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A method of dynamic union control for intelligent mould bed system in ship block building

SHIPS AND OFFSHORE STRUCTURES 2022年第8期17卷 1755-1763页

作者： Wang, Zhen Jing, xuwen Cai, Youhui liu, Jinfeng Zhu, Tianhu Zhou, Honggen Tang, Mingming li, Lei li, Chunjin Dong, Lei Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212003 Jiangsu Peoples R China Univ Chinese Acad Sci Shenyang Inst Comp Technol Beijing Peoples R China

Mould bed is the most important equipment to control the deformation in the process of block construction. However, its height needs to be controlled separately based on the known height, and it affects the construction precision of block severely. Therefore, a dynamic union control method is proposed in this paper. Firstly, in order to realize the union control of mould bed system, the distribution types of mould bed system are defined, and a dynamic relationship is established, the determination algorithm number, position and height compensation layer number is proposed. Secondly, the fuzzy PID control based on neural network is used to realize the adaptive control of height according to the changes of pressure, so as to control the construction quality better of block. Thirdly, the MATLAB/Simulink module is used to verify the proposed method and shows that the response time is significantly shortened by 41% and 37.5% respectively.

关键词： Ship block construction dynamic control intelligence mould bed fuzzy neural network PID

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Factors associated with blooms of cyanobacteria in a large shallow lake, China

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ENVIRONMENTAL SCIENCES EUROPE 2018年第1期30卷 1-15页

作者： li, Di Wu, Naicheng Tang, Song Su, Guanyong li, xuwen Zhang, Yong Wang, Guoxiang Zhang, Junyi liu, Hongling Hecker, Markus Giesy, John P. Yu, Hongxia Nanjing Univ Sch Environm State Key Lab Pollut Control & Resource Reuse Nanjing 210046 Jiangsu Peoples R China Jiangsu Environm Monitoring Ctr Nanjing 210036 Jiangsu Peoples R China Univ Kiel Dept Hydrol & Water Resources Management D-24118 Kiel Germany Chinese Ctr Dis Control & Prevent Natl Inst Environm Hlth Beijing 100021 Peoples R China Nanjing Univ Sci & Technol Sch Environm & Biol Engn Jiangsu Key Lab Chem Pollut Control & Resources R Nanjing 210094 Jiangsu Peoples R China Nanjing Normal Univ Sch Environm Nanjing 210023 Jiangsu Peoples R China Wuxi Environm Monitoring Ctr Wuxi 214000 Jiangsu Peoples R China Univ Saskatchewan Toxicol Ctr Saskatoon SK S7N 5B3 Canada Univ Saskatchewan Sch Environm & Sustainabil Saskatoon SK S7N 5C3 Canada Univ Saskatchewan Dept Vet Biomed Sci Saskatoon SK S7N 5B3 Canada Univ Saskatchewan Toxicol Ctr Saskatoon SK S7N 5B3 Canada Michigan State Univ Dept Zool E Lansing MI 48824 USA Michigan State Univ Ctr Integrat Toxicol E Lansing MI 48824 USA Univ Hong Kong Sch Biol Sci Hong Kong Hong Kong Peoples R China

Background: Eutrophication of freshwater systems can result in blooms of phytoplankton, in many cases cyanobacteria. This can lead to shifts in structure and functions of phytoplankton communities adversely affecting the quality of drinking water sources, which in turn impairs public health. Relationships between structures of phytoplankton communities and concentrations of the toxicant, microcystin-leucine-arginine (MC-LR), have not been well examined in large shallow lakes. The present study investigated phytoplankton communities at seven locations from January to December of 2015 in Tai Lake, and relationships between structures and diversities of phytoplankton communities and water quality parameters, including concentrations of MC-LR and metals, were analyzed. Results: A total of 124 taxa of phytoplankton were observed, and the predominant taxa were Microcystis sp. and Dolichospermum flos-aquae of Cyanophyta and Planctonema sp. of Chlorophyta. The greatest diversities of phytoplankton communities, as indicated by species richness, Simpson, Shannon-Wiener, the Berger and Parker, and the Pielou evenness indices, were observed in spring. Furthermore, productivity of phytoplankton was significantly and negatively correlated with diversities. These results demonstrated that Simpson, Shannon-Wiener, the Berger and Parker, and the Pielou evenness indices of phytoplankton communities were significantly related to trophic status and overall primary productivity in Tai Lake. In addition, temperature of surface water, pH, permanganate index, biochemical oxygen demand, total phosphorus, arsenic, total nitrogen/total phosphorous ratio, and MC-LR were the main factors associated with structures of phytoplankton communities in Tai Lake. Conclusion: The present study provided helpful information on phytoplankton community structure and diversity in Tai Lake from January to December of 2015. Our findings demonstrated that Simpson, Shannon-Wiener, the Berger and Parker, and the

