The first chapter 1 1 introduction 2 paper organization structure 1The second chapter system related theory and technology overviews 1 MVC pattern basic principle 2 MVC framework 3Section 1 for ammeters MVC framework profile 2 MVC framework advantages of 3 the Entity Framework of 4 LINQ profile 5 Jquery 7The third chapter 9 of system analysis and 1 system overview 2 system development technology and tools 3 system functional division 4 system， the general framework 1 level classification 2 functions and duties as 10The rule 3 module partition and interaction design 11The design of the interface 4 possible actions 5 system adopts the mode of design 5 establish systems use case model of 17The role of Sure 1 2 create cases of 3 building use case diagram of 6 system entity class design 20The fourth chapter of the s
1 Introduction 1 Introduction 2 onions The nutritional content of 2 onion 2 3 The health onion 2 4 juice vegetable juice clarification method 3 1 Enzyme treatment 3 2 deal with ultrafiltration membrane 4 3 to clarify the 5-treated 5 to clarify the preservation methods of onion juice 5 1 Preservation potassium sorbate 5 1 Preservation of citric acid 5 6 Prospect of 6 2 Materials and Methods 6 1 Test materials， equipment and reagents 6 1 Test Materials 6 2 Test apparatus 6 3 Test Kit 7 2 Test Method 7 1 Preparation of onion juice 7 2 onion juice clarification 7 3 to clarify the clarification of onion juice preservation 7 3 Results and Analysis 7 1 onion juice pectinase treatment to determine the optimal dosage of 7 2 onion juice pectinase processing time to determine the optimum water bath 8 3 pectinase treatment of onion juice to determine the optimum water temperature of 9 4 Orthogonal analysis of onion juice pectinase to clarify the role of the optimal conditions for 10 5 to clarify the preservation of onion juice test 11 1 to clarify the degree of cold storage on the impact of 11 2 to clarify the degree of citric acid on the impact of 12 3 Potassium Sorbate onion juice during the period of preservation to clarify the impact of 14 degrees Potassium sorbate and citric acid 4 to clarify the impact of the degree of contrast 15 4 Conclusion 16 5 References 16 6 a vote of thanks 18
