54results about How to "Speed up decay" patented technology

The invention provides a silicon-based IGBT and silicon carbide Schottky diode hybrid grid driving system. The grid driving system comprises a driving input stage, a logic enabling circuit, a current source circuit, an IGBT grid voltage-to-time change rate detection circuit, an IGBT collector current-to-time second-order differential change rate detection circuit, an IGBT, a Schottky diode D1 and a sampling resistor Rx. All stages of the IGBT starting process are mastered in real time by sampling and detecting the grid voltage VG of the IGBT, the change rate dVG / dt of the grid voltage and the second-order change rate d(dIc / dt) / dt of the collector current, after judgment of the logic enabling circuit and control over the current source circuit in the grid driving circuit, the size of the driving current in the IGBT starting process can be changed, and then the purposes of inhibiting current oscillation to reduce current overshoot and starting loss in the IGBT starting process are achieved.

The present invention discloses a method for preparing a lithium-replenishing material Li2NiO2, and a lithium ion capacitor using Li2NiO2. Li2O and NiO are used as raw materials, and are sintered at ahigh temperature after being ball milled in a protective atmosphere; then, Al2O3 is added to continue ball milling in the protective atmosphere and then sintered at a high temperature to obtain a target Li2NiO2. The lithium ion capacitor comprises a positive electrode, a negative electrode, a separation membrane and an electrolyte; the positive electrode comprises a positive electrode current collector, and a positive electrode material, a conductive agent and a binding material, which are dissolved in a solvent and coated on the positive electrode current collector; the negative electrode comprises a negative electrode current collector, and a negative electrode material, a conductive agent and a binding material, which are dissolved in the solvent and coated on the negative electrode material; the positive electrode material comprises a first positive electrode material and a second positive electrode material; the first positive electrode material is one of a carbon nanotube, graphene, active carbon, and nanogate carbon; and the material of the second positive electrode is Li2NiO2. The negative electrode can be pre-embedded with lithium by first charge and discharge.

The invention discloses a low-complexity super-Nyquist transmission method. Information sequence is Gaussian pulse shaped and performs super-Nyquist code element speed transmission, a receiving end uses a gaussian pulse shaping filter matched with a transmitting end to perform matching filter on a received signal, and the receiving end performs sampling on output of a matching filter with the same super-Nyquist sampling rate with the transmitting end. The maximum likelihood sequence estimation (MLSE) is performed on a sampling signal to compensate the intersymbol interference (ISI) of the receiving signal, soft value output information is obtained, and the system bit error rate (BER) performance can be further improved through performing iteration exchange on prior soft value information between a channel decoder and a FTN equalizer. The adopted gaussian shaping pulse can make the FTN transmission system ISI tap energy to rapidly decay, the MLSE equalization algorithm is adopted, only less ISI tap amount can acquire quasi-optimal BER performance, and the system realization complexity is greatly reduced.

The invention relates to a detecting structure and method for detecting a turn-to-turn insulation fault of an electric reactor through an oscillation method. The structure comprises a discharging ball gap and a pulse capacitor respectively connected to one end of the electric reactor, wherein the other end of the discharging ball gap is connected to the negative electrode of a power supply, the positive electrode of the power supply is connected to the other end of the reactor, and the other end of the pulse capacitor is connected to the negative electrode of the power supply. Since a discharging ball gap and a pulse capacitor are respectively connected to one end of the electric reactor, the power supply provides electric energy, and the pulse capacitor is charged through the power supply. When the pulse capacitor is charged to a certain value, the discharging ball gap discharges, and the pulse capacitor and the reactor form a damped oscillation circuit of a certain frequency. When turn-to-turn short circuit fault occurs to the reactor, the inductance value is reduced, and the active loss is increased sharply. The wave-shaped oscillation period of the reactor is reduced, and the attenuation speed of amplitude is accelerated, so that presence or occurrence of turn-to-turn short circuit fault of the reactor can be detected accurately. The detecting structure and method are highly practical.

