Table of Content

25 September 2020, Volume 40 Issue 5

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Optimization of hospital toll window setting based on queuing theory

LI Lingyang,LI Chenyang

2020, 40(5):  449-453.  DOI: 10.3969/j.issn.1000-1565.2020.05.001

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Long waiting time in the patients payment queue can cause dissatisfaction in the patient and even cause the patients to leave the payment queuing system. Based on the study of the stochastic dynamic characteristics of the hospital charging process, a method of setting the hospital toll window based on queuing theory is proposed. With the introduction of the M/M/c/∞/∞/FCFS queuing model, a cost model of queuing system in hospital toll window was formulated. The waiting cost of the patient and the operating cost of the hospital itself are minimized, and probabilistic analysis was carried out on the basis of the optimal model. Finally, the method was tested by taking Tianjin Xiqing Hospital as an example.The results show that the hospital toll window optimization setting not only improves the patient satisfaction degree, but also improves the working efficiency of the toll staff.

Settlement deformation and prediction of loess high fill subgrade

YANG Sanqiang, DUAN Shichao, LIU Na, WU Haonan

2020, 40(5):  454-460.  DOI: 10.3969/j.issn.1000-1565.2020.05.002

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Loess high fill subgrade is prone to uneven settlement deformation. In order to better study its settlement mechanism and establish a settlement prediction mechanism and guide specific projects to ensure project safety, this article relies on the K46+500 project of the typical loess high-filled subgrade section of the ZT5 bid section of the Yanqing to Chongli Expressway in the Winter Olympics,and use the measured data from three settlement monitoring points at the site and use the logarithmic curve fitting method and hyperbola the fitting method and the power curve fitting method used to fit and analyze the measured settlement data in the field to establish a more accurate settlement prediction model. The model- DOI:10.3969/j.issn.1000-1565.2020.05.002黄土质高填方路基沉降变形与预测杨三强¹,段士超¹,刘娜¹,吴浩楠²(1.河北大学 建筑工程学院,河北省土木工程监测与评估技术创新中心 河北 保定 071002;2.河北建设集团股份有限公司 路桥公司,河北 保定 071070)摘 要:黄土质高填方路基易发生不均匀沉降变形,为了更好地研究其沉降机理以及建立沉降预测机制,指导具体工程确保工程安全,本文依托冬奥会延崇高速公路ZT5标段典型黄土高填方路基断面K46+500工程,利用现场该断面处3个沉降监测点的实测数据,通过对数曲线拟合法、双曲线拟合法和乘幂曲线拟合法对现场实测沉降数据进行拟合对比分析,得出预测精确合理的模型.通过高填方路基数值模拟计算,分析其沉降变形特点,并对沉降预测模型进行验证.研究结果表明:1)3种曲线拟合法的拟合相关系数都在0.98以上,都能对该高填方路基短期沉降做出准确预测.2)对3种预测模型的预测结果值与实测值比较分析,得出双曲线模型的预测结果值与实测值之间的误差平方和最小为4.09 mm²,预测精度最高.3)通过建立的双曲线预测模型对高填方路基沉降进行最终沉降预测,得出路基在517 d时沉降速率为0.01 mm/d,沉降达到稳定.4)利用FLAC3D的软件建模分析对比双曲线预测模型,验证了双曲线模型的可靠性.关键词:高填方路基;黄土土质;沉降监测;预测模型中图分类号:U416.1 文献标志码:A 文章编号:1000-1565(2020)05-0454-07Settlement deformation andprediction of loess high fill subgradeYANG Sanqiang¹, DUAN Shichao¹, LIU Na¹, WU Haonan²(1.Hebei Civil Engineering Monitoring and Performance Evaluation Technology Innovation Center,College of Civil Engineering and Architecture, Hebei University, Baoding 071002, China;2.Rood and Bridge Branch,Hebei Construction Group Corporation Limited,Baoding 071070, China)Abstract: Loess high fill subgrade is prone to uneven settlement deformation. In order to better study its settlement mechanism and establish a settlement prediction mechanism and guide specific projects to ensure project safety, this article relies on the K46+500 project of the typical loess high-filled subgrade section of the ZT5 bid section of the Yanqing to Chongli Expressway in the Winter Olympics,and use the measured data from three settlement monitoring points at the site and use the logarithmic curve fitting method and hyperbola the fitting method and the power curve fitting method used to fit and analyze the measured settlement data in the field to establish a more accurate settlement prediction model. The model- 收稿日期:2019-09-28 基金项目:河北大学创新资助项目(hbu2019ss019);河北省自然科学基金资助项目(E2018201106);河北省交通运输厅科技项目(TH-201925;TH-201918);河北省高层次人才资助项目(B2017005024);交通运输部科技示范项目(2016010) 第一作者:杨三强(1980—),男,四川绵阳人,河北大学教授,博士后,主要从事公路工程路基路面工程研究.E-mail:ysq0999@163.com第5期杨三强等:黄土质高填方路基沉降变形与预测of high fill roadbed is established, the characteristics of settlement and deformation are analyzed, and the established settlement prediction model is verified. The research results show that: 1)The fitting correlation coefficients of the three curve fitting methods are all above 0.98, which can accurately predict the short-term settlement of the high-filled subgrade. 2)By comparing and analyzing the prediction results of the three prediction models and the measured values, it is found that the minimum error sum of squares between the predicted results and the measured values of the hyperbolic model is 4.09 mm², and the prediction accuracy is the highest. 3)Based on the established hyperbolic prediction model, the final settlement prediction of the settlement of high-filled subgrade is carried out, and it is concluded that the settlement rate of the subgrade is 0.01mm/d at 517 days, and the settlement is stable. 4)By using FLAC3D software to analyze and compare the hyperbolic prediction model to verify the reliability of the hyperbolic model.

