Abstract: The present disclosure pertains to the field of data sharing and particularly discloses an access control method based on outsourced computation and attribute-based searchable encryption on blockchain. The method comprises steps of generating a system public key and a master key, and generating a user attribute private key; formulating an access control policy to assist an outsourced encryption service provider in performing a partial encryption using a data ciphertext storage address and a symmetric key, and uploading a blockchain; generating a search trapdoor and sending the search trapdoor to the blockchain to verify the user attribute; and partially decrypting the ciphertext with assistance of the outsourced decryption service, followed by local decryption to obtain a data storage address and the symmetric key. The present disclosure alleviates the computational burden of local encryption and decryption for users, and leads to a significant improvement in data sharing efficiency and security.

Abstract: An anode material contains nitrogen, a carbon matrix and an active substance. The carbon matrix has pores, into which at least part of the active substance is disposed. The anode material has a first region having a depth of less than or equal to 200 nm from an outer surface of the anode material and a second region having a depth of greater than or equal to 1000 nm from the outer surface of the anode material. The first region contains ? atomic percent of nitrogen, and the second region contains ? atomic percent of nitrogen, where ?<?, a deposition parameter of the active substance is defined as ?, and ??0.86. In the anode material, a relatively large part of the active substance is distributed in the pores of the carbon matrix, which reduces gas production of the anode material, and facilitates the conductive performance of the carbon matrix.

Abstract: An anode material comprising: a carbon material having pores therein, wherein a total pore volume of pores with a pore size of 3 nm or more and 1,000 nm or less, measured by mercury intrusion porosimetry is V1, and 0<V1<0.1 mL/g; a total pore volume of pores with a pore size of 3 nm or more and 400 nm or less, measured by mercury intrusion porosimetry is V2, and a ratio V2/V1 ranges from 40% to 70%; and a total pore volume of pores with a pore size of 3 nm or more and 500 nm or less, measured by mercury intrusion porosimetry is V3, and a ratio V3/V1?60%.

Abstract: An anode material includes a core and a coating layer. The coating layer is located on a surface of the core, the core includes natural graphite and first amorphous carbon filled in pores of the natural graphite, and the coating layer includes second amorphous carbon. A Raman spectrum of the anode material has a D peak and a G peak, and an intensity ratio of the D peak to the G peak is ID/IG. The core includes an inner layer region and an outer layer region outside the inner layer region, and the outer layer region is closely adjacent to the coating layer. An average value of ID/IG in the inner layer region is Ka, and an average ratio of ID/IG values of the inner layer region to the outer layer region is K, which satisfy: 0.4?Ka?0.7, and 0.5?K<0.9.

Abstract: A concealed cup holder assembly comprises a cup holder housing, within which a cup holder is disposed, which is fixedly connected to an upper front panel of an armrest of a chair, and wherein the upper front panel of the armrest of the chair is pivotally mounted upon a lower front panel of the armrest of the chair. A telescopic cylinder has a first end thereof operatively connected to the cup holder housing, while a second opposite end thereof is operatively connected to an internal support panel of the armrest of the chair. When the cup holder housing is to be moved from its retracted position to its extended position, a user grasps the upper front panel of the armrest of the chair and moves the upper front panel of the armrest of the chair forwardly.

Abstract: Low molecular weight heparin (LMWH) suitable for equivalent use to USP enoxaparin sodium is prepared from a starting material isolated from engineered E. coli K5 capsular polysaccharide, e.g., E. coli K5 heparosan. The E. Coli CPS is treated with acids to remove 3-deoxy-D-manno oct-2-ulosonic acid (Kdo) residues, and further hydrolyzed via alkali treatment to form low molecular weight N-sulfo, N-acetyl heparosan (LMW-NSNAH) having molecular weight and N-acetylation comparable to enoxaparin. The LMW-NSNAH is converted to LMWH via a series of enzymatic modifications by C5-epimerase, 2-O-, 6-O-, and 3-O-sulfotransferases. Compositions including the LMWH are prepared without the use of porcine-derived heparin, and thus benefit from better source material availability, better control of manufacturing processes, reduced concerns about contamination, adulteration or animal virus, or impurities. Further, the LMWH product is demonstrated to be structurally and functionally comparable traditional pharmaceutical LMWHs.

Abstract: The present application relates to a field of anode material, and a silicon carbon composite anode material and preparation method thereof, and a lithium ion battery provided. The silicon carbon composite anode material includes a silicon-based active particle, a conductive material, and a carbon coating layer, where the carbon coating layer is present on surface of the silicon-based active particle and/or the conductive material; and a semi-width of an X-ray diffraction angle (2?) of the silicon-based active particle on a crystal face (111) is greater than or equal to 0.5 degree when X-ray diffraction of the silicon-based active particle is tested with CuK? ray. The silicon carbon composite anode material and preparation method thereof, and a lithium ion battery can effectively inhibit volume expansion of anode material and improve cycle performance of battery.

Abstract: Provided is carbon material, anode material, and battery. The carbon material has pores, and a length-diameter ratio of particles of the carbon material is 3-15. The particles of the carbon material of the present disclosure have a rod-shaped structure, and the rod-shaped particles of the carbon material may be arranged and stacked together to reduce gaps among the particles of the carbon material and improve the compaction density of the carbon material, thereby improving the surface capacity density of a carbon material electrode sheet.

Abstract: Provided is an anode material and a battery. The anode material includes a carbon matrix and an active substance, and at least a portion of the active substance is distributed in the carbon matrix; and surface cleanliness of the anode material is ?, and ??60%. The anode material and the battery provided in the present disclosure can alleviate cyclic attenuation of the anode material, reduce side reactions between the anode material and an electrolyte solution, and reduce a gas production phenomenon of the anode material, thereby comprehensively improving the capacity, expansion performance, and cycling performance of the anode material.