The invention provides an efficient frequency-division multiplexing waveform generation method based on zero-trailing DFT extension, and belongs to the technical field of the information and communication. The efficient frequency-division multiplexing waveform is high in spectrum effect, low in out-of-band leakage and low in peak-to-average ratio. The method comprises the following steps: step one, performing zero-filling on the head and tail of a sending end modulation symbol to acquire a time domain sending symbol sequence, performing DFT extension transform of N points on the time domain sending symbol sequence to obtain a frequency domain signal vector; step two, filing (1-a)N / a zeros at the tail of the obtained frequency domain signal vector, and performing sub-carrier mapping on the zero-filled frequency domain signal vector; and step three, performing IFFT transform of K points on the signal vector after the sub-carrier mapping, abandoning last (1-a)N / a data of the acquired frequency domain signal vector after the transformation, wherein the rest N data is the time domain sending symbol vector with the zero-trailing feature, and the formed waveform is the generated efficient frequency-division multiplexing waveform; a represents the spectrum compression factor, and a is equal to N / K.

The invention discloses an ultrasonic ranging excitation signal adjusting system and method for reducing blind areas. The system includes an excitation signal adjustment module, which is used for adjusting components of excitation signals, having a specific constituent structure, that are transmitted to a transceiving integrated ultrasonic transducer, wherein the excitation signals with the specific structure in terms of a signal sequence SS are a forward periodic signal which lasts n1 periods T, a DC signal which lasts T / 2 and a reverse periodic signal which lasts n2 periods T. According to the invention, the attenuation speed of residual oscillation waves on the transceiving integrated ultrasonic transducer is accelerated by adjusting the components of the excitation signals having a unique constituent structure, thereby reducing blind areas during ultrasonic ranging. The scheme can be easily implemented by software and hardware, and the effect is great.

The invention relates to a cavity group differential pressure regulation room. The technical problem to be solved by the invention is to provide a cavity group differential pressure regulation room which solves the arrangement of ultra-great scale pressure regulation room by the type of pressure regulation room group and restrains the amplitude of a ground swell and speeds up the fluctuation attenuation speed of the ground swell by adopting a differential pressure regulation room, thus ensuring the safety of the structure of the pressure regulation room and improving the stability of the operation of the unit and the power supply quality of the unit. The technical proposal to solve the problem is that the cavity group differential pressure regulation room is characterized in that the end of a long water-traction tunnel is connected in series with 2 through 4 pressure regulation room group with small scales; furthermore, an upper chamber communicated hole is arranged between the pressure regulation rooms. The invention can be applied to hydropower engineering.

The invention discloses a dustproof harvester which comprises a traveling chassis, an operation platform, a straw pulling instrument, a shearing instrument, a conveying chain, a threshing mechanism and a screening mechanism, wherein the threshing mechanism comprises a threshing cylinder and a concave grid, the axial direction of the threshing cylinder is parallel to the forward direction of the combine harvester, a grass discharging opening of the threshing mechanism is arranged at the tail of the shaft end of the threshing cylinder, a stirring chamber is arranged below the grass discharging opening, is fixed on a rack, is provided with a water injection vessel, and is internally provided with a stirring rod driven by a motor, and the a throwing opening is formed in the top end of the water injection vessel. According to the dustproof harvester, straws cut by the harvester is directly put into the stirring chamber, water and a leavening agent are injected into the stirring chamber, so that flocculent straw powder becomes a mixture to be discharged from the harvester, the straw powder is prevented from floating in air to be absorbed into human bodies, and the rot speed of the straw is increased.

The invention discloses a banana stem and leaf residue decomposing inoculant for inhibiting fusarium wilt and a preparation method thereof. The banana stem and leaf residue decomposing inoculant is prepared by using trametes versicolor with a cellulose, lignin and hemicellulose decomposing function, trichoderma citrinoviride, aspergillus oryzae, bacillus amyloliquefaciens with a biological control function, and streptomyces pristinaespiralis for compound fermentation. The banana stem and leaf residue decomposing inoculant can effectively accelerate the decaying of banana stem and leaf residues returned to the field, while inhibiting the growth of fusarium wilt of banana and other pathogenic bacteria; the decomposition of the banana stem and leaf residues is accelerated after applying the decomposing inoculant in the field, wherein the weight loss rate of the banana stem and leaf residues is increased remarkably; the tensile force of the banana stem and leaf residues is reduced remarkably; the number of soil pathogens including antagonistic bacillus and actinomycetes is increased remarkably; and the number of pathogenic organisms is reduced remarkably.

