150results about How to "Not easy to swing" patented technology

An automobile active pedestrian collision avoidance test device is provided which comprises a driving mechanism and a transmission mechanism which are arranged at intervals. A Conveyor belt is arranged between the driving mechanism and transmission mechanism and is laid on a traveling plane of an automobile. The conveyor belt is in driving connection with the driving mechanism and the transmission mechanism and is driven by the driving mechanism in order to achieve driving between the driving mechanism and the transmission mechanism. A travelling mechanism is used for providing a dummy person, is disposed on the conveyor belt and moves with the conveyor belt. Compared with an existing portal frame test device, the automobile active pedestrian collision avoidance test device, on the one hand, is lower in weight and smaller in size and is easy to carry; on the other hand, the travelling mechanism is supported on the ground by the conveyor belt, and the dummy person is not easy to swing to ensure the accuracy of the test.

The invention discloses a variable-screw-pitch device used for changing the screw pitch of a blade. The variable-screw-pitch-device comprises a fixing seat, a connecting rod, and a transmission assembly, wherein the connecting rod is used for penetrating a rotational main shaft adopted to drive the blade to rotate; the connecting rod is movably and oppositely connected with the fixing seat; the transmission assembly is connected with the fixing seat, and comprises a blade mounting seat used for mounting the blade; the blade mounting seat is connected with the connecting rod, and is used for changing the screw pitch of the blade by adopting the connecting rod to drive the blade mounting seat to rotate when the connecting rod performs reciprocating motion relative to the rotational main shaft. According to the variable-screw-pitch device provided by the invention, the connecting rod penetrates through the rotational main shaft, so that the variable-screw-pitch device is miniaturized; besides, the invention further discloses a rotor wing assembly and a multiple rotor wing aircraft, which adopts the variable screw pitch device.

A rope reeving structure simply constructed, highly responsive, and capable of coping with high lifting height and high speed applications. Two sets of ropes (71, 72, and 75, 76), each set being composed of two ropes (71, 72, or 75, 76), pulled out of a drum (16) are mounted at longitudinally opposite ends of a lifting device (8) such that the ropes (71, 72, and 75, 76) form triangles (a-d) between the lifting device (8) and a trolley (6) and such that the oblique sides (x1 (x5), x2 (x6)) of triangles face directions separating from each other. Two sets of ropes (74, 78, and 73, 77), each set being composed of two ropes (74, 78, or 73, 77), pulled out of the drum (16) are mounted at lateral opposite ends of the lifting device (8) such that the ropes (74, 78, and 73, 77) form triangles (e-h) between the lifting device (8) and the trolley (6) and such that the oblique sides (x8 (x4), x7 (x3)) of triangles face each other. All the triangles (a-h) formed by the ropes (71-78) are in congruence.

The invention discloses an automatic assembling machine for a spring pen nib. According to the technical scheme, the automatic assembling machine for the spring pen nib is characterized by comprising a rack and further comprising a rotary material disc, a first vibration disc, pen nib feeding seats, a second vibration disc, spring feeding seats, a point pinching mechanism, a finished product discharging mechanism, a pen nib detection mechanism, a spring detection mechanism, a non-finished-product unloading mechanism and a finished product unloading mechanism; a pen nib is clamped firmly relatively and is not likely to swing, and the pen nib is more stable when being moved; and due to the fact that the pen nib clamping effect is firm and stable through the structure, the two sets of pen nib feeding seats and the two sets of spring feeding seats are arranged, double-material double output is achieved, and the assembling efficiency is obviously improved.

The invention discloses a height adjustable bathroom shower nozzle which comprises a base and a shower nozzle. A plurality of shower nozzle fixing rings are made on the base at equal intervals; a tank body is formed behind the shower nozzle fixing rings; one surface of the shower nozzle is provided with water outlet holes; the lower part of the shower nozzle is connected with a shower nozzle neck; the shower nozzle neck can be hung inside the shower nozzle fixing rings; the lower end of the shower nozzle neck is connected with a water pipe; the rear of the shower nozzle neck is provided with a fixing sheet; and when the shower nozzle neck is hung inside the shower nozzle fixing rings, the fixing sheet can be just inserted into the tank body to take an effect of fixing the shower nozzle. According to the height adjustable bathroom shower nozzle, the height of the shower nozzle can be regulated, and a good fixing property is achieved; the height adjustable bathroom shower nozzle is more convenient to use; and the product disclosed by the invention has a simple structure, is low in production cost and is easier to popularize.

