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Search Results: 1 - 10 of 71032 matches for " WEI Zi-min "
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DING Bo,ZHANG Ya-ping,LIU Zi-min,WEI Yi,

动物学研究 , 1999,
Abstract: 为确定白头叶猴的分类地位,分析了菲氏叶猴、紫面叶猴、长尾叶猴、黑叶猴、白头叶猴、共13个个体的随机扩增DNA多态。用于检测的30个随机引物中有22个产生清晰的条带。根据遗传距离建立的系统树显示,黑叶猴与白头叶猴亲缘关系最近,且两者都不是单系群。白头叶猴3与黑叶猴6的亲缘关系比与白头叶猴1、2的更近。根据系统树中的关系对群体进行了t检验,结果显示:在5%水平上,白头叶猴与黑叶猴有显著差异;然而,在同
Comment on "Comment on "Integrability of the Rabi Model""
Murray T. Batchelor,Zi-Min Li
Physics , 2015,
Abstract: In a recent Comment (arXiv:1510.00768) it was claimed that Braak's solution of the quantum Rabi model does not include the set of non-degenerate exceptional points and is thus not a complete solution. Braak's solution does contain these points however, as has been shown before, and which we demonstrate here by obtaining the same energy plots as in the Comment, directly from Braak's solution. Therefore the claim that Braak's solution is not complete is incorrect.
Algebraic equations for the exceptional eigenspectrum of the generalised Rabi model
Zi-Min Li,Murray T. Batchelor
Mathematics , 2015,
Abstract: We obtain the exceptional part of the eigenspectrum of the generalised Rabi model, also known as the driven Rabi model, in terms of the roots of a set of algebraic equations. This approach provides a product form for the wavefunction components and allows an explicit connection with recent results obtained for the wavefunction in terms of truncated confluent Heun functions. Other approaches are also compared. For particular parameter values the exceptional part of the eigenspectrum consists of doubly degenerate crossing points. We give a proof for the number of roots of the constraint polynomials and discuss the number of crossing points.
Relationship Between the Nitrogen Removal and Oxygen Demand in Constructed Wetlands

HE Lian-sheng,LIU Hong-liang,XI Bei-dou,ZHU Ying-bo,WEI Zi-min,HUO Shou-liang,WEI Zi-min,HUO Shou-liang,

环境科学 , 2006,
Abstract: A simplified model of sequential N transformations and sink was applied to investigate the relationship between the nitrogen removal and oxygen demand to verify the validity of full nitrification-denitrification mechanism in a newly-built multi-stages constructed wetlands. Average net rates of N mineralization ranged from 0.01 to 0.28 g x (m2 x d)(-1), nitrification from 0.50 to 1.54 g x (m2 x d)(-1), denitrification from 0.41 to 1.13 g x (m2 x d)(-1)(3.4% approximately 35.4% of measured N removal in different stage) and plant assimilation from 0.07 to 0.26 g x (m2 x d)(-1) in the five tanks. Nitrification and denitrification occurred concurrently with BOD removal, even in the first stage receiving the higher-strength wastewater. Surprisingly, net areal nitrification rates, was correlated with BOD removal rates positively. Nitrification rates were also correlated linearly with average NH4+-N concentrations in the cascade tanks. The nitrogenous oxygen demand (NOD) required to support full nitrification of ammonia and mineralized Org-N in the wetland was in the upper range of that expected to be able to be supplied through surface and plant-mediated oxygen transfer. Some potential alternative nitrogen removal pathways with reduced overall oxygen requirements that have relevance to constructed wetlands were discussed.
Fluorescence characteristic changes of dissolved organic matter during municipal solid waste composting
Wei Zi-min,Xi Bei-dou,Wang Shi-ping,Xu Jing-gang,Zhou Yu-yan,Liu Hong-liang,
Wei ZM
,Xi BD,Wang SP,Xu JG,Zhou YY,Liu HL

环境科学学报(英文版) , 2005,
Abstract: Dissolved organic matter(DOM) of municipal solid waste(MSW) consists of minerals, water, ash and humic substances, and is known to enhance plant growth. In this study, inoculating microbes(ZJ, MS) were used in municipal solid wastes composting, and composting implemented a industrialized technology. During composting, dissolved organic matter was extracted from the compost and purified. The spectral characteristics of dissolved organic matter was determined by fluorescence emission, excitation, and synchronous spectroscopy. Fluorescence emission, excitation, and synchronous spectra characterized by different relative fluorescent intensities and peaks over time. Fluorescence spectra were similar to that of fulvic acid in sewage sludge, indicating the presence of dissolved organic matter with aromatic structures and a high degree of molecular polymerization. Compared with the controls with no microbial inoculation, the microbe-inoculated treatments exhibited the increase of aromatic polycondensation, in the following order: MS ZJ > ZJ > MS > CK.
Influence of Additive on Characteristic of Slag During the Process of Melting Fly Ash from Municipal Solid Waste Incinerator

