68results about How to "Reduce the amount of movement" patented technology

The invention provides a cursor control method of a head-mounted device. The method includes the following steps that a head motion processing sensor maps detected head motion data to be a head motion two-dimensional coordinate displacement and sends the head motion two-dimensional coordinate displacement to a microprocessor; meanwhile, an eye tracker maps detected eye motion data to be an eye motion two-dimensional coordinate displacement and sends the eye motion two-dimensional coordinate displacement to the microprocessor; the microprocessor superimposes the head motion two-dimensional coordinate displacement and the eye motion two-dimensional coordinate displacement to be a two-dimensional coordinate of cursor moving; a click event is executed through a voice recognition module, and the click event and the two-dimensional coordinate of the cursor moving are output together. The fact that the head and the eyes subconsciously move in a coordinated mode by nature is used, so that a mouse is controlled through sampling recognition achieved by head moving, eye moving and tooth touching, intelligent equipment can be put on the body of a person and carried, hands are freed, meanwhile the most direct and precise consciousness expression mode is achieved, namely what is seen can be controlled, operation is natural and easy, the action quantity is small, consumption of physical and mental energy in operation is reduced, time operation is facilitated, and the disabled can conveniently control the cursor.

The invention discloses a medical dirt eraser which comprises a brush head rotatably installed on a brush handle. The brush handle is fixedly provided with a brush cover covering the brush head. The brush head is in transmission connection with the output shaft of a power device through a universal hose. The eraser further comprises a liquid sprayer driven by the power device. The liquid sprayer is connected with a cavity of the brush cover through a water pipe. A speed regulating unit is arranged between a main wheel and a rack. The rack drives the main wheel to rotate through the speed regulating unit. The speed regulating unit comprises a transmission wheel and a driving gear axially and fixedly arranged. The transmission wheel is in transmission match with the main wheel, and the driving gear is in transmission match with the rack. The medical dirt eraser in the structure is reasonable in structure, and can quickly clean or eliminate splodge or dirt to prevent medical personnel from being contacted with dirt manually, so that the medical infection risk is reduced. The eraser is time-saving and labor-saving and convenient to operate, so that the safety and sanitation of medical personnel are ensured.

The invention relates to a quick direct memory access (DMA) ping-pong caching method, which is used for moving data blocks of which part of data are the same from adjacent data blocks. The method comprises the following steps that: the DMA firstly moves the data blocks in a processable byte quantity by a CPU into a target cache and then sequentially moves the data blocks into the target cache until the target cache is completely covered and the turn of data moving is completed, wherein the byte quantity of the sequentially moved data block is equal to that of the part of the different data inthe adjacent data blocks from the data blocks which need to be moved. The method can reduce the redundancy in the process of processing the part of the same data in the adjacent data so as to reduce the quantity of the data moved by the DMA at each time, thereby decreasing the wait time of the CPU.

This invention discloses a protection device of a phase compensation impedance relay including: A,B and C are compensated in terms of phase separately to make up of a phase compensation impedance relay connecting to jump A, jump B, jump C by transmission lines and connecting to a three phase jump device by AND gate for detecting transmission line phase A,B, C performance and state, if one phase faults, then only one phase jump is realized, if two or three phases fault, then three phase jumps are realized.

The invention discloses a double-nut distance-adjusting device for an extrusion tablet machine. The double-nut distance-adjusting device comprises a screw rod (10), a shell body pressing cover (11) and a shell body (12); a closed cavity is formed by the shell pressing cover (11) and the shell body (12), the shell body (12) is internally equipped with a worm gear and worm mechanism, the shell body (12) is fixedly connected with a rack, and the screw rod (10) is fixedly connected with a roller bearing. The double-nut distance-adjusting device also comprises distance-adjusting nuts (7) and distance-adjusting pads (8), a worm gear nut (1) of the worm gear and worm mechanism is in threaded connection with the screw rod (10), the distance-adjusting nuts (7) and the distance-adjusting pads (8) are connected with the worm gear nut (1) through first screws (9), the distance-adjusting nuts (7) are in threaded connection with the screw rod (10), the screw rod (10) is fixedly connected with the rack, and the worm gear nut (1) drives the distance-adjusting nuts (7) to together rotate around the screw rod (10) so as to allow the screw rod (10) to move up and down. The double-nut distance-adjusting device has high distance-adjusting precision and low adjustment costs, and can adjust the distance under load.

