Abstract: An isomerization feature-based method for purifying and preparing punicalagin is provided, wherein pomegranate peel extract is used as a raw material. The isomerization feature-based method avoids impurities contained in the punicalagin based on structural characteristics, for example, the punicalagin in the pomegranate peel extract has two mutually convertible isomers. In the isomerization feature-based method, a pilot-scale preparative liquid chromatography is used to obtain a large amount of the punicalagin having a purity higher than 98% from a complex pomegranate peel extract. The isomerization feature-based method is simple, an obtained punicalagin has high purities and a preparation is in a massive scale. The isomerization feature-based has a strong reference value for purification and preparation of compounds with isomerization features.

Abstract: The reactor core includes at least one module, a solid neutron moderator, and a liquid neutron moderators. Each module contains a casing, at least one heat pipe, one fuel element and thermal insulation. The heat pipe comprises a casing, a wick, and a coolant. The fuel element is made of nuclear fuel, arranged along an evaporation area of the heat pipe, around the heat pipe casing, in thermal contact with the heat pipe casing, and enclosed in a can. Liquid metals are used as the coolant of the heat pipe. Thermal insulation is arranged between the can and the module casing. At least one hole is made in the solid neutron moderator. Each module is arranged within a respective hole of the solid neutron moderator. The space between the module casing and the solid neutron moderator is filled with a liquid neutron moderator.

Abstract: A nonlinear optical crystal of barium cesium borate, a preparation method and use thereof are provided. The nonlinear optical crystal has a chemical formula of CsBa3B11O20 and a molecular weight of 983.84. The nonlinear optical crystal belongs to an orthorhombic crystal system; a space group of the nonlinear optical crystal is Cmc21; lattice parameters of the nonlinear optical crystal are a=19.011(7) ?, b=10.837(4) ?, c=8.578(3) ?, Z=4, V=1767.4(11) ?3; and a Mohs hardness of the nonlinear optical crystal is 4-5. The nonlinear optical crystal is grown by a flux method. The nonlinear optical crystal of the barium cesium borate obtained is used for a manufacture of non-linear optical devices. The nonlinear optical crystal has a large size of centimeter-scale at least and is prepared by fast, simple and low-cost operations. The nonlinear optical crystal prepared has a large size, a wide light transmission band and good mechanical properties.

Abstract: The present invention discloses a hypocrellin derivative substituted both in a pen-position and in a 2-position by an amino, and a preparation method and use thereof. A general structural formula of the derivative is as represented by formulas I-a to I-d: The hypocrellin derivative substituted both in a peri-position and in a 2-position by an amino prepared in the present invention has a maximum absorption wavelength of 600-650 nm and a molar extinction coefficient reaching about 20000-40000 M?1cm?1. Compared with unmodified hypocrellin or hypocrellin having only a 2-position modified, an absorption spectrum of the derivative is significantly red-shifted and the molar extinction coefficient is greatly improved, and the derivative can efficiently produce reactive oxygen species such as singlet oxygen in a photosensitive condition.

Abstract: Provided by the present invention is a magnesium-antimony-based (Mg—Sb-based) thermoelement, a preparation method and application thereof. The Mg—Sb-based thermoelement comprises: a substrate layer of a Mg—Sb-based thermoelectric material positioned in the center of the thermoelement, transitional layers that are attached to the two surfaces of the substrate layer, and two electrode layer that are respectively attached to the surfaces of the two transitional layers; the transitional layers are made of a magnesium-copper alloy and/or magnesium-aluminum alloy, and the electrode layer is made of copper. The transitional layer and the electrode layer which are developed in the present invention and which are suitable for a Mg—Sb-based thermoelectric material have great significance and prospects in application. The electrode layer enable the Mg—Sb-based thermoelectric material to have an opportunity to enter the market and realize commercialization.

Abstract: The invention provides a composite-coated nano-tin negative electrode material, which comprises a tin-based nanomaterial, a nano-copper layer coated on the surface of the tin-based nanomaterial and a conductive protective layer coated on the surface of the nano-copper layer. The nano-copper layer can inhibit the volume expansion of nano-tin, keep the nano-tin material from cracking, avoid direct contact between nano-tin and electrolyte to form stable SEI and increase the conductivity of the electrode. Coating a conductive layer on the surface of the nano-copper layer can effectively inhibit the oxidation of nano-copper, thus improving its electrochemical performance. The composite-coated nano-tin negative electrode material according to the invention is used as a negative electrode material of a lithium-ion battery, has excellent electrochemical performance, and has potential application prospects in portable mobile devices and electric vehicles.

