Job Title Chair Professor
Office Tel No. 88610
Research Expertise Data Mining, Supply Chain Management, Business Statistics
Teaching Field Data Mining, Supply Chain Management, Business Statistics
Unit Dept. of Business Administration, Master of Business Administration Program
Experience Category Department Job Title
Current 企業管理學系 教授
Current 企業管理學系 教授
Current 企業管理學系 教授
Part Time 商學院 院長
Part Time 商學院 院長
Part Time 商學院 院長
Part Time 商學院 院長
Part Time 商學院 院長
Part Time 智慧財產研究所 代理所長
Part Time 經營管理碩士學程 代理執行長
Part Time 商學院 院長
Part Time 智慧財產研究所 代理所長
Country School Name Department Degree Duration
UNITED STATES Purdue University, Indiana Krannert Graduate School of Management Ph.D. 1981.08 ~ 1984.08
UNITED STATES Master 1979.09 ~ 1981.06
TAIWAN, REPUBLIC OF CHINA Bachelor 1972.08 ~ 1976.07
Honor Category Year Award Name Awarding Unit
Inside School 106 講座教授 政治大學
Outside School 103 中華民國科技管理學會院士 中華民國科技管理學會
Outside School 103 教育部學術獎 教育部
Inside School 103 講座教授 政治大學
Inside School 100 講座教授 政治大學
Deeds 96 TiasNimbas Fellow TiasNimbas Business School
Deeds 96 美國普度大學葛蘭管理學院講座教授 美國普度大學
Deeds 96 決策科學學會(Decision Sciences Institute)會士 決策科學學會
Deeds 92 Salgo Noren 教學獎 (MBA學生票選最優教師) 美國普度大學
Outside School 87 國立交通大學傑出校友獎 國立交通大學
Deeds 81 美國路易斯安娜州大講座教授 美國路易斯安娜州大
Deeds 77 美國總統青年學者獎 Presidential Young Investigator Award 美國國科會
Year Paper Title
2016 Fang, Y.H.*;Tang, K., 2016, 'Involuntary migration in cyberspaces: The case of MSN messenger discontinuation, ' Telematics and Informatics, Vol.34, pp.177-193.(*為通訊作者), 411389
2016 Y.L. Chen;C.C. Wu;K. Tang, 2016, 'Time-constrained Cost Sensitive Decision Tree Induction, ' Information Sciences, Vol.354, pp.140-152.(SCI), 409907
2015 Yan X.;Zhao H.;Tang K., 2015, 'Requirement or Promise? An Analysis of the First-Mover Advantage in Quality Contracting, ' Production and Operations Management, Vol.24, No.6, pp.917-933.(SCI), 409903
2014 Y. L. Chen;K. Tang;C. C. Wu;J. Y. Jheng, 2014, 'Predicting the Influence of Users’ Posted Information for eWOM Advertising in Social Networks, ' Electronic Commerce Research and Applications, Vol.13, pp.431-439.(SCI), 409906
2014 Kao H. P.;Tang K., 2014, 'Cost-Sensitive Decision Tree Induction with Label-Dependent Late Constraints, ' INFORMS Journal of Computing, Vol.26, No.2, pp.238-252.(SCI), 409905
2013 Hu H. W.;Chen Y. L.;Tang K., 2013, 'A novel Decision Tree Method for Structured Continuous-label Classification, ' IEEE Transactions on Systems, Man, and Cybernetics, Vol.PP, No.99, pp.1-13.(IEEE, SCI), 380913
2013 Tarakci H.;Tang K.;Teyarachakul S., 2013, 'Learning and Forgetting Effects on Maintenance Outsourcing, ' IIE Transactions, Vol.45, pp.449-463.(SCI), 380912
2012 Huang P.;Tang K., 2012, 'A Constructive Periodicity Bound for the Unbounded Knapsack Problem, ' Operations Research Letters, Vol.40, No.5, pp.329-331.(SCI), 380882
2009 Zhou Z.;Li Y.;Tang K., 2009, 'Dynamic Pricing and Warranty Policies for Products with Fixed lifetime, ' European Journal of Operational Research, Vol.196, No.3, pp.940-948., 348261
