Empirical Test of Wagner＇s law in New Public Management Countries＇ Tax Revenue

The essence of empirical test of Wagner characteristic in new public management countries＇ tax revenue is to test the influence of economic growth on tax growth since new public management movement. Under IMF statistical framework, by using E-G two-step method in co-integration test and Granger causality test and empirically testing of the gross tax revenue and classified tax revenue in Australian, Canada, France, America, Britain these five countries, we can find that most indicators in most countries do not confirm to Wagner＇ s law. With the growth of GDP, tax revenue as a percentage of GDP rises periodically but not permanently. This period can be called the validity period of Wagner＇ s law in financial scale.

一种账户分配和动态密码管理的方法

为解决现有技术中预先存储的账号和密码被泄露后所造成的安全隐患问题,文章介绍一种账户分配方法,该方法的流程包括:操作员在操作设备之前发起操作请求;管理设备根据该操作请求,为其生成一个临时账户和密码;由于该密码存在有效期,因而在操作员对设备执行完申请的操作后,之前生成的临时账户和密码将会被禁止继续登录设备。通过申请临时账号的方式,避免了由于密码泄露而造成的安全事件,并且有效地降低了维护的成本。

20(S)-原人参二醇自微乳释药系统的处方优化和有效期预测

目的:优化20(S)-原人参二醇自微乳释药系统处方并预测其有效期。方法:以油相中油酸质量分数、油相比例、乳化剂与助乳化剂比值为自变量,载药量,粒径,Zeta电位和优选10 min时药物溶出度为因变量,采用星点设计-效应面法优选20(S)-原人参二醇自微乳的处方组成;利用单因素试验优选制备工艺;通过Q10法在较高温度下进行加速试验,预测该制剂的有效期。结果:自微乳的最佳处方为油相中油酸质量分数84.09%,油相比例30%,乳化剂-助乳化剂(2.58∶1);载药量102.22mg·g-1,粒径39.67 nm,Zeta电位-13.1 m V,10 min时药物溶出度75.01%。制备工艺参数为混合方式为磁力搅拌,混合速度400 r·min-1,混合时间30 min,混合温度45℃。Q10法预测自微乳的室温贮存有效期约1.51年。结论:优选的制剂处方合理、工艺可行、样品稳定性良好,可为20(S)-原人参二醇的新型制剂探索提供研究数据。