The invention relates to a swing type bearing roller installation tool, which includes a support, and a bearing inner frame fixing seat is arranged in the middle of the support. Outer frame pressing device; the bearing outer frame pressing device includes two sets of pushing mechanisms, the pushing mechanism includes a sliding block that is slidably connected with the support and a linear drive mechanism installed on the support for pushing the sliding block, one of the sliding blocks There is a bearing outer frame supporting mechanism on the upper part, and a bearing outer frame pushing mechanism is arranged on the other sliding block; the bearing outer frame supporting mechanism includes two mirror-symmetrical clamping arms arranged on one of the sliding blocks, and the other sliding block The compression mechanism driven by air pressure on the block is also provided with a supporting frame on the two sliding blocks, and the supporting frames are movably connected by a sliding sleeve structure. The pushing piston of the clamping arm is provided with a bar-shaped groove corresponding to the pushing rod of the pushing piston on the clamping arm.

A symmetrically-arranged closed gear transmission system comprises power sources, input shafts, input gears, an output gear and an output shaft. Each power source is connected with the corresponding input shaft; each input gear is on the corresponding input shaft; and the output gear is located on the output shaft and externally engaged with the input gears. The gear transmission system is in axis symmetry along the output shaft, and the two power sources are the same in power and rotating direction and output power synchronously. According to the symmetrically-arranged closed gear transmission system, by the adoption of the technical scheme, compared to the prior art, a fully-mirror-symmetrical closed structure is adopted, so that in construction, the system is kept stable in the center of gravity, is not prone to swinging, and is suitable for construction operation in a suspended mode and a vertical movement mode; and the safety and stability of the system are improved, and the using range is extended.

The invention relates to the technical field of machine pulsation controllers, and discloses a road surface flatness measuring device which comprises a detection host, a plurality of infrared sensors, a plurality of displacement sensors and a rectangular frame, wherein two vertical rods are fixedly connected to the edge of the upper end of the rectangular frame, and a transverse plate is fixedly connected to the upper ends of the two vertical rods together. The upper end of the transverse plate is fixedly connected with the lower end of the detection host, the lower end of the transverse plate is fixedly connected with a plurality of displacement sensors, a supporting rod is fixedly connected to the center of the rear edge of the upper end of the rectangular frame, and a fixing frame is fixedly connected to the upper side of the rear end of the supporting rod. According to the road surface flatness measuring device, flexible connection between the measuring device and a traction vehicle can be achieved, the situation that the working precision of the measuring device is affected by shaking of the vehicle is prevented, the measuring device can be rapidly lifted to facilitate hauling after measurement is completed, and obstacles at the upper end of a measured road surface can be cleaned when necessary.

The invention relates to a jig for bearing roller assembly, comprising a support, a bearing inner frame fixing seat is arranged in the middle of the support, the bearing inner frame fixing seat includes a plurality of elastically fixed friction bars, and bearing outer The frame pressing device; the bearing outer frame pressing device includes two sets of pushing mechanisms, the pushing mechanism includes a sliding block that is slidably connected with the support and a linear drive mechanism installed on the support for pushing the sliding block, on one of the sliding blocks A bearing outer frame supporting mechanism is provided, and a bearing outer frame pushing mechanism is arranged on the other sliding block; the bearing outer frame supporting mechanism includes two mirror-symmetrical clamping arms arranged on one of the sliding blocks, and the other sliding block The compression mechanism driven by air pressure on the upper body is also provided with a supporting frame on the two sliding blocks, and the supporting frames are movably connected by a sliding sleeve structure. The supporting frame is provided with two clamps for pressing The jacking screw of the tight arm is provided with a bar-shaped groove corresponding to the jacking screw on the clamping arm.

A motorcycle (10) is provided with an upper inner member (61) having a bent part (61a) protruded forward in a vehicle in a side view, a lower inner member (62) joined to the back of the upper inner member (61) and a front cover (51) joined to the upper and lower inner members (61,62) and covering the front of a vehicle body, a front wall (71), a bottom wall and a side wall (73) of an inner rack (70) are formed by overhanging the inside in a direction of vehicle width of a half under the bent part (61a) of the upper inner member (61) forward in the vehicle, an upper part formed to be a flat face in the side view of the lower inner member (62) is joined to the side wall (73) of the upper inner member (61) along the side wall, and the front wall (71), the bottom wall and the side wall (73) are covered with the front cover (51).

