199results about How to "Change polarity" patented technology

Monocrystalline silicon solaode chemical etching, washing, drying method and integral processor belong to technique field of chemical etching technique and washing. It characterized in that it not only includes water, acid, alkali, but also ultrasonic participates in etching and washing course: it includes following steps: (1) ultrasonic washes and heats in advance, (2) ultrasonic removes damnification layer, (3) ultrasonic makes herbs into wool, (4) ultrasonic rinses, (5) washing with acid to counteract, (6) ultrasonic rinses, (7) cutting water, (8) hot enthalpy to dry. Positive effects of the invention are: adopting ultrasonic to etch and wash, liquid of making wool can be acted with silicon piece, similar coarseness degree can be generated on surface, perfect pyramid pattern can be obtained; it also eliminates kalium, natrium ion from alkalescent solution, and extends service life of silicon piece; pollution can be decreased, energy consumption and water source can be saved greatly, it is a practical invention.

A portable solar cell charger and methods of charging electronic devices using the same are disclosed. A portable solar cell charger comprises at least one solar cell plate holding a plurality of solar cells; a film with reformed surface formed on the solar cell plate; a power control part supplying a load side with power after perceiving a voltage required from the load side; and a case holding the solar cell plate and the power control part. A method of charging an electronic device using a solar cell charger comprises perceiving a voltage required from a load side using a microprocessor; converting the perceived voltage using D/A converter; comparing the converted voltage with a voltage from a solar cell plate; integrating signals from a comparator and a pulse generator; adjusting the voltage from the solar cell plate; and supplying the voltage from the solar cell plate into the load side.

The invention relates to anticorrosive coating and provides the heavy-duty anticorrosive polyaniline coating with strong anticorrosive property and antifouling and antistatic capabilities, and a preparation method of the heavy-duty anticorrosive polyaniline coating. The heavy-duty anticorrosive polyaniline coating comprises the following raw materials according to weight percent: 8-15% of polyaniline and montmorillonite composite material, 10-15% of mica powder, 10-15% of talcum powder, 15-20% of quartz powder, 30-40% of matrix resin, 0-5% of modified resin, 0-3% of pigment, 0.5-1.0% of defoaming agent, 0.5-1.0% of dispersant, 0.5-1.0% of leveling agent, 0.5-1.0% of film-forming agent and 30-40% of solvent. According to the preparation method, the polyaniline and montmorillonite composite material is prepared firstly through the steps: pretreatment of montmorillonite, in-situ intercalation reaction of polyaniline and synthesis of a polyaniline and montmorillonite intercalation compound; and finally, the heavy-duty anticorrosive polyaniline coating is prepared.

The invention provides a method for preparing special titanium dioxide pigment for plastic sectional materials by a chlorination method, which comprises the following steps that: the chlorination method is adopted for preparing titanium dioxide primary products into slurry, and the pH value of the slurry is regulated to 4.0 to 5.0; phosphate dispersing agents are added; grinding treatment is carried out, then, grinding media is removed, and the temperature is raised; water-soluble silicate solution is added, the pH value of the slurry is maintained between 3.5 and 4.5, amorphous silicon oxide is formed, curing is carried out, and a first covering layer is formed; the pH value of the slurry is regulated to 6.0 to 7.0, curing is carried out, and a second covering layer is formed; aluminum salt solution is added, the pH value is controlled between 7.0 and 9.0, curing is carried out, a third covering layer is formed, the pH value of the slurry is regulated to 6.0 to 7.0, and curing is carried out; the slurry is washed by de-ionized water until the conductivity of filter cake is higher than 15000 ohm*cm, and then, drying and air powder treatment are carried out; modified polysiloxane is added in the air powder process, and a fourth organic covering layer is formed; and materials are recovered through a bag filter. The titanium dioxide pigment prepared by the method provided by the invention has the advantages of high weatherability, high shielding capability, high non-transparency and excellent processing performance in the field of plastic sectional materials.

