Abstract: The invention discloses a broadband dual-band base station antenna array with high out-of-band isolation, having at least one high-frequency antenna unit, one low-frequency antenna unit and a floor; when there is one high-frequency antenna unit, it is placed on one side of the floor; when there are more than one high-frequency antenna units, they are placed on both sides of the floor. The high-frequency antenna unit includes multiple dipole arms and a balun, wherein the dipole arms are connected by distributed inductor and fed through the balun; the low-frequency antenna unit including multiple dipole arms and a balun is placed on the middle of the floor, wherein the dipole arms are connected by distributed capacitor and fed through the balun. The balun is provided with a feeder and a H-shape microstrip line. The H-shape microstrip line connects with the feeder.

Abstract: Disclosed are an adaptive RLS decision feedback equalizing system, characterized by comprising: an error code cross-correlation module, an equalization module, a decision feedback unit, a coefficient updating unit and an autocorrelation estimation module. Also disclosed are an implementation method of the adaptive RLS decision feedback equalizing system, comprising the following steps: 1) setting an initial value of c0 for a filtering coefficient; 2) generating a filtering output signal yk; 3) computing an error code cross-correlation result Ik; 4) updating the filtering coefficient ck?1 to ck; 5) updating an autocorrelation inverse matrix estimation result Pk?1 to Pk according to a forget constant factor w and an equalizer input signal sequence rk; 6) repeating step 2) to step 5), until the equalizer coefficient converges.

Abstract: Disclosed is an underwater source node positioning method, which includes the specific steps: (1) placing distributed underwater receiving nodes, the source node transmitting a pulse signal, and the receiving nodes receiving the pulse signal sent by the source node; (2) processing the signal of each receiving node; (3) according to a multipath signal received by each receiving node, performing parameter estimation of the position of the source node, specifically: (3-1) calculating a path length of each path; (3-2) calculating a delay difference between each path and a direct path; (3-3) calculating the signal received by each receiving node; (3-4) performing mesh search matching to obtain the position of the source node. Compared with the conventional method, the present invention requires fewer receiving nodes and does not require accurate clock synchronization of signals. The present invention utilizes multipath signals propagated by signals to enable more accurate positioning of the source nodes.

Abstract: A multi-wavelength single-frequency optical fiber laser source for a laser radar system includes a resonant cavity composed of a high-reflectivity chirped optical fiber grating, a high gain optical fiber and a low-reflectivity chirped optical fiber grating, a single-mode semiconductor pump laser served as a pump light source, an optical wavelength division multiplexer, an optical coupler, an optical isolator, an optical circulator, an optical filter module, and a semiconductor optical amplifier. The pump light source performs optical fiber core pumping with respect to the high gain optical fiber. A portion of the wide-spectrum laser is filtered by the optical filter module to obtain a wavelength corresponding to a specific central frequency. Multi-wavelength laser lasing with a narrow linewidth and single longitudinal mode is implemented by combining a short linear resonant cavity structure and the optical filter module.

Abstract: The present invention discloses a fault diagnosis and life testing machine for a flexible precision thin-wall bearing (16), including a rack, and an axial loading device, a main driving device, a bearing mounting device, a clamping tooling, a data acquisition device, a hydraulic and a pneumatic auxiliary device which are provided on the rack. The main driving device is connected to a rear side of the axial loading device, and the clamping tooling is arranged at a front side of the axial loading device, for clamping the thin-wall bearing (16) onto the bearing mounting device. The data acquisition device is arranged in the axial loading device and at a side of the rack, the hydraulic and pneumatic auxiliary device is arranged at a side of the rack, and the axial loading device and the main driving device are connected by a pipeline.

Abstract: The present invention provides a method for preparing a transparent free-standing titanium dioxide nanotube array film. In the method, with the titanium foil as a substrate, the titanium dioxide nanotube array film is obtained by anode oxidation on the surface of the titanium foil. Upon high temperature annealing, the titanium dioxide nanotube array film naturally falls off to obtain the transparent free-standing titanium dioxide nanotube array film. The method according to the present invention features simple operations, saves time and cost. With the method, a completely strippable titanium dioxide nanotube array film may be prepared, and in addition, morphology of the titanium dioxide nanotube is not damaged. The free-standing and complete titanium dioxide nanotube array film facilitates transfer and post-treatment, has the feature of transparency and may be in favor of the applications to the studies such as photocatalysis and the like.

