73results about How to "Eliminate or reduce the impact" patented technology

The invention discloses a mineral processing process of low-grade micro-fine particle embedded iron ore hard to choose. The process comprises the following steps that first ore grinding and staged treatment is carried out firstly, settled sand is retuned to be ground again, second ore grinding and staged treatment is carried out on overflow, the settled sand is returned to a system to be ground again, the overflow enters a weak magnetic-strong magnetic system, low intensity magnetic separation treatment is carried out firstly, strong magnetic separation is carried out on tailings after the low intensity magnetic separation many times after concentration and residue separation, rough concentrates obtained through the strong magnetic separation are combined with rough concentrates after the low intensity magnetic separation, three-stage ore grinding and staged treatment is carried out, the settled sand is returned to be ground again, selective flocculation desliming operating is carried out on the overflow many times, the low intensity magnetic separation is carried out on the deslimed settled sand to obtain weak magnetic concentrates, weak magnetic tailings are concentrated and enter in reverse flotation operating to obtain reverse flotation concentrates, and reverse flotation foam enters the weak magnetic-strong magnetic system for direct strong magnetic separation treatment. The process has the advantages of being easy, convenient and stable to operate, high in iron ore concentrate recovery rate and grade, low in cost, small in the number of adopted agents and the like.

The invention discloses an automatic direct-current magnetic bias compensation device of a metering winding of a current transformer. The automatic direct-current magnetic bias compensation device is characterized in that a metering iron core of the current transformer is provided with the metering winding and a compensation winding which are independent of each other, and the compensation winding is connected with the automatic direct-current magnetic bias compensation device. The automatic direct-current magnetic bias compensation device is used for detecting the size and phase position of an even harmonic component in an output signal of the secondary-side metering winding of the current transformer, and therefore a direct-current source is controlled to inject reverse direct current of the corresponding amount to the secondary-side compensation winding of the current transformer as compensation current, the compensation current generates a magnetic field in the compensation winding, a magnetic field generated by the primary-side direct current is offset, and then automatic and on-line compensation for the direct-current magnetic bias of the current transformer is achieved. The automatic direct-current magnetic bias compensation device is remarkable in effect of automatically compensating for the direct-current magnetic bias of the current transformer.

The invention discloses effector protein Avh87 derived from phytophthora cinnamomi, and a coding gene and application thereof. The protein has the amino acid sequence of SEQ ID No. 1 in the sequence table. The nucleotide sequence expressing the protein is represented by SEQ ID No. 2 in the sequence table. Experiments show that the gene can inhibit plant cell hypersensitive reactions induced by apoptotic precursor protein Bax, or inhibit plant cell death induced by pathogenic phytophthora elicitors INF1. The effector protein Avh87 is of great significance in enriching molecular mechanism information of the interaction between the phytopathogenic oomycetes and hosts, and in establishing a comprehensive prevention and control technology strategy for phytopathogenic oomycete diseases.

The invention is applicable to the field of air cold medium pre-heating and particularly relates to a self-supporting wide gap heat exchanging element. The self-supporting wide gap heat exchanging element comprises a plurality of plate pairs which are overlapped layer by layer; each plat pair comprises upper and lower plate sheets which are arranged oppositely; a plurality of rows of convex ripples and concave ripples are distributed on the upper surfaces of the plate sheets along the same axis direction; the convex ripples and concave ripples are obtained by upwards and downwards pressing and molding the plate sheets; the convex ripples and concave ripples are distributed at intervals; the positions of the convex ripples and concave ripples on the upper plate sheets in the plate pairs correspond to the positions of the convex ripples and concave ripples on the lower plate sheets in the plate pairs; one group of opposite edges of the plate sheets are upwards folded and are transited into planes; the other group of opposite edges of the plate sheets are downwards folded and are transited into planes; the two adjacent folding edges in each plate pair are welded to form an air channel; the two adjacent plate pairs are symmetrical up and down, and the adjacent folding edges between the two adjacent plate pairs are welded to form a flue gas channel. The self-supporting wide gap heat exchanging element has the advantages that a wide gap channel can be combined, dirt and dust are not easy to deposit, the resistance fall also can be reduced and the heat exchanging efficiency is sufficiently improved.