关键词： Eutrophication Nutrients Phosphorus Nitrogen Phytoplankton productivity Diversity Microcystin-LR

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Cocrystals of axially N-embedded quasi-carbon nanohoops via modulating the electron affinity of guest acceptors

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Science China Chemistry 2025年

作者： li Zhang Shuhai Qiu Shunlong Hu Hanren Xu xuwen Sun Wei Jiang Da-Hui Qu Zhaohui Wang Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materi-obiology and Dynamic Chemistry Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology Key Laboratory of Organic Optoelectronics and Molecular Engineering Department of Chemistry Tsinghua University

Organic donor-acceptor cocrystals of π-conjugated molecues have shown diverse applications in materials science. However,most cocrystals exist in neutral forms dominated by π-π interactions, while the ionic congeners and corresponding properties are rarely studied due to difficulties in harnessing the degree of charge transfer. Herein, we report cocrystals of axially N-embedded quasi-carbon nanohoops(DPP-D and DPP-T) with electron deficient guests. By modulating the electron affinity of the acceptor guests, the electronic structures of the complexes can be tuned from neutral to ionic states. Specifically, DPP-D interacts with TCNB molecules to form neutral superstructures via intermolecular π-π interactions, giving rise to a deep-red emission in the solid state. In contrast, an ionic complex showing near-infrared region absorptions and paramagnetic character on account of strong charge-transfer interactions is generated when DDQ molecules are involved. Their unique properties can be explained by different degrees of charge transfer and assembly modes, which have clearly been manifested by crystal structures and theoretical calculations. Our studies provide rare examples of π-conjugated macrocycle-based donor-acceptor cocrystals in both neutral and ionic forms, and give insight to the design of multicomponent carbon nanomaterials.

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Genesis of the Hatu gold deposit: Constrained by in situ S-Pb isotope geochemistry of pyrite

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JOURNAL OF GEOCHEMICAL EXPLORATION 2023年第1期254卷

作者： An, Fang Zhu, Yongfeng Wang, xuwen li, Yuxuan Qiang, Jianli Northwest Univ Dept Geol State Key Lab Continental Dynam Xian 710069 Peoples R China Peking Univ Sch Earth & Space Sci Key Lab Orogen Belts & Crustal Evolut Beijing 100871 Peoples R China PetroChina Tarim Oilfield Co Explorat & Dev Res Inst Korla 84100 Peoples R China Northwest Univ Dept Geol Xian 710069 Peoples R China