Abstract: The present invention discloses a graphical programming control and storage system, which includes a central control module, a display module connected to the central control module, a message response module, a graphical programming inter-component operating module, a graphical programming intra-component operating module, an item attribute and control module, a user-defined component module, an item persistence module, and a compilation module; and the central control module is responsible for processing, storing, and returning a delivered information and result. The system enables a user to complete complex programming by dragging the graphical programming components, and finally generates a formulated language or executable program, thus implementing graphical programming. The present invention can implement graphical programming control and storage by the solution above, enabling visible and intuitive programming, and improving the working efficiency of programmers.

Abstract: A porous catalyst for catalytic activating persulfates to decompose typical pollutants in papermaking wastewater is provided, and a synthesis method thereof and a method of degrading the typical pollutants in paper wastewater by using the porous catalyst are also provided. The porous catalyst MIL-88A@MIP is prepared by a molecular imprinting method comprising using metal organic framework MIL-88A as a precursor and using phthalates as templates.

Abstract: The invention discloses a toll road network traffic information collection and guidance system based on a route identification system, comprising toll road exit and entry toll lane systems, a networked toll center system, a 5.8 G route identification station, a 5.8 G route identification station monitoring system, a dual-frequency pass card for MTC vehicles, an OBU and a non-cash payment card for ETC vehicles, an in-vehicle multimedia terminal and a traffic information processing system. Collection of route identification, traffic information and vehicle driving state information, and traffic information pushing are implemented using the 5.8 GHz route identification station, the dual-frequency pass card and OBU containing a Bluetooth module and an OBU, and the in-vehicle multimedia terminal; processing and predication of information such as travel time, traffic flow, travel velocity, traffic state, and vehicle location on toll road sections are implemented using a method of combining cloud computing with 5.

Abstract: The present invention, belonging to the field of daily skin care products, discloses a tea massage oil, a preparation method therefor and an application thereof. The tea massage oil is prepared from the following raw materials in parts by weight: 40-87 parts of ethyl-esterified tea oil, 5-15 parts of oregano oil, 2-12 parts of melaleuca alternifolia oil, 2-10 parts of pumpkin seed oil, 2-10 parts of prickly pear seed oil, 1-10 parts of passion fruit seed oil, and 1-5 parts of nano germanium oxide. The method comprises: evenly mixing the ethyl-esterified tea oil, the oregano oil, the melaleuca alternifolia oil, the pumpkin seed oil, the prickly pear seed oil, the passion fruit seed oil, and the nano germanium oxide, so as to obtain the tea massage oil. The tea massage oil can eliminate fatigue, achieve a men's health-care function, remove scars, and achieve a far-infrared skin activating function.

Abstract: The present invention discloses a gaze estimation method for a headset device based, on iris and pupil. In the method, only a single camera, a single infrared light source and a central calibration point which is each provided within four average regions at a screen are used, 3D modeling of the pupil and iris is performed through an extracted 2D central feature of eye movement, and a 3D gaze direction vector is established and combined with angle information of the gaze direction, so as to estimate a gaze point position of human eyes. Fully taking a characteristic of applying the headset device into account, the present invention guarantees an accuracy of the gaze point estimation in the headset device and meanwhile greatly reduces the complexity of an entire system structure and a calibration process, and provides a solution with high accuracy and little complexity for the gaze tracking in the headset device.

Abstract: The present invention belongs to the technical field of the preparation of alloy materials, and discloses a high strength and toughness alloy material, a method for preparing the alloy material by semi-solid sintering, and application thereof.

Abstract: A low-profile dual-band filtering patch antenna and its application to LTE MIMO system are disclosed. By using two embedded U-shaped radiating patches and a multi-stub microstrip feed-line, two operating bands and four radiation nulls can been generated and individually controlled, the design is thus very simple and flexible. Based on the proposed low-profile dual-band filtering patch antenna, a MIMO antenna with a very low profile, low mutual coupling and low ECCs has been presented.

