36results about How to "Avoid or minimize damage" patented technology

The invention relates to a negative electrode active substance of lithium ion battery and battery thereof, which belongs to the field of battery. The negative electrode active material of lithium ion battery comprises a first active substance A and a second active substance B, wherein the first active substance A is lithium titanate with following structural formula: Li(1+x)Ti(2-x)O4, and x is not less than 0 and not larger than 1 / 3; and the second active substance B is other active substances capable of doping / undoping lithium except lithium titanate. The mass mixture ratio A / (A+B) of the first active substance A and the second active substance B is between 0.05 and 0.5. The Li(1+x)Ti(2-x)O4 (x not less than 0 and not larger than 1 / 3) can be added into the negative electrode of an lithium ion secondary battery as an overdischarge-resistant active substance to effectively control the acute decrease speed of the battery voltage by a second discharge platform occurred at the final discharge stage, thus obviating or reducing the damage to the battery or the battery pack caused by overdischarge or reverse polarity. The negative electrode active substance is suitable for fabricating lithium ion secondary battery in serial battery pack.

The invention relates to a positive electrode active substance of lithium ion battery and battery thereof, which belongs to the field of battery. The positive electrode active material of lithium ion battery comprises a first active substance A and a second active substance B, wherein the first active substance A is lithium niobate with following structural formula: LixNbyOz,; and the second active substance B is other active substances capable of doping / undoping lithium except lithium titanate. The mass mixture ratio A / (A+B) of the first active substance A and the second active substance B is between 0.05 and 0.5. The LixNbyOz has stable lithium doping / undoping performance, good cycle performance, low lithium doping / undoping potential about 1.7V (for Li<+> / Li) and wide charge / discharge platform. The invention can effectively postpone the acute decrease speed of the battery voltage and obviate or reduce the damage to the battery or the battery pack caused by overdischarge or reverse polarity. The positive electrode active substance has excellent overdischarge-resistant performance and is suitable for fabricating lithium ion secondary battery in serial battery pack.

The invention discloses a threshing device of a combined harvester. The threshing device comprises a threshing barrel and a sieve plate. The sieve plate is matched with the threshing barrel, the threshing barrel comprises a barrel wall, a plurality of rows of threshing columns and first springs, the multiple rows of threshing columns are uniformly arranged along the whole barrel wall, and the adjacent threshing columns are connected with one another by the first springs; the threshing columns comprise static columns and movable columns, the static columns are fixedly arranged on the barrel wall, and the movable columns are axially hinged to the barrel wall; the movable columns comprise first wall outer portions and first wall inner portions, the first wall outer portions are positioned onthe outer side of the barrel wall, the first wall inner portions are positioned on the inner side of the barrel wall, the static columns comprise second wall outer portions and second wall inner portions, the second wall outer portions are positioned on the outer side of the barrel wall, and the second wall inner portions are positioned on the inner side of the barrel wall; the heights of protrusions of the first wall outer portions are higher than the heights of protrusions of the second wall outer portions; the first wall inner portions are separated from the second wall inner portions, andthe adjacent second wall inner portions which are positioned on upstream of the rotation directions are connected with one another by the first springs. The threshing device has the advantages that good threshing effects can be realized by the threshing device, and the threshing device cannot be easily jammed or damaged.

The invention discloses a salinized soil roadbed construction method and a salinized soil roadbed. The salinized soil roadbed construction method comprises the steps that shallow soft soil with a preset depth is dug out from a salinized soil road section, then gravelly soil is laid and packed layer by layer, and the preset depth is 48-53 cm. Aiming at the special characteristics of salinized soil, the construction method adopts a mode of replacing and packing gravel soil with a specific thickness for shallow soft soil and adopts layered paving and packing, is simple and convenient in construction, simple in equipment, cheap in stock ground, capable of repeatedly utilizing field conditions, safe and reliable, and capable of effectively guaranteeing engineering quality and construction benefits; and damage to the roadbed and the pavement caused by saline soil is avoided or reduced.

The invention provides ceramic calcium phosphate bone cement and a preparation method thereof. The preparation method of the ceramic calcium phosphate bone cement comprises the following steps: preparing beta-TCP ceramic particles; distilled water is selected as a liquid phase of the ceramic calcium phosphate bone cement; and carrying out self-curing reaction on the beta-TCP ceramic particles and monocalcium phosphate powder in the liquid phase to obtain the ceramized calcium phosphate bone cement. The plastic ceramic calcium phosphate bone cement and the injection ceramic calcium phosphate bone cement are respectively formed by adopting preparation processes of a mixing method and a blending method. According to the technical scheme, the ceramic calcium phosphate bone cement is higher in chemical stability, better in operability, higher in mechanical property and more controllable in degradability; and particularly, inflammatory response and damage to tissues and organs caused by the generation of the degraded particles can be avoided or reduced after the implant is implanted into a body.

