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Mobile medical applications are increasingly being used by patients and consumers. However, due to their complexity, these applications are normally only accessible to smartphone users. People using low-end cellphones cannot benefit from this new technology. The goal of this paper is to expand health service platform to lower-end cellphones, so that people in underdeveloped regions can benefit from...
In this note, under time varying undirected graph, we discuss fixed-time consensus of multi-agent systems and present one framework for constructing effective distributed protocols, which is continuous and distributed state feedbacks. Based on the theory of fixed-time stability, and we prove that if the sum of time intervals is larger than a given time, and the bounded of initial states is known,...
We proposed a hybrid powered ankle exoskeleton. It can be able to supply positive mechanical power to the user during the swing phase of gait. The hybrid powered ankle exoskeleton was composed of a pair of compressed springs and a cable-driven actuator fasted to the shin. It was lightweight, and permitted the cable-driven actuator to provide the forces at the biological level to the ankle joint. Meanwhile...
In this note, we investigate the fixed time consensus in probability for stochastic multi-agent systems under undirected graph. First, a nonlinear consensus protocol with Gaussian white noise is given, and the concept of fixed-time consensus in probability is given. Second, we prove that multi-agent systems can achieve fixed-time consensus in probability under undirected topology by using graph theory,...
This paper studies multi-AUV cooperation as the research object, aiming at the problems that the traditional contract network has low overall efficiency, unreasonable distribution and coexistence of multiple tenders, a multi-AUV target allocation strategy based on improved contract network is proposed. This paper introduces the token ring network can improve the efficiency of AUV internal communication...
Precise and reliable position and heading information are critical to the dynamic positioning vessel. The position and heading information relies on the system's measuring sensor. In order to solve the sensor fault problem, in this paper, the states estimation of the system is proposed by using the Extended Kalman Filter (EKF). The faults are detected by the residual error generated by the predicted...
In dealing with complex environment AUV cooperative path planning, traditional particle swarm optimization (PSO) algorithm because of its lack of constraints, in the update process will have a certain probability to produce an infeasible path. In addition, for the nearshore shallow sea environment, its ocean currents will have a certain impact on the movement of AUV. Considering the above problems,...
The degradation behavior of the solder joint under constant vibration loading is discussed, the voltage value at both sides of the solder joint is taken as the degradation characteristic. Considering the heteroskedasticity of characteristic signal under the vibration loading, the general time series model cannot describe heteroskedasticity, a Generalized Autoregressive Conditional Heteroskedastic...
Dental pulp stem cells (DPSCs) are stem cellspresent in the dental pulp and have same renewal anddifferentiating properties as bone marrow cells. Hence, DPSCs canbe used for future regenerative therapies of various diseases.Previous studies show that DPSCs would lose their differentiationcapability during long-term passage when they were cultured inmedium promoting differentiation. Researchers have...
WLAN often adopts the user ID and password to judge the legitimacy of users, but the hacker can illegally access the WLAN by sniffing the legal user's ID and password. To solve this problem, a novel authentication scheme is introduced. The scheme makes good use of the user's MAC address and RSSI location fingerprint as authentication information to control the user to access the WLAN. The legal user...
With rapid development of medical information, more and more attention has been paid to the intelligent diagnosis based on electronic medical records. The results of intelligent diagnosis can provide doctors with advice in the course of diagnosis and treatment, and avoid unnecessary mistakes. In the field of intelligent text aided diagnosis, how to extract and express a large amount of text information...
Both traditional coarse-grained and fine-grained Flash Translation Layer schemes are unsuitable for ultra-large SSDs. They produce overmuch mapping entries which fail to be kept in embedded DRAM completely and can suffer severely from low spatial and temporal localities. In this paper, we propose a novel KV-FTL for ultra-large SSDs, which mostly maps logical addresses to physical addresses via a simple...
It is well known that excessive drinking could result in human diseases (e.g., liver disease and cardiovascular disease). To investigate the underlying mechanisms of the effects of alcohol consumption, dental pulp stem cells have been used due to their self-renewal capability, multi-lineage differentiation, and clonogenic efficiency. Researchers usually focus on detecting genes having different mean...
Body weight support (BWS) system is increasingly used in conjunction with treadmills to assist the patients with neurological impairments. Owing to lower limbs of the patients unable to bear the whole weight during the rehabilitation training, some weight can be removed to help the patients recover the basic walking ability gradually. Therefore, considering the man-machine relationship and the effects...
The weapon target assignment (WTA) problem is a fundamental problem arising in defense-related applications of operations research. The multi-stage weapon target assignment (MWTA) problem is the basis of the dynamic weapon target assignment (DWTA) problem which commonly exists in practice. The MWTA problem considered in this paper is formulated as a multi-objective constrained combinatorial optimization...
Interactive multiobjective optimization (IMO) methods aim at supporting human decision makers (DMs) to find their most preferred solutions in solving multiobjective optimization problems. Due to the subjectivity of human DMs, human fatigue, or other limiting factors, it is hard to design experiments involving human DMs to evaluate and compare IMO methods. In this paper, we propose a framework of a...
Auctions have been adopted by many major cloud providers, such as Amazon EC2. Unfortunately, only simple auctions have been implemented. Such simple auction has serious limitations, such as being unable to accept elastic user demands and having to allocate different types of VMs independently. These limitations create a big gap between the real needs of cloud users and the available services of cloud...
In this paper, a combined control strategy based on Model Predictive Control(MPC) and Extended State Observer(ESO) is proposed to solve the output fluctuation problem caused by the variation of load resistance and input voltage. The optimal control strategy means that Model Predictive Controller is used as the main controller. The Extended state observer is used to observe the disturbance from a variety...
Intelligent prosthetics aim to provide a communication channel between disabled people and external world. Among them, walking-assistive device to help people with lower-limb disability attracts attention but still limited by unnatural gait or lack accurate real-time control. Here we studied the coupling between the upper limbs and the lower limbs since the whole body actually involved during walking...
Due to the difference between kinematics of human joints and exoskeleton joints, joint misalignment may be brought about by human-machine interface (HMI). Joint misalignment may lead to undesired interaction forces, if not copped with properly, e.g. in the HMI mechanism with straps. In this paper, firstly the interaction forces caused by joint misalignment in HMI mechanism with straps are studied...
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