51results about How to "Low terrain requirements" patented technology

The invention discloses a construction method for a long-span handle-basket arch bridge steel arch rib fastening and hanging system in a high speed railway. The construction method is used for assisting in mounting long-span steel arch ribs and linear adjustment, the fastening and hanging system mainly comprises a fastening anchorage cable, a cable tower, an anchor cable and anchorage, a side wind-cable and anchorage and a fastening and hanging anchoring structure. Long-span steel arch ribs are hoisted through a segmental mode, each segment adopts a fastening cable to be hung and fastened, theupper end of the cable tower is aslant anchored to an anchor eye of a tension platform on the top of the cable tower, the cable tower and the corresponding anchor cable are simultaneously and symmetrically stretched and drawn, and the anchor cable is anchored to the anchor cable and anchorage in advance. The steel arch rib is hoisted through the segmental mode, each segment is fastened and hung with one set of fastening cable. The construction method for the long-span basket handle arch bridge steel arch rib fastening and hanging system in the high speed railway has the advantages that the steel arch rib segments are installed by adopting the cable-stayed fastening and hanging system, the technical problem of the long-span arch bridge construction under complex topography conditions suchas mountain areas, river valleys and the like is overcome, it is achieved that an arch bridge can be built without supports in mid-span, the dependence of bridge construction on topography and landform is reduced, the adjustment of installation linearis is convenient, the operability is strong, the overall structure layout is reasonable, safe and reliable, and the construction method for the long-span basket handle arch bridge steel arch rib fastening and hanging system in the high speed railway has popularization and application value.

The invention discloses a rapid measuring method for the growing height of agricultural crops in mountainous areas based on an unmanned aerial vehicle photographed image. The method comprises the following steps: acquiring the geographical coordinates of all ground control points and the surface elevation value H; acquiring an initial image P1 and a measurement image P2; establishing elevation dense point clouds; generating respectively a ground splicing image and digital surface model data; generating a three-dimensional model for an agricultural crop growing area and extracting from the three-dimensional model the bare soil elevation value and the measurement elevation value; and outputting the growing height of the agricultural crops. According to the invention, through an unmanned aerial vehicle, it is possible to obtain what is influential in the growing process of agricultural crops; and through the cooperation with the ground control points, DSM data are generated and a three-dimensional model is obtained; and from the three-dimensional model, the growing height of the agricultural crops in each period can be further obtained. With a spatial analysis method to extract the growing height of agricultural crops, the method does not require much on the terrains, therefore, making it suitable for the height measurement of different types of agricultural crops in different growing periods. Capable of measuring at a short time, the method also achieves high efficiency and good measurement precision.

The invention discloses an onboard panorama monitoring system of an unmanned aerial vehicle. An aerial remote sensing image is transmitted to the ground in real time, and then the real-time panorama remote sensing image monitoring system is generated. The system is composed of the unmanned aerial vehicle, a remote sensor subsystem, an information transmission and ground safeguard subsystem and a panorama stitching treatment subsystem, wherein the unmanned aerial vehicle carries a remote sensor to acquire remote sensing information, an information transmission device in the information transmission and ground safeguard subsystem is used for transmitting the state of the unmanned aerial vehicle, the state of a pan-tilt, the state of the remote sensor and control signals and downloading images, a ground safeguard device in the information transmission and ground safeguard subsystem is used for transporting and storing system devices and providing comprehensive ground safeguard for the system devices, and the panorama stitching treatment subsystem is used for achieving automatic panorama stitching of downloaded image information and real-time monitoring. The system ensures that the monitoring device can be used by nonprofessional users conveniently, is easy to operate, can be applied to various industries, and has the advantages that deployment is convenient, maneuverability is high, and the real-time property of information is high.

