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A silicon three-grating microring is proposed and characterized as a device enabling 3×3 optical switching based on orbital angular momentum and wavelength. Bit error rate measurements show penalties <1dB for OOK traffic up to 20Gbaud.
In this paper, a scheme of small body autonomous optical navigation is presented which takes the opportunity feature region (OFR) as the navigation characteristic, aiming at the requirements of autonomy, real-time and navigation precision for small body exploration mission. The search criterion of the OFR is given after defining the OFR. Then, perform the detection and matching process of OFRs in...
In this paper, we investigate multi-message authentication to combat adversaries with infinite computational capacity. An authentication framework over a wiretap channel (W_1, W_2) is proposed to achieve information-theoretic security with the same key. The proposed framework bridges the two research areas in physical (PHY) layer security: secure transmission and message authentication. Specifically,...
In order to further improve the riding comfort of trackless rubber tire vehicle, to ensure the safety of coal mine underground transportation, a quarter vehicle of the dynamics equation was established for two-degree of freedom suspension system. And the underground road roughness value of the input signal was calculated. Then based on the Simulink module of MATLAB software, the mathematical simulation...
A PD nonlinear dynamic inverse guidance law finite time convergence is proposed for the problem of UAV's collision avoidance in this paper. First, a proportional-derivative nonlinear dynamic inverse guidance law, which can be applied to multiple initial angles and speeds, is designed to ensure the security of UAV's collision avoidance. In addition, the stability of guidance law is proved by the circle...
Growing complexity in modern software is making signature-based intrusion detection an increasing challenge. Many recent intrusion detection systems rely on accurate recovery of application semantics from memory. In this paper, we approach the problem from a different angle. We observe that the user applications in corporate network often run in identical system environments due to standardized IT...
The inverse kinematics solution of the Six-DOF Serial Robots is a highly complex nonlinear problem, and the existence of the solution is not unique, therefore, the inverse kinematics method has attracted extensive attention. In this paper, BP neural network is applied to the inverse kinematics of Six-DOF Serial Robots, and the process of inverse solution is transformed into training of network weights...
An L/S-Band antenna for a special aerocraft application is proposed in this paper. This antenna is composed with a microstrip antenna for L-band with circular polarization and unidirectional radiation and a biconical antenna for S-band with vertical polarization and omni-directional radiation. The microstrip antenna is placed above the biconical antenna and both of their feeding points are at the...
Human neuron action potential detection has a great application in the field of neurosciences and neurotherapy. However, traditional technology can hardly perform a non-invasive action potential (AP) detection for small axon such as human neuron axon. We propose a new AP detection method by measuring the AP induced magnetic pulse signal utilizing nitrogen vacancy (NV) centers in nanodiamond. This...
Countless progress and efforts have been made toward cancer diagnosis and management upon frontier interdisciplinary. The outstanding physical and biochemical properties of the magnetsomes in magnetotactic bacteria find potential application in bioimaging and diagnostics of tumor. We present magnetic sensing of magnetization of the magnetsomes in magnetotactic bacteria using nitrogen vacancy centers...
As the social economy, urbanization and city expansion develop synchronously in China, new requirements on the planning, safety maintenance and optimal performance of transportation, particularly on public transportation, are put forward. This paper conducts a detailed conceptual study on a novel bus-type travel means-long-distance public passenger transportation system (LPPT), which can strength...
A linear actuator suitable for sun tracking applications, heliostats, was investigated. First, a benchmark actuator was modelled using Finite Element (FE) analysis and then a prototype was constructed. The electromagnetic force on the mover was simulated and was found to be in excellent agreement with experiment. Next; a three-phase, direct-drive, linear actuator was proposed, which has a step size...
This paper presents the dynamics analysis of laparoscope arm for Minimally Invasive Surgical Robot(MISR), and the inverse dynamics model of the laparoscope arm is established according to the general equation of multi-body dynamics and Lagrange equations. Complete virtual prototype model of laparoscope arm is established in Adams. The theoretical driving torques/force of the dynamic model are got...
Ionospheric clutter is the primary factor that affecting High Frequency Surface Wave Radar (HFSWR) detection performance. In order to draw up an adaptive detection strategy suitable in various environment, a novel algorithm is proposed in this paper to recognize ionospheric clutter. The algorithm firstly extracts a series of features, after that, it takes advantage of Genetic Algorithm (GA) to select...
The RD (Range-Doppler) spectrum of signal received from high frequency OTHR (over-the-horizon radar) consists of two Bragg peaks. However, contaminated by ionosphere, both two Bragg peaks will be shifted. A method based on Kullback-Leibler (KL) divergence and centroid, named Mode-Kullback-Leibler-Centroid (MKLC), is proposed to get a better estimate of the center frequency of RD spectrum. In the real...
Image captioning is a challenging problem owing to the complexity in understanding the image content and diverse ways of describing it in natural language. Recent advances in deep neural networks have substantially improved the performance of this task. Most state-of-the-art approaches follow an encoder-decoder framework, which generates captions using a sequential recurrent prediction model. However,...
The rapid development of the Internet of Things (IoT) has brought great changes for non-contact and non-destructive sensing and diagnosis. For every inanimate object can tell us something by the sound it makes, acoustic sensor demonstrates great advantages comparing to conventional electronic and mechanic sensors in such cases: overcoming environmental obstacles, mapping to existing use cases of detecting...
A cavity-less optical frequency comb with accurate 50-GHz comb pitch is achieved using a 10-GHz RF source via the temporal Talbot effect. The comb is implemented as a Nyquist-shaped 32-GBaud 16-QAM data transmitter.
As the cost of human full genome sequencing continues to fall, we will soon witness a prodigious amount of human genomic data in the public cloud. To protect the confidentiality of the genetic information of individuals, the data has to be encrypted at rest. On the other hand, encryption severely hinders the use of this valuable information, such as Genome-wide Range Query (GRQ), in medical/genomic...
Vehicular communication networks expect to accommodate the ever-increasing on-road wireless traffic by deploying roadside units (RSUs) and meanwhile exploiting existing wireless infrastructures. To achieve flexible deployment, energy-saving operation and low-latency services, a new type of RSUs, namely cache-enabled green RSUs are introduced, which can store popular contents locally and harvest renewable...
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