104results about How to "Accurate isolation" patented technology

In 3D stacked multilayer semiconductor memories including NAND and NOR flash memories, a lightly boron-doped layer is formed on top of a heavily boron-doped layer to form a select transistor, wherein the former serves as a channel of the select transistor and the latter serves as an isolation region which isolates the select transistor from a memory transistor.

A response system which produces strategies to contain hosts compromised by a worm. One minimizes the damage so caused and the loss of business values induced by actions taken to protect a network. The approach uses logical representation of the target network. By abstracting low level information such as switches, routers and their connectivities, theoretical algorithms are used to find the optimal containment.

A liquid transfer device is provided for biochemical assay, including a pipette forming an interior space extending in an axial direction and having first and second ends. The first end forms an opening and the second end forms an enclosed variable volume, whereby variation of the volume causes a change of pressure to selectively induce a suction force and a releasing force in the pipette. An analysis container includes a plurality of receptacles retained by a slab. A film covers the slab to seal the container. A movement control device includes a manipulator that releasably holds the pipette and a tray that forms a cavity for receiving and retaining the container. The pipette and the tray are movable with respect to each other in order to fill/draw test agent into/out of the receptacles.

A thermocycler apparatus and method for rapidly performing the PCR process employs at least two thermoelectric modules which are in substantial spatial opposition with an interior space present between opposing modules. One or multiple sample vessels are placed in between the modules such that the vessels are subjected to temperature cycling by the modules. The sample vessels have a minimal internal dimension that is substantially perpendicular to the modules that facilitates rapid temperature cycling. In embodiments of the invention the sample vessels may be deformable between: a) a shape having a wide mouth to facilitate filling and removing of sample fluids from the vessel, and b) a shape which is thinner for conforming to the sample cavity or interior space between the thermoelectric modules of the thermocycler for more rapid heat transfer.

A pattern matching apparatus comprising: means for storing photographed image data of a semiconductor device; means for storing CAD data of said semiconductor device; an information input means for inputting information on the white band width contained in said image data; a pattern extracting means for extracting a pattern on the semiconductor device from said image data by using the white band width information; and a matching means for matching said pattern with the CAD data.

Provided is a fault identification and protection method of an electrified railway AT traction network. When network voltage is lower than a specified value, labeling no-load trend symbol values of the near ends and the far ends of a touch net T and a negative feeder F in each self-coupling segment with 0, labeling influent trend symbol values with 1, labeling effluent trend symbol values with -1, if an absolute value of a sum of the trend symbol values of two ends of the touch net T in each self-coupling segment is larger than or equal to 1, or a failure absolute value of a sum of the trend symbol values of two ends of the negative feeder F is larger than or equal to 1, or a failure absolute value of a sum of the trend symbol values of two ends of a touch net T branch and a negative feeder F branch is larger than or equal to 1, respectively judging the touch net T to be in short circuit failure to the ground, or the negative feeder F to be in short circuit failure to the ground, or the touch net T to be in short circuit failure to the negative feeder F, and breaking off all breakers at two ends of each self-coupling segment. Short-circuit reactance calculated according to corresponding voltage and short-circuit current at two ends of each self-coupling segment and the corresponding length of the self-coupling segment determine failure positions.

An ion trap in which highly accurate isolation, ECD, and CID can be efficiently performed. A reaction cell and a mass spectrometer of the present invention include an ion-trap which has a plurality of rod electrodes and creates a multipole field, a means for generating a magnetic field in the axial direction of the ion-trap, a means for creating a DC harmonic potential in the axial direction of the ion-trap, and an electron source for introducing electrons into the central axis of the ion-trap. The identification ability is greatly improved compared with the prior art.

