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Journal of Arid Land 2021年第10期13卷 1026-1040页

作者： SUN Chen ma yonggang GONG Lu College of Resources and Environmental Sciences Xinjiang UniversityUrumqi 830046China Key Laboratory of Oasis Ecology Urumqi 830046China School of Ecology and Environmental Science Yunnan UniversityKunming 650500China

Land use/cover change(LUCC)is becoming more and more frequent and extensive as a result of human activities,and is expected to have a major impact on human welfare by altering ecosystem service value(ESV).In this study,we utilized remote sensing images and statistical data to explore the spatial-temporal changes of land use/cover types and ESV in the northern slope economic belt of the Tianshan Mountains in Xinjiang Uygur Autonomous Region,China from 1975 to *** the study period,LUCC in the study region varied *** grassland and unused land,all the other land use/cover types(cultivated land,forestland,waterbody,and construction land)increased in *** 1975 to 2018,the spatial-temporal variations in ESV were also *** total ESV decreased by 4.00×10^(8) CNY,which was primarily due to the reductions in the areas of grassland and unused *** had a much higher ESV than the other land use/cover ***,understanding the impact of LUCC on ESV and the interactions among ESV of different land use/cover types will help improve existing land use policies and provide scientific basis for developing new conservation strategies for ecologically fragile areas.

关键词： land use/cover types ecosystem services human activities economic development urbanization the northern slope economic belt of the Tianshan Mountains

Evaluation of the water conservation function in the Ili River Delta of Central Asia based on the InVEST model

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Journal of Arid Land 2023年第12期15卷 1455-1473页

作者： CAO Yijie ma yonggang BAO Anming CHANG Cun LIU Tie College of Geography and Remote Sensing Sciences Xinjiang UniversityUrumqi 830046China Xinjiang Key Laboratory of Oasis Ecology Xinjiang UniversityUrumqi 830046China College of Ecology and Environment Xinjiang UniversityUrumqi 830046China Xinjiang Jinghe Observation and Research Station of Temperate Desert Ecosystem Ministry of EducationJinghe 833300China Key Laboratory of Oasis Ecology of Education Ministry Urumqi 830046China State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of GIS&RS Application Xinjiang Uygur Autonomous RegionUrumqi 830011China

The Ili River Delta(IRD)is an ecological security barrier for the Lake Balkhash and an important water conservation area in Central *** this study,we selected the IRD as a typical research area,and simulated the water yield and water conservation from 1975 to 2020 using the water yield module of the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)*** further analyzed the temporal and spatial variations in the water yield and water conservation in the IRD from 1975 to 2020,and investigated the main driving factors(precipitation,potential evapotranspiration,land use/land cover change,and inflow from the Ili River)of the water conservation variation based on the linear regression,piecewise linear regression,and Pearson's correlation coefficient *** results indicated that from 1975 to 2020,the water yield and water conservation in the IRD showed a decreasing trend,and the spatial distribution pattern was"high in the east and low in the west";overall,the water conservation of all land use types decreased *** water conservation volume of grassland was the most reduced,although the area of grassland increased owing to the increased inflow from the Ili *** the same time,the increased inflow has led to the expansion of wetland areas,the improvement of vegetation growth,and the increase of regional evapotranspiration,thus resulting in an overall reduction in the water *** water conservation depth and precipitation had similar spatial distribution patterns;the change in climate factors was the main reason for the decline in the water conservation function in the *** reservoir in the upper reaches of the IRD regulated runoff into the Lake Balkhash,promoted vegetation restoration,and had a positive effect on the water conservation;however,this positive effect cannot offset the negative effect of enhanced *** results provide a reference for the rational allocation of water resources and ecosys

关键词： water conservation function water yield Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model climate change land use/land cover change(LUCC) Ili River Delta Lake Balkhash

A simulation-based two-stage interval-stochastic programming model for water resources management in Kaidu-Konqi watershed,China

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Journal of Arid Land 2012年第4期4卷 390-398页

