Abstract: Solar electroosmosis power generation devices and methods thereof are disclosed. In some embodiments, a first electrode in transparent inorganic electrolyte solution is provided in a first temperature chamber including a first light-transmitting wall. A second electrode in transparent inorganic electrolyte solution is provided in a second temperature chamber including a second light-tight wall. The first and second temperature chambers are connected by a cation nano-film with nanoparticles on its surface close to the first temperature chamber. An external circuit connects the first and second electrodes. When the nano-film is irradiated through the first wall by sunlight, the temperature of the first temperature chamber is higher than that of the second temperature chamber. In some embodiments, the solar electroosmosis power generation device improves solar energy utilization efficiency, and can be used in the field of solar light-heat-electric conversion.

Abstract: An arc fault detection method for a photovoltaic system based on an adaptive kernel function and instantaneous frequency estimation includes steps of: sampling signal xt in a time window length of TNCT and obtaining an iterative time-frequency diagram of xt by nonlinear chirplet transform; extracting detection variables based on frequency component in the selected iterative time-frequency diagram to determine a moment when spectrum energy increases; when the moment is found, obtaining a matrix distribution form of the xt in time-frequency domain obtained by the adaptive optimum kernel time-frequency representation, and processing the matrix with sum of squares in a time dimension to obtain a column vector; processing each selected frequency bands with integration operation in a frequency dimension to obtain multiple detection variable values as inputs of a well-trained Naive Bayes model.

Abstract: A method for simultaneously determining fat-soluble vitamins and carotenoids in serum, and belonging to the technical field of analytical chemistry, includes an ionic liquid (IL) or a binary mixed solvent composed of an IL and another solvent is adopted as an extractant; the biological samples are pre-treated by liquid-liquid extraction (LLE) and then detected by high-performance liquid chromatography (HPLC); retinyl acetate and trans-?-apo-8?-carotenal are adopted as the internal standards for fat-soluble vitamins and carotenoids, respectively; and the internal standard method is adopted to establish standard curves for quantification based on the retention time and the UV-Vis absorption spectrum. Compared with the existing methods, in the disclosure, the pretreatment process is simple and easy to be conducted, the sample can be prepared in a short time, and the toxic and harmful organic solvent is used at a reduced amount.

Abstract: The present disclosure discloses a liquid arc extinguish chamber for direct current breaking. The liquid arc extinguish chamber for direct current breaking includes a cavity, a fixed contact and a moving contact. A liquid medium is sealed in the cavity. The fixed contact is hermetically fixed in the cavity. One end of the fixed contact is fixed in the cavity, and the other end of the fixed contact is connected with an outlet terminal A1. The moving contact is movably sealed in the cavity. One end of the moving contact may adjacently abut against or be in contact with the fixed contact, and the other end of the moving contact is connected with an outlet terminal A2.

Abstract: A control system and method for dry centrifugal granulation of liquid slag are provided. The control system includes a granulator cold-air control unit and a feeding unit. The granulator cold-air control unit includes a granulator, a rotating shaft, a motor, and a cold-air supply unit. The granulator is fixed to the motor; the cold-air supply unit includes a shaft cooling air channel and an annular cooling air channel; the shaft cooling air channel consists of an inner duct sleeve and a shaft sleeve; the annular cooling air channel consists of the inner duct sleeve and an outer duct sleeve arranged at periphery of the inner duct sleeve, which have different external diameters; the feeding unit includes a slag dropping pipe arranged above the granulator; a sliding gate is arranged at a lower section of the slag dropping pipe, and an accident diversion spout is equipped.

Abstract: A control method for optimizing a solar-to-power efficiency of a solar-aided coal-fired power system under off-design working conditions is provided. Through reading the relevant information of the solar collecting system, the coal-fired power generation system, the environmental conditions, and the working conditions of the solar-aided coal-fired power system, the water flow rate range able to be heated by the solar collecting unit and the solar-coal feedwater flow distribution ratio range are determined; through establishing the relationship between the solar-to-power efficiency and the solar-coal feedwater flow distribution ratio, the solar-coal feedwater flow distribution ratio is regulated, so that a flow rate of water entering the solar collecting system to be heated is controlled, thereby maximizing the solar-to-power efficiency and improving the economy of the solar-aided coal-fired power system.

