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RADIATION FIELD FROM A RECTANGULAR PLAQUE SOURCE FOR RADIATION PROCESSING
《Nuclear Science and Techniques》1993年第3期171-175,共5页冯永样 李志良 李盘林 许梦杰 
Evaluation of the Hubbell integral for an omnidirectional detector response to a rectangular plaque gamma emitting radiation source using a different numerical computation method on a personal computer was made. For a...
关键词：NUMERICAL solution 60Co SOURCE RADIOACTIVITY Hubbell INTEGRAL 
THE COMPARATION OF THE TUMOR INCIDENCE OF THE DUCKS REARED IN DIFFERENT SOURCE OF WATER IN THE SUBURBS OF SHANGHAI
《癌变．畸变．突变》1991年第S1期29-29,共1页
In order to evaluate the carcinogeni-city of two kinds of different source ofwater to the ducks,the tumor incidence ofthe ducks lived in the suburbs of Shanghaiwere investigated and analyzed.
关键词：SOURCE INCIDENCE LIVED FARMLAND river contr ROLLED 
Polycyclic aromatic hydrocarbon in urban soil from Beijing, China被引量：51
《Journal of Environmental Sciences》2006年第5期944-950,共7页LI Xing-hong MA Ling-ling LIU Xiu-fen FU Shan CHENG Hang-xin XU Xiao-bai 
The Major State Basic Research Program of China (No. G1999045707) and the Knowledge Innovation Program of the ChineseAcademy of Sciences (No. RCEES 9902; 9906)
Polycyclic aromatic hydrocarbons （EPA-PAHs） in the urban surface soils from Beijing were determined using gas chromatography and mass spectrometry （GC-MS）. It is significantly complementary for understanding the P...
关键词：PAHS urban soil SOURCE BEIJING 
The impacts of agricultural and rural economic policy system on agricultural non-point source pollution in China被引量：2
《Journal of Environmental Science and Engineering》2008年第5期59-63,共5页LIU Fang SHEN Zhen-yao GONG Yong-wei 
Agricultural and rural economic policy system is one main driving force for the evolvement of agricultural Non-Point Source （NPS） pollution. In this paper, the main policies that influence agricultural NPS pollution...
关键词：agricultural and rural economic policy system agricultural non-point source pollution impact analysis 
Weak Seismic Signal Extraction Based on the Curvelet Transform被引量：1
《Earthquake Research in China》2019年第2期220-234,共15页TAN Junqing YANG Runhai WANG Bin XIANG Ya 
sponsored by the National Natural Science Foundation of China(41574059,41474048);sponsored by the State Key Laboratory of Earthquake Dynamics,CEA(LED2016B06)
Seismic signal denoising is a key step in seismic data processing.Airgun signals are easy to be interfered with by noise when it travels a long distance due to the weak energy of active source signal of the airgun.Aim...
关键词：SEISMIC SIGNAL DENOISING Airgun active source SIGNAL CURVELET transform The velocity of the UNDERGROUND medium 
胶原蛋白的提取与应用
《明胶科学与技术》2018年第3期109-114,共6页蒋彩云 
胶原蛋白是一种天然高分子,具有优良的生物学性能,可以促进凝血、细胞生长、伤口修复等。哺乳动物和鱼类体内含有大量的胶原蛋白,如果充分利用,既可以增加产品附加值又可以缓解环境问题。本文叙述了胶原蛋白的提取方法与当前应用,为开...
关键词：胶原蛋白 性质 来源 提取 应用 
浑河沈阳段典型抗生素污染分布及风险评价被引量：2
《品牌与标准化》2023年第3期174-177,180,共5页徐洪波 刘维钧 李晶 李哲 祝琳琳 
利用固相萃取-高效液相色谱质谱法调查了四类16种典型抗生素在浑河沈阳段的含量、时间和空间分布特征。结果显示,在浑河沈阳段干流和支流的10个点位中检测出12种抗生素。16种抗生素在城市污水处理厂与附近支流河之间皮尔森相关性显著,...
关键词：抗生素 浑河沈阳段 污染分布 生态风险评价 
Species profile and reactivity of volatile organic compounds emission in solvent uses,industry activities and from vehicular tunnels被引量：2
《Journal of Environmental Sciences》2024年第1期546-559,共14页Haimei Huang Zhangwei Wang Chunhao Dai Hai Wu Jia Guo Chunjie Wang Xiaoshan Zhang 
the Guiyang Research Academy of Eco-Environmental Science for partial support of this project。
A survey was conducted of the volatile organic compounds(VOCs)released from sources of solvent use,industry activities and vehicle emissions in Guiyang,a capital city of China.Samples were collected by canisters and a...
关键词：Volatile organic compounds(VOCs) Species profile BTEX ratio Source reactivity 
杂交水稻叶片衰老的研究被引量：1
《孝感学院学报》2001年第3期66-67,共2页黄升谋 郭兆武 
在杂交水稻开花期间 ,通过剪去穗部部分枝梗和叶片等处理 ,形成不同的库源比 ,结果表明 ,杂交水稻W61 54S/早特青源库矛盾大 ,叶片衰老快 ,降低库源比能明显减缓其叶片中蛋白质、叶绿素含量下降和丙二醛含量上升 ,说明杂交水稻叶片早衰...
关键词：杂交水稻 叶片衰老 库源比 开花期 蛋白质 叶绿素 丙二醛 
Numerical analysis of thermal process in continuous drive radial friction welding被引量：1
《China Welding》2015年第1期18-24,共7页秦国梁 梁永亮 耿培皓 王严 周军 
This work was suooorted by National Natural Science Foundation of China （Grant No. 51075174/E050803 ）.
A heat source model for radial friction welding was proposed, which was determined by friction pressure, friction coefficient, material properties and extrusion speed of material. A 3D model was established to analyze...
关键词：radial friction welding heat source model temperature field thermal cycle 
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