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Preliminary Retrieval of Aerosol Optical Depth from All-sky Images

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Advances in Atmospheric Sciences 2010年第2期27卷 421-426页

作者：霍娟吕达仁 Key Laboratory for Atmosphere and Global Environment Observation Chinese Academy of Sciences

The relationship between the radiance ratio （radiance at wavelength 450 nm to 650 nm） and aerosol optical depth （AOD） is analyzed in this paper by numerical simulation and a ＂LUT＂（look-up table） approach is then presented for the retrieval of AOD from the radiance ratio. In this LUT approach, the AOD retrieval error depends mainly on the assumption of aerosol types. From the preliminary simulation, a typical error of 15%–20% in AOD obtained from the radiance ratio is estimated, due to neglecting changes in the ground albedo and background atmosphere. At its worst, the AOD error reached a maximum of around 50%, which will be refined in the future. In the latter part of the paper, comparisons are made between AOD from the imager and from the CE-318 sun photometer, both located at Xianghe observatory in Hebei Province （39.75° N, 116.96° E）. This field experiment shows that AOD from the imager is highly correlated with AOD from the sun photometer, with a correlation coefficient of 0.95 and an average retrieval error of around 7%. A contrast experiment confirms the feasibility of retrieving AOD from all-sky images, but more analysis and future research are required to improve the accuracy.

关键词： all-sky image aerosol AOD radiance ratio

Effect of Fertilization on the Impact of Weather Changes on Crop Yield

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Pedosphere 1996年第4期6卷 379-382页

作者： CUI DEJIE and YAO YUANXI (Laiyang Agricultural College, Shandong 2652O0 China) Laiyang Agricultural College Shandong 265200 China

ＥｆｆｅｃｔｏｆＦｅｒｔｉｌｉｚａｔｉｏｎｏｎｔｈｅＩｍｐａｃｔｏｆＷｅａｔｈｅｒＣｈａｎｇｅｓｏｎＣｒｏｐＹｉｅｌｄＣＵＩＤＥＪＩＥａｎｄＹＡＯＹＵＡＮＸＩ（ＬａｉｙａｎｇＡｇｒｉｃｕｌｔｕｒａｌＣｏｌｌｅｇｅ，Ｓ... 详细信息

ＥｆｆｅｃｔｏｆＦｅｒｔｉｌｉｚａｔｉｏｎｏｎｔｈｅＩｍｐａｃｔｏｆＷｅａｔｈｅｒＣｈａｎｇｅｓｏｎＣｒｏｐＹｉｅｌｄＣＵＩＤＥＪＩＥａｎｄＹＡＯＹＵＡＮＸＩ（ＬａｉｙａｎｇＡｇｒｉｃｕｌｔｕｒａｌＣｏｌｌｅｇｅ，Ｓｈａｎｄｏｎｇ２６５２Ｏ０Ｃｈｉｎ...

关键词： climatic factors crop yield long-term fertilization experiment

单层A3钢薄靶在不同头型弹体斜撞击下的失效模式和防护性能研究

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振动与冲击 2018年第1期37卷 27-31,39页

作者：郭子涛郭钊张伟九江学院土木工程和城市建设学院江西九江332005 哈尔滨工业大学高速撞击研究中心哈尔滨150080

利用轻气炮设备对平头、卵形弹进行了以5种角度撞击2 mm单层A3钢薄靶的斜穿甲试验,得到了不同头型弹体在各个角度撞击单层靶的初始-剩余速度曲线及靶板的弹道极限,获得并对比分析了弹体头部形状、撞击角度对靶板的防护性能及失效模式的... 详细信息

利用轻气炮设备对平头、卵形弹进行了以5种角度撞击2 mm单层A3钢薄靶的斜穿甲试验,得到了不同头型弹体在各个角度撞击单层靶的初始-剩余速度曲线及靶板的弹道极限,获得并对比分析了弹体头部形状、撞击角度对靶板的防护性能及失效模式的影响。结果发现,平头弹在各个撞击角度下较卵形弹更容易击穿靶板,撞击角度较大时卵形弹较平头弹更容易发生跳飞现象;靶板的防护性能与弹体造成的靶板损伤和失效模式紧密相关,随着斜撞击角度变大,平头弹造成的靶板局部穿孔毁伤模式逐步由剪切冲塞失效转向以拉伸撕裂失效为主,同时整体结构弯曲和膜变形减小,而薄板在卵形弹斜撞击下的失效模式则以局部斜形非对称花瓣开裂为主。