The invention discloses a bicycle rear-end collision warning protection device. The bicycle rear-end collision warning protection device comprises a rear axle, a first side column, a second side column, a first transverse column, a protection frame, a first distance sensor, a second distance sensor, an alarm tail lamp, a first spring, a second spring, a third spring, a fourth spring, a buffer assembly, a collision protection rod and a telescopic rod. The bicycle rear-end collision warning protection device is characterized in that the protection frame is of a U-shaped structure formed in a waythat the first side column, the second side column and the first transverse column are connected end to end in sequence; the first side column and the second side column are fixedly installed on theaxle of a rear wheel of a bicycle respectively; and the first distance sensor is arranged on the outer side of the first side column, and the second distance sensor is arranged on the outer side of the second side column.

The invention discloses an air wall type extractor hood. The air wall type extractor hood comprises a suspended hood, and is characterized by further comprising a cooking fume filter and a blowing groove; and an exhaust port of the suspended hood is connected with the cooking fume filter, a filter outlet of the cooking fume filter is connected with the blowing groove, and a blowing opening formingan air wall upwards is formed in the upper portion of the blowing groove. According to the air wall type extractor hood, the cooking fume filter is used for filtering cooking fume sucked by the suspended hood, filtered gas is blown out through the blowing opening of the blowing groove, the air wall for isolating a user from a furnace end is formed, and the defect that when the furnace end is used, the cooking fume is directly absorbed by the user, so that health is damaged, or the cooking fume is directly exhausted to indoor space, so that furniture, electric appliances and the like are contaminated is avoided. The cooking fume is absorbed by the cooking fume filter without being exhausted outdoors, and damage to a wall body or prearrangement of an exhaust hole or else can be avoided. Theair wall type extractor hood is convenient to use, easy to mount and dismount and convenient to move. Furthermore, after the formed air wall absorbs heat in winter, a certain warming effect is achieved for the user.

The invention discloses a dust removal system device suitable for purifying flammable and explosive dust. The dust removal system device comprises a dust removal box body and an inert powder feeding box, supporting legs are arranged at the bottom of the dust removal box body, an alarm is arranged at the top of the dust removal box body, an air inlet is formed in one side of the alarm, a powder feeding pipeline is arranged on the air inlet, and the inert powder feeding box is arranged at one end of the powder feeding pipeline. The device has the beneficial effects that by arranging the inert powder dosing box, the external pressure air source and the automatic control box, inert powder is continuously added in proportion, flammable and explosive dust is inerted into intrinsic safety type dust, by arranging the explosion venting bin, explosion caused by special conditions is prevented, explosion pressure is released upwards, and damage to personnel and equipment is effectively avoided orreduced; the dust neutralization bin is arranged so that space is provided for sufficient mixing of gas carrying flammable and explosive dust and inert powder, mixing is more sufficient, and the dustneutralization efficiency is greatly improved.

A method for preparing mesenchymal stem cells by fully utilizing umbilical cord resources includes the steps of washing off most of residual blood on an umbilical cord; preparing the umbilical cord into tissue fragments, and digesting the tissue fragments by collagenase II; adding a tissue block obtained from collagenase digestion into an eluent to centrifuge so as to separate unpurified primary umbilical cord mesenchymal stem cells; grafting the obtained primary stem cells to a plastic culturing container by 5.0x104 / cm<2>-1.0x105 / cm<2>; digesting after the cells attaching to the bottom of the plastic culturing container is fused by more than 80%; purifying after digestion and dispersion according to needs. The method has the advantages that the limited umbilical cord resources can be fully made use of, unnecessary waste can be reduced, prepared tissue volume can be increased, the umbilical cord mesenchymal stem cells with effective bioactivity can be extracted by making full use of all mesenchymal stem sources, and high-yielding mesenchymal stem cells contained in the umbilical cord can be obtained.

The present invention provides a protective gear for the sacral area, comprising: an upper side belt 1; a lower side belt 2; a pair of back support strips 3; a part 4 of the stitching area of ​​double stitches; elastic foam 5; a fixed adhesive tape 6 , the upper and lower side straps, the back support strip, and the elastic foam are partly connected with the double stitching seam area to prevent them from being separated from each other due to excessive force, and the upper and lower side straps are used to fasten the adhesive tape on the The stitching position of the lower belt keeps the sacrum area protector close to the user's back and sacrum area on the user's abdomen. The arc of the back support bar is roughly consistent with the user's back bending, and the lower belt acts as a rigid support. And make the back support bar fit the user's back and sacrum area, prevent the back support bar from arching when the user squats back, and the elastic foam fits the user's buttocks and sacrum area through the connection with the lower side belt , to provide cushioning when the user squats back on the ground, avoiding or reducing damage to the sacrum area.

