摘要:
A photoacoustic analyzer comprises an analyzing cell having a beam entrance window and including a cylindrical piezoelectric transducer element forming at least a part of the wall thereof, and a laser beam emitter emitting a laser beam directed toward and into the analyzing cell through the beam entrance window. In the photoacoustic analyzer, the ratio r/r.sub.o between the radius r of the inner side of the analyzing cell and the radius r.sub.o of the incident laser beam is selected to lie within the range of 1.ltoreq.r/r.sub.o .ltoreq.8.
摘要翻译:光声分析仪包括具有光束入口窗口的分析单元,并且包括形成其壁的至少一部分的圆柱形压电换能器元件和激光束发射器,其通过光束入口窗口发射朝向分析单元的激光束 。 在光声分析仪中,选择分析单元的内侧的半径r与入射激光束的半径r之间的比r / ro在1 / r /ro≤8的范围内 。
摘要:
A multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) transceiving system is provided, in which an MIMO-OFDM receiver feeds back ordering information, such as the order of power intensities of reception signals of a plurality of reception antennas, to an MIMO-OFDM transmitter. The MIMO-OFDM transmitter arranges subcarriers, to which data symbols have been allocated, so that the subcarriers respectively correspond to a plurality of transmission antennas, according to the fed-back information. Thus, a specific substream can be transmitted via a transmission antenna having the greatest channel gain. Consequently, the probability of properly recovering the specific substream is greatly increased.
摘要:
Provided are a radio transmission apparatus and method, a radio receiving apparatus and method, a transmitting and receiving method, and a recording medium for use in a mobile communication system according to an Orthogonal Frequency Division Multiplexing-Code Division Multiplexing (OFDM-CDM)-based transmission diversity method. The radio transmitter codes transmission data into a plurality of time-space codes, generates spread signals by respectively mapping a plurality of spread codes and the time-space codes, and transmits the spread signals via a plurality of transmission antennae, each of the spread codes containing a combination of codes whose signs are alternately equal and opposite in units of specific spreading lengths. Accordingly, it is possible to transmit data without a feedback of control information from a radio receiver.
摘要:
A battery pack employing a charge control device of the present invention includes a charge detection circuit for checking whether a secondary cell is in a charged state or not based on at least a charge voltage or a charge current of the secondary cell, a control circuit for controlling feeding of electric power to the secondary cell according to an output of the charge detection circuit, and a setting circuit for setting a level of the charge voltage or the charge current at which the charge detection circuit recognizes the charged state according to control information fed in directly from outside.
摘要:
This invention relates to an apparatus for measuring the radioactive concentration of a radioactive material-containing liquid. In order to improve the measuring sensitivity of and miniaturize the apparatus, it includes a vertically-disposed outer cylinder, an inner cylinder disposed in and concentrically with the outer cylinder, a radiation detector disposed in the inner cylinder, a radioactive liquid feed means for supplying a radioactive material-containing liquid in the form of an annular current into an annular space between the inner and outer cylinders, a first cleaning water feed means for supplying a cleaning liquid along the inner surface of the outer cylinder, and a second cleaning water feed means for supplying a cleaning liquid along the outer surface of the inner cylinder. The cleaning water prevents the radioactive material from being deposited on the inner surface of the outer cylinder and the outer surface of the inner cylinder, and the measuring sensitivity of the apparatus from decreasing.
摘要:
The present invention is provided with a wireless transceiver and wireless transmitting/receiving method and program thereof capable of improving the robustness against Doppler frequency by containing transmit diversity signals in one spreading region. In the present invention, the transmitter encodes the transmit signals using a space-time matrix and transmits the encoded space-time signals after being spread with different spreading codes, and the receiver de-spreads the received spread signals, in unit of time slot, with the spreading codes corresponding to the respective time slots and then decodes the de-spread signals using the space-time matrix.
摘要:
A temperature protection circuit comprises means adapted to compare the temperature being monitored with each of threshold temperatures and judging that the temperature being monitored reaches a threshold temperature when the temperature being monitored is maintained at the threshold temperature or more for a predetermined confirmation period, means adapted to set a longer confirmation period as the threshold temperature compared with the temperature being monitored is lower, means adapted to generate one of corresponding temperature protection signals (Sarm, Slmt, Stsd1, Stsd2) according to the judgment of which threshold temperature the temperature being monitored reaches. With this constitution, temperature protection operation can be preformed with high accuracy and high safety without unnecessarily narrowing the range of the operating temperature of an IC to be protected.
摘要:
A battery pack employing a charge control device of the present invention includes a charge detection circuit for checking whether a secondary cell is in a charged state or not based on at least a charge voltage or a charge current of the secondary cell, a control circuit for controlling feeding of electric power to the secondary cell according to an output of the charge detection circuit, and a setting circuit for setting a level of the charge voltage or the charge current at which the charge detection circuit recognizes the charged state according to control information fed in directly from outside.
摘要:
A microscope capable of being shaped into a beam with complete hollow shape by removing the disorder of the wavefront to the erase light, particularly, and capable of improving the spatial resolution by inducing a super-resolution near the limit, is provided. In the microscope, wherein a first light to excite a molecule from a ground-state to first electron excited state or a second light to excite the molecule from the first electron excited state to the second electron excited state with higher energy level, for a sample 56 including the molecule with three electronic states including at least a ground-state, are spatial phase-modulated into the prescribed beam shape, and parts of these first light and the second light are overlapped and focused to detect luminescence from the sample 56, a wavefront compensation means 61 is provided in the optical path of the first light and/or in the optical path of the second light, and the wavefront aberration caused in the first light and/or in the second light, is removed by the wavefront compensation means 61.
摘要:
A high-accuracy multi-wavelength optical microscope for providing a satisfactory contrast of image and much information about a sample. The microscope includes a plurality of light sources, a wavelength varietor independently varying the wavelength of the individual light sources, and polarization plane rotators on the optical path for each light source.