As the largest gold deposit in west Junggar, the Hatu gold deposit is located between the Anqi and Hatu faults in the Hatu-Sartohay district. The orebodies, composed of gold-bearing quartz veins and auriferous altered wall-rocks, are controlled by NE-, NW-, and EW-trending faults in Early Carboniferous volcano-sedimentary rocks. In this study, integrated textural, in situ sulfur and lead isotope analyses of pyrite grains in the host rocks and ores reveal new information on the sources of the ore-forming fluids and metal, as well as the mechanism of gold deposition. Framboidal pyrite in tuffaceous siltstone has a large 834S range of-26.7 to +54.0 %o, which is attributed to sulfur-reducing bacterial (SRB) activity during sedimentary-diagenetic process. Fine-grained sub-hedral pyrite in meta-basalt shows negative 834S values from-26.7 to-12.1 %o, which may be generated by reduction of seawater sulfate by ferrous iron bearing minerals during metamorphism. The 834S values of four generations of hydrothermal pyrite (Py1-Py4) in the orebodies vary in a narrow range from +1.4 to-1.9 %o. The sulfur isotopic characteristics of the hydrothermal pyrite are similar to most magmatic hydrothermal deposits, but differ from the metamorphic pyrite in meta-basalt and the framboidal pyrite in tuffaceous siltstone. In addition, the uniform in situ lead isotope ratios of hydrothermal pyrite resemble the lead isotopic compositions of the granitic plutons in the west Junggar, but differ from those of pyrite in meta-basalt. The progressive decrease of 834S values from early-stage pyrite (+0.7 %o to +1.4 %o) to late-stage pyrite (-1.9 %o to +0.4 %o) corresponds to the major gold precipitation processes, which can be explained by gradual decrease of oxygen fugacity and increase of pH with decrease of temperature of a gold-bearing magmatic-hydrothermal system. A relatively stable environment for Au precipitation probably is a key factor controlling the scale of gold deposit, as the ore-forming

关键词： Pyrite In situ sulfur and lead isotope Ore genesis Hatu gold deposit

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aMAP Score as a Predictor for Long-Term Outcomes in Patients with HBV-Related Acute-on-Chronic liver Failure

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INTERNATIONAL JOURNAL OF GENERAL MEDICINE 2022年 15卷 407-415页

作者： Sun, Yunqing li, Zhuohong liao, Guichan Xia, Muye Xu, xuwen Cai, Shaohang Peng, Jie Southern Med Univ Nanfang Hosp Dept Infect Dis Guangzhou Guangdong Peoples R China

Background and Aim: The long-term outcomes of patients with hepatitis B virus-related acute-on-chronic liver failure (HBV-ACLF) remain not well known. This study aimed to investigate whether aMAP score can predict re-hospitalization, hepatocellular carcinoma (HCC) occurrence and long-term mortality in patients with HBV-ACLF. Methods: A total of 82 patients diagnosed with HBV-ACLF and survived over 6 months were enrolled. The median follow-up period was 105 (75.9, 134.1) months. The Cox proportional hazards or logistic regression analysis was used to determine independent risk factors. Cumulative incidence of HCC and survival rate were evaluated using Kaplan-Meier analysis. Results: Multivariate analysis identified that the aMAP risk score was an independent predictor of re-hospitalization (odds ratio [OR] = 1.112, 95% confidence interval [CI]: 1.021-1.211, p = 0.015), hepatocellular carcinoma occurrence (hazards ratio [HR] = 2.277, 95% CI: 1.014-5.114, p = 0.046) and mortality (HR = 1.366, 95% CI: 1.040-1.794, p = 0.025). High-risk aMAP scores were associated with higher risk of HCC occurrence and mortality. Conclusion: A higher aMAP score was an independent risk predictor of re-hospitalization, HCC occurrence and mortality, respectively, in HBV-ACLF patients who survived over 6 months, which can be applicable for early risk stratification and clinical decision.

关键词： acute-on-chronic liver failure chronic hepatitis B virus infection re-hospitalization hepatocellular carcinoma mortality prognosis

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Glow and Flash Adjustable Chemiluminescence with Tunable Waveband from the Same CuInS2@ZnS Nanocrystal Luminophore

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ANALYTICAL CHEMISTRY 2022年第18期94卷 6902-6908页

作者： Dong, Shuangtian Wang, Dongyang Gao, xuwen Fu, li Jia, Jingna Xu, Yuqi Zhang, Bin Zou, Guizheng Shandong Univ Sch Chem & Chem Engn Jinan 250100 Peoples R China

