155 results about "Double-time" patented technology

The invention discloses a method for preparing a dense enhancement type ceramic membrane based on micro-arc oxidizing and laser remelting, and relates to a method for preparing a dense enhancement type ceramic membrane on the surfaces of light metals such as magnesium, aluminium and titanium and other alloys. The method is used for solving the problems that a micro-arc oxidizing surface treatment technology for preparing the dense enhancement type ceramic membrane on the surfaces of light metals such as magnesium, aluminium and titanium and other alloys cannot have low energy consumption and high membrane performance at the same time. The method comprises steps of: 1, pretreatment of basic materials; 2, working liquid preparation treatment; 3, micro-arc oxidation; and 4, laser remelting treatment of the micro-arc oxidation (MAO) membrane, and thus obtaining a sample piece of the dense enhancement type ceramic membrane. The prepared membrane has good binding force with a base body, dense tissues, low porosity, high hardness and good corrosion resistance and wear resistance; and the porosity of the membrane can be reduced to below 3%, the harness number can be improved by double times of the original MAO membrane which is not subjected to laser remelting treatment. The method can be used for preparing the dense enhancement type ceramic membrane on the surfaces of light metals such as magnesium, aluminium and titanium and other alloys.

The invention belongs to the wireless communication technology field, in particular relates to a double time slot interleaving iterative multi-user communication method based on the network coding cooperative relay. The method adopts a wireless relay system model, communication nodes are divided into a target user node, an interference user node, a relay node and a base station node; the relay node is provided with a baseband processing module, and carries out network coding to relay data; and in addition, a base station receiver utilizes the interleaving iterative interference elimination improvement algorithm of double time slot network coding to carry out the multi-user signal detection. The method can provide space diversity gain for the base station of a receiving terminal and reducepath loss, can realize higher transmission reliability compared with the traditional multi-user system, and synchronously can reduce the time of relay transmission and improve the system capacity.

The invention discloses a low-voltage traversing control method for a double-fed wind power generation system. The method comprises the following steps of: 1) detecting zero frequency transient flux component of a motor; 2) when the motor has zero frequency transient flux component outburst, controlling a rotor current transformer and a network current transformer, and attenuating the zero frequency transient flux components of the current transformers; and 3) controlling torque current and power grid reactive compensation current to inhibit the growth of harmful voltage and prevent the formation of harmful current. The method can really realize the elimination of the transient flux caused by sudden decline and sudden rise of a stator voltage and inhibit negative sequence current so as to avoid offline of the fan power generation system at the same time of protecting the rotor current transformer and the network current transformer; meanwhile, by the method, double times ultrahigh dangerous voltage of rotor induction caused by zero frequency transient flux superposition when the voltage is recovered can be prevented, and power grid-friendly intelligent low-voltage traversing is realized.

The invention discloses a serum-free animal origin-free culture medium for suspension culture of BHK-21 cells and a preparation method of the serum-free animal origin-free culture medium. According to the serum-free animal origin-free culture medium for suspension culture of the BHK-21 cells and the preparation method of the serum-free animal origin-free culture medium, through the addition and component optimization of amino acids, inorganic salt, vitamins, lipids, hydrolysates and the rest of additives in the culture medium, the multiplication speed of the BHK-21 cells is remarkably improved, the doubling time is shortened, and the high activity is maintained while the cells reach higher growth density. The culture medium is suitable for high-density suspension culture of the BHK-21 cells, low in cost, free of serum, free of animal origins and low in protein, the biological function of the serum is completely replaced through the addition of the ingredients including the lipids, the vitamins, the microelements, recombinant protein and the hydrolysates,, and some negative effects caused by the serum to later purification and separation of an antigen are avoided. Through optimization on the components of the culture medium, the multiplication speed of the BHK-21 cells in suspension culture is higher, the cell density is higher, the cell activity is higher, and the BHK-21 cells are more suitable for large-scale industrial production.

