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IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： Jinhua Zhang Baohui Zhang Bingqing Wu Jin Wang Shaanxi Key Laboratory of Smart Grid Xi'an Jiaotong University Xi'an China Electric Power Dispatching and Control Center State Grid Shandong Electric Power Company Jinan China

ISBN: (纸本)9781509054190

To investigate the fault features of doubly-fed induction generator (DFIG) with rotor side converter (RSC) control, an analytic method of calculating the DFIG short-circuit current is proposed in this paper. Based on the space vector model of DFIG with RSC control, the dynamic equation of rotor current reflecting both the machine transient process and the impact of RSC control is derived, and analytic expressions of rotor and stator fault current in time-domain are obtained. The calculation result is certified by being compared with the PSCAD simulation result. According to the derived analytic expressions, the components of the DFIG short-circuit current are analyzed. It indicates that the machine terminal voltage dip of DFIG, the current reference value, the orientation angle, and the proportional-integral value of RSC controller are main factors influencing the short-circuit current characteristics.

关键词： Damping Indexes Power grids Frequency control Time-frequency analysis Stators

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Development of database of real-world diesel vehicle emission factors for China

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Journal of Environmental Sciences 2015年第5期27卷 209-220页

作者： Xianbao Shen Zhiliang Yao Qiang Zhang David Vance Wagner Hong Huo Yingzhi Zhang Bo Zheng Kebin He State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University School of Food and Chemical Engineering Beijing Technology and Business University Ministry of Education Key Laboratory for Earth System Modeling Center for Earth System Science Tsinghua University International Council on Clean Transportation (ICCT) Institute of Energy Environment and Economy Tsinghua University State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University

A database of real-world diesel vehicle emission factors, based on type and technology, has been developed following tests on more than 300 diesel vehicles in China using a portable emission measurement system. The database provides better understanding of diesel vehicle emissions under actual driving conditions. We found that although new regulations have reduced real-world emission levels of diesel trucks and buses significantly for most pollutants in China, NOx emissions have been inadequately controlled by the current standards, especially for diesel buses, because of bad driving conditions in the real world. We also compared the emission factors in the database with those calculated by emission factor models and used in inventory studies. The emission factors derived from COPERT（Computer Programmer to calculate Emissions from Road Transport） and MOBILE may both underestimate real emission factors, whereas the updated COPERT and PART5（Highway Vehicle Particulate Emission Modeling Software） models may overestimate emission factors in China. Real-world measurement results and emission factors used in recent emission inventory studies are inconsistent,which has led to inaccurate estimates of emissions from diesel trucks and buses over recent years. This suggests that emission factors derived from European or US-based models will not truly represent real-world emissions in China. Therefore, it is useful and necessary to conduct systematic real-world measurements of vehicle emissions in China in order to obtain the optimum inputs for emission inventory models.

关键词： Diesel vehicle Emission factor Portable emission measurement system Database China

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Study on non-point sources pollution loading of nitrogen and phosphorus in Ashi river basin

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IOP Conference Series: Earth and Environmental Science 2017年第1期69卷

作者： G W Ma Y Y Wang L H He H J Liang B D Su Y Hu G Wang China National Environmental Monitoring Center State Environment Protection Key Laboratory of Environmental Monitoring Quality Control Beijing 100012 China Xining Environmental Monitoring Station Xining 810008 China Chinese Research Academy of Environmental Sciences State Key Laboratory of Environmental Criteria and Risk Assessment Beijing 100012 China

The formation process of the non-point source pollution (NSP) was understood, through research and survey of Ashi River Basin of China. Different sources of NSP loads were obtained, by different sources of NSP monitoring techniques and estimation methods. The amount of NSP into the river was obtained, by monitoring techniques and estimation methods of NSP into the river in the Basin. The monitoring technology and loading estimation method system of NSP in the Ashi River Basin was established. It were calculated that different sources of NSP loading of total nitrogen (TN) was 8975.42t and total phosphorus (TP) was 606.27 t in 2010. NSP coefficient into the river the amount of TN was 4140.75 t and TP was 343.98 t, therefore, TN was 0.46, TP was 0.57 of the NSP into the river coefficient in the Ashi River Basin in 2010.

