Abstract: A quantitative evaluation method for integrity and damage evolution of a cement sheath in an oil-gas well is provided based on a fractal theory, an image processing technology, structural features and failure mechanisms of a casing-cement sheath-formation combination. The method uses correlations among fractal dimensions of casing-cement sheath interface morphology, cement sheath microscopic pore morphology, particle morphology of an initial blank group, and macroscopic mechanical properties including a radial cementing strength of the cement sheath interface, a tensile strength, and a compressive strength to quantitatively evaluate the integrity of the cement sheath of the blank group.

Abstract: An anechoic chamber and a construction method thereof are provided, the anechoic chamber includes a top surface, being a polygon; trapezoid surfaces, corresponding to edges of top surface, upper edge lengths of trapezoid surface being equal to edge lengths of top surface, trapezoid surfaces being connected to edges of top surface through the upper edges, the trapezoid surfaces being sequentially connected along a circumferential direction of top surface, and being at angle to the top surface; rectangular surfaces, corresponding to the trapezoid surfaces, upper edge lengths of rectangular surface being equal to lower edge lengths of trapezoid surface, rectangular surfaces being connected to the trapezoid surfaces through the upper edges, the rectangular surfaces being sequentially connected along a circumferential direction of the lower edges of trapezoid surfaces, and being perpendicular to the top surface; and an absorbing material, disposed on the top surface, the trapezoid surfaces and the rectangular surf

Abstract: An embodiment of this application provides a method and apparatus for testing control software, and a computer-readable storage medium to reduce the time consumed in the simulation-based debugging and enhance efficiency. The method may include obtaining test information of a plurality of fault signals; and injecting, based on the test information of the plurality of fault signals, the plurality of fault signals into a simulation environment in sequence to obtain test results of the plurality of fault signals handled by the control software, where the simulation environment may be a simulation environment of a control object of the control software.

Abstract: The present invention relates to a preparation and purification method for cationic quaternary ammonium salt of sodium hyaluronate in homogeneous medium. By adding a homogeneous solvent and a sodium hyaluronate solid to a vessel, heating the vessel until the contents are dissolved to form a homogeneous system, adding an aqueous solution of 2,3-epoxypropyltrimethylammonium chloride (GTA) to the homogeneous system, then adding a base catalyst, and stirring at a preset temperature to carry out a graft reaction, a graft product is obtained wherein 2,3-epoxypropyltrimethylammonium chloride is grafted to the oxygen atom of the hydroxymethyl group of sodium hyaluronate. By using the method, a graft product wherein 2,3-epoxypropyltrimethylammonium chloride is grafted to the oxygen atom of the hydroxymethyl group of sodium hyaluronate is obtained. Addition of salts is avoided during the reaction, a grafting yield up to 0.69 is obtained, and coagulation occurred to the product is effectively solved.

Abstract: The invention provides an engineered carboxylic acid reductase (CAR) enzyme, a nucleic acid encoding the CAR enzyme, and a non-naturally occurring microbial organism comprising an exogenous nucleic acid encoding the CAR, an engineered transaminase (TA) enzyme, and/or a hexamethylenediamine (HMD) transaminase (TA2) enzyme. The invention provides a non-naturally occurring microbial organism that has a 1,6-hexanediol (HDO) pathway with a HDO pathway enzyme expressed in sufficient amounts to produce 6 aminocaproate semi aldehyde, HDO, or both. The invention further provides a non-naturally occurring microbial organism that has an HMD pathway with a HMD pathway enzyme expressed in sufficient amounts to produce 6-aminocaproate semialdehyde, HMD, or both. The invention additionally provides bioderived HMD, 6-aminocaproate semialdehyde, and/or HDO and methods for producing bioderived HMD, 6-aminocaproate semialdehyde, and/or HDO.

Abstract: The disclosure relates to a non-natural flavin-dependent oxidase comprising at least one amino acid variation as compared to a wild type flavin-dependent oxidase, wherein the non-natural flavin-dependent oxidase does not comprise a disulfide bond, and wherein the non-natural flavin-dependent oxidase is capable of oxidative cyclization of a prenylated aromatic compound into a cannabinoid. The disclosure also relates to a nucleic acid, an expression construct, and an engineered cell for making the non-natural flavin-dependent oxidase. Also provided are compositions comprising the non-natural flavin-dependent oxidase; isolated non-natural flavin-dependent oxidase and methods of making the same; cell extracts comprising the non-natural flavin-dependent oxidase; and methods of making cannabinoids.

Abstract: The invention relates to a non-natural cannabinoid synthase comprising at least one amino acid variation as compared to a wild type cannabinoid synthase ?9-tetrahydrocannabinolic acid synthase (THCAS), comprising three alpha helices (?A, ?B and ?C) where a disulfide bond is not formed between alpha helix ?A and alpha helix ?C, wherein the non-natural cannabinoid synthase catalyzes the oxidative cyclization of cannabigerolic acid (CBGA) into a cannabinoid. The invention further relates to a non-natural ?9-tetrahydrocannabinolic acid synthase (THCAS), a non-natural cannabidiolic acid synthase (CBDAS), and a non-natural cannabichromenic acid synthase (CBCAS) comprising at least one amino acid variation as compared to a wild type THCAS, CBDAS, or CBCAS, respectively, comprising three alpha helices (?A, ?B and ?C) and wherein a disulfide bond is not formed between alpha helix ?A and alpha helix ?C.

