摘要:
A power supply having an input and an output, includes a power converter coupled between the input and output of the power supply including at least one switch that is controlled by comparing a sensed voltage, the sensed voltage corresponding to a current flowing through the switch, to a reference voltage. A controller, in response to a change detected in a switching frequency of the switch, reduces audible noise generated by the power supply by at least one of: adjusting the reference voltage; adjusting the current sense voltage; or adjusting a resistance used to generate the sensed voltage.
摘要:
The present invention relates to a power supply apparatus having a passive heat-dissipating mechanism. The power supply apparatus includes an insulating housing, a printed circuit board and at least an electronic component. The insulating housing has a closed receptacle therein and includes a first edge, a second edge and a third edge. The first edge is greater than the second edge and the second edge is greater than or equal to the third edge. An aspect ratio of the first edge to the second edge is greater than 2.5. The electronic component is mounted on the printed circuit board.
摘要:
A single-stage input-current-shaping (S2ICS) flyback converter achieves substantially reduced conduction losses in the primary side of the S2ICS flyback converter by connecting a bypass diode between the positive terminal of a full-bridge rectifier and the positive terminal of an energy-storage capacitor. An effective current interleaving between an energy-storage inductor and the bypass diode is thus obtained in the S2ICS flyback converter around the peak of the rectified line voltage, resulting in a significantly reduced input-current ripple and reduced current stress on the switch. Further, by rearranging the rectifiers in the ICS part of the S2ICS flyback converter in such a way that the energy-storage capacitor and the ICS inductor are connected to the ac line voltage through only two rectifiers, one diode forward-voltage drop is eliminated, which results in a substantially reduced conduction loss in the primary-side rectifiers.
摘要:
A specialized configuration of a framework connection set is provided, which is capable of assembling and disassembling frameworks easily. The framework connection set includes a retainer and a retaining clamp. The retaining clamp is moved forward or backward onto the groove of the retainer so as to modulate the space between the retaining clamp and a retainer top section. The retaining clamp and the retainer top section grasp the flange of the ledger. By doing so, the frameworks are firmly connected by the retainer and the retaining clamp. On the other hand, when the retaining clamp is removed, the ledger flange loses contact with the retainer top section. Therefore, the frameworks are disassembled.
摘要:
A new and improved AC-to-DC adapter for providing DC input to a portable computer which is operable with a removable rechargeable battery is disclosed in this invention. The adapter is enclosed in an adapter box which is formed with a shape identical to the rechargeable battery. The adapter can therefore be fitted into the pocket made for the rechargeable battery to replace the rechargeable battery when AC power source is available.
摘要:
A sole massaging device is set forth including three support members, a plurality of massaging rollers attached to the support members, and a locating frame for placing the structure in position. The support members are respectively provided with a plurality of holes into which opposite ends of shafts for the massaging rollers are fixed, and the massaging rollers are arranged in a wavelike pattern between the support members. Three horizontal shafts securely connect the support members by way of a plurality of fastening screws. The locating frame is movably fastened to the underside of the support members and can be folded or unfolded in position. An anti-skidding pad for stabilizing the device during operation is provided respectively on front and rear ends of the underside of the device. A plurality of massaging protuberances are provided on the massaging rollers for stimulating parts of a human body, especially the feet and hands.
摘要:
An antigen presenting composition comprising a plurality of 2-component MHC class I complexes and a carrier is described. A method for activating a group of antigen-specific CD8+ T cells comprising incubation of a group of naïve CD8+ T cells with the antigen presenting composition is also presented. A method for inducing the proliferation of a group of antigen-specific CD8+ T cells comprising incubation of a group of naïve CD8+ T cells with the antigen presenting composition is further described.
摘要:
An ultrasonic imaging technique for differentiating the distribution of scatterers within a tissue comprises a correcting and an imaging procedure. The correcting procedure includes steps of obtaining ultrasonic backscattered signals from a standard phantom, compensating and demodulating the signals into an envelope image, calculating the parameter m and m, selecting a window to calculate parameter mw in each location of the envelope image and mw, if mw≠ m then increase the size of the window to repeat the steps above, and when mw= m, it is the optimal size of the window. The imaging procedure includes steps of obtaining ultrasonic backscattered signals from a target tissue, compensating and demodulating the signals into an envelope image, calculating mw in each location to form a mw matrix, and presenting the matrix by utilizing pseudocolors.
摘要翻译:用于区分组织内散射体分布的超声成像技术包括校正和成像过程。 校正过程包括从标准体模获取超声后向散射信号,补偿和解调信号到包络图像中的步骤,计算参数m和 m,选择窗口以计算参数m < w SUB>,并且 m SUB>,如果 m SUB> > m然后增加窗口的大小以重复上述步骤,当 m SUB> = m,它是窗口的最佳大小。 成像过程包括以下步骤:从目标组织获得超声后向散射信号,将信号补偿和解调为包络图像,在每个位置计算m≠W以形成矩阵 ,并通过利用假胶体呈现矩阵。
摘要:
A column type fuel cell is provided, including a column electrode, a first catalytic layer, one or more channels, an electrolyte layer, a second catalytic layer, and a ring electrode. The surrounding surface of the column electrode has several protruding blocks. The first catalytic layer is on the surrounding surface of the column electrode to form a pillar, and is connected to the protruding blocks to form the channel passing through two ends of the pillar. The first catalytic layer is covered with the electrolyte layer, the electrolyte layer is covered with the second catalytic layer, and the second catalytic layer is covered with the ring electrode.
摘要:
Provided in the present invention are recombinant peptides and a method for using the peptides in stimulating an immune response against human high molecular weight-melanoma associated antigen (HMW-MAA). The peptides were designed from the identification of regions of structural and amino acid sequence homology between HMW-MAA and the mouse anti-idiotypic monoclonal antibody MK2-23. The method comprises the step of administering to an individual a peptide of the invention in an amount effective to elicit an immune response against HMW-MAA.