Abstract: Systems and methods for reducing auxiliary transformer winding turns are disclosed. In one aspect, a circuit includes a transformer having a primary winding, a secondary winding and an auxiliary winding having a first end and a second end, a diode having a cathode and an anode, the anode coupled to the first end of the auxiliary winding, and a capacitor having a first terminal coupled to the second end of the auxiliary winding, and a second terminal coupled to the cathode.

Abstract: Among other things, there are disclosed embodiments of belts or bands that can be used in treatments for tricuspid valve regurgitation. In some embodiments, such belts may be heat-set in a particular configuration to effectively decrease tricuspid annulus when deployed around the atrioventricular groove. Embodiments include one or more tensioning sutures for applying cinching or tightening to belts when deployed, and structure for effectively distributing force during such tightening. Embodiments of tensioning members, protective members, and devices and methods for open-surgical placement (e.g. around a heart for annuloplasty) are also disclosed.

Abstract: A flyback DC-DC converter. The converter having a transformer with a primary and a secondary windings, first and second switches, a capacitor coupled between the second switch and the primary winding, where the second switch is arranged to operate such that a sum of a first and second time periods equals a sum of third and fourth time periods, where the first time period is a delay time period from a time that the first switch is turned off to a time that the second switch is turned on, the second time period is a time period that the second switch is on, the third time period is a resonance time period of a resonator formed by a leakage inductance of the transformer and a capacitance of the capacitor, and the fourth time period is a time period for discharge of the leakage inductance of the transformer into the capacitor.

Abstract: Among other things, there are disclosed embodiments of belts or bands that can be used in treatments for tricuspid valve regurgitation. In some embodiments, such belts may be heat-set in a particular configuration to effectively decrease tricuspid annulus when deployed around the atrioventricular groove. Embodiments include one or more tensioning sutures for applying cinching or tightening to belts when deployed, and structure for effectively distributing force during such tightening. Embodiments of tensioning members, protective members, and devices and methods for open-surgical placement (e.g. around a heart for annuloplasty) are also disclosed.

Abstract: Some contrast injection systems use relatively-large inner diameter tubing to inject contrast fluid into a patient. The contrast injection system of the embodiments presented herein takes advantage of the elastic properties of tubing to “pre-stress” smaller inner diameter tubing into larger inner diameter tubing prior to injecting contrast into the patient. As such, the contrast injection system of these embodiments can reduce the risk of system-pressure-limit-induced injection interruption, improve maximum flow rate, and reduce the use of plastics.

Abstract: A multilayer film measuring device, which comprises in sequence: a measuring module, a multilayer film to be measured, and a circular polarization module. When the measuring module can generate a laser beam through the circular polarization module to the multilayer film to be measured, a reflective polarizer of the multilayer film to be measured completely reflects the laser beam through the circular polarization module to the receiving module, and the laser beam shifted by a surface of a first waveplate of the multilayer film to be measured is absorbed by a second linear polarizer of the circular polarization module, so that the multilayer film can be measured accurately.

Abstract: The present invention provides a buckling-restrained brace out-of-plane stability design method considering a bidirectional seismic action.

Abstract: A converter bottom blowing system comprises a first gas source connected in parallel with a lime powder silo, a lime powder blowing tank and a first injector, where a first cut-off valve is arranged between the lime powder blowing tank and the first injector; a second gas source connected in parallel with the biochar powder silo, the biochar powder blowing tank and the second injector, where a second cut-off valve is arranged between the biochar powder blowing tank and the second injector; a converter, where a plurality of bottom blowing lances are arrayed at a bottom of a converter, the bottom blowing lances are connected with the first injector and the second injector through a three-way valve, a third cut-off valve is arranged between the first injector and the three-way valve, and a fourth cut-off valve is arranged between the second injector and the three-way valve.

Abstract: Among other things, there are disclosed embodiments of devices used for minimally-invasive treatments, such as treatment of mitral valves. In a system for placing an annuloplasty belt around the heart, embodiments for tensioning a suture associated with the belt are provided, as are embodiments of a suture lock for holding the suture with the applied tension. A delivery device that permits placement and tensioning of such a belt and activation of the suture lock in one procedure is also disclosed. Methods for making and using these features are also disclosed.

Abstract: Disclosed is an active optical cable comprising an optical cable; optical modules, arranged at each of two ends of the optical cable and optically coupled with the optical cable, at least one of which is detachably connected with the optical cable; a first connecting terminal connected to one end of the optical cable and optically coupled with the optical cable; a second connecting terminal connected to the optical module and optically coupled with the optical module, the first connecting terminal and the second connecting terminal being optically coupled; and a connecting sleeve which is connected between the optical cable and the second connecting terminal and keeps the first connecting terminal and the second connecting terminal in an optical coupling state, wherein at least one of the optical cable and the second connecting terminal is detachably connected with the connecting sleeve.

Abstract: An audio system includes a speaker having a transducer, where the speaker is positioned within an enclosure that forms a front volume and a rear volume on opposite sides of the transducer. The rear part of the enclosure defining the rear volume is formed of an acoustic metamaterial that defines a plurality of channels within the rear volume, where the number and dimensions of the channels is configured to virtual increase the rear volume to amplify a bass portion of sound produced by the speaker. In addition, the channels may be configured to match an impedance of the front volume to serve as an absorber for high frequency audio.