关键词：单层薄板斜撞击防护性能毁伤特性弹道极限

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海底两万里

MAIN TOPICS, ABSTRACTS ＆ KEY WORDS

作者：儒勒.凡尔纳0e法

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焊接技术 2014年第2期43卷 I0001-I0002页

作者： ZHENG Long-fei FU Li ZHA0 Peng-kang State Key Laboratory of Solidification Processing School of Material Science and Engineering Northwestern Poly- technical University Xi'an 710072 Shaanxi pro. China

Aquaculture Technology Adoption by Fadama Ⅲ Farmers in Niger Delta, Nigeria

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Journal of Northeast Agricultural University(English Edition) 2016年第4期23卷 78-81页

作者： Ovharhe 0 J department of Agricultural Economics and Extension Delta State University Asaba Campus Asaba

This study was conducted in Akwa Ibom, Bayelsa and Delta States of the Niger Delta, Nigeria. It examined the level of adoption of aquaculture technologies by Fadama Ⅲ beneficiaries and assessed the differences in adoption levels on sate basis. Five fish farmers were randomly selected on multiple stage bases from 18 Fadama Users＇ Groups （FUGs） amounting to 90 farmers as the sample size for this study （n=90）. Structured questionnaire was used to elicit information from respondents. Data collected were measured using descriptive and adoption Sigma method analysis. Results obtained revealed that of the 12 selected aquaculture based technologies recommended by Fadama Ⅲ, the ratio of adoption skills ranged from 1 high： 7 medium： 5 low. The adoption levels followed a sequence of earthen ponds preparation being the highest, and stocking density techniques being the lowest. The overall adoption level was 4.20 which implied that the aquaculture farmers were categorized as medium adopters using the Sigma method scale. It was recommended that farmers with adoption levels at medium and low ranges should be focused upon with more teaching sessions by community facilitators and that other extension workers should emulate the strategies used by Fadama Ⅲ in developing farmers.

关键词： adoption aquaculture technology Fadama Ⅲ farmer

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槡σ2, if tsi-tsj ≤σ

中文信息学报 2018年第9期 78-84页

作者： 0,

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风鸣大陆

Effect of different processing methods for the hole transporting layer on the performance of double layer organic light-emitting devices

2015年

作者：缘分0

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Optoelectronics Letters 2007年第4期3卷 282-285页

作者： SU0 Fan YUJun-sheng DENG Jing LOUShuang-ling JIANGYa-dong SchoolofOptoelectronicInformation StateKeyLab．ofElectronicThinFilmsandIntegratedDevicesUniversityofElectronicScienceandTechnologyChengdu610054China

The hole transporting layer （HTL） of organic light-emitting device （OLED） was processed by vacuum deposition and spin coating method, respectively, where N,N＇-biphenyl-N, N＇-bis（3-methylphenyl）- 1, l＇-biphenyl-4,4＇ -diamine （TPD） and poly （vinylcarbazole）（PVK） acted as the hole-transport materials. Tris-（8-hydroxyquinoline）- aluminum （Alq3） was utilized as both the light-emitting layer and the electron transporting layer. The basic structure of the device cell was： indium-tin-oxide （1TO）/PVK ： TPD/Alq3/Mg：Ag. The electroluminescent （EL） characteristics of devices were characterized. The results showed that the peak of EL spectra was located at 530 nm, which conformed to the characterizing spectrum of Alq3. Compared with using vacuum deposition method, the green emission with a maximum luminance up to 26135 cd/m2 could be achieved at a drive voltage of 15 V by selecting proper solvent using spin-coating technique, and its maximum lumi nance efficiency was 2.56 lm/W at a drive voltage of 5.5 V.

关键词：空穴转运层有机发光装置真空沉积自旋