Technology Of Analysis To Abnormal Values In Dam Safety Monitoring Data And Its Computer Creation

The dam safety monitoring is an important method to disclose the dam actual work condition, and the analysis to the monitoring material is scientific basis to judge project in safety or not. By reorganization, analysis and model building to the monitoring material, we may make the appraisal with the dam condition, discover the security hidden danger in dam early, and establish safety processing measure.In the dam safety monitoring material, there are possibly some abnormal values. They will work on the appraisal with the dam structure condition and dam safety monitor greatly, sometimes even will recieve the dam objective condition in falsify. Therefore, before the application of dam safety monitoring material, we should do judgment and processing with the abnormal values, eliminate the false and retain the true to make the analysis job done in the reliable data foundation. What the judgement and processing of abnormal values invole is wide and circumstance is complicated, whether misjudge or leak to judge will bring the disadvantageous influence with the dam condition analysis and the safety appraisal, therefore, the judgement and processing of abnormal values are not only important content of the dam safety monitoring material analysis, but also main one of the dam safety monitoring information management system and policy-making support difficult problems.This article unified some statistics test methods, mathematical model methods and so on commonly used nowadays with Visual Basic technology to establish the program for abnormal values. According to the flow of the checkout, analyse firstly different test methods , including the graph method, statistics test method and mathematical model method and so on, these methods can identify the abnormal values from the different angle and the different emphasis point, and discovers the abnormal values in the great degree; Then also did much exploratory work on Visual Basic technology for realizing the chechout of abnormal value, especially on imaging, database and interface and so on. Thereinto it was advantageous to have a view or compare among several documents at the same time that adopt the MDI window as the primarily surface; Adopted user-definedreference frame to plan graph that is convenient for controlling imaging in requested period of time; Used relations database Access which Office brings to operate simply, that is convenient for Visual Basic programming; The ADO DATA database connection control has vivid use, simple link,and its technique is mature; Images of Suspiciousvalues' environment quantity factor is direct-viewing and clear......; Finally through twoexamples to analyse concretely, example horizontal shift analysis emphasized on the study according to the process of the programme handling abnormal values through the motheds of mathematic statistic , mathematical model etc., then example some gate dam emphasized on dam security worker's genetic analysis to the suspiciously values and the dam condition appraisal.Analysis technology of dam safety monitoring abnormal values involves widely, and it is difficult to realize it by computer completely, there is a mass of work to wait for further studies. This article only executes to the function which offers a few ordinary introductory remarks so that others may offer their valuable ideas.