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Satellite-Based Estimation of Daily Average Net Radiation under Clear-Sky Conditions

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Advances in Atmospheric Sciences 2014年第3期31卷 705-720页

作者： HOU jiangtao jia Gensuo ZHAO Tianbao WANG Hesong TANG Bohui Key Laboratory of Regional Climate-Environment Research for East Asia Institute of Atmospheric Physics Chinese Academy of Sciences University of the Chinese Academy of Sciences State Key Laboratory of Resources and Environment Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences

ABSTRACT Daily average net radiation （DANR） is an important variable for estimating evapotranspiration from satellite data at regional scales, and is used for atmospheric and hydrologic modeling, as well as ecosystem management. A scheme is proposed to estimate the DANR over large heterogeneous areas under clear-sky conditions using only remotely sensed data. The method was designed to overcome the dependence of DANR estimates on ground data, and to map spatially consistent and reasonably distributed DANR, by using various land and atmospheric data products retrieved from MODIS （Moderate Resolution Imaging Spectroradiometer） data. An improved sinusoidal model was used to retrieve the diurnal variations of downward shortwave radiation using a single instantaneous value from satellites. The downward shortwave component of DANR was directly obtained from this instantaneous value, and the upward shortwave component was estimated using satellite-derived albedo products. Four observations of air temperature from MOD07_L2 and MYD07_L2 data products were used to derive the downward longwave component of DANR, while the upward longwave component was estimated using the land surface temperature （LST） and the surface emissivity from MOD1 l_L2. Compared to in situ observations at the cropland and grassland sites located in Tongyu, northern China, the root mean square error （RMSE） of DANR estimated for both sites under clear-sky conditions was 37 W m-2 and 40 W m-2, respectively. The errors in estimation of DANR were comparable to those from previous satellite-based methods. Our estimates can be used for studying the surface radiation balance and evapotranspiration.

关键词： daily average net radiation satellite climate model four-component radiation surface radiation balance

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深水导管架马鞍口焊接冷裂纹的预防措施研究

现代制造技术与装备 2024年第1期60卷 67-69页

作者：董鲁涛刘兰金贾江涛梁荣春朱得银海洋石油工程(青岛)有限公司青岛266520

首先介绍深水导管架项目中马鞍口节点出现的焊接裂纹类型,其次分析裂纹的产生原因,最后针对此类深水导管架项目提出施工过程中的马鞍口焊接节点裂纹预防措施。通过实施全过程质量管理措施,可以有效避免超级延迟裂纹的产生。

关键词：深水导管架马鞍口焊接延迟裂纹预防措施

^（241）Am激发的EDXRF在稀土溶剂萃取分离检测中的应用

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稀土 1996年第6期17卷 10-15页

作者：严纯华贾江涛廖春生王明文李标国徐光宪北京大学稀土材料化学及应用国家重点实验室

本文研究了一种２４１Ａｍ作激发源、高纯平面锗型探测器的ＥＤＸＲＦ快速分析方法。采用这种方法离线分析了ＳｍＥｕＧｄ／Ｔｂ／Ｄｙ槽体中的稀土盐酸盐水溶液样品并同ＩＣＰ测试结果作了比较。结果表明该法可在较宽的稀土浓度范围内... 详细信息

本文研究了一种２４１Ａｍ作激发源、高纯平面锗型探测器的ＥＤＸＲＦ快速分析方法。采用这种方法离线分析了ＳｍＥｕＧｄ／Ｔｂ／Ｄｙ槽体中的稀土盐酸盐水溶液样品并同ＩＣＰ测试结果作了比较。结果表明该法可在较宽的稀土浓度范围内使用。由于这是一种快速、准确、有效的无损分析方法，可用于稀土溶剂萃取分离过程的在线分析。

关键词：镅241 EDXRF 稀土分离溶剂萃取检测

海洋油气处理平台用ABS EH40钢焊接工艺开发

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现代制造技术与装备 2023年第4期59卷 186-188页

作者：刘同开刘殿民董鲁涛梁春荣贾江涛海洋石油工程(青岛)有限公司青岛266520

简要介绍海上浮式储卸油装置上部工艺模块中出现的材料ABS EH40标准钢的焊接特性,并选用常用的药芯焊丝焊接工艺开发相应的焊接工艺,同时测试了焊接接头的机械性能和微观金相。试验结果表明,焊接接头强度、塑性及低温韧性符合设计标准,... 详细信息

简要介绍海上浮式储卸油装置上部工艺模块中出现的材料ABS EH40标准钢的焊接特性,并选用常用的药芯焊丝焊接工艺开发相应的焊接工艺,同时测试了焊接接头的机械性能和微观金相。试验结果表明,焊接接头强度、塑性及低温韧性符合设计标准,微观金相组织并无有害组织,焊接工艺开发符合设计需求,可为后续工程同类型钢材施工提供参考。

关键词：钢结构 ABS EH40 焊接工艺微观金相

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保护层连续卸压开采消突效果工程实践应用

山西焦煤科技 2020年第9期44卷 35-40页

作者：李广培贾江涛程海燕郭长亮王子龙王向东平安煤矿瓦斯治理国家工程研究中心有限责任公司安徽淮南232001 华晋焦煤有限责任公司山西吕梁033300

保护层开采是近距离煤层群煤与瓦斯突出矿井区域防突措施中最经济有效的方法之一。因此,为解决沙曲矿煤层群煤与瓦斯突出灾害威胁难题,通过对沙曲一矿二采区2201和2202保护层工作面采取无煤柱沿空留巷的连续卸压开采方式,并同时抽采被... 详细信息