The invention discloses a dry magnetic separator based on fluidization. The dry magnetic separator comprises an obliquely arranged magnetic separating drum; a fluidization separating tank arranged below the magnetic separating drum, wherein the fluidization separating tank is arranged with a same inclination angle with the magnetic separating drum; and a feeding apparatus arranged on the front end of the magnetic separating drum, wherein materials are delivered from the feeding apparatus to the front part of the fluidization separating tank. The fluidization separating tank comprises a base frame, a curved air distributing plate with a filter cloth interlayer arranged on the base frame, and an air chamber arranged on the lower part of the base frame. The feeding apparatus comprises a sphenoid buffering chamber; a feeding quantity controlling plate arranged at the port of the sphenoid buffering chamber, wherein the feeding quantity controlling plate is controlled by a quantity-controlling pin; and a feeding flashboard arranged on the bottom of the sphenoid buffering chamber, wherein the feeding flashboard is controlled by a switch pin. According to the invention, with the fluidization separating tank, the feeding material is fluidized. The feeding material is repeatedly separated in the magnetic separating drum while flowing. Feeding width is enlarged by using a fluidization rod. Feeding thickness is controlled by using the feeding quantity controlling plate, such that the feeding quantity in a unit time can be controlled. The dry magnetic separator provided by the invention is advantaged in compact structure, uniform feeding, adjustable feeding quantity, small space occupation, large processing quantity, high separation efficiency, and low cost.

The invention discloses a patient moving vehicle for the department of orthopaedics. The patient moving vehicle comprises a shears-fork type lifting support, wherein the lower end of the shears-fork type lifting support is connected with a bottom board, universal wheels are arranged on four corners of the lower end surface of the bottom board, respectively, the upper end of the shears-fork type lifting support is connected with a support plate, two ends of the upper surface of the support plate are provided with bed board chutes, a bed board is inserted into the cavities of the bed board chutes, the lower end of the bed board is provided with slide ways, the upper end surface of the support plate is provided with pulleys corresponding to the slide ways. According to the patient moving vehicle, the shears-fork type lifting device is adopted, so that the height of the moving vehicle can be adjusted, then a patient can be conveniently moved, and a great deal of labor force is saved during movement; the structure that the bed board is inserted into the bed board chutes through the slide ways and sliders is adopted, so that when the patient is moved, the bed board slides to the surface of the sickbed, therefore, the moving distance and the moving amplitude are reduced, and the possibility of generation of secondary injury due to movement of the patient is effectively lowered.

The invention discloses a memory management method and a memory management system, relating to the technical filed of information. The method is as follows: dividing a memory into a first memory area and a second memory area; using a local compression algorithm to manage the first memory area; and when the first memory area is in an unstable state, using the data stored in a second memory block to fill a hole causing the first memory area to be unstable, wherein the second memory block is positioned in the second memory area. The system comprises a division module, a management module and a filling module. A filling mode is used to greatly reduce the movement quantity of the memory to enable the memory to recover to a stable state, further improving the memory management performance of the local compression algorithm under the condition of ensuring higher use ratio of the memory, thereby ensuring that the local compression algorithm can better consider both the memory use ratio and the memory management performance.

The invention discloses a steel wire rope detection steady-state limiting device. The steel wire rope detection steady-state limiting device comprises clamping devices, a detection device, a fixed loading device and a mounting platform, wherein the clamping devices and the detection device are both fixedly connected to the surface of the mounting platform; the fixed loading device is fixedly connected behind the mounting platform; each group of the clamping devices is provided with an upper clamping wheel, a lower clamping wheel and a supporting arm; the detection device comprises at least onedetection sensor and a detection support arm; and the detection device comprises a weak magnetic detection sensor, a strong magnetic detection sensor, an all-magnetic detection sensor and other various electromagnetic detection sensors. By virtue of the steel wire rope detection steady-state limiting device, the accuracy of the steel wire rope detection data is guaranteed, and damage to equipmentcaused by strong vibration of the steel wire rope is avoided.

