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Transfer and migration of polycyclic aromatic hydrocarbons in soil irrigated with long-term wastewater

International Journal of Agricultural and Biological Engineering 2016年第5期9卷 83-92页

作者： Cui Song Fu Qiang Li Tianxiao Liu Dong Li Yifan Wang Min International Joint Research Center for Persistent Toxic Substances(IJRC-PTS) School of Water Conservancy and Civil EngineeringNortheast Agricultural UniversityHarbin 150030China Key Laboratory of High Efficiency Utilization of Agricultural Water Resource of Ministry of Agriculture Northeast Agricultural UniversityHarbin 150030China International Joint Research Center for Persistent Toxic Substances(IJRC-PTS) Harbin Institute of TechnologyHarbin 150090China

In order to investigate the transfer and migration behavior of polycyclic aromatic hydrocarbons(PAHs)in soil with long-term wastewater irrigation,Groundwater Ubiquity Score(GUS)and fugacity method were respectively used to assess the potential entry into the groundwater and transfer capacity of *** results of assessment using GUS show that there is significant correlation between the GUS and organic carbon sorption coefficient(KOC)for PAHs and a simple assessment method with KOC was referred to evaluate contamination of *** fugacity method,evaluation results of transfer and migration of PAHs in soil suggest that the PAHs accumulation in the soil through long-term wastewater irrigation could be re-volatilized as secondary emission sources to atmosphere for the Low Molecular Weight(LMW)PAHs,in contrast to High Molecular Weight(HMW)PAHs for which the soil remains a sink that could absorb more *** net volatilisation flux was 0.39 g/d in upland and 0.32 g/d in paddy for LMW Nap(Naphthalene),and 0.97×10^(-3)g/d in upland and 0.37×10^(-3)g/d in paddy for LMW Phe(Phenanthrene).The net deposition was 0.72×10^(-4)g/d in upland and 0.10×10^(-3)g/d in paddy for HMW Fla(Fluoranthene),and 0.22×10^(-4)g/d in upland and 0.20×10^(-4)g/d in paddy for HMW Bap(Benzo[a]pyrene).Sensitivities of the model estimates to input parameters were tested,and the sensitivity coefficient was defined for the *** most influential parameters were the volumes of the air,water,and organic carbon fractions in soil and the thickness of the soil.

关键词： wastewater irrigation polycyclic aromatic hydrocarbons transfer and migration groundwater contamination groundwater ubiquity score

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Relationship Between Agricultural Credits and Agricultural Economy Based on Error Correct Model in heilongjiang Province

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Journal of Northeast Agricultural University(English Edition) 2011年第1期18卷 75-78页

作者： XIN Liqiu LI Yanqiu College of Economics and Management Northeast Agricultural University Harbin 150030 China

heilongjiang is a large agriculture *** of agriculture,rural areas and farmers are urgent to be *** development of agriculture needs the support of agricultural credits,because finance is the center of agriculture ***,the low comparative advantage in agriculture and pursuit of the capital interests which aggravate the conflicts of supply and demand of agricultural *** of fund is the main factor that constrains the development of agricultural *** order to analyze the economic effect of agricultural credits on agricultural economy,an error correction model was set up to research the relationship between them,which based on the least square *** the study of the contribution from agricultural credits to total value of agricultural out-put,the empirical evidence for developing the rural financial vigorously was provided,in order to promote the agricultura leconomic development.

关键词： agricultural credit agricultural economy stationary co-integration error correction model

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Issues of Expansion of China Rural Resident Consumption

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Journal of Northeast Agricultural University(English Edition) 2013年第2期20卷 82-88页

作者： Liu Chang Wang Bo Jiao Fang-yi College of Humanities and Law Northeast Agricultural University College of Economics and Management Heilongjiang University

The international financial crisis on our economic development resulted in the inevitable impact on Chinese economy. In order to get rid of the impact, the expansion of domestic demand has been a crucial means of steady economic growth in China. However, the farmers over seven million account for a large proportion should be the main consumers in China. On the contrary, the current lack of domestic demand in China, which is mainly in rural consumption, is the lack of the critical issues of our efforts to expand domestic demand. This paper clarified the factors restricting China rural residents＇ consumption demand expansion, and on this basis explored the expansion of rural residents＇ consumption demand countermeasures. Empirical analysis was used to prove the low level of income of rural residents＇ constraints, and also to expose the fact that social security system was imperfect. Meanwhile, rural infrastructure restricted the consumption level of rural residents. The consumer market is an effective way to improve rural residents＇ consumption demand.

关键词： rural resident consumption demand income

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The research on the Questions and Countermeasures of the Development of Chinese Agricultural Product Logistics

The research on the Questions and Countermeasures of the Dev...