Provided is a self-adaptive hydraulic potential energy converting device. The device comprises a first hydraulic cylinder set, a second hydraulic cylinder set, a first potential energy source, a second potential energy source, multiple valves connected with the corresponding hydraulic cylinders, pistons in the hydraulic cylinders and piston rods connected with the pistons, wherein the first hydraulic cylinder set and the second hydraulic cylinder set are each composed of multiple hydraulic cylinders of different sectional areas. The first hydraulic cylinder set is connected to the first potential energy source through the corresponding valves, and the second hydraulic cylinder set is connected to the second potential energy source through the corresponding valves. The piston rods of the first hydraulic cylinder set and the pistons of the second hydraulic cylinder set are connected in series. The first potential energy source is used for pushing the first hydraulic cylinder set and the second hydraulic cylinder set by reducing potential energy, the second potential energy source increases the potential energy through movement of the first hydraulic cylinder set and the second hydraulic cylinder set, and the area ratio of the first hydraulic cylinder set to the second hydraulic cylinder set is adjusted through the multiple valves on the basis of the potential energy changes of the first potential energy source and the second potential energy source. Energy conversion and transmission of two or more sets of different potential energies can be achieved through the self-adaptive hydraulic potential energy converting device.

The invention relates to a modular mobile solar power generation device. The modular mobile solar power generation device takes a container box adapted for vehicle transportation as a frame. Both sidebox plates and a top upper support frame are of a split structure, and a photovoltaic plate is installed, and can be turned to an angle suitable for collecting sunlight. The bottom frame of the box is provided with multi-layered built-in photovoltaic modules, and the multi-layered built-in photovoltaic modules can be sequentially extended to the outside and turned to an angle suitable for solar illumination to absorb solar energy. The interior of the box is provided with a photovoltaic control part which is used for controlling the operation of each photovoltaic plate. Meanwhile, an energy storage battery pack is arranged in the box, and the device can store energy and electricity for external power supply. The device can increase the absorption of solar energy, increase the output of electric energy, realize the mobilization of the device, and meet the power demands in remote areas, various temporary camps, temporary office, production and living places in China, and also solve the practical problem of shortage of electricity and energy in energy-poor, power-underdeveloped countries or regions.

The invention belongs to the technical field of unmanned aerial vehicle defense, and particularly discloses an unmanned aerial vehicle comprehensive management and control system for the petroleum andpetrochemical field. The system is composed of a comprehensive situation display module, a multivariate information acquisition module, a threat assessment alarm module and a command and dispatch module. The comprehensive situation display module is a comprehensive information display platform based on a GIS geographic information system, and can comprehensively display managed and controlled geographic information resources, unmanned aerial vehicle situation information, flight trajectories, commanding and dispatching and police affair and police affair conditions. The multivariate information acquisition module is composed of a TDOA radio detection system and a grid radio passive detection device, the threat assessment alarm module is composed of an unmanned aerial vehicle target database and an intelligent analysis processing module, and the command and dispatch module is composed of a command control system and a satellite navigation decoy system. The comprehensive management andcontrol system does not cause any influence on the petroleum and petrochemical field, can display the comprehensive management and control condition of the regional unmanned aerial vehicle in real time, is convenient for commanding and dispatching, and solves the technical problem of unmanned aerial vehicle management and control in the petroleum and petrochemical field.

The invention discloses a circulating transportation mechanism. The circulating transportation mechanism is characterized by comprising two track modules parallel to each other, a first switching module and a second switching module, wherein the first switching module and the second switching module are symmetrically arranged at the two opposite ends of the track modules. The switching modules ofthe transportation mechanism have a switching function, and a transportation trolley can move back and forth between the two track modules through the switching modules, so that the circulating transportation function of the transportation trolley is achieved, and efficient operation of a production line is effectively guaranteed. In addition, the structural design shaped like a Chinese character'hui' is adopted by the transportation mechanism, the switching modules are arranged perpendicular to the track modules, and under the equivalent transportation capability, the occupied area of the transportation mechanism is smaller than that of a traditional circular-arc-shaped transportation track, so that the space resource waste problem of a production workshop can be effectively solved. Besides, the requirement of the transportation mechanism on the landform of the production workshop is low, and the circulating transportation mechanism is high in applicability and can be conveniently installed in various production workshops as needed.