The invention provides an auxiliary driving system for a motorcade, a vehicle comprising the auxiliary driving system, a corresponding method, computer equipment and a computer readable storage medium. The auxiliary driving system comprises a danger determination unit which is configured to determine whether there is a collision danger between traffic participants behind a motorcade and a tail vehicle of the motorcade, a road condition detection unit which is configured to detect road condition information in front of the motorcade, and a decision providing unit which is configured to provide a decision for the motorcade according to the road condition information in response to determining that the collision danger exists. By means of the scheme, the possibility that the motorcade collides with the traffic participants behind the motorcade can be avoided or reduced, or the range affected by collision and damage caused by collision are reduced, and the driving safety of the motorcade on the road is improved.

The invention discloses a semiconductor structure manufacturing method, which comprises the following steps of: providing a substrate, wherein the substrate is divided into a fuse region with a fuse structure and a bonding pad region with a bonding pad, the fuse structure comprises a first anti-etching layer on a surface layer and the bonding pad comprises a second anti-etching layer on the surface layer; forming a protective layer; forming a photoresist layer on the protective layer, patterning the photoresist layer and forming an opening in the photoresist layer, wherein the opening exposesthe protective layer at a part of a bonding pad position, at a fuse structure position and on the two sides of the fuse structure position; performing primary etching until the first anti-etching layer of the fuse region and the second anti-etching layer of the bonding pad region are exposed at the same time; and performing secondary etching to remote the second anti-etching layer on the surface layer of the bonding pad and the first anti-etching layer on the surface layer of the fuse structure. In the method, a process of performing single photoetching and then sequentially performing the primary and secondary etching is adopted to reduce photoetching times.

The umbrella comprises an umbrella body, and the umbrella body comprises an umbrella cover, an umbrella rod and umbrella ribs; the umbrella cover is arranged at one end of the umbrella rod, and the umbrella ribs are arranged on the inner surface of the umbrella cover and used for supporting the umbrella cover; an air purification unit is arranged on the umbrella body and is used for implementing air purification operation; a dust collection unit is arranged on the umbrella body and is used for adsorbing and / or collecting pollution particles generated by air purification; a smoke detection unitis arranged on the umbrella body and is used for detecting smoke information of the environment; and a control unit is arranged on the umbrella body and is used for controlling the air purification unit, the dust collection unit and the smoke detection unit. Through the scheme of the embodiment, emission reduction of smoke pollutants is achieved, local space pollution caused by second-hand smokeis reduced, transfer and diffusion of the pollutants are reduced, pollution particles can be cleaned in time, the dust collection effect is enhanced, the dust collection efficiency is improved, and therefore the smoke treatment efficiency is improved.

The present invention relates to compositions for treating keratinous substrates, such as hair, comprising 3-butoxypropylamine and at least one carboxylic acid; and to systems and methods for treating keratinous substrates with said compositions.

The present invention provides a window covering with a control mechanism for raising and lowering the window covering. The control mechanism provides a separator system. More particularly, the present invention relates to a control mechanism having a separator system that provides a disconnect function to prevent or reduce damage to the control mechanism due to inadvertent force applied to the window covering. The decoupler system has a body movable between an engaged position in which the clutch axle and winding axle move simultaneously, and a disengaged position in which the winding spool It is then independently rotatable relative to the clutch axle.

The invention discloses a threshing device of a combined harvester. The threshing device comprises a threshing barrel and a sieve plate. The sieve plate is matched with the threshing barrel, the threshing barrel comprises a barrel wall, a plurality of rows of threshing columns and first springs, the multiple rows of threshing columns are uniformly arranged along the whole barrel wall, and the adjacent threshing columns are connected with one another by the first springs; the threshing columns comprise static columns and movable columns, the static columns are fixedly arranged on the barrel wall, and the movable columns are axially hinged to the barrel wall; the movable columns comprise first wall outer portions and first wall inner portions, the first wall outer portions are positioned onthe outer side of the barrel wall, the first wall inner portions are positioned on the inner side of the barrel wall, the static columns comprise second wall outer portions and second wall inner portions, the second wall outer portions are positioned on the outer side of the barrel wall, and the second wall inner portions are positioned on the inner side of the barrel wall; the heights of protrusions of the first wall outer portions are higher than the heights of protrusions of the second wall outer portions; the first wall inner portions are separated from the second wall inner portions, andthe adjacent second wall inner portions which are positioned on upstream of the rotation directions are connected with one another by the first springs. The threshing device has the advantages that good threshing effects can be realized by the threshing device, and the threshing device cannot be easily jammed or damaged.