34results about How to "Catch in time" patented technology

The invention discloses a method for filtering a DHCP data package of a local area network. According to the method, a middle layer between a network card drive and a protocol drive filters network data packages, sent to a DHCP client, in the local area network, and filtering comprises the four steps of network data package collecting, network data package screening, DHCP data package analyzing and network data package processing. The DHCP data package is gradually separated from the network data packages sent to the DHCP client, and is analyzed, a legal data package sent by a designated DHCP server is received, a data package sent by an illegal DHCP server is discarded, and therefore the aim that the DHCP client obtains the IP address from the designated DHCP server is achieved, the illegal DHCP server is prevented from distributing the IP address to the DHCP client, and meanwhile, the invention further discloses a system for filtering the DHCP data package of the local area network.

The invention relates to a device for preventing a hydraulic pressure lithotripter piston from being scored, i.e., preventing friction between a hydraulic pressure piston and a protection ring by integrlly-forming a bush made of a non-iron metal material having a hardness lower than that of the hydraulic pressure piston on an inner side friction plane of the protection ring which moves up and down in the hydraulic pressure piston; reducing a clearance between the hydraulic pressure piston and the bush to a minimum thereby reducing oil leakage; preventing the hydraulic pressure piston from being scored by forming a labyrinth type recess in an inner face of the bush on inner side friction plane of the protection ring and capturing impurities between the bush and the hydraulic pressure piston, and prolonging a life time of the hydraulic pressure piston; arranging a sealing member behind a low-pressure pipeline to prevent damages of the sealing member.

The invention discloses a continuous casting tundish for improving cleanliness of molten steel and belongs to the field of ferrous metallurgy technology. The continuous casting tundish comprises a tundish, porous bricks, an overflow groove, a slag blocking wall and a dam. The continuous casting tundish for improving cleanliness of molten steel provided by the invention makes full use of the double effects of argon foam stirring and cleaning, is safe, practical, simple and convenient, can obviously improve the separation effect of impurities and gases in the molten steel and improve the cleanliness of the molten steel and the quality of billet steel and the like.

The invention discloses a rice field ditch integrated ecological high-value rice and soft-shelled turtle planting and breeding method which comprises the following steps: 1, ruralizing a rice field and installing fences; 2, plowing the rice field; 3, transplanting rice; 4, putting soft-shelled turtles in the rice field and raising the soft-shelled turtles; 5, conducting field management; and 6, harvesting the rice and the soft-shelled turtles in good time. The method has the advantages that: 1, the foundation works of the rice field is optimized without reducing the area of the rice; 2, the foundation works of a rice ditch is optimized without destroying the structure of the rice field; 3, the landscape of the rice field is optimized to provide a good growth environment for the soft-shelled turtles; 4, a ladder type culture method is adopted to increase the planting and breeding density; and 5, the economic benefit of the rice field in a unit area is greatly increased.

The invention relates to an insect inducing belt which is made of a colored degradable strip material. The insect inducing belt is characterized in that one surface of the colored degradable strip material is coated with an insect sticking glue layer, and 0.5-4cm non-glue areas are arranged on the upper edge and on the lower edge of the insect sticking glue layer. The insect inducing belt overcomes the defect that an insect sticking plate is not easy to degrade, achieves the purpose of trapping insects on the basis of color tendency characteristics of the insects and inducing performance of attractants, and can further improve the insect trapping effect when the insect inducing belt is suspended at ventilation openings of greenhouses or conservatories.

The invention provides a current output self-diagnosis circuit, relates to the technical field of the current output self-diagnosis circuit, and solves the technical problem of enhancement of output signal reliability. The circuit comprises a current output transmitting module. The power supply input end of the current output transmitting module is connected with an external power supply. The current output control end of the current output transmitting module is connected with an external control signal. The current output self-diagnosis circuit is characterized by further comprising a differential voltage-to-current module and an analog-to-digital conversion module. The external power supply is connected with the power supply input end of the current output transmitting module via a differential voltage sampling resistor. The two differential voltage input ends of the differential voltage-to-current module are respectively connected with the two ends of the differential voltage sampling resistor. The output end of the differential voltage-to-current module is connected with the analog signal input end of the analog-to-digital conversion module. The feedback voltage output end of the analog-to-digital conversion module is connected with the output end of the differential voltage-to-current module via a feedback sampling resistor. The circuit is high in output signal reliability.

