摘要:
Device for connection between a heart prosthesis and the natural auricles. According to the invention, the means of joining to the natural auricles are formed by individual suture attachments (11) mounted in such a may as to be free in rotation and to be movable.
摘要:
The present invention relates to a method for manufacturing a hemocompatible material comprising a synthetic substrate and animal biological tissue, according to which said animal biological tissue is dehydrated and adhered to said synthetic substrate by means of a dispersion of the material forming said synthetic substrate. According to the invention, the animal biological tissue is only dehydrated chemically by immersing said animal biological tissue in a bath consisting of a solution containing at least 80 wt % of polyethylene glycol.
摘要:
Disclosed is a method for producing a hemocompatible article. A non-thermally stabilized polytetrafluoroethylene membrane comprised of non-oriented fibers is heated to a temperature of around 400° C. and above the gel point of the polytetrafluoroethylene, while the membrane is being applied against a forming mold. The membrane is applied against the forming mold by generating a pressure differential between opposing faces of the membrane to form a conformed membrane. The conformed membrane is then cooled, thereby producing the hemocompatible article.
摘要:
A circuit for regulating a parameter by means of a bidirectional current chopper structure suitable for transferring energy from an input network to an output network via the bidirectional current chopper structure, the current flowing through the structure being in the form of a triangular wave. The circuit is particularly suitable for space applications.
摘要:
The present invention relates to a method for manufacturing a hemocompatible material comprising a synthetic substrate and animal biological tissue, according to which said animal biological tissue is dehydrated and adhered to said synthetic substrate by means of a dispersion of the material forming said synthetic substrate. According to the invention, the animal biological tissue is only dehydrated chemically by immersing said animal biological tissue in a bath consisting of a solution containing at least 80 wt % of polyethylene glycol.
摘要:
A process which forces a solar array (5) to operate permanently at its maximum power point MPP. This feature is available using a microprocessor (1) which receives permanently the amplitudes of operating point coordinates, a solar array voltage Vsa and current Lsa and its temperature T. The microprocessor (1) computes, using this data, the MPP of the solar array, whatever are the environmental conditions and ageing, and uses the MPP voltage Vmpp as the reference of a series or a shunt conventional power regulator (7) to force the solar array (5) to operate at this MPP. The MPP is computed solving one, two, or three unknown equation system, depending on the type of the power regulator managing the solar array voltage and the temperature, to get the electrical characteristics defining the power characteristics and solving the equation dP/dv=0.
摘要翻译:迫使太阳能阵列(5)在其最大功率点MPP永久运行的过程。 该特征可以使用微处理器(1),其永久地接收工作点坐标的幅度,太阳能阵列电压Vsa和电流Lsa及其温度T.微处理器(1)使用该数据计算太阳能阵列的MPP ,无论环境条件和老化情况如何,并且使用MPP电压Vmpp作为串联或分流常规功率调节器(7)的参考,以迫使太阳能阵列(5)在该MPP下操作。 根据管理太阳能阵列电压和温度的功率调节器的类型,计算MPP求解一个,两个或三个未知方程系统,以获得定义功率特性的电特性并求解方程式dP / dv = 0 。
摘要:
The invention is designed for continuous, rapid and effective monitoring of a solar or equivalent source in order successfully to arrange for it to operate at its point of maximum power (PMP) without interrupting the supply of electricity to users, with a conventional power-regulating structure of series or parallel type, governed by an independent module capable of calculating the voltage and current coordinates of said PMP (VPMP, IPMP) by applying an iterative algorithm and/or graphic methods. This module ideally requires only one measurement point, relating to the electrical characteristic, with the ambient conditions of said source, and as a result it delivers a reference signal, a continuous, stable voltage constantly representative of the evolution of the PMP, for the power regulator. In the event of the use of a power-regulating structure of S3R or ASR type, information about the PMP is immediate and requires no intermediate measurement point.
摘要:
According to the invention, the hemocompatible material comprises a strong and leaklight synthetic substrate, to which a biological tissue adheres by virtue of the constituent substance of said substrate dispersing in a solvent.
摘要:
The invention relates to a conditioning circuit that measures operating points of a power supply to deduce therefrom the current-voltage characteristic thereof and to determine directly the voltage corresponding to its maximum power point, without using any kind of tracking algorithm that causes the operating point of the power unit to oscillate about the maximum power point. The maximum power point voltage VMPP is supplied to a controller which regulates a power cell by slaving it to the input voltage until the output voltage of the supply is equal to the maximum power point voltage VMPP. The invention also relates to a solar generator and an associated conditioning method. One particular application is to high-power satellites.
摘要:
A device for connection between a heart prosthesis and a person's natural auricles includes a structure for joining to the natural auricles with individual suture attachments mounted so as to be free in rotation and movable.