2009 Chen Y. L.;Kuo M. H.;Wu S. Y.;Tang K., 2009, 'Discovering Recency, Frequency, and Monetary (RFM) Sequential Patterns from Customers’ Purchasing Data, Electronic Commerce Research and Applications, ' Electronic Commerce Research and Applications, Vol.8, pp.241-251., 348258
2009 Chen Y. L.;Hu H. W.;Tang K., 2009, 'Constructing a Decision Tree from Data with Hierarchical Class Labels, ' Expert Systems with Applications, Vol.36, pp.4838–4847., 348257
2009 Chen Y. L.;Hu Y. H.;Tang K., 2009, 'Sequential Pattern Mining in Business-to-business (B2B) Environment, ' Information Sciences, Vol.35, No.6, pp.677-694., 348249
2009 Hu H. W.;Chen Y. L.;Tang K., 2009, 'A Dynamic Discretization Approach for Constructing a Decision Trees with Continuous Label, ' IEEE Transactions on Knowledge and Data Engineering, Vol.21, No.11, pp.1505-1514.(IEEE), 348250
2009 Chen Y. L.;Chia-Chi Wu;Tang K., 2009, 'Building a Cost-constrained Decision Tree with Mulitiple Condition Attributes, ' Information Sciences, Vol.179, No.7, pp.967-979., 348246
2009 Tarakci H.;Tang K.;Teyarachakul S., 2009, 'Learning Effects on Maintenance Outsourcing, ' European Journal of Operational Research, Vol.192, pp.138–150., 348238
2009 Tseng F.S.;Tang K.;Moskowitz H.;Plante R., 2009, 'Maintenance Outsourcing Contracts with Options for New Technology Adoptions, ' IEEE Transactions on Engineering Management, Vol.56, No.2, pp.203-218.(IEEE), 348239
2008 Kim I.;Moskowitz H.;Plante R.;Seo H.L.;Tang K., 2008, 'The Learning Curve: Knowledge Acquisition and Its Depreciation Revisited, ' International Journal of Operations and Quantitative Management, Vol.13, No.2, pp.77-94.(SCI), 409904
2008 Tang K;Chen Y.L;Hu H.W., 2008, 'Context-based Market Basket Analysis in Multiple-Store Environment, ' Decision Support Systems, Vol.45, No.1, pp.150-163., 348264
2006 Tarakci H.;Tang K.;Moskowitz H.;Plante R., 2006, 'Incentive Maintenance Contracts for Channel Coordination and Improvement, ' IIE Transactions, Vol.38, No.6, pp.619-632., 348266
2006 Tarakci H.;Tang K.;Moskowitz H.;Plante R., 2006, 'Maintenance Outsourcing of a Multi-process Manufacturing System with Multiple Contractors, ' IIE Transactions, Vol.38, No.1, pp.67-78., 348265
2005 Chen, Y.L.;K. Tang;R.J. Shen;Y.H. Hu, 2005, 'Market Basket Analysis in a Multiple Store Environment, ' Decision Support Systems, Vol.40, No.2, pp.339-354.(SCI), 409968
2005 Chen, Y.L.;K. Tang, 2005, 'Finding the K-th Shortest Path in a Time-Schedule Network, ' Naval Research Logistics, Vol.52, No.1, pp.93-102.(SCI), 409969
2003 Tang, K.;L. Gong;D. S. Chang, 2003, 'Optimal Process Control Policies under a Time-Varying Cost Structure, ' European Journal of Operational Research, Vol.149, pp.197-210.(SCI), 409966
2003 Chen, Y.L.;L.J. Shaio;K. Tang, 2003, 'Time Analysis for Planning a Path in a Time-Window Network, ' Journal of Operational Research Society, Vol.54, No.8, pp.860-870.(SCI), 409967
2002 Ding, J.;L. Gong;K. Tang, 2002, 'Effect of Test Equipment Uncertainty on Product Testing Decisions, ' Production and Operations Management, Vol.11, No.2, pp.125-138.(SCI), 409964
2002 Tang, K.;J. Tang, 2002, 'Optimal Time-Based Pricing and Leadtime Policies for a Build-to-order Manufacturer, ' Production and Operations Management, Vol.11, No.3, pp.374-392.(SCI), 409965
