Sun, Xu; Yu, Hao; Solvang, Wei Deng. Industry 4.0 and Sustainable Supply Chain Management. Lecture Notes in Electrical Engineering 2021; Volum 737. ISSN 1876-1100.s 595 - 604.s doi: 10.1007/978-981-33-6318-2_74. Sun, Xu; Andol, Eugenia Ama; Yu, Hao. A Simulation-Based Analysis for Effective Distribution of COVID-19 Vaccines: A Case Study in Norway. Transportation Research Interdisciplinary Perspectives (TRIP) 2021; Volum 11.s 1 - 15.s doi: 10.1016/j.trip.2021.100453. Yu, Hao; Sun, Xu; Solvang, Wei Deng; Laporte, Gilbert. Solving a Real-World Urban Postal Service Network Redesign Problem. Scientific Programming 2021; Volum 2021. ISSN 1058-9244.s doi: 10.1155/2021/3058472. Azarian, Mohammad; Yu, Hao; Solvang, Wei Deng. A Simulation-Based Approach for Improving the Performance of a Manufacturing System. IEEE conference proceedings 2021 ISBN 978-1-7281-7658-1.s 543 - 547.s doi: 10.1109/IEEECONF49454.2021.9382722. Azarian, Mohammad; Yu, Hao; Solvang, Wei Deng. Integrating Additive Manufacturing into a Virtual Industry 4.0 Factory. Lecture Notes in Electrical Engineering 2021; Volum 737. ISSN 1876-1100.s 587 - 594.s doi: 10.1007/978-981-33-6318-2_73. Sun, Xu; Yu, Hao; Solvang, Wei Deng. Solving the Location Problem of Printers in a University Campus Using p-Median Location Model and AnyLogic Simulation. (Omtale: https://link.springer.com/chapter/10.1007%2F978-981-15-2341-0_72) Lecture Notes in Electrical Engineering 2020; Volum 634. ISSN 1876-1100.s 577 - 584.s doi: 10.1007/978-981-15-2341-0_72. Yu, Hao; Sun, Xu; Solvang, Wei Deng; Laporte, Gilbert; Lee, Carman K M. A Stochastic Network Design Problem for Hazardous Waste Management. (Fulltekst: https://www.sciencedirect.com/science/article/pii/S0959652620336118?via%3Dihub (Sammendrag: https://www.sciencedirect.com/science/article/pii/S0959652620336118?via%3Dihub) Journal of Cleaner Production 2020; Volum 277. ISSN 0959-6526.s doi: 10.1016/j.jclepro.2020.123566. Zhao, Xu; Lin, Qianjun; Yu, Hao. A Co-Scheduling Problem of Ship Lift and Ship Lock at the Three Gorges Dam. (Fulltekst: https://ieeexplore.ieee.org/document/9142201 (Sammendrag: https://ieeexplore.ieee.org/document/9142201) IEEE Access 2020; Volum 8. ISSN 2169-3536.s 132893 - 132910.s doi: 10.1109/ACCESS.2020.3009775. Yu, Hao; Solvang, Wei Deng. A Fuzzy-Stochastic Multi-Objective Model for Sustainable Planning of a Closed-Loop Supply Chain Considering Mixed Uncertainty and Network Flexibility. (Fulltekst: https://www.sciencedirect.com/science/article/pii/S0959652620317492?via%3Dihub (Sammendrag: https://www.sciencedirect.com/science/article/pii/S0959652620317492?via%3Dihub) Journal of Cleaner Production 2020; Volum 266. ISSN 0959-6526.s doi: 10.1016/j.jclepro.2020.121702. Yu, Hao; Sun, Xu; Solvang, Wei Deng; Zhao, Xu. Reverse Logistics Network Design for Effective Management of Medical Waste in Epidemic Outbreaks: Insights from the Coronavirus Disease 2019 (COVID-19) Outbreak in Wuhan (China). (Fulltekst: https://www.mdpi.com/1660-4601/17/5/1770 (Sammendrag: https://www.mdpi.com/1660-4601/17/5/1770) International Journal of Environmental Research and Public Health (IJERPH) 2020; Volum 17 (5). ISSN 1661-7827.s doi: 10.3390/ijerph17051770. Yu, Hao; Solvang, Wei Deng; Sun, Xu. An Improved Bi-Objective Stochastic Model with SAA-based Solution Method for Reverse Logistics Design of Hazardous Materials. (Fulltekst: https://ieeexplore.ieee.org/document/8978576 (Sammendrag: https://ieeexplore.ieee.org/document/8978576) IEEE International