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Examples of Equations in Pulp and Paper Science: Their Meaning and Usefulness
Received:October 30, 2020  
DOI：10.11980/j.issn.0254-508X.2021.01.010
Key Words:pulp and paper science  fiber flocculation  physical laws  equations  mathematical modeling
Fund Project:国家重点研发计划“高性能纸基复合材料共性关键技术研究及产业化”（2017YFB0308300）。
Author NameAffiliationPostcode
ZHAO Joe R.H. Tri-Y Environmental Research Institute，Vancouver，BC， V5M 4P7，Canada
Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021
University of British Columbia Pulp and Paper Centre，Vancouver， BC， V6T 1Z4，Canada 		V6T 1Z4
ZHANG Meiyun Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
KEREKES Richard J. Tri-Y Environmental Research Institute，Vancouver，BC， V5M 4P7，Canada
University of British Columbia Pulp and Paper Centre，Vancouver， BC， V6T 1Z4，Canada 		V6T 1Z4
MCDONALD J. David Tri-Y Environmental Research Institute，Vancouver，BC， V5M 4P7，Canada
JDMcD Consulting Inc.，Vaudreuil-Dorion，Quebec， J7V 0G1， Canada 		J7V 0G1
CHEN Jiachuan State Key Lab of Bio-based Material and Green Papermaking，Qilu University of Technology（Shandong Academy of Sciences）， Ji’nan，Shandong Province， 250353 250353
WAN Jinquan State Key Lab of Pulp and Paper Engineering， South China University of Technology，Guangzhou，Guangdong Province， 510640 510640
KONG Fangong State Key Lab of Bio-based Material and Green Papermaking，Qilu University of Technology（Shandong Academy of Sciences）， Ji’nan，Shandong Province， 250353 250353
SUN Jiaojiao Tri-Y Environmental Research Institute，Vancouver，BC， V5M 4P7，Canada
State Key Lab of Bio-based Material and Green Papermaking，Qilu University of Technology（Shandong Academy of Sciences）， Ji’nan，Shandong Province， 250353 		250353
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Abstract:This paper described examples of equations employed in pulp and paper science to predict the influences of key variables on pro-ducts and processes. Some equations were derived long ago in other scientific disciplines and adapted for use in pulp and paper technology. Other equations were developed by pulp and paper researchers from basic principles to meet unique needs not addressed in the existing scientific literature. The origin， meaning， and uses of the equations were described briefly.Among them， "Crowding Number for Pulp Fiber Flocculation" was rarely mentioned before.
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