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1588results about How to "The method is simple and reliable" patented technology

Band type multicontact electrode and method of making the same

A multicontact electrode array suitable for implantation in living tissue includes a distal end having multiple spaced-apart ring or band electrode contacts carried on a flexible tube carrier. Each ring electrode contact is laser welded to a respective wire tip that has a multi-helix orientation on the inside of a separation tube. The center of the multi-helix wire defines a lumen wherein a positioning stylet, or other suitable positioning tool, may be removably inserted when the electrode array is implanted. The method of making the multicontact electrode array includes, as an initial step, winding lead wires around a suitable mandrel so as to form a multi-helix configuration. (Alternatively, the wire may be purchased in a multiwire pre-wound configuration that defines a lumen, in which case the mandrel is slipped inside the lumen.) Then, at a distal end of the electrode, each wire within the multi-helix winding is unwound so as to protrude out from the winding. Next, a non-conductive separation silicone tube which has a longitudinal slit along its length, is placed around the wound wires. Ring contacts are then placed over the silicone tube at a distal end of the electrode array and spaced apart as desired. These ring contacts also have a slit therein through which the protruding wire ends may exit. The silicone tube is used as a spacer to centrally locate the multi-helix wound wires with the ring contacts. A compressive die may be used to hold the pre-assembled ring contact, multi-helix wire, separation tube in their desired positions, and may be used to close the opening or slit of each ring contact through which the wire tips protrude. The wire tips are then individually trimmed to a suitable distance. A laser welding process may then be used to bond each lead wire to a corresponding ring contact. Finally, the preassembled electrode array is placed in a molding die, and a polymer filler is injected into the internal gaps of the electrode array components.
Owner:BOSTON SCI NEUROMODULATION CORP

Magnetic noise reduction method for AC rotary electric machine, and motor control apparatus and AC rotary electric machine apparatus using the same

The invention provides techniques for reducing or altering the magnetic noise of an AC rotary electric machine. A magnetic noise reducing harmonic current of order n, whose frequency is n times the frequency of the fundamental frequency component of a polyphase AC current fed to an armature of a polyphase AC rotary electric machine, is superimposed on the polyphase AC current, thereby reducing or altering a harmonic component having a frequency (n−1) times the frequency of the fundamental frequency component and occurring due to a radial magnetic excitation force acting radially on an iron core of the AC rotary electric machine. Magnetic noise is caused by a vibration whose energy is the sum of the circumferential and radial vibrations of the iron core occurring due to the magnetomotive force of the rotor, and altering the radial vibration is particularly effective in altering the magnetic noise; as the harmonic component of the radially acting magnetic excitation force, occurring due to harmonic components having frequencies 3, 5, 7, and 13 times the fundamental frequency, has a frequency 6 or 12 times the fundamental frequency, the magnetomotive force of the rotor can be effectively reduced or altered when a current having a frequency 7 or 13 times the fundamental frequency is superimposed on the stator current.
Owner:DENSO CORP

Method for separating and extracting stem cells from placenta, umbilical cord or adipose tissue

The invention relates to a method for separating and extracting stem cells from a placenta, umbilical cord or adipose tissue, which comprises the following process steps: firstly mixing the placenta, umbilical cord or adipose tissue and a cell maintenance fluid according to the proportion by weight of 2.5-4:1, putting the mixture into a tissue crushing barrel, adding collagenase after crushing, uniformly mixing, hatching at the temperature of 37 DEG C, filtering, adding a precipitator, sucking a supernatant fluid after settling, centrifuging, removing the supernatant fluid, adding concentrated cells into a liquid of diatrizoate sodium-ficoll 400#, then centrifuging, collecting 10-15 ml of intermediate cell layer, washing with the cell maintenance fluid, counting the collected cells, and providing the cells for clinical use when the cell survival ratio is more than or equal to 95 percent. The invention not only realizes the separation and the extraction of all stem cells from the placenta, umbilical cord or adipose tissue, but also realizes industrialized production, and enables doctors to conveniently, safely and canonically obtain the adult stem cells in clinic and use the adult stem cells for treating the diseases of patients as using medicaments, thereby solving the bottleneck problem of difficult obtainment of adult stem cells in clinic and popularizing a cell treatment technology.
Owner:NINGXIA ZHONGLIANDA BIOPHYSICS