The invention discloses a floating connector, and belongs to the technical field of honing machining. The floating connector comprises a connection body assembly and an auxiliary connection body, wherein the connection body assembly comprises a main connection body and a lower sealing cover; the head part of the auxiliary connection body is accommodated in a floating cavity in the lower end of themain connection body; the lower sealing cover sleeves outside the auxiliary connection body, and is detachably connected with the lower end of the main connection body; a cross block is further arranged in the floating cavity, and slidably connected between the bottom of the floating cavity and the top of the auxiliary connection body; and the auxiliary connection body and the cross block form clearance fit with the inner wall of the floating cavity, and the lower sealing cover forms clearance fit with the outer wall of the auxiliary connection body. According to the floating connector, a structure that the cross block forms horizontal slide fit with the main connection body and the auxiliary connection body is used for replacing a traditional universal joint, so that a tool is enabled tomuch stably float in the horizontal direction, higher honing machining accuracy is achieved, and an orifice is not liable to be machined to be in the shape of a horn; and in addition, due to a centering design during the rotation of the tool, the tool is not liable to swing, accurate entrance into the orifice, of the tool, is achieved, and damage to the orifice is avoided.

The invention provides a hemostix. The hemostix comprises a catheter seat, a blood sampling structure and a connecting pipe, wherein an accommodating cavity is formed inside the catheter seat; a catheter for accommodating a puncture needle tube is fixedly arranged at one end of the accommodating cavity; the hardness of the catheter is less than that of the puncture needle tube; the puncture needletube has a first state in which the puncture end extends out of a catheter, and a second state in which the puncture end is retracted toward the catheter seat and is separated from the catheter seat;the blood sampling structure comprises a blood collection needle; the connecting pipe is connected with the catheter seat and the blood sampling structure, and is communicated with the accommodatingcavity and the blood collection needle; and the hardness of the connecting pipe is not less than that of the catheter seat. According to the hemostix, pains of a person waiting for blood sampling canbe relieved in the blood sampling process, blood sampling operation can be performed conveniently, and accuracy of a blood detection result can be improved.

The invention discloses a feeding device of a die cutting machine. The feeding device comprises support arms on the two sides and a connecting rod for connecting the support arms. A first round rod, a second round rod, a third round rod, a fourth round rod and an auxiliary rod are arranged between the two support arms. The auxiliary rod is provided with an externally-arranged pressing plate. The pressing plate is provided with a pressing trough. The feeding device of the die cutting machine is arranged on one side of a feeding table, and a die cutting device is arranged on the other side of the feeding table. The first round rod is provided with two slideable first fixing rings. The third round rod is provided with two slideable second fixing rings. The first fixing rings are fixed to the first round rod through bolts, and the second fixing rings are fixed to the third round rod through bolts. The lower side of the pressing plate is in a smooth arc shape, and the pressing plate is fixed to the auxiliary rod through bolts. The feeding device of the die cutting machine is simple, applicable and convenient to use. The tension of die-cutting raw materials is controlled stably, the die-cutting raw materials are not prone to swinging, and the die cutting precision is high.

The invention discloses a projection screen storage apparatus and a use method therefor. One end of a connecting shaft (6) is rotationally connected with a screen storage bucket (5), and the other end of the connecting shaft is fixedly connected with a sliding block (7); a locking bolt (8) penetrates through the sliding block (7) and props against the outer wall of a supporting rod (1); an engagement part (9) is arranged on the lower surface of a screen hook (3); an engagement matching part (10) is arranged at the end part of the screen storage bucket (5); and the position of a limiting ring (13) ensures that the end part of the screen storage bucket (5) just props against the lower surface of the screen hook (3) when the sliding block (7) props against the limiting ring (13). According to the apparatus and the method, during storage, the engagement part is engaged in the engagement matching part, so that the storage bucket can be fixed and difficultly swings, and the fixing effect is good; the screen hook has two effects of fixing the storage bucket during storage and suspending screen during use simultaneously; and the design is novel, a separate storage bucket fixing mechanism is removed, and the structure is simple.

