3results about How to "Short test cycle" patented technology

This invention discloses a multi-pulse loading nonlinear response amplification test device and method for explosive structures, relating to the field of structural and material response simulation technology under impact loads. It includes a loading section and a structural response section. The loading section includes a projectile A, which has a large-diameter end and a small-diameter end. A projectile B is disposed outside the small-diameter end of projectile A, and a projectile C is disposed outside projectile B. An adjusting ring B is disposed at the end of projectile B near the large-diameter end of projectile A, and an adjusting ring C is disposed at the end of projectile C near the large-diameter end of projectile A. The masses of projectiles A, B, and C are equal. The structural response section includes a limiting block and a mass block, with a force transmission rod disposed between the limiting block and the mass block. The mass block has a loading through-hole and a mounting hole for the force transmission rod. This test device can achieve loading pulses of no less than 3 times, explosive pressure on the order of hundreds of MPa, and pressure amplitude amplification of approximately 1.9 times, with a short test cycle and low cost.

The application relates to a genetically engineered body, and particularly discloses a perilla frutescens PfCHLH gene and a virus-induced gene silencing system, a construction method and application of the gene silencing system. PfCHLH The nucleotide sequence of the gene is shown as SEQ ID NO. 1, and the amino acid sequence of the encoded protein is shown as SEQ ID NO. 2. PfCHLH The gene silencing fragment is cloned into a virus carrier pTRV2 to obtain a pTRV2- PfCHLH silencing carrier, and the pTRV2 carrier and the pTRV1 carrier are respectively transformed into agrobacterium GV3101 to prepare infection bacterial liquid; the infection bacterial liquid is mixed according to a volume ratio of 1:1 and then injected into perilla frutescens cotyledons to induce gene silencing. PfCHLH qRT-PCR verification shows that the expression amount is significantly down-regulated and a stable yellowing phenotype is generated; preferably, the OD 600 of the infection bacterial liquid is 0.6, the silencing phenotype is more significant, and the consistency is better. The perilla frutescens VIGS system established in the application is simple in operation, short in cycle, and high in efficiency, and can be used for rapid identification of perilla frutescens gene functions and verification and application of key genes in related metabolic pathways.

This invention relates to the field of experimental testing technology in oil and gas exploration and development, and particularly to a method for determining the effective porosity of shale oil samples based on two-dimensional nuclear magnetic resonance (NMR) technology. The method involves: preparing the target NMR sample using a freezing method, and calibrating the water and oil content values ​​separately; conducting water and oil distribution experiments on the sample, followed by pore characteristic experiments; calibrating the effective and ineffective pore regions and water and oil distribution regions of the sample's NMR signal, and providing different boundary delineation methods; calibrating the NMR signal obtained from the two-dimensional NMR, and delineating the effective and ineffective pore regions and oil and water distribution regions of the tested sample according to the boundary delineation methods; based on the shale pore properties, recovering the sample pore volume and performing two-dimensional NMR measurement to determine the total volume of the sample; obtaining data using oil-water data extraction methods, and combining this data with the total volume to obtain the effective porosity. The method provided by this invention is convenient, fast, has a short experimental cycle, and high production efficiency.