The invention discloses an Ethernet transmission device, which includes an error correction code encoding/decoding unit for encoding or decoding an error correction code for an Ethernet signal to be transmitted. The invention also discloses a method for transmitting Ethernet signals. Step 1: Encoding the physical layer Ethernet signal that needs to be transmitted through the transmission medium with an error correction code; Step 2: Transmitting the signal that has been encoded with the error correction code to the Peer. Through the technical scheme disclosed by the invention, the transmitted Ethernet data has strong anti-interference ability, and the effect of collinear transmission with other signals is enhanced.

The invention discloses a method for determining a network message transmission route of a train vehicle. The method is applied on an ECN switch. A train grade communication network comprises at least two ETB switches. The method comprises steps of on the condition that at least two link fault points exist in the train grade communication network and the ECN switch is to transmit a first ring network message to the other ECN switch, determining a first transmission route according to the current network topology, and forwarding the first ring network message to the corresponding ETB switch through a corresponding network segment. The method and the device provided by an embodiment of the invention can eliminate or reduce an influence to integral vehicle operation on the condition that multiple link fault points exist, and furthermore improving availability of a train vehicle network. The invention further discloses a device for determining the network message transmission route of the train vehicle, wherein the device also has a corresponding technical effect.

The invention discloses a data correction method under the condition of variable load of a chemical flow system. The method comprises the following steps: firstly, acquiring measuring data of a measuring instrument within a period of time, and applying steady state detection technology for steady state determination according to key measuring bits among the measuring data; secondly, taking mean values of the measuring data in various steady states, performing steady state operating condition interval division on the mean values of the steady state data according to the load, and dividing the mean values into a plurality of different steady state operating condition intervals; and thirdly, performing data correction and remarkable error detection on multi-variable multi-group measuring data in each steady state operating condition interval, and obtaining remarkable error detection results and data correction results of various steady state operating condition intervals. The method has more reliable and more accurate correction results, simultaneously can select other steady state detection technology and data correction technology, and is flexible to apply and simple to realize.

The invention relates to a zinc oxide lightning arrester state on-line detection method, which is suitable for the power system lightning arrester on-line detection technology field. The zinc oxide lightning arrester state on-line detection method comprises steps that databases are respectively established, and in an initial state of a lightning arrester, resistances under conditions of different voltage levels, temperatures and humidity and resistive current components generated by interphase interferences under the condition of different voltage levels are stored and updated; the leakage total current of the lightning arrester and the voltage of the line of the lightning arrester are detected, and then resistive leakage current without the interphase interferences is acquired, and a voltage and resistive leakage current fundamental wave component is acquired by adopting fast Fourier transform, and therefore the resistance of the lightning arrester is acquired. The resistance is searched in the databases according to the temperature and the humidity of the current operation environment of the lightning arrester, and is compared with the calculated resistance, and then the current state of the lightning arrester is acquired. The zinc oxide lightning arrester state on-line detection method is advantageous in that the influences of the interface interferences, harmonic waves, the temperatures, and the humidity on the parameters of the lightning arrester are effectively reduced, and the current operation state of the lightning arrester is acquired accurately, and the related parameters of the lightning arrester are detected and calculated automatically, and therefore power-cut detection of maintainers is not required, and maintenance efficiency is greatly improved.

The invention discloses a frequency-locked loop comprising a digital loop filter, a data collection unit, a comparison unit, an aging correction word generation unit and a correcting unit. The data collection unit collects digital data output by the digital loop filter, carries out the weight processing on the digital data to obtain a weight value, and provides the weight value as a current weight value to the comparison unit; and the comparison unit compares the current weight value with a standard weight value and provides a comparison result to the aging correction word generation unit which regulates a current aging correction word according to the comparison result to generate the latest aging correction word. When an aging frequency drift occurs in a crystal oscillator, the influence to the output frequency can be eliminated or decreased through the drift compensation of an aging compensation feedback loop.

