TIANJIN UNIVERSITY Patent applications |
Patent application number | Title | Published |
20160130796 | Foldable tubular element with one rigid degree of freedom - A foldable tubular construct/element with one rigid degree of freedom is of a tubular construction formed by a number of single layered annular units which are connected in sequence; each single layered annular unit is of a prism having N ridge lines; two adjacent prisms each having N sides are connected to each other by sharing a polygon with N sides formed on an intersection plane; each prism with N ridge lines is composed of N rigid planar quadrilateral facets; two adjacent single layered annular units comprise N spherical mechanisms formed by the intersections of only four planar quadrilateral facets at each apex; the polygon having N sides formed in the intersection plane of the two adjacent single layered annular units is a planar polygon with an arbitrary number of sides greater than for a triangle; the ridge lines of each prism having N ridge lines are parallel to each other; the connecting ridge lines of the tubular element are coplanar; when the polygon having N sides formed in the intersection plane of the two adjacent single layered annular units is a line-symmetric polygon of even number of sides with at least one diagonal symmetric axis, the plane in which connecting ridge lines of the tubular element are located is perpendicular to one diagonally symmetric axis. | 05-12-2016 |
20160049794 | Electric power router with multiple power supply modes - The present invention belongs to the field of utilization of distributed power generations and smart power management and, relates to an electric power router with multiple power supply modes; it includes a control unit, a communication module, a bidirectional alternate/direct current converter, a switch array, a direct current power line, two alternate current power lines, a power line measuring module, and router ports; wherein, the router ports include a plurality of power source ports and load ports; the switch array includes a single throw switch for grid connection and a plurality of double throw switches, all of which are controlled by the control unit; the direct current power source ports of the router ports are connected to the direct current power line, the direct current power line is connected to the second alternate current power line through the bidirectional alternate/direct current converter; the alternate current power source ports and load ports are connected through two alternate current power lines and the switch array. The present invention enables highly effective and smart management to kinds of power sources and loads, according to the power supplying condition of the power sources as well as the power consumption characteristics and consumption demands of the loads. | 02-18-2016 |
20150377197 | DUAL-CHANNEL PIEZOELECTRIC INJECTOR - The invention discloses a dual-channel piezoelectric injector, including a dual-channel injector body, its bottom in turn is connected with an upper intermediate, a lower intermediate and a dual-channel needle valve body. At the top of the dual-channel injector body there are two tubing interfaces, and each tubing interface has a tubing fuel duct. There are two laminated piezoelectric actuators and two spray fuel ducts connected to two tubing fuel ducts respectively inside the dual-channel injector body. The upper intermediate and lower intermediate connected with each other to form the middle connection body. From top to bottom of the middle connection body, there is an external control fuel duct, an external spray fuel duct, an internal control fuel duct and internal fuel spray duct. Inside the double-channel needle valve body, there is the sleeve structure of the needle valve hole, at the bottom of double-channel needle valve body there is an internal fuel spray nozzle connecting the internal casing hole which is outside the body, and an external fuel spray nozzle connecting to the external casing hole which is outside the body. Through the two laminated type piezoelectric actuators, control is realized for the pressure difference between the fuel pressure of the fuel control cavity and the fuel pressure of the inner pressure chamber or outer pressure chamber. So it is also realized to control the open or close state of the internal or external needle valve, in turn to control the injection action of the internal fuel spray nozzle or external fuel spray nozzle. The present invention has a simple structure and a low manufacturing cost. | 12-31-2015 |
20150355192 | A NOVEL AFFINITY PEPTIDE LIBRARY OF IGG CONSTRUCTED BASED ON PROTEIN A AFFINITY MODEL AND THE APPLICATION OF THE DESIGN METHOD THEREOF - An affinity ligand peptide library of IgG constructed on the basis of Protein A affinity model and the application of a design method thereof According to the Molecular Mechanics—Poisson-Boltzmann surface area (MM/PBSA) method and on the basis of the known human IgG-Protein A complex structure, the hot spots of Protein A that have high affinity for human IgG are obtained analytically, and a Protein A simplified affinity model is built thereof. An affinity peptide library of IgG is constructed including heptapeptide and octapeptide structural modes. On the basis of the peptide structural modes, the types of inserted amino acids that ‘X’ residues represent are further identified using amino acid location method. Then, molecular docking and molecular dynamics simulation methods are used to screen the candidate peptides successively. Finally, the affinity peptide ligands that can effectively purify IgG are identified using affinity chromatography. | 12-10-2015 |
