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高校学生性及性病、艾滋病防治知识、信念和行为现状

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国外医学（医学地理分册） 2017年第1期38卷 89-91页

作者：周灿灿刘睿娜王安刘爱萍李海振赵亚玲西安交通大学医学部陕西西安710061 山东大学第二医院山东济南250033 西安交通大学医学部公共卫生学院流行病与卫生统计学系陕西西安710061

近年来,性病和艾滋病的流行范围不断扩大,发病年龄逐渐年轻化,大学生群体中性病、艾滋病感染率呈明显上升趋势,严重影响着大学生的身心健康。我国艾滋病疫情呈增长趋势,大学生已成为性病、艾滋病防治工作中不容忽视的重点人群。本文回... 详细信息

近年来,性病和艾滋病的流行范围不断扩大,发病年龄逐渐年轻化,大学生群体中性病、艾滋病感染率呈明显上升趋势,严重影响着大学生的身心健康。我国艾滋病疫情呈增长趋势,大学生已成为性病、艾滋病防治工作中不容忽视的重点人群。本文回顾总结了近年来的相关研究,以期全面了解大学生群体的性病、艾滋病防治知识、信念和行为现状,为制定相应的防治措施提供参考依据。

关键词：大学生性传播疾病艾滋病知识信念行为

Electrochemical removal of ammonium nitrogen in high efficiency and N_(2) selectivity using non-noble single-atomic iron catalyst

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Journal of Environmental Sciences 2023年第3期125卷 544-552页

作者： Fengjiao Quan Guangming Zhan Bing zhou cancan Ling Xiaobing Wang Wenjuan Shen Jianfen Li Falong Jia Lizhi Zhang College of Chemical and Environmental Engineering Wuhan Polytechnic UniversityWuhan 430023China Institute of Environmental&Applied Chemistry College of ChemistryCentral China Normal UniversityWuhan 430079China School of Chemistry and Civil Engineering Shaoguan UniversityShaoguan 512005China

Ammonia nitrogen (NH_(4)^(+)-N) is a ubiquitous environmental pollutant,especially in offshore aquaculture *** oxidation is very promising to remove NH_(4)^(+)-N,but suffers from the use of precious metals *** this work,a robust and cheap electrocatalyst,iron single-atoms distributed in nitrogen-doped carbon (Fe-SAs/N-C),was developed for electrochemical removal of NH_(4)^(+)-N from in wastewater containing *** FeSAs/N-C catalyst exhibited superior activity than that of iron nanoparticles loaded carbon(Fe-NPs/N-C),unmodified carbon and conventional Ti/IrO_(2)-TiO_(2)-RuO_(2)*** high removal efficiency (>99%) could be achieved as well as high N_(2)selectivity (99.5%) at low current *** experiments and density functional theory (DFT) calculations demonstrated the indispensable role of single-atom iron in the promoted generation of chloride derived species for efficient removal of NH_(4)^(+)-*** study provides promising inexpensive catalysts for NH_(4)^(+)-N removal in aquaculture wastewater.

关键词： Ammonia nitrogen removal Single-atom iron Non-noble metal catalyst Aquaculture wastewater

基于生物信息学分析构建肝内胆管细胞癌患者铁死亡相关lncRNA预后模型

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中华肝脏外科手术学电子杂志 2023年第2期12卷 185-189页

作者：莫建涛杨沛泽曹瑞奇马清涌王铮仵正周灿灿西安交通大学第一附属医院肝胆外科 710061

目的基于生物信息学分析建立肝内胆管细胞癌(ICC)患者的铁死亡相关长链非编码RNA(lncRNA)预后模型。方法从癌症基因组图谱(TCGA)数据库获取36例ICC和9例正常人群基因表达数据及相应临床信息,提取与预后相关的铁死亡lncRNA并构建预后模... 详细信息

目的基于生物信息学分析建立肝内胆管细胞癌(ICC)患者的铁死亡相关长链非编码RNA(lncRNA)预后模型。方法从癌症基因组图谱(TCGA)数据库获取36例ICC和9例正常人群基因表达数据及相应临床信息,提取与预后相关的铁死亡lncRNA并构建预后模型。通过Cox回归模型和ROC曲线验证铁死亡相关lncRNA预后模型的预测能力。生存分析采用Kaplan-Meier法和Log-rank检验。结果多因素Cox回归分析筛选出AL161431.1和LINC01587两个铁死亡相关lncRNA为ICC生存预后的独立预测因子(HR=2.99,7.23;P<0.05)。建立ICC患者lncRNA预后模型,风险评分=1.096×AL161431.1+1.979×LINC01587。Kaplan-Meier生存曲线显示高风险组与低风险组的总体生存期差异有统计学意义(χ2=6.54,P<0.05)。多因素Cox回归分析显示,铁死亡相关lncRNA风险评分是一个独立的预后指标(HR=1.12,P<0.05)。该模型1、2、3年生存的时间依赖性ROC曲线下面积(AUC)分别为0.883,0.837和0.853;而肿瘤分级、分期的1年生存的时间依赖性ROC曲线AUC分别为0.598、0.637,该模型生存预后预测能力明显优于肿瘤分级和分期。结论本研究构建的铁死亡相关lncRNA预测模型能有效预测ICC患者的生存。