All commercial chemiluminescence (CL) assays are conducted with either glow or flash CL of eye-visible waveband from chemical luminophores. Herein, glow and flash, as well as waveband adjustable CL from the same nanoparticle luminophore of thiol-capped CuInS2@ZnS nanocrystals (CIS@ZnS-Thiol), are proposed via extensively exploiting the differed redox nature of CL triggering reagents. Taking thiosalicylic acid (TSA) as the model thiol-capping agent, the electron-injection-initiated charge transfer between CIS@ZnS-TSA and reductant can bring out efficient glow CL while the hole-injection-initiated charge transfer between CIS@ZnS-TSA and oxidant can give off obvious flash CL under optimum conditions. The maximum emission wavelength for CL of CIS@ZnS-TSA is adjustable from 730 nm to 823 nm via employing different triggering agents. Promisingly, the coexistent reductant of N2H4 center dot H2O and oxidant of H2O2 can be employed as dual triggering reagents to trigger eye-visible and highly efficient flash CL from CIS@ZnS-TSA. The maximum emission intensity for flash CL of CIS@ZnS-TSA/N2H4-H2O2 is 101-fold greater than the glow CL of CIS@ZnS-TSA/N2H4 and 22-fold greater than the flash CL of CIS@ZnS-TSA/H2O2, respectively. The flash CL from CIS@ZnS-TSA/N2H4-H2O2 is qualified for highly sensitive and selective CL immunoassay in a commercialized typical procedure with the entire operating process manually terminated within 35 min.

关键词： Glow Luminophore Chemiluminescence Flash

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Low-Triggering-Potential Electrochemiluminescence from Surface-Confined CuInS2@ZnS Nanocrystals and their Biosensing Applications

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ANALYTICAL CHEMISTRY 2021年第36期93卷 12250-12256页

作者： Dong, Shuangtian Gao, xuwen Fu, li Jia, Jingna Zou, Guizheng Shandong Univ Sch Chem & Chem Engn Jinan 250100 Peoples R China

Electrochemiluminescence (ECL) of low triggering potential is strongly anticipated for ECL assays with less inherent electrochemical interference and improved long-term stability of the working electrode. Herein, effects of the thiol capping agents and the states of luminophores, i.e., the thiol-capped CuInS2@ZnS nanocrystals (CuInS2@ZnS-Thiol), on the ECL triggering potential of CuInS2@ZnS-Thiol/N2H4 center dot H2O were explored on the Au working electrode. The thiol capping agent of glutathione (GSH) not only enabled CuInS2@ZnS-Thiol/N2H4 center dot H2O with the stronger oxidative-reduction ECL than other thiol capping agents but also demonstrated the largest shift for the ECL triggering potential of CuInS2@ZnS-Thiol/N2H4 center dot H2O upon changing the luminophores from the monodispersed state to the surface-confined state. CuInS2@ZnS-GSH/N2H4 center dot H2O exhibited an efficient oxidative-reduction ECL around 0.78 V (vs Ag/AgCl) with CuInS2@ZnS-GSH of the monodispersed state. Upon employing CuInS2@ZnS-GSH as the ECL tag and immobilizing them onto the Au working electrode, the oxidative-reduction ECL of CuInS2@ZnS-GSH/N2H4 center dot H2O was lowered to 0.32 V (vs Ag/AgCl), which was about 0.88 V lower than that of traditional Ru(bpy)(3)(2+)/TPrA (typically similar to 1.2 V, vs Ag/AgCl). The ECL of the CuInS2@ZnS-GSH/N2H4 center dot H2O system with the luminophore of both monodispersed and surface-confined states was spectrally identical to each other, indicating that this surface-confining strategy exhibited negligible effect on the excited state for the ECL of CuInS2@ZnS-GSH. A surface-confined ECL sensor around 0.32 V was fabricated with CuInS2@ZnS-GSH as a luminophore, which could sensitively and selectively determine the K-RAS gene from 1 to 500 pM with a limit of detection at 0.5 pmol L-1 (S/N = 3).