Conference on Industrial Engineering and Engineering Management 2020. ISSN 2157-3611.s 273 - 277.s doi: 10.1109/IEEM44572.2019.8978576. Azarian, Mohammad; Yu, Hao; Solvang, Wei Deng; Shu, Beibei. An Introduction of the Role of Virtual Technologies and Digital Twin in Industry 4.0. (Omtale: https://link.springer.com/chapter/10.1007%2F978-981-15-2341-0_32) Lecture Notes in Electrical Engineering 2020; Volum 634. ISSN 1876-1100.s 258 - 266.s doi: 10.1007/978-981-15-2341-0_32. Noureddine, Rami; Solvang, Wei Deng; Johannessen, Espen; Yu, Hao. Proactive Learning for Intelligent Maintenance in Industry 4.0. (Omtale: https://link.springer.com/chapter/10.1007%2F978-981-15-2341-0_31) Lecture Notes in Electrical Engineering 2020; Volum 634. ISSN 1876-1100.s 250 - 257.s doi: 10.1007/978-981-15-2341-0_31. Yu, Hao; Solvang, Wei Deng; Sun, Xu. A Stochastic Closed-Loop Supply Chain Network Optimization Problem Considering Flexible Network Capacity. Lecture Notes in Electrical Engineering 2020; Volum 634 LNEE. ISSN 1876-1100.s 567 - 576.s doi: 10.1007/978-981-15-2341-0_71. Yu, Hao; Solvang, Wei Deng. A Comparison of Two Location Models in Optimizing the Decision-making on the Relocation Problem of Post Offices at Narvik, Norway. (Fulltekst: https://ieeexplore.ieee.org/document/8607606 IEEE International Conference on Industrial Engineering and Engineering Management 2019; Volum 2019-December. ISSN 2157-3611.s 814 - 818.s doi: 10.1109/IEEM.2018.8607606. Zhao, Xu; Lin, Qianjun; Yu, Hao. An Improved Mathematical Model for Green Lock Scheduling Problem of the Three Gorges Dam. (Fulltekst: https://www.mdpi.com/2071-1050/11/9/2640 (Sammendrag: https://www.mdpi.com/2071-1050/11/9/2640) Sustainability 2019; Volum 11 (9). ISSN 2071-1050.s doi: 10.3390/su11092640. Yu, Hao; Solvang, Wei Deng. Improving the Decision-making of Reverse Logistics Network Design Part I: A MILP Model under Stochastic Environment. (Fulltekst: https://link.springer.com/chapter/10.1007/978-981-10-5768-7_46 Lecture Notes in Electrical Engineering 2018; Volum 451. ISSN 1876-1100.s 431 - 438.s doi: 10.1007/978-981-10-5768-7_46. Yang, Shuo; Yu, Hao; Solvang, Wei Deng. Location-based analysis and optimization of service network performance: A case study. (Fulltekst: https://ieeexplore.ieee.org/document/8355296/ IEEE conference proceedings 2018 ISBN 978-1-5386-4437-9.s doi: 10.1109/SIMS.2018.8355296. Yu, Hao; Solvang, Wei Deng. Incorporating flexible capacity in the planning of a multi-product multi-echelon sustainable reverse logistics network under uncertainty. (Fulltekst: https://www.sciencedirect.com/science/article/pii/S0959652618319863?via%3Dihub Journal of Cleaner Production 2018; Volum 198. ISSN 0959-6526.s 285 - 303.s doi: 10.1016/j.jclepro.2018.07.019. Yu, Hao; Solvang, Wei Deng. A Trade-off Model for Green Supply Chain Design: An Efficiency-versus-Emission Analysis. IEEE conference proceedings 2018 ISBN 978-1-5386-1329-0.s 136 - 142.s doi: 10.1109/ICITM.2018.8333934. Yu, Hao; Roman, Elisabeth; Solvang, Wei Deng. A value chain analysis for bioenergy production from biomass and biodegradable waste: a case study in Northern Norway. (Fulltekst: https://www.intechopen.com/books/energy-systems-and-environment/a-value-chain-analysis-for-bioenergy-production-from-biomass-and-biodegradable-waste-a-case-study-in (Sammendrag: https://www.intechopen.com/books/energy-systems-and-environment/a-value-chain-analysis-for-bioenergy-production-from-biomass-and-biodegradable-waste-a-case-study-in) IntechOpen 