The invention discloses a pavement splicing method and structure for old cement concrete pavement reconstruction and expansion. A cement concrete slab splicing seam is formed in a hard shoulder of an old cement concrete slab, steps are arranged on an old road upper base layer, an old road lower base layer and an old road cushion layer for transition, poor concrete is adopted for a new road upper base layer of an expansion part, and unscreened macadam is adopted for a road bed; a new cement concrete slab and the old cement concrete slab are connected by adopting double-layer reinforcing steel bars; a high-molecular polymer anti-cracking paste is firstly stuck to the cement concrete slab splicing seam, then an asphalt concrete anti-cracking leveling interlayer is paved, and a lower asphalt concrete surface layer and an upper asphalt concrete surface layer are finally paved sequentially, wherein the lower asphalt concrete surface layer is doped with 0.3% by mass of short-cut basalt fiber. According to the method and structure, the problem that the durability of existing old cement concrete pavement reconstruction and expansion engineering is insufficient can be effectively solved, and the important significant is achieved for promoting quicker and better development of transportation industry in China.

The invention discloses a preparation method of butyl rubber. Monomer mixture solution M and initiator mixture solution I are respectively prepared by using a diluent; the M, the I, a micro-mixer and a phantastron are precooled to reaction temperature; the M and the I make contact with each other to be mixed in the micro-mixer, react for certain standing time in the phantastron behind the micro-mixer, and then are subjected to posttreatments such as diluent removal and dryingto obtain the butyl rubber. According to the preparation method, an efficient micro mixing technology is utilized, and the phenomena of unstable equipment operation and production caused by oligomer production as reaction system microenvironment is out of control are avoided, so that the standing time of a production system is shortened to be within 10s, the initiator amount is remarkably reduced, and reliable preparation of polymer products is realized under more mild temperature conditions (minus 92 DEG C to minus 40 DEG C), thus remarkably reducing production energy consumption and improving the stability of product quality.

The invention relates to a mechanical seal device for an end face seal ring with controllable bellows seal. The mechanical seal device is provided with a moving ring and a non-rotating stationary ring, wherein the moving ring can synchronously rotate along with a rotating shaft, and the stationary ring is connected with a stationary ring base; the axial relative end faces of the moving ring and the stationary ring are the respective seal faces, and at least one seal face is in a plane structure. Electric heating structures keeping the distance with the seal faces are arranged in the circumferential direction of the stationary ring and/or the moving ring with the plane-structure seal surface at intervals, and the electric heating structures are connected with a control system. On the basis that the conventional end face bellows process is kept, the mechanical seal device can process the seal faces into high-precision planes and can obtain the high surface quality on the planes and the controllable bellows seal faces through heating control for the electric heating structures, therefore the influences on the seal effects caused by various factors can be effectively eliminated and avoided, the good hydrodynamic effect can be generated, and the ideal fluid film opening force and stiffness are obtained.

The invention discloses an effector protein Avh57 from phytophthora cinnamomi as well as a coding gene and an application thereof. The protein has an amino acid sequence shown in SEQ ID NO: 1 in a sequence table. Experiments prove that the protein controlled and expressed by the gene can participate in invasion process of phytophthora cinnamomi into nicotiana benthamiana, and the gene has the function of inhibiting plant cell death induced by proapoptotic protein Bax. The phytophthora cinnamomi effector protein of the present invention has important significance on enriching molecular mechanism data information about interaction of plant pathogenic oomycetes and hosts, and establishing a comprehensive prevention and control technical strategy against plant pathogenic oomycetes diseases.

The invention provides a network delay suppression method for a wind-solar hybrid power generation system based on estimation and compensation control, and the method comprises the steps: firstly establishing the wind-solar hybrid power generation system; employing a physical principle and a T-S model method to express nonlinear dynamic states of the wind-solar hybrid power generation system; andthen designing an estimator to estimate signal perturbation of the network delay. On the basis, a feedback controller based on compensation is adopted, so that signal perturbation of network delay isrestrained, and stable work is achieved.

The invention discloses a denitration catalyst for activated carbon-supported iron-manganese-titanium and a preparation method and application thereof. The denitration catalyst is composed of a carrier and an active component supported on the carrier. The carrier is activated carbon. The active component is an iron-manganese-titanium oxide. The mass ratio of the active component to the carrier is3-30%. The denitration catalyst utilizes the activated carbon as the carrier, has a developed pore structure and promotes active component loading and gas molecule absorption. The active component mainly comprises an iron-manganese oxide. The preparation method realizes a low production cost. The denitration catalyst has good denitration performances. The titanium oxide as an aid can improve the stability of the catalyst.