作者： Yue HUANG Xi CHEN YongPing LI AnMing BAO yonggang ma College of Urban and Environmental Sciences Peking University Beijing 100871 China StateKey Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China MOE Key Laboratory of Regional Energy Systems Optimization Sino-Canada Resources and Environmental ResearchAcademy North China Electric Power University Beijing 102206 China Xinjiang Remote Sensing Center Urumqi 830011 China

This study presented a simulation-based two-stage interval-stochastic programming （STIP） model to support water resources management in the Kaidu-Konqi watershed in Northwest China. The modeling system coupled a distributed hydrological model with an interval two-stage stochastic programing （ITSP）. The distributed hydrological model was used for establishing a rainfall-runoff forecast system, while random parameters were pro- vided by the statistical analysis of simulation outcomes water resources management planning in Kaidu-Konqi The developed STIP model was applied to a real case of watershed, where three scenarios with different water re- sources management policies were analyzed. The results indicated that water shortage mainly occurred in agri- culture, ecology and forestry sectors. In comparison, the water demand from municipality, industry and stock- breeding sectors can be satisfied due to their lower consumptions and higher economic values. Different policies for ecological water allocation can result in varied system benefits, and can help to identify desired water allocation plans with a maximum economic benefit and a minimum risk of system disruption under uncertainty.

关键词： optimization two-stage stochastic programming uncertainty water resources management hydrological model Kaidu-Konqi watershed Tarim River Basin

Membrane-spanning domain of bovine foamy virus transmembrane protein having cytotoxicity

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Frontiers in Biology 2006年第4期1卷 353-356页

作者： ma yonggang YU Hong WANG Jinzhong CHEN Qimin GENG Yunqi College of Life Sciences Nankai UniversityTianjin 300071China

Foamy viruses(FVs)have broad cellular tropism infecting vertebrates from fish to human being,which indicates that Env protein has a high capability for membrane *** features in all FV transmembrane(TM)proteins include a region of hydrophobic domain called membrane-spanning domain(MSD),which contains several stretches of hydrophobic amino *** investigate whether these features were associated with the cytotoxicity effect of TM on Escherichia coli,a series of mutants were constructed and expressed in the *** BL21(DE3)using pET-32a(+)as expressing *** results showed that only TM3 without MSD was expressed in ***,whereas the other two containing full or part of the MSD(TM1 and TM2)could not be ***,the bacterial amount and living bacteria analysis revealed that the cytotoxicity of TM was dependent on its MSD,especially on the stretches of hydrophobic amino *** blotting analysis showed that TM3 protein was purified with affinity purification.

关键词： bovine foamy virus(BFV) membrane-spanning domain(MSD) cytotoxicity

Use of deep learning in forensic sex estimation of virtual pelvic models from the Han population

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Forensic Sciences Research 2022年第3期7卷 540-549页

作者： Yongjie Cao yonggang ma Xiaotong Yang Jian Xiong Yahui Wang Jianhua Zhang Zhiqiang Qin Yijiu Chen Duarte Nuno Vieira Feng Chen Ji Zhang Ping Huang Shanghai Key Laboratory of Forensic Medicine Shanghai Forensic Service PlatformAcademy of Forensic ScienceMinistry of JusticeShanghaiChina Department of Forensic Medicine Nanjing Medical UniversityNanjingChina Department of Medical Imaging 3201 Hospital of Xi’an Jiaotong University Health Science CenterHanzhongChina Department of Forensic Pathology Shanxi Medical UniversityTaiyuanChina Department of Forensic Medicine Guizhou Medical UniversityGuiyangChina Institute of Legal Medicine Faculty of MedicineUniversity of CoimbraCoimbraPortugal