保护层开采是近距离煤层群煤与瓦斯突出矿井区域防突措施中最经济有效的方法之一。因此,为解决沙曲矿煤层群煤与瓦斯突出灾害威胁难题,通过对沙曲一矿二采区2201和2202保护层工作面采取无煤柱沿空留巷的连续卸压开采方式,并同时抽采被保护层3#、4#具有煤与瓦斯突出危险性煤层瓦斯,进而实现被保护层的大面积区域卸压消突。工程结果表明,通过对被保护层4209工作面掘进轨道巷和胶带巷,取得了良好的安全效果,验证了保护层连续卸压开采消突效果,为突出煤层群矿井的高效开采提供了有效的技术借鉴。

关键词：近距离煤层群保护层开采瓦斯突出底板采动破坏深度瓦斯抽采效率区域消突

Design and test of bionic wide-ridge soybean tilling-sowing machine

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International Journal of Agricultural and Biological Engineering 2019年第1期12卷 42-51页

作者： Honglei jia Mingzhuo Guo jiale Zhao Dongyan Huang jian Zhuang jiangtao Qi College of Biological and Agricultural Engineering Jilin UniversityChangchun 130022China Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun 130022China

The insufficient accumulated temperature of the plow layer during spring tillage in Northeast China severely restricts soybean root growth and whole-plant *** regional soil viscosity further complicates *** order to seek a solution to these problems,field comparative tests were conducted to investigate the effects of shallow-loosening(SL)and reshaping ridge(RR)on soil temperature and soybean root *** with conventional tillage(CT),SL and RR significantly increased the soil temperatures within 0-25 cm(p<0.05)and 0-15 cm(p<0.05),*** particular,higher soil temperature within 15-25 cm was established after SL than after RR(p<0.05).Additionally,SL promoted substantially more vigorous soybean development(seedling height)than RR(p<0.05),which in turn led to a significant outperformance over CT(p<0.05).Further,bionics,reverse engineering,and curve fitting were combined to design a hare claw toe bionic shallow-loosening shovel and a pangolin scale bionic ridging shovel with anti-drag *** verification tests confirmed that these two bionic tillage devices outperformed the conventional tillage device in reducing tractive drag by 13%-19%.Based on the results of these tests,a 2BGD-6(110)bionic wide-ridge soybean tilling-sowing machine was designed,which was capable of shallow-loosening,reshaping ridge and *** new machine significantly reduced the tractive drag,efficiently loosened the soil,increased soil temperature,and accelerated soybean root *** study can provide a theoretical and practical reference for soybean production in Northeast China.

关键词： bionics tillage shallow-loosening soybean reshaping ridge soil temperature

Design and test of fault monitoring system for corn precision planter

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International Journal of Agricultural and Biological Engineering 2015年第6期8卷 13-19页

作者： Qi jiangtao jia Honglei Li Yang Yu Haibo Liu Xinhui Lan Yubin Feng Xianzhen Yang Yongxi Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchun 130022China College of Mechanical Science and Engineering Jilin UniversityChangchun 130022China College of Engineering South China Agricultural UniversityGuangzhou 510642China

With the growing demand and working complexity of corn precision planter,it becomes more important to monitor the working performance through intelligent systems.A new fault monitoring system for corn precision planters was designed and *** system consisted of the information acquisition module,controller module,alarm module,input module and display module.A capacitive sensor was utilized to monitor the seed flow without changing the track of a precision *** system can monitor the whole sowing process of a seed-metering device in *** sowing status,fault type and fault location can be displayed on liquid crystal display(LCD).Warning light on the LCD reminds the operator of abnormal *** tests and field tests showed that the minimum monitoring accuracies of missing sowing and total sowing number were 92.11%and 94.28%,respectively,and the seed level sensor and the opener sensor worked *** system can accurately prompt the seed-metering mechanism in real-time.

关键词： corn precision planter fault monitoring system precision agriculture capacitive sensor missing sowing

百特SPS1550型血液透析机FL08故障分析

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中国医学装备 2005年第8期2卷 50-50页

作者：贾江涛彭平冀长治医学院附属和平医院设备科山西046000

介绍百特SPS1550型血液透析机FL08故障现象、分析、原因与处理。

关键词：血液透析机超滤控制器流量传感器

Synthesis, Structure and Characterization of Y-Al-Cr Red Pigment

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Journal of Rare Earths 2006年第3期 385-385页

作者： Wang Shuang 1,2, jia jiangtao 1,2, Liao Chunsheng 1,2, Yan Zhengguang1, Yan Chunhua 1* (1. State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing 100871, China 2. Beijing Institute of Founder Rare Earth Sci. & Tech. Co., Ltd., Beijing 100085, China)

The garnet-structured Y-Al-Cr red pigment was synthesized by a solid-state reaction. The optimal synthetic conditions, such as reaction temperature （1000～1400 ℃） and time （1～2 h）, molar ratio of Y2O3to Al2O3（0.5～1.5）, and the doping concentration （0.3%～5%） of Cr2O3, were systematically studied. The visible reflection spectroscopy is employed to characterize the intensity and chromaticity of the pigment. Besides the reaction conditions, the structure and particle size also affect the chromaticity of the products. Y-Al-Cr pigment, synthesized at 1300 ℃ for 1 h, with the molar ratio of Y2O3to Al2O3of 1∶1 and the content of Cr2O3of 3%, performs the satisfactory brightness, chromaticity, and structural stability even at high temperature.

关键词： garnet-structure Y-Al-Cr composite rare earth pigment solid-state reaction