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作者： Zhao Yingxia Northeast Agricultural University Harbin University of Commerce

The level of the agricultural product logistics development has become one of the key aspects which decide the level of the whole development of one country agricultural economy. There are such problems as high cost, low efficiency, low socialization and marketability degree, old logistics facility and technology, lacking talented persons, impeded information and so on. Aiming at these questions, this article has proposed the countermeasures including exploring new agricultural production circulation pattern, cultivating and developing agricultural product logistics organizations, strengthening education and training, enlarging the government support, speeding up the informationization construction and standardization construction of the agricultural product logistics.

关键词： Agricultural product logistics Agricultural product logistics organization Agricultural product logistics standardization

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The research on the Questions and Countermeasures of the Development of Chinese Agricultural Product Logistics

The research on the Questions and Countermeasures of the Dev...

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东北亚学术论坛2007

作者： Zhao Yingxia Harbin University of Commerce Northeast Agricultural University

关键词： Agricultural product logistics Agricultural product logistics organization Agricultural product logistics standardization

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A Research on the Development Strategies for Renewable Energy Consumption

A Research on the Development Strategies for Renewable Energ...

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2012 IEEE 3rd International Conference on Emergency Management and ManagementSciences(ICEMMS 2012)

作者： Si Wang School of Economics and Management Harbin Engineering University Harbin China Guoyuan Han School of Economics and Management Harbin Engineering University Harbin China Wentong Zhou School of Economics and Management Harbin Engineering University Harbin China

Energy is an essential material basis for human society and also a basis element of the national economy. The efficiency of energy use and reasonable energy consumption is in relation to the socio-economic sustainable development. On account of global limited fossil energy reserves, all countries attach importance to the development of renewable energy. The paper uses heilongjiang Province as a case to study the relationship between renewable energy consumption and economic growth of heilongjiang Province. The results show that there is not a long- term cointegration relationship between economic growth and renewable energy consumption in heilongjiang province. Economic growth is a direct result of the increase in renewable energy consumption, but the increase in renewable energy consumption can not lead to economic growth. From the gray comprehensive correlation degree view, economic growth and renewable energy consumption associated with a higher degree, so the role of renewable energy should not be ignored. Finally, based on Empirical findings, the development strategies of renewable energy are given.

关键词： energy consumption economic growth unit root test cointegration test Granger Causality Test

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Computer English Teaching Based on WeChat

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国际计算机前沿大会会议论文集 2016年第2期 6-7页

作者： Fei Lang Kexin Zhang Peipei Li Guanglu Sun School of Foreign Languages Harbin University of Science and TechnologyHarbinHeilongjiangChina School of Computer Science and Technology Harbin University of Science and TechnologyHarbinHeilongjiangChina

Computer English plays a vital role in academic study for students majored in Computer *** the fast development of information technology,traditional English teaching methods cannot meet students’learning *** is the most popular mobile application of social networks in *** features of real-time communication,interactivity and utilization of fragmentary time attract educators’attention to its application in *** paper carried out an empirical study to explore applying WeChat in Computer English *** WeChat,an English interaction environment was built,and interactive learning activities were *** experimental results show teaching based on WeChat is effective to improve students’Computer English skills.

关键词： Computer English WeChat social networks English teaching

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Traffic Collection and Analysis System

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国际计算机前沿大会会议论文集 2016年第2期 67-69页

作者： Jinlai Liu Haitao Wen Xiangyu Hou Guanglu Sun Suxia Zhu School of Computer Science and Technology Research Center of Information Security and Intelligent TechnologyHarbin University of Science and TechnologyHarbinChina

This paper designs and implements a network traffic collection and analysis system(NTCA).Network traffic is collected from multiple *** to the offline traffic analysis,network flows are analyzed and annotated with application *** the same time,the results are stored in the *** also provides a visual interface to simplify the configuration *** good flexibility and scalability,NTCA can be extended to a network traffic clas sification system,which is crucial to the research of network security technology.

关键词： Traffic classification Traffic collection and analysis Feature extraction Traffic annotation

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Computer English Acquisition Environment Construction Based on Question Answering Technology Based on Question Answering Technology

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国际计算机前沿大会会议论文集 2016年第2期 3-5页

作者： Fei Lang Peipei Li Jian Kang Guanglu Sun School of Foreign Languages Harbin University of Science and TechnologyHarbinHeilongjiangChina Beijing Institute of Astronautical Systems Engineering BeijingChina School of Computer Science and Technology Harbin University of Science and TechnologyHarbinHeilongjiangChina

In-depth vocabulary knowledge plays a key role in L2(second language)vocabulary acquisition,and computer English vocabulary is vital to academic performances of students majored in Computer *** many Chinese students cannot realize computer English vocabulary acquisition due to lacking input environment of computer *** solve this problem,with techniques of keyword search,information retrieval,and text classification,to meet the diverse learning needs of students,it built the in-depth computer English vocabulary knowledge acquisition environment for the high frequency of computer English words,providing the depth of knowledge such as polysemy,synonyms,syntax,and *** construction of in-depth computer English vocabulary acquisition environment helps future studies on computer English teaching applications.

关键词： Computer English In-depth vocabulary knowledge Information retrieval Text classification

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