20150318807 | DIRECT TORQUE CONTROL METHOD FOR INHIBITING TORQUE RIPPLES - The present invention relates to a direct torque control method for inhibiting torque ripples, mainly comprising the following steps: establishing an MC voltage vector switching table visually displaying degrees of change in torque and flux, and, proposing, on the basis of the MC voltage vector switching table visually displaying the degrees of change in torque and flux, an MC-DTC mark-to-space ratio computing policy for torque quantification control. The MC-DTC mark-to-space ratio computing policy allows for inhibition of torque ripples of a PMSM speed control system and for a constant switching frequency, uses the MC voltage vector switching table visually displaying the degrees of change in torque and flux, has a simple algorithm, does not reply on motor parameters, and obviates the need for rotational coordinate transformation. | 11-05-2015 |
20150316906 | AN ACTIVE FRONT-END RECTIFIER FILTER DELAY COMPENSATION METHOD BASED ON MODEL PREDICTIVE CONTROL - An active front-end rectifier filter delay compensation method based on model predictive control is disclosed. The method includes following steps: detecting a three-phase grid voltage and three-phase input current sampling value of an active front-end rectifier, and transforming both via Clarke transformation to acquire grid voltage sampling values e | 11-05-2015 |
20150310366 | Security region based security-constrained economic dispatching method - The present invention relates to a power system and provides a method for considering the network security constraints of in the operation of economic dispatch of power systems, which comprises the power flow constraint of branches, the static voltage stability constraint and the transient stability constraint, and provides an effective way for coordinating contradiction between the economy and security of power system operation. The security region based security-constrained economic dispatching method comprises the following steps: step 1, calculating the coefficients for the active power static security region, the cut-set voltage stability region and the dynamic security region respectively; step 2: building the models for security region based security-constrained economic dispatch; step 3: solving the unit on/off state optimal sub-problem through Social Evolutionary Programming; step 4: calculating the generation cost, the static voltage stability margin and the transient stability margin in the dispatching period; step 5: obtaining a feasible economic dispatching scheme, otherwise, return to step 3. The invention is mainly applied in load dispatching optimization. | 10-29-2015 |
20150309092 | Current Pattern Matching Method for Non-Intrusive Power Load Monitoring and Disaggregation - A harmonic-characteristics based current pattern matching method for the non-intrusive power load monitoring and disaggregation is provided in this present invention, on the basis of establishing the load signature database, which comprises electrical appliance registration and load state word space initialization, data acquisition and data preprocessing, feasible state word space search based on table looking-up, the optimal matching of current pattern, and display and output of the monitoring and disaggregation results. The method improves the accuracy of disaggregation, and can achieves exact identification of operating states of appliances, and also can reduce the cost. | 10-29-2015 |
20150247485 | Method for transporting an offshore wind turbine in a floating manner - A method for transporting an offshore turbine in a floating manner is disclosed in which a frame construction is mounted on a deck of a transportation and installation ship; a wind turbine foundation connected to a transition segment is prepared in advance; the transition segment is extended from the frame construction; the wind turbine foundation is temporarily secured with the frame construction; the wind turbine tower, wind turbine head and blades are hoisted in turn and then are assembled to form an entire wind turbine machine; and finally the entire wind turbine machine is conveyed to the installation place. The method for transporting an offshore turbine in a floating manner according to the invention may achieve transporting the entire wind turbine machine in a single step, facilitate easy operation and obtain high success rate. For a huge offshore wind turbine machine, there is also no need for using large hoisting machine and convey ship to perform offshore work and accordingly, the inventive method reduces cost in a great scale compared to prior art technology. Moreover, as the wind turbine foundation, wind turbine tower, wind turbine head, as well as the wind turbine blades may maintain the same attitude throughout the manufacture, transportation and use, risk of causing damage to components of the wind turbine is reduced significantly; thereby assisting in achieving anti-damage requirement for the entire structure and further reducing construction cost. | 09-03-2015 |