关键词：肝内胆管细胞癌胆管肿瘤铁死亡长链非编码RNA 计算生物学

Design and test of centrifugal disc type sowing device for unmanned helicopter

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International Journal of Agricultural and Biological Engineering 2018年第2期11卷 55-61页

作者： cancan Song Zhiyan zhou Xiwen Luo Yubin Lan Xingang He Rui Ming Keliang Li Shahbaz Gul Hassan College of Engineering South China Agricultural University/Guangdong Engineering Research Center for Agricultural Aviation Application(ERCAAA)Guangzhou 510642China National Joint Research Center for Precision Agricultural Aviation Application Technology Guangzhou 510642China Key Laboratory of Key Technology on Agricultural Machine and Equipment(South China Agricultural University) Ministry of EducationGuangzhou 510642China

In China,it is difficult for manned aircraft to sow seeds in small and scattered plots,especially in areas including hills,swamps,telegraph poles,windbreaks,and residential areas;in such terrain,the sowing machinery cannot function ***,unmanned helicopters(UHs)are flexible enough to control and adapt to the complex environments that are not easily accessible by terrain sowing machinery and large agricultural aircraft,which have been widely used in *** this study,a centrifugal disc-type sowing device for an unmanned helicopter(CDTSDUH)was *** factors influencing the seed velocity when the seeds move away from the disc were explored by analyzing the forces of the seed acting on the sowing disc and the wind field of the *** influential factors include the distance from the falling mouth to the center of the disc,the offset angle of the falling mouth,and the rotation speed of the *** orthogonal test was designed with the sowing width and the curvature of the sowing area as the *** test results showed that the three factors mentioned above had a greater impact on the sowing width than the curvature of the seeding ***,the superior parameters of the disc were *** was also suggested that the above factor levels had little effect on the offset width of *** results of the test conducted for studying the sowing uniformity of the CDTSDUH indicated that the maximum and minimum difference values among the number of particles of the sampling points in the forward direction was 11 and 8,and the coefficient of variation of the number of particles in each row was more than 20%,indicating less uniformity was achieved when sowing in the lateral(perpendicular to the forward direction)direction,as compared to that in the forward *** study determined the ideal values for the radius of particles position,the offsetting angle,and the disc speed of the sowing machinery ***,considering that

关键词： sowing unmanned helicopter aircraft sowing centrifugal disc uniformity sowing disc

Laser tracking leader-follower automatic cooperative navigation system for UAVs

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International Journal of Agricultural and Biological Engineering 2022年第2期15卷 165-176页

作者： Rui Ming Zhiyan zhou Zichen Lyu Xiwen Luo Le Zi cancan Song Yu Zang Wei Liu Rui Jiang College of Engineering South China Agricultural University/Guangdong Laboratory for Lingnan Modern AgricultureGuangzhou 510642China College of Computer and Control Engineering Minjiang University/Fujian Provincial Key Laboratory of Information Processing and Intelligent ControlFuzhou 350108China Guangdong Provincial Key Laboratory for Agricultural Artificial Intelligence(GDKL-AAI) Guangzhou 510642China Guangdong Engineering Research Center for Agricultural Aviation Application(ERCAAA) Guangzhou 510642China Key Laboratory of Key Technology on Agricultural Machine and Equipment South China Agricultural UniversityMinistry of Education of P.R.ChinaGuangzhou 510642China

Currently,small payload and short endurance are the main problems of a single UAV in agricultural applications,especially in large-scale *** is one of the important methods to solve the above problems of UAVs by improving operation efficiency through multi-UAV cooperative *** study proposed a laser tracking leader-follower automatic cooperative navigation system for *** leader in the cluster fires a laser beam to irradiate the follower,and the follower performs a visual tracking flight according to the light spot at the relative position of the laser tracking *** on the existing kernel correlation filter(KCF)tracking algorithm,an improved KCF real-time spot tracking method was *** with the traditional KCF tracking algorithm,the recognition and tracking rate of the optimized algorithm was increased from 70%to 95%in indoor environment,and was increased from 20%to 90%in outdoor *** navigation control method was studied from two aspects:the distance coordinate transformation model based on micro-gyroscope and navigation control *** error of spot position was reduced from the maximum(3.12,−3.66)cm to(0.14,0.12)cm by correcting the deviation distance of the spot at different angles through a coordinate correction *** image coordinate conversion model was established for a complementary metal-oxide-semiconductor(CMOS)camera and laser receiving device at different mounting *** laser receiving device was divided into four regions,S0-S3,and the speed of the four regions is calculated using an uncontrollable discrete Kalman *** outdoor flight experiments of two UAVs were carried out outdoors using this *** experiment results show that the average flight error of the two UAVs on the X-axis is 5.2 cm,and the coefficient of variation is *** average flight error on the Z-axis is 7.3 cm,and the coefficient of variation is *** study demonstrated the possibility

