Abstract: The present invention discloses a method for catalytic synthesis of oxygenate from alcohol. At first, a feeding material comprising at least one alcohol is provided. Next, a copper-containing catalyst is provided and the catalyst further comprises at least one metal element selected from the group consisting of the following: zinc, magnesium, and aluminum elements. Following that, a catalytic reaction of the feeding material over the copper-containing catalyst is carried out to synthesize at least one oxygenate.

Abstract: A wafer lithographic shielding mask for fabricating a multi-project wafer (MPW) and a wafer fabrication method using the same are disclosed. The mask including a light shielding layer and at least one transparent region is used to select the layout patterns of designated chips on an MPW reticle to be exposed onto the photoresist layer on the surface of the wafer. The lithography method of fabricating MPW mainly involves disposing a wafer lithographic shielding mask for selecting the exposure regions on the MPW reticle on the light transmission path from a lithographic light source to a wafer, e.g., between the MPW reticle and the lithographic light source or between the MPW reticle and the wafer, so as to prevent some undesired chips from being fabricated on the wafer using the MPW reticle, thereby decreasing the wafer production cost.

Abstract: A current-source sine-wave voltage inverter for converting a direct current (DC) voltage to an alternating (AC) voltage includes a DC source for providing a DC voltage, a current source circuit having a primary side inductance of a transformer, a clamping circuit, an inverting circuit, and a control and driving circuit. The clamping circuit includes a first switch cascaded with a first diode, a second diode cascaded with a second switch, a first capacitor connected between an anode of the first diode and a cathode of the second diode, a secondary side inductance of the transformer cascaded with a third diode, the secondary side inductance of the transformer and the third diode connected to two ends of the DC source, and a cathode of the third diode connected to an anode of the DC source. The present invention also provides a fuel cell system.

Abstract: A boost converter utilizing bi-directional magnetic energy transfer of coupling inductor provides a high efficiency boost DC-DC converting with above 30 times voltage boost rate, which uses a coupling inductor and low voltage switch to absorb circuit induction voltage of a passive regenerative snubber no matter if switch is turned on or off. Such that, a much higher voltage boost rate than the turn rate of transformer and wider range of switching duty cycle is obtained. A bi-directional magnetic energy path is utilized, that is, when switch is turned on the first winding of coupling inductor stores magnetic excited high current energy, and opposite magnetic flux is induced on the second winding at the same time. When switch is turned off the magnetic excited current continues and increases the voltage on the second winding. The second winding has bi-directional magnetic current induced and fully utilizes capacity of transformer's iron core.

Abstract: A hybrid clean-energy power-supply framework integrates a fuel cell, solar cell, and wind energy, applies a max power tracking rule, raises the output power of a solar cell and wind energy to supply a power load and transfer the surplus electrical energy to a water-electrolyzing apparatus for producing hydrogen and oxygen, and provides a fuel for a fuel cell power generating system. Furthermore, the present invention utilizes features of each clean-energy power generating system, depends on the powerful calculation capacity of a central processing unit to monitor and dispatch each power generation and supply system, and thus ensures the reliability of supply power and reduces the power generation cost. Such a framework can selectively grid-connect with the utility power or run as a stand-alone power supply system and has a mechanism for preventing the island effect.

Abstract: In this invention, a current-source sine wave voltage driving circuit via voltage-clamping and soft-switching techniques, also known as an inverter, is applied mainly to the fuel cell, solar energy, battery and un-interruptible power systems for inverting DC voltage into utility AC voltage. A controllable current source having high frequency switching capability is used for supplying output capacitors and loads with an output sine wave voltage. The current source uses the voltage-clamping technique and quasi-resonant property to control the inductance current in discontinuous conduction mode so that all loads have soft-switching characteristics and more-than-95% maximum conversion efficiency. Meanwhile, the voltage-clamping technique can reduce voltage specification requirement to be sustained by the switch devices.

Abstract: A hybrid clean-energy power-supply framework integrates a fuel cell, solar cell, and wind energy, applies a max power tracking rule, raises the output power of a solar cell and wind energy to supply a power load and transfer the surplus electrical energy to a water-electrolyzing apparatus for producing hydrogen and oxygen, and provides a fuel for a fuel cell power generating system. Furthermore, the present invention utilizes features of each clean-energy power generating system, depends on the powerful calculation capacity of a central processing unit to monitor and dispatch each power generation and supply system, and thus ensures the reliability of supply power and reduces the power generation cost. Such a framework can selectively grid-connect with the utility power or run as a stand-alone power supply system and has a mechanism for preventing the island effect.

Abstract: A wavelength to optical power converter and a method for converter a wavelength into an optical power are provided. The wavelength to optical power converter includes an input fiber pigtail for inputting an optical wavelength signal, a spiral fiber connected to the input fiber pigtail, a cylinder for fixing the spiral fiber, an output fiber pigtail extended from the spiral fiber, and an optical detector connected to the output fiber pigtail for reading a signal from the output fiber pigtail to generate the optical power, wherein the spiral fiber outputs the optical power in response to the optical wavelength signal, thereby performing a conversion from the wavelength into the optical power.

Abstract: A high accurate SOI optical waveguide Michelson interferometer sensor for temperature monitoring combines a waveguide coupler, waveguide, or splitter with two silicon-on-insulator Bragg gratings.

Abstract: A high accurate SOI optical waveguide Michelson interferometer sensor for temperature monitoring has designed and analyzed in this invention. According to the numerical analysis of power reflective spectra of waveguide Michelson interferometers, the temperature sensing of waveguide SOI Michelson interferometer sensor can improve at least 20 times than fiber Bragg grating temperature sensor. Moreover, the SOI Waveguide interferometer sensor we designed presents high sensitivity than pure single waveguide Bragg grating sensor and fiber Bragg grating sensor by adjusting the length of the two interferometric arms. The full wavelength half maximum (FWHM) of our designed SOI optical waveguide Michelson interferometer can be narrowed much smaller than fiber Bragg grating and waveguide Bragg grating sensors for sensitivity improvement. The invention of this optical SOI waveguid sensing devices shows promising results for developing integrated OEIC sensors in the future.