《违法犯罪人员信息数据库》的每个记录都在不同程度地老化。特别是年龄、身高、体态、住址、单位、特长、人体表面的特殊标记(纹身、美容修饰部位、伤残部位和程度、疤、痣、瘤、记)、作案手段特点、主要接触关系等项极易变动,如果不及时更新就会影响应用效果。我们发现哪个单位库内信息新鲜,哪里的利用率和破案率就高。同时我们也发现,信息的老化速度与城市建设、犯罪人员的年龄、经济状况、现行的经济体制等多方面因素相关联。因此,我们在建库过程中采取边建库边更新边使用的办法,使多年积累的资料中的死亡信息激活,使老化信息逐渐更新。在违法犯罪人员资料中,重复犯罪者的年信息更新量和劣迹人员重复犯罪率,如果按全年20%信息更新率计算,三至五年数据库将要更新一次。从有劣迹人员自身情况分析来看,累犯中75%左右年龄在18岁到33岁之间;50%左右是经济收入较好或经济收入无保障的无固定职业者。这些人生活无规律,交往 Each record of the “database of information about the crimes of criminals” ages to varying degrees. Especially the age, height, body shape, address, unit, specialty, special markings on the human body surface (tattoos, cosmetic parts, parts and degrees of disability, scar, nevi, neoplasm), modus operandi, main contact Very easy to change, if not updated will affect the application results. We found that which unit of fresh information in the library, where the utilization rate and detection rate is high. At the same time, we also find that the speed of information aging is related to various factors such as urban construction, the age of criminals, economic conditions and the existing economic system. Therefore, in the process of building a database, we adopted the method of updating and using while building the database to activate the death information in the data accumulated over the years and gradually update the aging information. In the information on offenders and criminals, the number of repeat updates of offenders and the rate of repeat offenders on repeat offenders are repeated. If the information rate is updated at 20% for the full year, the database for three to five years will be updated once again. Judging from the analysis of their own circumstances, about 75% of the recidivists are between the ages of 18 and 33, and about 50% are unemployed persons with better economic incomes or no guaranteed economic income. These people have irregular life and contacts