IF 6.3
Journal of Animal Science and Biotechnology Pub Date : 2024-07-13 DOI: 10.1186/s40104-024-01057-w
Yanghao Guo, Yudong Xu, Derun Wang, Shihao Yang, Zehe Song, Rui Li, Xi He
{"title":"Dietary silymarin improves performance by altering hepatic lipid metabolism and cecal microbiota function and its metabolites in late laying hens.","authors":"Yanghao Guo, Yudong Xu, Derun Wang, Shihao Yang, Zehe Song, Rui Li, Xi He","doi":"10.1186/s40104-024-01057-w","DOIUrl":"https://doi.org/10.1186/s40104-024-01057-w","url":null,"abstract":"<p><strong>Background: </strong>Liver lipid dysregulation is one of the major factors in the decline of production performance in late-stage laying hens. Silymarin (SIL), a natural flavonolignan extracted from milk thistle, is known for its hepatoprotective and lipid-lowering properties in humans. This study evaluates whether SIL can provide similar benefits to late-stage laying hens. A total of 480 68-week-old Lohmann Pink laying hens were randomly assigned into 5 groups, each group consisting of 6 replicates with 16 hens each. The birds received a basal diet either without silymarin (control) or supplemented with silymarin at concentrations of 250, 500, 750, or 1,000 mg/kg (SIL250, SIL500, SIL750, SIL1000) over a 12-week period.</p><p><strong>Results: </strong>The CON group exhibited a significant decline in laying rates from weeks 9 to 12 compared to the initial 4 weeks (P = 0.042), while SIL supplementation maintained consistent laying rates throughout the study (P > 0.05). Notably, the SIL500 and SIL750 groups showed higher average egg weight than the CON group during weeks 5 to 8 (P = 0.049). The SIL750 group had a significantly higher average daily feed intake across the study period (P < 0.05), and the SIL500 group saw a marked decrease in the feed-to-egg ratio from weeks 5 to 8 (P = 0.003). Furthermore, the SIL500 group demonstrated significant reductions in serum ALT and AST levels (P < 0.05) and a significant decrease in serum triglycerides and total cholesterol at week 12 with increasing doses of SIL (P < 0.05). SIL also positively influenced liver enzyme expression (FASN, ACC, Apo-VLDL II, FXR, and CYP7A1; P < 0.05) and altered the cecal microbiota composition, enhancing species linked to secondary bile acid synthesis. Targeted metabolomics identified 9 metabolites predominantly involved in thiamin metabolism that were significantly different in the SIL groups (P < 0.05).</p><p><strong>Conclusions: </strong>Our study demonstrated that dietary SIL supplementation could ameliorate egg production rate in late stage laying hens, mechanistically, this effect was via improving hepatic lipid metabolism and cecal microbiota function to achieve. Revealed the potentially of SIL as a feed supplementation to regulate hepatic lipid metabolism dysregulation. Overall, dietary 500 mg/kg SIL had the best effects.</p>","PeriodicalId":64067,"journal":{"name":"Journal of Animal Science and Biotechnology","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141602290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lysine 2-hydroxyisobutyrylation levels determined adipogenesis and fat accumulation in adipose tissue in pigs. 赖氨酸 2-羟基异丁酰化水平决定了猪脂肪组织中的脂肪生成和脂肪积累。
IF 6.3
Journal of Animal Science and Biotechnology Pub Date : 2024-07-12 DOI: 10.1186/s40104-024-01058-9
Enfa Yan, Mingyang Tan, Ning Jiao, Linjuan He, Boyang Wan, Xin Zhang, Jingdong Yin
{"title":"Lysine 2-hydroxyisobutyrylation levels determined adipogenesis and fat accumulation in adipose tissue in pigs.","authors":"Enfa Yan, Mingyang Tan, Ning Jiao, Linjuan He, Boyang Wan, Xin Zhang, Jingdong Yin","doi":"10.1186/s40104-024-01058-9","DOIUrl":"https://doi.org/10.1186/s40104-024-01058-9","url":null,"abstract":"<p><strong>Background: </strong>Excessive backfat deposition lowering carcass grade is a major concern in the pig industry, especially in most breeds of obese type pigs. The mechanisms involved in adipogenesis and fat accumulation in pigs remain unclear. Lysine 2-hydroxyisobutyrylation (Khib), is a novel protein post-translational modification (PTM), which play an important role in transcription, energy metabolism and metastasis of cancer cells, but its role in adipogenesis and fat accumulation has not been shown.