Abstract: An image preprocessing module is provided by the present invention to pre-process pathological images through superpixel segmentation in the cloud infrastructure, and meanwhile stores the boundary thereof by using the binary image; and performing multi-user data recording by the data recording module, so that the user can collaborate on image annotation; through the front-end interaction module, the capturing action of the user and displaying the pathological image; through the back-end processing module, the responding to the request sent by the front-end interaction module and completing the annotation of the data and the suggesting possible annotation sub-regions to the users. Through the effects achieved by the above modules, the present invention accomplishes the purpose of multi-user collaborative and convenient pixel-level annotation on pathological images via a webpage.

Abstract: A surface treatment method of metallic materials provided by the present invention includes steps of: (S1) cleaning a surface of an initial metallic material to be treated, and then drying; and (S2) placing the dried metallic material in a heating furnace, adjusting a vacuum degree inside the heating furnace to a preset value under the protection of a mixed flowing gas of oxygen and an inert gas, heating and preserving, cooling to room temperature by furnace cooling, and completing the surface treatment of the metallic material to be treated, wherein the heating temperature is larger than the destruction temperature of the native oxide at the surface of the initial metallic material. The present invention is able to increase the surface hardness of the metallic material within a large depth, and has the advantages of low processing cost, high efficiency, good controllability, convenient operation and low surface contamination for the workpiece.

Abstract: An inlet collector for a centrifugal fan and a centrifugal fan are provided. By arranging a tragus-shaped section in a guiding section, reverse flow caused by intersection of inlet leakage flow at a volute tongue side and inlet airflow is blocked by the tragus-shaped structure in movement process, and the leakage flow no longer collide with the inlet airflow. An inner curved surface of the tragus-shaped section controls backflow to change smoothly along an inner wall surface of the tragus-shaped section and re-enter a volute for circulation. A tragus profile is adopted to guide the airflow to change more smoothly in the velocity direction near the wall of the guiding section, so as to effectively reduce the impact of the inlet airflow on the guiding section. By using the inlet collector, energy loss of airflow is reduced, vortex formation is suppressed, and aerodynamic performance and fan noise are improved.

Abstract: A power generation device and method using organic working fluid for circulation without pump and valve are invented, the principle is able to be called flash jet natural cycle. The flash injection tube, the magnetic sphere motion tube and the storage tank are connected to form the main loop. The finned tube and the storage tank are connected to form the cooling loop. The working fluid is heated in the flash injection tube by low-temperature heat source, and is cooled in the finned tube by air or water. The gravity and flash force jointly drive the flash jet natural cycle. The lower magnetic ball acts as a one-way valve for supplying liquid to the flash injection tube. The upper magnetic ball acts as a valve and a rotor driven by the flash force and gravity to move linearly and produce electricity.

Abstract: The present application discloses an early warning method, device and system of sudden death. The method includes: 1. extracting 6 indicators of 4 types of physiological information 2. performing abnormality detection on the physiological information and calculating an early warning level, proceeding to step 3 when a result of the abnormality detection indicates abnormal, and continuing the abnormality detection when the result of the abnormality detection indicates normal; and 3. producing sound, light and vibration alarms, in which an alarm device is driven to produce sound, light and vibration and provide a corresponding early warning level. A higher early warning level indicates a higher risk of sudden death.

Abstract: A control method for optimizing generated power of a solar-aided coal-fired power system under off-design working conditions sets maximizing generated power without changing main steam flow rate as a control goal. A solar-coal feedwater flow distribution ratio is adjusted to adjust water flow rate heated by a solar heat collection system, so as to achieve the control goal. Control steps include reading relevant information; calculating the water flow rate range heated by the solar heat collection system, and an applicable solar-coal feedwater flow distribution ratio range; establishing a correspondence between the generated power and the solar-coal feedwater flow distribution ratio within this range; selecting a solar-coal feedwater flow distribution ratio corresponding to the maximum generated power; and adjusting the water flow rate entering the solar heat collection system to an optimized value. The present invention can flexibly control the solar-coal coupling and improve the economy.

Abstract: An optical fiber laser induced breakdown spectroscopy detection device and a detection method are provided. The device comprises an optical fiber LIBS detector and a master control detection system. The master control detection system is installed in the master control room of a nuclear power plant, and the optical fiber LIBS detector is configured to perform detection in a pipeline. The master control detection system and the optical fiber LIBS detector are connected to each other via the transmission optical fiber and the control signal line. The remote on-line detection of the positioning and fixed point of the designated area of the inner wall of the main pipeline of the nuclear power plant can be detected on line in the master control room of the nuclear power plant.