The present invention relates to a novel dielectric loss angle measurement method with high precision based on a Nuttall window - five-point converting FFT. The method includes the steps as follows: cutting off input signals by utilizing a Nuttall window so as to reduce a cut-off error; calculating out a signal phasor sequence after cut off by utilizing the FFT; performing a weighted average to a FFT output sequence by utilizing the five-point converting so as to increase the spectral line decay rate outside a basic frequency point, thereby reducing the spectrum leakage effect; and finally, calculating out the dielectric loss angle by analyzing the novel weighted signal phasor sequence. The novel dielectric loss measurement method can efficiently overcome influence of a DC component, a fundamental frequency, a harmonic wave, and random noise on the dielectric loss angle measurement, the measurement accuracy can achieve a value of 0.5*10<-5> under the condition of random noise interference, and the measurement accuracy can achieve a value of 0.5*10<-6> under the condition of other interferences.

The invention discloses a soil improvement method which comprises the steps as follows: firstly, oxidizing biomass charcoal under the irradiation of a xenon arc lamp, and spraying a hydrogen peroxidesolution for once every 6 to 9h during oxidization; in winter, ditching in the land to form criss-crossed gullies; mixing original soil obtained after ditching with the oxidized biomass charcoal according to a ratio of 1:(0.5 to 1), applying the mixture of the biomass charcoal and the original soil into the gullies, and applying soil to bury and tamp; and covering the tamped gullies with crop straws, and from the date when tamping is carried out, uniformly applying animal waste to the crop straws every 10 to 20 days until the spring next year. According to the invention, by modifying the biomass charcoal, not only is the environmental restoration ability improved, but also the soil improvement effect is improved in a low-cost mode.

The invention discloses a road greening trimming device for municipal works. The device comprises a collection tank, a fan, a first motor, a second motor and a feeding hole, wherein an inner containerlayer is fixed inside the collection tank; a discharge hole is formed in the middle of the inner container layer; a top cover is connected above the collection tank; a discharge hose is arranged on the right side of the fan; the feeding hole is formed in the surface of the collection tank; a fixing rod is connected with a connecting plate through a connecting bolt; fixing clips are fixed on the surface of the collection tank; a moveable plate is connected at the upper part of the collection tank; and a support foot is connected with the moveable plate. The road greening trimming device for municipal works is provided with a rotating rod, a cutting tooth belt on the outer side of the fixing rod can be conveniently rotated out by rotating the fixing rod, cutter teeth on the surface of the cutting tooth belt are meshed and rotated under driving of the first motor to cut twigs and leaves, twigs and leaves on a green belt can be conveniently trimmed, hand holding of operators is not needed, and labor conservation and convenience can be achieved.

The agricultural waste deodorizing bacterial preparation is prepared through the following steps: the slant test tube culture, liquid seed culture and tertiary extension culture of giant bacillus, micro xanthoderma and Koningii Trichoderma to prepare three kinds of pure bacterial preparation; inoculating the three kinds of pure bacterial preparation in the equal ratio and inoculated amount of 0.2 % to carrier culture medium and culturing at water content of 55-60 % and temperature 28-34 deg.c for 7 days; and final drying the compound bacterial preparation at 35-45 deg.c and live bacteria inspection. The bacterial preparation of the present invention has obvious deodorizing effect and fast acting.

The invention discloses a full-water-soluble organic-inorganic compound fertilizer, which comprises potassium fulvate, ammonium sulfate, monopotassium phosphate, anhydrous magnesium sulfate, metalloproteinase and Jikang enzyme. The Jikang enzyme is prepared by the following steps: uniformly stirring and mixing 100 parts of plant acid, 600 parts of amino acid and 5 parts of an amino acid surfactant; adding 100 parts of mineral source fulvic acid and 150 parts of humic acid, fully stirring and uniformly mixing all the components, adding the mixture into a fermentation tank, inoculating a microbial agent for cultivation for 18 hours, and finally adding 15 parts of chitosan and 10 parts of subtilisin, and uniformly mixing all the components for obtaining the Jikang enzyme. The invention also discloses a preparation method of the fertilizer, which comprises the following steps: preparing metalloproteinase, and mixing the raw materials. The compound fertilizer is a biological, organic and inorganic combined fertilizer, organic components (fulvic acid) in the fertilizer form colloidal substances in soil, the formation of a soil aggregate structure can be effectively promoted, and the water, fertilizer, gas and heat conditions of the soil are coordinated.