</p><p><strong>Results: </strong>In this study, we first analyzed the modification levels of acetylation (Kac), Khib, crotonylation (Kcr) and succinylation (Ksu) of fibro-adipogenic progenitors (FAPs), myogenic precursors (Myo) and mesenchymal stem cells (MSCs) with varied differentiation potential, and found that only Khib modification in FAPs was significantly higher than that in MSCs. Consistently, in parallel with its regulatory enzymes lysine acetyltransferase 5 (KAT5) and histone deacetylase 2 (HDAC2) protein levels, the Khib levels increased quadratically (P < 0.01) during adipogenic differentiation of FAPs. KAT5 knockdown in FAPs inhibited adipogenic differentiation, while HDAC2 knockdown enhanced adipogenic differentiation. We also demonstrated that Khib modification favored to adipogenic differentiation and fat accumulation by comparing Khib levels in FAPs and backfat tissues both derived from obese-type pigs (Laiwu pigs) and lean-type pigs (Duroc pigs), respectively. Accordingly, the expression patterns of KAT5 and HDAC2 matched well to the degree of backfat accumulation in obese- and lean-type pigs.</p><p><strong>Conclusions: </strong>From the perspective of protein translational modification, we are the first to reveal the role of Khib in adipogenesis and fat deposition in pigs, and provided new clues for the improvement of fat accumulation and distribution as expected via genetic selection and nutritional strategy in obese-type pigs.</p>","PeriodicalId":64067,"journal":{"name":"Journal of Animal Science and Biotechnology","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141592250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of different energy levels in low-protein diet on liver lipid metabolism in the late-phase laying hens through the gut-liver axis. 低蛋白日粮中不同能量水平通过肠肝轴对后期蛋鸡肝脂代谢的影响
IF 6.3
Journal of Animal Science and Biotechnology Pub Date : 2024-07-11 DOI: 10.1186/s40104-024-01055-y
Hong Hu, Ying Huang, Anjian Li, Qianhui Mi, Kunping Wang, Liang Chen, Zelong Zhao, Qiang Zhang, Xi Bai, Hongbin Pan
{"title":"Effects of different energy levels in low-protein diet on liver lipid metabolism in the late-phase laying hens through the gut-liver axis.","authors":"Hong Hu, Ying Huang, Anjian Li, Qianhui Mi, Kunping Wang, Liang Chen, Zelong Zhao, Qiang Zhang, Xi Bai, Hongbin Pan","doi":"10.1186/s40104-024-01055-y","DOIUrl":"10.1186/s40104-024-01055-y","url":null,"abstract":"<p><strong>Background: </strong>The energy/protein imbalance in a low-protein diet induces lipid metabolism disorders in late-phase laying hens. Reducing energy levels in the low-protein diet to adjust the energy-to-protein ratio may improve fat deposition, but this also decreases the laying performance of hens. This study investigated the mechanism by which different energy levels in the low-protein diet influences liver lipid metabolism in late-phase laying hens through the enterohepatic axis to guide feed optimization and nutrition strategies. A total of 288 laying hens were randomly allocated to the normal-energy and normal-protein diet group (positive control: CK) or 1 of 3 groups: low-energy and low-protein diet (LL), normal-energy and low-protein diet (NL), and high-energy and low-protein diet (HL) groups. The energy-to-protein ratios of the CK, LL, NL, and HL diets were 0.67, 0.74, 0.77, and 0.80, respectively.</p><p><strong>Results: </strong>Compared with the CK group, egg quality deteriorated with increasing energy intake in late-phase laying hens fed low-protein diet. Hens fed LL, NL, and HL diets had significantly higher triglyceride, total cholesterol, acetyl-CoA carboxylase, and fatty acid synthase levels, but significantly lower hepatic lipase levels compared with the CK group. Liver transcriptome sequencing revealed that genes involved in fatty acid beta-oxidation (ACOX1, HADHA, EHHADH, and ACAA1) were downregulated, whereas genes related to fatty acid synthesis (SCD, FASN, and ACACA) were upregulated in LL group compared with the CK group. Comparison of the cecal microbiome showed that in hens fed an LL diet, Lactobacillus and Desulfovibrio were enriched, whereas riboflavin metabolism was suppressed. Cecal metabolites that were most significantly affected by the LL diet included several vitamins, such as riboflavin (vitamin B<sub>2</sub>), pantethine (vitamin B<sub>5</sub> derivative), pyridoxine (vitamin B<sub>6</sub>), and 4-pyridoxic acid.</p><p><strong>Conclusion: </strong>A lipid metabolism disorder due to deficiencies of vitamin B<sub>2</sub> and pantethine originating from the metabolism of the cecal microbiome may be the underlying reason for fat accumulation in the liver of late-phase laying hens fed an LL diet. Based on the present study, we propose that targeting vitamin B<sub>2</sub> and pantethine (vitamin B<sub>5</sub> derivative) might be an effective strategy for improving lipid metabolism in late-phase laying hens fed a low-protein diet.</p>","PeriodicalId":64067,"journal":{"name":"Journal of Animal Science and Biotechnology","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141581686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Super-resolution diffractive neural network for all-optical direction of arrival estimation beyond diffraction limits 用于超越衍射极限的全光学到达方向估计的超分辨率衍射神经网络
