Winter Wheat Yield Estimation Based on Sparrow Search Algorithm Combined with Random Forest:A Case Study in Henan Province,China

Precise and timely prediction of crop yields is crucial for food security and the development of agricultural policies.However,crop yield is influenced by multiple factors within complex growth environments.Previous research has paid relatively little attention to the interference of environmental factors and drought on the growth of winter wheat.Therefore,there is an urgent need for more effective methods to explore the inherent relationship between these factors and crop yield,making precise yield prediction increasingly important.This study was based on four type of indicators including meteorological,crop growth status,environmental,and drought index,from October 2003 to June 2019 in Henan Province as the basic data for predicting winter wheat yield.Using the sparrow search al-gorithm combined with random forest(SSA-RF)under different input indicators,accuracy of winter wheat yield estimation was calcu-lated.The estimation accuracy of SSA-RF was compared with partial least squares regression(PLSR),extreme gradient boosting(XG-Boost),and random forest(RF)models.Finally,the determined optimal yield estimation method was used to predict winter wheat yield in three typical years.Following are the findings:1)the SSA-RF demonstrates superior performance in estimating winter wheat yield compared to other algorithms.The best yield estimation method is achieved by four types indicators’composition with SSA-RF)(R^(2)=0.805,RRMSE=9.9%.2)Crops growth status and environmental indicators play significant roles in wheat yield estimation,accounting for 46%and 22%of the yield importance among all indicators,respectively.3)Selecting indicators from October to April of the follow-ing year yielded the highest accuracy in winter wheat yield estimation,with an R^(2)of 0.826 and an RMSE of 9.0%.Yield estimates can be completed two months before the winter wheat harvest in June.4)The predicted performance will be slightly affected by severe drought.Compared with severe drought year(2011)(R^(2)=0.680)and normal year(2017)(R^(2)=0.790),the SSA-RF model has higher prediction accuracy for wet year(2018)(R^(2)=0.820).This study could provide an innovative approach for remote sensing estimation of winter wheat yield.yield.

Preface to the Special Collection on the July 2021 Zhengzhou, Henan Extreme Rainfall Event

A period of extreme rainfall occurred from 17 to 22 July 2021 in Henan Province of China where the accumulated precipitation in the 6-day period exceeded 1000 mm, which is more than the mean annual precipitation in the region. The rainfall was particularly intense on 20 July 2021, especially over Zhengzhou City, the capital of Henan Province and home to more than 10 million people. Hourly rainfall of 201.9 mm was measured at a station in Zhengzhou, breaking the station hourly rainfall record for all of China's Mainland. Major urban flooding occurred in Zhengzhou, leading to submerged subway trains and city road tunnels.

Assimilation of the FY-4A AGRI Clear-Sky Radiance Data in a Regional Numerical Model and Its Impact on the Forecast of the“21·7”Henan Extremely Persistent Heavy Rainfall

Assimilation of the Advanced Geostationary Radiance Imager(AGRI)clear-sky radiance in a regional model is performed.The forecasting effectiveness of the assimilation of two water vapor(WV)channels with conventional observations for the“21·7”Henan extremely heavy rainfall is analyzed and compared with a baseline test that assimilates only conventional observations in this study.The results show that the 24-h cumulative precipitation forecast by the assimilation experiment with the addition of the AGRI exceeds 500 mm,compared to a maximum value of 532.6 mm measured by the national meteorological stations,and that the location of the maximum precipitation is consistent with the observations.The results for the short periods of intense precipitation processes are that the simulation of the location and intensity of the 3-h cumulative precipitation is also relatively accurate.The analysis increment shows that the main difference between the two sets of assimilation experiments is over the ocean due to the additional ocean observations provided by FY-4A,which compensates for the lack of ocean observations.The assimilation of satellite data adjusts the vertical and horizontal wind fields over the ocean by adjusting the atmospheric temperature and humidity,which ultimately results in a narrower and stronger WV transport path to the center of heavy precipitation in Zhengzhou in the lower troposphere.Conversely,the WV convergence and upward motion in the control experiment are more dispersed;therefore,the precipitation centers are also correspondingly more dispersed.