Mechanical characteristics of foundation pit excavation of super high-rise building in weathered sandstone area

YU Li,JIANG Zongxin,YAN Minghui,ZHAO Tuo

2020, 40(5):  461-468.  DOI: 10.3969/j.issn.1000-1565.2020.05.003

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The excavation of deep foundation pit of natural foundation of super high-rise building in weathered sandstone area of Lanzhou is the first foundation pit excavation project of natural foundation in Gansu Province. The mechanical characteristics of foundation pit excavation are affected by excavation method, soil layer and mechanical properties. In this paper, triaxial test and finite element numerical simulation are used to analyze the change of surrounding mechanical properties caused by foundation pit excavation in this area. The shear strength parameters of weathered sandstone are obtained by triaxial test, and the three-dimensional numerical model of foundation pit excavation is established by using finite element numerical simulation software. The stress and deformation curves in the process of foundation pit excavation are obtained. The simulation results are compared with the current specifications, and the feasibility scheme of foundation pit excavation is obtained, which provides reference for similar projects in the future.- DOI:10.3969/j.issn.1000-1565.2020.05.003风化砂岩地区超高层建筑基坑开挖的力学特征余莉^1,2,3,蒋宗鑫⁴,闫名卉³,赵拓¹(1.河北省建筑科学研究院有限公司,河北 石家庄 050000;2.石家庄铁道大学 土木工程学院,河北 石家庄 050043;3.河北大学 建筑工程学院,河北 保定 071002;4.甘肃中建市政工程勘察设计研究院有限公司,甘肃 兰州 730000)摘 要:兰州市风化砂岩地区超高层建筑天然地基的深基坑开挖是甘肃省首项天然地基的基坑开挖工程,其开挖方式、土层情况、力学性质等不同程度地影响着基坑开挖的力学特征.本文采用三轴实验和有限元数值模拟,分析该地区基坑开挖引起周围力学性质的变化情况.通过三轴实验获取风化砂岩的剪切强度参数,利用有限元数值模拟软件建立基坑开挖的三维数值模型,得到基坑开挖过程中的应力和变形曲线,并将模拟结果与现行规范进行对比分析,得到基坑开挖的可行性方案,为以后的类似工程提供参考意见.关键词:强风化砂岩;基坑开挖;数值模拟;变形中图分类号:TU44 文献标志码:A 文章编号:1000-1565(2020)05-0461-08Mechanical characteristics of foundation pit excavation of super high-rise building in weathered sandstone areaYU Li^1,2,3,JIANG Zongxin⁴,YAN Minghui³,ZHAO Tuo¹(1. Hebei Academy of Building Sciences Co., Ltd., Shijiazhuang 050000,China; 2.School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;;3.College of Civil Engineering and Architecture, Hebei University, Baoding 071002, China;4.Gansu Zhongjian Municipal Engineering Survey Design and Research Institute Co., Ltd.,Lanzhou 730000,China)Abstract: The excavation of deep foundation pit of natural foundation of super high-rise building in weathered sandstone area of Lanzhou is the first foundation pit excavation project of natural foundation in Gansu Province. The mechanical characteristics of foundation pit excavation are affected by excavation method, soil layer and mechanical properties. In this paper, triaxial test and finite element numerical simulation are used to analyze the change of surrounding mechanical properties caused by foundation pit excavation in this area. The shear strength parameters of weathered sandstone are obtained by triaxial test, and the three-dimensional numerical model of foundation pit excavation is established by using finite element numerical simulation software. The stress and deformation curves in the process of foundation pit excavation are obtained. The simulation results are compared with the current specifications, and the feasibility scheme of foundation pit excavation is obtained, which provides reference for similar projects in the future.- 收稿日期:2019-04-27 基金项目:河北省教育厅青年拔尖人才资助项目(BJ2018046) 第一作者:余莉(1985—),女,四川安县人,河北大学副教授,博士后,主要从事岩土工程方面的研究.E-mail:964630415@qq.com 通信作者:闫名卉(1993—),女,河北唐山人,河北大学在读硕士研究生,主要从事岩土工程方面的研究. E-mail:2803530599@qq.com第5期余莉等:风化砂岩地区超高层建筑基坑开挖的力学特征

