Abstract: A biomimetic desert beetle self-transporting bone microgrinding head and a preparation process thereof, and relates to the field of medical instruments. The microgrinding head includes a hydrophobic matrix or a matrix having a hydrophobic plating layer. The matrix has a hydrophobic surface on which several hydrophilic abrasive particles are uniformly distributed. A process for preparing the microgrinding head is: selecting diamond abrasive particles and conducting oxidization treatment of the diamond abrasive particles; forming a hydrophobic matrix by scanning a surface of the matrix with a laser; or alternatively obtaining a hydrophobic plating layer by a chemical modification method; and combining the oxidized diamond abrasive particles with the hydrophobic matrix or the hydrophobic plating layer by electroplating to obtain a microgrinding head.

Abstract: An intelligent production line for turning tool bit cavities and an application method are provided, which solve the problem that a production line in the prior art has low working efficiency. The intelligent production line has the beneficial effects of a compact arrangement structure, higher safety and improved working efficiency. The intelligent production line for turning tool bit cavities includes a robot. Material tables and at least one machining center are arranged around the robot. A transfer station used for transferring materials is arranged between the machining center and the robot. A protective fence is arranged between a position above the material tables and the robot, and between the transfer station and the robot. The robot is provided with a mechanical arm including a base plate. The base plate is provided with at least one clamping jaw and fixed with a laser detecting unit for detecting the materials.

Abstract: A process and a device for continuous flow side-chain alkylation which relate to the technical field of organic synthesis. In this process and the device for continuous flow side-chain alkylation, an ibuprofen raw material is prepared with alkylbenzene as a raw material. This raw material alkylbenzene is easily available and has a low cost, and is suitable for scale-up production. Moreover, an entire preparation process adopts continuous chemical synthesis, and a reaction time of each stage can be precisely controlled, which is beneficial to control a total reaction time and reduce an amount of impurities produced. In this way, a purity and a yield of the ibuprofen raw material are improved. In summary, a continuous synthesis method for side-chain alkylation of alkylbenzene provided by the present disclosure shows a low cost and a high yield.

Abstract: Medical material production and preparation, and a preparation method of a 4D chitosan-based thermosensitive hydrogel. First, chitosan is dissolved in acetic acid solution; a chitosan-based thermosensitive hydrogel is printed by a 4D bioprinter and lyophilized after solvent extraction, to obtain lyophilized chitosan; subsequently, aqueous ?-sodium glycerophosphate solution is prepared with ultrapure water and ?-sodium glycerophosphate, and then aqueous carboxymethyl chitosan solution is prepared with ultrapure water and aqueous ?-sodium glycerophosphate solution are charged into and mixed well with aqueous carboxymethyl chitosan solution to prepare a mixture; finally, the lyophilized chitosan is crosslinked with the mixture to obtain the 4D chitosan-based thermosensitive hydrogel. With scientific and reliable principles thereof, the present invention solves a problem that conventional thermosensitive hydrogels have uneven pore sizes, and improves the entrapment efficiency and ability of limbal stem cells.

Abstract: Provided in the present invention are a dynamic collection device for an oil film and temperature distribution in a grinding zone and an operating method thereof. A spectroscope and a 45-degree flat mirror are utilized to carry out optical imaging of the permeation and infiltration of the grinding fluid in a grinding zone during a grinding process, and a video signal imported into a high-speed camera is converted into a digital signal processed by a CCD photosensitive element, and a dynamic image is imported for dynamic collection. Infrared radiation emitted from the grinding zone is reflected through the 45-degree flat mirror, and transmitted to the thermal imaging camera, and the signal is transmitted to an internal infrared detector. The infrared detector adjusts and amplifies the received signal and outputs it to an infrared thermal imaging chip. After image processing, the temperature distribution image is imported for dynamic collection.

Abstract: A building construction robot is provided. The building construction robot includes a vehicle body, a feeding assembly is arranged in the vehicle body, a mounting frame is fixedly connected to one end of the vehicle body, and the mounting frame is located at a discharge end close to the feeding assembly. One end of a vibrating assembly is fixedly connected to one end of a top of the vehicle body, and the other end of the vibrating assembly passes through a middle part of the mounting frame. A leveling assembly is arranged at one end, away from the vehicle body, of the mounting frame, a measuring part is arranged at a top of the mounting frame, and a moving part is arranged at a bottom of the vehicle body.