Abstract: The invention discloses a method for rapidly predicting freezer storage time of frozen pork based on reflectance ratio of two near-infrared bands. Firstly, the near-infrared spectra information of the frozen pork is obtained by a near-infrared spectrometer, and the near-infrared spectra are analyzed to obtain center values of bands centered on 1500 nm, 1350 nm and 1890 nm characteristic peaks. The ratio thereof is treated as a eigenvector, which is substituted into the characteristic exponential function based on the eigenvector and freezer storage time to calculate the freezer storage time of frozen pork. By near-infrared spectroscopy technology, the invention directly detects the freezer storage time of pork in a frozen state, significantly reduces the time required by the conventional method, and has the advantages of being fast and non-destructive.

Abstract: Disclosed herein is a multi-temperature-region ice-temperature fresh keeping storehouse and a fresh keeping method for bergamot pears that includes a precooling region, a feeding and discharging channel, a cooling region, an ice temperature detection device, a grading device, a conveyer belt control device, an automatic storage device, and a temperature rise and fall buffering channel. The cooling region includes four freezers, with temperatures ranging from 0° C.-?3° C. The four freezers are connected level by level according to a temperature reduction rule. The present disclosure implements multi-temperature-region graded storage of bergamot pears according to the value of an ice point temperature of the bergamot pears, so that they are always stored close to the ice point temperature without freezing, thereby preventing freeze injury, and prolonging shelf life.

Abstract: The present invention relates to a volume pulsed deformation plasticating and conveying method and device by an eccentric rotor. The rotation of the eccentric rotor and the rolling of the rotor in the inner cavity of a stator during constant reverse revolutions cause the volume of the material between the eccentric rotor and the stator to periodically change alternatively along the axial direction and the radial direction of the stator, thereby enabling the volume pulsed deformation plasticating and conveying of the material. The volume pulsed deformation plasticating and conveying device consists of a stator, of which the inner cavity comprises multiple alternatingly disposed spiral segments and straight segments, and an eccentric rotor comprising multiple alternatingly disposed eccentric spiral segments and eccentric straight segments. The eccentric rotor is disposed in the inner cavity of the stator.

Abstract: A filtering switch based on dielectric resonator is disclosed which comprising a rectangular dielectric resonator, a metal cavity in which the dielectric resonator is located, a switch circuitry and a T-shape feeding line structure. The ON- and OFF-states of the filtering switch based on dielectric resonator are realized by controlling a coupling between the dielectric resonator and the feeding line structure. EM fields of the rectangular dielectric resonator and T-shape feeding line structure have been theoretically analyzed and utilized to guide the coupling control. The results have shown low ON-state loss, high power capability and high OFF-state isolation. Transmission zeros are generated at both sides of the passband by cross coupling between dielectric resonators or between feeding line structures and coupling line structures, resulting in high skirt selectivity.

Abstract: Disclosed is a gusset plate connection with sliding end plates for a buckling-restrained brace, including central plate (1), first rib plate (2), second rib plate (3), horizontal end plate (4), first horizontal tie plate (5), second horizontal tie plate (6), bolts (7) and unbonding layers (8). Horizontal end plate (4) is perpendicular to central plate (1) and fixedly disposed on a lower end surface of central plate (1). First horizontal tie plate (5) and second horizontal tie plate (6) are both disposed on an upper surface of horizontal end plate (4) and are located at two sides of central plate (1), respectively. Unbonding layers (8) are each disposed at a bottom surface of horizontal end plate (4), between horizontal end plate (4) and first horizontal tie plate (5), and between horizontal end plate (4) and second horizontal tie plate (6). The components are connected by means of bolts (7).

Abstract: The present disclosure relates to a novel portable electric vehicle, which comprises two front-rear folding mechanisms, a left-right folding mechanism, and an operating mechanism, wherein the two front-rear folding mechanisms for supporting a driver are arranged respectively on the left side and the right side of the bottom of the electric vehicle, the rear ends of the front-rear folding mechanisms are both provided with driving wheel mechanisms, and the front ends of the front-rear folding mechanisms are both provided with rotating wheel mechanisms; two ends of the left-right folding mechanism for driving the two front-rear folding mechanisms to get close to each other are connected respectively to the two front-rear folding mechanisms; and the operating mechanism for controlling the running of the electric vehicle is mounted on the left-right folding mechanism.

Abstract: The present invention provides a chemical heat pump with a multi-channel membrane reactor, comprising: a feeding pipe, a liquid phase pump, a first solenoid valve, a multi-channel waste heat recovering membrane reactor, a discharging pipe, a remainder reflowing pipe, a heat regenerator, a second solenoid valve, a high-temperature heat release reactor, and a third solenoid valve.