2000 Roan, J.;L. Gong;K. Tang, 2000, 'Joint Determination of Process Mean, Production Run Size and Raw Material Order Quantity, ' International Journal of Production Economics, Vol.63, No.3, pp.303-317.(SCI), 409960
2000 Williams, W. W.;K. Tang;L. Gong, 2000, 'Process Improvement for a Container-filling Process with Random Shifts, ' International Journal of Production Economics, Vol.66, No.1, pp.23-31.(SCI), 409961
2000 Chen, Y. L.;D. Rinks;K. Tang, 2000, 'The First K Minimum Cost Paths in a Time-Schedule Network, ' Journal of Operational Research Society, Vol.52, No.1, pp.102-108.(SCI), 409962
2000 Chang, D. S.;K. Tang;C .W. Lai, 2000, 'Sensor-Based On-line Screening Procedure and Tool Replacement Policy, ' International Journal of Management Theory and Practices, Vol.1, No.1, pp.65-78.(SCI), 409963
1999 Chun, Y. H.;K. Tang, 1999, 'Cost Analysis of Two-attribute Warranty Policies Based on the Product Usage Rate, ' IEEE Transactions on Engineering Management, Vol.46, No.2, pp.201-209.(IEEE), 409958
1999 Tang, K.;W. W. Williams;W. Jwo;L. Gong, 1999, 'Performance Comparison Between On-Line Sensors and Control Charts in Manufacturing Process Monitoring, ' IIE Transactions, Vol.31, No.12, pp.1181-1190.(SCI), 409959
1998 Gong L.;J. Roan;K. Tang, 1998, 'Process Mean Determination with Quantity Discounts in Raw Material Cost, ' Decision Sciences, Vol.29, No.1, pp.269-300.(SCI), 409955
1998 Chen, Y. L.;K. Tang, 1998, 'Minimum-Time Paths in Mixed-Nodes Time-Schedule Networks, ' Computers and Operations Research, Vol.25, No.10, pp.793-805.(SCI), 409957
1997 Gong, L.;J. Pruett;K. Tang, 1997, 'A Markovian Model for Process Setup and Improvement, ' Naval Research Logistics, Vol.44, pp.383-400.(SCI), 409956
1997 Chen Y. L.;K. Tang, 1997, 'Shortest Paths in Time-Schedule Networks, ' International Journal of Operations and Quantitative Management, Vol.3, No.3, pp.157-173.(SCI), 409954
1997 Liao T. W.;K. Tang, 1997, 'Automated Extraction of Welds from Digitized Radiographic Images Based on MLP Neural Networks, ' Applied Artificial Intelligence, Vol.11, pp.197-218.(SCI), 409953
1997 Tang J.;K. Tang;H. Moskowitz, 1997, 'Bayesian Estimation of System Reliability from Component Test Data, ' Naval Research Logistics, Vol.44, No.1, pp.127-146.(SCI), 409952
1997 Chen Y. L.;D. Rinks;K. Tang, 1997, 'Critical Paths in an Activity Network with Time Constraints, ' European Journal of Operational Research, Vol.100, pp.122-133.(SCI), 409951
1997 Gong L.;W. Jwo,;K. Tang, 1997, 'Using On-line Sensors in Statistical Process Control, ' Management Science, Vol.43, No.7, pp.1017-1029.(SCI), 409950
1997 Gong L.;K. Tang, 1997, 'Monitoring Machine Operations Using On-line Sensors, ' European Journal of Operational Research, Vol.96, pp.479-492.(SCI), 409949
1997 Roan J.; L. Gong;K. Tang, 1997, 'Process Mean Determination under Constant Material Supply, ' European Journal of Operational Research, Vol.99, No.2, pp.353-365.(SCI), 409947