关键词： two-UAVs cooperative visual navigation laser tracking

免X线超声内镜下透壁引流治疗胰腺假性囊肿的单中心回顾性分析

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中国内镜杂志 2023年第10期29卷 76-82页

作者：郝杰马坚周灿灿段万星王铮孙昊李宇陶杰杨雪董鼎辉仵正西安交通大学第一附属医院肝胆外科陕西西安710061

目的探讨免X线超声内镜下胰腺假性囊肿(PPC)透壁引流,对比传统X线引导下透壁引流的临床效果和安全性。方法回顾性分析2018年1月-2021年6月就诊于该院的33例行超声内镜下PPC透壁引流术患者的临床资料。其中,免X线组14例和X线引导组19例,... 详细信息

目的探讨免X线超声内镜下胰腺假性囊肿(PPC)透壁引流,对比传统X线引导下透壁引流的临床效果和安全性。方法回顾性分析2018年1月-2021年6月就诊于该院的33例行超声内镜下PPC透壁引流术患者的临床资料。其中,免X线组14例和X线引导组19例,比较两组患者手术成功率、手术时间和并发症发生率等。结果33例PPC患者均成功完成手术(100.00%),免X线组手术时间为(28.30±13.00)min,明显短于X线引导组的(46.79±18.00)min,差异有统计学意义(P<0.05)。免X线组2例(14.29%)出现术后并发症。其中,1例患者由于合并部分包裹性坏死,治疗后出现了感染和发热,抗感染治疗效果不理想,再次进行超声内镜下鼻胆管引流后,症状改善;另1例由于合并区域性门静脉高压症,术后出现上消化道出血,行介入治疗后,痊愈出院。X线引导组术后并发症4例(21.05%)。其中,2例因出现囊腔内感染而再次引流;2例出现上消化道出血,1例保守治疗成功,1例行开腹手术止血治疗和囊肿外引流术。结论单纯性PPC行免X线超声内镜下透壁引流术,安全、有效,手术时间短,且内镜医生能够避免X线辐射损伤,值得临床推广。

关键词：胰腺假性囊肿(PPC) 透壁引流超声内镜免X线引导手术胰腺假性囊肿引流术术后并发症

Discharge rate consistency of each channel for UAV-based pneumatic granular fertilizer spreader

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International Journal of Agricultural and Biological Engineering 2023年第4期16卷 20-28页

作者： Xunwei Wang Rui Jiang Zhiyan zhou cancan Song Xiwen Luo Ruifeng Bao Zichen Lyu Junhao Huang Jianqin Lin College of Engineering South China Agricultural University and Guangdong Laboratory for Lingnan Modern AgricultureGuangzhou 510642China Guangdong Provincial Key Laboratory of Agricultural Artificial Intelligence(GDKL-AAI) Guangzhou 510642China Guangdong Engineering Research Center for Agricultural Aviation Application(ERCAAA) Guangzhou 510642China Key Laboratory of Key Technology on Agricultural Machine and Equipment(South China Agricultural University) Ministry of EducationGuangzhou 510642China College of Agricultural Engineering and Food Science Shandong University of TechnologyZibo 255000China

Unmanned aerial vehicles(UAVs)are widely being used to spread granular fertilizer in *** fertilizer spreaders equipped with UAVs are mainly centrifugal disc-type and *** multichannel pneumatic granular fertilizer spreaders(MPGFSs)have a banded fertilizer deposition distribution pattern,which are more suitable for variable rate fertilization with high precision requirement than the circular deposition distribution pattern of disc-type granular fertilizer spreaders(DGFSs).However,the existing MPGFS has the disadvantage of inconsistent discharge rate of each channel,which affects the uniformity of *** order to explore the causes of inconsistent discharge rate of each channel,the discrete element method(DEM)and bench test were performed to analysis the discharge process of the fluted roller fertilizing apparatus and distribution of fertilizer in axial direction of fluted *** computational fluid dynamics(CFD)was used to simulate the airflow field of pneumatic system to analyze the influence of airflow on the movement of fertilizer *** simulation results of the discharge process of the fluted roller fertilizing apparatus showed that the filling velocity at the axial ends of the fluted roller fertilizing apparatus was lower than that of the *** reason was that the filling capacity was weak near the *** simulated results of the airflow field without partitions showed that the airflow provided by the axial flow fan was rotational,and this caused the particles to move irregularly in the throat,resulting in inconsistency discharge rate of each *** on the analysis of reasons of inconsistent discharge rate of each channel,a MPGFS with partitions in the throat was *** discharge rate bench tests were carried out to optimize the partition spacing parameters,and fertilization test was performed to test the performance of the improved *** discharge rate test results showed better consistency with