Abstract: The present invention discloses a flexible sensor detection system for medical care and health, including: an information collection module, which uses a wearable device as a carrier, where flexible sensors are respectively arranged on the wearable device; an information transmission module, configured to wirelessly transmit collected information to an information processing and feedback module; and the information processing and feedback module, configured to perform grading treatment on received data information and feed back a health condition corresponding to the data information to the information transmission module, where the information transmission module compares feedback health condition data with a preset health threshold to determine whether to give an alarm. A heart rate ECG band, a breathing band, a shell temperature band, a blood flow rate band, a blood glucose band, a blood oxygen band, and a deep temperature band of the present invention are provided with the built-in flexible sensors.

Abstract: A road network balanced drainage method aimed at reducing urban waterlogging is disclosed. According to the drainage demand, the existing intersection elevation is changed or the intersection elevation that meets the drainage requirement is designed and implemented in new construction so that the intersection drainage is distributed according to the desired proportion; the water flowing to the water accumulation position is transferred to reduce the waterlogging degree. Through the analysis of the depth of water accumulation in the whole road network, the method of water flow distribution at the intersection is used to make the precipitation flow evenly distributed in the whole road network. The method can be used for solving serious water accumulation of a certain road section, the balanced drainage of the whole road network, the technical transformation of existing intersections, and for the planned and designed roads. The method can effectively eliminate and prevent urban waterlogging.

Abstract: A method for co-cultivation and directed differentiation induction of muscle satellite cells and adipose-derived stem cells is provided. The method includes the steps of co-cultivation and co-differentiation. The method for co-cultivation and directed differentiation induction of muscle satellite cells and adipose-derived stem cells provided by the present disclosure can allow the effective co-cultivation and co-directed differentiation induction of muscle satellite cells and adipose-derived stem cells from Larimichthys crocea, thereby providing a feasible solution for the large-scale production of high-quality cultivated meat.

Abstract: A digital twin modeling method to assemble a robotic teleoperation environment, including: capturing images of the teleoperation environment; identifying a part being assembled; querying the assembly assembling order to obtain a list of assembled parts according to the part being assembled; generating a three-dimensional model of the current assembly from the list and calculating position pose information of the current assembly in an image acquisition device coordinate system; loading a three-dimensional model of the robot, determining a coordinate transformation relationship between a robot coordinate system and an image acquisition device coordinate system; determining position pose information of the robot in an image acquisition device coordinate system from the coordinate transformation relationship; determining a relative positional relationship between the current assembly and the robot from position pose information of the current assembly and the robot in an image acquisition device coordinate syste

Abstract: An intelligent seed production apparatus and method based on multistage screening and bud eye identification includes a feeding module, a pre-cutting module, a bud eye identifying and cutting module, and a material mixing module. The feeding module can screen out seed potatoes with the mass and shapes meeting the requirements through a multistage screening mechanism. The pre-cutting module can receive the seed potatoes discharged from the feeding module, and cut each seed potato in half; the bud eye identifying and cutting module can receive the seed potato pieces discharged from the pre-cutting module and determine the weight of the seed potatoes and identify the bud eye distribution on the surfaces of the seed potatoes, and cut the seed potato into multiple required tubers, so that bud eyes are distributed on different tubers uniformly. The material mixing module can receive the cut tubers, and complete the material mixing of the tubers.

Abstract: A method for filling carbide blades in cutter head by using a carbide blade cutter head filling device. The carbide blade cutter head filling device includes a feeding unit, a storage unit, a loading unit and a discharging unit which are arranged successively. The output end of the feeding unit is matched with the input end of the storage unit through the guide mechanism. The output end of the storage unit faces a conveying tray of the loading unit. The conveying tray is provided with a plurality of group of transition holes for accommodating blades. A receiving mechanism for accommodating a cutter head is arranged below the falling pull plate of the discharging unit. The falling pull plate adjusts the communication and isolation between the transition hole and the cutter head in the receiving mechanism by changing the relative position of the falling pull plate and the transition hole.

Abstract: Equipment for self-positioning handling of aluminum profiles for rail vehicle, including a handling and lifting mechanism, a steel beam fixed on and being driven to lift by the mechanism, 2-DOF spatial mechanisms fixed on the steel beam and mechanical clamping jaws fixed on a clamping jaw connecting seat; the 2-DOF spatial mechanisms includes a cylinder supporting seat, four connecting members on an outer ring of the cylinder supporting seat hinged respectively to four first connecting rods; wherein, two of the first rods are hinged to first ends of two ball joint connecting rods of which second ends are hinged to the clamping jaw connecting seat; the other two first rods are hinged to first ends of two second connecting rods of which second ends are hinged to the clamping jaw connecting seat; a piston rod of a cylinder center of the cylinder supporting seat driving the clamping jaw connecting seat.