The invention belongs to the field of mine machines, and particularly relates to a mine machine damping base. For the problems that potential safety hazards exist in an existing mine machine damping base, the damping manner is single, and the damping effect is common, the following scheme is provided at present, the mine machine damping base comprises a base body, an installing plate, a fixing assembly, a first damping assembly, a second damping assembly, a third damping assembly and a damping moving assembly; an opening is formed in the base body; the installing plate is arranged in the basebody through the opening; the fixing assembly is arranged at the upper end of the installing plate; the first damping assembly and the second damping assembly are arranged at the lower end of the installing plate; the third damping assembly is arranged on the periphery of the opening; and the damping moving assembly is arranged at the bottom end of the base body. The mine machine damping base is provided with the fixing assembly, through rotation of a threaded rod, a clamping plate is pushed towards the equipment, the equipment is clamped from the side face, and equipment fixing is finished; and through cooperation of the first damping assembly, the second damping assembly and the third damping assembly, multiple manners are adopted, actions are conducted from multiple angles, and the purpose of damping is achieved.

The invention relates to a drilling machine rod replacing device, in particular to an automatic rod replacing device which comprises a drilling device (1), a rod storage device (2) and a driver (3), the drilling device (1) comprises a propelling beam (11) and a propelling unit (12), and the propelling unit (12) is connected to the propelling beam (11) and can move up and down along the propelling beam (11); the rod storage device (2) is correspondingly arranged on the side portion of the drilling device (1), the rod storage device (2) can be used for placing a plurality of drill rods (4) which are distributed side by side, and the driver (3) can drive the rod storage device (2) to move towards the propelling unit (12) or retreat from the propelling unit (12) so that the drill rods (4) can be sequentially conveyed to the drilling device (1) in place one by one in the working process. According to the automatic rod replacing device, automatic rod replacing of the drilling machine can be achieved, the labor intensity of workers is relieved, the rod replacing and installing speed is increased, and the automatic rod replacing device is simple in structure and low in fault rate.

A cylindrical stone profiling machine comprises a profiling control device, a base, a transverse sliding base, a transverse moving mechanism, a longitudinal sliding base, a longitudinal moving mechanism, a workpiece clamping mechanism, a rotating base, a rotating mechanism, a main motor and a saw blade. The transverse sliding base can be transversely arranged on the base in a horizontal moving mode. The transverse moving mechanism is arranged between the transverse sliding base and the base, the longitudinal sliding base can be longitudinally arranged on the transverse sliding base in a horizontal moving mode, the longitudinal moving mechanism is arranged between the longitudinal sliding base and the transverse sliding base, the workpiece clamping mechanism is arranged on the base and used for clamping and rotating a workpiece, the rotating base is arranged on the longitudinal sliding base in a rotatable mode, the rotating axis extends horizontally in the longitudinal direction, the rotating mechanism is arranged between the longitudinal and used for driving the rotating base to rotate, the main motor is arranged on the rotating base, and the saw blade is arranged on an output shaft of the main motor. The rotating axis of the rotating base, the rotating axis of the workpiece and the center of the saw blade are located on the same horizontal plane, and the center of the saw blade is arranged on the rotating axis of the rotating base. The cylindrical stone profiling machine has the advantages of being simple in structure, accurate in action, convenient to operate and the like.

The invention discloses a universal shockproof device for a circuit board, and the device comprises a fixing mechanism and two fastening mechanisms. The fixing mechanism comprises a fixing plate, and the fixing plate is provided with a chute in the length direction of the fixing plate. The interior of each chute is uniformly provided with a plurality of connection holes, and each fastening mechanism comprises a sliding plate, a fastening part, and a pressure plate, wherein the sliding plate is slidingly connected in the chute, and is provided with an installation hole matched with the corresponding connection hole. The installation holes are movably connected with fastening bolts, and the fastening parts are fixedly installed on the sliding plates. The fastening parts are in threaded connection with screw caps for limiting the pressure plates. The screw caps are located above the pressure plates, and the surfaces, contacting with the circuit board, of the fastening mechanisms are provided with elastic layers. According to the scheme of the invention, the displacement, caused by a machine, of the circuit board is reduced through employing the elasticity of the elastic layers, thereby solving a problem that the elements on the circuit board are loosened. The device adjusts the interval between the two fastening mechanism through the sliding connection between the fastening mechanism and the fixing mechanisms, thereby enlarging the application range of the device.

