检索结果-南通市图书馆

Simulation of Potential Production and Optimum Population Quantitative Indices for the Second Hybrid Rice

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2006年第7期5卷 498-505页

作者： YAN Li-Jiao YAO zhong ZHENG zhi-ming LI Hua-bin Agro-Ecology Institute Life Science College Zhejiang University Hangzhou 310029 P.R.China

The article established the HDRICE model by modifying the structure of the ORYZA1 model and revising its parameters by field experiments. The HDRICE model consists of the modules of morphological development of rice, daily dry matter accumulation and partitioning, daily CO2 assimilation of the canopy, leaf area, and tiller development. The model preferably simulated the dynamic rice development because of the thorough integration of the effects of temperature and light on the rates of rice development, photosynthesis, respiration, and. other ecophysiological processes. In addition, this model has attainable grain yield in the test experiment that showed the potential yield of cultivar Xieyou 46 ranged from 11 to 13 tons ha-~. Besides, the model was used to optimize the combinations of the transplanting date, seedling age and density for cultivar Xieyou 46 at Jinhua area, and the population quantitative indices to attain the potential yield such as maximum stems, effective panicles, filled grain number/leaf area, and so on. The result showed that the combination of transplanting date on July 25, seedling age of 35 days and base seedling density of 1.33 x 106ha-1 is the optimum combination for the second hybrid rice production in Jinhua County, China. And the maximum stems, the effective panicles, the filled grain per panicle, the peak of optimum LAI, LAI in later filling stage, and the filled grain number/leaf were 6.03×10^6ha, 3.99×10^6ha, 119.2, 8.59, 5-6, and 0.64, respectively.

关键词： simulation model potential production optimum population quantitative indices second hybrid rice

Electronic structure and photoelectron spectrum Assignment of allene

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 1993年第5期11卷 406-411页

作者： WANG,zhi-zhong YANG,ming YANG,zhong-zhi Institute of Theoretical Chemistry and State Key Laboratory of Computational Theoretical Chemistry,Jilin University,Changchun,Jilin 130023 Institute of Theoretical Chemistry and State Key Laboratory of Computational Theoretical Chemistry Jilin University Changchun Jilin 130023

In this paper a series of ab initio SCF and configuration calculations were reported for the ground state and excited states X^2E, A^2E,~2B_2 and ~2A_1 of *** ground state X^2E Jahn- Teller distorsion was discussed and a twisted angle of 50° and a torsional barriers of 0.21—0.51 eV were *** on calculated results,the experimental photoelectron spectrum of allene has been assigned.

关键词： SCF Electronic structure and photoelectron spectrum Assignment of allene Cl

MATHEMATICAL MODEL OF THE MICROBIAL FLOODING

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2003年第4期15卷 104-108页

作者： Lei Guang-lun, Zhang zhong-zhi, Chen Yue-ming Faculty of Chemical Engineering, University of Petroleum, Beijing 102249, China Faculty of Chem. Eng. Univ. of Petroleum Beijing 102249 China

On the basis of growth kinetics of microorganism and the principle ofmaterial balance, equations were derived to describe microbial growth, nutrient consumption,metabolites production and their transport in formation. The changes in porosity, permeability, oilviscosity and capillary force were also described as the main facturs of microbial flooding. Forreservoirs with black oil properties, three-dimensional three-phase mathematical models with thecosidara-tion of multi-microbial components were established to depict microbial flooding oil. Withthis model, calculated results are in good agreement with experimental data.

