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We present a video-based method to monitor blood pressure by analyzing pulse transit time (PTT). The PTT is determined from ballistocardiogram (BCG) and photoplethysmogram (PPG), which are recorded simultaneously using a single camera. The measured blood pressure changes are compared with those measured with a cuff-based reference blood pressure monitor. In addition to blood pressure, premature ventricular...
Recently, the satisfiability modulo theories (SMT) is concerned widely in both the industry and academia, it is different from the traditional Boolean satisfiability problem (SAT) because of its higher abstraction and stronger representation. However, the application is not limited to the satisfiablity, which also needs the quantity of the solution. At the same time, the solution space calculated...
The study of interface/surface states in photonic crystals provides new approaches to control the flow of light. In this work, a new type of interface states in two-dimensional photonic crystals is experimentally realized and characterized [1]. The existence of this type of interface states is solely dependent on the reflection properties of the bulk photonic crystals without any surface/interface...
According to the enterprise's three-level (energy-using units, energy management, financial audit) management style, we take the cost and the consumption of coal, electricity, water, gas, wind in the process of iron and steel production as the main management object and design the informationalized management system for energy consumption and cost of enterprise internal LAN to improve the energy efficiency...
We theoretically and experimentally demonstrate that by utilizing a new freedom introduced by spatial dispersions in the effective parameters, Brewster effect can be extended from a single angle to a range of angles, enabling wide-angle impedance matching and total transmission of light through the surface. By designing pure dielectric photonic crystals with spatial dispersions, we demonstrate an...
One S-band high-power GaN-based power amplifier (PA) is investigated. The design of the multi-stage PA and the biasing circuit are investigated seperately, including the two stages of power amplifiers which delivers about 50dBm of saturated output power in class AB from 2.7 to 2.9 GHz and the bias control channel which provides special bias and power sequencing for GaN HEMTs. Overall circuits operating...
A user-based tourist attraction recommender system is developed in this paper. The recommender system is constructed as an online application which is capable of generating a personalized list of preference attractions for the tourist. Modern technologies of classical recommender system, such as collaborative filtering are considered to be effectively adopted in the tourism domain. On the basis of...
Ground on features of application systems with workflow as the core, this paper tailors “software process based on workflow”, which focuses on three areas: workflow diagrams, user task interface, and business logic. In addition to, it analyzes and defines the basic tasks, the basic roles and basic working product to complete these three areas. This paper is to draw up development steps and illustrate...
Portal as one of the visibility determination methods is widely used for large scale indoor scene. With the deepening research, we find that portal can do more works than we thought, including simulating mirror, connecting cells and dividing cells more simply. In this paper, first, we give the basic conception of portal, analyze the status and development trend of it, and divide portal into two categories:...
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