Abstract: A thermal management system for a hybrid vehicle includes an expander, a heat exchanger, a condenser, a water tank, a pump, a heat exchanger for a battery pack, a heat exchanger for a motor, a water cooling jacket for an engine, an exhaust gas heat exchanger for an engine, a valve, and so on. According to the present disclosure, in thermal management loops, different operating modes of the system can be switched by controlling the open-close and opening of the valve. In this way, a series/parallel connection of thermal management branches of an electrical system and an engine system is fulfilled to meet the requirements for heat dissipation and preheating, and flux in each branch is regulated to fulfill thermal management according to different driving conditions of a hybrid vehicle.

Abstract: The present disclosure discloses a system and a method for solar-driven photothermal seawater desalination and ion electroosmosis power generation. In the system, a first reservoir is provided with a first electrode immersed in seawater; a second reservoir is connected to the first reservoir via a cation selective nanofilm; a third reservoir is provided with a second electrode immersed in seawater, and the third reservoir is connected to the second reservoir via an anion selective nanofilm; and an adjustable sun-visor shields the cation selective nanofilm to form a first preset part of solar illumination and shields the anion selective nanofilm to form a second preset part of the solar illumination. Therefore, the cation selective nanofilm and the anion selective nanofilm are each under an asymmetric illumination to generate a temperature gradient.

Abstract: An inner roller feeding device for a baseplate of a counter-roller driving power spinning equipment includes an inner roller column, an inner roller top plate, an inner roller upper plate, an inner roller lower plate, a cam, a cam mounting cylinder, inner rollers, inner roller shafts, a feed screw, a servo motor and a baseplate. According to the inner roller feeding device, a brake motor serves as a power source, the inner roller is driven by the cam through a worm gear drive to feed along a radial direction of a workpiece, such that an inner roller mechanism is small in size, large in adjustment range and high in positioning precision.

Abstract: The present invention discloses an experimental device for cavitation corrosion of liquid metal, comprising a stand, and a vibration device and a lifting and rotating device separately arranged on the stand, wherein a heating device for experimental use is arranged on the vibration device; a furnace lid with a sealing ring is arranged above the heating device; a stirring mechanism is arranged on the furnace lid; the stirring mechanism is connected to a chunk below the furnace lid; a clamp is connected below the chuck, and the clamp is connected to a sample; the furnace lid is connected to the lifting and rotating device; the lifting and rotating device can control the movement of the furnace lid so that the sample is placed in the heating device; the lifting and rotating device, the stirring mechanism, the heating device and the vibration device are connected to a control system.

Abstract: A powder-enhanced friction stir rivet welding device includes a friction stir rivet welding spindle, a C-shaped frame and a tooling platform. The friction stir rivet welding spindle includes a rotating mechanism, a feed mechanism, a vibration-rotation mixing mechanism and a powder feeding mechanism. The friction stir rivet welding spindle is configured to realize rotation and feed movements of a rivet and feeding and mixing of a powder. The C-shaped frame is configured to fix the friction stir rivet welding spindle and the tooling platform. The tooling platform includes a force sensor, a sensor indenter, a tooling mould and a tooling platen. The tooling platform is configured to clamp a workpiece to be riveted and welded, and measure a rivet welding force of the friction stir rivet welding spindle in real time.

Abstract: A full-electric servo vertical three-counter driving power spinning device includes a rack, and the rack includes a baseplate. A workpiece active rotating mechanism and an inner roller feeding mechanism are provided on the baseplate, an outer roller feeding mechanism is provided on the rack; the outer roller feeding mechanism is provided with an outer roller active rotating mechanism; the outer roller active rotating mechanism includes an outer roller active rotating motor and an outer roller, and the inner roller feeding mechanism includes an inner roller. A stress state of a cylinder material by adopting a combined method of an active rotation of a roller and an active rotation of a workpiece turntable is significantly different from that by a passive spinning of a counter-roller, thus improving a thinning rate of a wall thickness of a cylindrical member and a hardening properties of materials.

Abstract: A high voltage relay resistant to instantaneous high-current impact is disclosed. The high voltage relay includes an electromagnet system, a control system, a contact system, and a base support. In various embodiments, an electromagnetic force generated by the contact system is used to resolve a problem of contact separation caused by an electric repulsion force generated by an instantaneous high-current.