Research progress of quantum dot-sentitized solar cells

LI Ling, MA Zeyuan, LI Zixiang, WEI Aichao, LI Fan, ZHANG Yikang, ZHAO Yajun

2020, 40(5):  469-476.  DOI: 10.3969/j.issn.1000-1565.2020.05.004

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Quantum dots sensitized solar cells have received much attention because of its many advantages(such as straight forward synthesis procedure, low spending and superior theoretical photoelectric conversion property), the highest efficiency has exceeded 13%.The performance of the solar cell is mainly caused by the photoanode, the counter electrode and the electrolyte. Therefore, optimizing the above parts can greatly improve the cells performance. This paper introduces the structure, working principle and the latest research progress of quantum dot sensitized solar cells. The current research results and existing problems of photoanodes are reviewed, and the optimization of photoanodes is further prospected.

Effect of Majorana bound states on transport properties of normal metal/triple quantum dots/superconductor structure

QIN Fang,SUN Yanxiu,WANG Suxin

2020, 40(5):  477-483.  DOI: 10.3969/j.issn.1000-1565.2020.05.005

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Andreev reflection can occur in normal metal/quantum dots/superconductor structures. If the Majorana bound states(MBSs)are coupled to the quantum dots of the structure, the Andreev reflected conductance will change in a special way and can be used to detect MBSs.In this paper, the effect of MBSs on the transport properties of linear triple quantum dots connected between normal metal and superconductor is studied.It is found that the Andreev reflection conductance at zero Fermi energy is always equal to 0.5 G₀(G₀=2e²/h)without considering the coupling between MBSs. And it is not affected by the quantum dot energy level, the coupling strength between quantum dots, and the coupling strength between quantum dots and electrodes, and it has obvious robustness.

Research progress on the removal method and mechanism of tetrabromobisphenol A

GONG Yichao,LIU Pengyan,LIU Guisui

2020, 40(5):  484-493.  DOI: 10.3969/j.issn.1000-1565.2020.05.006

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Tetrabromobisphenol A(TBBPA), an emerging contaminant, is a common bromine-based flame retardant(BFRs)widely found in plastics, textiles and electronic components. Since TBBPA is added as a non-reactive additive to the product, it is easy to spread into the environment. Because of its persistence, biotoxicity and accumulation, it poses a serious threat to the ecological environment and human health. Therefore, the removal of TBBPA in the environment has become a hot issue. At home and abroad, the methods and mechanisms of adsorption, thermal degradation, photodegradation and catalytic degradation of TBBPA were reviewed and compared, and the existing problems and future research directions were discussed and prospected.

