Optical circulators that unidirectionally route light could lead to bidirectional operations in applications data centers and telecommunications, as well sensors. In this work, the best of our knowledge, we present first realization integrated optical on silicon are electrically driven dynamically reconfigurable. The proposed device utilizes microrings with a bonded magneto-optic cladding alongside an electromagnet for nonreciprocal behavior. This novel approach does not use permanent magnet...

We discuss the thermal management of microring lasers on hybrid silicon platform in order to optimize their high-temperature lasing performance. The impedance was improved with a novel shunt design. report significant improvement laser performance, maximum continuous wave stage temperature up 105 °C.

In this work, we propose ultra-low-complexity design solutions for multi-group multicast beamforming in large-scale systems. For the quality-of-service (QoS) problem, by utilizing optimal structure obtained recently [2], convert original problem into a non-convex weight optimization of lower dimension and two fast first-order algorithms to solve it. Both are based on successive convex approximation (SCA) provide iterative updates each SCA subproblem. The first algorithm uses saddle point...

The millimeter-wave (mmWave) technology is one possible solution to addressing the explosive requirements for mobile data access on high-speed railways (HSRs). However, utilizing mmWave HSRs will result in large Doppler shifts, which should be estimated and compensated. Traditional shift estimators, such as cyclic prefix (CP)-based estimator (CPBE), two-training-symbol-based (TBE), best linear unbiased (BLUE), have inferior estimation accuracy especially at low signal-to-noise ratio (SNR)....

Transmission loss of the leaky coaxial cable (LCX) is increasing with operating frequency. In order to avoid large transmission attenuation LCX at higher frequency, proposition replacing circular waveguide construct put forward in this letter. The spatial harmonics and their radiation conditions proposed dielectric-filled are analyzed. near field patterns simulated analyzed, from which cutoff frequency extracted. This kind desired generate uniform radio wave coverage replace applications...

We propose a first-order fast algorithm for the weighted max-min fair (MMF) multi-group multicast beamforming problem in large-scale systems. Utilizing optimal structure obtained recently, we convert nonconvex MMF into min-max weight minimization and show that it is weakly convex problem. using projected subgradient (PSA) to solve directly, instead of conventional method requires iteratively solving its inverse PSA our has closed-form updates thus computationally cheap. Furthermore,...

This paper presents a large dynamic range, low noise integrated circuit for readout of bulk micro-machined vibratory gyroscope. With the proposed Sinusoidal Chopper technique and Differential-Common Duo-Opamp structure, three main objectives are achieved: frequency cancellation; biasing high impedance nodes in traditional fully-differential circuit; linearity capacitance-voltage conversion. These characteristics promise an enhanced range. Furthermore, demodulation is also design, purpose not...

The millimeter-wave (mmWave) technology is one possible solution to addressing the explosive requirements for mobile data access on high-speed railways (HSRs). However, utilizing mmWave HSRs will result in large Doppler shift, which should be estimated and compensated. Traditional shift estimators including cyclic prefix (CP) based estimator (CPBE), two-training-symbol (TBE) best linear unbiased (BLUE) have inferior estimation accuracy especially at low signal-to-noise ratio (SNR). In this...

We consider multi-group multicast beamforming in large-scale systems to minimize the transmit power subject signal-to-interference-plus-noise ratio (SINR) requirements. Based on optimal structure, we propose a fast first-order algorithm obtain solution. The utilizes successive convex approximation (SCA) method and solves each SCA subproblem by dual reformulation along with extra-gradient for closed-form updates. Initialization methods are also explored, including an extragradient-based...

The SRI (conventional island closed cooling water system) is mainly to supply the for principal equipment in turbine building and pump building, including auxiliary coolers, generator feedwater deaerator cooler. Due numerous users, operating mode of pumps variable, such as single mode, double short time triple mode. switch modes depends on operator command, which increases workload well introduces risk human failure. After study, some timing sequence control logic modified order have an...

It requires a large number of temporary ground wires for maintenance tasks in distribution network. Because the can be grounded anywhere, it is difficult to check their states and control them. Currently solutions are generally expensive city-scale. This paper presents method that integrates complex monitor, communication modules into pocket computer key. The abundant controlled by simple electric lock, which will downgrade cost whole system. also proposed graph-base wire management...

For the special telephone communication needs of broadcast and TV, we discuss how to implement diversiform services in VoIP systems based on Session Initiation Protocol (SIP). A new method SIP-B2BUA is proposed then it. First, a B2BUA component designed implemented. The not only can do basic functions B2BUA, but also has smart dial-plan an API application modules. Second, it discussed that call-processing ability extends for more by smartly service includes callback service, Auto Call...

We review our recent progress in hybrid silicon microring lasers and photodetectors for a transceiver. High-temperature continuous-wave lasing high-speed operation both are demonstrated.

读出电路位于微传感器系统信号通路的最前端,是决定系统性能的关键因素。本文针对音叉式体硅微陀螺的具体应用,提出了一种低噪声电容读出电路,芯片采用斩波技术降低了电路的低频1/f噪声、失调电压以及参考电压失配的影响,提高了读出电路的分辨率和动态范围;提出一种噪声电荷转移的分析方法,用于分析和预测读出电路的噪声性能;建立一种简化的微陀螺传感器仿真模型,用于模拟读出电路对微传感器的响应。读出电路在0.35 m 2P4 M 标准CMOS工艺下设计流片,并与微传感器进行了联合应用,芯片面积为22.5 mm2,在5 V电源电压,100 kHz的时钟频率下,实现了4 aF的电容分辨率和94 dB的动态范围。

In this work, we propose ultra-low-complexity design solutions for multi-group multicast beamforming in large-scale systems. For the quality-of-service (QoS) problem, by utilizing optimal structure obtained recently [2], convert original problem into a non-convex weight optimization of lower dimension and two fast first-order algorithms to solve it. Both are based on successive convex approximation (SCA) provide iterative updates each SCA subproblem. The first algorithm uses saddle point...