Light-Science & Applications Pub Date : 2024-07-10 DOI: 10.1038/s41377-024-01511-4
Sheng Gao, Hang Chen, Yichen Wang, Zhengyang Duan, Haiou Zhang, Zhi Sun, Yuan Shen, Xing Lin
{"title":"Super-resolution diffractive neural network for all-optical direction of arrival estimation beyond diffraction limits","authors":"Sheng Gao, Hang Chen, Yichen Wang, Zhengyang Duan, Haiou Zhang, Zhi Sun, Yuan Shen, Xing Lin","doi":"10.1038/s41377-024-01511-4","DOIUrl":"https://doi.org/10.1038/s41377-024-01511-4","url":null,"abstract":"<p>Wireless sensing of the wave propagation direction from radio sources lays the foundation for communication, radar, navigation, etc. However, the existing signal processing paradigm for the direction of arrival estimation requires the radio frequency electronic circuit to demodulate and sample the multichannel baseband signals followed by a complicated computing process, which places the fundamental limit on its sensing speed and energy efficiency. Here, we propose the super-resolution diffractive neural networks (S-DNN) to process electromagnetic (EM) waves directly for the DOA estimation at the speed of light. The multilayer meta-structures of S-DNN generate super-oscillatory angular responses in local angular regions that can perform the all-optical DOA estimation with angular resolutions beyond the diffraction limit. The spatial-temporal multiplexing of passive and reconfigurable S-DNNs is utilized to achieve high-resolution DOA estimation over a wide field of view. The S-DNN is validated for the DOA estimation of multiple radio sources over 5 GHz frequency bandwidth with estimation latency over two to four orders of magnitude lower than the state-of-the-art commercial devices in principle. The results achieve the angular resolution over an order of magnitude, experimentally demonstrated with four times, higher than diffraction-limited resolution. We also apply S-DNN’s edge computing capability, assisted by reconfigurable intelligent surfaces, for extremely low-latency integrated sensing and communication with low power consumption. Our work is a significant step towards utilizing photonic computing processors to facilitate various wireless sensing and communication tasks with advantages in both computing paradigms and performance over electronic computing.</p>","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141566294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Incremental Distillation Physics-Informed Neural Network (IDPINN) Accurately Models the Evolution of Optical Solitons 增量蒸馏物理信息神经网络 (IDPINN) 准确模拟光学孤子的演变
Pub Date : 2024-07-10 DOI: 10.1007/s11424-024-3449-9
Zhiyang Zhang, Muwei Liu, Wenjun Liu
{"title":"Incremental Distillation Physics-Informed Neural Network (IDPINN) Accurately Models the Evolution of Optical Solitons","authors":"Zhiyang Zhang, Muwei Liu, Wenjun Liu","doi":"10.1007/s11424-024-3449-9","DOIUrl":"https://doi.org/10.1007/s11424-024-3449-9","url":null,"abstract":"<p>Optical solitons play an important role in long-distance, high-capacity communications. To enhance the precision of soliton dynamics modeling, the authors combine incremental learning techniques with physics-informed neural network. The novel model employs a process of knowledge distillation and fine-tuning to continually integrate fresh physical information into the neural network. This iterative approach leads to a constant improvement in the network’s ability to extract features. The authors conduct experiments on three solitons, and the new method significantly reduces the error compared to the general physics-informed neural network. The modeling approach put forward in this research is anticipated to contribute to the advancement of all-optical computing research and facilitate the development of novel fiber optic communication systems.</p>","PeriodicalId":17145,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141566684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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