The invention discloses a hidden fan. The hidden fan comprises a ceiling fan body. The ceiling fan body comprises a hanging shaft, a motor which is arranged at the lower end of the hanging shaft, a turntable which is arranged on the motor and a plurality of fan blades which are arranged on the turntable. The fan blades are arranged on the turntable through a rotating mechanism and can be thrown away through a centrifugal force; an annular counterweight portion is arrange don the turntable, and the counterweight portion can greatly improve the stability when the ceiling fan rotates, so that the fan is unlikely to waggle and swing; the hidden fan also comprises a wireless receiving module and a master control plate which is connected to the wireless receiving module and controls the start to start and stop, so that fan is wirelessly controlled by means of a remote control terminal or a mobile terminal.

The invention provides a projection curtain storage device. One end of a connecting shaft (6) is rotationally connected with a curtain storage barrel (5); the other end of the connecting shaft (6) is fixedly connected with a slide block (7); a locking screw bolt (8) passes through the slide block (7) to be jacked and pressed onto the outer wall of a support rod (1); the lower surface of a curtain hook (3) is provided with a clamping part (9); the end part of the curtain storage barrel (5) is provided with a clamping matching part (10); a position limiting ring (13) is arranged in a position so that when the slide block (7) is jacked to the position limiting ring (13), the end part of the curtain storage barrel (5) is just jacked to the lower surface of the curtain hook (3). During the storage, the clamping part is clamped into the clamping matching part, and the fixation on the storage barrel can be realized; the swinging cannot easily occur; the fixation effect is good; the curtain hook simultaneously has two effects of fixing the storage barrel during the storage and hanging the curtain in the use process; the design is ingenious; a single storage barrel fixing mechanism is omitted; the structure is simple.

The invention discloses a frame body of a vertical circulating three-dimensional garage and a three-dimensional garage adopting the same. The frame body includes a left frame piece and a right frame piece which are arranged in a left-right symmetric manner; and the left frame piece and the right frame piece are fixedly connected. A transmission mechanism mounting frame is arranged vertically at each of the right side surface of the left frame piece and the left side surface of the right frame piece; and closed-loop type anti-oscillating guide rails having the same sizes are connected to the radial peripheries of the transmission mechanism mounting frames at the frame pieces. The centroids of the two closed-loop type anti-oscillating guide rails are arranged at the left side and the right side of the connecting line between the centroid of the left frame piece and the centroid of the right frame piece; and the distances between the centroids of the two closed-loop anti-oscillating guiderails and the connecting line of the centroid of the left frame piece and the centroid of the right frame piece are equal. Therefore, power taking become safe; a carrying suspension bracket is not easy to oscillate; the operation become stable; and the safety and reliability are high.

The invention provides a purification and dust removal device. A plurality of dust suction pipes are vertically distributed in a box body of the purification and dust removal device; cathode lines penetrate through the dust suction pipes respectively and are fixed by an upper frame and a lower frame; the upper end parts of the cathode lines are fixed on the upper frame, and the lower end parts of the cathode lines are fixed on the lower frame; the upper frame and the lower frame are both fixed on the box body; the upper frame or the lower frame is connected with a high-voltage power supply system through a wire. The dust suction pipes are arranged to greatly enlarge the dust collection area; the cathode lines penetrate through the centers of the dust suction pipes, so that the internal part of each dust suction pipe forms a high electric field which is uniform in strength, large in onset area, and capable of rectifying the exhaust gas when the exhaust gas passes through each of the dust suction pipes; the cathode lines are fixed through elastic elements, so that the cathode lines can be tensioned tightly; the elastic elements are low in wind resistance and low in possibility of swing, so that the cathode lines are better in stability.

The invention discloses a unilateral adaptive rail robot bottom plate which comprises a positioning installation plate, two sets of mounting driving mechanisms, two sets of fast-demounting mounting mechanisms and a self-adaptive guiding pressing mechanism. The two sets of mounting driving mechanisms are symmetrically fixedly arranged on the same side of the positioning installation plate, are in rolling contact with one side face of the rail and the upper surface of the rail at the same time and are used for suspending the positioning installation plate and providing driving force. The two sets of fast-demounting mounting mechanisms are symmetrically fixedly arranged on the other side of the positioning installation plate and make rolling contact with or disengage from the upper surface ofthe rail through linear stretching and contracting motion. The self-adaptive guiding pressing mechanism is fixedly arranged on the other side of the installation plate by being opposite to the two mounting driving mechanisms and is in rolling contact with the two positions of the side face of the rail in a pressure applying manner with a certain space. By means of the unilateral adaptive rail robot bottom plate, the structure is portable and compact, and due to the adjustment of sizes and part parameters, the unilateral adaptive rail robot bottom plate can be suitable for motion conditions ofdifferent sizes of rails and are convenient to demount, mount, transport and maintain.

