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We report progress of the self-sustaining magnetometer. The sensitivity follows a faster τ−1 rule rather than τ−1/2 rule with time, and it can be close to the shot noise limit in a much shorter time.
An inherent variable stiffness approach was proposed to suppress the rebound and impact of the electrostatic switch due to waveform deviations. A simple clamped-guided beam spring with large deflection, which generated inherent cubic nonlinear restoring force, was adopted for implementation of the approach. The initial stiffness is very small but increases significantly with the displacement. In this...
The electrode constitutes the key element of the atom probe (AP) pulse signal generator. The AP parameter Monte Carlo (MC) analysis is introduced. The AP microelectrode is designed with 50-Ω loaded microstrip line centered by via hole. The excitation square wave pulse presents 300-ps duration and 1-kV amplitude. The worst cases of the signal integrity is performed with MC analysis applied to the electrode...
An RF electromagnetic (EM) characterization of high pulsed voltage electrode is investigated in the present paper. The electrode acts as an electric-or E-field pulse generator for atom probe tomography (APT) application. The proposed electrode device is essentially comprised of a microstrip transmission line (TL) combined with via hole. The challenging prediction of the electrode signal integrity...
Here we propose and demonstrate a new type of microsphere whispering gallery mode (WGM) resonator with microsphere-microsphere coupling. The coupler consists of a microsphere attached to a single mode fiber (SMF) tip by use of UV adhesive. The microsphere-microsphere coupling system is robust, compact in size, easy in fabrication and stable in operation and has good Q-factor of 4.72×103. The WGM resonator...
This paper reports a novel inertial microswitch with synchronous follow-up compliant electrodes for extending output switch-on pulse width. The flexible movable electrode and stationary electrode are proposed to keep a continuous duration contact by double-stair and spring-shape structures, which can not only extend the output switch-on pulse width but also reduce the impact bounces. Then the inertial...
This paper presents a nonlinear electrostatic actuator which utilizes the nonlinear mechanical properties of the classical clamped-guided beam springs with large deformation to slow impact velocity of the movable plates. The initial stiffness of the spring is very small but increases significantly with the displacement. In this way, the increased kinetic energy would be limited. At the same time,...
A novel graphene biosensor based on self-assembly protein film modified graphene targeting biomolecules is presented in this literature. Bovine serum albumin (BSA) molecules in inorganic solution are self-assembled and aggregated on the graphene surface uniformly with the driving of heating for the first time. Atomic force microscope (AFM) and Raman spectra are used to investigate denatured BSA modified...
To reduce the cost of the Nd-Fe-B magnets, Ce which is one of the most abundant rare earth metals in the world, is suggested to be used as a replacement of Nd element.
Nowadays, people are aware that many of the social changes and problems facing humanity cannot be solved by economic development or technological change alone. In recent years, many researchers have called for more attention to be given to social demand and social change. Although the concept of social innovation is still vague, solving social challenges through social innovation is considered to...
An optical diagnostic system to investigate the vacuum breakdown under microsecond pulsed voltage is constructed, which consists of a vacuum breakdown chamber of a high-voltage pulse driver and a high speed camera system. The jitter of the breakdown time delay is on the range of microsecond. To determine the moment of exposure, the gate-monitor output is compared with discharge current measured by...
Combined cooling, heating and power (CCHP) system has been widely used all over the world due to its high efficiency, environmental protection, economy and reliability. The basic meaning and significance of CCHP are presented. The CCHP system for active distribution network is proposed in view of the deficiency in the current CCHP system. In this work, the process and advantage of this system are...
In order to adapt to the active control and management of active distribution network (ADN), this paper proposes a new combined cooling, heating and power (CCHP) system. The electric heat pump is used to consume the power generated by the generator for adjusting the power peak of the network, and let the renewable energy generation sent more power to the ADN. The storage tank is integrated with the...
The global adoption of consumer devices capable of wide connectivity like smartphones and tablets have led to improvements in their support infrastructure. These make e-health systems for rehabilitation entirely feasible. Current assessments of patient condition can be subjective and inconsistent as the monotony of repetitious tasks lowers alertness. We propose a system to automate the scoring process...
A criterion to describe the turn-to-turn discharge of the secondary winding in Tesla transformers is presented. Factors which have influences on the turn-to-turn insulation of the winding such as the wire diameter, the wire distance, the void size, the purity of transformer oil and the insulation strength of the wire are researched based on this criterion. By theoretical calculation, the electric...
We demonstrate an optical Fabry-Perot interferometer fiber tip sensor based on an etched end of multimode fiber filled with ultraviolet adhesive. The fiber device is miniature and robust, in a convenient reflection mode of operation, has a high temperature sensitivity of 213 pm/°C within the range from 55 to 85°C, a good refractive index sensitivity of ∼−73.54 nm/RIU (refractive index unit) within...
We derived a preemphased prime frequency multicarrier method to assess and optimize an integrated dual-carrier 1-Tb/s transmitter. A 64QAM (54 Gbaud) and a 32QAM (64 Gbaud) mode have been derived. Transmission experiments yield 295 and 620 km transmission reach.
We report on the characteristics of a tunable hybrid external cavity laser using silicon nitride microring resonators. A wavelength tuning range covering from 1530nm to 1580nm is demonstrated with a side mode suppression ratio larger than 45dB. Typical linewidth values are 65kHz.
In this paper, an ultra-wideband (UWB) bandpass filter with a notch band is presented. It consists of a stub-loaded resonator and two feeding lines. The proposed resonator, with a center-loaded short stub and two open stubs, is theoretical analyzed by even- and odd-mode analysis. The first four resonance frequencies can be conveniently adjusted and this enables the convenient design of UWB filters...
A lin-par-lin Ramsey-CPT microwave atomic clock with dispersion detection is investigated in this paper, in which high signal contrast and narrow linewidth are obtained. The pulsed transmitted laser is synchronously detected by a sample-and-hold amplifier and a lock-in amplifier. The frequency shift of the microwave, represented by the output of the lock-in amplifier is acquired. An instability is...
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