检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

污泥中抗生素热解特性及动力学分析

环境工程学报 2017年第9期11卷 5213-5219页

作者：李杰潘兰佳余广炜尤甫天谢胜禹汪印中国科学院城市环境研究所中国科学院城市污染物转化重点实验室厦门361021 中国科学院大学北京100049

通过分析污泥中3种典型抗生素环丙沙星(CIP)、土霉素(OTC)和磺胺二甲嘧啶(SM2)的热解过程与失重特性,研究其热解动力学特征。结果表明:CIP、OTC、SM2主要热解温度区间分别为150~625℃、220~600℃、260~480℃;初始热解温度以及最大失重... 详细信息

通过分析污泥中3种典型抗生素环丙沙星(CIP)、土霉素(OTC)和磺胺二甲嘧啶(SM2)的热解过程与失重特性,研究其热解动力学特征。结果表明:CIP、OTC、SM2主要热解温度区间分别为150~625℃、220~600℃、260~480℃;初始热解温度以及最大失重峰对应温度均为OTC

关键词：环丙沙星土霉素磺胺二甲嘧啶热解动力学活化能

在线全文

学校读者我要写书评

暂无评论

地震体波成像中的几个问题

地球物理学进展 1999年第4期14卷 9-17页

作者：陈辉刘福田游庆瑜何建坤闫晓蔚中国科学院地球物理研究所北京100101

本文在论述地震体波成像中速度模型间断面的引入、体波多震相的利用等优越性的同时,利用研究区之外、能改善或分辨地球内部更深处的远震资料,得到研究区平均相对走时残差的分布.结果表明:1.采用相对走时残差消除了模型区域外的地球模型... 详细信息

本文在论述地震体波成像中速度模型间断面的引入、体波多震相的利用等优越性的同时,利用研究区之外、能改善或分辨地球内部更深处的远震资料,得到研究区平均相对走时残差的分布.结果表明:1.采用相对走时残差消除了模型区域外的地球模型的影响,从而使得在远震理论走时计算中,球状分层各向同性参考地球模型的选取是不重要的;2.平均相对走时残差的分布与研究区内构造分区相关;3.

关键词：地震体波成像地震勘探地球模型地震数据远震

污泥水热联合热解处理对固相产物中重金属的影响

在线全文

学校读者我要写书评

暂无评论

环境工程学报 2018年第7期12卷 2114-2122页

作者：谢胜禹余广炜李杰尤甫天汪刚汪印马建立商晓甫中国科学院城市环境研究所中国科学院城市污染物转化重点实验室厦门361021 中国科学院大学北京100049 天津市环境保护科学研究院天津300191

对酸性重金属污泥(AS)、碱性重金属污泥(BS)及其混合物(MS)进行水热联合热解处理,探讨了固相产物中重金属(Cr、Mn、Ni、Cu和Zn)的BCR形态变化与TCLP浸出毒性特征,并开展潜在生态风险评价。结果表明:AS经水热联合热解处理后得到的固相产... 详细信息

对酸性重金属污泥(AS)、碱性重金属污泥(BS)及其混合物(MS)进行水热联合热解处理,探讨了固相产物中重金属(Cr、Mn、Ni、Cu和Zn)的BCR形态变化与TCLP浸出毒性特征,并开展潜在生态风险评价。结果表明:AS经水热联合热解处理后得到的固相产物(ASC)中重金属的稳定性得到改善,Ni和Zn的残渣态比例显著增加,分别从8.33%和28.08%升至27.04%和51.31%;BS经水热联合热解处理后得到的固相产物(BSC)中重金属的稳定性改善不明显,Cr和Cu的残渣态比例分别从69.25%和65.42%升至82.09%和66.69%,而其他重金属的残渣态比例有所下降。MS经过水热联合热解处理,固相产物(MSC)中重金属的固化效果进一步提高。与理论值相比,Cr、Mn、Ni、Cu和Zn的残渣态比例分别从89.03%、55.85%、47.33%、55.39%和73.19%提高至98.09%、66.72%、48.49%、89.07%和86.70%,其浸出毒性均在USEPA标准以下,潜在风险程度为轻微水平,这为水热联合热解工艺处置重金属污泥提供新的思路。