Abstract: The disclosure provides a vibrating wire compressive stress gauge and stress testing equipment suitable for use in low-temperature environments. By providing a stress trigger sleeve made of elastic material, the concrete structure of the lining itself expands when it is affected by high or low temperatures, extruding the stress trigger sleeve, and the extrusion force is offset through the elastic force of the elastic material, thereby preventing the expansion force from being transmitted to the vibrating wire assembly to generate stress signals that are caused by the self-expansion of the lining structure, which may cause measurement error. Specifically, the vibrating wire assembly is provided in the vibrating wire measurement space composed of a stress trigger sleeve and a pair of anchoring disks. When the lining is subjected to external stress, a certain internal force will be generated.

Abstract: A converter bottom blowing system comprises a first gas source connected in parallel with a lime powder silo, a lime powder blowing tank and a first injector, where a first cut-off valve is arranged between the lime powder blowing tank and the first injector; a second gas source connected in parallel with the biochar powder silo, the biochar powder blowing tank and the second injector, where a second cut-off valve is arranged between the biochar powder blowing tank and the second injector; a converter, where a plurality of bottom blowing lances are arrayed at a bottom of a converter, the bottom blowing lances are connected with the first injector and the second injector through a three-way valve, a third cut-off valve is arranged between the first injector and the three-way valve, and a fourth cut-off valve is arranged between the second injector and the three-way valve.

Abstract: Disclosed are an active optical cable assembly and assembling method thereof. The assembly comprises an optical fiber connector, optical port adapter, and optical transceiver sequentially connected, the latter two being pluggably connected; wherein the optical fiber connector comprises a movable kit, and a tail sleeve, an intermediate connection sleeve, and a plug connector sequentially connected; the movable kit is sleeved on the outer side of the plug connector for preventing the plug connector from detaching from the optical port adapter after inserted into the optical port adapter; a blocking member is disposed between the tail sleeve and the movable kit, and prevents the movable kit from sliding backwards. When the blocking member is removed and the movable kit is slid backwards to the intermediate connection sleeve, the plug connector is pullable out from the optical port adapter, whereby the optical transceiver is not connected to the optical cable during assembly.

Abstract: Among other things, there are disclosed embodiments of devices used for minimally-invasive treatments, such as treatment of mitral valves. In a system for placing an annuloplasty belt around the heart, embodiments for tensioning a suture associated with the belt are provided, as are embodiments of a suture lock for holding the suture with the applied tension. A delivery device that permits placement and tensioning of such a belt and activation of the suture lock in one procedure is also disclosed. Methods for making and using these features are also disclosed.

Abstract: The invention provides a reflective imaging film, including: a transparent separation layer, the transparent separation layer including a first surface and a second surface arranged opposite to each other; a microfocus element array layer, which is laminated on the first surface and at least includes three microfocus units; a reflective layer covering an outer surface of the microfocus element array layer, the microfocus element array layer and the reflective layer forming a reflective microfocus layer; and a micropattern layer, which is arranged on the second surface and at least includes three micropattern units, the micropattern units being different from each other, and the micropattern layer being obtained through projection and imaging of a partial cut of a whole virtual three-dimensional image by the reflective microfocus layer, a three-dimensional image with a continuous parallax and an occlusion relationship is observable through the transparent separation layer.

Abstract: A method of operating a circuit is disclosed. The method includes providing an interleaved power factor correction (PFC) converter circuit; determining a switching frequency of the interleaved PFC converter circuit; setting a phase shift of the interleaved PFC converter circuit at a first phase shift when the switching frequency of the interleaved PFC converter circuit is below or at a first switching frequency; setting the phase shift of the interleaved PFC converter circuit at a second phase shift when the switching frequency of the interleaved PFC converter circuit is greater than the first switching frequency but less than a second switching frequency; and setting the phase shift of the interleaved PFC converter circuit at the first phase shift when the switching frequency of interleaved the PFC converter circuit is greater than the second switching frequency.

Abstract: A cross-site scripting (XSS) risk analysis method based on a Bayesian network and a STRIDE model includes: constructing an XSS attack-related STRIDE threat model of a network information release system; obtaining a network structure of a Bayesian network-based XSS attack risk analysis model based on the STRIDE model; obtaining prior probabilities of all nodes in the network structure of the Bayesian network-based XSS attack risk analysis model based on expert experience and a node ranking algorithm; obtaining a training dataset through simulation by using a rejection sampling algorithm or a direct sampling method; performing network training on the network structure of the Bayesian network-based XSS attack risk analysis model by using the training dataset to obtain the Bayesian network-based XSS attack risk analysis model; and reasoning a Bayesian network to obtain a quantitative analysis result of an XSS attack risk of the network information release system.

Abstract: A synchronous rectifier circuit is self-powered by a portion of a secondary winding. A transformer has a primary winding arranged to receive power from a power source, a secondary winding arranged to transfer power to a load, and a tapped output arranged to transfer power to a controller circuit, wherein the tapped output is formed from a portion of the secondary windings. The controller circuit uses power from the tapped output to drive a synchronous switch disposed between the secondary winding and the load. The synchronous switch rectifies the power received from the secondary winding such that DC power can be supplied to a load.