The invention belongs to the technical field of mechanical energy storage, aims to solve the problem that high-efficiency and safe large-capacity energy storage cannot be realized in the prior art, and particularly relates to a composite energy storage system based on a deep well. The system comprises a control system, the deep well, a weight module, a gravity lifting device, a converter device and a compressed air energy storage device, wherein the gravity lifting device comprises a supporting assembly, a truss, a cross beam and a motor generator; the cross beam is movably connected with the truss; the motor generator is movably arranged on the cross beam; the compressed air energy storage device comprises a movable sealing device used for controlling opening and closing of the deep well preset cavity and a conversion device used for conducting conversion control over potential energy and electric energy of compressed air; the conversion device comprises an air compressor, an expansion machine, an air inlet pipeline, an air outlet pipeline, an air inlet valve and an air outlet valve, wherein the air compressor is communicated with the preset well cavity through the air inlet pipeline; and the expansion machine is communicated with the preset well cavity through the air outlet pipeline. The system is extremely small in occupied area, high in energy storage capacity, low in manufacturing cost and high in safety.

The invention provides an artificial sponge matrix for slope ecological restoration and a construction method. The invention particularly discloses the artificial sponge matrix for slope ecological restoration and the construction method. The matrix comprises the following components in parts by weight: 70-99 parts of sieved soil, 1-30 parts of sponge, 0.5-2 parts of a polymer spray-seeding auxiliary material, 0-10 parts of plant fibers, 0.5-2 parts of a compound fertilizer, 0-2 parts of a sustained and controlled release fertilizer, 0-5 parts of peat soil and 0.1-0.2 part of mixed seed. Afterthe composition is sprayed and sown, the air permeability, cohesiveness, water-retaining property and rain wash resistance of soil can be improved, germination and growth of plants can be promoted, and the performance is environmentally friendly.

The invention discloses a portable sediment sampler and a sampling method. The sampler comprises a fixed support, a sampling rod and a sampler, wherein the fixed support is connected with a fixing device, the sampling rod is connected with a sleeve, the sleeve is ball-jointed on the fixed support, a detachable cylinder is also mounted below the sleeve, one end of the cylinder is located on the fixed support, the sampling rod comprises a fixed rod and a telescopic rod, the sampler is mounted at one end of the telescopic rod, a sampling shovel is mounted at one end of the sampler and connected with the fixed rod through a string, the sampling shovel comprises an upper clamping piece and a lower clamping piece which are mounted on the sampler through hinged shafts, and tail ends of the upperclamping piece and the lower clamping piece are connected through a spring. The string is tensioned, the sampling shovel is opened, the sampler works, after the sampler finishes the work, the string is loosened, and the sampling shovel is closed. The portable sediment sampler can sample riverbed sediment at different depths, ensure that the sampling rod rotates freely and keep stable.

The invention discloses a small reusable landing buffer mechanism for star catalogue multi-point detection and an operation method thereof, and relates to the technical field of spacecraft structures and mechanisms; all terrain self-adaption systems are arranged on a body frame and vertically slide relative to the body frame, all horizontal energy absorption devices are arranged on one terrain self-adaption system, and each vertical buffering system is arranged on a horizontal energy absorption device and is of a bionic cat leg structure. The terrain self-adaption systems vertically slide along the body frame to adapt to an uneven star catalogue; the horizontal energy absorption devices adopt the friction braking energy absorption principle, the vertical buffering systems can rotate around a main rotating shaft, and impact energy in the horizontal direction during landing is absorbed to a certain extent; the vertical buffering systems adopt a bionic cat leg structure, absorbs impact energy in the vertical direction through joint deformation, and also can participate in absorption of a certain amount of impact energy in the horizontal direction.