关键词：污泥水热处理热解重金属形态分析浸出毒性风险评价

The subducted slab of Yangtze Continental block beneath the Tethyan orogen in western Yunnan

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2000年第5期45卷 466-472,481页

作者： futian Liu Jianhua Liu Dalai Zhong Jiankun He Qingyu you Chinese Acad Sci Inst Geol & Geophys Beijing 100101 Peoples R China

The western Yunnan area is a natural laboratory with fully developed and best preserved Tethyan orogen in the world. Seismic tomography reveals a slab-like high velocity anomaly down to 250 km beneath the western Yunnan Tethyan orogen, to its west there is a low-velocity column about 300 km wide. in the region from Lancangjiang to Mojiang an obvious low velocity in the lower crust and uppermost mantle overlies on the slab. Synthesizing the available geological and geochemical results, the present paper demonstrates that this slab-like high velocity anomaly is a part of the subducted plate of Yangtze Continental segment after the closure of Paleotethys. The collision of India and Eurasia continent starting from 50-60 MaBP might trigger thermal disturbance in the upper mantle and cause the uprising of asthenosphere, in that case the subducted Yangtze plate could be broken off, causing Cenozoic magmatic activities and underplating in the Lancangjiang-Mojiang region.

关键词： seismic tomography Tethyan orogen in western Yunnan subduction remains of Yangtze Block.

Necessary and sufficient checkpoint selection for temporal verification of high-confidence cloud workflow systems

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2015年第5期58卷 33-48页

作者： WANG futian LIU Xiao YANG Yun School of Computer Science and Technology Anhui University Shanghai Key Laboratory of Trustworthy Computing East China Normal University School of Software and Electrical Engineering Swinburne University of Technology

On-time completion is an important temporal Qo S(Quality of Service) dimension and one of the fundamental requirements for high-confidence workflow systems. In recent years, a workflow temporal verification framework, which generally consists of temporal constraint setting, temporal checkpoint selection, temporal verification, and temporal violation handling, has been the major approach for the high temporal Qo S assurance of workflow systems. Among them, effective temporal checkpoint selection, which aims to timely detect intermediate temporal violations along workflow execution plays a critical role. Therefore, temporal checkpoint selection has been a major topic and has attracted significant efforts. In this paper, we will present an overview of workflow temporal checkpoint selection for temporal verification. Specifically, we will first introduce the throughput based and response-time based temporal consistency models for business and scientific cloud workflow systems,respectively. Then the corresponding benchmarking checkpoint selection strategies that satisfy the property of"necessity and sufficiency" are presented. We also provide experimental results to demonstrate the effectiveness of our checkpoint selection strategies, and finally points out some possible future issues in this research area.

关键词： workflow system workflow temporal verification temporal checkpoint selection business workflow scientific workflow quality of se

Integrated benefits of power generation by straw biomass--A case study on the Sheyang Straw Power Plants in Jiangsu Province,China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2009年第3期3卷 348-353页

作者： Xiaoshun LI futian QU Dongmei JIANG Peixin ZHU China Centre for Land Policy Research Nanjing Agriculture UniversityNanjing 210095China

Power generation using straw biomass has quantifiable benefits from an economic,ecological,and sociological perspective in *** methods used to construct the assessment models of these integrated benefits were the revenue capitalization approach and the discounted-cash-flow *** results indicated that a straw power plant with the capacity of 2.50×10^(7)W and burning 1.23×10^(5)tons of cotton straw could annually supply 1.40×10^(8)kWh of ***,it would not be until six years later that these results could be *** the long term,the gross benefits could reach up to 4.63×10^(8)***,the total benefits are expected to be 1.18×10^(12)Yuan if all available straw resources are used to generate *** policy implication showed that the long-term integrated benefits of power generation by straw biomass outweighed the short-term *** is the main incentive to use straw biomass for power generation in the future.