The invention aims to disclose high-bioactivity ganoderma spore oil and a preparation method thereof, and belongs to the field of Chinese medicament. The method comprises the following steps: breaking walls of ganoderma spore powder by adopting a high-energy nano impact mill, performing dry granulation, supercritical CO2 extraction, molecular distillation and purification, and thus obtaining the ganoderma spore oil. The operation process of the method is carried out in an anhydrous environment, so that oxidation of the spore oil in the processing process is reduced, and the obtained product is stable in property; the freezing transparent test time of the ganoderma spore oil prepared by the method exceeds 5.5 hours; and the measured unsaturated fatty acid content is between 60 and 80 percent, the total triterpenoid content is 2 to 3 percent, the total ergosterol content is 2 to 5 mg/g, the ganoderic acid A content is more than 1 mg/g, the peroxide value is less than 5mmol/kg, and the acid value is less than 10 mg KOH/g.

A chewing gum composition includes at least one biodegradable gum base polymer, at least one sweetener and at least one flavor, the composition having low tack effected by a plurality of side chains attached to the backbone of at least one gum base polymer.

The invention discloses a method and an apparatus for extracting effective components of plants by ultrasonic cooperating with an electrostatic field. The apparatus for extracting effective components of plants by ultrasonic cooperating with an electrostatic field comprises an extraction tank, and is characterized in that is the extraction tank is a rinse tank type cylindrical sound reactor in which a central electrode is arranged, the anode and the cathode of a static generator are electrically connected with the central electrode through a control switch, and the grounded terminal of the static generator is electrically connected with the side wall of the extraction tank. The invention has the advantages of realizing extraction of polar components and nonpolar components, having high extraction rate, short period of extraction and low extraction temperature, avoiding using an entrainer or reducing the amount, and reducing the pollution of the residual of the extractive.

Disclosed is a process for synthesizing benzaldehyde by selective oxidation of toluene, wherein the catalyst mainly comprises manganese, copper, cobalt, ferrum, nickel, zirconium, zinc, Argentine or/and halides of sodium, calcium, potassium, nitrates, sulfates, acetates, benzoates. The preparing process comprises letting in oxygen at the presence of the catalyst. When the conversion rate of toluene is 10%, the selectivity of benzaldehyde is 62%, the selectivity of benzoic alcohol is 14%, the selectivity of benzene carbonic acid is 22%, when the conversion rate of toluene is 39%, the selectivity of benzaldehyde is 20%, the selectivity of benzoic alcohol is 5%, the selectivity of benzene carbonic acid is 73%.

The invention discloses a beta-cyclodextrin polymer adsorbent applicable to adsorption of dye and heavy metal ions, and a preparation method and application thereof. According to the method, modifiedbeta-cyclodextrin, obtained by reaction between a silane-protected beta-cyclodextrin derivative and alkenyl anhydride, and heterocyclic olefinic monomers are subjected to free-radical crosslinking copolymerization to obtain the beta-cyclodextrin polymer adsorbent, wherein the structural general formula is shown in the description. The porous large-specific-surface copolymer can be formed during copolymerization between the modified beta-cyclodextrin and the heterocyclic olefinic monomers, and different adsorption sites are provided for the organic dye and the heavy metal ions, so that the adsorption capacity of the adsorbent can be improved greatly, and the mutual inhibition of the organic dye and the heavy metal ions as wells as the poor removal effect can be relieved effectively.

A technique for utilizing spare bandwidth resulting from the use of a transition-limiting code in a multi-level signaling system is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for utilizing spare bandwidth resulting from the use of a transition-limiting code in a multi-level signaling system, wherein the transition-limiting code has a characteristic such that at least one signal level is periodically unused. The method comprises utilizing the at least one periodically unused signal level in a codeword that has been encoded using the transition-limiting code so as to represent additional information in the multi-level signaling system.

The invention provides electrochemical-membrane separation water-treatment plant and a treatment method thereof. The plant comprises a reaction tank, inside which a membrane module is arranged. The membrane in the membrane module is a conductive membrane. A positive plate is arranged parallel to the membrane module at one side of the membrane module. The membrane module, which is used as a negative plate, and the positive plate are connected with an external power source. The main body of the reaction tank is equipped with a water inlet and a water outlet. An outlet of the membrane module is connected with the water outlet on the main body of the reaction tank. By combining electrochemistry and membrane separation process, polluted water is pretreated by electrooxidation or electric flocculation to form a pollutant filter cake layer, and the membrane module having the conductive membrane is used as the cathode to degrade the pollutant. Thus, membrane pollution is alleviated and the membrane cleaning effect is also achieved, the service cycle of the membrane is prolonged, and service life of the membrane is prolonged. Meanwhile, separation efficiency of pollutants in water is enhanced, and the water quality of effluent is improved.