JIANG Yong-hai,XI Bei-dou,LI Xiu-jin,WANG Qi,ZHANG Xiao-xuan,WEI Zi-min,

环境科学 , 2006,
Abstract: A kind of compound additive was studied and prepared in the paper, which associated with many functions. Using typical fly ash of Shanghai and Fuzhou, We studied the effect of the additive on evaporation rate, flowing temperature, fixed rate of heavy metals and its leaching characteristics in melting slag in the process of melting fly ash. The result showed that the flowing temperature and the evaporation rate of fly ash could be respectively reduced approximately 150 degrees C and 10% - 20% by adding 10% additive, and the fixed rate of heavy metals Cu and Pb increased 10% - 20%, especially Zn, which could increase 40%. The amount of leaching heavy metals in melting slag were both under corresponding standard limits using either national toxicity leaching methods or TCLP of EPA.
Inoculating Microbes on Municipal Solid Wastes Composting Affects Organic Acids and Maturity

WEI Zi-min,XI Bei-dou,ZHAO Yue,WANG Shi-ping,XU Jing-gang,LIU Hong-liang,

环境科学 , 2006,
Abstract: Inoculating microbes(Meishang compound microbes,MS;Zhongjia fermentation microbes,ZJ) on municipal solid wastes composting which adopted industrialized technology was studied.The dynamic changes of low molecule weight organic acid and high molecule weight humic substance were discussed.The results show that inoculating microbes on municipal solid wastes composting could increase the content of organic acid at initial stage of composting,and decrease that at final stage.But humic substance and humic acid decline at the initial stage,then increase at the final stage of composting.The dynamic changes of organic acid and humification index indicate that inoculating microbes on municipal solid wastes can obviously increase the maturity of composting,and order as follow: MS+ZJ>ZJ>MS>CK.
Effect of Municipal Solid Waste Composting on Availability of Insoluble Phosphate

WEI Zi-min,WANG Shi-ping,XI Bei-dou,ZHAO Yue,LIU Hong-liang,

环境科学 , 2007,
Abstract: During municipal solid waste (MSW) composting, both organic acid production and sparingly soluble inorganic phosphate solubilization occur simultaneously. In this study, compost consisted of residual MSW with metal, plastic and glass removed, and sparingly soluble phosphate (ground rock phosphate) was mixed in municipal solid wastes composting. The effects of composting on soluhilization of sparingly soluble phosphate as well as the effects of compost production (P-enriched MSW compost) on soil rapidly available phosphorus were studied. Mixing ground rock phosphate into composting, rapidly available phosphorus increase at initial stage, achieved maximum at medium stage, and stabilize at final stage of MSW composting. At final stage of composting, the content of rapidly available phosphorus in treatment P1 and P2 increase respectively by 0.87 g x kg(-1), 0.76 g x kg(-1) compared with that with no mixing ground rock phosphate. Scanning electron microscopy (SEM) reveals a number of cavities in ground rock phosphate surface. After compost products amended soil, the content of soil rapidly available phosphorus and acid phosphatase activity of P-enriched MSW compost amendment increase obviously compared with MSW compost, chicken manure compost, and chemical fertilizer amendment during crop duration.
Effect of Different Extractants on Leaching Characteristics of the Fly Ash from Municipal Solid Waste Incinerator

JIANG Yong-hai,XI Bei-dou,LI Xiu-jin,ZHANG Xiao-xuan,WEI Zi-min,

环境科学 , 2007,
Abstract: The effect of three extractants, which are HNO3/NaOH, CH3COOH/NaOH, and HNO3-H2SO4 , on leaching characteristics of the fly ash from municipal solid waste incinerator (MSWI) was investigated. The results showed that: (1) different extractants had different buffering capacities for the leaching solutions of the fly ash from MSWI, which are in the order of HAC > HNO3-H2SO4 > HNO3. (2) HAC showed better dissolvability to Zn, Cd, and Cr than HNO3-H2SO4, under more acidic condition, but the leaching concentration of Pb was not affected by extractant types obviously. (3) The leaching concentrations of Pb and Zn reached their maximal values at the ratio of liquid to solid of 40, while Cd leaching concentration did at the ratio of 20, and the leaching concentrations of Zn, Pb, Cd, and Cr decreased gradually with the increase of the ratios of liquid/solid when HNO3 and HNO3-H2SO4 extractants were used.
Mineralization Characteristics of Dissolved Organic Phosphorous in Wudalianchi Lake, China

ZHANG Bin,XI Bei-dou,ZHAO Yue,WEI Zi-min,BAI Xue,WANG Man-lin,

环境科学 , 2012,
Abstract: The mineralization experiment of dissolved organic phosphorous was carried out in the filtered water samples collected in Wudalianchi Lake, in October, 2010.The concentrations of dissolved reactive phosphorus (DRP), dissolved organic phosphorous (DOP) and microbial number were analyzed by continuous sampling. The research showed that in the mineralization process, in the three sampling stations (W3SB, W3XB, W5B), the DRP concentrations of W3SB and W5B were similar, and generally higher than that for W3XB, the DRP concentration showed an upward trend, increasing by 50.00 times (W5B), 29.00 times (W3XB), 2.50 times (W3SB), respectively. The DOP concentration showed a downward trend, decreasing by 85.58% (W3XB), 77.83% (W5B) and 68.00% (W3SB), respectively. The mineralization rate of DOP also showed a downward trend, the mineralization rate of W5B was significantly higher than that for W3SB and W3XB, the largest mineralization rate of DOP of W5B was 14.10×10-4 mg·(L·d)-1. The microbial number showed an upward trend. The positive correlation was found between the microbial number and DRP concentration (r=0.528, P<0.05), the negative correlation was found between the microbial number and DOP concentration (r=-0.482, P<0.05).
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