1996 Luo Y.-L.;T.-S. Kim;T. W. Liao;K. Tang, 1996, 'An Investigation into the Influences of Operating Parameters on CMM Performances, ' Engineering Design & Automation, Vol.2, No.4, pp.269-280.(SCI), 409948
1995 Chun Y.H.;K. Tang, 1995, 'Determining the Optimal Warranty Price in the Free replacement, Fixed period Warranty Policy, ' European Journal of Operational Research, Vol.85, No.1, pp.579-593.(SCI), 409946
1994 Kim C.T.;K. Tang;M. Peters, 1994, 'A Two stage Procedure for Three class Screening, ' European Journal of Operational Research, Vol.79, pp.431-442.(SCI), 409945
1994 Tang K.;J. Tang, 1994, 'Design of Screening Procedures: A Review, ' Journal of Quality Technology, Vol.26, No.3, pp.209-226.(SCI), 409944
1994 Tang J.;K. Tang;H. Moskowitz, 1994, 'Bayesian Confidence Intervals for Reliability of Series Systems with Highly Reliable Components, ' IEEE Transactions on Reliability, Vol.43, No.1, pp.132-137.(IEEE), 409943
1993 Tang K.;J. Lo, 1993, 'Determination of the Optimal Process Mean When Inspection is Based on a Correlated Variable, ' IIE Transactions, Vol.25, No.3, pp.66-72.(SCI), 409942
1993 Tang J.;K. Tang, 1993, 'A Note on Parallel Equipment Replacement, ' Naval Research Logistics, Vol.40, pp.569-573.(SCI), 409941
1992 Chou K.;K. Tang, 1992, 'Burn in Time and Estimation of Change point with Weibull exponential Distribution, ' Decision Sciences, Vol.23, No.3, pp.973-990.(SCI), 409940
1992 Schneider H.;B.S. Lin;K. Tang, 1992, 'Renewal Function Estimation with Censored Data in a Warranty Analysis, ' Journal of Statistical Computation and Simulation, Vol.42, pp.125-135.(SCI), 409939
1992 Moskowitz H.;K. Tang, 1992, 'Bayesian Variables Acceptance Sampling Plans: Quadratic Loss Function and Step Loss Function, ' Technometrics, Vol.34, No.3, pp.340-347.(SCI), 409938
1992 Chen Y.S.;K. Tang, 1992, 'A Pictorial Approach to Poor Quality Cost Management, ' IEEE Transactions on Engineering Management, Vol.39, No.2, pp.149-157.(IEEE), 409937
1991 Park J.S.;M.H. Peters;K. Tang, 1991, 'Optimal Inspection Policy in Sequential Screening, ' Management Science, Vol.37, No.8, pp.1058-1061.(SCI), 409936
1991 Tang K., 1991, 'Design of Multi Stage Screening Procedures for a Serial Production System, ' European Journal of Operational Research, Vol.52, No.3, pp.280-290.(SCI), 409935
1990 Lo Yumei;K. Tang, 1990, 'Economic Design of Multi Characteristic Models for a Three Class Screening Procedure, ' International Journal of Production Research, Vol.28, No.12, pp.2341-2351.(SCI), 409931
1990 Schneider H.;K. Tang;C. O'Cinneide, 1990, 'Optimal Control of a Production Process Subject to Random Deterioration, ' Operations Research, Vol.38, No.6, pp.1116-1122.(SCI), 409930
1990 Ringuest J.;K. Tang, 1990, 'Empirical Comparisons of Five Procedures for Combining or Selecting Forecasts, ' Socio Economic Planning Sciences, Vol.23, No.4, pp.217-225.(SCI), 409929
1990 Schneider H.;K. Tang, 1990, 'Adaptive Procedures for the Two Stage Group Testing Problem Based on Prior Distributions and Costs, ' Technometrics, Vol.32, No.4, pp.397-405.(SCI), 409933