The invention discloses a data classified storage method, device and equipment and a storage medium, and the method comprises the steps: determining the user data needing to be written at present as target data if the user data needs to be written into a flash memory, and determining a classifier needing to be used at present as a target classifier, wherein the classifier is obtained by training data characteristics and categories of the user data written into the flash memory; extracting data features of the target data, and inputting the data features of the target data into a target classifier to obtain a category to which the target data output by the target classifier belongs; and determining a storage area corresponding to the category of the target data in the flash memory, and writing the target data into the determined storage area. When garbage collection is carried out on the user data, the possibility of selecting blocks which are invalid data or most of the blocks are invalid data is relatively high, so that the moving amount of the user data is reduced, the write amplification coefficient is reduced, and the garbage collection efficiency is improved.

The invention discloses a data writing device for a key value storage system. The key value storage system is established in an imbricated type magnetic recording SMR hard disk. The data writing device comprises an instruction receiving unit, a judging unit and a writing unit; the instruction receiving unit is used for receiving a writing instruction which is used for indicating that a key value data object is written in the SMR hard disk, the SMR hard disk comprises multiple hard disk partitions and a protection zone, and firmware is stored in the protection zone; the judging unit is used for judging whether the to-be-written position of the key value data object is located in the protection zone or not, if the to-be-written position is located in the protection zone, an operation for writing key value data in the SMR hard disk is canceled, and if the to-be-written position is located in the hard disk partitions, a first target partition corresponding to the key value data object in the SMR hard disk is judged; the writing unit is used for segmenting the key value data object into at least one subdata object and sequentially writing the subdata objects in adjacent magnetic tracks in the first target partition. Accordingly, a write-protected mechanism is provided, and therefore the firmware is prevented from being improperly rewritten; meanwhile, the hard disk fragmentation degree is decreased, and the system garbage recycling efficiency is improved.

The invention discloses a machine tool base. The machine tool base comprises a base main body and a convex part arranged on the top surface of the base main body, wherein X axis guide rail bases are arranged on the top surface of the convex part; a first drainage ramp is arranged between the side wall of the base main body and the outer side of the X axis guide rail bases; a second drainage ramp is arranged between the X axis guide rail bases; a circulation hole is formed between the first drainage ramp and the second drainage ramp; an oil-water separator which can enable waste oil, water and cutting fluid in the first drainage ramp and the second drainage ramp to conveniently flow in is arranged at one end part of the base main body; an oil-returning slot used for collecting the waste oil is formed in one end part of the oil-water separator; an air hole is formed in the bottom surface of the base main body; and cross section of the base main body is of a symmetric oblique-pulling structure. Therefore, the machine tool base has good structural stability and shock resistance, and the function of discharging the waste oil, water and cutting fluid is strong, so that service life of the machine tool base is long, the air exhausting function of the machine tool base is also good, and the machine tool base can be widely applied to machine tools.

The invention discloses a heating system for separating harmful substances in oil. The heating system comprises a primary heating system, a gas-liquid separation tank, a secondary heating system and a smoke dispersion system, wherein the primary heating system and the secondary heating system comprises heating kettle bodies, drums, reducing mechanisms and driving devices; an oil circulation space is formed between the heating kettle bodies and the drums; the heating kettle bodies are connected with a housing; a ventilating chamber is formed between the housing and the heating kettle bodies; an air inlet and an air outlet are formed in the side wall of the housing; the air inlet of the primary heating system is communicated with the air outlet of the secondary heating system; the air inlet of the secondary heating system is connected with a burner; the gas-liquid separation tank comprises a tank body; the tank body is communicated with the primary heating system and the secondary heating system; the smoke dispersion system comprises a smoke dispersion tank; the smoke dispersion tank is connected with an oil smoke output pipe and a high-temperature oil outlet pipe; the smoke dispersion tank is communicated with the secondary heating system. When the heating system is adopted for oil refining, the phenomenon of local heating and fire in a heating air duct can be avoided, and the heat energy utilization rate can be improved.

