Abstract: A content lock firewall method based on a white list includes performing semantic parsing on the payload of a data packet received by a website to obtain parsed texts of the received data packet, and matching the parsed texts of the data packet received by the website with a text pattern library to decide whether to forward or intercept the received data packet, the text pattern library comprising a plurality of text patterns, and each text pattern includes a sequence of keywords and a value range of each keyword. For the website with a relatively fixed function, through deployment of the firewall, known and new network attacks may be effectively defended, and the website may run with vulnerability under the condition of ensuring normal functions, without expensive upgrading.

Abstract: An aqueous iodine-based battery based on multi-electron transfer includes a positive electrode, a negative electrode, a current collector, an electrolyte, and a separator. A porous carbon felt is used as the electrode material on both sides of the positive and negative electrodes, and a polymer film is used as the membrane material. Both the positive and negative electrolytes are stored in the porous carbon felt electrodes. Both the positive and negative electrolytes are acidic mixed solutions containing I? and Cd?; during charging, I? at the positive electrode is charged to Cd(IO3)2, which realizes a electrochemical reaction of six-electron transfer, and the negative electrode involves the deposition of Cd? as a Cd metal; and the process is reversed during discharging. In order to improve the kinetics and reversibility of the multi-electron transfer process, additional additives are added to the solution to improve the electrochemical reversibility of the overall reaction.

Abstract: Provided are a RIC cell, and a preparation method therefor and application thereof. The present invention particularly relates to the lineage-specific differentiation of a pluripotent or multipotent stem cell, specifically to a RIC cell differentiated from a stem cell, and a preparation method therefor and application thereof.

Abstract: The present invention belongs to the technical field of geological exploration deep Earth. The system of the present invention is configured to: collect seismic data, and preprocess original seismic data to obtain standardized gamma ray logging parameters; extract features from the standardized gamma ray logging parameters to obtain a variance attribute curve while drilling; obtaining a formation thickness prediction model of each set based on the variance attribute curve while drilling; acquire frequency-division seismic data based on the standardized seismic data by means of a frequency-division processing method based on wavelet transform; acquire optimal seismic frequency band information based on a predicted formation thickness value of each set; establish a geological prediction model of the current formation based on the frequency-division seismic data, the optimal seismic frequency band information, historical gamma ray logging parameters and the standardized gamma ray logging parameters.

Abstract: The present invention provides a quantitative analysis method on influence of black carbon emission to glacier change.

Abstract: Use of non-A modification of a poly(A) tail in promoting mRNA translation. It is found, by analyzing the poly(A) tails of human and mouse cells and mRNA translation, that the non-A modification of the poly(A) tail is positively correlated with the translation efficiency. Genetic analysis shows that GLD-4, an atypical poly(A) polymerase in a nematode, can regulate translation by establishing the poly(A) tail non-A modification. Furthermore, it has been proved by experiments that the non-A modification of a poly(A) tail can effectively promote mRNA translation, and the addition of G, C and U in the poly(A) tail can promote mRNA translation and improves the content of corresponding proteins. Therefore, it is proposed that the non-A modification of a poly(A) tail can be used as a new technical means for effectively promoting mRNA translation.

Abstract: An azimuth ambiguity suppression method for a spaceborne SAR in spatially non-uniform sampling relates to the technical field of radars. The method includes the following steps: step 1: compensating for a phase difference between the channels according to the locations of transmitting and receiving stations for channel echoes; step 2: calculating an equivalent azimuth sampling location of each channel at the moment of each pulse transmission; step 3: sorting the equivalent azimuth sampling locations of all channels and their corresponding echoes after the phase difference between the channels is compensated in ascending order; and step 4: calculating reconstructed echoes from the sorted equivalent azimuth sampling locations and corresponding echoes after the phase difference between the channels is compensated, by using an adaptive weight-conjugate gradient-Toeplitz matrix (ACT) algorithm.