The invention belongs to the technical field of wine brewing and particularly relates to mild thick-flavor white spirit and a production method thereof. A brewing technique of the mild thick-flavor white spirit comprises the following steps: feeding raw materials for the first time; roughly treating the raw materials; feeding the raw materials for the second time; treating the raw materials; fermenting grains after the first to six wine taking in turn, and taking wine; double times of feeding, one time of raw material treatment, nine times of fermentation, ten times of stewing and seven times of wine taking are performed during one production period. The brewing technique is characterized in that in comparison with traditional thick-flavor white spirit, the mild thick-flavor white spirit disclosed by the invention is characterized in that the crushing rate of fed broomcorn, the amount of used yeast for preparing hard liquor, the amount of used grain wetting water and the stacking fermentation temperature are regulated; no pit bottom liquor is generated during production; the yield and the labor productivity are increased; the grain consumption and the energy consumption are reduced; the sour and bitter tastes of first and second produced wine, and the burned food taste of six and seven produced wine are reduced; the wine is mild, mellow, elegant and smooth in style, remarkable in thick flavor, and lasting in tail taste, and the fragrance can be retained in an empty cup for a long time.

The invention relates to a process for producing ginkgo extract and belongs to the technical field of plan extraction. The process comprises the following steps of: adding ginkgo leaves serving as raw materials into 50 to 70 percent ethanol of which the weight is eight times that of ginkgo leaves serving as the raw materials to perform leaching three times, wherein the leaching temperature is 70 DEG C; collecting extracting solution, evaporating the extracting solution under vacuum, recovering ethanol, centrifuging the extracting solution and collecting supernatant solution; and subjecting the extracting solution to the centrifugal treatment by a macroporous resin chromatographic column of which the diameter-to-height ratio is 1:10, leaching the extracting solution in turn with 5 to 15 percent ethanol until the eluate is clear and bright, desorbing the extracting solution with 75 percent ethanol, after desorption, collecting desorbing solution, allowing the desorbing solution to pass through a macroporous resin chromatographic column of which the diameter-to-height ratio is 1:30, collecting the desorbing solution, decompression-recovering ethanol, condensing the desorbing solution into thick paste, and vacuum-drying the thick paste to obtain the ginkgo extract. The process adopts multiple leaching and multistage centrifuging, and also adopts a double-time desorbing method of coarse extraction and refined extraction, so that the contents of the active components are greatly improved; and the ginkgo extract with different ratios of active components can be prepared as required.

The invention discloses an encryption parameter transmitting method of wireless communication terminal equipment. The method comprises a process that a wireless digital mobile terminal initiates encrypted voice communication during a certain independent time slot among TDMA (Time Division Multiple Address) time slots and a process that a double time slot wireless mobile terminal receives the encrypted voice communication during a certain independent time slot among the TDMA time slots. By adopting the method, the existing voice load channels are not occupied, restrictions on encryption parameter bit width are also reduced, so that an encryption method with better voice quality and higher security can be provided, and further the safety performance of the double time slot terminal equipment is improved.

The invention discloses a method for producing glutamic acid through double-feeding fermentation optimization of corn steep liquor and glucose, which comprises the following steps of: in fermentation culture of glutamic acid, initially adding 1-10g/L of glucose to a fermentation culture medium, and initially adding 1-10g/L of corn steep liquor; after the fermentation culture starts, starting feeding the corn steep liquor and glucose at the same time, wherein 5-19g/L of corn steep liquor is fed and completely added within 5-10 hours since the fermentation starts, and the total amount of the corn steep liquor is 15-20g/L; feeding the concentrated solution of glucose until the fermentation is over; maintaining the amount of residual sugar in the fermentation culture medium at 0.05-10g/L; and controlling the pH value of the liquid ammonia in the whole process of fermentation to 6.8-7.3. The method disclosed by the invention effectively increases the growth speed of thalli and shortens the adaptation period in the initial stage of thallus fermentation and the thallus doubling time, thus shortening the overall fermentation time and reducing the overall production cost of glutamic acid.

The invention discloses a two-dimensional code-based offline payment method. According to the method, asymmetric keys are adopted to issue certificates, so that the identity information of users is prevented from being forged and tampered; the asymmetric keys are managed by account issuers, so that the safety rights and interests of the account issuers are ensured; a terminal can realize the support for a plurality of account issuers and keep the simplicity and invariability of programs by adoption of a dynamic public key list updating manner; and a double-time stamp mechanism is adopted, one time stamp key is controlled by terminal operators and is used for preventing replication, and the other time stamp key is controlled by the account issuers and is used for preventing the terminal operator from forging transactions.