Preparation of abiraterone cyclodextrin inclusion complex tablets

TANG Huayang,LI Jianheng,XU Feng

2020, 40(5):  494-499.  DOI: 10.3969/j.issn.1000-1565.2020.05.007

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To study the best technie of the abiraterone-2- hydroxypropyl-β-cyclodextrin inclusion complex tablets. Orthogonal experiment was used to select of the best preparation technology by using the time limit of the disintegrating of vegetarian tablets as the investigation index. Best preparation of tablets are lactose 15 g, the amount of crosslinked sodium carboxymethylcellulose 1 g, 3%(g/g)binder. This method of preparation of the abiraterone-2-hydroxypropyl-β-cyclodextrin inclusion complex tablets is reasonable and reliable.

Analysis and determination of the main components in the four medicinal materials of Yinzhihuang formula by HPLC

ZHANG Yushan, SUN Yifei, LUO Li, LI Zuoming, ZHANG Shanzi, YAO Xincheng

2020, 40(5):  500-509.  DOI: 10.3969/j.issn.1000-1565.2020.05.008

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The chemical constituents of the standard extracts of the four medicinal materials in Yinzhihuang formula were analyzed by HPLC, and determined the content of chlorogenic acid, 1,3-dicaffeoylquinic acid, isochlorogenic acid B, isochlorogenic acid A, isochlorogenic acid C, geniposide, baicalin, wogonin, baicalein, wogonoside, oroxylin A, and neochlorogenic acid. The separation was carried out on a Diamonsil C₁₈(250 mm×4.6 mm,5 μm)column, and gradient eluted with the mobile phase of acetonitrile(A)-0.1% formic acid aqueous solution(B)with 1.0 mL/min. The column temperature was set at 30 ℃. The main components in the four standard medicinal extracts of Yinzhihuang formula can be separated in the chromatographic conditions. Precision, repeatability, and stability were good, and the average recoveries were between 98.84%~102.22%. The developed method was simple and effective for the determination of the components in the four medicinal materials, and the result is accurate and reliable, it can provide a reference for the Yinzhihuang formulation of the quality standard of medicinal extracts and a basis for the analysis of the main chemical components.

Preparation of graphite oxide by an improved low temperature Hummers method

YIN Bo

2020, 40(5):  510-515.  DOI: 10.3969/j.issn.1000-1565.2020.05.009

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The purpose of this paper is to explore whether Hummers method can obtain graphite oxide with good degree of oxidation at low temperature.In this paper, a new Hummers method which is safe and effective at low temperature is studied based on the principle of gravity deposition.Through exploring the influence of five factors, such as low temperature, medium temperature, high temperature time, high temperature and potassium permanganate dose ratio, on the degree of graphite oxidation.A simple and reasonable Hummers method was finally obtained by adopting a new method of impurity removal.The experimental results show that a good oxidation ratio can be prepared at 45 ℃.