The invention relates a preparation method of an inorganic-organic hybrid antibacterial agent with antibacterial and hydrophobic functions and application of the antibacterial agent in a polymer material matrix. The antibacterial agent overcomes the problem in the prior art that the antibacterial performance of a natural antibacterial agent cannot completely meet the demands of users when being used alone. Specifically, the antibacterial agent adopts an amino-containing coupling agent as a bridge, and antibacterial inorganic nanoparticles such as titanium dioxide and zinc oxide are coated withantibacterial aldehydes such as organic citral and cinnamaldehyde to form the inorganic-organic hybrid antibacterial agent. The inorganic-organic hybrid antibacterial agent can be widely applied to polymer materials such as PP and ABS and achieve an antibacterial and hydrophobic effect; the antibacterial rate of the antibacterial agent for gram-negative bacteria such as escherichia coli can reach99.9%, the antibacterial rate of the antibacterial agent for gram-positive bacteria such as staphylococcus aureus can reach 99.9%, the antibacterial rate of the antibacterial agent for aspergillus niger and other molds can reach 0 grade, and the contact angle between the material surface and water can reach 120 degrees. Meanwhile, the antibacterial polymer material maintains the great mechanicalproperty.

The invention discloses an initiative electromagnetic control system for slab and girder structure vibration. The initiative electromagnetic control system comprises a mechanical portion and a control portion. The mechanical portion comprises a wall made of nonferromagnetic materials, a slab and girder structure and electromagnets. One end of the slab and girder structure is connected with the wall, a displacement sensor is arranged on the slab and girder structure, and the electromagnets include electromagnets A, B, C and D. The control portion comprises a computer, a power amplifier and a full-wave rectification circuit without a filter. The computer is connected with the displacement sensor, an input end of the power amplifier is connected with the computer, one path of an output end of the amplifier is connected with the electromagnets A and D through a bridge rectification circuit without a filter while the other path of the same is directly connected with the electromagnets B and C. When the slab and girder structure vibrates, magnetic pole polarity and magnetic field intensity of the electromagnets can be automatically changed to attenuate the vibration quickly, so that damages to a mechanical system caused by vibration are reduced.

A method and apparatus for writing timing-based magnetic servo band patterns on magnetic storage media. The apparatus includes a magnetic head and a tri-state driver. The driver is adapted to control three magnetic head states including two writes states having positive and negative current outputs, respectively, for performing a write sequence and a rest state, having no current output for avoiding overwriting of the magnetic pattern between write sequences. The driver is further adapted to gradually change the magnetic head state from a rest state to a write state before beginning a write sequence and to gradually change the magnetic head state back to a rest state upon completing a write sequence. Thus, strong uniform signal pulses are produced upon playback of the magnetic pattern.

The invention provides fusion type Taq DNA polymerase as well as a preparation method and application thereof. The fusion type Taq DNA polymerase comprises a Taq DNA polymerase mutant and DNA bindingprotein, wherein the Taq DNA polymerase mutant is protein obtained by carrying out substitution mutation on one or more sites of a helix-hairpin-helix DNA binding region of wild type Taq DNA polymerase. The fusion type Taq DNA polymerase has enhanced nucleic acid binding capacity, amplification speed and impurity tolerance, has good resistance to inhibition of reverse transcriptase, and has good amplification performance for trace templates, and a biological sample can be directly detected without a nucleic acid extraction step; and a constructed one-step RT-qPCR kit is high in detection speed, high in sensitivity and good in accuracy, and has a wide application prospect in the field of RNA virus detection.

A method and apparatus for changing the polarization of an input signal includes propagating a polarized input signal having orthogonal E-field components by at least one surface each having a respective surface impedance and varying at least one of the surface impedances to shift the phase of one of the components independently from the other so that the polarity of said input signal is changed. Bi-directional propagation is achieved by rotating polarity in one direction but not the other.

