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Modeling on Heat and Mass Transfer in Stored Wheat during Forced Cooling Ventilation

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Journal of Thermal Science 2010年第2期19卷 167-172页

作者： Yuancheng WANG,Haifeng DUAN,Hao ZHANG and Zhaohong FANG college of Thermal Energy Engineering,shandong Jianzhu university,Jinan 250101,china college of Thermal Energy Engineering Shandong Jianzhu University Jinan China

A mathematical model based on the theory of heat and mass transfer in porous media was developed to simulate the evolution of grain temperature and moisture content in a wheat storage bin during ventilation with cooling air at the constant temperature and *** the previous works on this aspect,the present work was not focused on cooling the stored grain by ventilation with ambient air,but with the refrigerated *** was performed by comparing between predicted and measured grain temperature and grain moisture content for two *** data were in reasonable good agreement with measured *** model and the parameter values used in the model are applicable for predicting temperature and moisture of stored grains under ventilation conditions.

关键词： Heat and moisture transfer Numerical simulation Aeration Stored grains

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

Irregular wavelet frames on L^2 (R^n)

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Science china Mathematics 2005年第2期48卷 277-287页

作者： YANG Deyun & ZHOU Xingwei Department of Information & Technology, Nankai university, Tianjin 300071, china Department of Mathematics, Nankai university, Tianjin 300071, china Department of Computer Science, Taishan college, taian 271000, china Department of Information & Technology Nankai University Tianjin China Department of Mathematics Nankai University Tianjin China Department of Computer Science Taishan College Taian China

In this paper, we present the conditions on dilation parameter {sj}j that ensure a discrete irregular wavelet system to be a frame on L2(Rn), and for the wavelet frame we consider the perturbations of translation para... 详细信息

关键词： wavelet transform, frame, wavelet frame, irregular dilation.

Distribution　and　Transformation　of　Native　and　Added　Ni　Fractions　in　Purple　Soils　from　Sichuan　Province

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Pedosphere 1996年第2期6卷 183-192页

作者： TU CONG(college of Resources and Environment,Southwest agricultural university,Chonyqiny 630716 china) college of Resources and Environment Southwest Agricultural University Chongqing 630716 China

The distribution and transformation of added and native Ni in purple soils were investigated with both sequential extraction procedure and isotopic tracer *** distribution of added and native Ni was greatly dependent on soil *** soil PH was favorable for soluble plus exchangeable (EX) Fraction,while Fe/Mn oxides and clay for Fe/Mn oxide bound (OX) and residual (RES) fractions. The added Ni,however,has not yet reached the distribution equilibrium up to the 150th day after *** was reflected in the fact that the proportion of EX fraction from added Ni was 150%-600% as much as that of native Ni, while that of RES fraction was only about 80%.Once entering soil, the applied soluble Ni was rapidly transformed into Other fractions, but the organic complexed (OM) fraction of added Ni was relatively stable during *** carbonate bound(CAB) fraction showed a progressive increase and attained a peak value after 0-14 d of incubation and thereafter decreased gradually. The occurrence time of this peak advanced as initial soil PH increased, but the peak would disappear when initial soil pH was higher than 7.5(or containing free CaCO3). The transformation processes of the EX,OX and RES fractions could be described by Elovich and two-constant rate equstions,and the rates were positively correlated with soil pH,CEC and *** findings could explain why there are differences in ecological and environmental effects of Ni in different soils and at various intervals.

关键词： distribution Ni fraction purple soil tracer technique transformation

Mutual Conversion of Land Use between Urban and Rural Area in the Process of Urbanization: A Case Study of shandong Province

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Chinese Journal of Population,Resources and Environment 2007年第2期5卷 93-96页

作者： Xu Hong college of Population, Resource and Environment, shandong Normal university, Jinan shandong 250014, china college of Population Resource and Environment Shandong Normal University Jinan Shandong 250014 China

Urbanization is one of the driving forces for the land use change in type and structure, and its prominent effect is to convert rural land to urban land. This paper takes Shan-dong Province as an example to analyze the current situation of the mutual conversion between the urban and rural areas from the aspects of the structure of land use, the decreasing tendency of the cultivated land, the changes of land use in urban and rural residential areas. It points out that cultivated land is converted to residential area land, industrial and/or mining area land. The relationship between the urban area land and the cultivated land is more direct; meanwhile, the changes of rural residential area lag behind obviously. The decrease of the cultivated land and the decline of soil quality will be the two difficult problems in the process of urbanization.

