Abstract: An apparatus for current estimation of a DC/DC converter includes a current sensing unit, a signal sampling unit, and a current estimator. The current sensing unit is for sensing a current passing through a switch of the DC/DC converter and converting the current into a voltage signal. The signal sampling unit, coupled to the current sensing unit, is for sampling the voltage signal so as to output a sampled signal. The current estimator, coupled to the signal sampling unit, is for determining a signal indicating estimated magnitude of an inductor current of the DC/DC converter, based on the sampled signal, a scale factor of the current sensing unit, a duty ratio of a driving signal for controlling the switch, an input voltage and an output voltage of the DC/DC converter. An apparatus for current estimation that can further control an averaged current of a DC/DC converter.

Abstract: A phase-locked loop method for use in utility electricity parallel-connection system is introduced. The phase-locked loop method comprises a conversion signal generating step, an error calculating step, a frequency correction signal obtaining step, an angle signal obtaining step, and a synchronous signal generating step to not only calculate an error value by detecting a utility electricity voltage, but also reduce or return-to-zero the error value by proportional integral adjustment. With the steps, the phase-locked loop method achieves synchrony precisely by eliminating input utility electricity voltage distortion and frequency variation. Furthermore, the phase-locked loop method advantageously features quick response and a wide frequency range and therefore is effective in tracking power generation facilities, such as a diesel generator, and expanding inverters.

Abstract: A phase-locked loop method for use in utility electricity parallel-connection system is introduced. The phase-locked loop method comprises a conversion signal generating step, an error calculating step, a frequency correction signal obtaining step, an angle signal obtaining step, and a synchronous signal generating step to not only calculate an error value by detecting a utility electricity voltage, but also reduce or return-to-zero the error value by proportional integral adjustment. With the steps, the phase-locked loop method achieves synchrony precisely by eliminating input utility electricity voltage distortion and frequency variation. Furthermore, the phase-locked loop method advantageously features quick response and a wide frequency range and therefore is effective in tracking power generation facilities, such as a diesel generator, and expanding inverters.

Abstract: A single-phase bridgeless insulated power factor adjustment circuit includes an EMI filter module, low-frequency switching diode module, two switches and two insulated voltage transformation modules. The EMI filter module is coupled to an AC power. The low-frequency switching diode module is coupled to the EMI filter module. The two switches are coupled to the low-frequency switching diode module. The two insulated voltage transformation modules are coupled to one of the two switches. With the low-frequency switching diode module being in first ON state, one of the two switches turns on, and one of the two insulated voltage transformation modules turns on. With the low-frequency switching diode module being in second ON state, the other switch turns on, and the other insulated voltage transformation module turns on. Hence, the circuit is unlikely to fail, but features simple circuitry, incurs low costs, be compact, and achieves high conversion efficiency.

Abstract: A single-phase bridgeless insulated power factor adjustment circuit includes an EMI filter module, low-frequency switching diode module, two switches and two insulated voltage transformation modules. The EMI filter module is coupled to an AC power. The low-frequency switching diode module is coupled to the EMI filter module. The two switches are coupled to the low-frequency switching diode module. The two insulated voltage transformation modules are coupled to one of the two switches. With the low-frequency switching diode module being in first ON state, one of the two switches turns on, and one of the two insulated voltage transformation modules turns on. With the low-frequency switching diode module being in second ON state, the other switch turns on, and the other insulated voltage transformation module turns on. Hence, the circuit is unlikely to fail, but features simple circuitry, incurs low costs, be compact, and achieves high conversion efficiency.

Abstract: A wearable physiological measuring device has a torso-worn module and a limb-worn module configured to communicate in a wireless way with each other. The torso-worn module is configured to be coupled with a torso of a user to obtain an R-peak from an electrocardiac signal. The limb-worn module is configured to be coupled with at least one limb of four limbs of the user to obtain a pulse wave peak from a plethysmograph signal. There are no physical connections (neither wire nor cable) between the torso-worn module and the limb-worn module. The wearable physiological measuring device is configured to use the R-peak time and the pulse wave peak time to generate a pulse transit time data.

Abstract: A power factor correction conversion device and control method thereof are adapted to send an AC signal to a power factor correction conversion device, convert the AC signal into a DC signal, and perform power factor correction of the DC signal, so as to change a power factor sent to a back-end load, wherein the control method includes a rectification step, a feedback step, a ripple calculating step, a ripple offsetting step, a logical computation step, a pulse width modulation step and a power factor correcting step. Hence, the second-order ripple component in a feedback signal is eliminated to thereby increase the response speed of the power factor correction conversion device and reduce the distortion rate of the current, thus increasing the power factor sent to the back-end load.

Abstract: A power factor correction conversion device and control method thereof are adapted to send an AC signal to a power factor correction conversion device, convert the AC signal into a DC signal, and perform power factor correction of the DC signal, so as to change a power factor sent to a back-end load, wherein the control method includes a rectification step, a feedback step, a ripple calculating step, a ripple offsetting step, a logical computation step, a pulse width modulation step and a power factor correcting step. Hence, the second-order ripple component in a feedback signal is eliminated to thereby increase the response speed of the power factor correction conversion device and reduce the distortion rate of the current, thus increasing the power factor sent to the back-end load.