20150236741 | Radio frequency front-end based on high-intermediate frequency superheterodyne and zero intermediate frequency structure - The invention discloses a radio frequency front-end based on the high-intermediate frequency superheterodyne and zero intermediate frequency structure, which includes a transmitting module and a receiving module, wherein, the receiving module includes the following devices connected in turn with each other: a transceiving antenna, a low-pass filter, a superheterodyne unit, an IF band-pass filter, a zero-IF unit, a analog-to-digital converter and a digital baseband module of which the output is communicated with the transmitting module. The zero-IF unit includes the following devices which are also connected in turn with each other: a zero-IF mixer, an active low-pass filter and a variable gain operational amplifier of which the output is communicated with the input of the ADC; the inputs of the zero-IF mixer are communicated with the output of the IF band-pass filter and the second LO respectively. The present invention avoids the image interference, improves the system integration and decreases the system consumption. | 08-20-2015 |
20150122376 | Site conditions thick-wall P92 pipe local heat treatment method - The present invention published a large walled field conditions P92 long pipeline local heat treatment processes. Firstly, according to the specific conditions for the on-site grade heat-resistant steel (P92 pipe), combining of the finite element method and test, the Heated Band (HB) width and Gradient Control Band (GCB) was calculated. The pipe was then locally heated using the flexible ceramic resistive heater. When the temperature reaches 80-100° C., the pipe was heated to constant temperature at 80-100° C. for 2 h. The pipe was heated to 300° C. at the rate of 150° C./h. When the temperature reaches 300° C., rising the temperature to 765° C. at the rate of 80° C./h. Holding time is calculated by the wall thickness (5 min/mm, no less than 4 h). Lowering the temperature to 300° C. at the rate of 100° C./h and then natural cooling to room temperature, finally removing the heating device. Finally, the local heat treatment process can be obtained. The present invention can effectively decrease the temperature difference between the outer and inner wall, the residual stress in the welded joints. Thus the service properties can be guaranteed. | 05-07-2015 |
20140368703 | DIGITAL DOMAIN ACCUMULATIVE CMOS-TDI IMAGE SENSOR WITH LOW POWER CONSUMPTION - The present invention relates to the field of design of analog digital hybrid integrated circuit. The object of the invention is to reduce ADC conversion rate thus further reducing power consumption of the sensor while not reducing line frequency of the CMOS-TDI. To this end, a digital domain accumulative CMOS-TDI image sensor with low power consumption is provided. It includes a pixel array of n+k lines multiplied m columns, a column parallel signal pre-processing circuit, a column parallel successive approximation (SAR) ADC, a column parallel digital domain accumulator, a column parallel divider, a timing control circuit and an output shift register, wherein n+k+1 coarse quantification memory units are provided to the column parallel digital domain accumulator for storage of coarse quantification results; and memory units for storage of n times of fine quantification results are also provided, thus realizing n stages of TDI signal accumulation after accumulation of n times of fine quantification results. The invention is generally used in hybrid integrated circuit design. | 12-18-2014 |
20140366729 | Method for Recovering Ethylene during the Process for Producing VAC and a Device thereof - The present invention discloses a method and a device for recovering ethylene during the process for producing vinyl acetate, wherein a double solvent absorption method composed of an absorbent solution and deionized water is adopted. The method is as follows: introducing an outlet stream as an absorbent solution from the upper section of the feeding plate in an acetic acid tower during the rectification stage of vinyl acetate production; delivering same to the top of the lower section of the ethylene recovery tower by a delivery pump; charging refined gas from the tower bottom of the ethylene recovery tower for contacting with the absorbent solution in a counter-current; delivering the absorption bottom solution to the rectification stage for treatment; the gas continuing to rise to the upper section of the ethylene recovery tower and contacting with the deionized water introduced from the top of the tower in a counter-current; absorbing and removing the acetic acid therein; and discharging the residual inert gas, such as N2, from the top of the ethylene recovery tower. The absorbent solution is a mixture of acetic acid, vinyl acetate and water, and comprises by weight percentage of 50-85% acetic acid, 5-30% vinyl acetate and 5-20% water. | 12-18-2014 |