Preface to the Special Issue Celebrating the 100th Anniversary of the Founding of Mathematics at Henan University

The journey of mathematics at Henan University traces back to the inception of the Department of Mathematics and Physics at Zhongzhou University in 1923.Over the course of a century,scholars across generations have shared their aspirations with our nation,shaping the destiny of our country.Through unwavering dedication,they have continuously enhanced the quality of mathematical education and laid the groundwork for an enduring academic legacy.

Analysis of Rainstorm Process over Henan Province of China in July 2021

Based on the data from the China National Meteorological Station and the fifth-generation reanalysis data of the European Center for Medium-Range Weather Forecasts, we investigated and examined the precipitation, circulation, and dynamic conditions of the rainstorm in Henan in July 2021. The results show that: 1) This precipitation is of very heavy rainfall level, beginning on the 19th and lasting until the 21st, with a 3-hour cumulative precipitation of more than 200 mm at Zhengzhou station at 19:00 on the 20th. The major focus of this precipitation is in Zhengzhou, Henan Province, and it also radiates to Jiaozuo, Xinxiang, Kaifeng, Xuchang, Pingdingshan, Luoyang, Luohe, and other places. 2) The Western Pacific Subtropical High (WPSH), typhoons “In-Fa” and “Cempaka”, as well as the less dynamic strengthening of the Eurasian trough ridge structure, all contributed to the short-term maintenance of the favorable large-scale circulation background and water vapor conditions for this rainstorm in Henan. 3) The vertical structure of low-level convergence and high-level dispersion near Zhengzhou, together with the topographic blocking and lifting impact, produced favorable dynamic lifting conditions for this rainstorm.

Analysis of Extreme Precipitation Weather Process in Henan during July 17-22, 2021

To learn more about the unusually heavy rainfall in central China, this research uses the monthly climatic data, weather map information and US NCEP re-analysis data to analyze the atmospheric circulation, precipitation and weather situation of this extreme precipitation weather process in Henan during July 17-22, 2021. The results show that the precipitation process is affected by the joint action of the subtropical high, the continental high, the low vortex, the low-level jet, the typhoon “In-fa” and other multi-scale systems in the middle and low latitudes. This precipitation process was also affected by the topographic uplift and blocking of Taihang Mountain and Funiu Mountain.

Spatiotemporal Evolution and Influencing Factors of Urban-rural Construction Land in Rural Industrialized Areas in China:Case Studies in Changyuan City and Xinxiang County of Henan Province

Since China’s reform and opening up in 1978,the acceleration of industrialization and urbanization in China had led to dramatic changes in the pattern of urban-rural land use.In this paper,we focused on the rural industrialized areas in central China(Xinxiang County and Changyuan City of Henan Province).We used the average nearest neighbor index,spatial statistical analysis,and a structural equation model to analyze the spatiotemporal evolution and influencing factors of urban-rural construction land based on multisource spatial data and survey data.The results showed that:1)from 1975 to 2019,the spatial distribution of urban-rural construction land in rural industrialized areas had evolved from homogeneous distribution to local agglomeration.In terms of comparative analysis of cases,the spatial distribution of urban-rural construction land in Changyuan City had shown a trend from diffusion to agglomeration,and Xinxiang County had overall shown a spatial change from homogenization to agglomeration and then to regional integration development.2)The hot spots with increased urban-rural construction land significantly expanded,and they had a high degree of spatial overlap with industrial development.Among them,Xinxiang County was concentrated in central and marginal areas,and Changyuan was mainly concentrated in central urban areas.3)From the evolution of spatial proximity of urban-rural construction land,rural industrialized areas generally decline,showing the characteristics of internal differentiation in the rate of change.4)Industrial development,social economy,the policy environment,and urban development played a positive role in promoting the expansion of urban-rural construction land in rural industrialized areas.To promote the optimal use of regional land and the integrated development of urban-rural areas,we should combine the advantages of regional endowment,formulate development strategies according to local conditions,and adjust the way that land is used in a timely manner.