2018 ISBN 978-1-78923-711-5.s 183 - 206.s doi: 10.5772/intechopen.72346. Yu, Hao; Solvang, Wei Deng. Improving the Decision-making of Reverse Logistics Network Design Part II: An Improved Scenario-based Solution Method and Numerical Experimentation. (Fulltekst: https://link.springer.com/chapter/10.1007/978-981-10-5768-7_45 Lecture Notes in Electrical Engineering 2018; Volum 451. ISSN 1876-1100.s 421 - 429.s doi: 10.1007/978-981-10-5768-7_45. Yu, Hao; Solvang, Wei Deng. A multi-objective location-allocation optimization for sustainable management of municipal solid waste. Environment Systems and Decisions 2017; Volum 37 (3). ISSN 2194-5403.s 289 - 308.s doi: 10.1007/s10669-017-9632-y. Yu, Hao; Solvang, Wei Deng. A New Two-Stage Stochastic Model for Reverse Logistics Network Design under Government Subsidy and Low-Carbon Emission Requirement. (Fulltekst: http://ieeexplore.ieee.org/document/8289857/ IEEE International Conference on Industrial Engineering and Engineering Management 2017. ISSN 2157-3611.s 90 - 94.s doi: 10.1109/IEEM.2017.8289857. Yu, Hao; Solvang, Wei Deng. A Carbon-Constrained Stochastic Optimization Model with Augmented Multi-Criteria Scenario-Based Risk-Averse Solution for Reverse Logistics Network Design under Uncertainty. (Fulltekst: http://www.sciencedirect.comscience/article/pii/S0959652617314944 (Sammendrag: http://www.sciencedirect.comscience/article/pii/S0959652617314944) Journal of Cleaner Production 2017; Volum 164. ISSN 0959-6526.s 1248 - 1267.s doi: 10.1016/j.jclepro.2017.07.066. Yu, Hao; Solvang, Wei Deng. Enhancing the competitiveness of manufacturers through Small-scale Intelligent Manufacturing System (SIMS): A supply chain perspective. (Fulltekst: https://www.researchgate.net/publication/316732750_Enhancing_the_competitiveness_of_manufacturers_through_Small-scale_Intelligent_Manufacturing_System_SIMS_A_supply_chain_perspective (Sammendrag: https://www.researchgate.net/publication/316732750_Enhancing_the_competitiveness_of_manufacturers_through_Small-scale_Intelligent_Manufacturing_System_SIMS_A_supply_chain_perspective) IEEE conference proceedings 2017 ISBN 978-1-5090-5330-8.s 101 - 107.s doi: 10.1109/ICITM.2017.7917904. Yu, Hao; Solvang, Wei Deng; Solvang, Bjørn. A multi-objective mathematical programming for sustainable reverse logistics network design. Part I: Model formulation. (Sammendrag: http://www.witpress.com/elibrary/wit-transactions-on-engineering-sciences/113/35213) WIT Transactions on Engineering Sciences 2016; Volum 113. ISSN 1746-4471.s 287 - 295.s doi: 10.2495/IWAMA150331. Yu, Hao; Solvang, Wei Deng; Sun, Xu. A decision-support model for operational planning of surface coal mining considering equipment failure. (Fulltekst: http://ieeexplore.ieee.org/document/7802905/ IEEE conference proceedings 2016 ISBN 978-1-5090-3074-3.s 89 - 94.s doi: 10.1109/SIMS.2016.7802905. Moore, John; Loughran, Anne; McCusker, Edel; Solvang, Wei Deng; Sziebig, Gabor; Yu, Hao; Ericson, Åsa; Holmqvist, Johann; Wenngren, Johann; Pieskä, Sakari; Vahasoyrinki, Juoni; Kaartinen, Heidi. Developing a Toolbox of supports for small and medium sized manufacturing companies. (Fulltekst: http://ieeexplore.ieee.org/document/7802907/ IEEE conference proceedings 2016 ISBN 978-1-5090-3074-3.s 101 - 104.s doi: 10.1109/SIMS.2016.7802907. Huang, Taoying; Solvang, Wei Deng; Yu, Hao. An introduction of small-scale intelligent manufacturing system. (Fulltekst: http://ieeexplore.ieee.org/document/7802896/ IEEE conference proceedings 2016 ISBN 978-1-5090-3074-3.s 31 - 39.s doi: 10.1109/SIMS.2016.7802896. Yu, Hao; Solvang, Wei Deng. A stochastic programming approach with improved multi-criteria scenario-based solution method for sustainable reverse logistics design of waste electrical and electronic equipment (WEEE). (Fulltekst: http://www.mdpi.com/2071-1050/8/12/1331 (Sammendrag: http://www.mdpi.com/2071-1050/8/12/1331) Sustainability 2016; Volum 8 (12). ISSN 2071-1050.s doi: 10.3390/su8121331. Yu, Hao; Solvang, Wei Deng; Solvang, Bjørn. A Goal Programming Approach for Green Supply Chain Network Optimization. (Fulltekst: http://www.atlantis-press.com/php/pub.php?publication=iwama-16 (Sammendrag: http://www.atlantis-press.com/php/pub.php?publication=iwama-16) Atlantis Press 2016; Volum 24 (iwama-16) ISBN 978-94-6252-243-5. ISSN 2352-5428.s doi: 10.2991/iwama-16.2016.17. Yu, Hao; Solvang, Wei Deng. An improved multi-objective programming with augmented ε-constraint method for hazardous waste location-routing problem. (Fulltekst: http://www.mdpi.com/1660-4601/13/6/548 (Sammendrag: http://www.mdpi.com/1660-4601/13/6/548) International Journal of Environmental Research and Public Health (IJERPH) 2016; Volum 13 (6). ISSN 1661-7827.s doi: 10.3390/ijerph13060548. Yu, Hao; Solvang, Wei Deng. A general reverse logistics network design model for product reuse and recycling with environmental considerations. (Sammendrag: https://www.researchgate.net/publication/296816179_A_general_reverse_logistics_network_design_model_for_product_reuse_and_recycling_with_environmental_considerations) (Prosjekt: TARGET Project) The International Journal of Advanced Manufacturing Technology 2016; Volum 87 (9). ISSN 0268-3768.s 2693 - 2711.s doi: 10.1007/s00170-016-8612-6. Yu, Hao; Sun, Xu; Solvang, Wei Deng. Implementation of Lean Philosophy and Lean Tools in Coal Mining Industry. (Sammendrag: https://www.researchgate.net/publication/296817476_Implementation_of_Lean_Philosophy_and_Lean_Tools_in_Coal_Mining_Industry) Nova Science Publishers, Inc. 2016 ISBN 978-1-63484-458-1.s 1 - 46. Yu, Hao; Solvang, Wei Deng; Solvang, Bjørn. A multi-objective mathematical programming for sustainable reverse logistics network design. Part II: Model application and analysis. (Sammendrag: http://www.witpress.com/elibrary/wit-transactions-on-engineering-sciences/113/35214) WIT Transactions on Engineering Sciences 2016; Volum 113. ISSN 1746-4471.s 296 - 303. Yu, Hao; Solvang, Wei Deng; Yuan, Song; Yang, Yong. A decision aided system for sustainable waste management. International Journal of Intelligent Decision Technologies 2015; Volum 9 (1). ISSN 1872-4981.s 29 - 40.s doi: 10.3233/IDT-140203. Yu, Hao; Solvang, Wei Deng. Route planning of municipal solid waste management: A methodology and literature review. (Sammendrag: https://www.researchgate.net/publication/290315429_Route_Planning_of_Municipal_Solid_Waste_Management_A_Methodology_and_Literature_Review) International Journal of Energy, Environment and Economics 2015; Volum 24 (2-3). ISSN 1054-853X.s 243 - 263. Yang, Jinguang; Wang, Ting; Solvang, Wei Deng; Sziebig, Gabor; Yu, Hao. Modeling,simulation and optimization of flexible manufacturing system:A case study at the workshop of Narvik University College. Modern Machinery 2015; Volum 3. ISSN 1002-6886.s 29 - 32.s doi: 10.13667/j.cnki.52-1046/th.2015.03.008. Yu, Hao; Solvang, Wei Deng; Li, Shiyun. Optimization of long-term performance of municipal solid waste management