The invention provides sanitary and environmentally-friendly smoking apparatus used for producing smoked sausages, and adapts to large-scale industrial production of smoked sausages. When being in use, the sanitary and environmentally-friendly smoking apparatus used for producing smoked sausages is simple and convenient in sausage hanging process, stable in overall structure, convenient to assemble, and capable of performing smoking on a plurality of sausages. Moreover, the smoking apparatus is capable of ensuring uniform smoking effect on the sausages; sausage-hanging racks are not liable tobe blown down by high wind; and eating of the sausages by birds and polluting of the sausages by flies are also avoided. The smoking apparatus used for producing smoked sausages is capable of performing smoking on a large amount of sausages in one time, so that, production efficiency is improved; smoke flow rate during the sausage smoking process can be raised so as to ensure sausage smoking efficiency; and a smoke production box is arranged, so that, the smoke production box is separated from a smoking box so as to prevent sausages from pollution by ash when combustible materials are being combusted for producing smoke. By performing purification on smoke, possibility of contamination on sausages by smoke is reduced, so that, taste of the sausages can be beneficially guaranteed; moreover,relatively good purification and environment protection effects are achieved by avoiding direct discharge of untreated smoke into the air. Thus, environmental pollution is reduced.

The invention belongs to the technical field of vegetable planting equipment and particularly discloses vegetable planting equipment. The equipment comprises a baseplate, an air cylinder and two planting racks are arranged on the baseplate, and a first rack is arranged on a piston rod of the air cylinder; each planting rack comprises a vertical supporting rod, a supporting plate and a planting plate, a planting groove is formed in each planting plate and filled with a nutrient solution, and a horizontal shaft rotatably connected with each supporting plate is arranged in the middle of the supporting plate; a coaxial rotary disc is arranged at the side, close to the corresponding planting plate, of each horizontal shaft, a long supporting rod is arranged at one side of each rotary disc, anda short supporting rod is arranged at the other side of each rotary disc; multiple top rods are arranged on the portions, between the long supporting rods and the short supporting rods, of the rotarydiscs in the circumference direction, a first gear which is coaxial with each horizontal shaft and is fixedly connected with the horizontal shaft is arranged at the side, away from the corresponding rotary disc, of the horizontal shaft, and the first gears are meshed with the first rack. The vegetable planting equipment is mainly applied to vegetable planting, and the problem is solved that due tomultiple operation steps of adjusting the angles of the planting racks, planting equipment is inconvenient to use.

The invention discloses a structure and method for removing viscera for deep processing of fish. There is a horizontal plate on the top surface of the supporting frame, and a sliding plate is slid on the horizontal plate; The left end of the first removal strip is fixed; the front side of the first removal strip is provided with a second removal strip; the rear side of the left end of the first removal strip has a small motor, and the front end of the output shaft of the small motor passes through the through hole on the first removal strip. It is fixed to the rear side of one end of the connecting bar; the horizontal lifting plate is located on the right side of the first and second removal bars, and the bottom surface of the horizontal lifting plate is fixed to the upper end of the piston rod of the lifting cylinder; the top surface of the horizontal lifting plate has a front clamping plate and a rear clamping plate ; The front plate surface of the front clamping plate is fixed to the piston rod rear end of the front cylinder, and the rear plate surface of the rear clamping plate is fixed to the piston rod front end of the rear cylinder. The invention can replace manual work to reliably tear off the viscera in the fish maw, and can effectively reduce the labor intensity of the operator on the premise of ensuring the effect of removing the viscera.