Trend, Mechanism and Path: Analysis of the Integrated Development of Henan Intangible Cultural Heritage and Tourist Industry with Digital Empowerment

Up till now,Henan has established a relatively perfect Intangible Cultural Heritage listing system and protection system,which lays a foundation for the digitalization of Intangible Cultural Heritage.Meanwhile,Henan has vigorously carried out research on the activation of digital Intangible Cultural Heritage,resulting in improving the capabilities of digital application of Intangible Cultural Heritage.

Traveling to Henan,Understanding China

From July 30 to August 5,2023,the Yellow River Tourism Overseas Promotion Season 2023 launched the"Henan Overseas Promotion Week",presenting to the global public"Traveling to Henan,Understanding China-Henan Province Characteristic Tourism Cultural Resources Photo Exhibition"and"Traveling to Henan.

Campus Landscape and Campus Culture of Henan University of Science and Technology

Due to the differences in disciplines and regional cultural spirits,the campus landscape of Chinese universities has varying cultural connotations.Campus landscape is not only a reflection of regional school history and culture,but also a potential factor affecting students'ideology and values.At present,some colleges and universities in China only concern and consider the visual impact effect of campus landscape construction,while others take landscape planning and construction as an accessory of the main building,which seriously affects the soul guiding role of campus culture in campus landscape.The internal and external landscape pattern of Henan University of Science and Technology with landscape road and water system as the framework,as well as core scenic spots with rich cultural connotations,such as“Peony Dinghu map”,“Yueqin Lake”,embody the university history and culture,the characteristics of western Henan architecture and the specific campus culture positioning,providing a stark example for landscape planning and design of other colleges and universities in the future.

2021年河南省中医儿科医疗资源配置的公平性及效率分析

目的:分析2021年河南省中医儿科医疗资源配置公平性及效率。方法:采用洛伦兹曲线、基尼系数与数据包络分析(DEA)法对河南省2021年中医儿科医疗资源按人口及地域面积的分布进行公平性和效率研究。结果:2021年河南省千儿童中医儿科床位数为0.214张,千平方米中医儿科床位数为0.028张。中医儿科床位数、中医儿科执业(助理)医师数、中医儿科护士数按人口分布的基尼系数分别为0.27、0.25、0.25,处于公平状态;按地域面积分布的基尼系数分别为0.41、0.41、0.40,处于不公平状态。全省有5个(27.8%)地级行政区DEA综合效率为1.000。结论:河南省各地级行政区中医儿科医疗资源配置差异明显,资源投入过剩与产出不足同时存在,资源配置效率有待提高。

河南省孕产妇健康素养水平现状分析

目的了解河南省孕产妇健康素养现状,分析当前孕产妇健康素养存在的问题,为促进健康教育、进行健康干预和提高妇女健康水平提供参考依据。方法采用分层抽样方法,应用《全国居民健康素养监测调查问卷》,抽取河南省妇女人群健康素养提升项目单位的孕产妇为研究对象,对其开展健康素养水平调查。结果河南省孕产妇总体健康素养水平为43.3%,其中基本健康知识和理念、健康生活方式与行为、健康技能3个方面的健康素养水平分别为51.7%、45.2%、35.7%。6类健康问题素养水平分别为基本医疗素养22.5%、健康信息素养34.3%、传染病防治素养40.2%、慢性病防治素养41.6%、科学健康观素养58.0%、安全与急救素养65.9%。年龄、文化程度、职业在总体健康素养、健康素养的3个方面和6类健康问题素养水平间的比较差异均有统计学意义(均P<0.05);不同婚姻状况在基本知识和理念方面、科学健康观和慢性病防治2类健康问题素养水平的比较差异均有统计学意义(均P<0.05)。结论河南省孕产妇健康素养水平较高,但不同社会人口学特征和不同维度的孕产妇健康素养水平不均衡,应在政府主导、多部门合作和全社会参与下,重点提高文化程度较低孕产妇的健康素养水平,进一步加强健康技能指导和基本医疗宣教,引导孕产妇及妇女群体养成健康的生活方式和行为,助力健康中国建设。

