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海南青皮林省级自然保护区人类活动干扰评价分析

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测绘与空间地理信息 2024年第1期47卷 66-70页

作者：张晓倩穆晓东闫敏张丽江苏海洋大学海洋技术与测绘学院江苏连云港222005 中国科学院空天信息创新研究院数字地球重点实验室北京100094 海南省环境科学研究院海南三亚570100 海南省地球观测重点实验室中国科学院空天信息研究院海南研究院海南三亚572029

人类活动对自然保护区的生物多样性和生态平衡有潜在的重要影响,定量评价人类活动干扰对保护区的保护与管理具有重要意义。本文基于多源遥感数据,结合社会、经济、外业调查数据,利用熵值法和“N-E-S”(自然(Nature)、经济(Economy)、社... 详细信息

人类活动对自然保护区的生物多样性和生态平衡有潜在的重要影响,定量评价人类活动干扰对保护区的保护与管理具有重要意义。本文基于多源遥感数据,结合社会、经济、外业调查数据,利用熵值法和“N-E-S”(自然(Nature)、经济(Economy)、社会(Social))模型,构建了自然保护区人类活动干扰评价指标体系,开展了海南青皮林省级自然保护区人类活动干扰强度评价分析。2017—2020年间,青皮林保护区及不同实验区范围内,林地面积减少幅度最大,且距离保护区越远,面积减少幅度越大;人类活动干扰主要来自旅游、农业用地、居民点用地等开发活动频繁的东部地区,在保护区内部以及不同范围实验区内,人类活动干扰强度以低等级为主,保护区内部干扰强度稍有增加,0—3 km实验区范围内干扰强度下降,3—6 km范围内干扰强度增加最多。本文研究结果可为省级保护区的进一步督察提供可靠的信息来源,为省级自然保护区后续管理政策的制定提供信息支撑。

关键词：人类活动干扰青皮林省级自然保护区熵值法 “N-E-S”模型

Applying COSISIM model to study the permeability of porous media

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Journal of Coal Science & Engineering(China) 2011年第2期17卷 128-132页

作者： LIU Zhen mu Chao-min Yuandian No.2 mine Huaibei Mining （Group） Co. Ltd. Huaibei 233665 China School of Energy Resources and Safety Anhui University of Science and Technology Huainan 232001 China

Accuracy of simulated permeability can be improved using soft data during the process of simulation. Integrating soft data with hard data, a method based on COSISIM （sequential indicator cosimulation） was proposed to reconstruct permeability. The algorithm COSISIM extends the SISIM （sequential indicator simulation） algorithm to handle secondary data. At the difference of SISIM, data must already be an indicator-coded prior to using COSISIM. The soft data were integrated with hard data using the Markov-Bayes algorithm and must be coded into indicators before they are used. This method was tested on a regional simulation of permeability. The simulated results and the original distribution of permeability were compared. The experimental results demonstrate that this method is practical.

关键词： permeability soft data COSISIM simulation hard data

S4Net: Single stage salient-instance segmentation

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Computational Visual Media 2020年第2期6卷 191-204页

作者： Ruochen Fan ming-ming Cheng Qibin Hou Tai-Jiang mu Jingdong Wang Shi-min Hu BNRist Tsinghua UniversityBeijing100086China Nankai University Tianjin300071China MSRA Beijing100086China

In this paper, we consider salient instance segmentation. As well as producing bounding boxes,our network also outputs high-quality instance-level segments as initial selections to indicate the regions of interest. Taking into account the category-independent property of each target, we design a single stage salient instance segmentation framework, with a novel segmentation branch. Our new branch regards not only local context inside each detection window but also the surrounding context, enabling us to distinguish instances in the same scope even with partial *** network is end-to-end trainable and is fast(running at 40 fps for images with resolution 320 × 320). We evaluate our approach on a publicly available benchmark and show that it outperforms alternative solutions. We also provide a thorough analysis of our design choices to help readers better understand the function of each part of our network. Source code can be found at https://***/Ruochen Fan/S4 Net.

关键词： salient-instance segmentation salient object detection single stage region-of-interest masking

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不同气象条件对高油酸花生产量的影响

中国油料作物学报 2024年第1期46卷 129-134页

作者：胡延岭杨海棠李盼于沐石彦召刘软枝朱桢桢韩艳红郑晓川赵利民无郑州市农林科学研究所河南郑州450005 荥阳市扶贫开发服务中心河南荥阳450100 河南省植物保护检疫站河南郑州450005

以河南、山东等5个花生主要产区培育的19个高油酸花生新品种为材料,于2019年~2021年连续3年在郑州种植,采集3年间花生关键生育期(6月~9月)的旬平均气温、旬降水量和旬日照时数等气象数据,结合各个品种的产量数据进行综合分析。研究结果... 详细信息

