摘要：IBS是临床上常见的功能性胃肠病之一,内脏高敏感是其主要病理基础。肠道菌群在其发病过程中扮演重要角色。肠道菌群调节内脏高敏感的主要机制涉及迷走神经调控、免疫递质合成、代谢改变、肠道屏障破坏和炎症介导等方面,现就其具体机制进行综述。

摘要：本文首先论述了当前大型远洋航运公司的管理信息系统所存在的不足之处 ,强调了建立一个比较实时的船舶航海信息采集系统对于航运管理决策具有的重要意义 ;然后比较详细地叙述了设计和开发船舶航海信息采集系统MIGS的方法 ,内容包括系统体系结构 ,系统功能结构 ,船岸通信和数据库设计等。该系统已成功运行在某公司的近 5 0 0条远洋运输船舶上。

摘要：This paper introduces a homemade injection-enhanced gate transistor （IEGT） with blocking voltage up to 3.7 kV. An advanced cell structure with dummy trench and a large cell pitch is adopted in the IEGT. The carrier concentration at the N-emitter side is increased by the larger cell pitch of the IEGT and it enhances the P-i-N effect within the device. The result shows that the IEGT has a remarkablely low on-state forward voltage drop （VCE（sat）） compared to traditional trench IGBT structures. However, too large cell pitch decreases the channel density of the trench IEGT and increases the voltage drop across the channel, finally it will increase the VCE（sat） of the IEGT. Therefore, the cell pitch selection is the key parameter consideration in the design of the IEGT. In this paper, a cell pitch selection method and the optimal value of 3.3 kV IEGT are presented by simulations and experimental results.