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Evaluation index system of odour pollution for kitchen waste treatment facilities in China

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Chemical Engineering Transactions 2016年 54卷 139-144页

作者： Zhang, Yan Zhai, Zengxiu Li, Weifang Wang, Yuangang Wang, Gen Tianjin Sinodour Environmental Technology Co. Ltd Tianjin300191 China State Environmental Protection Key Laboratory of Odor Pollution Control Tianjin300191 China Tianjin Academy of Environmental Sciences Tianjin300191 China

This paper was based on the survey of odour emission characteristics of Chinese kitchen waste treatment facilities and olfactory thresholds of 40 odorants which were measured by state Environmental protection key laboratory of Odor Pollution control. An evaluation index system of odour pollution which is composed of theoretical odour concentration, odorant indicators and theoretical odour intensity was established for kitchen waste treatment facilities. Xining kitchen waste treatment facilities were chosen as the typical object for applying to this system. Finally, methyl mercaptan, ethyl sulfide, sulfuretted hydrogen, ethyl alcohol, a'pinene, limonene, and dimethyl disulfide were considered as the primary indicators in this enterprise. In addition, the value of theoretical odour concentration and theoretical odour intensity are 59832.13 and 5. This system set up theoretical foundation for the prediction, simulation and control of odour pollution and provide technical support for mastering the public impact degree of odour pollution. © 2016, AIDIC Servizi S.r.l.

关键词： Sulfur compounds

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Native diversity buffers against severity of non-native tree invasions ( vol 621,pg 773 , 2023 )

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NATURE 2023年第7982期622卷 E2-E2页

作者： Delavaux, Camille S. Crowther, Thomas W. Zohner, Constantin M. Robmann, Niamh M. Lauber, Thomas van den Hoogen, Johan Kuebbing, Sara Liang, Jingjing de-Miguel, Sergio Nabuurs, Gert-Jan Reich, Peter B. Abegg, Meinrad Yao, Yves C. Adou Alberti, Giorgio Zambrano, Angelica M. Almeyda Alvarado, Braulio Vilchez Alvarez-Davila, Esteban Alvarez-Loayza, Patricia Alves, Luciana F. Ammer, Christian Anton-Fernandez, Clara Araujo-Murakami, Alejandro Arroyo, Luzmila Avitabile, Valerio Aymard, Gerardo A. Baker, Timothy R. Balazy, Radomir Banki, Olaf Barroso, Jorcely G. Bastian, Meredith L. Bastin, Jean-Francois Birigazzi, Luca Birnbaum, Philippe Bitariho, Robert Boeckx, Pascal Bongers, Frans Bouriaud, Olivier Brancalion, Pedro H. S. Brandl, Susanne Brienen, Roel Broadbent, Eben N. Bruelheide, Helge Bussotti, Filippo Gatti, Roberto Cazzolla Cesar, Ricardo G. Cesljar, Goran Chazdon, Robin Chen, Han Y. H. Chisholm, Chelsea Cho, Hyunkook Cienciala, Emil Clark, Connie Clark, David Colletta, Gabriel D. Coomes, David A. Valverde, Fernando Cornejo Corral-Rivas, Jose J. Crim, Philip M. Cumming, Jonathan R. Dayanandan, Selvadurai de Gasper, Andre L. Decuyper, Mathieu Derroire, Geraldine DeVries, Ben Djordjevic, Ilija Dolezal, Jiri Dourdain, Aurelie Obiang, Nestor Laurier Engone Enquist, Brian J. Eyre, Teresa J. Fandohan, Adande Belarmain Fayle, Tom M. Feldpausch, Ted R. Ferreira, Leandro V. Fischer, Markus Fletcher, Christine Frizzera, Lorenzo Gamarra, Javier G. P. Gianelle, Damiano Glick, Henry B. Harris, David J. Hector, Andrew Hemp, Andreas Hengeveld, Geerten Herault, Bruno Herbohn, John L. Herold, Martin Hillers, Annika Coronado, Euridice N. Honorio Hui, Cang Ibanez, Thomas T. Amaral, Ieda Imai, Nobuo Jagodzinski, Andrzej M. Jaroszewicz, Bogdan Johannsen, Vivian Kvist Joly, Carlos A. Jucker, Tommaso Jung, Ilbin Karminov, Viktor Kartawinata, Kuswata Kearsley, Elizabeth Kenfack, David Kennard, Deborah K. Kepfer-Rojas, Sebastian Keppel, Gunnar Khan, Mohammed Latif Killeen, Timothy J. Kim, Hyun Seok Kitayama, Kanehiro Kohl, Michael Korju Institute of Integrative Biology ETH Zurich (Swiss Federal Institute of Technology) Zurich Switzerland Department of Genetics Evolution and Environment University College London London UK The Forest School at The Yale School of the Environment Yale University New Haven CT USA Department of Forestry and Natural Resources Purdue University West Lafayette IN USA Department of Agriculture Forestry and Bioresources Seoul National University Seoul South Korea Department of Crop and Forest Sciences University of Lleida Lleida Spain Joint Research Unit CTFC–AGROTECNIO–CERCA Solsona Spain Wageningen University and Research Wageningen The Netherlands World Agroforestry (ICRAF) Nairobi Kenya Department of Forest Resources University of Minnesota St Paul MN USA Hawkesbury Institute for the Environment Western Sydney University Penrith New South Wales Australia Institute for Global Change Biology and School for Environment and Sustainability University of Michigan Ann Arbor MI USA Swiss Federal Institute for Forest Snow and Landscape Research WSL Birmensdorf Switzerland UFR Biosciences University Félix Houphouët-Boigny Abidjan Côte d’Ivoire Department of Agricultural Food Environmental and Animal Sciences University of Udine Udine Italy Faculty of Science and Technology Free University of Bolzano Bolzano Italy Spatial Ecology and Conservation Laboratory Department of Tourism Recreation and Sport Management University of Florida Gainesville FL USA Forestry School Tecnológico de Costa Rica TEC Cartago Costa Rica Fundacion ConVida Universidad Nacional Abierta y a Distancia UNAD Medellin Colombia Field Museum of Natural Histiory Chicago IL USA Center for Tropical Research Institute of the Environment and Sustainability UCLA Los Angeles CA USA Silviculture and Forest Ecology of the Temperate Zones University of Göttingen Göttingen Germany Division of Forest and Forest Resources Norwegian Institute of Bioeconomy Research (NIBIO) Ås Norway Museo de Hi