Species diversity of rotifer and the trophic state of Baiyangdian Lake

LI Jiahao,YANG Chen,MA Le,CUI Siqi,KANG Xianjiang,XIAO Guohua,LI Fengchao

2020, 40(5):  516-526.  DOI: 10.3969/j.issn.1000-1565.2020.05.010

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In May(spring), August(summer)and October(autumn)of 2018, the rotifer diversity, community structure and the environmental factors, namely water temperature(WT), dissolved oxygen(DO), pH, water depth(WD), water transparency(Tr), total nitrogen(TN), total phosphorus(TP)and chlorophyll-a(Chla)at 26 sampling sites in Baiyangdian Lake were investigated. The relationship between the rotifer community parameters and environmental factors was analyzed, and the eutrophication degree of Baiyangdian Lake was also evaluated. A total of 61 rotifer species were identified in this survey, Brachionus calyciflorus, B. angularis and Polyarthra minor were the main dominant species throughout the - DOI:10.3969/j.issn.1000-1565.2020.05.010白洋淀轮虫群落结构及富营养化评价李佳豪^1,2,杨辰^1,2,马乐^1,2,崔思琪^1,2,康现江^1,2,肖国华³,李凤超^1,2,4(1.河北大学 生命科学学院,河北 保定 071002; 2.河北大学 生命科学与绿色发展研究院,河北 保定 071002;3.河北省海洋与水产科学研究院 河北省海洋生物资源与环境重点实验室,河北 秦皇岛 066200;4.河北省动物系统学与应用重点实验室,河北 保定 071002)摘 要:于2018年5月(春)、8月(夏)和10月(秋)对白洋淀26个采样点轮虫物种组成和群落结构进行了系统调查,测定了水温(WT)、溶解氧(DO)、pH值、水深(WD)、透明度(Tr)、总氮(TN)、总磷(TP)、叶绿素a(Chla)等环境因子,分析了轮虫群落参数与环境因子的关系,综合评价了白洋淀水体富营养化程度.共鉴定出轮虫21属61种,以耐污性种类为主,角突臂尾轮虫、萼花臂尾轮虫和小多肢轮虫为优势种.各采样点轮虫种数差异较大,最多为20种(聚龙淀),最少仅为6种(大麦淀).轮虫平均丰度和生物量呈现明显的季节变化,秋季最高(3 372 ind./L,0.90 mg/L),夏季其次(1 240 ind./L,0.88 mg/L),春季最低(210 ind./L,0.22 mg/L);轮虫最高丰度为6 930 ind./L(三角淀,秋季),最低仅为2 ind./L(平阳淀,夏季).Shannon-Wiener多样性指数(H')和Pielou均匀度指数(J)夏季最高(分别为2.30和0.86).经相关性分析发现,轮虫丰度与DO、WD、Chla、TP呈显著正相关,而与Tr显著负相关;轮虫种数与WD显著正相关,与WT显著负相关.与历史资料相比,白洋淀水质在一定程度有所好转,但仍处于富营养化状态.关键词:白洋淀;轮虫;物种组成;富营养化评价中图分类号:S932.8 文献标志码:A 文章编号:1000-1565(2020)05-0516-11Species diversity of rotifer and the trophic state of Baiyangdian LakeLI Jiahao^1,2,YANG Chen^1,2,MA Le^1,2,CUI Siqi^1,2,KANG Xianjiang^1,2,XIAO Guohua³,LI Fengchao^1,2,4(1.College of Life Sciences,Hebei University,Baoding 071002,China;2.Institute of Life Science and Green Development, Hebei University, Baoding 071002, China;3.Key Laboratory of Marine Biological Resources and Environment of Hebei Province,Hebei Institute of Marine and Fishery Sciences,Qinhuangdao 066200,China;4.Key Laboratory of Zoological Systematics and Application,Baoding 071002,China)Abstract: In May(spring), August(summer)and October(autumn)of 2018, the rotifer diversity, community structure and the environmental factors, namely water temperature(WT), dissolved oxygen(DO), pH, water depth(WD), water transparency(Tr), total nitrogen(TN), total phosphorus(TP)and chlorophyll-a(Chla)at 26 sampling sites in Baiyangdian Lake were investigated. The relationship between the rotifer community parameters and environmental factors was analyzed, and the eutrophication degree of Baiyangdian Lake was also evaluated. A total of 61 rotifer species were identified in this survey, Brachionus calyciflorus, B. angularis and Polyarthra minor were the main dominant species throughout the - 收稿日期:2019-07-26 基金项目:农业部白洋淀水生生物资源环境调查及水域生态修复示范项目(2130111);国家自然科学基金资助项目(31872206);河北省留学归国人员项目(C201801) 第一作者:李佳豪(1995—),男,河北廊坊人,河北大学在读硕士研究生,主要从事水生生物学研究.E-mail:1094160494@qq.com 通信作者:李凤超(1970—),男,河北乐亭人,河北大学教授,主要从事水生生物学研究.E-mail:lifengchao2000@sina.com第5期李佳豪等:白洋淀轮虫群落结构及富营养化评价year. The distribution of rotifer species at each sampling site is significantly different, with a maximum of 20 species(Julongdian)and a minimum of only 6 species(Damaidian). The average abundance and biomass of rotifers showed obvious seasonal changes, the highest in autumn(3 372 ind./L, 0.90 mg/L), the second in summer(1 240 ind./L, 0.88 mg/L), and the lowest in spring(210 ind./L, 0.22 mg/L), the highest abundance was 6 930 ind./L(Sanjiaodian, autumn), and the lowest was only 2 ind./L(Pingyangdian, summer). The Shannon-Wiener diversity index(H')and evenness index(J)have the highest average values in summer, Which were 2.30 and 0.86, respectively. Correlation analysis showed that rotifer abundance was significantly positively correlated with DO, WD, Chla, and TP, and significantly negatively correlated with Tr; the number of rotifer species was significantly positively correlated with WD, and significantly negatively correlated with WT. Comparing with previous data, the water quality of Baiyangdian Lake is better but still in a state of eutrophication.