The invention discloses a multi-failure isolation method for a redundant strapdown inertial navigation system. The method comprises the following steps: acquiring output data of inertial devices of the redundant inertial navigation system at first, performing failure detection by virtue of a generalized likelihood ratio method, estimating predicted values output by the inertial devices at failure moments by virtue of a linear estimation method when failures are detected to occur to the redundant strapdown inertial navigation system, finally comparing the predicted values of the inertial devices with output values to obtain difference values, locating the failing inertial devices, and isolating the failing inertial devices. According to the method, the generalized likelihood ratio method is combined with the linear estimation method, the characteristics of high sensitivity and convenience for implementation of the generalized likelihood ratio method and small calculated amount, high accuracy and the like of the linear estimation method are fully utilized, and the failing inertial devices are timely and accurately isolated when a plurality of inertial devices of the redundant strapdown inertial navigation system simultaneously fail, so that the reliability of the inertial navigation system is ensured.

The invention belongs to the technical field of new energy electricity generation and grid connection, and particularly relates to a method for protecting a collection system line in a large-scale photovoltaic power station. The method comprises the following steps: deriving a unified expression of fault currents under different control targets aiming at a positive and negative sequence bisynchronous rotating coordinate system current controller which is widely adopted by a centralized photovoltaic inverter and the influence on characteristics of a power supply of a photovoltaic cell panel on a direct current side; on the basis of the unified expression, analyzing the current protection performance of a 35kV collection line in the photovoltaic power station; providing a distance protection replaced new configuration scheme aiming at the situation that current protection on a downstream photovoltaic side of an overhead line cannot act correctly. The method is not influenced by the factors of a photovoltaic output condition and operating power; the problem about setting calculation of a short circuit current threshold value on the photovoltaic side is avoided; the operating safety and reliability of the photovoltaic system in the power station are improved.

In a method for use in an apparatus displaying an image, an object in the image at least partially marked by a mask is highlighted. Successive selection points located on a line crossing a boundary of the mask represent a path input by a user using continuous movements and correspond to respective reference pixels in the image. An initial reference point where the line crosses the boundary is used as a seed point to successively change an attribute of successive points in the mask centered on the seed point for all mask points corresponding to image pixels surrounding the respective reference pixel and for each of which points the corresponding pixel attribute differs from that of the corresponding reference pixel in the image by no more than a predetermined threshold.

The invention discloses an efficient epidemic prevention system and method implemented by using wearable equipment. Identity identification and binding are realized through the FRID. A receiving end is arranged at the entrance and exit of the field; manual temperature measurement and code scanning are not needed at an entrance and an exit, receiving ends are arranged in different sub-places respectively, positioning management and temperature measurement second-level implementation of the user are achieved, manual intervention is not needed, and when the user with abnormal body temperature passes through the entrance receiving end, the background automatically displays the name and body temperature of the abnormal user, prompts security intervention and pays attention to personal protection; once a definite case occurs, if the patient is in direct close contact with the patient, the system background calls related data, the contact time and the contact place of the direct close contactperson and the indirect contact person of the patient can be quickly and accurately positioned, epidemiological investigation is completed, accurate isolation and medical observation are implementedby adopting broken and appropriate measures, and normal production and teaching are not affected.

A low voltage isolation switch is coupled between an input terminal suitable for receiving a high voltage signal and an output terminal suitable for transmitting this high voltage signal to a load. The isolation switch includes a first driving transistor coupled between a first reference terminal and an intermediate node, a second driving transistor coupled between the intermediate node and the second reference terminal, a control transistor connected across a diode block coupled between the input and output terminals. The control transistor has a control terminal connected to the intermediate node through a low voltage decoupling block that includes first and second substrate terminals, first and second parasitic capacitive element connected to these first and second substrate terminals, and first and second decoupling transistors coupled in parallel to each other and having control terminals connected to the first and second parasitic capacitive elements, respectively.

Disclosed herein is a muffler of a scroll compressor. The muffler includes a first muffler having a pair of chambers defined above an outlet of a fixed scroll to communicate with the outlet and a gas passage hole formed at the center of an upper end thereof, and a second muffler located around the first muffler to be spaced apart from the gas passage hole of the first muffler and having a chamber including one or more guidance paths of the fixed scroll. The muffler can achieve reduction of operational noise, sufficient separation of oil contained in discharge gas, and efficient isolation between a discharge pressure inside the muffler and outside suction pressure.