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Correction to: Genome-enabled insights into the biology of thrips as crop pests

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BMC biology 2020年第1期18卷 169页

作者： Dorith Rotenberg Aaron A Baumann Sulley Ben-Mahmoud Olivier Christiaens Wannes Dermauw Panagiotis Ioannidis Chris G C Jacobs Iris M Vargas Jentzsch Jonathan E Oliver Monica F Poelchau Swapna Priya Rajarapu Derek J Schneweis Simon Snoeck Clauvis N T Taning Dong Wei Shirani M K Widana Gamage Daniel S T Hughes Shwetha C Murali Samuel T Bailey Nicolas E Bejerman Christopher J Holmes Emily C Jennings Andrew J Rosendale Andrew Rosselot Kaylee Hervey Brandi A Schneweis Sammy Cheng Christopher Childers Felipe A Simão Ralf G Dietzgen Hsu Chao Huyen Dinh Harsha Vardhan Doddapaneni Shannon Dugan Yi Han Sandra L Lee Donna M Muzny Jiaxin Qu Kim C Worley Joshua B Benoit Markus Friedrich Jeffery W Jones Kristen A Panfilio Yoonseong Park Hugh M Robertson Guy Smagghe Diane E Ullman Maurijn van der Zee Thomas Van Leeuwen Jan A Veenstra Robert M Waterhouse Matthew T Weirauch John H Werren Anna E Whitfield Evgeny M Zdobnov Richard A Gibbs Stephen Richards Department of Entomology and Plant Pathology North Carolina State University Raleigh NC 27695 USA. drotenb@ncsu.edu. Virology Section College of Veterinary Medicine University of Tennessee A239 VTH 2407 River Drive Knoxville TN 37996 USA. Department of Entomology and Nematology University of California Davis Davis CA 95616 USA. Laboratory of Agrozoology Department of Plants and Crops Ghent University Coupure Links 653 9000 Ghent Belgium. Institute of Molecular Biology and Biotechnology Foundation for Research and Technology-Hellas Vassilika Vouton 70013 Heraklion Greece. Department of Genetic Medicine and Development University of Geneva Medical School and Swiss Institute of Bioinformatics Geneva Switzerland. Institute of Biology Leiden University 2333 BE Leiden The Netherlands. Institute for Zoology: Developmental Biology University of Cologne 50674 Cologne Germany. Department of Plant Pathology University of Georgia - Tifton Campus Tifton GA 31793-5737 USA. National Agricultural Library USDA-ARS Beltsville MD 20705 USA. Department of Entomology and Plant Pathology North Carolina State University Raleigh NC 27695 USA. Department of Plant Pathology Kansas State University Manhattan KS 66506 USA. Department of Biology University of Washington Seattle WA 98105 USA. Chongqing Key Laboratory of Entomology and Pest Control Engineering College of Plant Protection Southwest University Chongqing China. International Joint Laboratory of China-Belgium on Sustainable Crop Pest Control Academy of Agricultural Sciences Southwest University Chongqing China and Ghent University Ghent Belgium. Department of Botany University of Ruhuna Matara Sri Lanka. Human Genome Sequencing Center Department of Human and Molecular Genetics Baylor College of Medicine One Baylor Plaza Houston TX 77030 USA. Department of Biological Sciences University of Cincinnati Cincinnati OH 45221 USA. IPAVE-CIAP-INTA 5020 Cordoba Argentina. Department of Biology Mo