An ecological hydro-junction facility applicable to river and lake communication comprises a submerged weir, water release gates, blow sand gates, gate piers, a ship lock, a guide wall and gate hoists. In a flood season, the water release gates and the blow sand gates are opened to enable part of river water to flow into a lake region and relieve the downstream flood prevention pressure, fishes migrate through the gates to lay eggs and find foods, and the gates are closed after the flood season ends. During the dry period, the blow sand gates are opened to feed water to the downstream to washsediment deposited in the lake region to the downstream and guarantee water abundance of the lake region. Exchange of a water body of the lake region and the river water is realized through the submerged weir throughout the year for fish swimming. The ecological hydro-junction facility is a gate and weir combined allocation open type regulation and control junction. While the defects of a hydro-junction are overcome, the problems of inadequate bearing capacity of water resources and water environments of river-communicating lake regions during the dry period and the like are effectively alleviated.

Disclosed is a suspended rail train suitable for running in mountains and scenic areas. The technical problems of high cost, large hidden safety hazards and poor flexibility of existing transportationequipment for mountains and scenic areas are solved. The train comprises a rail device, a monorail vehicle device and a rail supporting rack; the rail supporting rack is fixed on the ground, the monorail vehicle device is fixed on the rail supporting rack and comprises M monorail vehicles, M is greater than or equal to 2, and the M monorail vehicles are in series connection to form a train set through connecting guide rods and are suspended on the rail device for synchronous running; the monorail vehicles are provided with gears; the rail device comprises a rail and a rack; the rail is of aninverted T-shaped structure made of section steel, the rack is fixed in the middle of the lower end face of the edge of the rail, the rack is meshed with the gears on the monorail vehicles, and the rail is fixed on the rail supporting rack. The suspended rail train is suitable for serving as equipment for carrying people or goods on occasions, with changeable landform and narrow space, of the mountains and scenic areas, and is convenient to install and use, low in cost, safe and reliable.

The invention provides a base reinforcing and supporting device for constructional engineering, and relates to the technical field of constructional engineering. The base reinforcing and supporting device based on constructional engineering comprises a wall body and fixing bases, the fixing bases are arranged below the two sides of the wall body respectively, the ends, close to the wall body, of the two fixing bases are rotationally connected with side wall plates correspondingly, and the middles, the upper ends and the lower ends of the two side wall plates are provided with double round holes correspondingly; and two fastening rods penetrate through the positions, corresponding to the double round holes, of the wall body, fastening bases are arranged at the positions, corresponding to the double round holes, of the sides, away from the wall body, of the two side wall plates, and transverse ribs are fixedly connected to the middles of the multiple fastening bases. The fastening rods and the fastening bases are matched with the reinforcing plates and the reinforcing ribs, so that the whole two sides of the wall body can be stably reinforced, the reinforcing stability is improved, and the practicability of the base reinforcing and supporting device is enhanced.

The invention provides a slope ecological restoration spray-seeding anti-impact agent. The slope ecological restoration spray-seeding anti-impact agent is prepared from the following components in parts by weight: 40 to 90 parts of low-alkalinity sulfoaluminosilicate cement, 0.3 to 2 parts of organic gel, 0.4 to 4 parts of cellulose and 0.3 to 5 parts of a pH regulator, wherein the pH regulator is ammonium salt and organic acid, and the mass ratio of ammonium salt to the organic acid is (1:1)-(5:1), the organic gel is polyvinyl alcohol (PVA) and polyacrylic acid (PAA), and the mass ratio of the polyvinyl alcohol (PVA) to the polyacrylic acid (PAA) is (1:1)-(8:2). After 5%-20% of the composition is added into a spray-seeding matrix, the air permeability, cohesiveness, water-retaining property and rain wash resistance of soil can be improved, germination and growth of plants can be promoted, and the spray-seeding anti-impact agent is low in material price and environmentally friendly in performance.

