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Striving for sustainability has been adopted as a core value and guiding principle for development in the twenty-first century worldwide. Considering the learnings and changes of sustainability in society, especially the connection between software understanding and hardware construction was the key issue for the government. After the Earthquake 921 in 1999, the damages of school buildings started...
Convolutional neural networks (CNNs) are inherently limited to model geometric transformations due to the fixed geometric structures in their building modules. In this work, we introduce two new modules to enhance the transformation modeling capability of CNNs, namely, deformable convolution and deformable RoI pooling. Both are based on the idea of augmenting the spatial sampling locations in the...
In this paper, we propose a monocular SLAM system for robotic urban search and rescue (USAR), based on which most USAR tasks (e.g. localization, mapping, exploration and object recognition) can be fulfilled by rescue robots with only a single camera. The proposed system can be a promising basis to implement fully autonomous rescue robots. However, the feature-based map built by the monocular SLAM...
Software change histories are results of incremental updates made by developers. As a side-effect of the software development process, version history is a surprisingly useful source of information for understanding, maintaining and reusing software. However, traditional commit-based sequential organization of version histories lacks semantic structure and thus are insufficient for many development...
DC resistive type superconducting fault current limiters (SFCL) can be used in multi-terminal DC systems for fault current limiting. They help DC circuit breakers interrupt fault current with lower interruption overvoltage and they improve the interruption reliability. Insulation design is necessary for the application of SFCLs. The objective of this paper is to design the insulation of DC resistive...
A novel phase reconfigurable synthesized transmission line is proposed in this paper. By utilizing quasi-lumped elements and varactor diodes, the synthesized line functions as a 1-bit phase shifter by switching its electrical length between two states; the characteristic impedance, meanwhile, is kept unaltered. The design concept, circuit model, and performance are carefully investigated and discussed...
A novel phase reconfigurable synthesized transmission line is proposed in this paper. By utilizing quasilumped elements and varactor diodes, the synthesized line functions as a 1-bit phase shifter by switching its electrical length between two states; the characteristic impedance, meanwhile, is kept unaltered. The design concept, circuit model, and performance are carefully investigated and discussed...
Organic carrier is the main factor affecting the morphology of the glass frit sintering, and the shape of the sintering determines the quality of the laser encapsulation. In this work, the volatility of single solvent and mixed solvent have been analyzed, and the sintered temperature curve has been optimized. After the sintering, scanning electron microscopy (SEM) images of the single solvent and...
A narrow pulse driver circuit was studied in this paper. we proposed and demonstrated a method combining the analog circuit and the digital circuit. By analyzing the working principle of transistor, we selected the HEMT transistor as a high-speed switch. It can supply voltage pulse or current pulse according to different applications. The generation of trigger signal, controls of the pulse width and...
A wavelength scanning system with ultrahigh-resolution is proposed and demonstrated for displacement sensing. Light from a linewidth-narrowed and frequency-stabilized laser is put into an electro-optic modulator (EOM) which is connected to a microwave source (MS), and the frequency of the radio frequency (RF) signal output from the MS is set to scan from 2.3 GHz to 6.5 GHz with a high resolution covering...
Based on the optical characteristics of the solid F-P etalon, the sensitivity to the angle and transmission is discussed. By slightly changing the angle of the incident light, the transmittance waveform of the etalon has a significant phase shift, and which become more and more rapidly with the increase of the angle. Through the stability analysis of transmission waveform in different regions, it...
Due to the unique data structure, the big datagram is prone to packet loss during the network outburst transmission process, especially in the space TT&C (Tracking, Telemetry and Communication) network which is very strict in real time. This paper focuses on the analysis of the transmission mechanism of big datagram, expatiates its fragmentation, reorganization and Re-fragmentation mechanism....
With the rapid development of modern microelectronics and optoelectronics technology, a novel potential sealing method,Laser-assisted glass frit bonding (hereafter referred to as Laser bonding), are proposed for encapsulating electronic, optical, and miniature micro-mechanical devices that require a hermetic seal with long-term stability. In this work, we fabricated two kinds of glass pastes which...
This paper concentrates on the issue of finite-time controller design for periodic systems with random transmission delays over networked control systems. The definitions of stochastic finite-time stability and finite-time boundedness are respectively given at the beginning of this paper. Then, based on the Lyapunov function and the linear matrix inequalities (LMIs) technique, the sufficient conditions...
We present the first fully convolutional end-to-end solution for instance-aware semantic segmentation task. It inherits all the merits of FCNs for semantic segmentation [29] and instance mask proposal [5]. It performs instance mask prediction and classification jointly. The underlying convolutional representation is fully shared between the two sub-tasks, as well as between all regions of interest...
Recently, deep learning has been introduced to classify hyperspectral images (HSIs) and achieved effective performance. In general, the previous networks are not enough deep, which might not extract very discriminant features for classification. In addition, they do not consider strong correlations among different hierarchical layers. Due to the two problems, a hybrid deep residual network is presented...
Multiwavelength Brillouin Erbium fiber laser with ultra-narrow bandwidth filter is used as a temperature sensor. It has less than 10−3 °C resolution at the 3rd-order Stokes in the short term. 3.104 MHz/°C sensitivity of the 3rd-order Stokes wavelength are demonstrated, which is three times that of the 1st-order Stokes wavelength. A less than 0.2 °C temperature error is obtained for every Stokes wavelength...
Visual tracking is a fundamental problem in computer vision. Recently, some deep-learning-based tracking algorithms have been achieving record-breaking performances. However, due to the high complexity of deep learning, most deep trackers suffer from low tracking speed, and thus are impractical in many real-world applications. Some new deep trackers with smaller network structure achieve high efficiency...
With the rapid development of cloud computing, more and more users choose to deploy the application services on the virtual machine in the cloud platform. OpenStack is one of the most popular platforms in open source. At present, there are a few researches on the load balancing of virtual machines in cloud platform. Most of the researches adopt the traditional dynamic load balancing algorithm, the...
This paper proposes a novel pulse-width-amplitude-modulation (PWAM) method for three-phase quasi-Z source inverter system in motor drive application. It is demonstrated that it operates at only 1/3 switching frequency of traditional PWM methods, with less harmonic distortion. As a result, switching actions and losses are also reduced significantly. With the proposed modulation, the required capacitance...
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