1990 Tang K.;H. Schneider, 1990, 'Cost Effectiveness of Using a Correlated Variable in a Complete Inspection Plan When Inspection Error is Present, ' Naval Research Logistics, Vol.37, pp.893-904.(SCI), 409932
1990 Tang K., 1990, 'Design of Product Grading Procedures, ' Decision Sciences, Vol.21, No.2, pp.434-445.(SCI), 409928
1990 Harper R.M.;J.R. Strawser;K. Tang, 1990, 'Establishing Investigation Thresholds for Preliminary Analytical Procedures, ' Auditing: A Journal of Practice and Theory, Vol.9, No.3, pp.115-133.(SCI), 409934
1989 Tang J.;K. Tang, 1989, 'A Two Sided Screening Procedure Using Several Correlated Variables, ' IIE Transactions, Vol.21, No.4, pp.333-336.(SCI), 409927
1989 Tang K.;J. Tang, 1989, 'Design of Product Specifications for Multi Characteristic Inspection, ' Management Science, Vol.35, No.6, pp.743-756.(SCI), 409926
1988 Tang K., 1988, 'Design of a Two Stage Screening Procedure Using a Correlated Variable, ' Naval Research Logistics, Vol.35, No.5, pp.513-533.(SCI), 409925
1988 Tang K., 1988, 'Economic Design of a Two Sided Screening Procedure Using a Correlated Variable, ' Journal of the Royal Statistical Society: Series C (Applied Statistics), Vol.37, No.2, pp.231-241.(SCI), 409924
1988 Peters M.;H. Schneider;K. Tang, 1988, 'Joint Determination of Optimal Inventory and Quality Control Policy, ' Management Science, Vol.34, No.8, pp.991-1004.(SCI), 409923
1988 Schneider H.;C. O'Cinneide;K. Tang, 1988, 'Optimal Control of a Production Process Subject to AOQL Constraint, ' Naval Research Logistics, Vol.35, pp.383-395.(SCI), 409922
1988 Tang K.;H. Schneider, 1988, 'Selection of the Optimal Inspection Precision Level for a Complete Inspection Plan, ' Journal of Quality Technology, Vol.20, No.3, pp.153-156.(SCI), 409921
1988 Tang K., 1988, 'Economic Design of Product Specifications for a Complete Inspection Plan, ' International Journal of Production Research, Vol.26, No.2, pp.203-217.(SCI), 409920
1988 Tang K., 1988, 'An Economic Model for Vendor Selection, ' Journal of Quality Technology, Vol.20, No.2, pp.81-89.(SCI), 409919
1987 Tang K., 1987, 'Economic Design of a One Sided Screening Procedure Using a Correlated Variable, ' Technometrics, Vol.29, No.4, pp.477-485.(SCI), 409918
1987 Ringuest J.;K. Tang, 1987, 'Simple Rules for Combining Forecasts: Some Empirical Results, ' Socio Economic Planning Sciences, Vol.21, No.4, pp.239-243.(SCI), 409917
1987 Tang K.;H. Schneider, 1987, 'The Economic Effects of Inspection Error on a Complete Inspection Plan, ' IIE Transactions, Vol.19, No.4, pp.421-428.(SCI), 409916
1987 Tang K.;R. Plante;H. Moskowitz, 1987, 'Stepwise Inspection in Bayesian Multiattribute Acceptance Sampling, ' Naval Research Logistics Quarterly, Vol.34, No.4, pp.469-486.(SCI), 409915
1987 Tang K.;M. Peters;J. Tang, 1987, 'Constructing and Maintaining a Beta Process Distribution for Bayesian Quality Audit Systems, ' IIE Transactions, Vol.19, No.1, pp.98-106.(SCI), 409914
1987 Tang K.;J. Tang;H. Moskowitz, 1987, 'Estimating Low Process Average by Inverse Binomial Sampling, ' International Journal of Production Research, Vol.25, No.1, pp.57-69.(SCI), 409913