Abstract: A control method for reducing second-order ripple is adapted to reduce second-order ripple on an input side of a DC-DC conversion device, wherein the input side of the DC-DC conversion device is coupled to a preceding voltage supply device, and an output side of the DC-DC conversion device is coupled to a DC-AC transforming device, characterized in that a voltage control device for controlling the preceding voltage supply device is designed according to a transfer function, and the transfer function is adjusted and controlled with an output voltage of the DC-DC conversion device and an amplitude voltage of pulse width modulation to reduce second-order ripple of an input voltage input to the input side of the DC-DC conversion device, thereby dispensing the need to increase circuits or increase capacitance of components and cutting costs.

Abstract: An electrode device has a conductive body, a silver layer situated above the conductive body, a silver compound layer situated above the silver layer, a liquid absorbing and releasing element situated above the silver compound layer, a shielding element configured to cover an upper surface and a portion of a side surface of the liquid absorbing and releasing element, and a moving mechanism configured to move the shielding element reciprocally between at least two positions.

Abstract: A mixed power supply device includes a power supply component for providing a DC voltage; a DC-DC conversion module coupled to the power supply component to receive the DC voltage and output a stable DC voltage; a current transformation module coupled between the DC-DC conversion module and a load to receive the stable DC voltage and convert the stable DC voltage into an AC voltage; and a merging network switching switch coupled to the current transformation module to connect the current transformation module and a utility power network in parallel or disconnect the current transformation module from the utility power network, allowing a load to receive merging network mode-based power supply or standalone mode-based power supply, wherein, in the merging network mode, the current transformation module performs unbalanced current compensation on load unbalance of the load.

Abstract: A photocatalytic reactor is disclosed herein, which includes a rotatable light guide plate and a light source. The light guide plate is coated with a photocatalyst film on a surface thereof. A light beam emitted from the light source can be coupled into and propagate inside the light guide plate to activate the photocatalysis of the photocatalyst film. Additionally, the rotation of the light guide plate further expedites the photocatalysis so as to enhance the reaction efficiency of the photocatalytic reactor.

Abstract: An optical fiber photocatalytic reactor is provided. The reactor comprises a reaction zone and multiple fibers located in the reaction zone. The fiber comprises a photocatalyst that is coated onto its surface via a thermal hydrolysis method. The adhesion between the fiber and the photocatalyst thereon is strong, and thus, the delamination of the photocatalyst film on the fiber can be prevented. Moreover, the optical fiber photocatalytic reactor is useful for the decomposition of nitrogen oxide which is one of air's most harmful contaminants. The present invention exhibits a high conversion of nitrogen oxide.

Abstract: A photocatalytic reactor is disclosed herein, which includes a rotatable light guide plate and a light source. The light guide plate is coated with a photocatalyst film on a surface thereof. A light beam emitted from the light source can be coupled into and propagate inside the light guide plate to activate the photocatalysis of the photocatalyst film. Additionally, the rotation of the light guide plate further expedites the photocatalysis so as to enhance the reaction efficiency of the photocatalytic reactor.

Abstract: The invention provides a novel microorganism Pseudonocardia sp. RMRC PAH4 characterized in that it is able to degrade high concentration of quinoline by enrichment culture, shows a high tolerance to compactin-sodium and possesses a high hydroxylation activity of converting compactin-sodium to pravastatin-sodium. The invention relates also a process for converting compactin-sodium into pravastatin-sodium by fermenting said novel microorganism Pseudonocardia sp. RMRC PAH4. Pravastain-sodium is a potent cholesterol-lowering agent used in treatment for hypercholesterolemia.

Abstract: A process for purifying and preparing highly pure acarbose from acarbose-containing fermentation broth. The acarbose is purified through steps of alcohol precipitation, a strongly acidic cation exchanger chromatography and an immobolized enzyme affinity chromatography. Acarbose is generally applied in treating diabetes.

Abstract: The invention provides a novel microorganism Pseudonocardia sp. RMRC PAH4 characterized in that it is able to degrade high concentration of quinoline by enrichment culture, shows a high tolerance to compactin-sodium and possesses a high hydroxylation activity of converting compactin-sodium to pravastatin-sodium. The invention relates also a process for converting compactin-sodium into pravastatin-sodium by fermenting said novel microorganism Pseudonocardia sp. RMRC PAH4. Pravastain-sodium is a potent cholesterol-lowering agent used in treatment for hypercholesterolemia.

Abstract: A purification process for manufacturing a high pure acarbose relates to a process for preparing high pure acarbose from acarbose-containing fermentation broth. The acarbose was purified through steps of alcohol precipitation, a strongly acidic cation exchanger chromatography and an immobilized enzyme affinity chromatography. Acarbose is generally applied in treating diabetes.

Abstract: A method of manufacturing a photo-catalyst including titanium dioxide and silicon dioxide is provided, wherein titanium dioxide is synthesized by a collosol gelatinization utilizing the water generated by the esterification of acid and alcohol to conduct a reaction of hydrolysis condensation. The silicon dioxide is synthesized by a collosol gelatinization by adding Si(OC2H5)4, n-C4H9OH and water or Si(OC2H5)4, (CH3)Si(OC2H5)3 and water.

Abstract: A noble metal catalyst supported on boron nitride (BN) is used for the deep oxidation of organic compounds. The superior activity of the catalyst provides an extreme low light-off temperature and a short induction period at the deep oxidation reaction of organic compounds in air stream. The catalyst outperforms the traditional oxide-supported Pt catalysts with respect to the life and activity. The specific surface area of BN ranges from 1 to 100 m2/g, and the loading of the noble metal is in the range of 0.1 to 5.0 wt %. The noble metal can be selected from a group consisting of platinum (Pt), palladium (Pd), rhodium (Rh), Ruthenium (Ru) and a mixture thereof.