Accurate sex estimation is crucial to determine the identity of human skeletal remains ***,we developed convolutional neural network(CNN)models for sex estimation on virtual hemi-pelvic regions,including the ventral pubis(VP),dorsal pubis(DP),greater sciatic notch(GSN),pelvic inlet(PI),ischium,and acetabulum from the Han population and compared these models with two experienced forensic anthropologists using morphological methods.A Computed Tomography(CT)dataset of 862 individuals was divided into the subgroups of training,validation,and testing,*** CT-based virtual hemi-pelvises from the training and validation groups were used to calibrate sex estimation models;and then a testing dataset was used to evaluate the performance of the trained models and two human experts on the sex estimation of specific pelvic regions in terms of overall accuracy,sensitivity,specificity,F1 score,and receiver operating characteristic(ROC)*** for the ischium and acetabulum,the CNN models trained with the VP,DP,GSN,and PI images achieved excellent results with all the prediction metrics over *** accuracies were superior to those of the two forensic anthropologists in the independent ***,the heatmap results confirmed that the trained CNN models were focused on traditional sexual anatomic traits for sex *** study demonstrates the potential of AI techniques based on the radiological dataset in sex estimation of virtual pelvic *** excellent sex estimation performance obtained by the CNN models indicates that this method is valuable to proceed with in prospective forensic trials.

关键词： Forensic sciences forensic anthropology sex estimation pelvis deep learning convolutional neural network

Captive Breeding of the Four-eyed Turtle(Sacalia quadriocellata)

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Asian Herpetological Research 2010年第2期1卷 111-117页

作者： HE Bin LIU Yuxiang SHI Haitao ZHANG Jie HU maogui ma yonggang FU Lirong HONG Meiling WANG Jichao Fong J.Jonathan Parham F.James College of Life Sciences Hainan Normal University Chengdu Institute of Biology Chinese Academy of Sciences Museum of Vertebrate Zoology Department of Integrative BiologyUniversity of California at Berkeley Alabama Museum of Natural History University of Alabama

In 1998,a study on forty-five four-eyed turtles(Sacalia quadriocellata) was initiated to gather preliminary biological data of this species and to investigate the feasibility of its captive *** the following six years,no courtship behavior was found occurring in males and no oviposition in *** 2004 to 2007,two successful techniques were applied to initiate reproductive behavior:1) injecting exogenous reproductive hormones; and 2) reducing the stress of living in *** a result of the hormone treatments,courtship behavior and copulation were observed during September and October,***,no courtship displays were seen from the CK males,which were not treated with *** occurred between December and march,and the correlation was not significant between behavior of ovulation and food *** laid only one clutch of eggs each year,with 2.47 eggs(n=34,range=1–4) at average,and 84 eggs were totally obtained,of which 13 were damaged,52 were infertile and 19 *** the fertile eggs,nine were hatched with mean incubation period of 105.9 days(n=9,range=89–122 days) at temperature ranging from 24 to 27℃.

关键词： four-eyed turtle Sacalia quadriocellata captive breeding hormone stress conservation

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高海拔山区草地物候提取方法对比分析

武汉大学学报（信息科学版） 2022年第5期47卷 753-761页

作者：马勇刚黄粤肖正清新疆大学资源与环境科学学院新疆乌鲁木齐830046 绿洲生态教育部重点实验室新疆乌鲁木齐830046 中国科学院新疆生态与地理研究所新疆荒漠与绿洲生态国家重点实验室新疆乌鲁木齐830011 新疆大学数学与系统科学学院新疆乌鲁木齐830046

准确量测高海拔山区的植物物候对理解全球变化下的敏感生态系统的响应具有重要意义。利用物候相机和遥感技术开展物候信息的提取和对比,既能准确评估物候相机在山区植物物候提取的性能,又可为山区遥感物候数据反演提供重要参考。利用中... 详细信息