1987 Crosby M.;R. Plante;K. Tang, 1987, 'An Economic Modelling Approach for the Determination of Materiality in Auditing, ' Decision Sciences, Vol.18, No.1, pp.108-115.(SCI), 409912
1986 Moskowitz H.;R. Plante;K. Tang, 1986, 'Multiattribute Acceptance Sampling in Serial Production Systems, ' IIE Transactions, Vol.18, No.2, pp.130-137.(SCI), 409911
1986 Tang, K.;R. Plante;H. Moskowitz, 1986, 'Multiattribute Bayesian Acceptance Sampling Plans under Nondestructive Inspection, ' Management Science, Vol.32, No.6, pp.739-750.(SCI), 409910
1985 Chand S.;K. Tang, 1985, 'A Comparison of Average and Discounted Cost Models for the Dynamic Lot Size Inventory Problem, ' European Journal of Operational Research, Vol.22, No.1, pp.9-18.(SCI), 409909
1984 Moskowitz H.;R. Plante;K. Tang;A. Ravindran, 1984, 'Multiattribute Bayesian Acceptance Sampling Plans for Screening and Scrapping Rejected Lots, ' IIE Transactions, Vol.16, No.2, pp.185-192.(SCI), 409908
Project Category Year Project Title Participartor Job Title Period Unit
MOST Projects 106 新興科技創新營運模式-金融科技創新營運研究中心設立與維運計畫-總計畫及子計畫四(1/4) 唐揆,王儷玲,別蓮蒂,吳安妮,李佳玲,邱志聖,陳恭,彭金隆,諶家蘭,蘇威傑 計畫主持人 2017.06 ~ 2018.05 科技部
Other Projects 106 106學年度新南向計畫-強化與東協及南亞國家合作交流學術型領域聯盟(亞洲的全球轉型-政大聯盟辦公室) 陳樹衡,莊慧玲,馮展華,蘇玉龍,唐揆,楊昊,劉幼琍 協同主持人 2017.03 ~ 2017.12 教育部
Other Projects 106 大學校院推展國際共同培育人才計畫(第二年) 唐揆 計畫主持人 2017.01 ~ 2017.12 教育部
Other Projects 105 聯合利華股份有限公司產學合作高階主管培訓課程計畫 唐揆 計畫主持人 2016.01 ~ 2017.12 聯合利華股份有限公司
Other Projects 105 大學校院推展國際共同培育人才計畫(第一年) 唐揆 計畫主持人 2016.01 ~ 2016.12 教育部
MOST Projects 104 經由數據取得策略來有效處理產品原生評論中之遺失值(3/3) 唐揆 計畫主持人 2017.08 ~ 2018.07 科技部
MOST Projects 104 經由數據取得策略來有效處理產品原生評論中之遺失值(2/3) 唐揆 計畫主持人 2016.08 ~ 2018.07 科技部
MOST Projects 104 經由數據取得策略來有效處理產品原生評論中之遺失值(1/3) 唐揆 計畫主持人 2015.08 ~ 2018.07 科技部
Other Projects 104 高階文官培訓飛躍方案-104年訓練變革領導與組織創新課程策略合作案 唐揆 計畫主持人 2015.06 ~ 2015.10 國家文官學院
Other Projects 103 高階文官培訓飛躍方案103年訓練領導相關課程策略合作案 唐揆 計畫主持人 2014.07 ~ 2014.10 國家文官學院
Other Projects 103 產學合作高階主管培訓課程計畫 唐揆 計畫主持人 2014.05 ~ 2015.12 台北金融大樓股份有限公司
Other Projects 103 大聯大與政大「供應鏈管理」產學合作計畫 唐揆 計畫主持人 2014.01 ~ 2016.12 大聯大文教基金會
Other Projects 102 產學合作高階主管培訓課程計畫 唐揆 計畫主持人 2013.06 ~ 2013.08 台北金融大樓股份有限公司
MOST Projects 101 社會網絡的資訊擴散(2/2) 唐揆,方郁惠 計畫主持人 2013.08 ~ 2014.07 科技部
MOST Projects 101 社會網絡的資訊擴散(1/2) 唐揆,方郁惠 計畫主持人 2012.08 ~ 2013.07 科技部
MOST Projects 101 社會網絡的資訊擴散(延攬) 唐揆 計畫主持人 2012.08 ~ 2013.07 科技部
Other Projects 101 產學合作高階主管培訓課程計畫 唐揆,張愛華 計畫主持人 2012.06 ~ 2013.01 遠東國際商業銀行股份有限公司
Other Projects 101 101年度高階文官培訓飛躍方案『領導管理課程』 唐揆,張愛華 計畫主持人 2012.06 ~ 2012.09 國家文官學院
Other Projects 100 100學年度商管專業學院申請計畫 唐揆 計畫主持人 2011.08 ~ 2012.12 教育部
Other Projects 100 產學合作高階主管發展課程第一年計劃案 唐揆,陳春龍 計畫主持人 2011.04 ~ 2012.07 味全食品工業股份有限公司
Other Projects 100 產學合作初階行銷企畫培訓課程重整與中階行銷主管培訓課程 唐揆,陳春龍,別蓮蒂,張愛華 計畫主持人 2011.02 ~ 2015.12 味全食品工業股份有限公司
Other Projects 81 Quality Management and Information Systems Enhancement for LSU's QBA Department 唐揆 計畫主持人 1992.08 ~ 1993.07 Louisiana Board of Regents
Other Projects 81 Skilled Labor Worklife and Benefit: A Case Study of Divers in Oil and Gas Exploration 唐揆 計畫主持人 1992.08 ~ 1993.07 Association of Diving Contract
Other Projects 77 Cost Effective Complete Inspection Procedures 唐揆 計畫主持人 1988.08 ~ 1994.07 美國國科會