An amendment to this paper has been published and can be accessed via the original article.

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Development of a compact mobile fuel laboratory in China

Development of a compact mobile fuel laboratory in China

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Chinese control Conference (CCC)

作者： Mi Zhang Jingnan Hu Xiaofeng Bao Rencheng Zhu Shuxia Xie Lei Zu Chuanyong Sun Jiuzhi Lv State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental Sciences Beijing CN Weihai Yihe Special Purpose Vehical Co. LTD China

This study discusses development of a mobile fuel laboratory in China, which integrates sulfur content detection device, vapor pressure testing device and fast simulation equipment for detergency detection. The compact mobile fuel lab can test detergency and sulfur content of both gasoline and diesel, and volatilization characteristic of gasoline. The research shows that taking many efficient measures to control influence factors can ensure portable devices providing reliable testing results. The main influence factors such as vehicle vibration, essential resource supply, operating conditions and data quality control have been studied in this work. Building a three dimension dynamic model, consisted of vehicle, absorber and devices, can confirm the influence of vibration. Furthermore, the solution of the model is used for guiding the design and selection of vibration damping unit. Three power supply approaches, including commercial, generator and uninterruptible power supply, can provide sufficient electricity. And split-phase circuit, voltage regulator and filter device are set up for decrease electrical signal interference. Temperature and air circulation are two important elements which should be strictly controlled; thus, automotive air-conditioning system and an additionally onboard roof type air condition work alternatively to keep ambient temperature stable, and gas concentration alarm unit interlocked together with ventilation system ensures the car in a safe gas concentration range. Experiments prove that optimized equipment has good repeatability of results. Additionally, pre-treatment and pre-assessment are effective processes for blind sample analysis.

关键词： Testing Vehicles Mobile communication Sulfur Vibrations Petroleum

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Production simulation of power systems considering the forecast error of renewable energy

Production simulation of power systems considering the forec...

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IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： Kun Ding Ningbo Wang Haipeng Xie Zhaohong Bie Laboratory of Wind Power Integration Operation and Control Gansu Electric Power Corporation Wind Power Technology Center Lanzhou China State Key Laboratory of Electrical Insulation and Power Equipment & Smart Grid Xi'an Jiaotong University Xi'an China

ISBN: (纸本)9781509054190

A short-term stochastic production simulation method considering the forecast error of renewable sources power is proposed to focus on the issue that conventional production simulation method is incapable of depicting the forecast error of renewable sources power. The proposed method contains two hierarchies, i.e. the day-ahead simulation and the real-time simulation. As for day-ahead simulation, a day-ahead scheduling of conventional units and renewable energy plants is determined by solving a unit commitment model on the basis of forecasted renewable sources power and load profiles. Real-time simulation is the supplement to day-ahead simulation and it corrects the results in day-ahead simulation. The validity of the proposed method is proved with a real power grid in Northwest China. Case studies show that conventional units may be still the major resource of power grids although these installed capacity is no larger than renewable energy resources. Meanwhile, forecast errors actually impact reliability of power systems.