Network threat evaluation method based on multi-granularity anomaly detection

The invention relates to a network threat evaluation method based on multi-granularity anomaly detection, and can effectively solve the problem that the existing threat situation evaluation technology based on a network data packet or a network flow cannot be well suitable for rapidly and accurately identifying an attack event and perceiving a threat situation in a high-speed network environment. The network threat evaluation method comprises the following steps: analyzing a time slice including an abnormal network flow by utilizing a packet-based coarse granularity anomaly detection; performing flow reassembly of the network flow of the abnormal time slice and extracting a flow characteristic attribute through flow-based fine granularity anomaly detection, and judging the attack type by utilizing a flow characteristic anomaly detection algorithm; and finally, quantifying and evaluating the serious degree of the threat event in a current network according to the detected threat event. The method disclosed by the invention is easy to operate and can detect the serious degree of the threat event subjected by the network precisely in real time; network workers can easily know the security threat subjected by the current network in time; and effectively emergency response measures can be taken in time.
Owner:THE PLA INFORMATION ENG UNIV

Infrared photoacoustic spectroscopy detection device and method for decomposed components of sulfur hexafluoride under partial discharge

The invention relates to an infrared photoacoustic spectroscopy detection device and method for decomposed components of sulfur hexafluoride under partial discharge, belonging to the technical field of partial discharge on-line monitoring of SF6 gas insulating electrical equipment. The device of the invention mainly comprises an induction voltage regulator, a corona free experimental transformer, a partial discharge free protective resistor, a standard capacitive voltage divider, a non-inductive resistor, a GIS analog element, a wide-frequency high-speed ultrahigh-capacity digital storage oscillograph and an infrared photoacoustic spectroscopy system. In the method of the invention, infrared photoacoustic spectroscopy detection is carried out on the decomposed gas of SF6 under partial discharge in the GIS analog element by the device of the invention. The invention has high sensitivity, little gas consumption, multiple detection components and strong anti-jamming capability, can effectively detect SF6, CF4, SO2F2, SOF2, SO2, HF and the like as low as 0.01 muL/L, and is suitable for on-line detection. The invention can be widely used for detection of partial discharge decomposed gas of SF6 in the SF6 gas insulating electrical equipment, especially the GIS equipment.
Owner:CHONGQING UNIV

Embedded satellite-borne fault-tolerant temperature control system and verification method thereof

The invention discloses an embedded satellite-borne fault-tolerant temperature control system and a verification method thereof. The system comprises a satellite management computer, an on-satellite temperature control system and a ground monitoring and fault injection computer; the on-satellite temperature control system comprises a temperature control calculation host machine, a temperature control calculation standby machine and an environmental simulation computer; and the temperature control calculation host machine and the temperature control calculation standby machine are temperature control computers. The verification method comprises the following steps of: 1, initializing a file allocation; 2, initializing the system; 3, beginning simulation; 4, injecting and executing a fault; 5, processing redundant fault tolerance; 6, monitoring the ground and evaluating the fault; and 7, evaluating a fault model and a redundancy strategy of the temperature control system. The fault injection and the verification process of the whole running stage of the real satellite-borne temperature control system are completely realized; and the method is simple, convenient and reliable, and greatly reduces the test time and expense for the practical system.
Owner:BEIHANG UNIV

Reservable type human face identification door access visitor system and method

The invention discloses a reservable type human face identification door access visitor system and a method. The reservable type human face identification door access visitor system comprises a visitor equipment, an owner terminal, a passage gate and a cloud platform server, wherein the visitor equipment is connected with the cloud platform server to obtain a first human face information of a visitor and generate a first human face feature template; the owner terminal is connected with the cloud platform server to check the application of the visitor and send the check information to the cloudplatform server; the cloud platform server is connected with the passage gate to send the door opening authority of the visitor and the first human face feature template to the passage gate when thereviewing information is passing allowance; the passage gate is used for detecting whether the visitor stays in the identifying area or not; when the visitor stays in the identifying area, a second human face information of the visitor is obtained so as to further generate a second human face feature template; the first human face feature template and the second human face feature template are compared; when the first human face feature template is matched with the second human face feature template, and the passage gate obtains the door opening authority, the gate passing and releasing are executed.
Owner:上海亦源智能科技有限公司
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