A new bipolar junction field-effect transistor (BJFET) was described. The theoretical analysis and computer simulation of BJFET obstructive characteristic are achieved. The gate bias voltage affects the BJFET obstruct...A new bipolar junction field-effect transistor (BJFET) was described. The theoretical analysis and computer simulation of BJFET obstructive characteristic are achieved. The gate bias voltage affects the BJFET obstructive voltage greatly. The BJFET obstructive characteristic is relevant to structure parameters of channel width W and channel length L. The decrease-bias-voltage operation can weaken the device obstructive characteristic. The forward turn in device forward obstructive region can also affect the BJFET obstructive characteristic. BJFET has a good high temperature obstructive characteristic and can be applying to high temperature status as high voltage switch devices.展开更多
In connection with the port facilities spatial distribution feature and volume of relevant attributes, applying of GIS technology and computer technology to build an application system to administrate port facilities,...In connection with the port facilities spatial distribution feature and volume of relevant attributes, applying of GIS technology and computer technology to build an application system to administrate port facilities, makes it convenient for port facilities administrator to know well of port facilities location and execute management. In this paper, the application and development of GIS to port facilities is studied. The main idea to understand the system design, the frame structure and its technical structure; and to demonstrate facilities information data processing＆ management and system function by connection with development instance. The construction of the system will enable the port facilities GIS become daily management tools and play an important role to improve efficiency, and promote the intelligent and convenient managemen^t of port facilities.展开更多
文摘A new bipolar junction field-effect transistor (BJFET) was described. The theoretical analysis and computer simulation of BJFET obstructive characteristic are achieved. The gate bias voltage affects the BJFET obstructive voltage greatly. The BJFET obstructive characteristic is relevant to structure parameters of channel width W and channel length L. The decrease-bias-voltage operation can weaken the device obstructive characteristic. The forward turn in device forward obstructive region can also affect the BJFET obstructive characteristic. BJFET has a good high temperature obstructive characteristic and can be applying to high temperature status as high voltage switch devices.
文摘In connection with the port facilities spatial distribution feature and volume of relevant attributes, applying of GIS technology and computer technology to build an application system to administrate port facilities, makes it convenient for port facilities administrator to know well of port facilities location and execute management. In this paper, the application and development of GIS to port facilities is studied. The main idea to understand the system design, the frame structure and its technical structure; and to demonstrate facilities information data processing＆ management and system function by connection with development instance. The construction of the system will enable the port facilities GIS become daily management tools and play an important role to improve efficiency, and promote the intelligent and convenient managemen^t of port facilities.