The invention discloses a fertilizing device for returning rice straw to field. The device comprises a rotary cultivator (1) which can be connected with a straw crushing agricultural machine; and twoends of the rotary cultivator (1) are respectively provided with support rods (2) which can be rotationally connected and matched with the rotary tiller, a straw guide box (3) which can be rotationally connected and matched with the support rod is arranged between the ends of the two support rods (2), a first ear seat (4) is welded and fixed on the rotary cultivator (1), a hydraulic rod (5) whichcan be rotationally connected and matched with the first ear seat (4) is arranged on the first ear seat (4), a second ear seat (6) which can be rotationally connected and matched with the hydraulic rod (5) is arranged at the piston shaft end of the hydraulic rod, and the second ear seat (6) is welded and fixed on the straw guide box (3). According to the present invention, the device has simple structure, the decay speed of rice straw can be effectively improved, and at the same time, the temporary barren phenomenon of the soil after a large amount of nitrogen fertilizer is consumed in the soil during the decay process can be overcome.

The invention provides a zero-trailing extended DFT-based high spectral efficiency multiplexing communication method which has the advantages of being low in complexity, effectively demodulating transmitted signals and improving performance by adjusting the length of a zero trail, and belongs to the technical field of information and communication. The method comprises a sending step and a receiving step, wherein the sending step comprises constructing a time-domain sending symbol vector with a zero trailing feature and sending the time-domain sending symbol vector; and the receiving step comprises: step B1: receiving a signal vector, adding K-N zeros at the end of the received signal vector, obtaining a time-domain receiving symbol sequence, and obtaining a frequency-domain receiving signal by performing K-point FFT on the time-domain receiving sequence; step B2: taking top-N data of the frequency-domain receiving signal for performing N-point DFT; and step B3: extracting data subcarrier data after the N-point DFT for zero-forcing detection so as to realize symbol demodulation, wherein alpha represents a spectrum compression factor, and alpha = N / K. According to the invention, the method is easily realized, and the complexity of a demodulation algorithm is quite low.

The agricultural waste deodorizing bacterial preparation is prepared through the following steps: the slant test tube culture, liquid seed culture and tertiary extension culture of giant bacillus, micro xanthoderma and Koningii Trichoderma to prepare three kinds of pure bacterial preparation; inoculating the three kinds of pure bacterial preparation in the equal ratio and inoculated amount of 0.2 % to carrier culture medium and culturing at water content of 55-60 % and temperature 28-34 deg.c for 7 days; and final drying the compound bacterial preparation at 35-45 deg.c and live bacteria inspection. The bacterial preparation of the present invention has obvious deodorizing effect and fast acting.

The invention discloses an agricultural paddy field straw smashing and field-returning device, and belongs to the technical field of agricultural equipment. The agricultural paddy field straw smashing and field-returning device comprises a moving seat, wherein a cavity is formed in the middle of the moving seat in a penetrating mode; a guide seat is fixedly arranged on the rear wall of the moving seat; an impeller is arranged on the rear part of the left side of the cavity; a shaft center is coaxially and fixedly connected to the middle of the impeller; the left end of the shaft center penetrates through the left wall of the cavity, extends to the outside and is coaxially and fixedly connected with a driven wheel; a driving wheel is arranged in front of the driven wheel; a transmission belt is connected between the driven wheel and the driving wheel; a rotating shaft is coaxially and fixedly connected to the middle of the driving wheel; the right end of the rotating shaft sequentially penetrates through the left wall of the moving seat and the right wall of the cavity, extends to the outside and is coaxially and fixedly connected with an electric motor B; a filter plate is fixedly arranged in the cavity relative to the position behind the rotating shaft; and a smashing assembly is arranged in the middle outside the rotating shaft. The agricultural paddy field straw smashing and field-returning device provided by the invention can perform integrated operation of harvesting, smashing and field-returning on straws so as to be beneficial to saving a large amount of labor consumed by a farmer for harvesting the straws, and is convenient, rapid, safe and flexible.