The invention relates to a ground anchor deck type pedestrian bridge structure capable of being assembled and a construction method. The structure comprises ground anchor foundations, bearing cables,truss units, a bridge deck system and stabilizing cables; the bearing cables are flexible steel cables, and two sides are anchored on the ground anchor foundations; the truss units are of prefabricated steel structures, the lower ends of overall trusses formed by assembling the truss units are supported on the bearing cables, and the truss units and the bearing cables form string structures; the stabilizing cables are arranged on two transverse sides of the bridge floor to guarantee the torsional rigidity of the structure; the structure system adopts a non-bracket construction method and comprises the following steps: (1) constructing the ground anchor foundations; (2) mounting the bearing cables; (3) assembling the steel trusses; (4) constructing the bridge deck system; and (5) mounting the stabilizing cables. Compared with a traditional cableway bridge, the structural system is high in rigidity, the freedom degree of bridge deck linear design is high, and vibration response and pedestrian passing conditions can be improved; a lateral wind-resistant cable is not needed, and the requirement for the bridge position terrain is low; temporary brackets are not needed during construction, main components are prefabricated in factories, construction is convenient, and quality is easily guaranteed.

The invention discloses a large-sized water bag device for collecting rainwater. The device comprises a floating ball layer, a sunshade thin film layer and a waterproof thin film layer; the waterproofthin film layer is laid under water; the sunshade thin film layer covers the upper portion of the water; the floating ball layer is attached under the sunshade thin film layer and comprises a plurality of floating balls, and water leakage holes are formed in the portions, among the floating balls, of the sunshade thin film layer. The device has the advantages that the structure is simple, the construction cost is low, a lot of operation of digging and hardening on the ground is not needed, a large amount of cement steel is not needed, and large equipment does not need to enter a factory. Theshape of a reservoir (a water bag) can be designed by fully utilizing topographical features, the diversity is high, the requirements for terrains are low, the reservoir can be constructed beside mountains according to the terrain, and the shape is diverse. The water evaporation loss is low, and an important significance is provided for keeping the water level under high-temperature weather. The reservoir is closed and opaque, debris is prevented from falling into the reservoir, algae breeding is inhibited, the danger that people and animals fall into the reservoir is reduced, and the purposeof periodic removal of sediments is achieved. The service life of the product is prolonged through light reflection of aluminum foil.

The invention discloses a method suitable for lemon anti-season autumn flower and fruit cultivation. The method the following steps that soil preparation is carried out, specifically, a land parcel is ridged, a cylindrical root control container is mounted on a ridge surface, soil, organic fertilizer and chemical fertilizer are uniformly mixed, the mixture is filled into a root control device, nursery stocks are put, continuously backfilling and compacting are carried out, water and fertilizer are applied in a sapling stage, conventional management is carried out on tree forms, and tree crowns are quickly expanded; during a rainwater concentration period, a rain-proof cover covers the root control device, and the rain-proof cover is properly opened for rainwater irrigation according to the growth condition of a tree body; a waterproof mulching film covers a ridge surface with before flower bud differentiation in early autumn of July, away from the position of the root control device, the rain-proof cover is continuously covered to control water and promote flowers, and rewatering is carried out until leaves are curled; and the waterproof mulching film and the like are opened after autumn flower buds generate, by means of the cultivation mode of 'high ridge forming and root control device' and the use of 'waterproof cloth and rainproof cover', autumn flowers are promoted through drought stress in the flowering period of the autumn flowers, a large number of the autumn flowers bloom, and the problem that the autumn flowers of lemon branches and tips are difficult to flower is solved.

The invention relates to the technical field of civil engineering, in particular to a construction method for solving stop rotation of a shield cutter head by grouting reinforcement and an internal support method. The method is suitable for fault treatment of the locking of a cutter head of a earth pressure balance shield machine and the construction of the similar shield construction which needsto open a cabin and enter the interior of an earth cabin for fault detection treatment. The construction method for solving stop rotation of the shield cutter head by the grouting reinforcement and the internal support method is characterized by comprising the following steps of 1, chemical grout grouting reinforcement soil body construction and 2, construction scheme for inspection and treatmentof personnel entering cabin. According to the construction method for solving stop rotation of the shield cutter head by the grouting reinforcement and the internal support method, the grouting reinforcement and the internal support method is adopted to enter the inner side of the cutter head, a traditional construction shaft method is replaced, construction enclosing piles, a support system and earthwork excavation are avoided, the construction period is effectively saved, and the material and mechanical costs are reduced.