Abstract: Disclosed is an environment-friendly and flame-retardant abradable seal coating material with an ultra-low density and a use method thereof. The seal coating material includes a component A and a component B packaged separately; the component A includes 20-30 wt % of a curing agent for bisphenol A epoxy resin, 20-30 wt % of a liquid phosphorus-containing curing agent, 20-40 wt % of a hollow glass microbead, 1-5 wt % of 2,4,6-tris(dimethylaminomethyl)phenol, 5-15 wt % of dimethyl methylphosphonate and 0.5-3 wt % of a silane coupling agent; the component B includes 30-40 wt % of a bisphenol A epoxy resin, 30-40 wt % of a liquid phosphorus-containing epoxy resin, 20-30 wt % of a hollow glass microbead, 0-10 wt % of a liquid acrylonitrile-butadiene rubber and 0.5-3 wt % of a silane coupling agent. The method includes: mixing the component A and the component B to obtain a coating, and applying the obtained coating to a surface of a part for curing.

Abstract: A method for directly preparing a trivalent chromium compound by electrochemical oxidation of ferrochrome is provided. The method includes: putting ferrochrome as an anode, and placing the anode into an electrolyte solution containing a complexing agent together with a cathode, then turning on a power supply for electrolysis reaction so that chromium and iron in ferrochrome are directly converted into free Cr3+ and Fe3+ respectively, allowing one of Cr3+ and fe3+ to form a stable soluble metal complex together with the complexing agent, and allowing the other of Cr3+ and Fe3+ to form a metal hydroxide solid together with OH? generated by electrolysis reaction, so as to obtain an electrolysis completion slurry. Compared with the prior art, the present application has no hexavalent chromium salt stage, thereby shortening the process flow and avoiding the generation of chromium-containing waste residue.

Abstract: A multi-stage buffer hydraulic cylinder for a wave-energy power generation apparatus and a multi-stage buffer hydraulic control method are provided. A built-in fixed rod is arranged inside a cylinder barrel of a hydraulic cylinder and nested in a piston rod, and a fixed-rod inner cavity and a piston-rod inner cavity are taken as high-pressure working cavities, such that the diameter of the piston rod can be increased while the effective work area is reduced. Front and rear end covers of the hydraulic cylinder each are provided with a buffer spring for buffering the strike caused by the excessive stroke of the piston rod under the extreme wave condition, and the hydraulic cylinder may be buffered under the condition of heavy waves by setting the stiffness of the spring, such that a main piston does not strike the front and rear end covers.

Abstract: Disclosed are a 3D printing device, and a method for preparing a 3D printed structure. The device comprises a curing system (1), and a curing pattern player (6), a flat curing surface (2) with dewettability, and a receiving base (4) capable of moving upwards and away from the flat curing surface, with same being successively arranged above the curing system (1), wherein a curing medium provided by the curing system (1) passes through the curing pattern, so that ink between the flat curing surface (2) and the receiving base (4) is cured.

Abstract: A production and transportation system for natural gas hydrates includes a gas storage reservoir, a plurality of hydrate storage and transportation tanks, a refrigerator, a pressure regulating valve, a liquid storage tank, a living quarter/surrounding user, a hydrate storage reservoir, a plurality of connecting pipes, a plurality of one-way gas valves, one-way liquid valves, and optional liquid pumps. The plurality of hydrate storage and transportation tanks are connected in parallel through the connecting pipes and then connected with an output end of the gas storage reservoir through the pressure regulating valve, the liquid storage tank is connected with the optional liquid pump and then sequentially connected with the plurality of hydrate storage and transportation tanks, and the plurality of hydrate storage and transportation tanks are connected in parallel and then connected with an input end of the living quarter/surrounding user through the optional liquid pump.

Abstract: A method for regulating and controlling a generated crystal form of a natural gas hydrate is provided. A mixture composed of a salt substance, a surfactant, a water-soluble thermodynamic additive and water is introduced in a generation process of the natural gas hydrate. The salt substance and the surfactant also have a synergistic effect with a water-soluble thermodynamic accelerator. The addition of the salt substance and the surfactant can change a local solubility of the water-soluble thermodynamic additive in water, so that the regulating and controlling process of the hydrate crystal can be realized, thereby improving a hydrate gas storage capacity and solving the problem of low natural gas storage capacity in the generated natural gas hydrate in a water-soluble thermodynamic additive system.

Abstract: A method for storing and transporting a hydrate with high natural gas storage capacity is provided. The method adopts a mode of generating the hydrate at a low temperature and storing the hydrate at a high temperature, and specifically includes: in a mode that a hydrate reaction tank is used as a transportation tank at the same time, introducing a mixed hydrate reaction liquid into the hydrate reaction tank matched with a transportation vehicle; introducing natural gas; enabling a hydrate generation reaction at a temperature of 273.65-283.15 K; in case of equilibrium of the reaction, heating to a temperature of less than or equal to 298.15 K for storage for long-distance transportation. By adopting the present method, the hydrate with high natural gas storage capacity can be synthesized within a relatively short period of time, and the hydrate can be safely, economically and efficiently transported to a destination.