The invention discloses a high-voltage transmission line inspection robot and belongs to the technical field of cable detection. The robot comprises two robot bodies with the same structure, a rack, two symmetrical linear modules with the same structure and a binocular camera, wherein the robot body comprises a turntable, a clamping device and a robot linear motion joint. According to the high-voltage transmission line inspection robot in the invention, three tracks with a fixed angle clamp cables to increase the friction force, so that the adaptability of the robot to the environment is improved. The high-voltage transmission line inspection robot in the invention adopts a link mechanism to save the driving parts, which is beneficial to control design and maintenance.

The invention discloses a vacuum adsorption lifting appliance and a use method thereof. The vacuum adsorption lifting appliance comprises a plurality of vacuum suckers which are symmetrically mounted on a supporting rack at intervals; the supporting rack is hooked onto a hook via a nylon tape; and the hook is connected onto a traveling case via a wire rope. As the vacuum suckers are symmetrically adsorbed onto a thin Al-plate at intervals, the adsorption of the thin Al-plate is more reliable, the moving process is stabler, the swinging possibility is low, and both surface scratching and large deformation of the thin Al-plate caused by touch can be avoided.

The invention discloses a geared five-bar combined mechanism used for a climbing car. The mechanism comprises a motor, five-bar mechanisms, planetary gear trains and an ordinary gear train. An output shaft of the motor drives an upper transmission shaft and a lower transmission shaft to rotate synchronously through gear engagement. A planetary gear of each planetary gear train is driven to rotate around a center wheel through the corresponding five-bar mechanism connected with the transmission shafts. The movement of a long bar of each five-bar mechanism is resultant movement of self-rotation of the corresponding planetary gear and a short bar fixed to the planetary gear and crank rotation, and the track of the resultant movement is an oval. Due to the fact that the movement track is an oval, compared with the prior art, the operation is more stable, the fluctuation is small, and the possibility of cargo damage can be effectively reduced. During movement, both the speed and the accelerated speed change according to a sine rule, no abrupt change occurs, and the impact on stairs is small. Supporting legs of the device are perpendicular to the ground all the time, so that borne cargoes are not prone to swinging in the transportation process, and the safety of cargo transferring and the comfort of transferring personnel are improved.

The invention relates to the field of dynamic balancing machines, and discloses a crankshaft dynamic balancing machine which comprises a swing frame, a supporting mechanism used for supporting a crankshaft and a driving mechanism used for driving the crankshaft to rotate are sequentially arranged above the swing frame. The driving mechanism comprises a spindle box arranged on the swing frame in a sliding mode, a driving spindle rotationally arranged in the spindle box, a balance assembly arranged on the driving spindle and a driving motor driving the driving spindle to rotate, the spindle box slides in the axis direction of the crankshaft to be calibrated, the driving spindle and the crankshaft to be calibrated are coaxially arranged, the end, close to the supporting mechanism, of the driving spindle extends out of the spindle box and is provided with a shifting pin used for matching the rear end of the crankshaft in an inserted mode, and the balance assembly is used for counteracting unbalanced torque of the crankshaft. A detection mechanism for monitoring the rotation state of the crankshaft is arranged at the bottom of the swing frame. The invention has the effect of improving the dynamic balance verification precision of the three-cylinder crankshaft.

The invention discloses a pallet-type escapement structure of mechanical clocks and watches. The pallet-type escapement structure comprises an escapement wheel and mutual-linkage escapement forks cooperating with the escapement wheel; the distance and included angle formed among a first impacting pallet, first locking pallet and main escapement fork shaft of the first escapement fork are equal tothose formed among a second impacting pallet, second locking pallet and auxiliary escapement fork shaft of the second escapement fork; the distances between the main escapement fork shaft and the auxiliary escapement fork shaft and a wheel shaft of the escapement fork are the same. The pallet-type escapement structure has the advantages that due to the fact that the included angle and distance among the impacting pallet, locking pallet and fork shaft of the first escapement fork are identical to those among the impacting pallet, locking pallet and fork shaft of the second escapement fork, theposition relationships between the fork shafts and the escapement wheel are the same, and no friction exists in the impacting process, a dual-impacting escapement system with no lubricating oil assistance, the same impacting force moment, the same unlocking energy consumption, the same impacting position and a symmetric operation period can be provided. The system can automatically start, the rebanking phenomenon cannot easily occur due to the too large swing amplitude, polarization still cannot be caused under the condition of the insufficient clockwork spring force moment, and the stabilityand the precision are effectively improved.