6results about How to "Achieve direct conversion" patented technology

The invention provides an underground gasification method for generating methane through reaction of hydrogen and an underground coal seam and application, and relates to the technical field of underground in-situ methane production of coal. According to the method, hydrogen is injected into the underground coal seam and reacts in the presence of a catalyst under the heating and pressurizing conditions, methane-rich gas is directly generated, the methane content is 95% mol-98.5% mol, the H2 content is 0.1% mol-3% mol, and CO2 is smaller than or equal to 0.1% mol. The underground gasification method does not involve tedious steps of oxygen oxidation, carbon dioxide reduction and the like, coal is directly converted into methane, and simple production of methane is achieved; according to the method, the traditional coal mining process is changed fundamentally, the deep underground methane direct mining is really realized, the direct coal mining is converted into the direct gasification methane production, and the technical blank of generating the methane through the in-situ reaction of the hydrogen and the underground coal seam is filled.

This invention discloses an intelligent prediction method for deformation caused by deep foundation pit construction based on multi-source data fusion, belonging to the field of multi-source data fusion technology. By acquiring the corresponding measured deformation sequence Obs and comparing it with the deformation prediction sequence Pre, a prediction deviation process that changes over time is constructed. The prediction deviation is segmented to form a deviation segment set Seg, and morphological features describing the change mode of the prediction deviation are further extracted to construct a deviation morphology vector Mor. This realizes the quantitative expression of the evolution characteristics of the prediction deviation over time. Based on the deviation morphology vector Mor, the category of the evolution mode of the prediction deviation is determined and a morphology category set Cls is formed. Different prediction deviation evolution modes are mapped to clear deformation risk levels, forming a risk level set Grd and outputting the corresponding early warning result set Alt. This method can be used even when the deformation value has not significantly exceeded the limit but the prediction deviation has shown continuous amplification or rapid instability evolution.

A coal-fired magnetofluid supercritical CO2 combined cycle power generation system and method, the system includes a coal-fired magnetofluid generator, an air preheating system, a waste heat boiler and a supercritical CO2 cycle power generation system; the coal-fired magnetofluid generator of the present invention does not require rotating equipment, has a simple structure, and realizes direct conversion of thermal energy into electrical energy; the present invention can greatly improve the power generation efficiency and operation flexibility of the system by coupling the supercritical CO2 power cycle on the exhaust side of the coal-fired magnetofluid generator, increase the system compactness, and reduce the initial investment and power generation cost of the power station; at the same time, the system has a simple structure and less equipment, which can reduce the difficulty of system control and operation; the present invention uses the waste heat at the cold end of the supercritical CO2 power cycle to preheat the cold oxygen-enriched air, which can reduce the system cold source loss and improve the energy utilization efficiency. The present invention realizes the hierarchical and qualitative utilization of energy.

The invention discloses a clopidogrel chiral intermediate and an enzyme catalytic conversion method thereof, and the enzyme catalytic conversion method comprises the following steps: modifying nano silicon dioxide particles by using hydrophilic silane and hydrophobic silane to obtain modified silicon dioxide nano particles; taking the obtained modified nano silicon dioxide particles as a stabilizer, dissolving (R, S)-o-chlorophenylglycine methyl ester in a solvent to serve as an oil phase, taking a buffer solution containing protease as a water phase, and emulsifying through a homogenizer to obtain a Pickering emulsion enzyme catalysis reaction system; and putting the obtained reaction system on a constant-temperature shaking table to react, after the reaction is finished, carrying out centrifugal demulsification and separation to obtain an oil phase and a water phase, and concentrating and crystallizing the oil phase to obtain (S)-2-chlorophenylglycine methyl ester. According to the invention, the direct conversion of the enantiomer is realized under mild conditions, the utilization rate of the raceme is improved, and the enantiomer excess value of the obtained S-type isomer is high.

The application relates to the technical field of intelligent agricultural digital platforms, and discloses an intelligent agricultural data processing method and an intelligent agricultural digital platform, the method comprising the following steps: pre-processing target field image data, extracting a first parameter data set representing macroscopic growth trends of seedlings, extracting weak high-frequency texture information of early diseases and insect pests in a noise residual image of the image data as a second parameter data set representing local pathological conditions, and quantifying a pathological risk parameter through the second parameter data set; combining agricultural operation record data, performing seedling growth analysis, and outputting planting growth analysis results; and determining an agricultural operation strategy adjustment result according to the planting growth analysis results. The application is beneficial to solving the technical problem that it is difficult to give field data management and prospective prediction based on existing monitoring data in the existing agricultural technology.

This utility model belongs to the field of plastic bag production technology, specifically relating to a hot-pressing mechanism for I-beam bags, including: a main frame, and an upper hot-pressing unit and a lower hot-pressing unit disposed opposite to each other on the main frame; the upper hot-pressing unit and the lower hot-pressing unit respectively include an upper hot-pressing plate and a lower hot-pressing plate, the upper hot-pressing plate and the lower hot-pressing plate can move towards each other or away from each other along the height direction of the main frame, so as to heat-seal the bottom of the I-beam bag fitted on the lower hot-pressing plate into a flat surface. This utility model, by fitting the I-beam bag onto the fitted lower hot-pressing plate, can form inwardly folded surfaces on both sides of the bottom of the I-beam bag. Simultaneously, by utilizing the downward movement of the upper hot-pressing plate and the hot-pressing cooperation of the lower hot-pressing plate, the inwardly folded surfaces on both sides of the bottom of the I-beam bag are heat-pressed together, thereby forming a flat bottom self-standing bag, realizing the direct conversion from an I-beam bag to a flat bottom self-standing bag.