Abstract: Described implementations provide an apparatus that includes a direct bonded metal (DBM) substrate including at least a metal layer coupled to a dielectric layer, a semiconductor device coupled to the DBM substrate, a first protrusion associated with the metal layer, and a conductive portion of a package including a second protrusion that is configured to engage with the first protrusion.

Abstract: Provided is an anode materials and battery. The anode material contains a carbon matrix and an active substance, and the carbon matrix contains oxygen element and nitrogen element; and a mass content of the oxygen element in the anode material is A %, a mass content of the nitrogen element in the anode material is B %, powder conductivity of the anode material is P S/cm, and A, B, and P meet the following relationship: M = AB P , M ? 5 . In the anode material provided in the present application, the relationship of the nitrogen content, the oxygen content, and the powder M = AB P , M ? 5 .

Abstract: Disclosed are an underground engineering rock mass shear simulation test device, a test method and a test machine. The test method includes: setting different test conditions by a controller to perform cyclic shear test at high temperature, fracture shear seepage test, granite uniaxial compression test at high temperature and granite fracture shear test under constant normal stiffness boundary conditions at room temperature. The electric heating wire assembly, the fan assembly and the environmental box are combined to flexibly and uniformly heat the samples placed in the upper shear box and the lower shear box. In terms of shear-seepage test, this scheme proposes a second sample placing mechanism that realizes sealing through sealing capsule and sealing capsule pressing plate. It realizes stable sealing and facilitates monitoring and debugging of seepage parameters.

Abstract: The present disclosure relates to the field of negative electrode materials, and provides a negative electrode material and a preparation method therefor, and a lithium ion battery. The negative electrode material comprises an aggregate, the aggregate comprising an active substance and a carbon material. The mass percentage of the active substance in the aggregate gradually decreases from the center to the surface of the aggregate. The negative electrode material provided by the present disclosure can effectively suppress volume expansion of the negative electrode material and improve battery cycle performance.

Abstract: The present invention relates to a group switching method under energy saving modes and belongs to the technical field of communications. By dynamically managing the access and switchover of users through the grouping method, the existing users are provided with services of sufficient quality and quantity, and the switching efficiency is improved so that the cells are prevented from overloading and wasting resources. The proposed group switching method is mainly to group switch users and energy saving compensation cells according to the business types of users and dynamically divide user groups and access the user groups according to resources required by the users and the relationship of sizes of resources provided by the compensation cells. The method fully guarantees the business needs of users and improves the utilization rate of cell resources.

Abstract: An anode material includes a matrix material and a silicon material, and at least some of the silicon material is present in the matrix material, where the silicon material includes a first phase and a second phase, where the anode material is measured by a precession electron diffraction method that: based on a region with the silicon material present, a region with the silicon material in the first phase present has an area proportion A of A ?70%, and a region with the silicon material in the second phase present has an area proportion B of 0<B?30%. The anode material have low expansion, high capacity and excellent cycle performance.

Abstract: An optical module includes: a circuit board provided with optical emission and reception chips; and a lens assembly having a bottom connected to the circuit board and covering the optical emission and reception chips. The lens assembly includes a lens assembly body, first and second optical fiber adapters arranged at a first end of the lens assembly body and configured to transmit emission optical signal and reception optical signal, respectively. A distance between centers of the optical emission chip and the optical reception chip, in a direction perpendicular to an optical axis of the first optical fiber adapter and an optical axis of the second optical fiber adapter, is less than a distance between optical axes of the first optical fiber adapter and the second optical fiber adapter. The lens assembly body is formed thereon with four optical surfaces.

Abstract: An optical module includes: a circuit board; an optical chip; a lens assembly covered on the optical chip, a first seal exists between the lens assembly and the circuit board, the lens assembly is provided with a wrapping cavity and is provided with a recessed optical port groove and a blocking assembly at least partially covered on the optical port groove, and the optical port groove has a reflective surface; an optical fiber holder fixedly connected to an optical fiber at one end and fixed in the wrapping cavity at the other end, a second seal is located between respective side faces of the optical fiber holder and outer side faces of three side walls of the wrapping cavity away from the circuit board, and around a side wall of the wrapping cavity close to the circuit board.

Abstract: Anode material, and battery. Anode material includes graphite and carbon layer located on at least part of surface of graphite. Particle surface and particle section of anode material are respectively tested by Raman spectroscopy, peak area ratio of D characteristic peak within range of 1300 cm?1 to 1350 cm?1 to G characteristic peak within range of 1500 cm?1 to 1580 cm-1 is ID/Ig, ratio of ID/IG measured on the particle surface is A, and ratio of ID/IG measured on particle section is B, and 1.22<A?B?2.10. Anode material improves lithium-ion transport kinetics, initial Coulombic efficiency, and cycle performance.

Abstract: Anode material, and battery. Anode material includes graphite and carbon layer located on at least part of surface of graphite. Particle surface and particle section of anode material are respectively tested by Raman spectroscopy, peak area ratio of D characteristic peak within range of 1300 cm?1 to 1350 cm?1 to G characteristic peak within range of 1500 cm?1 to 1580 cm?1 is ID/IG, ratio of ID/IG measured on the particle surface is A, and ratio of ID/IG measured on particle section is B, and 1.22<A-B?2.10. Anode material improves lithium-ion transport kinetics, initial Coulombic efficiency, and cycle performance.