河南省胞内分枝杆菌临床分离株耐药特征及基因分型

目的:分析河南省胞内分枝杆菌临床分离株的耐药及基因分型。方法:收集68株2019年河南省部分地市结核病专科医院痰标本分离的胞内分枝杆菌,采用微孔板法测定其对16种药物的敏感性,用16位点VNTR方法进行基因分型,并用BioNumerics软件对分型数据进行聚类分析。结果:68株对克拉霉素、利福布汀和甲氧苄啶/磺胺甲恶唑的耐药率分别为11.76%(8/68)、5.88%(4/68)、8.82%(6/68)。克拉霉素、利福布汀和甲氧苄啶/磺胺甲恶唑的抑制50%胞内分枝杆菌的最低抑菌浓度(MIC 50)和MIC 90分别为2和32 mg/L、0.5和2 mg/L以及0.25/4.75和2/38 mg/L。16位点VNTR将68株分为45个基因型,包括来自11个簇的34株和34个独特模式的分离株,Hunter-Gaston分辨力指数为0.978。成簇菌株利奈唑胺和阿米卡星耐药率高于非成簇菌株(58.82%vs 23.53%;44.12%vs 14.71%)(P<0.05)。结论:克拉霉素、利福布汀和甲氧苄啶/磺胺甲恶唑等对河南省胞内分枝杆菌临床分离株具有较好的抗菌活性。VNTR分型方法对胞内分枝杆菌具有较好的分型能力。成簇菌株中利奈唑胺和阿米卡星的耐药率高于非成簇菌株。

基于因子分析法与聚类分析法的河南省农产品物流发展水平研究

2023年中央一号文件提出“坚持不懈地把解决好‘三农’问题作为全党工作重中之重,举全党全社会之力全面推进乡村振兴,加快农业农村现代化”,推动农业发展,助力乡村振兴是我国的重点工作。为了研究河南省农产品物流情况,助力农业发展,以河南省的18个省辖市为研究样本,借助SPSS.23软件进行因子分析,以评价各市农产品物流不同的发展水平。利用聚类分析,按照农产品物流发展水平的综合得分将河南省的18个省辖市分为4类,最后有针对性的提出相关建议以推进各地区农产品物流高效发展。

1960-2020年河南省极端降水时空演变特征

全球变暖加快了水文循环速度,导致极端降水事件频发,增强了城市排水负荷和洪涝风险,并影响了区域气候的时空特征。在河南省均匀选取26个雨量站对1960—2020年61年间的降水资料进行研究,采用趋势分析、Kriging插值、M-K突变分析、Morlet小波变换和Spearman相关系数等方法对河南省9个极端降水指数的时空演变特征进行分析。结果显示:河南省年降水量呈上升趋势,极端降水事件呈下降趋势,河南省整体气候逐渐变得湿润。河南省极端降水指数具有显著空间差异,东南部极端降水风险显著大于西北部。除降水强度、最大连续降水日数和1 d最大降水量外,其余指数与年降水量、汛期和6—9月的各月降水量具有良好的相关性,这对于评估年降水量及其年内分布特征、极端降水事件频率有较好的参考作用。结果表明:降水从短历时高强度向长历时低强度演变,要应对此类长历时极端降水的风险,防涝思路应从提高短时间大量排水能力转变到提高长时间低强度吸收降水能力。

乡村振兴战略下地域性农产品包装设计研究--以豫北黄小米为例

在乡村振兴战略背景下,探索具有豫北地域特色的设计模式,提升豫北黄小米包装的视觉品质,助力乡村振兴。以豫北黄小米包装设计为例,使用问卷调查的方法对豫北黄小米包装设计现状具体问题进行分析。充分提取豫北地区文化介质,结合目标用户需求提出优化方案并付诸实践。通过设计赋能,提升农产品附加值,引发消费者认同,促进地域类农产品的良性发展。

