Abstract: A method of simulating wind field of extreme arid region based on WRF includes following steps. A mode parameter optimization scheme for wind energy simulation is selected, wherein the mode parameter optimization scheme is selected by selecting a group of mode parameter optimization schemes of different ground floors, land process, and planet boundary layers having great influence on simulation of the boundary layer of wind field, and comparing the mode parameter optimization schemes. A wind energy simulation of the extreme arid region is performed during a preset length of time using the selected mode parameter optimization scheme. Simulation configuration of the wind field for the extreme arid region is obtained through results of the wind energy simulation.

Abstract: A method of predicating ultra-short-term wind power based on self-learning composite data source includes following steps. Model parameters of an autoregression moving average model are obtained by inputting data. A predication result is obtained by inputting data required by wind power predication into the autoregression moving average model. A post-evaluation is performed to the predication result by analyzing error between the predication result and measured values, and performing model order determination and model parameters estimation again while the error is greater than an allowable maximum error.

Abstract: A method of displaying the 3D image of a product using an electronic device capable of capturing and displaying images comprises a code capturing step, an image procuring step, and an image displaying step. During the code capturing step, an information code on a printed media carrying the information of a product is captured. During the image procuring step, the information code is decoded for the information of the product and a 3D image of the product is retrieved from a remote location via a data transmission network. During the image displaying step, the 3D image of the product is displayed against a background, the background being a live image captured in real time or a static image retrieved from a previously saved file.

Abstract: A data conversion system comprises a storage device for storing a user accessible digital data, and a conversion device for converting the user-accessible digital data into a 3D data object in a 3D environment. The 3D data object is capable of being created or modified by a user in the 3D environment; and a change made in the 3D data object by the user in the 3D environment is capable of being saved as the user-accessible digital data in the non-3D environment, the user-accessible digital data being capable of being further modified by the user in the non-3D environment.

Abstract: An optical return loss detecting device is provided for measuring the optical return loss (ORL) of a device under test (DUT). The detecting device comprises a light source, an optical isolator connected to the light source for preventing reflected light by the DUT entering the light source, a first optical coupler connected to the isolator, a second optical coupler connected to the first coupler and the DUT respectively, and a module communicating with the second coupler for performing test and calculation functions thereof.

Abstract: A dust meter includes a duct member having a lower portion formed with an air inlet, and an upper portion formed with an air outlet, and confining an air passage. A heating element is used to heat air in the air passage to result in air flow from the air inlet to the air outlet. A light emitter is operable so as to generate a light beam in the air passage. An optical sensor module includes a light sensor responsive to changes in optical flux in the air passage attributed to dust content of the air that flows from the air inlet to the air outlet. The sensor module generates an electrical signal that varies with the optical flux detected by the light sensor. A processing circuit determines an actual ambient dust concentration by referring the electrical signal from the sensor module to pre-established data in the processing circuit.

Abstract: An optical power meter including a photodiode and an amplifier circuit is provided. The photodiode is for generating a current based on the power of a light beam incidents thereon. The amplifier circuit is for converting the current into a voltage and includes an amplifier, a capacitor, a plurality of resistors and a relay. The amplifier includes an inverting input terminal and an output terminal. The capacitor has a first terminal connected with the inverting input terminal and a second terminal connected with the output terminal. Each of the plurality of resistors has a first terminal connected with the inverting input terminal. The relay has a first terminal connected with the output terminal. The relay selectively connects one of the resistors with the output terminal so that the value of the voltage outputted by the output terminal is within a predetermined range. The on-resistance of the relay is not larger than 10 ?.

Abstract: An optical return loss detecting device is provided for measuring the optical return loss (ORL) of a device under test (DUT). The detecting device comprises a light source, an optical isolator connected to the light source for preventing reflected light by the DUT entering the light source, a first optical coupler connected to the isolator, a second optical coupler connected to the first coupler and the DUT respectively, and a module communicating with the second coupler for performing test and calculation functions thereof.