Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

161results about How to "Increase economic cost" patented technology

Large-sized underwater hoisting structure position posture real-time measuring device

The invention discloses a large-sized underwater hoisting structure position posture real-time measuring device, which belongs to the field of underwater engineering. To be specific, the device adopts a short-base-line acoustic location principle, the time delay of a signal transmitted from three to four acoustic beacons which are fixed on stationary points of the underground hoisting structure to four receiving points of a location matrix is measured so as to calculate the distance from the underground acoustic beacons to the receiving points, the location of the underground beacon can be realized through a circular intersection method, the position and posture of the underground structure relative to the location matrix can be measured through the positions of three to four beacons, then the location matrix is measured through real time kinematic (RTK), so that the position and posture of the underwater structure under a ground coordinate system can be obtained, and the underwater construction can be effectively instructed. Due to adopting the device, different defects by the traditional underwater measuring method adopting a measuring tower way can be effectively solved, the construction time can be effectively shortened while the engineering quality is improved, and the construction range is enlarged.
Owner:BEIJING YINCHUANG TECH

Cooling system of emergency cooling tank and nuclear power plant having the same

The present disclosure provides a cooling system of an emergency cooling tank, which enables long-term cooling without refilling cooling water, in case of the change in a quantity of heat transferred to the emergency cooling tank according to a lapse of time upon an occurrence of an accident of a nuclear reactor, and a nuclear power plant having the same. The emergency cooling tank cooling system includes an emergency cooling tank configured to store cooling water therein, the cooling water receiving heat, transferred from a nuclear reactor or a containment, when an accident occurs in the nuclear reactor, a heat exchanging device installed to be exposed to an outside of the emergency cooling tank to operate in air, and configured to externally emit heat by way of a heat exchange between fluid in the emergency cooling tank and the air such that the operation of the emergency cooling tank is continued even without refilling the cooling water, and an opening and closing unit installed at an upper portion of the emergency cooling tank to be located higher than a water level of the cooling water, and configured to be open by a flow of the fluid generated by an evaporation of the cooling water, the flow being formed due to a pressure difference from external air at pressure higher than a preset pressure, such that some of the fluid is externally emitted when a heat load exceeding a cooling capacity of the emergency cooling tank is transferred.
Owner:KOREA ATOMIC ENERGY RES INST

Zigzag connection soft switching hybrid-type multi-level DC interconnection current transformer

The invention discloses a zigzag connection soft switching hybrid-type multi-level DC interconnection current transformer and belongs to the technical field of intermediate and high voltage DC power transmission and distribution. The current transformer includes a bridge-type chopper, a power electronics capacitance bridge arm and two identical power electronics reactance bridge arms. Two bridge arms of the bridge-type chopper are each composed of two power electronics serial switch blocks connected in series. The positive electrode of the bridge-type chopper is connected to a high voltage positive electrode terminal of the current transformer while the negative electrode is connected to a high voltage negative terminal of the current transformer. The positive electrode of the capacitancebridge arm is connected to the high voltage positive electrode terminal of the current transformer while the negative electrode is connected to the high voltage negative electrode terminal of the current transformer. The positive electrodes of the two reactance bridge arms are connected to middle points of the two bridges arms of the bridge-type chopper respectively. The negative electrodes of thetwo reactance bridge arms are both connected to a low voltage positive terminal of the current transformer. According to the invention, a voltage-transformer-free non-isolation method is adopted forrealizing power conversion of different DC voltage levels, so that all switch devices in the power electronics serial switch blocks realize zero-current current transform soft switching, advantages ofhigh conversion efficiency, low loss, easy implementation of dynamic voltage sharing and high economic cost are achieved.
Owner:TSINGHUA UNIV

Method based on transmission electron microscope common sample table for loading two samples at same time

The invention belongs to the technical field of transmission electron microscopes and discloses a method based on a transmission electron microscope common sample table for loading two samples at thesame time. The method includes: according to different characteristics of pre-test materials, selecting a proper TEM supporting film carrying net, and dispersing a powder sample onto the supporting film carrying net according to a conventional powder sample preparation method for testing; using a blade to cut the carrying film with a prepared sample in halves; utilizing a self-made TEM sample transfer tool to respectively transfer two samples obtained by cutting to left and right sides or upper and lower sides of the sample table, and recording respective corresponding positions; putting the sample table into a TEM, and testing after vacuum reaches testing requirements. The number of sample changing times of the TEM is reduced effectively, time consumption for sample changing and vacuum waiting is reduced, testing efficiency is improved, and testing cost is lowered; the method is good for stability of the sample in an electron microscope, thereby being conducive to acquiring of high-resolution images, and also good for stable running and maintaining of instrument equipment.
Owner:CHONGQING UNIV

In-situ chip fixing structure of transmission electron microscope sample holder

The invention discloses an in-situ chip fixing structure of a transmission electron microscope sample holder. The in-situ chip fixing structure comprises a handheld handle, a sample holder main body, a sample holder head and a vacuum electrical connector, wherein a fixing slot for installing an in-situ chip is formed in the front part of the sample holder head; a non-magnetic pressure plate for fixing the in-situ chip is arranged at the front end part of the fixing slot; a mounting groove is formed in the middle part of the sample holder head; a rotational conductive needle mounting base is arranged in the mounting groove; a non-magnetic conductive needle connected with the vacuum electrical connector is arranged on the conductive needle mounting base; the end part of the non-magnetic conductive needle is connected with an electric contact on the in-situ chip; the tail end of the sample holder head is detachably connected with the sample holder main body through threads; when the in-situ chips with different types are used, the sample holder heads with different sizes only need to be changed, and the whole sample holder does not need to be changed, so that time cost and economic cost of experiments are greatly reduced.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI

Lightweight grouting material for repairing hollowing of wall thermal insulation system and preparation method

InactiveCN112341124AImprove volume stabilityGood empty drum repair and compact effectAluminateCellulose
The invention belongs to the technical field of building materials, and provides a lightweight grouting material for repairing hollowing of a wall insulation system and a preparation method. The lightweight grouting material comprises a ternary cementing material, an auxiliary cementing material, latex powder, cellulose ether, a water reducing agent, an air entraining agent, an antifoaming agent,a water repellent, an expanding agent, lightweight aggregate and quartz sand, wherein the ternary cementing material is formed by mixing Portland cement, sulphoaluminate cement and gypsum, and the auxiliary cementing material is a mixture of titanium slag micro-powder and fly ash. The lightweight grouting material is simple to prepare and convenient to use, and has the advantages of easiness in grouting, good hollowing repairing effect, controllable setting time and operable time, small volume density, no segregation or layering, quicker early strength development, higher strength, high bonding strength with a matrix, no shrinkage cracking problem and the like; the grouting material is suitable for hollowing repair projects of various wall exterior and wall interior thermal insulation systems, and other grouting repair projects with low requirements on compressive strength and high requirements on adhesive properties.
Owner:TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products