以河南、山东等5个花生主要产区培育的19个高油酸花生新品种为材料,于2019年~2021年连续3年在郑州种植,采集3年间花生关键生育期(6月~9月)的旬平均气温、旬降水量和旬日照时数等气象数据,结合各个品种的产量数据进行综合分析。研究结果表明,不同的品种对于气温、降水量和日照时数的敏感程度不同,冀花16、冀花11对开花下针期的温度和日照时数比较敏感,该时期的异常高温会致使其产量明显下降。中花413、中花412和花育917的产量与旬降水量成显著负相关,耐涝程度较差。对品种的稳定性分析表明,开农1768、南充1704、冀农16、开选016、花育961、郑农花25、郑农花23、冀农11、花育633和1508G等10个高油酸品种为年际间稳定性较好的品种,研究结论为高油酸品种的培育及深入利用提供了指导。

关键词：花生高油酸气象条件产量

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A model supported by GIS for locating and quantifying PM_(2.5) emission originated from residential wood burning

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Journal of Environmental Sciences 2005年第5期17卷 861-865页

作者： ZHOU De-min RADKE John TIAN Yong-qian XU Jian-chun mu Lan Northeast Institute of Geography and Agricultural Ecology Chinese Academy Sciences Changchun 130012 China Geographical Information Science Center 102 Wheeler Hall University of California Berkeley CA 94720 USA Center for Assessment and Monitoring of Forest and Environmental Resources 151 Hilgard Hall University of California Berkeley CA 94720 USA

A research method was presented for spatially quantifying and allocating the potential activity of a fine particle matter emission （ PM2.5 ）, which originated from residential wood burning （RWB） in this study. Demographic, hypsographic, climatic and topographic data were compiled and processed within a geographic information system（GIS）, and as independent variables put into a linear regression model for describing spatial distribution of the potential activity of residential wood burning as primary heating source. In order to improve the estimation, the classifications of urban, suburban and rural were redefined to meet the specifications of this application. Also, several definitions of forest accessibility were tested for estimation. The results suggested that the potential activity of RWB was mostly determined by elevation of a location, forest accessibility, urban/non-urban position, climatic conditions and several demographic variables. The linear regression model could explain approximately 86% of the variation of surveyed potential activity of RWB. The analysis results were validated by employing survey data collected mainly from a WebGIS based phone interview over the study area in central California. Based on lots free public GIS data, the model provided an easy and ideal tool for geographic researchers, environmental planners and administrators to understand where and how much PM2.5 emission from RWB was contributed to air quality. With this knowledge they could identify regions of concern, and better plan mitigation strategies to improve air quality. Furthermore, it allows for future adjustment on some parameters as the spatial analysis method is implemented in the different regions or various eco-social models.

关键词： residential wood burning(RWB) PM2.5 demographical characteristies Geographic information system(GIS) stepwise linear regression

Melting Characteristics and Wettability of Binding Phase in Sinter

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Journal of Iron and Steel Research International 2009年第3期16卷 1-5页

作者： SHEN Feng-man LI Guang-sen DING Zhi-min mu Lin School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China

The melting characteristics and wettability of the binding phase in high basicity sinter were studied. By changing nCaO∶nFe2O3 （molar ratio of CaO to Fe2O3） as well as the percentage of MgO,SiO2,and Al2O3,the melting characteristics and wettability of the binding phase were discussed. The results indicated that the characteristic melting temperature was the lowest and wettability was the best at nCaO∶nFe2O3=1∶1 （without addition）; the addition of MgO increased the characteristic melting temperature and contact angles; when the percentage of SiO2 or Al2O3 was 3%,the characteristic melting temperature was the lowest,whereas the contact angles increased with an increase in SiO2 and Al2O3 contents.

关键词： sinter binding phase characteristic melting temperature contact angle

Sc_(2)O_(3)和Y_(2)O_(3)复合掺杂ZrO_(2)热障涂层陶瓷材料的组织结构与力学性能

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材料工程 2024年第6期52卷 139-146页

作者：王志刚刘仍谦谢敏张永和王炫力宋希文常振东刘德林牟仁德内蒙古科技大学材料科学与工程学院内蒙古包头014010 轻稀土资源绿色提取与高效利用教育部重点实验室(内蒙古科技大学) 内蒙古包头014010 中国航发北京航空材料研究院北京100095

质量分数为7±1%氧化钇部分稳定氧化锆(7YSZ)是广泛应用的热障涂层陶瓷材料。然而,其在1200℃以上长期服役存在相稳定性差、烧结加剧和力学性能下降等弊端。因此,本工作提出新型Sc_(2)O_(3)-Y_(2)O_(3)协同掺杂ZrO_(2)热障涂层陶瓷材料... 详细信息

