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Background Accurate measurement of esophageal pressure (Pes) depends on proper filling of the balloon. Esophageal wall elastance (Ees) may also influence the measurement. We examined the estimation of balloon-surrounding elastance in a bench model and investigated a simplified calibrating procedure of Pes in a balloon with relatively small volume. Methods The Cooper balloon catheter (geometric volume...
In this paper, a study of a high-precision temperature-voltage converting circuit for RF power calorimeter is presented. It consists of a constant current source and a matching output part. Both of two parts are designed and implemented in order to calibrate RF power. The development of RF power calibration is based on the principle of substituting direct power for RF power, which is very mature technique...
A main challenge to wireless network performance management is how to estimate and monitor the wireless network coverage. In this paper a novel Machine to Machine (M2M) facilitated wireless network coverage prediction and real-time monitoring method is proposed. This method uses the telematics devices in connected vehicles to measure the wireless network performance with an auto-adaptive scheduling...
A reactive power standard, based on the current comparator power bridge, established at CEPRI, for calibrating active/reactive power/energy meters under sinusoidal conditions is described. It allows calibration of active/reactive power and energy meters at voltages between 60 V to 600 V and currents between 0.1 A to 200 A, any power factor from zero lag through unity to zero lead, and test frequencies...
A method using solid-phase extraction for cleanup, followed by high-performance liquid chromatography with ultraviolet detection (HPLC/UV), was developed for the determination of forchlorfenuron residues in Fruit and vegetable. The forchlorfenuron is extracted from the sample (15 g) with ethyl acetate (30 mL), and the extract is loaded onto an ENVI-18 column. The forchlorfenuron is eluted with methanol-water...
This paper describes the establishment of a single-phase power/energy standard at CEPRI. It is based on a computer-controlled commercial version of a NRC developed current-comparator-based power/energy bridge. The bridge allows the calibration of single-phase active/reactive power and energy meters at voltages up to 600 V, currents up to 100 A, any power factor from zero lag through unity to zero...
Most approaches to vehicle tracking have adopted a single calibrated camera for the task, which leads to an under-conditioned problem. We present a surveillance system for on-line vehicle tracking based on two cameras and structure from motion (SfM). Our surveillance system starts by tracking feature points. A novel matching scheme is proposed that allows a subset of feature points to be corresponded...
The use of simulation packages is essential for software engineers to evaluate a specific control strategy or algorithm. This paper presents an energy management strategy development process of hybrid electric vehicles (HEV) to demonstrate the model-based development methodology. The control algorithms are modeled, simulated and optimized in the environment of Matlab/Simulink/Stateflow. A code generator,...
CAN communication between the hybrid vehicle controller and other controllers are very important to realize and implement a reliable control strategy. And the CAN communication protocol has to cooperate with the SAE J1939 protocol to communicate with the engine management system (EMS) and other components already exits which conform to SAE J1939. And because the HEV control system is a distributed...
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