system: A bi-objective mathematical model. (Fulltekst: http://www.ijee.ieefoundation.org/vol6/issue2/IJEE_05_v6n2.pdf The International Journal of Energy and Environment 2015; Volum 6 (2). ISSN 2076-2895.s 153 - 164. Yu, Hao; Solvang, Wei Deng; Li, Shiyun. An Integrated Optimization Model for Single-product Supply Chain Network Design Considering Supplier Selection. IEEE conference proceedings 2014 ISBN 978-1-4799-7280-7.s 443 - 448.s doi: 10.1109/CogInfoCom.2014.7020495. Lu, Jiansha; Jiang, Weiguang; Li, Shiyun; Solvang, Wei Deng; Yu, Hao. A scheduling approach for ship design project with fields constraint in tasks and human resources. IEEE conference proceedings 2014 ISBN 978-1-4799-7280-7.s 37 - 41.s doi: 10.1109/CogInfoCom.2014.7020485. Yu, Hao; Solvang, Wei Deng; Yang, Jinguang. Improving accessibility and efficiency of service facility through location-based approach: A case study at Narvik university college. (Fulltekst: https://www.researchgate.net/publication/265301322_Improving_Accessibility_and_Efficiency_of_Service_Facility_through_Location-Based_Approach_A_Case_Study_at_Narvik_University_College Advanced Materials Research 2014; Volum 1039. ISSN 1022-6680.s 593 - 602.s doi: 10.4028/www.scientific.net/AMR.1039.593. Solvang, Wei Deng; Yu, Hao; Sziebig, Gábor. Developing Automated and Integrated Flexible Manufacturing System. (Sammendrag: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7020494&newsearch=true&queryText=HAO%20YU%20NARVIK) IEEE conference proceedings 2014 ISBN 978-1-4799-7280-7.s 437 - 442.s doi: 10.1109/CogInfoCom.2014.7020494. Li, Shiyun; Yang, Jinguang; Wang, Bin; Yu, Hao; Solvang, Wei Deng. A Case of Ship Design Tasks Assignment and Optimization. IEEE conference proceedings 2014 ISBN 978-1-4799-7280-7.s 79 - 83.s doi: 10.1109/CogInfoCom.2014.7020423. Yu, Hao; Solvang, Wei Deng; Chen, Chen. A green supply chain network design model for enhancing competitiveness and sustainability of companies in high north arctic regions. (Fulltekst: http://www.ijee.ieefoundation.org/vol5/issue4/IJEE_01_v5n4.pdf The International Journal of Energy and Environment 2014; Volum 5 (4). ISSN 2076-2895.s 403 - 418. Solvang, Wei Deng; Roman, Elisabeth; Yu, Hao; Mustafa, Mohamad. A Decision Support System for Establishing a Waste Treatment Plant for Recycling Organic Waste into Bio-energy in Northern Norway. IEEE conference proceedings 2013 ISBN 978-1-4799-1544-6.s 659 - 664.s doi: 10.1109/CogInfoCom.2013.6719184. Yu, Hao; Solvang, Wei Deng. A reverse logistics network design model for sustainable treatment of multi-sourced Waste of Electrical and Electronic Equipment (WEEE). IEEE conference proceedings 2013 ISBN 978-1-4799-1544-6.s 595 - 600.s doi: 10.1109/CogInfoCom.2013.6719172. Yu, Hao; Solvang, Wei Deng; Yuan, S. A Multi-objective Decision Support System for Simulation and Optimization of Municipal Solid Waste Management System. (Fulltekst: 10.1109/CogInfoCom.2012.6421978 IEEE conference proceedings 2012 ISBN 978-1-4673-5188-1.s 193 - 199.s doi: 10.1109/CogInfoCom.2012.6421978.
Andol, Eugenia Ama; Yu, Hao. Supply Chain Challenges for Effective COVID-19 Vaccine Distribution. IEEE International Conference on Industrial Engineering and Applications (ICIEA 2021) 2021-04-23 - 2021-04-26 2021.
Yu, Hao. An Hybrid Optimization-Simulation Method for a Real-World Urban Postal Service Network Redesign Problem. Invited Academic Seminar by the School of Economics and Management, China Three Gorges University 2019-11-01 - 2019.
