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The Effect of Rare earth on the Activity of Methanol Synthesis Catalyst

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Chinese Chemical Letters 1999年第8期10卷 691-692页

作者： Hong Tao MA Guo Cai DENG Xian Zhi GUO Run Ti CHEN (Department of Chemistry. Nankai university, Tianjin 3.0071) Nankai Univ Dept Chem Tianjin 300071 Peoples R China

In this paper several rare earth oxides were added into methanol synthesis catalyst by solid-mixing method to improve the activity of methanol synthesis catalyst. Nd2O3. CeO2, La2O3.and Sm2O3.decrease the catalyst act... 详细信息

关键词： rare earth methanol synthesis catalyst

Pollination Efficiency of Amegilla calens (Hymenoptera: Apidae) on Gossypium hirsutum L. (Malvaceae) Variety L457 Flowers at Meskine (Maroua, Cameroon)

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EFFECTS OF SILICON ON THE GROWTH OF WHEAT UNDER DROUGHT

Agricultural sciences（农业科学） 2021年第10期

作者： Issaya Kodji Issaya Beaudelaine Stephanie Kengni Sidonie Fameni Tope Fernand-Nestor Tchuenguem Fohouo(Department of Biological sciences faculty of Science university of Maroua Maroua Cameroon)

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EFFECTS OF SILICON ON THE GROWTH OF WHEAT UNDER DROUGHT

净化H_2S气体的CoSPc改性炭的性能研究

中国植物生理学会全国学术年会暨成立40周年庆祝大会

作者： Hai-jun Gong Kun-ming Chen Guo-cang Chen Suo-min Wang and Cheng-lie Zhang (School of life sciences, Lanzhou university, Lanzhou, 73.000, P R China )

＜正＞ Approximately one third of the world land surface is arid or semi arid, and in China, this ratio is higherup to 47%. Wheat is one of the main crops of human beings, and is growing at the areas of which about 70%are arid and semi arid. Drought often causes decrease or unsteadiness of wheat production. Therefore,studying the drought-tolerance and fertility of wheat is very significant to solve the problem of food *** （Si） is the second most abundant element on the surface of the earth. It is not considered to bean essential element for higher plant. However, there is increasing evidence that Si is not only a cell wallincrustation, responsible for the rigidity of leaves in monocots, but is also involved in physiological *** have shown that silicon promotes the growth of plants. In many cases the growth stimulation is dueto the protection that Si affords plants against the detrimenta effects of abiotic and biotic stresses. Much workhas shown that silicon could control disease,control *** toxicitv of heavy metal. alleviate salt stress,

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武汉理工大学学报 2010年第8期32卷 97-101页

作者：师雁宁平王学谦蒋明昆明理工大学环境科学与工程学院昆明650093

以工业4号活性炭为载体,制备了磺化酞菁钴(CoSPc)改性活性炭,考察了改性活性炭制备工艺条件对净化模拟电石炉尾气中H2S性能的影响;对空白活性炭、改性炭吸附前后进行N2-BET和SEM表征分析。结果表明,H2S的净化效果随NaOH溶液浓度的增加... 详细信息

以工业4号活性炭为载体,制备了磺化酞菁钴(CoSPc)改性活性炭,考察了改性活性炭制备工艺条件对净化模拟电石炉尾气中H2S性能的影响;对空白活性炭、改性炭吸附前后进行N2-BET和SEM表征分析。结果表明,H2S的净化效果随NaOH溶液浓度的增加而增加;当NaOH溶液浓度一定时,NaOH/CoSPc的配比达到100μg/g、干燥温度13.℃、焙烧温度3.0℃为改性活性炭的最佳制备条件。结合N2-BET、SEM和EDS表征分析表明:改性后的活性炭S容量增加,净化效果明显。

关键词：磺化酞菁钴改性活性炭净化硫化氢表征

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影响我国农村居民消费的因素分析及政策研究

山西财经大学学报（高等教育版） 2003年第3期 76-78页

作者：方国斌山西财经大学经济学院山西太原030006

从分析影响我国农村居民消费的因素入手,探讨了当前消费需求不足的原因,提出了制定合理的农村政策,切实提高农民收入的政策建议。

关键词：中国农村居民消费影响因素农村政策农民收入

DETERMINATION OF INDIVIDUAL RARE earthS IN Ho-Er MIXTURE BY RATE DIFFERENTIAL KINETIC METHOD

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Chinese Science Bulletin 1987年第10期32卷 672-677页