The invention provides a through-shaft axial swash plate plunger pump. The through-shaft axial swash plate plunger pump comprises a shell body, wherein an end cover is arranged at the left end of the shell body, a tail cover is arranged at the right end of the shell body, a cylinder body is arranged inside the shell body, and a rotating shaft is arranged on the left end surface of the cylinder body; a swash plate is arranged at the position, located on the left side of the cylinder body, of the shell body, and the swash plate is arranged on the rotating shaft in a sleeving mode; a supporting shaft is arranged on the right end surface of the cylinder body; a front bearing is arranged in the swash plate, and the front bearing is arranged on the rotating shaft in a sleeving mode; and a rear bearing is arranged in the tail cover, and the rear bearing is arranged on the supporting shaft in a sleeving mode. The structure of the plunger pump can improve the stress condition effectively, and the displacement of the cylinder body during rotation is small, so that the plunger pump has the advantages of being stable in operation, low in vibration, low in noise and long in service life.

A vehicle seat allows, using a simple structure independent of a headrest, the entire body of the occupant sitting on the vehicle seat to sink (move) a large amount toward the rear of the vehicle when a rear collision occurs, and thus the vehicle seat can effectively reduce an impact to the occupant in the rear collision. A vehicle seat (S) is provided with: a seatback frame (1); a headrest (S3); a pressure receiving member (20) which is movable independently of the headrest (S3); and a rotation member (30) which is provided to either one and / or the other of side sections on both sides of the seatback frame (1), is connected to the pressure receiving member (20), and moves independently of the headrest (S3) due to a predetermined impact load. The rotation member (30) is connected to a pressing means (35) which press the pressure receiving member (20) to the front side of the seatback frame (1) through connection members (21, 22). The force required to return the rotation member (30) to an initial state is set in a range in which the force is greatest when the occupant is seated normally and the force is small when the rotation member (30) moves due to a rear collision.

The invention discloses a dry magnetic separator based on fluidization. The dry magnetic separator comprises an obliquely arranged magnetic separating drum; a fluidization separating tank arranged below the magnetic separating drum, wherein the fluidization separating tank is arranged with a same inclination angle with the magnetic separating drum; and a feeding apparatus arranged on the front end of the magnetic separating drum, wherein materials are delivered from the feeding apparatus to the front part of the fluidization separating tank. The fluidization separating tank comprises a base frame, a curved air distributing plate with a filter cloth interlayer arranged on the base frame, and an air chamber arranged on the lower part of the base frame. The feeding apparatus comprises a sphenoid buffering chamber; a feeding quantity controlling plate arranged at the port of the sphenoid buffering chamber, wherein the feeding quantity controlling plate is controlled by a quantity-controlling pin; and a feeding flashboard arranged on the bottom of the sphenoid buffering chamber, wherein the feeding flashboard is controlled by a switch pin. According to the invention, with the fluidization separating tank, the feeding material is fluidized. The feeding material is repeatedly separated in the magnetic separating drum while flowing. Feeding width is enlarged by using a fluidization rod. Feeding thickness is controlled by using the feeding quantity controlling plate, such that the feeding quantity in a unit time can be controlled. The dry magnetic separator provided by the invention is advantaged in compact structure, uniform feeding, adjustable feeding quantity, small space occupation, large processing quantity, high separation efficiency, and low cost.

The invention discloses a fastening device for a circuit board. The fastening device comprises a fixing mechanism and two fastening mechanisms. The fixing mechanism comprises a fixing plate. The two ends of the fixing plate are provided with connecting holes respectively. The connecting holes are movably connected with connecting pieces. The two fastening mechanisms are oppositely arranged on the fixing plate. Each fastening mechanism comprises a fastening piece fixedly arranged on the fixing plate and a pressing plate movably connected to the fastening piece. The fastening pieces are in threaded connection with nuts for limiting the corresponding pressing plates. The nuts are located above the corresponding pressing plates. The contact faces of the fastening mechanisms and the circuit board and the contact face of the fixing plate and the circuit board are provided with elastic layers respectively. By means of the technical scheme, on the one hand, wear to the circuit board is lowered by the fastening device in the vibration environment, and on the other hand, displacement, brought by a machine, of the circuit board is lowered through elasticity of the elastic layers, so that the looseness problem of an element on the circuit board is avoided.