Sun, Xu; Yu, Hao; Solvang, Wei Deng. Planning an Urban Postal Service Network by Using a Location-based Hybrid Optimization-Simulation Method: A Real-World Case Study. IEEE International Conference on Industrial Engineering and Engineering Management 2019-12-17 - 2019.
Ericson, Åsa; Wenngren, Johan; Lugnet, Johan; Heidi, Kaartinen; Pieskä, Sakari; Vähäsöyrinki, Jouni; Solvang, Wei Deng; Sziebig, Gabor; Yu, Hao; Bjørk, Erlend. Innovations & Industrial Internet. (Fulltekst: https://www.diva-portal.org/smash/get/diva2:1264143/FULLTEXT02.pdf (Sammendrag: http://ltu.diva-portal.org/smash/record.jsf?pid=diva2%3A1264143&dswid=4701) 2018 ISBN 978-91-7790-289-8.
Yu, Hao; Solvang, Wei Deng. Optimization Models and Methods for Sustainable Reverse Logistics Network Design. (Fulltekst: https://munin.uit.no/handle/10037/14737 (Sammendrag: https://munin.uit.no/handle/10037/14737) 2018 ISBN 978-82-7823-210-1.
Yu, Hao; Solvang, Wei Deng; Mustafa, Mohamad. Enhancing Competitive Competence and Sustainability of Manufacturers in Remote High-North Regions of Norway Through Holistic Supply Chain Network Design. International Conference on Cold Climate Technology 2014, ICCCT 2014 2014-05-26 - 2014-05-28 2014.
Yang, Yong; Suo, Chenxia; Solvang, Wei Deng; Yu, Hao; Zeng, Souzhen. Investigation and Analysis on Rural Residential Energy-Saving Transformation in Northern China - Taking Balin Zuoqi for Example. 2013 International Conference on Agriculture Science and Enviroment Engineering (ICASEE 2013) 2013-12-19 - 2013-12-20 2013.
Andol, Eugenia Ama; Yu, Hao. Supply Chain Challenges for Effective COVID-19 Vaccine Distribution. IEEE International Conference on Industrial Engineering and Applications (ICIEA 2021) 2021-04-23 - 2021-04-26 2021.
Yu, Hao. An Hybrid Optimization-Simulation Method for a Real-World Urban Postal Service Network Redesign Problem. Invited Academic Seminar by the School of Economics and Management, China Three Gorges University 2019-11-01 - 2019.
Sun, Xu; Yu, Hao; Solvang, Wei Deng. Planning an Urban Postal Service Network by Using a Location-based Hybrid Optimization-Simulation Method: A Real-World Case Study. IEEE International Conference on Industrial Engineering and Engineering Management 2019-12-17 - 2019.
Ericson, Åsa; Wenngren, Johan; Lugnet, Johan; Heidi, Kaartinen; Pieskä, Sakari; Vähäsöyrinki, Jouni; Solvang, Wei Deng; Sziebig, Gabor; Yu, Hao; Bjørk, Erlend. Innovations & Industrial Internet. (Fulltekst: https://www.diva-portal.org/smash/get/diva2:1264143/FULLTEXT02.pdf (Sammendrag: http://ltu.diva-portal.org/smash/record.jsf?pid=diva2%3A1264143&dswid=4701) 2018 ISBN 978-91-7790-289-8.
Yu, Hao; Solvang, Wei Deng. Optimization Models and Methods for Sustainable Reverse Logistics Network Design. (Fulltekst: https://munin.uit.no/handle/10037/14737 (Sammendrag: https://munin.uit.no/handle/10037/14737) 2018 ISBN 978-82-7823-210-1.
Yu, Hao; Solvang, Wei Deng; Mustafa, Mohamad. Enhancing Competitive Competence and Sustainability of Manufacturers in Remote High-North Regions of Norway Through Holistic Supply Chain Network Design. International Conference on Cold Climate Technology 2014, ICCCT 2014 2014-05-26 - 2014-05-28 2014.
Yang, Yong; Suo, Chenxia; Solvang, Wei Deng; Yu, Hao; Zeng, Souzhen. Investigation and Analysis on Rural Residential Energy-Saving Transformation in Northern China - Taking Balin Zuoqi for Example. 2013 International Conference on Agriculture Science and Enviroment Engineering (ICASEE 2013) 2013-12-19 - 2013-12-20 2013.