Qualities and antioxidant activities of lotus leaves in different regions of Baiyangdian Lake

GUO Chunyan, CHU Jianzhou, XUE Jingjing, GUO Chenchen, SHEN Yuxiao, YAO Xiaoqin

2020, 40(5):  527-535.  DOI: 10.3969/j.issn.1000-1565.2020.05.011

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In order to explore the differences in quality and antioxidant activities of lotus leaves in different regions of Baiyangdian Lake, this work studied the lotus leaves in seven representative regions of Baiyangdian Lake.The results demonstrated that there were significant differences in the physiological traits,active and nutritional ingredients and antioxidant activities of the lotus leaves in different regions of Baiyangdian Lake: The lotus leaves in the Yangzhuangzi and Shaochedian regions had higher contents of active ingredient;The lotus leaves in the Shaochedian region had higher contents of protein and vitamin C,and the soluble sugar and protein contents in lotus leaves were higher in Guolikou region than that in the other regions;The lotus leaves in the Datianzhuang region had higher activities in 1,1-diphenyl-2-picrylhydrazyl(DPPH)radical scavenging and O^-₂ radical scavenging activity.Comprehensive analysis revealed that the lotus leaves in the Shaochedian and Datianzhuang sampling points had higher qualities and stonger antioxidant activities.This results of this study provided a theoretical basis for selecting the optimal picking region of lotus leaves in Baiyangdian Lake.- DOI:10.3969/j.issn.1000-1565.2020.05.011白洋淀不同区域荷叶品质和抗氧化性差异郭春延¹,楚建周^1,2,薛晶晶¹,郭臣臣¹,申雨肖¹,姚晓芹^1,2,3(1.河北大学 生命科学学院,河北 保定 071002;2.河北大学 生命科学与绿色发展研究院,河北 保定 071002;3.河北省湿地生态与保护重点实验室(筹),河北 衡水 053000)摘 要:为探究白洋淀不同区域荷叶品质和抗氧化性的差异,对白洋淀7个有代表性采样点的荷叶进行了研究.实验结果表明,白洋淀7个采样点荷叶的品质和抗氧化性差异明显:杨庄子和烧车淀采样点的荷叶活性成分含量较高;烧车淀采样点的荷叶蛋白和维生素C含量较高,郭里口采样点的荷叶可溶性糖和蛋白含量较高;而大田庄采样点的荷叶具有较强的1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)和O^-₂自由基清除活性.因此,综合分析表明,烧车淀和大田庄采样点的荷叶均具有较高的品质和较强的抗氧化性.关键词:白洋淀;荷叶;活性成分;营养成分;抗氧化性中图分类号:R282 文献标志码:A 文章编号:1000-1565(2020)05-0527-09Qualities and antioxidant activities of lotus leaves in different regions of Baiyangdian LakeGUO Chunyan¹, CHU Jianzhou^1,2, XUE Jingjing¹, GUO Chenchen¹, SHEN Yuxiao¹, YAO Xiaoqin^1,2,3(1.College of Life Sciences, Hebei University, Baoding 071002, China; 2.Institute of Life Science and Green Development, Hebei University, Baoding 071002, China; 3. Hebei Key Laboratory of Wetland Ecology and Conservation,Hengshui 053000, China)Abstract: In order to explore the differences in quality and antioxidant activities of lotus leaves in different regions of Baiyangdian Lake, this work studied the lotus leaves in seven representative regions of Baiyangdian Lake.The results demonstrated that there were significant differences in the physiological traits,active and nutritional ingredients and antioxidant activities of the lotus leaves in different regions of Baiyangdian Lake: The lotus leaves in the Yangzhuangzi and Shaochedian regions had higher contents of active ingredient;The lotus leaves in the Shaochedian region had higher contents of protein and vitamin C,and the soluble sugar and protein contents in lotus leaves were higher in Guolikou region than that in the other regions;The lotus leaves in the Datianzhuang region had higher activities in 1,1-diphenyl-2-picrylhydrazyl(DPPH)radical scavenging and O^-₂ radical scavenging activity.Comprehensive analysis revealed that the lotus leaves in the Shaochedian and Datianzhuang sampling points had higher qualities and stonger antioxidant activities.This results of this study provided a theoretical basis for selecting the optimal picking region of lotus leaves in Baiyangdian Lake.- 收稿日期:2019-04-21 基金项目: 国家自然科学基金资助项目(31300321);河北省自然科学基金资助项目(C2012201080);河北省湿地生态与保护重点实验室(筹)开放基金资助项目(hklk201904) 第一作者: 郭春延(1991—),女,河北邢台人,河北大学在读硕士研究生.E-mail: 1076568696@qq.com 通信作者: 姚晓芹(1978—),女,河北邯郸人,河北大学教授,主要从事植物生理生态学研究. E-mail: yaoxiao301@126.com第5期郭春延等:白洋淀不同区域荷叶品质和抗氧化性差异