关键词： Load modeling Renewable energy sources Production Autoregressive processes Predictive models Power grids

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Terrestrial input and nutrient change reflected by sediment records of the Changjiang River Estuary in recent 80 years

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Acta Oceanologica Sinica 2015年第2期34卷 27-35页

作者： LI Junlong ZHENG Binghui HU Xupeng WANG Yiming DING Ye LIU Fang College of Water Sciences Beijing Normal University State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring China National Environmental Monitoring Center Zhoushan Marine Ecological Environmental Monitoring Station

A variety of environmental problems have been observed in the Changjiang River Estuary and adjacent coastal area, including eutrophication, harmful algal blooms（HABs）, and hypoxia in recent decades. Application of sedimentary biogenic element indicators on the study of paleoenvironment can reconstruct environmental evolution history of waters. Two 210Pb-dated cores were collected from the Changjiang River Estuary（S3） and adjacent coastal area（Z13）, and total organic carbon（TOC）, total nitrogen（TN）, biogenic silicon（BSi）, total phosphorus（TP） and phosphorus（P） species were analyzed. Three stages of environmental changes are deduced by the nutrient sedimentary records. First, nutrient concentration increased rapidly since the 1950 s, which attributed to agriculture development and overused chemical fertilizers. Second, nutrient concentration kept high and primary production began to promote during the 1960 s to 1980 s, while diatom abundance and proportion began to decline since the 1970 s, accompanied by reduced 23 Si O- concentration and flux from the river. Third, due to several dams and bridges constructed, river runoff and coastal hydrodynamic conditions reduced to a certain extent since the 1990 s, which aggravated the unbalance in nutrient structure. Multi-nutrient proxies in sediment can reflect the natural environm-ental changes as well as influence of human activities.

关键词： biogenic elements phosphorus species sediment cores Changjiang River Estuary

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Fruit Waste to Energy through Open Fermentation

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Energy Procedia 2017年 142卷 904-909页

作者： Abdul Sattar Qureshi Imrana Khushk Salman Raza Naqvi Altaf Ahmed Simiar Chaudhry Haider Ali Muhammad Naqvi Muhammad Danish Ayyaz Ahmed Hamid Majeed Abdul Nabi Mir Jatt Mohammad Rehan Abdul-Sattar Nizami Institute of Biotechnology and Genetic Engineering University of Sindh Jamshoro (76080) Pakistan School of Chemical & Materials Engineering National University of Sciences & Technology Islamabad (44000) Pakistan College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 China Department of Chemical Engineering University of Engineering & Technology KSK Campus Lahore 54890 Pakistan Department of Energy Building and Environment Mälardalen University Västerås 72123 Sweden State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process ECUST Shanghai 200237 China Department of Chemical Engineering Muhammad Nawaz Sharif University of Engineering and Technology Multan Pakistan Key Laboratory of Food Colloids and Biotechnology Jiangnan University Wuxi China Institute of Microbiology University of Sindh Jamshoro (76080) Pakistan Center of Excellence in Environmental Studies (CEES) King Abdulaziz University Jeddah Saudi Arabia

This study aims to examine the nonsterilized fermentation conditions for coproduction of pectinases and lipase enzymes using several fruit wastes as an energy source. Thermophilic fungal strain, Penicillium expansum CMI 39671 was used as a fermenting strain. The effect of process conditions including; nitrogen sources, pH, temperature, time and moisture contents, on the production of both enzymes were studied. The highest activities of pectinase and lipase (2817, 1870 U/g dry substrate) enzymes were found with orange peel feedstock, whereas the lowest activities of 1662 U/g and 1266 U/g were found with banana peel and papaya peel feedstocks respectively. Overall, pectinase showed higher enzymatic activities than lipase enzymes, both having similar increasing and decreasing trends, at all studied conditions. The optimum process conditions of peptone as a nitrogen source, pH 7, 40°C, 5 days and 70% moisture contents, were found to show highest enzymatic activities for both enzymes. The orange peel feedstock showed no significant difference in both enzymes’ activities at sterilized and nonnotarized process conditions. Pectinase and lipase enzymes showed (13791 U/g) and (8114 U/g) for sterilized and (14091 U/g) and (8324 U/g) for nonnotarized process conditions respectively. In addition, the fungal strains also produce bacteriocin-like compounds that could inhibit microbial growth. These findings will help to design and develop robust, cost-effective and less energy intensive enzyme production processes and consequently an efficient fruit waste to energy system through open fermentation.

关键词： Open fermentation Penicillium expansum CMI 39671 Fruit waste Orange peel Enzymes

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