7results about How to "Avoid expensive" patented technology

The application provides a preparation method of a benzaldehyde aniline compound and relates to the technical field of organic synthesis. The preparation method provided by the application comprises the following steps: in a solvent, with an alkali as a promoter, under an atmosphere with an oxygen concentration of 20v100%, the temperature of a reaction system is controlled to be 50-70 DEG C, a diphenyl ketone compound I is reacted with an aniline compound II to generate a benzaldehyde aniline compound III, and the reaction product is subjected to column chromatography separation to obtain a pure benzaldehyde aniline compound III. The method has the beneficial effects that the reaction is simple, green and environment-friendly, the use of an expensive transition metal catalyst is avoided, the reaction condition is mild and controllable, and an environment-friendly byproduct is generated.

The invention relates to a spring force clamping connection for clamping a cable comprising an insulating sheath in an uninsulated manner, wherein at least one electrical conductor is arranged in the insulating sheath, wherein the spring force clamping connection has at least one busbar and a clamping spring, wherein the clamping spring has a clamping leg, which is configured for clamping the electrical conductor at a contact section of the busbar, and a bearing leg for spring force support of the clamping spring relative to the clamping leg. The invention also relates to a terminal having such a spring force clamping connection.

This invention relates to the field of backfill construction technology for building structures, and discloses a "sandwich" type anti-settlement construction method for high embankments in the first floor. The method includes: compacting the original soil in layers; pouring C15 plain concrete on the soil layers as a primary anti-settlement cushion layer and also serving as the foundation for the construction scaffold; after the scaffold is dismantled, pouring fluidized solidified soil with micro-expansion characteristics as a core "sandwich" layer to offset creep a second time, with a mix ratio of soil:solidifying agent:water = 10:1:3.5; and constructing C25 concrete with embedded steel mesh on the solidified soil as a tertiary anti-settlement cushion layer. This application can effectively control the settlement of high embankments through a "rigid-flexible-rigid" gradient reduction mechanism, utilizing the synergistic effect of multiple differentiated materials to ensure structural bearing capacity while avoiding the risk of ground cracking, realizing the resource utilization of waste soil, and significantly reducing construction and subsequent maintenance costs.

This utility model relates to the field of agricultural technology, specifically to a laser weeding machine, including a power supply, a mechanical mounting structure, a system main control unit, functional modules, a motor and its drive module. The functional modules are characterized by comprising a sub-control module, a characteristic spectrum storage chip, a spectrometer, a spectrometer light source, an optical path coupling module, and a laser. This utility model utilizes a right-angle prism to reflect the light emitted from the spectrometer light source and the laser from opposite directions, respectively. A stepper motor can precisely adjust the angle of the right-angle prism, ensuring that the two beams of light from the spectrometer light source and the laser can be focused on almost identical small areas. This improves the accuracy of beam positioning, enhances the reliability and efficiency of the system, and avoids the complex and expensive dichroic mirrors required in traditional laser weeding equipment, thus greatly simplifying the structure of the optical system and reducing production costs and technical implementation difficulties.

This invention discloses a method and system for rapid prediction of battery pack collision intrusion based on multi-fidelity data fusion. First, a training dataset containing high-fidelity and low-fidelity samples is constructed through finite element simulations with different mesh accuracies. Then, a two-level fusion model is established using Gaussian process regression. The predictions of the low-fidelity model are used as correction features to guide the high-fidelity model in accurate learning. Furthermore, based on an ensemble learning and Bayesian optimization framework, an improvement expectation criterion that incorporates simulation cost trade-offs is used for adaptive sampling. The location and accuracy level of newly added samples are intelligently determined, and the model is continuously optimized through iterative updates. This invention effectively resolves the contradiction between high-precision prediction and high computational cost, significantly reducing data acquisition overhead while ensuring prediction accuracy, providing an efficient and reliable technical means for battery pack collision safety assessment and optimization design.

This invention relates to a custom time-delay message processing method based on a distributed message queue, belonging to the field of distributed message queue technology. The method includes: a client receiving an arbitrary delay duration specified by the user, calculating a target Unix timestamp based on the client's current system time, and sending a message carrying that timestamp to a message broker layer; the message broker layer storing the message in a delay queue and inserting it into the corresponding time slot of a hierarchical circular time wheel according to the target Unix timestamp; the hierarchical circular time wheel consists of multiple levels of circular arrays, connected by an overflow mechanism; the message broker layer advances a global pointer at fixed time intervals, scans the messages to be scheduled in the time slots, and transfers expired messages from the delay queue to a regular queue for consumer consumption. This achieves flexible support for arbitrary delay durations and achieves task scheduling with O(1) time complexity through the hierarchical circular time wheel.

The invention discloses a suspension type maglev monorail high-speed train system, and belongs to the technical field of suspension type maglev rail transit. The system comprises a suspension type electromagnetic monorail subsystem and a vehicle-mounted permanent magnet suspension subsystem. The vehicle-mounted permanent magnet suspension rotor adopts a passageway type flexible rotor which is symmetrically arranged front and back and is formed by butting a traction permanent magnet rotor array and a magnetic suspension permanent magnet rotor array front and back, and a traction magnetic field passageway and a suspension magnetic field passageway are respectively formed; the suspension type electromagnetic monorail is embedded into the two passageways, and the functions of suspension, guiding and traction are integrated. The keel low-altitude channel is composed of a steel arch frame and a suspension long shaft, each suspension rail module can independently swing left and right, and the train automatically balances the gravity center when turning by being matched with the connection mode of a compartment and a bogie. The system has the advantages of simplified structure, low cost, high space utilization rate, strong wind resistance, high operation speed (more than 600km / h), no magnetic pollution risk and the like, has electromagnetic and mechanical two-stage redundant braking, and is safe and reliable.