This invention is a carbon active agent for the lead acid battery. The size of the particles of the carbon powder is less than 15 m. The active agent has an excellent electro-conductive property. The carbon active agent is poured into the lead battery for use, and the particles of the carbon powders are absorbed onto and osmosed into the positive electrode plate by means of the electricity to form a conductive membrane with a huge surface area and new base cores. It makes the battery (1) be charged in a large current and discharged in the current as double times or more as the nominal current with the temperature of the battery being within a standard range, (2) have decreased internal resistance, (3) prolong its using life by double times or more, (4) revive a battery if it was wasted.

The invention discloses an SOC and SOH joint estimation method, which comprises the following steps: obtaining a training sample set by using data measured by an experiment, wherein each training sample in the training sample set comprises average SOC, environment temperature, current, accumulated charge quantity and corresponding SOH; training a BP neural network to estimate SOH based on the training sample set; and estimating the SOC by using the UKF algorithm every first preset time based on the present SOH, and when the total time reaches second preset time, estimating the SOH by using theneural network on the basis of the environment temperature and current acquired by the current sensor and the SOC and accumulated charge quantity acquired by the SOC estimation algorithm, thereby realizing the joint estimation of the SOC and the SOH. According to the invention, the coupling relationship between the SOC and the SOH and the influence of various aging factors (such as temperature, current and the like) are fully considered in the estimation process of the SOC and the SOH; meanwhile, double-time estimation is adopted according to the change speed difference of the SOC and the SOH, the calculation efficiency is improved on the premise that the estimation precision is not reduced, and intelligent recognition can be well carried out.

A weighted fraction Fourier transform domain double-time-slot diversity and multiplexing cooperated transmission method belongs to the field of wireless communication technology. The method settles aproblem that diversity gain and multiplexing gain cannot be realized in an existing single-antenna system. The method utilizes double-time-slot expansion and weighted fraction Fourier technology. Through expanding a single-time-slot signal to double time slots, fraction domain calculation and transmission are successively performed, thereby realizing diversity gain and multiplexing gain in the single-antenna system. In the method of the invention, a receiving end can receive multiple data signals through de-multiplexing, thereby supplying higher user accommodation amount to the system, and realizing relatively high integral system performance. The method according to the invention can be applied to the field of wireless communication technology.

The invention relates to an intelligent desktop 3D printer based on the Internet of Things. The intelligent desktop 3D printer comprises a base, two stand columns, a cross beam and a printing mechanism, wherein the two stand columns are vertically arranged on the base and located at the two ends of the base; the cross beam is erected at the top ends of the stand columns; and the printing mechanism is arranged below the cross beam. It can be guaranteed that a user can remotely operate and control the intelligent desktop 3D printer based on the Internet of Things through a wireless communication module, so that intelligence of the printer is realized. Two feeding assemblies can conduct uniform and regular feeding through a driving wheel, and reliability and accuracy of material addition are realized, so that the printing reliability of the printer is ensured. Meanwhile, the feeding quantity can be further accurately controlled through a timing module, and accordingly the reliability of the printer is further improved. Besides, a double-time-base integrated circuit is adopted as a timing circuit and has the characteristics of stable performance and low price, so that the production cost of the printer is reduced, and the market competitiveness of the printer is improved.

The invention relates to a method for accurately estimating the Doppler rate in a large-strabismus SAR imaging mode. The method comprises the steps that 100) distance walk compensation, distance bending correction and secondary distance compression are implemented on echo data to obtain a double-time-domain signal which is compressed in the distance direction; 101) a dechirp processing is implemented on the distance compressed data in an orientation time domain by utilizing a reference function Sdechirp(t); 102) FFT (Fast Fourier Transform) is implemented on the orientation direction data to change the data from the orientation time domain to an orientation frequency domain; 103) a special display point is selected from each distance door in a maximal energy method, the orientation-direction position of the point is estimated, and a compensation function Scomp(t) of each special display point is calculated according to the orientation-direction position; 104) windowing is implemented, data within the main fuzzy width of the special display point selected from each distance door is reserved, and data which has no contribution to estimation of the Doppler rate is abandoned; 105) reverse Fourier transformer is implemented, and space change phase is compensated in the orientation time domain; and 106) the Doppler rate is estimated in a classic MD algorithm.