20140303398 | METHOD FOR PRODUCING VINYL ACETATE - The present invention discloses a method for producing vinyl acetate. Inert gas is introduced into cycling gas to improve the explosion limit of oxygen, enlarge a stable area of a reaction system and improve the oxygen concentration of the reaction system, thus reducing the reaction temperature, prolonging the service life of a catalyst, and improving the selectivity of the vinyl acetate. The inert gas is nitrogen or a mixture of nitrogen and methane. The concentration of the inert gas at the inlet of a reactor is 8 to 30 mol %. The molar concentration of the oxygen at the inlet of the reactor is 10.5 to 12 mol %. | 10-09-2014 |
20130261350 | CATALYST FOR HYDROGENATION OF OXALIC ESTER TO ETHANOL, METHOD OF PREPARING THE CATALYST, AND METHOD OF USING THE SAME - A catalyst including: a support, the support including a mixture of SiO | 10-03-2013 |
20130123550 | COPPER HYDROGENATION CATALYST, ESPECIALLY FOR CONVERTING OXALATE TO ETHYLENE GLYCOL, METHOD OF PREPARING THE CATALYST AND APPLICATIONS THEREOF - A copper catalyst for producing ethylene glycol by hydrogenation of an oxalate. The catalyst includes a carrier, an additive, and an active component. The carrier is ceramic or metallic honeycomb. The additive is Al, Si, Ba, Ca, Ti, Zr, Fe, Zn, Mn, V, La, Ce, an oxide thereof, or a mixture thereof. The active component is copper, and the active component and the additive are coated on the carrier to form a coating layer. The additive accounts for 5-90 wt. % of the carrier, the active component accounts for 1-40 wt. % of the carrier, and the copper accounts for 5-50 wt. % of the coating layer. | 05-16-2013 |
20130060007 | METHOD OF PROTEIN REFOLDING WITH ION EXCHANGE RESINS AND THE APPLICATION OF THE SAME - A method for protein refolding using a like-charged ion exchange resins as an additive to facilitate protein refolding. The ion exchange resins mentioned herein includes charged group with the same sign as the target protein to be refolded and the method for refolding an unfolded protein. The method has some advantages described as below: firstly, no new impurity is introduced into the final product of protein due to ion exchange resins used in the present invention is insoluble and easy to remove by settlement or centrifugation, secondly; the key material used in the present invention, ion exchange resins, is easy to recycle after regeneration; thirdly, compared with the refolding method by chromatographic techniques, the current method requires no expensive chromatograph facilities and is simple to perform at lower cost, which is a desirable character for preparative refolding of therapeutic proteins expressed in bacteria as inclusion bodies. | 03-07-2013 |
20130000452 | METHOD FOR PREVENTING WEAR OF MONOCRYSTALLINE DIAMOND TOOLS BY APPLYING MULTIPLE PHYSICAL FIELDS DURING ULTRA-PRECISION MACHINING - A method for preventing the wear of monocrystalline diamond tools by applying multiple physical fields during ultra-precision machining is disclosed, wherein dislocation form of lower energy state will appear by applying different physical fields such as electric field, magnetic field and laser irradiation around the diamond tool so as to change the construction of crystal interface and interfacial energy. Consequently, solid transformation will appear in the materials during the cutting process of nano-scale precision so as to change the cutting characteristic of the materials and prevent the wear of monocrystalline diamond tools during ultra-precision machining The method can be mainly used for ultra-precision machining | 01-03-2013 |
20120304624 | NON-STOICHIOMETRIC PEROVSKITE OXIDE OXIDATION CATALYST FOR OXIDIZING NO TO NO2 - A non-stoichiometric perovskite oxide having the general chemical formula La | 12-06-2012 |
20110250664 | YEAST HAVING IMPROVED ETHANOL YIELD - The present invention provides for a genetically-altered haploid yeast cell characterized by reduced activity or expression of FPS1, reduced activity or expression of glycerol-3-phosphate dehydrogenase-1 (GPD1), reduced activity or expression of glycerol-3-phosphate dehydrogenase-2 (GPD2), and increased expression of glutamate synthase (GLT1), wherein the reduced activity or expression, and the increased expression, is relative to expression or activity in a wildtype yeast strain, e.g., | 10-13-2011 |
20090162167 | Wire staple for attaching metal sheets - A staple for attaching together first and second metal sheets is made of a length of round wire bent at the ends to form spaced apart depending metal legs, each having a metal piercing point at the end thereof adapted to pierce completely through the first sheet and at least partially through the second sheet and also adapted to spread the legs further apart during the piercing to a spread position in which the legs are anchored within the metal sheets and thereby attach the metal sheets together. The metal piercing points each having an outside bevel surface on the outside of the leg, an inside bevel surface on the inside of the leg, and a blunt end surface between the inside and outside bevel surfaces. | 06-25-2009 |