Water quality assessment of Fuhe River based on periphyton diversity and trophic level index

ZHANG Qi, YUAN Bo, ZHOU Jing, ZHU Zhenni, XIAO Guohua, LIU Cunqi

2020, 40(5):  536-542.  DOI: 10.3969/j.issn.1000-1565.2020.05.012

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As one of the most important water supply river of Baiyangdian Lake, the water quality of Fuhe River has a direct impact on Baiyangdian Lake, so the monitoring of Fuhe River plays an important role for the protection and management of Baiyangdian Lake. In order to understand the temporal and spatial changes of Fuhe Rivers water quality, the diversity of periphyton community was investigated in 10 sampling sites in Fuhe River and one sampling site as the reference in Baiyangdian Lake(Shihoudian Lake). To understand the water quality variation of in Fuhe River, the survey was carried out in spring, summer and autumn of 2016.The results showed that:1)A total of 147 species(genus)belonging to 6 phyla were- DOI:10.3969/j.issn.1000-1565.2020.05.012基于附着藻类多样性和TLI的府河水质评价张琪¹,苑博¹,周静¹,朱珍妮¹,肖国华²,刘存歧¹(1.河北大学 生命科学学院,河北 保定 071002;2. 河北省海洋生物资源与环境重点实验室,河北 秦皇岛 066200)摘 要:府河是白洋淀重要的源头河流,其水质直接影响白洋淀水质的优劣.为了了解府河水质的时空变化,2016年4月至11月在府河设置10个采样点,在白洋淀的鲥鯸淀设置1个采样点,对府河附着藻类多样性进行了调查研究,并对府河的水质进行了综合营养评价,分析了其对白洋淀水质的潜在影响. 结果表明:1)府河附着藻类以硅藻门、绿藻门和蓝藻门种类为优势种,共计6门147种(属).从时间维度上,夏季分布最多,秋季分布最少.从空间维度上,鲥鯸淀采样点的种类最多,东湖采样点的种类最少;2)府河附着藻类的Shannon-Wiener多样性指数(H')和Margalef多样性指数(M)具有一致的变化趋势,夏季普遍高于春秋两季,而Pielou均匀度指数(J)秋季较高,H'、M和J最高值均出现在鲥鯸淀采样点,H'和M最低值均出现在望亭采样点,J最低值出现在东湖采样点;3)综合营养状态指数(TLI)表明,春季和夏季水体中以轻度富营养化的水体为主,秋季水体主要以中营养程度为主.从空间维度上看,北湖和鲥鯸淀采样点的TLI普遍较低.不同的评价方法对府河水质的评价结果基本一致.府河水质随季节和空间变化的现象明显,秋季水质最优,春季水质最差,上游水质最差,北湖水质最好.本研究利用2种评价方法对府河水质进行了评价,为府河和白洋淀生态修复提供了基础数据和理论支持.关键词:府河;附着藻类;多样性指数;水质评价 中图分类号:Q145 文献标志码:A 文章编号:1000-1565(2020)05-0536-07Water quality assessment of Fuhe River based on periphyton diversity and trophic level indexZHANG Qi¹, YUAN Bo¹, ZHOU Jing¹, ZHU Zhenni¹, XIAO Guohua², LIU Cunqi¹(1.College of Life Sciences,Hebei University,Baoding 071002,China;2.Key Laboratory of Marine Living Resources and Environment of Hebei Provience,Qinhuangdao 066200,China)Abstract: As one of the most important water supply river of Baiyangdian Lake, the water quality of Fuhe River has a direct impact on Baiyangdian Lake, so the monitoring of Fuhe River plays an important role for the protection and management of Baiyangdian Lake. In order to understand the temporal and spatial changes of Fuhe Rivers water quality, the diversity of periphyton community was investigated in 10 sampling sites in Fuhe River and one sampling site as the reference in Baiyangdian Lake(Shihoudian Lake). To understand the water quality variation of in Fuhe River, the survey was carried out in spring, summer and autumn of 2016.The results showed that:1)A total of 147 species(genus)belonging to 6 phyla were- 收稿日期:2019-12-24 基金项目:河北省海洋生物资源与环境重点实验室开放基金资助项目(HBSHZ2018k002);生态环境部生物多样性调查评估项目(2019HJ2096001006) 第一作者:张琪(1995—),女,山东枣庄人,河北大学在读硕士研究生.E-mail:474312601@qq.com 通信作者:刘存歧(1967—),男,河北昌黎人,河北大学教授,主要从事水域生态学研究.E-mail:liucunqi@sina.com第5期张琪等:基于附着藻类多样性和TLI的府河水质评价found, dominated by phylum diatom, phylum chlorella and phylum cyanophyta. From the temporal dimension, the species number was the most in summer, and the least in autumn. From spatial dimension, periphyton species number was the most in Shihoudian Lake and the least in the East Lake. 2)The Shannon-Wiener index(H')and Margalef index(M)of periphyton in Fuhe River showed the same changing trend, which was generally higher in summer than in spring and autumn, while the Pielou index(J)was higher in autumn. H', M and J index were highest in Shihoudian Lake, and the lowest in Wangting. 3)Trophic level index(TLI)method was used to estimate Fuhe Rivers eutrophication level, which indicated that the water was slightly eutrophicated in spring and summer, while Mesotrophic in autumn, the TLI index in Northern Lake and Shihoudian Lake were generally lower. By using different methods to evaluate the water quality of Fuhe River, and the results were basically the same. As the heterogeneity occurs, the water quality changed obviously. It was best in autumn while worst in spring in time, and in space,it was best in Bei Lake while worst in upstream of Fuhe River. Two methods were used to evaluate the water quality of Fuhe River, which provided basic data and theoretical support for the ecological restoration of Fuhe River and Baiyangdian Lake.