Abstract: This invention relates to a double layer composite-coated nano-silicon negative electrode material, and its preparation methods and use, the negative electrode material comprising: a silicon-based nanoparticle, a copper layer coated on the surface of the silicon-based nanoparticle, and a conductive protective layer coated on the surface of the copper layer. Nano-copper has superplastic ductility and conductivity, and the prior art has proved that lithium ions can penetrate nano-copper; therefore, the copper coating layer has effects of inhibiting the volume expansion of the silicon-based nanoparticle and keeping the silicon-based nanoparticle from cracking so that direct contact between the silicon-based nanoparticle and an electrolyte is effectively avoided and a stable SEI is formed, and increasing the conductivity of the electrode.

Abstract: The present invention provides a patterned silicon substrate-silicon germanium thin film composite structure comprising a silicon substrate having a patterned structure, a silicon germanium buffer layer positioned on the silicon substrate, a silicon germanium/silicon superlattice layer positioned on the silicon germanium buffer layer and a silicon germanium thin film layer positioned on the silicon germanium/silicon superlattice layer, wherein the silicon germanium/silicon superlattice layer comprises silicon germanium layers and silicon layers which are grown alternately. The present invention also provides a preparation method of the patterned silicon substrate-silicon germanium thin film composite structure of the present invention. The present invention also provides an application of the patterned silicon substrate-silicon germanium thin film composite structure of the present invention in strained silicon devices.

Abstract: An X-ray single-pixel camera based on X-ray computational correlated imaging, which belongs to the technical research fields of X-ray computational correlated imaging and X-ray single-pixel imaging. The X-ray single-pixel camera includes: an X-ray modulation system (3), an X-ray modulation control system (4), an X-ray single-pixel detector (5), a main control system unit (6), a time synchronization system (7) and a computational imaging system (8). The main control system unit (6) controls each module through software; the time synchronization system (7) controls synchronization of each module for automatic collection; and the computational imaging system (8) is configured to perform a second-order correlated computation or a compressed sensing computation or a deep learning computation on the signals collected by the X-ray single-pixel detector (5) and a preset modulation matrix, so as to obtain an image of an object under test.

Abstract: An X-ray single-pixel camera based on X-ray computational correlated imaging, which belongs to the technical research fields of X-ray computational correlated imaging and X-ray single-pixel imaging. The X-ray single-pixel camera includes: an X-ray modulation system (3), an X-ray modulation control system (4), an X-ray single-pixel detector (5), a main control system unit (6), a time synchronization system (7) and a computational imaging system (8). The main control system unit (6) controls each module through software; the time synchronization system (7) controls synchronization of each module for automatic collection; and the computational imaging system (8) is configured to perform a second-order correlated computation or a compressed sensing computation or a deep learning computation on the signals collected by the X-ray single-pixel detector (5) and a preset modulation matrix, so as to obtain an image of an object under test.

Abstract: Provided by the present invention is a magnesium-antimony-based (Mg—Sb-based) thermoelenient, preparation method and application thereof. The Mg—Sb-based. thermoelement comprises: a substrate layer of a Mg—Sb-based. thermoelectric material positioned in the center of the thermoelement, transitional layers that are attached to the two surfaces of the substrate layer, and two electrode layer that are respectively attached to the surfaces of the two transitional layers; the transitional layers are made of a magnesium-copper alloy and/or magnesium-aluminum alloy, and the electrode layer is made of copper. The transitional layer and the electrode layer which are developed in the present invention and which are suitable for a Mg—Sb-based thermoelectric material have great significance and prospects in application. The electrode layer enable the Mg—Sb-based thermoelectric material to have an opportunity to enter the market and realize commercialization.

Abstract: Disclosed in the present invention is a nonlinear optical crystal. The chemical formula of the nonlinear optical crystal is MHgGeSe4, M being selected from Ba or Sr. The nonlinear optical crystal has no symmetrical center, belongs to an orthorhombic crystal system, and has a space group Ama2. The nonlinear optical crystal is an infrared nonlinear optical crystal, and has the advantages of great nonlinear optical effect, wide light transmitting band, high hardness, good mechanical properties, breakage resistance, deliquescence resistance, easiness in processing and preserving, etc. Also disclosed in the present invention are a method for preparing the nonlinear optical crystal and application thereof.

Abstract: Methods and devices are described for performing an all-phase measurement of an ultra-fast laser pulse having a spectral range of greater than one octave. The ultra-fast laser pulse may be split into a first beam comprising a fundamental light with a wavelength ?0 and a second beam comprising a light with a wavelength 2?0. The light with the wavelength 2?0 may be frequency doubled to a light with a wavelength ?0 to generate an interference with the fundamental light. Fourier transform may be performed on an interference spectrum of the interference, and a relative envelope delay (RED) between the fundamental light and the frequency doubled light and a carrier envelope phase (CEP) may be acquired based on a result of the Fourier transform.