准确量测高海拔山区的植物物候对理解全球变化下的敏感生态系统的响应具有重要意义。利用物候相机和遥感技术开展物候信息的提取和对比,既能准确评估物候相机在山区植物物候提取的性能,又可为山区遥感物候数据反演提供重要参考。利用中国新疆维吾尔自治区天山山区人工观测、物候相机和遥感数据,测试了5种曲线拟合方式与4种物候参数提取方法的20种组合的物候参数提取结果,对比了3种数据在物候信息提取结果的异同。结果表明:(1)植物物候相机能在天山山区草地物候观测中提供高时间分辨率的绿度变化信息,是山区开展物候观测并验证遥感物候数据的有效手段。(2)山区雨雪天气等对相对绿度指数产生较强噪声影响,需要选择合适的滤波器进行去噪。(3)曲线拟合方式和物候提取方法均对物候参数数值产生影响。而提取方法可产生更明显的差异性,其中,阈值法和导数法提取的物候数值相近,开始期与人工观测的返青期一致性较好,停止期与枯黄期一致性较好;而Klosterman方法和Gu方法提取物候数值相近,提取的开始期与人工观测的返青末期一致性较好,停止期与人工观测的枯黄末期一致性较好。(4)20种不同滤波+提取方法的组合形式在山区遥感数据物候信息提取的有效性仅为48%,中分辨率成像光谱仪数据的最有效提取方法为Beck+Derivatives组合,可见光红外成像辐射套件数据的最优提取方法为Beck+Threshold组合和Elmore+Derivatives组合。

关键词：物候相机遥感数据物候观测中国新疆天山草地曲线拟合方法

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中空锚固注浆封堵技术在色连二矿的应用

煤矿安全 2014年第12期45卷 163-165,169页

作者：马永刚鄂尔多斯色连二矿矿建部内蒙古鄂尔多斯017008

矿井巷道在掘进过程中需要对顶板和围岩进行支护,而在围岩破碎且有淋水的巷道是锚网喷浆支护的难题,对支护效果影响较大。在锚网喷浆支护之前,通过中空锚固注浆封堵新技术,对顶板出水处注浆充填加固堵水,对部分地段淋水较大部位,可用中... 详细信息

矿井巷道在掘进过程中需要对顶板和围岩进行支护,而在围岩破碎且有淋水的巷道是锚网喷浆支护的难题,对支护效果影响较大。在锚网喷浆支护之前,通过中空锚固注浆封堵新技术,对顶板出水处注浆充填加固堵水,对部分地段淋水较大部位,可用中空锚杆进行注浆封堵,防止巷道变形。中空锚固注浆封堵新技术在鄂尔多斯色连二矿的成功应用,为锚网喷浆支护创造了良好条件。

关键词：中空锚固注浆封堵围岩支护巷道变形支护效果

基于1982～2013年NDVI数据的新疆30年植被状况季节与年际趋势分析

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气候与环境研究 2018年第1期23卷 26-36页

作者：马勇刚黄粤新疆大学资源与环境科学学院乌鲁木齐830046 中国科学院新疆生态与地理研究所荒漠与绿洲生态重点实验室乌鲁木齐830011

以GIMMS 3g(the third generation Global Inventory Modeling and mapping Studies Normalized Difference Vegetation Index)数据为基础,利用月合成、标准距平和趋势保留预置白方法进行数据预处理,采用季节趋势分析方法提取振幅0、振幅1和相位1季节表征因子,运用MK(mann-Kendall)和CMK(Contextual mann-Kendall)趋势检验获取新疆植被年际和季节趋势变化特征,结合土地利用覆盖数据,侦测显著性变化区域的空间分布特点,讨论并分析不同预处理方法和趋势分析方法下的结果差异。研究表明:(1)植被状况趋于退化的区域面积明显大于植被状况转好的面积,植被退化区域主要集中在南北疆荒漠区域的未利用地和草地,转好的区域则主要集中在山区草地、未利用地和耕地区域;(2)新疆植被年内波动幅度有明显增加的趋势,主要分布在塔里木盆地南缘以北的草地、未利用地和耕地;(3)不同预处理方法下的植被状况趋势显著性结果存在明显的影响,按照显著性信息的提取能力排序,标准距平>趋势保留预置白>原始数据>月平均;(4)耕地区域中有87.88%表现出年内波动幅度显著增加的趋势,53.31%生长季开始期显著推迟。

关键词：年际变化季节变化 GIMMS 3g数据趋势分析新疆

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图书馆采购经费合理分配的经济测度

图书情报工作 2002年第1期46卷 102-104页

作者：马永刚南京经济学院图书馆南京210003

从经济学的角度对图书馆信息的需求变化指数进行量化测度,以谋求采购资金的合理分配和科学利用。

关键词：图书馆采访工作采购经费经济测度经费分配信息需求变化指数