Abstract: A flexible display screen cover plate, a flexible display module and a flexible display device are provided by the present application. The flexible display screen cover plate includes a composite laminated structure including at least one flexible glass layer and at least one organic layer that are laminated. By providing the composite lamination structure including the at least one flexible glass layer and the at least one organic layer and utilizing rigid characteristics of a glass material and flexible characteristics of an organic material, the flexible display screen cover plate with both a bendability and a sufficient hardness can be ensured, and the bendability of the flexible display screen cover plate can be improved.

Abstract: The present disclosure relates to an array substrate. The array substrate includes an active area; and a non-active area located outside the active area. The non-active area includes a flexible substrate having a surface provided with a number of grooves, and a peripheral metal wiring located in the number of grooves.

Abstract: Fingerprint identification control methods, touch panels and display devices are provided. The touch panel includes a substrate, a touch film layer arranged on a side of the substrate, an image processing module arranged on a position corresponding to a preset region of the touch film layer, and the image processing module includes a first module and a second module performing fingerprint identification and image capturing in a time share manner.

Abstract: A flexible display screen cover plate, a flexible display module and a flexible display device are provided by the present application. The flexible display screen cover plate includes a composite laminated structure including at least one flexible glass layer and at least one organic layer that are laminated. By providing the composite lamination structure including the at least one flexible glass layer and the at least one organic layer and utilizing rigid characteristics of a glass material and flexible characteristics of an organic material, the flexible display screen cover plate with both a bendability and a sufficient hardness can be ensured, and the bendability of the flexible display screen cover plate can be improved.

Abstract: The present invention relates to the field of plant molecular breeding, and provides methods for estimating additive and dominant genetic effects of single methylation polymorphisms (SMPs) on quantitative traits. The method comprises the following steps: 1) collecting samples and measuring phenotype in a natural population, and extracting genomic DNA from the samples; 2) constructing MethylC-seq libraries using the sample genomic DNA, and sequencing; 3) identifying the SMPs from the DNA methylation sequencing reads, and performing genotyping; and 4) performing epigenome-wide association study on the SMPs and the phenotypic data using a Mixed Linear Model (MLM), identifying SMPs that are significantly associated with the phenotype, and estimating the additive and dominant genetic effects. The method can provide a new technical guidance for gene marker-assisted breeding, and has important theoretical and breeding values.

Abstract: The invention relates to the technical field of gene expression detection, and provides methods for high-throughput detection of differential expression of plant circRNA allelic loci. The method comprises the following steps: 1) extracting total RNA of a plant sample, and constructing a strand-specific library; 2) performing paired-end sequencing on the strand-specific library with Illumina HiSeq; 3) screening circRNAs data from raw sequencing data; 4) extracting reverse splicing reads at a circRNAs looping position to form the circRNAs data; 5) performing single nucleotide variation detection on the reverse splicing reads; and 6) collecting statistics about the number of reads of different genotypes, which are aligned to SNP loci, in the reverse splicing reads, to align the proportion of the number of reads of different genotypes to the proportion of expression quantities of different genotypes. The methods can accurately detect differential expression of circRNA allelic loci with high throughput.

Abstract: A method for identifying plant lncRNA and gene interaction includes obtaining population SNP genotype data of the lncRNA and the gene; obtaining population expression abundance data of the gene in the studied tissue; and obtaining target trait population phenotypic data. When three restrictive conditions defined by the method are satisfied at the same time, it is indicated that the lncRNA and the gene are interacted with each other and together affect the phenotypic variation of the target trait of the plant. The method is used to accurately detect the interaction relationship between P. tomentosa lncRNA LNC-0052611 and gene Pto-COMT25, and the interaction relationship affects the phenotypic variation of a diameter at breast height of P. tomentosa.

Abstract: The present invention relates to the technical field of genetics and provides a method for detecting activity change of a transposon in a plant before and after stress treatment. The method includes the following steps: 1) respectively extracting total RNAs of samples before and after stress treatment; 2) respectively constructing cDNA libraries of the samples before and after stress treatment by using the total RNAs; 3) sequencing the cDNA libraries; 4) respectively screening siRNAs from raw sequencing data, and combining the screened siRNAs to obtain a total siRNA, and performing cluster clustering on the total siRNA; 5) extracting repeat in whole genome data by using repeatmasker software to obtain positional information of the plant whole genome transposon; and 6) obtaining activity change in the transposon of the plant before and after treatment by means of change in siRNA cluster expression quantity. The method fills the technical gap in the field of plant transposon activity detections.

Abstract: The present disclosure relates to an array substrate. The array substrate includes an active area; and a non-active area located outside the active area. The non-active area includes a flexible substrate having a surface provided with a number of grooves, and a peripheral metal wiring located in the number of grooves.

Abstract: Fingerprint identification control methods, touch panels and display devices are provided. The touch panel includes a substrate, a touch film layer arranged on a side of the substrate, an image processing module arranged on a position corresponding to a preset region of the touch film layer, and the image processing module includes a first module and a second module performing fingerprint identification and image capturing in a time share manner.

Abstract: Various embodiments provide a high precision belt weighing device and a high precision belt weighing method. An exemplary high precision belt weighing device includes a set of buffer carrier rollers provided between a first and second belt weighing scale frames. A volume scale hopper is provided above the set of buffer carrier rollers. A transfer conveyor is provided above the volume scale hopper. The first and second belt weighing scale frames, the volume scale hopper, an initial point detector, and a speedometer are connected with a weighing control instrument by cables. Cumulative weights of bulk materials handled by each of the first and second belt weighing scale frames, the corrected weight of bulk materials in the volume scale hopper, and a zero point in the length of a conveying belt detected by the initial point detector are displayed on the weighing control instrument.