Abstract: The present invention discloses a phosphine nitrogen ligand with multiple chiral centers and its synthesis method and application. The ligand has the axial chirality of a biaryl skeleton and the central chirality of a chiral amine. The chiral ligand is synthesized from commercially available raw materials through a simple five-step reaction, and the resulting diastereomer can be separated by simple column chromatography or recrystallization. The chiral phosphine nitrogen ligand synthesized by the present invention can catalyze the asymmetric three-component coupling reaction of terminal alkynes, aldehydes and amines, and realize the efficient preparation of chiral propargyl amines with high optical activity.

Abstract: A high-power bidirectional-driven bionic muscle fiber as well as a preparation method and use thereof are provided. The bionic muscle fiber includes a matrix fiber and an object material layer coating the matrix fiber, where the matrix material is capable of emitting heat after electrification, and the object material layer includes a liquid crystal elastomer (LCE); the bionic muscle fiber is excessively twisted to form a helical barrel-like structure. The bionic muscle fiber provided by the present application improves the mechanical property of the LCE, shows large work capability and drive quantity, and has an realize rapid response and work at high frequency. The contraction of the fiber can be controlled by changing voltage. Furthermore, the bionic muscle fiber exhibits a bidirectional driving feature that can recover without stress. In addition, the cyclic work of the fiber is greater than zero.

Abstract: The present disclosure discloses a method for suppressing the azimuth ambiguity of multi-channel SAR systems based on channel cancellation, which falls within the field of radar signal processing. The method includes: imaging echoed of the multi-channel SAR system based on a linear mapping reconstruction algorithm to obtain a reconstructed high-resolution wide-swath image; estimating positions of the azimuth ambiguity regions of the reconstructed high-resolution wide-swath image; extracting ambiguity images in the azimuth ambiguity regions based on channel cancellation and the refocusing algorithm; and suppressing a repetitive ambiguity image in imaging the echo of the multi-channel SAR system.

Abstract: The present disclosure discloses a distributed capacitance energy absorption verification device, which belongs to the field of direct-current high-voltage surge suppression. The distributed capacitance energy absorption verification device mainly includes a direct-current high-voltage generator, a high-voltage switch, a high-voltage capacitor bank, an isolation transformer, an energy absorption device, a high-voltage sphere gap short-circuit switch and other components. The high-voltage capacitor bank is used for simulating a distributed capacitance, and the high-voltage sphere gap short-circuit switch is used for simulating a short-circuit fault of a direct-current high-voltage system, thereby implementing performance verification of the energy absorption device.

Abstract: A wide-field imaging and hyperspectral collaborative early warning system and method are provided. The system includes: a primary imaging system, a digital micromirror array, a first collimation system, a second collimation system, a first reflector, a second reflector, a wide-field imaging optical filter, a narrow-band optical filter, a wide-field imager and a hyperspectral interferometer. The system and method have the advantages that the wide-field imaging general survey and fine spectrum detection can be realized synchronously, the functions are multiple, and the false alarm rate is low; the target spatial resolution of the fine spectrum identification is adjustable, the micro-control unit flipping solution is simple to operate, and quick adjustment is realized; the adaptability is strong, the flipping time of the corresponding micro-control unit is adaptively adjusted for the measured target with too low or too strong radiation intensity, and the dynamic range of the system is effectively improved.

Abstract: A large-space high-temperature and high-pressure true triaxial flexible loading device includes a cylinder reaction frame, which includes a cylinder, a lower shear ring, an upper shear ring, a bottom cover, and a top cover, wherein the bottom cover and the top cover are detachably mounted at a bottom and a top inside the cylinder respectively, and an interior of the cylinder is divided to form a loading space for performing a triaxial test on a square test block; the lower shear ring is detachably embedded on an inner wall of the cylinder below the bottom cover; the upper shear ring is detachably embedded on the inner wall of the cylinder above the top cover; a confining pressure reaction frame, mounted in the loading space around the square test block; and, flexible loading mechanisms, disposed in pairs at two opposed side surfaces of the square test block.