质量分数为7±1%氧化钇部分稳定氧化锆(7YSZ)是广泛应用的热障涂层陶瓷材料。然而,其在1200℃以上长期服役存在相稳定性差、烧结加剧和力学性能下降等弊端。因此,本工作提出新型Sc_(2)O_(3)-Y_(2)O_(3)协同掺杂ZrO_(2)热障涂层陶瓷材料,采用固相合成法制备了摩尔分数为7.5%Sc_(2)O_(3)-x%Y_(2)O_(3)-(92.5-x)%ZrO_(2)(x=0,0.1,0.2,0.3)陶瓷。通过X射线衍射仪(XRD)、场发射扫描电镜(SEM)等手段,重点探究Y_(2)O_(3)掺杂含量对高温固相合成陶瓷材料的微观组织结构演变行为以及维氏硬度、断裂韧性、弹性模量和三点抗弯强度等力学性能的影响规律。结果表明:Sc_(2)O_(3)-Y_(2)O_(3)复合掺杂ZrO_(2)陶瓷材料经1450℃×3.5 h高温烧结的致密度大于97%,主要由四方相结构组成,该材料的维氏硬度、弹性模量、断裂韧性和三点抗弯强度与传统8YSZ相当,分别为13~14 GPa,211~214 GPa,6.5~7.0 MPa·m^(1/2),520~850 MPa之间;断裂机制主要为穿晶断裂和沿晶断裂的混合方式,其中以穿晶断裂为主导。Sc_(2)O_(3)-Y_(2)O_(3)复合掺杂ZrO_(2)陶瓷可作为一种潜在的高温热障涂层陶瓷材料。

关键词：热障涂层稀土掺杂氧化锆氧化钪微观组织力学性能

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微流控芯片在尘肺研究中的应用前景

中华疾病控制杂志 2024年第5期28卷 591-595页

作者：田畅邵超杰李梦雪周琳黄辉朱锋仁穆敏叶冬青安徽理工大学公共卫生学院预防医学系淮南232001 安徽理工大学工业粉尘防控与职业安全健康教育部重点实验室淮南232001 安徽理工大学医学院淮南232001

尘肺病是一种严重危害人们身心健康的职业病,研究尘肺病的发病机制对尘肺的预防、诊断和治疗具有重要意义。然而,传统体内与体外研究方法存在诸多技术难题,无法重现体内三维肺组织与肺部物理和生物微环境,难以对其中的生理生化过程进行... 详细信息

尘肺病是一种严重危害人们身心健康的职业病,研究尘肺病的发病机制对尘肺的预防、诊断和治疗具有重要意义。然而,传统体内与体外研究方法存在诸多技术难题,无法重现体内三维肺组织与肺部物理和生物微环境,难以对其中的生理生化过程进行实时动态观察,制约着尘肺病理机制相关方面的研究。微流控芯片以其对细胞、粒子和溶液的时间与空间操控能力,为模拟肺部状态,重构其物理和生物微环境提供了新思路。本研究以粉尘粒子与肺的相互作用为出发点,综述了粉尘粒子在肺部的沉积特性及粉尘粒子对肺产生的生理生化变化,以及利用微流控芯片在粉尘粒子与尘肺相互作用方面的研究进展。

关键词：微流控职业病尘肺器官芯片

Leaching of lead from zinc leach residue in acidic calcium chloride aqueous solution

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International Journal of minerals,Metallurgy and Materials 2015年第5期22卷 460-466页

作者： Le Wang Wen-ning mu hong-tao Shen Shao-ming Liu Yu-chun Zhai School of Materials and Metallurgy Northeastern University School of Resources and Materials Northeastern University at Qinghuangdao

A process with potentially reduced environmental impacts and occupational hazards of lead-bearing zinc plant residue was studied to achieve a higher recovery of lead via a cost-effective and environmentally friendly process. This paper describes an optimization study on the leaching of lead from zinc leach residue using acidic calcium chloride aqueous solution. Six main process conditions, i.e., the solution pH value, stirring rate, concentration of CaC12 aqueous solution, liquid-to-solid （L/S） ratio, leaching temperature, and leaching time, were inves- tigated. The microstructure and components of the residue and tailing were characterized using scanning electron microscopy （SEM） and X-ray diffraction （XRD）. On the basis of experimental results, the optimum reaction conditions were determined to be a solution pH value of 1, a stirring rate of 500 r·min-1, a CaC12 aqueous solution concentration of 400 g·L-1, a liquid-to-solid mass ratio of 7：1, a leaching tempera- ture of 80℃, and a leaching time of 45 min. The leaching rate of lead under these conditions reached 93.79%, with an iron dissolution rate of 19.28%. Silica did not take part in the chemical reaction during the leaching process and was accumulated in the residue.

关键词： lead metallurgy hydrometaUurgy leach residue zinc calcium chloride leaching rate