The present invention provides a MPO optical fiber cable adapter for connecting with two optical fiber cable connectors, comprising: an outer housing having an axial chamber; two axial ends of the axial chamber having an opening respectively; wherein outer side of the outer housing includes two protruding edges for securing the adapter onto an object; an inner housing disposed inside the axial chamber of the outer housing and having two locking hooks extended from left/right sides of each opening; upper and lower sides thereof having upper and lower inner walls opposite from each other; wherein inner sides of the upper and lower inner walls include upper and lower concave slots respectively; a polarity member attached to the upper and lower concave slots and configured to be detachably replaced by the user to allow the adapter to reveal different polarities; and a dust protective cover firmly attached to the openings.

The present invention discloses a method for driving thin film transistor liquid crystal display (TFT-LCD) and the storage medium for storing computer program representative of the method thereof. The method utilizes a timing controller to send polarity control signals to a plurality of source drivers in a TFT-LCD panel for changing the polarity distribution of the liquid crystal molecules in the panel. The method is characterized by dynamically changing the positions of polarity inversion for alleviating the problem of undercharging under high resolution and high frequency conditions; utilizing both polar and reverse polar driving signals for solving the problem of color shift in “checker board” checking signals; and providing a mechanism for mending the problem of undercharging of the first horizontal line.

Apparatus (200) for driving an LCD display. The apparatus (200) comprises a source driver which is operated between a first power supply rail (VDDH) and a second power supply rail (VSSH). The source driver comprises a power buffer (22) being arranged between the first and the second power supply rails (VDDH, VSSH). The power buffer (22) provides at an output (32) a virtual voltage (VV) of about half the voltage between the two power supply rails (VDDH, VSSH). Furthermore, a P-buffer (20) and an N-buffer (21) are provided. The P-buffer (20) is situated between the first power supply rail (VDDH) and the virtual voltage (VV), and the N-buffer (21) is situated between the virtual voltage (VV) and the second power supply rail (VSSH). The P-buffer (20; 31) is driven at its input side (27) by gamma voltages in an upper voltage regime (VinputP) and the N-buffer (21) is at its input side (28) driven by gamma voltages in a lower voltage regime.

The invention discloses a method for synchronously preparing high-purity cellulose and lignin nanoparticles from wood fibers and application of the method. The method comprises the following steps: (1) adding wood fiber biomass into an organic acid-peroxide mixed solution, performing a reaction at 50-90 DEG C for 1-4 hours, filtering the liquid, and collecting a solid; then adding an organic acid-peroxide mixed solution with the same volume again, performing a reaction for 1-4 hours at the temperature of 50-100 DEG C, and after the reaction is finished, filtering and separating the reaction product to obtain solid residues and liquid, wherein the solid residues are high-purity cellulose; (2) adding ultrapure water into the liquid obtained in the step (1), standing the mixture, and centrifuging the mixture to obtain lignin nanoparticles, wherein the volume ratio of the liquid to the ultrapure water is 1:1-10. The method disclosed by the invention realizes synchronous preparation of high-purity cellulose and nano lignin particles, and the obtained lignin nano particles have a nano effect, uniform particle size distribution and good dispersity.

Occlusion of a vein during IV fluid treatment, in some embodiments, may be detecting by delivering predetermined flow patterns (e.g., flow frequencies and/or amplitudes) of fluid to the subject and monitoring the flow of the fluid downstream vein. A deviation of the flow pattern downstream from the vein from the predetermined flow pattern may be used to determine if an occlusion has occurred. A system for monitoring fluid delivery to a subject includes, in some embodiments, a pump system capable of delivering flow with predetermined flow rates and one or more flow detectors capable of detecting downstream peripheral venous flow.

The invention provides a display device and a driving method of the display panel. Each line of data wire in the display panel is provided with two sub-data wires. The driving method of the invention comprises the steps as follows: firstly, an input image signal is divided into a plurality of image sections; each image section is provided with display data of pixels which are coupled with two adjacent lines of scanning wires; subsequently, every K image sections are divided into a group; then, a reset data is inserted into the image section of each group so as to form an image signal. The display data of the first group is written in by K times according to a first starting waveform; after a given time of the first starting waveform, the scanning wire corresponding to the first group is driven simultaneously according to a second starting waveform; the reset data is output to the first sub-data wire and the second sub-data wire.