The invention discloses a Winograd algorithm-based convolutional neural network hardware accelerator and a calculation method. The accelerator comprises an input buffer module, a PE array, a post-processing module, a data distributor, a control module, a configuration module, an output buffer module and a storage layer; the configuration module decodes the instruction into configuration information; the control module is used for controlling the PE array, the data distributor and other modules to complete different calculations; the data distributor reads the data from the storage layer by adopting different address mapping modes and data distribution modes, and distributes the data to the input buffer; the input buffer module sends the buffered calculation data to the PE array for calculation; the PE array performs calculation path reconstruction according to the configuration information and calculates the data; and the post-processing module performs operations such as multi-channel accumulation and activation function processing on a calculation result. According to the method, the convolution calculation speed can be increased, the data migration loss is reduced, and the performance of the whole accelerator is improved.

The invention relates to a connected building. The connected building comprises main frame structures, orridor structures, longitudinal limiting components and transverse limiting components; two or more main frame structures are arranged side by side, the corridor structures are arranged between every two adjacent main frame structures, and the ends of the corridor structures are in lap joint with the main frame structures through buffer limiting structures; the longitudinal limiting components are arranged on the side edges of the buffering limiting structures and used for limiting longitudinal translation of the corridor structures in the length direction; the transverse limiting components are arranged on the side edges of the buffering limiting structures and used for limiting transverse translation of the corridor structures in the width direction; and the limiting directions of the two longitudinal limiting components located at the two ends of the corridor structures are opposite, and the limiting directions of the two transverse limiting components located at the two ends of the corridor structures are opposite. According to the connected building, the corridor structuresdo not affect the main frame structures, can be firmly connected with the main frame structures and are not prone to falling off from the main frame structures.

The invention provides a method and system for primary frequency regulation of wind power, comprising: determining the theoretically producible active power of the wind turbine, and sorting the wind turbines according to the value of the theoretically generating active power; Set the standby capacity and load shedding rate of the fans; when the sum of the cumulatively set standby capacity of the fans reaches 0.06 times the sum of the rated power of all fans, set the load shedding rate of the remaining fans in the sequence to 0, with Reduce the load shedding rate of the wind turbine; when the frequency of the wind turbine drops and changes beyond the dead zone, and the primary frequency modulation command of the wind power indicates that the wind turbine needs to generate additional active power, the standby capacity will be input in sequence according to the sequence described above, until the input backup capacity meets the additional output indicated by the primary frequency modulation. Active power demand. The invention fully exploits the over-generating capacity of the fan, realizes the reduction of the reserved active power output of the fan during the non-primary frequency modulation period, improves the economic benefit, and reduces the loss of the mechanical part of the fan.

The invention discloses a shockproof device for an electronic element bearing plate, and the device comprises a fixing mechanism and two fastening mechanisms. The fixing mechanism comprises a fixing plate, and the fixing plate is provided with a chute. Moreover, two ends of the fixing plate are respectively provided with a connection hole, and the connection holes are movably connected with fastening bolts. The fixed plate consists of a plurality of hollow connection parts, and outer side walls of the connection part are provided with slideways. Two ends of each slideway are provided with baffle plates, and an inner side wall of each connection part is provided with a rolling ball. The rolling ball of one connection part is slidingly connected in the chute of the adjacent connection part. Each fastening mechanism comprises a fastening part which is fixedly installed on the fixing plate, and a pressure plate which is movably connected to the fastening part. The fastening parts are in threaded connection with screw caps which are used for limiting the pressure plates. The screw caps are located above the pressure plates, and the surfaces, contacting with the bearing plate, of the fastening mechanisms and the fixing plates are respectively provided with elastic layers. According to the technical scheme of the invention, the device solves a problem that a conventional bearing plate is liable to be damaged by the vibration caused by a machine body.

The invention relates to the technical field of supporting equipment, in particular to novel aluminum profile supporting equipment for a power battery module. The novel aluminum profile supporting equipment is convenient to assemble, a cover plate and a protective shell can be assembled by only one step, the assembly steps are reduced, the labor intensity of workers is reduced, the production speed is increased, rapid production is facilitated, the economic benefit is improved, the novel aluminum profile supporting equipment is convenient to open and can be opened by only one step after being discarded, internal batteries are recycled, the pollution of the batteries to the environment is reduced, the batteries are conveniently recycled, and the enterprise revenue is increased. Vibration generated when an electric vehicle runs is reduced through double damping, the situation that batteries of the battery module are dispersed due to vibration is avoided, the situation that the battery module falls off and collides with the cover plate in the morning due to too large vibration is avoided, the integrity of the battery module is protected, and the battery module is prevented from being broken due to collision and polluting the environment.