Abstract: An intelligent separation method of peanut kernel and red coat, feeding peanuts to be removed red coats into a device for a gas explosion of the red coats of the peanuts, to complete a preliminary separation of kernels and the red coats of the peanuts; feeding the primarily separated kernels and peanut red coats of the peanuts into the drying device to fully separate the red coats from the kernels; delivering the fully separated peanut kernels and red coats of the peanuts into a negative pressure adsorption device to collect respectively the fully separated kernels and red coats of the peanuts with different densities and qualities by a negative pressure adsorption mode, finally obtaining the kernels of the peanuts without the red coats, and the red coats of the peanuts respectively.

Abstract: A method and device for separating and recovering heavy metal ions through membrane-forming mineralization fixation, applicable in the domain of acid wastewater treatment containing heavy metal ions. The process involves mixing composite mineral particles with heavy metal acidic wastewater, then conducting a first hydration reaction under static conditions. This leads to adsorption, precipitation, and crystallization of heavy metal ions in the wastewater via a colloidal liquid membrane, resulting in particles coated with a mineralized membrane. These particles exhibit a gap between the mineralized membrane and their core. The next step is to separate these coated particles and recover them. The preparation of composite mineral particles involves mixing sodium carbonate/sodium silicate, bentonite, carbide slag, and water, followed by a second hydration reaction and subsequent granulation, aging, and dehydration condensation. The particle sizes of both bentonite and carbide slag are maintained at ?74 m.

Abstract: A process system of a follower fixture for tank moving support is provided and includes a conveying table slidably provided with a bearing platform through a screw slide rail assembly and provided with an outer frame assembly; a lifting platform is slidably installed in the outer frame assembly; positions of the lifting platform and the bearing platform are corresponded up and down; the outer frame assembly is slidably provided with a robot component; both sides of the conveying table are provided with loading platforms; workpieces are placed on one loading platform, and a fixture system is placed on the other loading platform; the fixture system and the workpieces are both placed in the moving range of the robot component, and positions of the fixture system and the workpieces are corresponded. problems including processing flexibility cannot be realized can be solved.

Abstract: Disclosed are an iron-based catalyst and its application catalytic diene polymerization. The iron-based catalyst provided by the present application includes iron-containing organic compounds, alkyl aluminum compounds and isocyanide-containing organic compounds, and the molar ratio between the iron element of the iron-containing organic compounds, the alkyl aluminum compounds and the isocyanide-containing organic compounds is 1:(5˜100):(0.5˜100). The iron-based catalyst system of the present application can initiate polymerization of diene with high activity at high temperature by using isocyanide-containing organic compounds as an electron donor and alkyl aluminum compounds as a co-catalyst.

Abstract: Disclosed is a method of adjusting the molecular weight of syndiotactic 1,2-polybutadiene prepared using an iron-based catalyst. In the present application, when an iron-based catalyst catalyzes the polymerization of butadiene to prepare syndiotactic 1,2-polybutadiene, alpha-olefins are added as a molecular weight regulator, and a chain transfer effect is achieved through competitive adsorption. At the same time, since alpha-olefins are stable to iron-based catalysts, cannot be initiated to polymerize, and are easy to separate from butadiene, they have a significant effect on molecular weight regulation and do not have a significant effect on activity, making it possible to prepare syndiotactic 1,2-polybutadiene thermoplastic elastomers with number average molecular weights ranging from 3,000-250,000. The syndiotactic 1,2-polybutadiene rubber prepared by the present application has better processability.

Abstract: An integrated triaxial shear and seepage experimental method for hydrate-bearing sediments and device thereof is provided, relating to the field of geotechnical experiments technologies. The method includes the following steps: generating hydrate; preparing a shear and seepage coupling experiment; and performing the shear and seepage coupling experiment. According to a special integrated experimental device, that coupling analysis of seepage and stress in a triaxial shear breakage process of the hydrate can be realized, and different experiments that are liquid seepage experiment and the gas-liquid seepage experiment can be realized.

Abstract: The disclosure relates to a method for improving the alkali resistance and oxidation resistance of a benzothiazole disperse dye, and belongs to the field of disperse dyes. In the disclosure, 4 kinds of diazo components and 8 kinds of coupling components are used in designing and synthesizing 28 thiazole heterocyclic azo disperse dyes, and the alkali resistance and oxidation resistance of the disperse dyes are improved. Structure confirmation is performed on the synthetic disperse dyes, and the alkali resistance, oxidation resistance and other dyeing properties of the disperse dyes are tested.