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Pattern Recognition and Artificial Intelligence (PRAI), International Conference on

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

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.

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Shifting from Metro to Sustainable Surface Modes for Short-Distance Travel

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TRANSPORTATION RESEARCH RECORD 2016年第2541期2541卷 38-45页

作者： Zacharias, John li, xuwen Peking Univ Coll Architecture & Landscape 5 Yihe Yuan Rd Beijing 100871 Peoples R China

Many cities with metro systems are experiencing overcapacity problems on some or many lines. Beijing is one such city whose metro also services a high proportion of short-distance trips. The proportion of short-distance travel-less than 5 km (3.1 mi)-carried out on foot or on bicycle varies greatly across cities, depending on alternative travel modes and local environmental conditions. In this study, users of a multimodal transportation corridor that included metro (n = 400) were interviewed about their travel mode preferences depending on distance within the short-distance travel category. Users were also asked to state their preferences for mode, depending on distance and a progressive rise in metro ticket fare. Finally, users were asked to state their mode preferences for trips that extended to five metro stations if a public bicycle system with a separate lane were made available. Modal choice was highly sensitive to variable short-distance trips. A progressive shift to bus use occurred as the metro fare price increased, with little change in the walking rate or in the use of motorized modes. When the original low metro fare price was maintained, the availability of a public bicycle system led to a sevenfold increase in bicycle use, with significant drops in bus share, and to a lesser extent, metro share. Responses to the stated preference survey indicated that fares and a public bicycle program might be effective to manage the use of metro for short-distance trips.

关键词： Bicycles

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Association Between Nutritional Risk Screening Score and Prognosis of Patients with Sepsis

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INFECTION AND DRUG RESISTANCE 2021年 14卷 3817-3825页

作者： Gao, Qiqing Cheng, Yao li, Zhuohong Tang, Qingyun Qiu, Rong Cai, Shaohang Xu, xuwen Peng, Jie Xie, Hongyan Southern Med Univ Nanfang Hosp Dept Infect Dis Guangzhou 510515 Guangdong Peoples R China

Background: Malnutrition is one of the most critical factors affecting patients' risk of infection and length of stay, and it may affect the prognosis of patients with sepsis. There have been no studies that have applied nutritional risk screening tools to stratify patients with sepsis according to prognosis. Methods: We retrospectively analyzed the clinical data of 425 adult sepsis inpatients who were grouped based on nutritional risk screening (NRS) score, including a nutrition score, disease severity score, and age score. Prognostic factors were analyzed using univariate and multivariate regression analyses. Results: Of the enrolled patients, 174 had an NRS score of >3;these patients were older and had a longer hospitalization time but lower body mass index (BMI), albumin (ALB) than others. Univariate Cox regression analysis showed that age, ALB, C-reactive protein (CRP), and NRS score were significantly (P<0.05) associated with in-hospital mortality. Multivariate analysis showed that age (hazard ratio [HR]=1.020, 95% confidence interval [CI]: 1.005- 1.036;P=0.008) and ALB (HR=0.924, 95% CI: 0.885-0.966;P<0.001) were independent risk factors for sepsis-related mortality. The Kaplan-Meier analysis revealed that the cumu-lative in-hospital mortality of sepsis patients with an NRS score of >3 was significantly higher than that of patients with an NRS score of <3 (P=0.022). Conclusion: NRS scores can effectively risk stratify sepsis patients. Patients with high NRS scores should be monitored more closely to halt further disease progression.

关键词： sepsis malnutrition NRS risk stratification prognostic assessment

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高盐矿井水浓缩液双极膜电渗析试验研究

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煤炭科学技术 2023年第11期51卷 248-254页

作者：李福勤薛甜丽高珊珊豆硕超何绪文河北工程大学能源与环境工程学院河北邯郸056038 河北省水污染控制与水生态修复技术创新中心河北邯郸056038 中国矿业大学(北京)化学与环境工程学院北京100083

基于高盐矿井水的零排放和资源化利用,采用BP-A-C-BP三隔室构型的双极膜电渗析处理高盐矿井水浓缩液。以河北某矿高盐矿井水为原水,经过预处理+RO+脱碳+浓水RO+ED浓缩,最终浓缩液TDS质量浓度达到93040 mg/L,进行双极膜电渗析试验,探究... 详细信息

