Aiming at localizing the telemetric capsule for detecting gastrointestinal physiological parameters in vivo accurately,a portable alternating current(AC)electromagnetic localization system is designed.To verify the fe...Aiming at localizing the telemetric capsule for detecting gastrointestinal physiological parameters in vivo accurately,a portable alternating current(AC)electromagnetic localization system is designed.To verify the feasibility of the method,the model and construction of the localization system are detailed.And static and dynamic accuracy of the localization system are tested by experiments.Next,we compare the simulating results of the electromagnetic radiation aroused by the localization system with the electromagnetic safety standards of human(ICNIRP guidelines and IEEE standard C95.1-1991).Finally,in terms of the results of the static and dynamic experiments,conclusions are drawn that the accuracy of portable positioning system is high(less than 10 mm)enough to satisfy the localization need of the micro invasive medical devices in vivo,and there is no harm of electromagnetic radiation to human.展开更多
The geomagnetic field may play a key role in orientation and navigation of many long-distance mi- gratory animals. Taking homing and migrating birds as examples, this paper reviews recent progress in studies of geomag...The geomagnetic field may play a key role in orientation and navigation of many long-distance mi- gratory animals. Taking homing and migrating birds as examples, this paper reviews recent progress in studies of geomagnetic "compass" of animals. Moreover, we propose to address two aspects in future geomagnetic orientation research :(1) what are the true components of the "map"? ( 2 ) What are the magneto-receptors and which brain areas acquire and process the geomagnetic field informa- tion ?展开更多
基金National Natural Science Foundation of China(NSFC)(No.30570485)National High Technology Research and Development Program of China(863)(No.2006AA04Z368)Natural Science Foundation of Shanghai,China(No.06ER1406)
文摘Aiming at localizing the telemetric capsule for detecting gastrointestinal physiological parameters in vivo accurately,a portable alternating current(AC)electromagnetic localization system is designed.To verify the feasibility of the method,the model and construction of the localization system are detailed.And static and dynamic accuracy of the localization system are tested by experiments.Next,we compare the simulating results of the electromagnetic radiation aroused by the localization system with the electromagnetic safety standards of human(ICNIRP guidelines and IEEE standard C95.1-1991).Finally,in terms of the results of the static and dynamic experiments,conclusions are drawn that the accuracy of portable positioning system is high(less than 10 mm)enough to satisfy the localization need of the micro invasive medical devices in vivo,and there is no harm of electromagnetic radiation to human.
文摘The geomagnetic field may play a key role in orientation and navigation of many long-distance mi- gratory animals. Taking homing and migrating birds as examples, this paper reviews recent progress in studies of geomagnetic "compass" of animals. Moreover, we propose to address two aspects in future geomagnetic orientation research :(1) what are the true components of the "map"? ( 2 ) What are the magneto-receptors and which brain areas acquire and process the geomagnetic field informa- tion ?