作者：陈丹华蔡汝秀林智信曾云鹗 Department of Chemistry Wuhan University Department of Chemistry Wuhan Universityith the increasing application of rare earths in the industrial fields of nuclear energy metallurgy petrochemical engineering and electronics an urgent demand is made on the simple and rapid determination of individual rare earth elements especiallly of those in dose vicinity. Rate differential kinetic method is a useful tool for the task t as considerable

With the increasing application of rare earths in the industrial fields of nuclear energy, metallurgy, petrochemical engineering and electronics, an urgent demand is made on the simple and rapid determination of individual rare earth elements, especiallly of those in dose vicinity. Rate differential kinetic method is a useful tool for the task t as

关键词： urgent electronics petrochemical RATE metallurgy factory charges eliminated vicinity quarter

The Effects of Bisphosphate on Chondrocyte Apoptosis in Adjuvant Arthritis

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The Effects of Bisphosphate on Chondrocyte Apoptosis in Adju...

Text Clustering Algorithm Based on Spectral Graph Seriation

第三届国际骨质疏松及骨矿盐疾病学术会议

作者： CAO Yongping~1 YANG Xin~1 LIU Chao~1 WEN Licheng~1 Satoshi Mori~2 Tomoyuki Akiyama~2 Tasuku Mashiba~2 1 Department of Orthopaedic Surgery Peking university First Hospital Beijing 10003. China 2 Department of Orthopedic Surgery Medical faculty Kagawa university Japan

＜正＞Objective:To investigate the effects of bisphosphate on chondrocyte apoptosis in rat adjuvant arthritis. Method:Eighty seven-week-old female Lewis rats were randomly allocated into 4 groups（20 rats per group）:normal control group（NV）, arthritic control group（SV）,low dose therapy group（S（?）-10）,high dose therapy group（S（?）-100）.

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Text Clustering Algorithm Based on Spectral Graph Seriation

2009中国控制与决策会议

作者： Guo Wensheng~1,Li Guohe~2 1.Department of Computer Science and Technology,China university of Petroleum-Beijing,Beijing Changping 102249 Key Laboratory of earth Prospecting and Information Technology Beijing,Beijing Changping 102249 2.Department of Computer Science and Technology,China university of Petroleum-Beijing,Beijing Changping 102249

＜正＞In the field of information processing,most of the existing text clustering algorithm is based on Vector Space Model（VSM）.However,VSM can not effectively express the structure of the text so that it can not fully express the semantic information of the *** order to improve the ability of expression in the semantic information,this paper presents a new text structure graph *** the weighted graph,this model expresses the characteristics term of the text and its associated location *** this basis of spectral graph seriation,a spectral clustering algorithm is put *** algorithm replace solving common subgraph with matrix computation,then reduce the computational complexity of graph *** are also algorithm analysis and experiment in the *** results of the study show that the text clustering algorithm based on spectral graph seriation is effective and feasible.

关键词： Graph Model Spectral Graph Theory Text Clustering

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桩土接触面单元参数分析

探矿工程 2002年第5期 10-12页

作者：许宏发吴华杰郭少平廖铁平南京大学地球科学系江苏南京210093 解放军理工大学工程兵工程学院江苏南京210007 总参兵种部北京第八干休所北京100044

桩的抗拔特性与接触面的特性密切相关 ,正确选定接触面的力学参数对于分析桩的抗拔机理有重要意义。根据桩土接触面点面接触模型和库仑摩擦变形原理 ,在 1 0组土 -结构 (钢、混凝土 )剪切摩擦试验分析的基础上 ,对桩土接触面摩擦参数的... 详细信息

桩的抗拔特性与接触面的特性密切相关 ,正确选定接触面的力学参数对于分析桩的抗拔机理有重要意义。根据桩土接触面点面接触模型和库仑摩擦变形原理 ,在 1 0组土 -结构 (钢、混凝土 )剪切摩擦试验分析的基础上 ,对桩土接触面摩擦参数的取值问题进行了研究 ,得到了一些结论 ,对于桩土接触面力学参数正确取值有一定的参考价值。

关键词：桩土接触面桩端阻力力学性质抗拔特性摩阻力系数桩侧摩阻力