关键词： microbial flooding enhance oil recovery mathematical model

在线全文

学校读者我要写书评

暂无评论

平朔矿区SO_2的大气环境容量研究

煤炭工程 2011年第5期43卷 94-95,98页

作者：钟志明中国煤炭科工集团北京华宇工程有限公司北京100120

文章应用《制订地方大气污染物排放标准的技术方法》(GB/T 3840-91)中的A值法测算了平朔矿区SO2大气环境容量。测算结果表明:平朔矿区SO2大气环境容量为35512.0t/a,而目前平朔矿区SO2实际排放量为4495.7t/a,矿区规划项目新增SO2排放量为... 详细信息

文章应用《制订地方大气污染物排放标准的技术方法》(GB/T 3840-91)中的A值法测算了平朔矿区SO2大气环境容量。测算结果表明:平朔矿区SO2大气环境容量为35512.0t/a,而目前平朔矿区SO2实际排放量为4495.7t/a,矿区规划项目新增SO2排放量为21528.3t/a。因此平朔矿区仍有9488.0t/a的SO2环境容量剩余,完全可以满足平朔矿区总体规划需要。

关键词： A值法大气环境容量平朔矿区 SO2

在线全文

学校读者我要写书评

暂无评论

大气环境评价工作等级确定方法探讨

煤炭工程 2011年第6期43卷 24-25页

作者：钟志明中国煤炭科工集团北京华宇工程有限公司北京100120

文章介绍了采用《大气污染物综合排放标准》(GB16297-1996)中等效污染源的计算方法,利用新大气导则推荐的估算模式,预测等效污染源最大地面质量浓度及其占标率,能准确、定量的确定多个相距较近污染源排放项目的大气环境评价工作等级,为... 详细信息

文章介绍了采用《大气污染物综合排放标准》(GB16297-1996)中等效污染源的计算方法,利用新大气导则推荐的估算模式,预测等效污染源最大地面质量浓度及其占标率,能准确、定量的确定多个相距较近污染源排放项目的大气环境评价工作等级,为环境影响评价提供一种确定大气环境评价工作等级的方法。

关键词：大气环境评价工作等级等效污染源大气导则

燃煤机组退役与技术升级的减排及经济效益研究——基于鲁棒电源规划的方法

在线全文

学校读者我要写书评

暂无评论

中国管理科学 2021年第4期29卷 16-25页

作者：钟志鸣李星梅华北电力大学经济与管理学院北京102206 新能源电力与低碳发展研究北京市重点实验室(华北电力大学) 北京102206

火电行业是中国推行节能减排战略所重点关注的行业之一。为了降低高污染燃煤机组对环境的不利影响,中国近年来出台了一系列的能源政策,鼓励淘汰高污染的燃煤机组或者对其进行超低排放改造的技术升级。本文研究了燃煤机组主动退役及超低... 详细信息

火电行业是中国推行节能减排战略所重点关注的行业之一。为了降低高污染燃煤机组对环境的不利影响,中国近年来出台了一系列的能源政策,鼓励淘汰高污染的燃煤机组或者对其进行超低排放改造的技术升级。本文研究了燃煤机组主动退役及超低排放改造升级的环境及经济的双重效益。基于电源投资规划鲁棒优化的方法,考虑了受不确定的环保税、超低排放机组上网电价的补贴及电能需求影响下的发电机组最优配置问题,构建了含两阶段决策的三层鲁棒优化模型。该模型是一类具有多个不确定场景耦合特征的大规模优化问题。为了求解的便利,采用列与约束生成(column and constraint generation,CCG)算法进行求解。算例分析结果显示,当考虑了燃煤机组主动退役及超低排放改造升级的决策时,本文构建模型所提供的最优电源结构方案能够有效地降低各类污染物的排放,同时提升发电企业的经济性。

关键词：燃煤机组退役超低排放改造鲁棒优化电源规划

Dynamic Regulation of Hydrogen Bonding Networks and Solvation Structures for Synergistic Solar‑Thermal Desalination of Seawater and Catalytic Degradation of Organic Pollutants

