摘要:
One or more capacitive actuators are controlled by a device that charges the actuators via a capacitor and from a switched mode power supply SMPS that operates according to the flyback converter principle. The secondary coil of the switched mode power supply functions as the charging coil and the discharging coil, i.e., it simultaneously undertakes the function of the large, heavy charging coil. This saves space and weight.
摘要:
A process for selective graphic representation and/or evaluation of the Doppler spectrum of objects limitedly resistant to sonic intensity, for example biological organs and tissues, by an ultrasonic process wherein a material is introduced in the examination area to be acoustically irradiated, nonlinear oscillations are produced in the examination area by irradiated ultrasonic waves and the signal is evaluated by an ultrasonic converter. Also, a circuit for carrying out the above process is disclosed.
摘要:
In the exemplary embodiments, the sound signals are converted into electrical signals, which are wirelessly transmitted to an implanted receiver, and from the latter, electric stimuli in electrode channels are brought to act on the auditory nerve. The transmission proceeds in the time division multiplex technique in such a manner that the electrical signals are subjected to a pulse modulation and are transmitted in an HF-channel. Thus, the receiver can be reduced with regard to the volume of its construction as well as with regard to its energy requirement. The disclosed method and hearing prostheses for its realization are particularly suited for attending to the needs of the extremely hard of hearing.
摘要:
An X-ray tube includes a vacuum-filled housing and an anode contained in the vacuum-filled housing. The anode is operable to produce an X-ray beam based on electrons emitted from a cathode and attracted by a high voltage applied to the anode. The X-ray tube also includes a high-voltage power line introduced from an external side of the housing for supplying the anode with a high-voltage potential. The X-ray tube includes an electrical feed for electrically insulating the high-voltage power line from the housing. The electrical feed in the X-ray tube includes at least two insulating layers radially between the high-voltage power line and the housing. The at least two insulating layers are separated from one another by a metallic coating.
摘要:
A ceramic material having the general formula (BiXNayM zLuM V w) (Ti1-sZs)03, where: M comprises at least one element of main group 1, M comprises at least one element of main group 2, L comprises at least one element of the lanthanides, V is a vacancy and Z is selected from among Zr, Hf and combinations thereof, is provided. Furthermore, a piezoelectric actuator comprising the ceramic material and a process for producing the ceramic material are provided.
摘要翻译:具有通式(BiXNayM 1 zLuM 2 V V w)(Ti 1-s Z s)O 3)的陶瓷材料,其中:M 1包含主族1的至少一个元素,M 2包括 主要组2的至少一个元素,L包含至少一种镧系元素,V是空位,Z选自Zr,Hf及其组合。 此外,提供了包括陶瓷材料的压电致动器和用于制造陶瓷材料的方法。
摘要:
A capacitor includes a first heating element and a first capacitor region. The first capacitor region includes dielectric layers and internal electrodes. The internal electrodes are arranged between the dielectric layers. The first heating element and the first capacitor region are connected to each other in a thermally conductive manner.
摘要:
This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof by a polycondensation reaction using at least one acid catalyst, wherein the temperature of the reaction is controlled such that the average temperature during the first half of the reaction is higher than the average temperature during the second half of the reaction.
摘要:
This invention relates to an improved cake-filtration solid-liquid separation process wherein the improvement comprises simultaneously subjecting the solid-liquid mixture to a homogeneous magnetic field, a magnetic field gradient or both and cake-filtration to accomplish separation.
摘要:
Method for the chromatographic separation of compounds of the formula (I), in which R1, R2, R3, R4, R5, R6 have the meanings indicated in claim 1, and acid-addition salts thereof, characterised in that the separation is carried out on a chiral ion-exchanger material.
摘要:
The present invention relates to a transdermal therapeutic system for the controllable release of an active ingredient, particularly a substance promoting wound healing, to a chronic wound or for chemotherapy, with at least one waveguide, wherein the active ingredient is deposited on the waveguide via a bond that is cleavable by electromagnetic pulses in the waveguide.