A processing method for salix integra-reed interweaving is disclosed. The method includes steps of subjecting salix integra to soaking and drying treatment and subjecting reed to soaking and drying treatment. Through the method, toughness of the salix integra and the reed can be improved, adaptation between the salix integra and the reed is improved, a salix integra-reed interwove product has anticorrosion and mothproof effects and the service lifetime of the product is prolonged.

The invention discloses an integrated machine for stubble burying, plowing, planting and sowing, which comprises a frame, one end of the bottom of the frame is provided with a rotating shaft, and the other end of the bottom of the frame is provided with a traveling wheel, and the distance between the rotating shaft and the traveling wheel is A plowing rake is provided, and the plowing harrow is fixedly connected to the frame through the plowing harrow connecting rod. A seeding box is arranged on the top of the frame close to the traveling wheel, and the sowing box is far away from the end of the plowing harrow connecting rod. One side is provided with a fertilizer box, and the position corresponding to the bottom of the frame and the seeding box is provided with an air-suction seed metering device. The present invention designs a cutting knife perpendicular to the rotary tiller on the rotary tiller, which can be used on the opposite side. When the farmland is plowed, the straw in the farmland is cut off, thereby speeding up the rotting speed of the straw. After the farmland is plowed, the farmland is directly trimmed by the plowing rake, and then fertilization and seeding are carried out. The present invention integrates plowing and sowing In one, it makes the cultivation of the farmland more convenient.

The invention provides a rice field straw chopper, and belongs to a part of agricultural machinery. The rice field straw chopper overcomes the defects of high operation load, poor operation effect and poor economical efficiency of the rice field straw chopper used in the prior art. The rice field straw chopper mainly comprises a longitudinal arc knife, a left transverse oblique knife and a right transverse oblique knife, wherein the left transverse oblique knife and the right transverse oblique knife are welded on the longitudinal arc knife respectively; the curvature radius of the longitudinal arc knife is 100 to 110 millimeters; and the welding angles between the left transverse oblique knife and the longitudinal arc knife and between the right transverse oblique knife and the longitudinal arc knife are 55 to 85 degrees in the front view direction, 155 to 169 degrees in the side view direction and 140 to 172 degrees in the bottom view direction. The rice field straw chopper is mainly used for various rotary cultivators.

The invention provides a straw-covering tillage machine for a paddy field. The machine comprises a transmission gear box (4) arranged at the upper part of a rack (1), and a straw covering cutter mechanism arranged at the lower end of the left part of the rack (1); the straw covering cutter mechanism comprises a straw covering cutter shaft (13), and a plurality of straw covering cutters which are arranged around the straw covering cutter shaft (13); each straw covering cutter comprises a right straw covering cutter (11) and a left straw covering cutter (12); bodies (15) of each right straw covering cutter (11) and each left straw covering cutter (12) are of arc-shaped structures with edges, and cutter heads (14) are of inclined structures which extend in the direction far away from the cuter bodies (15); the cutter heads of each right straw covering cutter (11) and each left straw covering cutter (12) extend in opposite directions; each right straw covering cutter (11) and each left straw covering cutter (12) are alternatively arranged on a straw covering cutter shaft (13). The machine can be applied to wheat straw covering and tilling in the paddy filed; a three-stage straw-covering mechanism is used for working, so that the straw covering rate can be effectively increased.

The invention belongs to the technical field of toilet paper, and particularly relates to hydrolysable toilet paper which comprises a body; an easy-to-tear strip is pressed on the body, cross-shaped patterns are pressed at four right angles of the body, two middle layers are hydrolysable layers, and two outer layers are wrapping layers. The wrapping layer and the hydrolysis layer are made of materials easy to hydrolyze; the plant cellulose selected by the hydrolysis layer is made of broad-leaved trees, and the hydrolysis efficiency and rotting speed of the body in water are increased by utilizing the characteristic of low lignin content in the broad-leaved trees; the plant cellulose is unidirectionally stirred in a beater, so that the plant cellulose can be arranged in order, the plant cellulose is easy to disperse in water, and the hydrolysis of the body is accelerated; particles in the hydrolysis layers are bubbled when meeting water, the bubbles impact the hydrolysis layers and separate the two hydrolysis layers, and then water flow accelerates decomposition of the hydrolysis layers.