Abstract: A method for producing a recombinant adeno-associated virus (rAAV) and a recombinant baculovirus virus, the method including: (1) infecting an insect host packaging cell line with a corresponding recombinant baculovirus integrated with an rAAV genome ITR-GOI (gene of interest flanked by AAV inverted terminal repeats) and an AAV Cap gene or AAV Rep gene; (2) culturing the host packaging cell line infected with the recombinant baculovirus, so as to produce the recombinant adeno-associated virus; and (3) separating and purifying the recombinant adeno-associated virus obtained in (2).

Abstract: Disclosed in the present invention is a semiconductor laser, which includes one or more semiconductor chips (1-1), a total length of a gain region (1-11A) of a light-emitting unit (1-11) of each of the semiconductor chips (1-1) in a slow axis direction being 1 mm˜10 cm; a laser resonant cavity configured to adjust semiconductor laser emitted by the light-emitting unit (1-11) to resonate in the slow axis direction, so that the size of the gain region (1-11A) of the light-emitting unit (1-11) in the slow axis direction matches a fundamental mode spot radius ?0; and a fast-axis collimating element (FAC) disposed in the laser resonant cavity and configured to collimate the laser emitted by the light-emitting unit (1-11) in a fast axis direction. The semiconductor laser according to an embodiment of the present invention can improve the high-power output capability of the gain region on the one hand, and improve the beam quality on the other hand, which can achieve a high beam quality output of M2<2.

Abstract: The invention discloses a monosubstituted or polysubstituted amphiphilic hypocrellin derivative, and a preparation method and application thereof. The amphiphilic hypocrellin derivative substituted by a group containing PEG, a quaternary ammonium salt or the like prepared according to the invention has an obvious red shift in its absorption spectrum and a significantly enhanced molar extinction coefficient, compared with the parent hypocrellin, can efficiently produce singlet state oxygen and other reactive oxygen species under photosensitive conditions; has different amphiphilicities and increased biocompatibility with cells or tissues by regulating its hydrophilicity and hydrophobicity; can meet the requirements of different clinical drugs, and solves the requirements of different drug delivery methods for different drug hydrophilicity and lipophilicity.

Abstract: The present disclosure relates to a magnonic magnetoresistance (MMR) device and an electronic equipment including the same. According to one embodiment, a core structure of a MMR device may include: a first ferromagnetic insulating layer (Ferro-magnetic Insulator, FMI1); a two-dimensional conductive material layer (Spacer) set on the first ferromagnetic insulating layer; and a second ferromagnetic insulating layer (Ferro-magnetic Insulator, FMI2) set on the two-dimensional conductive material layer. The MMR device of the present disclosure may enhance interface effect in spin electron transmission and thus improve performance of the MMR device.

Abstract: A carbon-based anode material with high ramp capacity, a preparation method therefore, and a use thereof. The method includes placing a carbon source precursor into a crucible and heating to 400° C-1000° C. at a heating rate of 0.2° C./min-30° C./min under an inert atmosphere, wherein the precursor includes any one or a combination of at least two of fossil fuel, biomass, resin, and organic chemicals; and carrying out heat treatment on the precursor at a temperature of 400° C. to 1000° C. for 0.5-48 hours to carbonize the precursor to obtain a carbon-based negative electrode material. The specific surface area of the anode material is less than 10 m2/g. and assembling the obtained electrode material into a sodium ion battery and then carrying out charging and discharging between 0 and 2.5 V, to obtain a voltage curve. The ramp capacity being above 180 mAh/g and the first-cycle Coulombic efficiency is above 75%.

Abstract: A pre-lithiated film and a preparation method therefor and an application thereof. The pre-lithiated film comprises: a 1 ?m-50 ?m base film and a 0.02 ?m-100 ?m pre-lithiated coating coated on the base film; the pre-lithiated coating includes: 1 wt %-99.99 wt % of a pre-lithiated material, 0 wt %-98.99 wt % of a coating material, 0.01 wt %-10 wt % of a binder, 0 wt %-10 wt % of a conductive additive material, 0 wt %-2 wt % of a dispersing agent and 0 wt %-2 wt % of an aid. The pre-lithiated material is a material that can produce an electrochemical reaction to release lithium ions under voltage control.

Abstract: The present invention provides a sulfur-based positive electrode active material for use in a solid-state battery, comprising: 30-80 wt % of Li2S, 10-40 wt % of one or more second lithium compounds selected from LiI, LiBr, LiNO3, and LiNO2, and 0-30 wt % of a conductive carbon material; a method for preparing the sulfur-based positive electrode active material, a positive electrode including the sulfur-based positive electrode active material, and a solid-state battery including the positive electrode. The sulfur-based positive electrode active material and the positive electrode provide a high specific capacity and an increased discharge voltage.