关键词： UAV discharge rate fertilizer spreader DEM CFD

Fish as a source of acoustic signal measurement in an aquaculture tank:Acoustic sensor based time frequency analysis

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International Journal of Agricultural and Biological Engineering 2019年第3期12卷 110-117页

作者： Shahbaz Gul Hassan Shakeel Ahmad Shafqat Iqbal Ehsan Elahi Murtaza Hasan Daoliang Li Zhiyan zhou Adnan Abbas cancan Song College of Engineering South China Agricultural University/Guangdong Engineering Research Center for Agricultural Aviation Application(ERCAAA)Guangzhou 510642China National Joint Research Center for Precision Agricultural Aviation Application Technology Guangzhou 510642China Key Laboratory of Key Technology on Agricultural Machine and Equipment(South China Agricultural University) Ministry of EducationGuangzhou 510642China College of Economics and Statistics Guangzhou UniversityGuangzhou 100083China Department of Biochemistry Biotechnology Islamia University Bahawalpur Pakistan College of Engineering China Agricultural UniversityBeijing 100083China College of Economics and Management Nanjing University of Information Science and TechnologyNanjing 210044China College of Information and Electrical Engineering China Agricultural UniversityBeijing 100083China

Acoustic signals travels rapidly in water without attenuating fish *** digital sonar and passive acoustic has been used for fish monitoring and fish ***,it is an urgent need to introduce new techniques in order to monitor the growth rate of fish during harvesting and without causing adverse effects to the harvested ***,a novel technique was introduced to probe the acoustic signal frequency ratio in absence and presence of the fish in tanks,which basically uses an acoustic sensor(hydrophone),acoustic signal processing system(scope meter),and a signal monitoring system(fluke view).Acoustic signals were selected from 48-52 Hz frequency,measure of dispersion of frequency signal represented as a function of time via Xlstat *** of dispersion displayed a significant effect of acoustic signal in the presence and absence of the fish in *** optimised protocols of this study will help to control and prevent excessive wastage of feed and enhance proper utilization of feed that chiefly enhance fish growth in aquaculture.

关键词： acoustic signals acoustic sensor fish aquaculture time frequency analysis signal processing

Test and evaluation method for endurance performance of electric multi-rotors spraying drones

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International Journal of Agricultural and Biological Engineering 2019年第2期12卷 18-28页

作者： Rui Ming Zhiyan zhou Xiwen Luo Yubin Lan Xingang He cancan Song Rui Jiang Luhong Tian Shahbaz Gul Hassan College of Engineering South China Agricultural University/Guangdong Engineering Research Center for Agricultural Aviation Application(ERCAAA)Guangzhou 510642China National Joint Research Center for Precision Agricultural Aviation Application Technology Guangzhou 510642China Key Laboratory of Key Technology on Agricultural Machine and Equipment(South China Agricultural University) Ministry of EducationGuangzhou 510642China

The endurance performance(EP)of electric multi-rotors spraying drones(EMSDs)is a key technical indicator that ensures the completion of tasks and improves their *** improve the EP of current EMSD,a test system was designed to determine the EP based on the EMSD test platform,and the performance evaluation method was ***,a test model was established to determine the equivalent energy dissipation using the performance-testing platform of the ***,a multisensory test system was *** attitude sensor,high-power DC power supply,infrared thermal imager,and serial port server were *** mounting fixture was designed to meet the universal mounting requirements of *** addition,the software LabVIEW was employed to program the code for the controller and the host computer,where functions such as data collection,data processing,communication,and graphical user interface(GUI),were performed reliably in real ***,the test method was explored by considering factors such as the power consumption,thermal efficiency ratio,and unit load power consumption *** particular,a comprehensive index method and expert consultation weight method were used to evaluate the EP of the EMSD with multiple ***,a systematic real-machine test was carried out on the three types of drones that are currently widely used in the *** results verified the effectiveness and feasibility of the proposed method,which was employed to test and evaluate the EP based on the EMSD performance testing *** the same time,it can provide a reference for the development of the EMSD.

关键词： agricultural aviation multi-rotors spraying drone endurance performance assessment method virtual instrument