The invention discloses a novel rubbish can. The rubbish can comprises an upper can body and a lower can body. An LED display screen is installed on the outer wall of the front face of the upper can body. The upper can body comprises a left can main body and a right can main body. The left can main body and the right can main body are of an integrally-formed structure. A first rubbish putting opening is formed in the top of the left can main body. The bottom of the right can main body is open, the top of the lower can body is open, and the left can main body and the right can main body are in butt joint with the lower can body. The novel rubbish can has the advantages that the rubbish putting opening can be automatically closed; the rotting speed of rubbish in the rubbish can can be decreased; peculiar smells in the rubbish can can be dispelled; the rubbish in the rubbish can can be easily poured into a rubbish truck.

The invention relates to a device with functions of seedling protection and straw anti-burning and decay promotion for a no-tillage planter. The device comprises a frame, wherein a seeding tube and a furrow opener are sequentially arranged on the frame along the forward direction of the no-tillage planter, and a straw decay promotion device moving synchronously with the furrow opener is also arranged on the frame. The invention provides the device with the functions of seedling protection and straw anti-burning and decay promotion for the no-tillage planter.

The invention discloses a brand-new multifunctional trash can. The trash can comprises an upper can body and a lower can body. An LED display screen is arranged on the outer wall of the front face of the upper can body. The upper can body comprises a left can body and a right can body. The left can body and the right can body are of an integrally-formed structure. A first trash put-in opening is formed in the top of the left can body. The bottom of the right can body is of an open type. The top of the lower can body is of an open type. The left can body and the right can body are connected with the lower can body in a butt joint manner. The brand-new multifunctional trash can has the beneficial effects that the trash put-in opening can be automatically closed; the rotting speed of trash in the trash can can be increased; peculiar smells in the trash can can be dispersed; and the trash in the trash can can be easily poured into a trash truck.

The invention discloses a novel rubbish bin which comprises an upper bin body and a lower bin body. An LED display screen is mounted on the outer wall of the front face of the upper bin body. The upper bin body comprises a left bin body and a right bin body. The left bin body and the right bin body are of an integrally-formed structure. The top of the left bin body is provided with a first rubbish throw-in opening. The bottom of the right bin body is open. The top of the lower bin body is open. The left bin body and the right bin body are in butt joint with the lower bin body. The novel rubbish bin has the beneficial effects that the rubbish throw-in openings can be sealed automatically; the rotting speed of rubbish in the rubbish bin can be decreased, peculiar smells in the rubbish bin can be dissipated, and the rubbish in the rubbish bin can be easily poured into a rubbish truck.

The invention relates to the technical field of crop cultivation, in particular to a method for cultivating and preparing soil under the condition that corn straw fully covers the ground surface, which comprises the following steps of: performing time-phased layered operation, namely directly cultivating and preparing a farming layer and a plow pan in autumn of the first year, and changing the distribution state of the straw; and in the spring of the second year, preparing the farming layer within the sowing depth range again before sowing to construct a composite seedbed. The method for cultivating and preparing the soil under the condition that the corn straw fully covers the ground surface is beneficial to water retention and moisture conservation of the soil, the seedbed temperature isincreased, and the crop growth period is prolonged.

The invention discloses a garbage can having a deodorization function. The garbage can comprises an upper box body and a lower box body. An LED display screen is installed on the outer wall of the front of the upper box body, the upper box body comprises a left box body and a right box body, the left box body and the right box body are of an integrally formed structure, the top of the left box body is provided with a first garbage placing opening, the bottom of the right box body is open, the top of the lower box body is open, and the left box body and the right box body are in butt joint with the lower box body. The garbage can has the advantages that the first garbage placing opening can be sealed automatically, the rotting speed of garbage in the garbage can can be slowed down; abnormal smells in the garbage can can be dispersed effectively; and the garbage in the garbage can can be poured into a garbage truck easily.