基于高盐矿井水的零排放和资源化利用,采用BP-A-C-BP三隔室构型的双极膜电渗析处理高盐矿井水浓缩液。以河北某矿高盐矿井水为原水,经过预处理+RO+脱碳+浓水RO+ED浓缩,最终浓缩液TDS质量浓度达到93040 mg/L,进行双极膜电渗析试验,探究了电流密度、循环流量以及极室电解质浓度对于双极膜电渗析产酸碱效果的影响。结果表明:电流密度10~40 mA/cm^(2),随着电流密度的增大,操作电压升高,电流效率和产能逐渐减小,能耗逐渐增加,最佳电流密度为30 mA/cm^(2);循环流量10~30 L/h,随着循环流量的增大,电流效率和产能上升、能耗降低,进一步提高循环流量至40 L/h时反而增加能耗,降低产能,最佳循环流量为30 L/h;极室电解质浓度不宜过低、过高,容易增加能耗,浓度适中时的双极膜电渗析的水解离效果最好,最佳极室电解质浓度为2%。初始盐室浓缩液4 L、酸室和碱室分别为去离子水1.5 L、极室2%硫酸钠溶液2 L,电流密度为30 mA/cm^(2),极室循环流量为60 L/h,其他各室循环流量为30 L/h,运行120 min时,酸、碱浓度分别为6.91%、5.38%,达到试验预期目标,电流效率、产能及能耗分别为74.21%、1.49 kg/(m^(2)·h)、1.66 kWh/kg。经双极膜电渗析工艺产生的酸碱液可用于高盐矿井水零排放工艺以及煤炭下游产业链中,实现了浓缩液的非相变资源化,避免出现杂盐难处理的问题,同时也提高了废水的经济价值。

关键词：矿井水处理高盐矿井水双极膜电渗析浓缩液水解离矿井水资源化

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Development of hard X-ray spectrometer with full digital data acquisition for runaway electron studies at HL-2M

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JOURNAL OF INSTRUMENTATION 2023年第2期18卷 T02006页

作者： Cheng, Shikui Zhang, Jie Zhang, Yipo He, li Xu, Hongbing Zhu, Yuxuan Zhan, xuwen Shi, Zhongbing Zhong, Wulv Southwestern Inst Phys Chengdu 610041 Sichuan Peoples R China Chengdu Univ Technol Coll Nucl Technol & Automat Engn Chengdu 610059 Sichuan Peoples R China

The development of hard X-ray (HXR) spectrometers with full digital data acquisition for runaway electron studies on the HL-2M tokamak is presented. Consisting of large-sized NaI:Tl detectors and high-performance multichannel analyzers, this system can realize the measurement of HXR with energies ranging from 0.5 to 10 MeV, and spectrum temporal resolution of 1 ms. An average energy resolution of 56 keV at 662 keV has been achieved at counts rates of about 100 kcps. The spectra data is acquired by a digital-based data acquisition system with fast digitization and software signal processing technology. The energy calibrations are performed by using several radioisotope gamma-ray sources, and the detection efficiencies are simulated by MCNP code. First experimental results from HL-2M Ohmic discharges are presented in this paper.

关键词： Nuclear instruments and methods for hot plasma diagnostics Gamma detectors (scin- tillators CZT HPGe HgI etc) X-ray detectors

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Ce⁴⁺ doping to modulate electrochemical and radiative-charge-transfer behaviors of CsPbBr3 perovskite nanocrystals

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JOURNAL OF ELECTROANALYTICAL CHEMISTRY 2020年 876卷 114546-114546页

作者： Fu, li Fu, Kena Hsu, Hsien-Yi Gao, xuwen Zou, Guizheng Shandong Univ Sch Chem & Chem Engn Jinan 250100 Peoples R China City Univ Hong Kong Sch Energy & Environm Kowloon Tong Hong Kong Peoples R China City Univ Hong Kong Dept Mat Sci & Engn Kowloon Tong Hong Kong Peoples R China

