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We report on on-chip electro-optic tuning of high-Q lithium niobate microresonator with integrated in-plane microelectrodes fabricated by femtosecond laser. Due to the compact spatial arrangement, high electro-optical tuning coefficient of 3.41 pm/V was demonstrated.
Hand gesture recognition is highly valued for its potential applications in contactless human-computer interaction (HCI). Aiming at the problem that the gesture recognition system based on ordinary camera is susceptible to different lighting conditions and complex background environment, an improved algorithm based on depth image for fingertip detection and gesture recognition is proposed. Firstly,...
Surface electromyography (sEMG) is widely used in clinical diagnosis, rehabilitation engineering and humancomputer interaction and other fields. In this paper, we use Myo armband to collect sEMG signals. Myo armband can be worn above any elbow of any arm and it can capture the bioelectric signal generated when the arm muscles move. MYO can pass of signals through its low-power Blue-tooth, and its...
A 40 GHz asynchronous harmonic mode-locked Er-doped fiber laser is demonstrated for the first time. Long-term stability is achieved through low-frequency electronic feedback and the impact of modulation depth on allowable detuning range is investigated.
In this paper, a magnetron-driven system with simple preheat method and power modulation is presented. Since the resonance microwave transmission of the magnetron requires a stable DC high-voltage and an AC preheating voltage, this paper is devoted to simplifying the system architecture while a sufficient resonant gain to drive the magnetron is ensured. In this design, a simple preheating method using...
Sub-threshold circuit is a promising circuit design style for IoT application, but the timing closure, especially hold timing fixing is a big challenge for designers. This paper proposes a mathematical method to estimate the number of insertion inverters/buffers for hold timing fixing in each short path. Firstly, the distribution of path delay is rigorously proved to be lognormal distribution in the...
With the rapid development of optical industry and computer technology, optical interference measurement has become an important means of non-contact measurement. The noise and uneven distribution of light intensity are the main problems in the interference image, which make the traditional threshold segmentation methods are difficult to accurately segment the image. Based on twice mean filter subtraction,...
Sn-3.0Ag-0.5Cu lead-free solder, PCB copper clad laminate and copper thin film substrate were used as experimental materials and the Cu/SAC305/Cu interconnection plate-level structure micro-solder joint was prepared by pulsed hot-pressing welding test. The author aimed at investigating the pulse welding time, pulse welding temperature and welding pressure which influence on the microstructure of solder...
With the rapid development of the electronic industry, it is critical for electronic packaging industry to develop superior materials with high thermal conductivity and lower cost, so as to dissipate heat from the central components. Metallic materials are compelling in thermal conductivity application over decades. However, it is still a great challenge to synthetize metal nanomaterials which have...
This paper mainly studies the influence of loading rate on the shear mechanical properties of BGA solder joints, four kinds of solders (SAC305, SAC0307, SAC0307-0.07La and SAC0307-0.07La-0.05Ce) were prepared by means of experiment. The results show that the shear strength of the solder joints in the single board structure was increased with the increase of shear rate, but the shear strength of high-silver...
We proposed a unified application model for virtual mobile infrastructure called FUSION. FUSION bridges the gap between the remote VMI server and the client-side mobile device via supporting bi-directional IPC(inter-process communication) and loosely synchronized file system. FUSION classifies IPC events into two types: IPC events without accessing local resources and IPC events accessing local resource...
Data open sharing becomes the basis for mining the potential value of big data. Due to the different structure of different shared data sources, the upper layer application is restricted. Therefore, how to establish a unified and user friendly logical organization form is an urgent problem to be solved in the open sharing of data. This paper presents a method of data organization based on ontology...
In this paper, a new method of position along with node teaching and placement is proposed. Different from the traditional triangulation position, the proposed method employs a faster computation technique with special proximity learning and placement, which leads to reduced computational time. In position computation, the received signal strength indication (RSSI) values from ZigBee CC2431 modules...
This article presents an adjustable pipeline inspection robot with three belt driven mechanical modules. The adjustable pipeline robot can be used for 30–45cm diameter pipeline. This robot has three powered belt driven chains each of which has a mechanical clutch. The mechanical clutch is used a 3-bars linkage type mechanism. The robot is designed foldable when each chain contacts the ground or wall...
Noninvasive assessment of corneal mechanical properties in vivo will help to the understanding of the pathogenesis and early diagnosis of ectatic corneal disorders. This study presented a noninvasive method that assesses the corneal biomechanical properties by exciting the cornea with acoustic radiation force and monitoring its displacement using a dual-frequency confocal transducer. A 3.85-MHz pushing...
Electrical stimulation therapy (EST) of lower esophageal sphincters (LES) is a new technique for the treatment of gastroesophageal reflux disease (GERD). In this paper, an implantable LES stimulator with wireless power transmission is proposed for the treatment of GERD. The LES stimulator is composed of an implantable pulse generator (IPG), an external controller, and a wireless power transmission...
This paper focuses on adaptive neural control design for n-link robot manipulator systems in the presence of tracking error and velocity state constraints. A performance function is utilized to characterize the prescribed performance of the tracking error. A new transformed function is used to guarantee that tracking errors satisfy the prescribed performance and the velocity states are not to violate...
Due to the relative position invariance of L2 Libration point in the Earth-moon system, Halo orbits around LL2 adapt to the best mission trajectory for Lunar Relay Satellite, which can offer relay communication for space missions such as deep-space exploration and Moon outpost construction. In order to improve the payload launch capacity of Lunar Relay Satellite, the electric thrusters which have...
In this paper, we experimentally demonstrate the performance of crosstalk mitigation for 16QAM-OFDM-carrying OAM multiplexed FSO links by using the pilot assisted Least Square (LS) algorithm. Crosstalk is introduced by demodulation holograms with random turbulent phase screen at the demodulation SLMs. Experimental results show that the proposed algorithm can efficiently improve the quality of constellations...
The design and simulations of a Ku-band 1-bit reconfigurable transmitarray is presented. The proposed element consists of two orthogonal H-shaped slots and a coupling microstrip transmission line. By controlling the two PIN diodes integrated on the transmission line, opposite ends of the receiving H-shaped slot are excited, thus achieving 1-bit quantized phase with 180° phase difference. The simulated...
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