The present invention relates to a security protocol based on received signal intensity in a wireless sensor network, specifically to secure routing and key management. According to the number of adjacent nodes, the intensity of received signals and the energy value thereof, a convergent node is selected by a convergent node selection equation. According to the number of the adjacent nodes and the throughput of the convergent node, a hot zone is determined by a hot zone selection equation. By comparing the feature similarity between collected data and pre-stored abnormal data, abnormal data is detected. An inter-node session key is generated dynamically, and according to whether a hot zone is determined, different keys are selected to generate a function. The key and data are encrypted in a manner of combining a public key cipher mechanism and a symmetric cipher mechanism. The security protocol improves flexibility of a key, enhances the rationality for selecting a convergent node and well ensures safe transmission of inter-node data.

A system and method are provided for implementing performance improvements in a multicast protocol for networks that support incipient congestion indications via packet marking in instances of packet loss in the network during time-correlated blockages by providing indications in the physical (PHY) layer. A receiver rate calculation is adjusted so that a loss due to blockage is ignored completely and only packets marked using an Explicit Congestion Notification (ECN) packet marking protocol are treated as losses. Receiver rates are modified based on ECN principles to ignore losses. A NORM receiver rate equation may remain substantially unchanged while a sender is enabled to keep sending at a higher data rate, even in instances of blockage in support of higher system throughputs without defining a completely new receiver rate equation. Time-correlated blockages are not treated as losses.

A collapsible exercise machine for strengthening the core muscles (transverse abdominal, internal obliques, external obliques, rectus abdominis, and erector spinae) includes a frame mounted on a base on which a user sits and manipulates an upstanding lever arm. A seat is convertible between two differently-angled positions for back extension or abdominal exercises. The lever arm rotates a curved tube having a plurality of force adjustment holes. The tube passes through a frame at the upper end of a gas spring, and engaging an adjustment pin on the frame with different adjustment holes changes the amount of resistance. The entire frame above the base can be vertically adjusted to accommodate different sizes of user without altering the relative position between the seat (and user's hips) and the axis of rotation of the lever arm thus not affecting/changing the designated resistance between users of different heights (resistance is affected when the lever arm is lengthened). The connection between the frame and the base enables the unit to be collapsed to a profile small enough to fit under a bed.

The embodiment of the invention provides a device and a method for automatically isolating an automatic system line fault in a power distribution network. The device for automatically isolating the automatic system line fault in the power distribution network comprises a fault section positioning device, an accident trip circuit breaker positioning device and a processor device, wherein the fault section positioning device is used for positioning a feeder fault section; the accident trip circuit breaker positioning device is used for positioning an accident trip circuit breaker; and the processor device is used for judging whether the accident trip circuit breaker is restored to a switching-in position according to a relationship between the accident trip circuit breaker and the feeder fault section after the fault section is isolated. According to the embodiment of the invention, the fault point can be timely and accurately positioned and isolated after an accident occurs in the power distribution network, so that the power supply in a non-fault section is automatically restored. For example, the accident trip circuit breaker positioning device, the processor device and the automatic feeder function of the fault section positioning device are realized by utilizing a computer system, and the operation of finding and isolating the fault section and automatically restoring the non-fault section is finished within dozens of seconds generally.

A silicon carbide semiconductor device includes: an element isolation layer and an electric field relaxation layer. The element isolation layer is arranged, from the surface of a base region to be deeper than the base region, between a main cell region and a sense cell region, and isolates the main cell region from the sense cell region. The electric field relaxation layer is arranged from a bottom of the base region to be deeper than the element isolation layer. The electric field relaxation layer is divided into a main cell region portion and a sense cell region portion. At least a part of the element isolation layer is arranged inside of a division portion of the electric field relaxation layer.