关键词： mutual conversion of land use between urban and rural areas structure of land use flow of the cultivated land

BAF Complex Is Closely Related to and Interacts with NF1/CTF and RNA Polymerase Ⅱ in Gene Transcriptional Activation

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Acta Biochimica et Biophysica Sinica 2005年第7期37卷 440-446页

作者： Li-Hui ZHAO~(1,2) Xue-Qing BA~1 Xiao-Guang WANG~3 Xiao-Juan ZHU~1 Li WANG~1 Xian-Lu ZENG~1 1 Institute of Genetics and Cytology,Northeast Normal university,Changchun 130024,china 2 college of Agronomy,Jilin agricultural university,Changchun 130118,china 3 Department of Biology,Changchun Normal college,Changchun 130032,china Institute of Genetics and Cytology Northeast Normal UniversityChangchun 130024 China college of Agronomy Jilin Agricultural UniversityChangchun 130118 China Department of Biology Changchun Normal CollegeChangchun 130032 China

Brg-or hBrm-associated factor (BAF) complexes,a chromatin-remodeling complex family ofmammalian cells,facilitate transcriptional activity by remodeling nucleosome ***1 is the coresubunit of Brg-associated factor *** the present study,we investigated the spatial relationshipbetween Brg1 and nuclear factor 1 (NF1/CTF) and RNA polymerase Ⅱ (RNAP Ⅱ) upon gene transcriptionalactivation in vivo by employing immuno-gold *** data showed that Brg1 was closely co-localizedwith NF1/CTF and RNAP Ⅱ in HeLa ***,the co-immunoprecipitation assay further revealedthat Brg1 can be isolated together with NF1/CTF and RNAP Ⅱ in the ConA-stimulated,but not the resting,T *** combined results suggested that BAF complexes can interact with NF1/CTF and RNAPⅡ,and this interaction is closely dependent on the activation of gene transcription.

关键词： BAF complex NF1/CTF RNAP Ⅱ gene transcription

Investigation on the Surface Coating of Grinding Balls

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Rare Metals 2001年第4期20卷 259-264页

作者： Chengguo Wang1 Yujun Bai1.2 1) college of Materials Science and Engineering, shandong university, Jinan 250061, china 2) Mechanical Department. shandong university of Science and Technology. Jinan 25003), china 山东大学山东济南 250061

The surface coating of grinding balls was investigated experimentally. The results show that a coating may form on the surface of grinding balls when Cr or Al powders are subjected to ball grinding. The plastic deformation of the ball surface plays an important role during the coating formation, and the strong binding force between the powders and the balls is a necessary pre-condition. The thickness of coating increases with the plasticity of the powders and the balls. Annealing the balls with coating will result in an obvious diffusion of the elements in the bonding zone of interface.

关键词： coating ball grinding plastic deformation

The Role of Nitrogen and Sulfur Interaction in Maize Quality(Zea mays L.)

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agricultural Sciences in china 2003年第5期2卷 527-532页

作者： XIE Rui-zhi, DONG Shu-ting, HU Chang-hao and WANG Kong-junAgronomy college , shandong agricultural university, Tai’an 271018 , P.R.china Agronomy college Shandong Agricultural University Tai'an 271018 P. R. China

Two hybrids of maize with different responses to sulfur were used in the pool experiment. The effects of nitrogen and sulfur on the grain quality of maize were evaluated. The results indicated that grain quality changed with the nutrition supply. The contents of proteins, amino acids, soluble sugar, crude fat, oil, N, P, K, S and microelements in the grain were improved due to nitrogen and sulfur fertilizer addition. But the effects of nitrogen and sulfur were not the same. Nitrogen increased starch content of the grain, but S decreased the content. Both N and S enhanced the proportion of amylopectin in starch. Sulfur nutrition significantly improved the grain quality of maize when a large amount of nitrogen was used together. Both hybrids had similar response to N and S treatments.

关键词： Maize (Zea mays L.) Grain quality Nitrogen Sulfur

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论艺术设计基础素描新方法

山东农业大学学报（自然科学版） 2004年第2期35卷 284-289页

作者：李强鞠达青郑阳山东农业大学水利土木工程学院山东泰安271018 山东农业大学林学院山东泰安271018

在中国艺术设计中传统素描训练偏重于绘画技法的传授 ,技法的明暗写实素描为主 ,方法较单一 ,已不能适应当今艺术设计对人材个性的培养要求 ,应积极改革借鉴当今国际先进的素描方法及经验 ,运用现代绘画手段 ,构建起适应现代艺术特别是... 详细信息

在中国艺术设计中传统素描训练偏重于绘画技法的传授 ,技法的明暗写实素描为主 ,方法较单一 ,已不能适应当今艺术设计对人材个性的培养要求 ,应积极改革借鉴当今国际先进的素描方法及经验 ,运用现代绘画手段 ,构建起适应现代艺术特别是艺术设计的现代素描理论体系 ,本文以全新的视角论述了 ,素描形象思维的丰富性及素描技法的多元性。文中基于世界范围内艺术与设计的历史演变 ,基于对视觉思维的整体观照和科学研究 ,就素描与构成、画法系统等视知觉研究主要问题进行了深入的比较研究 ,如传统素描与新素描的比较 ,通过一系列专题及相关练习整合视觉训练课程 ,为设计基础素描改革提供了新方法、新思路。

关键词：艺术设计素描基础多元思维现代艺术现代建筑视觉思维