A method and apparatus is provided for clamping of an electrostatic discharge using multiple time-constants. A rise in a voltage level is detected. A first time-constant is provided to determine whether the rise in the voltage level is caused by an electrostatic event. A clamping function is provided to clamp the voltage level in response to a determination that the rise in the voltage level is caused by the electrostatic event. A second time-constant is provided to provide a time period for maintaining the clamping function for a period of time to substantially extinguish the electrostatic event.

The invention discloses a high voltage NMOS using the tagma double-times doping way, wherein the second time doping is performed by the self-alignment and the step phenomenon in the channel is eliminated and the device performance is increased.

The invention discloses a recovery processing device for producing polyether polyol, and belongs to the technical field of the polyether polyol production. The recovery processing device comprises a material storage tank. The top of the material storage tank is uniformly provided with a fixing block. The top of the fixing block is provided with a stirring box. Middle positions of the stirring boxand the material storage tank are provided with a through pipe. The outer wall of the front side of the through pipe is provided with a control valve. The left side of the top of the stirring box is provided with a feeding port. The outer wall of the right side of the stirring box is provided with an outer protective housing. A cavity of the outer protective housing is provided with a servo motor.The output end of the servo motor is connected with a stirring shaft. The outer wall of the stirring shaft is uniformly provided with a stirring rod. Double times of grinding is performed on the solid polyether polyol, so the solid polyether polyol can be more uniformly ground, and the ground polyether polyol is sieved, so falling of a material is convenient. A material storage box can be individually taken out from the material storage tank, so the material can be adequately mixed with a catalyst, and a finished product is conveniently taken out.

The invention discloses a processing method of camellia red tea and relates to the field of tea processing. The processing method comprises the following steps: picking fresh leaves and camellia; withering the fresh leaves and the camellia in a withering tank; rolling the withered leaves and the withered camellia in a rolling machine; fermenting in a fermentation room; drying the fermented tea and camellia in a drier; finally flavoring the dried tea and camellia in a flavoring machine. According to the processing method disclosed by the invention, three times of flavoring and double times of cooling are adopted especially in the flavoring step, so that the processed red tea is red, transparent and bright in tea soup, has the fragrance of the camellia and is mellow, normal and thick in taste.

The present invention is double time phase protamine zinc insulin injection (30 %) and its preparation process, and belongs to the field of medicine preparation technology. The double time phase protamine zinc insulin injection (30 %) consists of insulin 100000 IU, isosmotic agent 35-45 g, preservative 5.5-7 g, pH regulator 12-12.5 g and fish protamine sulfate 0.21-0.42 g, and has pH value of 6.9-7.8. Its preparation process includes the steps of preparing neutral insulin injection, preparing low protamine zinc insulin injection, and mixing these two kinds of injection. The double time phase protamine zinc insulin injection (30 %) has two forms of insulin, including one in solution for quick acting and the other in precipitate with combined fish protamine sulfate as the middle acting phase. It has less required injection times.

The invention discloses a robust self-adaptive sliding-mode control method for a flexible-hinge space station manipulator. The robust self-adaptive sliding-mode control method comprises the followingsteps: first, through the utilization of Lagrangian methods of the second kind and through the combination with the system momentum and momentum moment conservation relation, analyzing and establishing a system dynamics model of a flexible-hinge space station manipulator system, wherein the carrier position and attitude are both uncontrollable; next, for the actual situation that the flexibility of each joint hinge is relatively high in the actual application of the space station manipulator, exporting a singular perturbation mathematical model applicable to the control system design through the introduction of a joint flexibility compensation controller and through the combination with double time scale decomposition of singular perturbation theory; and then, through the utilization of the singular perturbation mathematical model, decomposing the flexible-hinge space station manipulator system into a fast subsystem and a slow subsystem which are independent of each other, designing the robust self-adaptive sliding-mode control for the slow subsystem, and designing a moment differential feedback controller for the fast subsystem. Consequently, the control purposes of not only eliminating the negative impact of the flexibility of a flexible hinge on the positioning precision and the stability of the space station manipulator but also effectively overcoming the buffeting defect in the conventional sliding-mode control can be fulfilled.