The present application discloses an alarm method and device for a PIM platform; the above-mentioned alarm method includes: using a distributed timing task framework of Spring quartz to periodically collect data of a monitoring target, and process the collected data according to the first protocol format Assembling to obtain the first monitoring data; wherein, the first protocol format includes: status flags, performance indicators and performance data; when receiving the second monitoring data carrying the object identifier sent by the monitoring target, according to the second monitoring data, Determine whether to generate an alarm; if the second monitoring data is not received, determine whether to generate alarm information according to the first monitoring data. The application can effectively and timely capture the abnormality of the monitoring target, and improve the alarm accuracy of the PIM platform.

The invention discloses a large-scale particle image velocimeter based on a near-infrared smart camera, which belongs to the technical field of non-contact open channel current surveying. The instrument consists of a processor module, an image sensor module, an optical system, a network communication module and a power module, wherein the processor module takes a 32-bit fixed point DSP (digital signal processor) chip as a core to replace a PC (personal computer) to finish image collection and processing as well as data transmission; the image sensor module adopts a monochrome CMOS (complementary metal oxide semiconductor) image sensor of a digital interface; and the optical system consists of a double-filter switcher, an electric three-variable lens, an infrared LED fill light, a motor driving module and an illumination control module and is used for realizing the remote control of lower optical image under a near-infrared waveband or full-spectrum waveband. The instrument adopts an Ethernet transmission image, flow field data, a state information and control command conforming to an IEEE (institute of electrical and electronic engineers) 802.3 protocol, and the instrument and data transmission can share one cable by supplying power in a PoE mode. The large-scale particle image velocimeter has the characteristics of strong anti-jamming capability, high temporal-spatial resolution and flexible and efficient system.

The invention arranges a chimney-shaped vertical round pipe on the ground surface; the lower end of the vertical round pipe is provided with an outer hat brim-shaped edge; the vertical round pipe leaves the ground surface by a distance; the upper end of the vertical round pipe is provided with a trough-shaped permanent magnetic ring with a V-shaped ring; a round pipe is prepared; wherein the upper end and the lower end of the round pipe are fixedly connected with a conical magnetic ring respectively, and the side part of the round pipe is provided with an air inlet hole which is inclined upwards from exterior to interior; the other side of the round pipe right facing to the inclined hole is provided with a wind direction rudder; subsequently, the round pipe is vertically arranged in the trough-shaped permanent magnetic ring with the V-shaped ring at the upper end of the vertical round pipe, with a gap and the same polarity face to each other; subsequently, a vertical round pipe with a inverted V-ring trough-shaped permanent magnetic ring is prepared and arranged above the round pipe with the inclined hole; furthermore, the inverted V-ring trough-shaped permanent magnetic ring and the conical magnetic ring at the upper end of the round pipe face to each other with a gap and the same polarity; the vertical round pipes at the upper side and the lower side of the round pipe with the inclined hole are connected with each other by a plurality of spaced connecting rollers; an impeller and a power generator are respectively arranged at the inlet of the vertical round pipe with the edge and the outlet of the upper-most vertical round pipe; and the wind power generation chimney generates the power by the horizontal wind and updraft simultaneously, has high efficiency and is practical.

The invention discloses a webpage tampering detection method and device. The method includes: detecting tampered content in a webpage according to a tampering feature library, and extracting link spamming in the tampered content; if frequency of occurrence of the extracted link spamming is higher than a first preset threshold, storing the extracted link spamming in a link spamming library; if the tampered content in the webpage is not detected according to the tampering feature library, detecting the tampered content in the webpage according to the link spamming library, and marking hit link spamming; generating new tampering feature rules according to the marked link spamming in the link spamming library, and adding the new tampering feature rules in the tampering feature library. By the scheme, the tampering feature rules are extended continuously by a self-directed learning mode, the webpage is detected according to the determined link spamming, varietal link spamming can be captured timely, and detection accuracy of webpage tampering is improved significantly.

The invention discloses a processing method for preventing instructions from returning to zero after a control unit is restarted in a thermal-control DCS. On the original configuration logical basis,a selector and / or a door logical device are introduced, an operator is controlled by initialized state signals of a control unit to enter the tracking state, control instructions output by the operator are equal to position feedback signals of controlled equipment, it is avoided that the control instructions return to zero after the control unit is initialized, and safe running of a unit is influenced, and the original function of a system is reserved. According to the processing method, by introducing a number-setting device, a non-gate logic device, a timer, a comparator and a gate logic device, three methods for obtaining the initialized state signals of the control unit are provided.