联合战术信息分发系统(Joint Tactical Information Distribution System,JTIDS)作为Link16的通信载体为多军种协同作战提供服务。当前,高精尖武器装备的数量激增,进而JTIDS终端增多,导致非正交跳频层叠网间的邻频干扰和同频干扰发生的...联合战术信息分发系统(Joint Tactical Information Distribution System,JTIDS)作为Link16的通信载体为多军种协同作战提供服务。当前,高精尖武器装备的数量激增,进而JTIDS终端增多,导致非正交跳频层叠网间的邻频干扰和同频干扰发生的概率很大。基于此,分析了改用高斯最小频移键控(Gaussian Minimum Shift Keying,GMSK)调制后,JTIDS的频谱特征。同时,仿真分析了改进系统对于互干扰和同频干扰的健壮程度。仿真结果表明,在邻频干扰和同频干扰下,JTIDS误码率显著提高,使用复杂度更高的GMSK解调的JTIDS性能比原系统更好。展开更多
Objective To understand the effectiveness and problems of centralized drug procurement in China by analyzing the implementation of the“4+7”pilot work for centralized drug procurement in China.Methods The current sit...Objective To understand the effectiveness and problems of centralized drug procurement in China by analyzing the implementation of the“4+7”pilot work for centralized drug procurement in China.Methods The current situation and existing problems of drug procurement in China were analyzed through the literature research method.Results and Conclusion At present,good social benefits have been achieved for China’s drug procurement through pilot projects in several cities,but there are some serious problems.The proposed countermeasures will help to improve the procurement of pharmaceuticals in China.展开更多
Objective To explore the impact of the“4+7”city drug centralized procurement policy implemented from April 1st,2019 on China’s pharmaceutical market and the differences between this pilot scheme and the first volum...Objective To explore the impact of the“4+7”city drug centralized procurement policy implemented from April 1st,2019 on China’s pharmaceutical market and the differences between this pilot scheme and the first volume procurement,so as to put forward some suggestions for this policy and improve the drug price formation mechanism.Methods The characteristics of the“4+7”volume procurement policy and its improvements were summarized through literature research,and the distribution of the winning enterprises in volume procurement was shown by the chart.Then the overall situation of pharmaceutical enterprises in China was analyzed.Results and Conclusion According to the main distribution of enterprises in the alliance region,we can see that the first round of bid-winning enterprises with 25 varieties are mainly distributed in the eastern coastal cities of Jiangsu,Zhejiang,Shandong,and Guangdong,which shows a trend of developing to provinces of Sichuan,Hubei,and Hunan.With the increase of volume procurement inland cities will be included in the future.This pilot scheme of volume procurement is a reform of the entire pharmaceutical industry.It has improved the market structure and promoted the transformation and upgrading of regional medicine representatives.The most important thing is to enable the public to better enjoy the benefits brought by the low-priced drugs.However,for some pharmaceutical enterprises and drug retail industry,it is a challenge.Therefore,it is necessary to improve the policy and strengthen market supervision and management.展开更多
文摘联合战术信息分发系统(Joint Tactical Information Distribution System,JTIDS)作为Link16的通信载体为多军种协同作战提供服务。当前,高精尖武器装备的数量激增,进而JTIDS终端增多,导致非正交跳频层叠网间的邻频干扰和同频干扰发生的概率很大。基于此,分析了改用高斯最小频移键控(Gaussian Minimum Shift Keying,GMSK)调制后,JTIDS的频谱特征。同时,仿真分析了改进系统对于互干扰和同频干扰的健壮程度。仿真结果表明,在邻频干扰和同频干扰下,JTIDS误码率显著提高,使用复杂度更高的GMSK解调的JTIDS性能比原系统更好。
基金Source of the project:Shenyang Pharmaceutical University 2019 college students innovation and pioneer projectLecturer support project for School of Business Administration,Shenyang Pharmaceutical University in 2019.
文摘Objective To understand the effectiveness and problems of centralized drug procurement in China by analyzing the implementation of the“4+7”pilot work for centralized drug procurement in China.Methods The current situation and existing problems of drug procurement in China were analyzed through the literature research method.Results and Conclusion At present,good social benefits have been achieved for China’s drug procurement through pilot projects in several cities,but there are some serious problems.The proposed countermeasures will help to improve the procurement of pharmaceuticals in China.
文摘Objective To explore the impact of the“4+7”city drug centralized procurement policy implemented from April 1st,2019 on China’s pharmaceutical market and the differences between this pilot scheme and the first volume procurement,so as to put forward some suggestions for this policy and improve the drug price formation mechanism.Methods The characteristics of the“4+7”volume procurement policy and its improvements were summarized through literature research,and the distribution of the winning enterprises in volume procurement was shown by the chart.Then the overall situation of pharmaceutical enterprises in China was analyzed.Results and Conclusion According to the main distribution of enterprises in the alliance region,we can see that the first round of bid-winning enterprises with 25 varieties are mainly distributed in the eastern coastal cities of Jiangsu,Zhejiang,Shandong,and Guangdong,which shows a trend of developing to provinces of Sichuan,Hubei,and Hunan.With the increase of volume procurement inland cities will be included in the future.This pilot scheme of volume procurement is a reform of the entire pharmaceutical industry.It has improved the market structure and promoted the transformation and upgrading of regional medicine representatives.The most important thing is to enable the public to better enjoy the benefits brought by the low-priced drugs.However,for some pharmaceutical enterprises and drug retail industry,it is a challenge.Therefore,it is necessary to improve the policy and strengthen market supervision and management.