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 548-565页

作者： ming‑Yuan Yu Jing Wu Guang Yin Fan‑Zhen Jiao zhong‑Zhen Yu Jin Qu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although solar steam generation strategy is efficient in desalinating seawater,it is still challenging to achieve continuous solar-thermal desalination of seawater and catalytic degradation of organic ***,dynamic regulations of hydrogen bonding networks and solvation structures are realized by designing an asymmetric bilayer membrane consisting of a bacterial cellulose/carbon nanotube/Co_(2)(OH)_(2)CO_(3)nanorod top layer and a bacterial cellulose/Co_(2)(OH)_(2)CO_(3)nanorod(BCH)bottom ***,the hydrogen bonding networks inside the membrane can be tuned by the rich surface–OH groups of the bacterial cellulose and Co_(2)(OH)_(2)CO_(3)as well as the ions and radicals in situ generated during the catalysis ***,both SO_(4)^(2−)and HSO_(5)−can regulate the solvation structure of Na^(+)and be adsorbed more preferentially on the evaporation surface than Cl^(−),thus hindering the de-solvation of the solvated Na^(+)and subsequent nucleation/growth of ***,the heat generated by the solar-thermal energy conversion can accelerate the reaction kinetics and enhance the catalytic degradation *** work provides a flow-bed water purification system with an asymmetric solar-thermal and catalytic membrane for synergistic solar thermal desalination of seawater/brine and catalytic degradation of organic pollutants.

关键词： Solar steam generation Seawater desalination Catalytic degradation Bacterial cellulose Cobalt hydroxycarbonate nanorods

Thickness and sp3 bond modulation of（Ti/tetrahedral amorphous carbon）_n multilayer coatings

在线全文

学校读者我要写书评

暂无评论

Tungsten 2025年第1期7卷 152-160页

作者： zhi-Jun Xie Jia-Lin Li Ling Gong Xiang-Li zhong Hong-Jia Song Jin-Bin Wang National-Provincial Laboratory of Special Function Thin Film Materials School of Materials Science and Engineering Xiangtan University

The durability of wear-resistant tetrahedral amorphous carbon（ta-C） coatings is intimately linked to their thickness and the concentration of *** enhance the lifespan of the coatings,we have prepared a multilayer coating consisting of alternating layers of Ti and ta-C,denoted as（Ti/ta-C）_n,using arc ion plating.A multi-layer structure in conjunction with stage cooling is employed to enhance the thickness and promote *** results indicate that the ID/IGvalue,representing the ratio of the intensity of the D peak to that of the G peak in Raman spectroscopy,decreases from 0.85 when no stage cooling is applied to 0.35 when stage cooling is employed,suggesting an enhancement in the fraction of sp3bonds within the *** obtained（Ti/ta-C）_n multilayer coating without peeling off has a maximum thickness of 1.14 μm,which is almost double that of the ta-C coating single layer *** the same time,the coating has a low coefficient of friction,down to 0.069,and maintains excellent friction properties with a wear rate of 3.4×10-6mm3·N-1·*** results conclusively show that the preparation technology can enhance both thickness and sp3bonding in ta-C coatings,significantly expanding their utility across tools,molds,and precision engineering components.

关键词： Arc ion plating Multilayer structure sp3 bond Ta-C coating Wear resistance

QuEChERS结合PTV-GC-MS/MS测定食用菌中多种农药残留

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

分析试验室 2016年第6期35卷 648-653页

作者：钟志铭黄子敬符靖雯惠州市农业信息中心惠州516008 惠州市农产品质量安全监督检测中心惠州516008

应用Qu ECh ERS技术对食用菌中73种农药残留物进行提取、净化,在气相色谱-串联质谱（PTV-GC-MS/MS）上以Rxi-5Sil MS毛细管柱实现分离。通过优化质谱参数,提高灵敏度、降低基质及农药重叠峰干扰,以保留时间和多反应监测（MRM）离子对定... 详细信息

应用Qu ECh ERS技术对食用菌中73种农药残留物进行提取、净化,在气相色谱-串联质谱（PTV-GC-MS/MS）上以Rxi-5Sil MS毛细管柱实现分离。通过优化质谱参数,提高灵敏度、降低基质及农药重叠峰干扰,以保留时间和多反应监测（MRM）离子对定性、峰面积定量。73种农药线性关系良好,相关系数大于0.99,在3个添加水平下的平均回收率为67.1%～111.4%,相对标准偏差为1.2%～11%,检出限（LOD）为0.1～8.9μg/kg。方法适用于食用菌中多农药残留的快速测定。

关键词：食用菌 QuEChERS 农药残留程序升温汽化(PTV) GC-MS/MS