4results about How to "Avoid analytical errors" patented technology

This invention discloses a method, apparatus, equipment, and medium for determining the uniformity of a converted-wave observation system. The method includes: determining the target layer depth parameter and the target layer conversion parameter; determining the original conversion point of each original shot-receiver pair in the target layer based on the original shot point position, original receiver position, and target layer conversion parameter of each original shot-receiver pair corresponding to the common shot point; selecting a common conversion point from among the original conversion points, and moving other original conversion points and their corresponding original shot-receiver pairs to obtain new shot-receiver pairs corresponding to the common conversion point; determining the average receiver distance of the common conversion point based on each new shot-receiver pair, and determining the reference common-shot point conversion distance of the common conversion point based on the average receiver distance and the target layer conversion parameter; and determining the converted-wave uniformity of the common conversion point based on each new shot-receiver pair, the average receiver distance, the reference common-shot point conversion distance, and the target layer depth parameter. Embodiments of this invention can determine the uniformity of the observation system and guide the optimization of the observation system layout.

The utility model belongs to the technical field of environmental monitoring and water treatment, and particularly relates to an automatic chemical oxygen demand analyzer for industrial water treatment, which comprises a support base, two electric push rods, a mounting frame, a driving motor and the like, the two electric push rods are mounted at the top end of the support base side by side, the telescopic end of each electric push rod faces upwards, and the mounting frame is mounted on the support base. The mounting frame is mounted between the telescopic ends of the two electric push rods, the driving motors are distributed in two rows and two columns and mounted on the periphery of the mounting frame, and an output shaft of each driving motor faces downwards. Through cooperative work of an electric push rod, a mounting frame, a driving motor, a stirring rod, a sealing cover, a heating rod and a liquid adding assembly, automation and intelligence of a water quality analysis process are realized, the operation process is simplified, manual intervention is reduced, a more stable and reliable analysis result is provided, an enterprise is helped to better monitor and improve the sewage treatment process, and the sewage treatment efficiency is improved. And a higher environmental protection standard is achieved.

The invention relates to the technical field of crop disaster early warning, and provides a crop pest early warning method and system based on multi-modal perception. The method comprises the following steps: synchronously acquiring image and audio signals and preprocessing to obtain a standardized data packet; extracting visual feature vectors and acoustic feature vectors from the standardized data packet, and combining the visual feature vectors and the acoustic feature vectors into a node feature set; performing cross-modal fusion judgment on the basis of the node feature set, and generating a node state list containing pest existence and activity intensity indexes; performing spatial interpolation and time sequence prediction on the node state list, and constructing a pest dynamic risk field containing prediction risk information; and based on the pest dynamic risk field, applying a preset threshold to carry out risk partitioning, and generating a structured early warning instruction set. According to the method, a regionalized and prospective quantitative prevention and control basis is provided for farmland insect pests.

This invention discloses a method for synthesizing (1S,4R)-4-amino-2-cyclopentene-1-carboxylic acid methyl tartrate and its analytical method. The synthesis method includes the following steps: using methanol as the reaction medium, (±)-2-azabicyclo[2.2.1]hept-5-en-3-one reacts with an acylation reagent to obtain cis-4-amino-2-cyclopentene-1-carboxylic acid methyl tartrate hydrochloride; using methanol solution as the reaction medium, cis-4-amino-2-cyclopentene-1-carboxylic acid methyl tartrate hydrochloride is mixed with a resolving agent for resolution, followed by crystallization to obtain the target product (1S,4R)-4-amino-2-cyclopentene-1-carboxylic acid methyl tartrate. The method of this invention is more environmentally friendly, effectively solves the hidden danger of hydrogen chloride leakage, and optimizes the amount of tartaric acid by the solubility difference between the tartrate salts of (1S,4R) and (1R,4S) chiral enantiomers. A specific reversed-phase chiral chromatography method is used to detect the chiral purity of the product.