Thermal performance of a 6m-long Oscillating Heat pipe (OHP) for balloon-borne General Anti-Particle Spectrometer (GAPS) experiment has been investigated. The developed OHP is a closed loop type and U-shaped due to the mission detector requirements. R410A is selected as the working fluid for the use at low temperature. We achieved a thermal conductance of 18.7 W/K for 150 W heat input with 16 t...

There are a lot of ways to achieve large current pulse power supply, and the more common way is to adopt the inverter switching circuit to achieve pulse power supply. The core of the NC power supply design of large current and wide frequency pulse in SEAM is using two-stage modulation. Combined with inverter technology, DC chopper technology and NC technology, it not only can achieve the adjust...

In this paper methods to determine the group delay of vented boxes and techniques for the design of filters for group delay equalization are presented. First the transfer function and the related group delay are explained. Then it is shown how the group delay can be computed or approximated for a certain alignment of the box. Furthermore it is shown how to derive the required parameters of the ...

Currently, International Space Station (ISS) crews use a laptop computer to display procedures for performing onboard maintenance tasks. This approach has been determined to be suboptimal. A heuristic evaluation and two studies have been completed to test commercial off-the-shelf (COTS) “near-eye” heads up displays (HUDs) for support of these types of maintenance tasks. In both studies, subject...

Exploring efficient and cost-saving electrocatalysts is essential to the renewable energy storage utilization, which still in its embryonic period. MOFs have drawn tremendous attention due their adjustability, abundant active sites, plentiful pores. Notably, satisfactory electrocatalytic performance has been achieved by MOFs-based comparable traditional electrocatalysts. State-of-the-art works ...

The double-layer plate structure in passive sound insulation systems can improve the high-frequency performance, but it is still not ideal low-frequency region. actuator of active system adjust stiffness and damping real time, with strong adaptability adjustability. Therefore, this paper, actuators feedback control strategy are applied to a performance water-filled acoustic cavity system. theor...

The improvement of a conventional Gyrator-C active inductor consisting of common-emitter configured and common-collector configured with resistance feedback is presented. The fixed passive resistor is replaced with tunable active resistor (TAR) to enhance the adjustability of the active inductor. Multi-regulated Cascode (MRC) circuit is applied to boost quality factor Q. Compared with the conve...

SUMMARY Minimally invasive rejuvenation procedures are increasingly popular with patients. In the midface, these might involve the introduction of sutures to lift and secure the malar tissue, fat grafts, and fillers to increase volume. This article describes a new facial contouring and support system, which uses an innovative hollow, double-beveled needle to which a 2/0 polypropylene suture may...

In the paper, aimed at the shortcoming of trust region method, we proposed a algorithm using negative curvature direction as its searching direction. The convergence of the algorithm was given. Furthermore, combing trust region method and curve-linear searching techniques, a trust region algorithm, using general curvelinear searching direction, was proposed. We proved its efficiency and feasibi...

Eukaryotic adaptation pathways operate within wide-ranging environmental conditions without stimulus saturation. Despite numerous differences in the adaptation mechanisms employed by bacteria and eukaryotes, all require energy consumption. Here, we present two minimal models showing that expenditure of energy by the cell is not essential for adaptation. Both models share important features with...