Tunable morphology and radiative charge transfer of perovskite nanocrystals (PNCs) were achieved by heterovalently doping CsPbBr3 PNCs with Ce(IV) cation in a hot-injection and doping-in-growth combined way. Ce(IV)-doping could bring out a new tetragonal CsPb2Br5 phase within the parent PNCs, and transformcubic CsPbBr3 PNCs to Ce4+-doped CsPbBr3 PNCs with a dot-shaped morphology of smaller size. Ce4+-doped CsPbBr3 PNCs exhibited enhanced absorption and electrochemical oxidative response as well as decreased photoluminescence and electrochemiluminescence than the parent CsPbBr3 PNCs. Processing Ce4+-doped CsPbBr3 PNCs with NH3 center dot H2O could eliminate the effects of ionic Ce(IV) dopants via forming CeO2, and enable CsPbBr3-CeO2 hybrids to directionally grow to columnar-morphology with partially restored photoluminescence and electrochemiluminescence.

关键词： CsPbBr3 perovskite nanocrystals Ce(IV) cation Heterovalently doping Photoluminescence Electrochemiluminescence

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A novel storage and extraction method using solid-phase adsorption and ultrasonic-assisted nebulization extraction coupled to solid phase extraction

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ANALYTICAL METHODS 2017年第33期9卷 4863-4872页

作者： Zhang, Peixu li, xuwen Cui, li Chen, Jiafeng Qu, Yan Wang, Xiaozhong Wu, Qian liu, Ying Zhou, Chunkui Jin, Yongri Jilin Univ Hosp 1 Dept Neurol Changchun 130031 Jilin Peoples R China Jilin Univ Coll Chem Changchun 130021 Jilin Peoples R China Jilin Women & Children Hlth Hosp Blood Bank Changchun 130021 Jilin Peoples R China

A novel storage and extraction method was developed for biofluids. Plasma spiked with four types of minor ginsenosides (Rg(2), Rg(3), Rh-1 and Rh-2) was used as a model biofluid to evaluate this method. The method was based on solid-phase adsorption and ultrasonic-assisted nebulization coupled with solid phase extraction (SPA-UANE-SPE). Diatomaceous earth was used as an adsorbent to store the plasma for long periods of time at room temperature. Ultrasonic-assisted nebulization system-solid phase extraction was used to extract the four minor ginsenosides from the plasma. Some experimental parameters, such as the type and amount of the adsorbent, the ultrasonic-assisted nebulization extraction time, the pH of the extraction solution, the concentration of ZnSO4, the amount of C-18, and the type and volume of the eluent were investigated and optimized. Under the optimized conditions, the recoveries of four minor ginsenosides were in the range of 78.5-91.4%, and the RSDs are in the range of 3.5-4.4%. For the storage stability test, the stability of the method was better than that of 4 degrees C storage and was similar to that of -20 degrees C storage. Compared with other methods, the proposed method had a better extraction performance and was advantageous in terms of ease of operation, stable long term storage, and minimal requirements for storage conditions. Thus, this method may be effective for sample preparation in biofluid analysis.

关键词： Extraction

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纤维增强复合材料钻削热研究进展与展望

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复合材料学报 2023年第8期40卷 4416-4439页

作者：刘勇潘子韬周宏根景旭文李国超江苏科技大学机械工程学院镇江212100

纤维增强复合材料(Fiber reinforced composites,FRC)钻削过程中产生的切削热及冷却策略对其工艺参数的优化与加工表面质量的控制起着至关重要的作用。本文从钻削热理论研究、钻削热对加工质量的影响研究、钻削热的影响因素与控制策略3... 详细信息

纤维增强复合材料(Fiber reinforced composites,FRC)钻削过程中产生的切削热及冷却策略对其工艺参数的优化与加工表面质量的控制起着至关重要的作用。本文从钻削热理论研究、钻削热对加工质量的影响研究、钻削热的影响因素与控制策略3个方面对FRC钻削热进行系统性的分析与概述。首先,综述了FRC钻孔过程中的钻削热形成机制、热传导与热损伤预测、切削热的数值模拟等理论研究。然后,阐述了FRC钻削热的主要测量方法及切削热对孔加工质量的影响,并探讨了FRC制孔的切削热影响因素及其辅助加工控制钻削热方法。最后,总结了当前FRC钻削热研究存在的问题及今后研究的重点。

