49results about How to "Avoid rearrangement" patented technology

The invention discloses a transparent ceramic orthodontic bracket and a preparation method thereof. The transparent ceramic orthodontic bracket comprise the following components in parts by weight: 80-90 parts of nano aluminum oxide and 10-20 parts of a binder, wherein the binder comprises the following five parts: a first part is a low-molecular component containing at least one of paraffin, microcrystalline wax, bee wax, EBS wax and PE wax, a second part is a catalytic component, namely homo-polymerized polyformaldehyde with a high melt index; a third part is a skeleton component containingat least one of polypropylene, polyethylene, an ethylene-vinyl acetate copolymer, POE and polystyrene; a fourth part is a plasticizer; and a fifth part is an organic silicon dispersing agent. The transparent ceramic bracket is high in density, few in air holes, high in light transmission and high in three-point bending strength.

The invention discloses a method for preparing 7-hydroxydehydroabietic acid, which comprises the following steps of: 1, adding 2 mass parts of rosin into 5 to 100 mass parts of organic carbon having 2 to 6 carbon atoms, stirring the mixture uniformly, and heating the mixture to fully dissolve the rosin; 2, adding the dissolved rosin solution into a fixed bed reactor filled with oxidant, keeping the temperature of the fixed bed reactor at 30 to 70 DEG C, and obtaining 7-hydroxydehydroabietic acid solution; and 3, filtering the 7-hydroxydehydroabietic acid solution, and performing distillation,re-crystallization and vacuum drying to obtain a pure 7-hydroxydehydroabietic acid product. The rosin is directly used as a raw material, so the steps are simplified, and the cost is saved; and the low-cost oxidant is used, the reaction is quick, and the yield of the 7-hydroxydehydroabietic acid reaches over 75 percent.

The invention discloses high-compactness modified alkaline phenolic resin self-hardening sand for pump valve castings. An adopted modified phenolic resin adhesive in the resin sand has the advantages that the viscosity is low, the bonding strength is high, the plasticity is good, the brittleness is low, the contents of free phenol and free formaldehyde are lower, the use amount is lower, the hardening speed is decreased, and the like, so that the use and reuse performance of the molding sand can be effectively improved; through the addition of polylactic acid fiber and porous polypropylene fiber added in the sand, the thermoplasticity time during the casting pouring process is longer, the stress generated after sand heating is relieved, the retention time of a sand mold is prolonged, the castings are prevented from cracking, the air permeability is improved, the rearrangement and densification of the sand are facilitated in the fiber low-temperature fusion introduction instant liquid state, and the precision of pump valve castings is improved.

The invention discloses an adhesive as well as a preparation method and application thereof. The adhesive is prepared from, by weight, 3-10 parts of low-molecular-weight wax components, 20-50 parts of1 # polyacrylic resin, 0-30 parts of 2 # polyacrylic resin, 5-15 parts of high-temperature decomposition resin, 0.5-2 parts of plasticizer and 0.1-3 parts of dispersing agent. The preparation methodof the binder comprises the following steps of: (1) weighing the components; (2) performing stirring at high temperature; and (3) performing crushing and granulating. The binder is used for preparingaluminum oxide or zirconium oxide thermal degreased injection-molded ceramic. An injected ceramic green body applying the binder can be directly subjected to whole-course thermal degreasing, is smoothin feeding surface, is high in strength, is good in flowability and easy to automatically produce; the prepared injection-molded ceramic product has few pores, high density, high hardness and strength and excellent comprehensive performance.

Disclosed is a method for preparing a nucleic acid probe-coated porous solid support strip. The method includes linking a nucleic acid probe to a carrier to prepare a conjugate and immobilizing the conjugate on a porous solid support by vacuum transfer.

The invention discloses a winding drum with cable guide grooves. The winding drum mainly comprises an H-shaped shaft and threaded tracks. The threaded tracks which are neatly arrayed are arranged on the surface of the H-shaped shaft and are of groove-shaped structures, the widths of grooves are matched with the diameters of cables, and the depths of the grooves are matched with the radiuses of the cables. The winding drum with the cable guide grooves has the advantages that the threaded tracks can be in modes for assisting in preventing rearrangement and mistaken arrangement of the cables, and accordingly conditions such as cable compression, disorder and squeezing can be prevented by the threaded winding drum under double protection effects of inspection mechanisms and the threaded tracks; the winding drum is simple in structure, reasonable in design and suitable to be widely applied to industries with requirements on winding displacement equipment.

The invention discloses a node data processing method and a system based on Html. The method includes: obtaining web resources based on Html; generating nodes including a DOM object n by parsing web resources withJavascript language, wherein the web page resources include static resources and dynamic resources, and the static resources include Javascript script files; merging Javascript script files; rendering the DOM object and displaying the Web page. The technical scheme of the invention can at least perform real-time data display for a node diagram with a large amount of data.

The invention discloses a VBA-based hospital outpatient pharmacy scheduling method, which adopts a greedy algorithm and a backtracking algorithm to obtain an approximate solution of scheduling, accurately realizes full-class and full-period scheduling of all staff of hospital outpatient pharmacy, reduces repeated work of simple work, reduces and checks low-level errors such as missed scheduling, multiple scheduling and wrong scheduling, improves the scheduling efficiency, and enhances the accuracy; meanwhile, a scheduling table checking function is provided, a full scheduling table is checked, and missed scheduling, excessive scheduling and wrong scheduling caused by manual adjustment of the scheduling table are avoided; the preset constraint conditions conform to the hospital outpatient pharmacy scheduling rule, the method can be popularized to the pharmacy in a similar scheduling mode, and the constraint conditions for the work shift and the rest shift can promote the enthusiasm of the pharmacy scheduling personnel in the actual work, relieve the work fatigue and ensure sufficient rest.

A mirror for the EUV wavelength range (1) having a layer arrangement (P) applied on a substrate (S), the layer arrangement having a periodic sequence of individual layers, where the periodic sequence has at least two individual layers—forming a period—composed respectively of silicon (Si) and ruthenium (Ru). Also disclosed are a projection objective for microlithography (2) including such a mirror, and a projection exposure apparatus for microlithography having such a projection objective (2).

This invention relates to transmitter and receiver terminals that transmit and receive real-time streaming data via a network. This invention achieves reduction of ultimate transmission delay time by avoiding the occurrences of reorders themselves. In the transmitter terminal (1), a padding request accepting unit (103) receives a padding request packet transmitted by the receiver terminal (2). Based on an instruction from the padding request accepting unit (103), a packet padding unit (102) pads a packet, which has been generated by a data generating unit (101), such that the packet length of the packet is equal to or greater than a particular length. The packet padding unit (102) then transmits the packet as padded to a network (10). In the receiver terminal, a reorder condition analyzing unit (201) analyzes the reorder-occurrence condition of the packet received from the network. Based on an analysis result received from the reorder condition analyzing unit (201), a padding requesting unit (204) generates and transmits a padding request packet to the transmitter terminal. A data reproducing unit (203) reproduces the packet received by the reorder condition analyzing unit (201).

The embodiment of the invention provides a brand-new synthesis method of the 6,6-dialkyl piperidine-2-carboxylic acid compound; a compound I, trifluoroacetic acid, sodium hydroxide and the like are used as raw materials, and the target product 6,6-dialkyl piperidine-2-carboxylic acid is obtained through two-step reaction. The synthesis method provided by the embodiment of the invention has the advantages of simple operation, mild reaction conditions, high yield, environmental friendliness, low production cost and the like, and is suitable for industrial large-scale production.