关键词： straw biomass resources power generation renewable energy Sheyang county

小净距多线隧道掘进方案对围岩稳定性的影响研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

河南理工大学学报（自然科学版） 2025年第1期44卷 176-184页

作者：刘莉张正刘军欧臣赵英博赵伏田河海大学土木与交通学院江苏南京210098 中铁二十四局集团有限公司上海200040

目的小净距多线隧道在轨道交通工程中应用广泛,但由于施工步骤繁多且掘进过程中影响因素较多,需设计合理的小净距多线隧道并行掘进方案。方法采用2种不同开挖顺序的并行掘进方案,通过建立三维有限元数值仿真模型,比较2种方案的隧道围岩... 详细信息

目的小净距多线隧道在轨道交通工程中应用广泛,但由于施工步骤繁多且掘进过程中影响因素较多,需设计合理的小净距多线隧道并行掘进方案。方法采用2种不同开挖顺序的并行掘进方案,通过建立三维有限元数值仿真模型,比较2种方案的隧道围岩应力与位移发展规律,分析现场监测数据,对比模型的准确性,确定掘进方案的可行性。结果结果表明,开挖顺序对围岩间相互作用影响明显,中隧应力和变形受影响最大。中隧先挖法可以较好地避免应力较为集中现象,2种开挖方式的变形值均在安全范围内;依次开挖法和中隧先挖法拱腰处水平应力的变化规律基本一致,依次开挖法的拱顶处垂直应力比中隧先挖法的大40%左右;中隧先挖法的拱腰水平变形和拱顶沉降值分别比依次开挖法的增大23%,26%,但中隧先挖法开挖初期的沉降值较少;中隧先挖进度较快,应力和沉降控制能力优于依次开挖法,数值模拟方法能较好反映真实施工情况,现场监测结果也表明中隧先挖法适用于小净距隧道进口段施工。结论综合考虑衬砌结构应力、变形和施工工期,现场可采用中隧先挖法进行施工。研究结果可为类似小净距多线并行隧道工程设计与施工提供理论参考。

关键词：小净距多线隧道平行掘进依次开挖法中隧先挖法现场监测

FaSnRK1a mediates salicylic acid pathways to enhance strawberry resistance to Botrytis cinerea

在线全文

学校读者我要写书评

暂无评论

Horticultural Plant Journal 2024年第1期10卷 131-144页

作者： Jingjing Luo Wenying Yu Yuansong Xiao Yafei Zhang futian Peng State Key Laboratory of Crop Biology College of Horticulture Science and EngineeringShandong Agricultural UniversityTaianShandong 271018China

Strawberry is a major fruit crop worldwide because its nutritional and health benefits to human health,but its productivity is limited by Botrytis *** nonfermentation 1-related protein kinase 1(SnRK1)has a defense function against pathogens,but the function of SnRK1 in the defense response to *** in plants is still *** this study,FaSnRK1a-OE and RNAi fruits were constructed and then inoculated with *** result reveals a positive role of Fa SnRK1a in the regulation of resistance to gray ***1a affects SA content by regulating FaPAL1 and FaPAL2 *** genes related to the SA signaling pathway(FaTGA1 and FaTGA2.1)were significantly increased/decreased in FaSnRK1a-OE or FaSnRK1a-RNAi fruit,***1a interacted with the FaWRKY33.2 protein and negatively regulated FaWRKY33.2 expression,and FaWRKY33.2 acts as a repressor of disease resistance to ***,FaSnRK1a regulates the expression of six PR genes and the activities of antioxidant enzymes to boost defense response after *** *** findings showed that FaSnRK1a increases the resistance of strawberry fruit to *** via SA signaling pathway and interaction with the FaWRKY33.2 transcription factor.

关键词： Strawberry B.cinerea SnRK1 Salicylic acid WRKY transcription factor

The Impact of Changes of Property Rights on Farmland Use:An Empirical Study of China during Transition

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Population,Resources and Environment 2007年第1期5卷 26-32页

作者： Chen Zhigang Qu futian Wang Qing Department of Land Resources and Tourism Studies Nanjing University Nanjing Jiangsu 210093 China China Center for Land Policy Research Nanjing Agricultural University Nanjing Jiangsu 210095 China

In China, farmland property rights characterized by the household-responsibility system (HRS) have been improved since the reform and opening-up. The rights of use, transfer and gain become more stable, authorized and complete. This paper firstly analyzes the impact on farmland productivity, which comes from the improvement of farmland property rights. Then, an economet- ric model is built to test the above analysis. It concludes that changes of property rights will affect farmland performance in China. In the end, some policy implications are explored for fur- ther reforms.

关键词： property rights institutional changes farmland use China