豫西夹沟铝土矿床古地理环境分析

夹沟铝土矿赋存于奥陶系碳酸盐岩古风化剥蚀面上,含矿层位为上石炭统本溪组,为一大型铝土矿床。查阅前人对该区的研究成果,结合矿区大量基础资料,从矿床地质特征、沉积相、古气候、地球化学、生物生态等多角度开展综合研究,表明该区矿床古地理环境是气候湿热的近海陆交互环境。通过对其古地理环境的分析,提高该区古地理环境研究程度,也为后续矿山开发利用和矿区深部找矿提供指导。

河南省夏玉米花期高温热害时空分布特征

基于1957—2022年河南省109个县(区)气象站的逐日气象数据,计算夏玉米花期日最高气温≥35℃持续天数及累计天数,从连续型高温热害与非连续型高温热害2个方面分析河南省夏玉米花期高温热害的发生频率和时空分布特征,以期为河南省夏玉米生产上的抗灾避灾提供科学依据。结果表明,在时间分布上,1957—2022年,河南省夏玉米花期高温热害发生频率呈现出先降低后增加的趋势,在2010年以后,高温热害呈现频发趋势,且连续型高温热害的发生频率更高。高温热害发生频率较高的时间为1960年代和2010年以后,且1960年代以中度和重度高温热害为主,2010年以后以轻度和中度高温热害为主。在空间分布上,河南省夏玉米花期高温热害发生频率呈现出豫东、豫南地区较高,豫西、豫北较低的特征。高温热害高风险地区分布于南阳市南部、驻马店市、周口市和商丘市东部,低风险地区分布于安阳市、濮阳市和鹤壁市。在高温热害类型上,商丘市南部更容易发生连续型高温热害;漯河市和周口市更容易发生非连续型轻度高温热害,南阳市南部更容易发生非连续型中度和重度高温热害,驻马店市南部更容易发生非连续型重度高温热害。

河南岳村铝土矿床控矿因素及找矿方向

河南岳村铝土矿床含矿层位为上石炭统本溪组,赋存于奥陶系碳酸盐岩古风化剥蚀面上,为一大型铝土矿床。本文针对该矿床深部铝土矿的控矿因素及找矿方向研究空白,通过查阅前人研究成果、分析矿区大量基础资料,提出岳村铝土矿床是在特定的时期、古地形、古构造、古气候、成矿作用等因素综合作用下而形成,总结其找矿标志及方向,提出有针对性的找矿建议。

河南省35岁及以上居民糖尿病防治现状及影响因素

目的 了解河南省35岁及以上居民糖尿病患病、治疗和控制情况,分析血糖控制的影响因素,为河南开展糖尿病防治提供数据支持和科学依据。方法 数据来源于2013年和2018年河南省卫生服务调查资料,分析糖尿病防控相关指标的变化趋势以及影响血糖控制的因素。结果 河南省2018年35岁及以上居民糖尿病患病率、治疗率和控制率分别为8.23%、73.88%和36.13%,与2013年调查相比,糖尿病患病率上升,治疗率和控制率均下降(P<0.05);多因素logistic回归表明,自评健康状况良好(一般:OR=0.689,95%CI 0.533~0.890。良好:OR=0.628,95%CI 0.430~0.918)、参加体育锻炼(OR=0.710,95%CI:0.564~0.895)是糖尿病控制率的积极因素,农村(OR=1.311,95%CI:1.041~1.652)、超重(OR=1.282,95%CI:1.013~1.623)、肥胖(OR=1.462,95%CI:1.086~1.967)、焦虑或抑郁(OR=1.494,95%CI:1.089~2.050)为糖尿病控制率的危险因素(P<0.05)。结论 河南省居民糖尿病患病率处于较高水平,糖尿病防治效果不明显,亟待针对农村、超重、肥胖、焦虑或抑郁和缺乏体育锻炼等人群开展糖尿病综合防控。