Pathological image classification algorithm by improved PSO-optimized SVM

DONG Bin,WANG Yuntao,JIA Linan,WANG Yanan

2020, 40(5):  543-551.  DOI: 10.3969/j.issn.1000-1565.2020.05.013

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In order to improve the accuracy of medical pathological image classification, a PSO parameter optimization algorithm with adaptive iterative optimization function is proposed.First, a position updating strategy based on the adaptive principle is proposed on the basis of the classical PSO algorithm.Then, an adaptive iterative optimization function is designed in the process of particle parameter optimization.The algorithm can search for optimal solution without considering the influence of speed.Finally, the PSO optimized support vector machine algorithm is used to classify and detect pathological images.The experimental results show that the classification accuracy of the algorithm is 98.5%, which is higher than that of the other two algorithms.The results of classified detection are in accordance with the results of clinical diagnosis and meet the requirements of medical research.

Personalized recommendation algorithm based on multi-perspective trust

REN Zhibo, WANG Yawen, WEI Xiangyu, GUAN Chengkang

2020, 40(5):  552-560.  DOI: 10.3969/j.issn.1000-1565.2020.05.014

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By giving the adaptive weight to the users trust in project score data and social trust, a comprehensive personalized recommendation algorithm combining multi-view trust and probability matrix decomposition was proposed to improve the recommendation accuracy. The algorithm was verified on the Filmtrust dataset. The results showed that the proposed algorithm was effectively improved on both MAE(mean absolute error)and RMSE(root mean squared error)indicators compared with related algorithms.