This paper discusses how the coupling capacitor of transmission line in high speed circuit is optimized. Take the 400G bit error tester as an example, the characteristic impedance of the transmission line before and after adding the coupling capacitor is simulated. In order to reduce impact on signal integrity caused by impedance mismatch, the treatment method of voiding is obtained through the impedance calculation formula. By comparing several different voiding scheme proposed by predecessors, on the basis of the previous work, the hollowing treatment is further optimized to study the effect of hollowing size on signal integrity. Then HFSS software is used for modeling and simulation, and the insertion loss and return loss under several different schemes are calculated. It is found that the size of the hollowing process will have a certain impact on the integrity of the signal, and to a certain extent, the larger the hollowing size, the smaller the insertion loss and return loss.
As an important enabling way to realize digital transformation and promote intelligent upgrading, digital twins have been attracting attention from all walks of life, and have moved from theoretical research to practical application. At present, most domestic elevators still use the traditional dispatching system. The traditional elevator dispatching system can't realize intelligent elevator man-machine interaction, which leads to a series of problems such as low efficiency and poor linkage of elevator group control. Thus, this paper designs an intelligent elevator dispatching system based on digital twins, which combines digital twins with artificial intelligence identification technology, internet of things, cloud database technology and so on. The system consists of four parts: physical elevator model, virtual elevator model, elevator twin data model and mobile phone client. Furthermore, the rational allocation of elevator resources is strengthened, and the interaction ability between elevators and passengers is enhanced. While improving the comfort of passengers, it also reduces the energy consumption of the elevator macroscopically.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.