The invention provides a liquid level sensor of a compressor. The liquid level sensor comprises a compressor housing. An oil storing cavity of freezing lubricating oil is arranged in the compressor housing. An opening is arranged in the compressor housing. The liquid level sensor comprises a housing body with an opening which is in sealed connection with the opening of the compressor housing. The liquid level sensor also comprises a filtering screen which is arranged on the inner side of the opening of the housing body. The filtering screen surrounds at least parts of inner wall of the housing body, so a detection cavity communicated with the oil storing cavity via the filtering screen is formed. The liquid level sensor also comprises a floating ball which is arranged in the detection cavity and rises and descends along with change of liquid levels of the freezing lubricating oil. At least one permanent magnet is arranged on the floating ball. The liquid level sensor further comprises an inductor which is installed on the outer wall surface of the housing body. The inductor can be easily assembled later and pre-assembled for mass production, individually changed and more suitable for small semi-enclosed and fully-enclosed compressors.

The invention relates to a ship propelling device, in particular to improvement of a screw propelling device for a ship. A twin-screw propelling device for the ship comprises a screw seat, and a main screw which is rotatably arranged on the screw seat through a transmission device; the screw seat is also provided with an auxiliary screw which is arranged behind the main screw; the axis of the auxiliary screw and the axis of the main screw are parallel to each and near each other; the rotation directions of blades of the auxiliary screw are opposite to the rotation directions of blades of the main screw; and the diameter of the auxiliary screw is smaller than that of the main screw. The twin-screw propelling device for the ship can eliminate or reduce the influence of spiral water flow to ship sailing and a rudder gear, and the ship can sail normally.

The invention discloses a deep sea transient electromagnetic method detection receiving device and a control method thereof. The detection receiving device comprises a controller, a transmitting coiland a receiving coil, and the transmitting coil and the receiving coil are respectively connected with the controller; the receiving coil comprises a first receiving area and a second receiving area,the plane where the transmitting coil is located serves as a reference plane, the orthographic projection of the first receiving area on the reference plane is located in the transmitting coil, and the orthographic projection of the second receiving area on the reference plane is located outside the transmitting coil; and when the transmitting coil generates a primary field, the magnetic flux passing through the first receiving area is equal to the magnetic flux passing through the second receiving area. The electromagnetic detection device is used for solving the problems that in the prior art, mutual inductance is too large and surface data cannot be received due to too large detection energy of an electromagnetic detection device, and in order to reduce the mutual inductance influence of the detection device, deep data in the deep sea environment cannot be received.

A DI (deionized) water supply system comprises a DI water storage mechanism, a DI water pumping mechanism and a DI water consuming mechanism. The DI water storage mechanism, the DI water pumping mechanism and the DI water consuming mechanism are connected sequentially through a pipeline; a return water line is connected between the DI water pumping mechanism and the DI water consuming mechanism; the return water line is communicated with the DI water storage mechanism. The DI water supply system relieves pressure by means of reflowing; the water hammer effect can be relieved or eliminated uponsudden startup of a water pump; the automation level is high, all operations are automatically controlled via a controller, and complex manual operations are not required; in addition, the DI water supply system is simple in structure and is suitable for long-term usage with no need for frequent maintenance.

The invention relates to a multi-way pipe for water supply and drainage which is characterized in that the multi-way pipe comprises a main pipe. A guiding lug in an inward protruding structure is arranged inside the pipe wall of the main pipe. The multi-way pipe for water supply and drainage is reasonable in structural design and has the flow guiding function. The multi-way pipe effectively guides flow of turbulent flow passing in and out of the multi-way pipe through the guiding lug arranged inside the pipe wall of the main pipe, so that the influence of turbulent flow is eliminated or reduced, the flow rate is improved, and the design size of the pipe diameter is correspondingly reduced. The multi-way pipe for water supply and drainage is convenient to manufacture and has a long service life, and can be used for water supply and drainage in buildings of high polymer material multi-way pipes such as three-way pipes, four-way pipes and the like.