关键词：纤维增强复合材料钻削热加工质量钻削刀具冷却控制方法

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Polyphenols-inspired interface modification and reduced agglomeration of solid propellants via a functionalized fluorine-containing organic substance coating layer

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SURFACE & COATINGS TECHNOLOGY 2024年 477卷

作者： li, Jiao Zhang, Jian Zhang, Hongyu Wang, xuwen Lu, Taojie liang, Jiayan Yang, Yulin lin, Kaifeng Xia, Debin Harbin Inst Technol Sch Chem & Chem Engn MIIT Key Lab Crit Mat Technol New Energy Convers & Harbin 150001 Heilongjiang Peoples R China Harbin Inst Technol Sch Chem & Chem Engn Harbin 150001 Peoples R China

Interface modification of aluminum particles plays a crucial part in reducing the agglomeration during the combustion of solid propellants. In this study, the aluminum (Al) particles are pretreated with gallic acid (GA) to get Al@GA with an adhesion-favorable surface, which facilitates the further coating procedure. One new fluorine-containing organic substance is prepared, namely p-HFBA. The p-HFBA further coats the Al@GA to produce Al@GA/p-HFBA. The interface between Al@GA and the coating layer p-HFBA forms Al-F bonds and induces a pre-ignition reaction with an aluminum oxide shell. Hence, the agglomerate size of propellants containing Al@GA/p-HFBA significantly decreases from 176.30 mu m to 84.72 mu m. The agglomerates volume is reduced by approximately 97 %. Additionally, more gaseous products investigated by TG-MS provide the Al particles with greater impetus (aerodynamic forces, Fae), enabling them to leave the burning surface and reduce the residence time. The rise in Fae and drop in adhesion force (Fad) effectively reduce the agglomeration intensity according to the skeleton layer model. This work proves that interface modification can effectively enhance the combustion performance of aluminized solid propellants.

关键词： Interface modification Fluorine-containing organic substance Coatings Pre-ignition reaction Agglomeration Skeleton layer model

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Platelet microparticles-derived miR-25-3p promotes the hepatocyte proliferation and cell autophagy via reducing B-cell translocation gene 2

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JOURNAL OF CELLULAR BIOCHEMISTRY 2020年第12期121卷 4959-4973页

作者： Xu, Yuyuan li, Wenfei liang, Guangyu Peng, Jie Xu, xuwen Southern Med Univ Nanfang Hosp Dept Infect Dis 1838 North Guangzhou Ave Guangzhou 510515 Guandong Peoples R China

Platelets are critical regulators of liver regeneration, but the mechanisms are still not fully understood. Platelets have been shown to contain a wide variety of microRNAs (miRNAs) and play an important role in many diseases. However, the mechanism that how the platelet microparticles (PMPs)-derived miRNA regulate the hepatocyte proliferation is not very clear. In this study, we have successfully isolated and identified PMPs. We also found that PMPs, which could be well integrated into the HHL-5 cells, could upregulate the level of miR-25-3p in HHL-5 cells. Meanwhile, we found that PMPs-derived miR-25-3p promoted HHL-5 cells proliferation by accelerating cells into the S phase, and enhanced the autophagy by increasing the LC3II expression and reducing the P62 expression. Then, we proved that the miR-25-3p could target the B-cell translocation gene 2 (BTG2) and downregulate the expression levels of the BTG2 gene in HHL-5 cells. In addition, the overexpression of BTG2 significantly inhibited the proliferation and autophagy abilities of HHL-5 cells, while cotransfected miR-25-3p mimics or PMPs could partially rescue HHL-5 cells proliferation and autophagy. Furthermore, we proved that PMPs accelerated hepatocyte proliferation by regulating autophagy pathways. Therefore, PMPs-derived miR-25-3p promoted HHL-5 cell proliferation and autophagy by targeting BTG2, which may be a new therapeutic method for liver regeneration.

关键词： autophagy B-cell translocation gene 2 liver regeneration miR-25-3p platelet microparticles proliferation

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