关键词： Electrochemiluminescence Biosensor

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Finite element analysis of corn kernel damage: a viscoelastic model approach for impact-induced damage prediction

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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2025年第7期105卷 3993-4004页

作者： Zhao, Xuelin Zhang, Qiang Fang, xuwen Zhang, Jinsong Feng, Weijing Zhang, li Zhou, Deyi Yu, Chunsheng Wang, Hao Gao, Xiaodi Zhou, Haigen Wu, Xinling Jilin Univ Coll Biol & Agr Engn Changchun 130022 Peoples R China

BACKGROUNDIn the present study, we address the quality degradation of corn during post-harvest processing by developing a viscoelastic composite model to predict kernel damage during post-harvest processing. The model, based on high-resolution scanning and inverse modeling techniques, provides an accurate representation of the complex internal components of corn kernels, which allows for the analysis of their stress response and damage susceptibility trends under different impact *** results show that the viscoelastic model has a relative error of 2.4% compared to the drop test data, thus demonstrating that the viscoelastic model has a very high accuracy in predicting impact damage and is able to accurately localize the flour-like endosperm as the main region of impact damage. The model showed a high correlation (0.99) between predicted and experimental damage rates by response surface *** damage during processing is reduced by reducing the proportion of flour-like endosperm in maize kernels. A new method for reducing damage during food handling and processing operations is proposed, providing an important reference for improving kernel durability and contributing to the development of gentler processing techniques to improve the quality of maize products. (c) 2025 Society of Chemical Industry.

关键词： viscoelastic composite model collision damage finite element method burgers model high moisture corn kernel

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Fabrication of CoNPs-embedded porous carbon composites based on morphochemical imprinting strategy for detection of H2O2 released from living cells

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ELECTROCHIMICA ACTA 2019年 321卷 134717-000页

作者： Lu, Nannan Zheng, Bo Gu, Yue Yan, Xiaoyi Zhang, Tingting liu, He Xu, Haixin Xu, Zhiqian li, xuwen Zhang, Zhiquan Jilin Univ Coll Chem Changchun 130012 Jilin Peoples R China Weinan Normal Univ Coll Chem & Mat Weinan City 714099 Peoples R China

Rational construction of biosensor to determine reactive oxygen species (ROS) generated from living cells is one of the great challenges in physiological and pathological fields. Herein, for the first time, a novel Co nanoparticles (CoNPs) embedded walnut-like N-doped porous carbon microsphere (Co@NCS) can be synthesized using dual imprinting strategy by pyrolysis and acid leaching. The distinct morphology and chemical characteristic of melamine cyanurate (MC) aggregates can be imprinted in the carbon source derived from glucose during the pyrolysis process. According to our research, with synergistic effect of CoHPs and NCS, the Co@NCS shows an excellent electrochemical activity toward the reduction of hydrogen peroxide (H2O2). The Co@NCS modified electrode exhibits a wider linear detection response with the range from 0.5 mu M to 7500 mu M and a low detection limit of 88 nM (S/N = 3). Moreover, with desirable selectivity, decent reproducibility and satisfied anti-interference performance, the fabricated biosensor can be applied to determine H2O2 in human serum samples and that released from living cell, indicating the potential applications in the fields of pathological and physiological sensing. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： Co nanoparticles Porous carbon microspheres Biosensor Hydrogen peroxide living cells

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End-To-End Individual Pig Detection Based on Transfer Learning 6

End-To-End Individual Pig Detection Based on Transfer Learni...

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6th IEEE International Conference on Pattern Recognition and Artificial Intelligence, PRAI 2023

作者： Huang, Zihan li, Hao Xiong, Xiaorui He, xuwen Song, Rui Huang, Mengzhen Wuhan Polytechnic University School of Mathematics and Computer Science Wuhan China

ISBN: (纸本)9798350325485

Nowadays, monitoring animals manually on a large scale is challenging, while external devices can provide more prosperous and accurate information. Therefore, there are already applications incorporating wearable sensors to monitor individual pigs. With continued breakthroughs in computer vision, low-cost visible light cameras can help monitor pigs. CNN-based object detection methods have been applied to individual pig detection, but most rely on hand-designed components and require prior knowledge. Based on previous researchers' progress, we propose using DETR, an end-To-end object detection method, to detect individual pigs. Also, to adapt to our natural pig farm environment, we trained the model with transfer learning to achieve an AP of 0.995 on our collected dataset. © 2023 IEEE.

关键词： Object detection

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