The invention discloses a domestic sewage VER treatment system, and relates to a system for treating domestic sewage. The invention aims to solve the problem of high difficulty in collection and treatment of domestic sewage in cities and towns and rural areas without pipe network distribution. The system is composed of a grey water collection device, a black water collection device, a negative pressure collection well, a negative pressure transmission pipeline, a pump and a sewage treatment device. The domestic sewage VER treatment system disclosed by the invention has the characteristics of totally-closed collection, green ecology and cyclic utilization, and solves the problems of poor collection effect and poor treatment effect of existing rural sewage. The sewage treatment device disclosed by the invention can be used for treating grey water and black water, the treated black water can be discharged or used for farm irrigation, and black water slag is used for preparing organic fertilizer through biological fermentation. The method is suitable for treating domestic sewage.

The invention discloses a GBAS system and an application method in a complex airport environment. The system includes GBAS ground equipment, GBAS monitoring equipment, interference monitoring equipment, and GBAS expansion equipment; the GBAS monitoring equipment is used to receive text data sent by GBAS ground equipment and air GNSS signal, to send alarm information to the GBAS ground equipment; the interference monitoring equipment is used to receive electromagnetic signals and GNSS signals in the working frequency band, and generate interference monitoring information; the GBAS ground equipment is used to receive the alarm information, Interference monitoring information and GNSS signals in the air, and broadcast the navigation data in the form of VHF signals to the entire network to guide the aircraft to land safely. GBAS extension equipment is used to receive VHF signals and extend VHF transmission signals, and send and receive information according to the off-peak time slot of GBAS ground equipment transmission signals; realize GBAS ground equipment working status and signal quality monitoring, and realize closed loop Control can significantly improve the integrity and continuity of the GBAS system.

The invention discloses a mobile cooling and dust suppression device for building construction. The mobile cooling and dust suppression device for building construction comprises a bearing frame, a water bucket, a cover plate, a four-head atomizing nozzle and outriggers; the water bucket is lapped to the upper part of the bearing frame; a butt-jointing limiting plate is fixedly connected to the upper end of the bearing frame; the butt-jointing limiting plate is butt-jointed to the interior of a butt-jointing groove formed in the external wall of the water bucket; a limiting buckle is fixedly connected to the plate surface of the butt-jointing limiting plate; a buckling plate is buckled on the external side of the limiting buckle; a cover plate is lapped to the upper part of the water bucket; a rubber plug is fixedly connected to the bottom surface of the cover plate; the rubber plug is inserted in a port of the water bucket; and a pressurizing water lifting pump is fixedly connected tothe upper end of the cover plate. According to the mobile cooling and dust suppression device for building construction, a pulley plate of the mobile cooling and dust suppression device realizes contact with the ground and suspended concealing by means of an adjusting rod so that the wear of a pulley is reduced; and the grounding area of the device during placing is increased, and the standing stability of the device is enhanced.

The invention discloses a deep sea rare soft substrate mine collector walking chassis which comprises a traveling component. The traveling component comprises a machine frame and caterpillar band traveling mechanisms arranged on two sides of the machine frame. A slide plate used for contacting a rare soft substrate to support a mine collector is arranged below the machine frame. The deep sea rare soft substrate mine collector walking chassis has the advantages of being small in traveling resistance, low in power requirement, stable, reliable and the like.

The embodiment of the invention discloses a vortex flow resonance oscillation lifting type jujube picking machine. The vortex flow resonance oscillation lifting type jujube picking machine comprises astring bag device, a collecting device, a resonance oscillation device and an airflow generating device. The string bag device comprises a jujube collecting bottom disc, supporting rods, a fold mesh,a crank rocker mechanism and a string bag driving motor. The collecting device comprises a conveying belt and a collecting box. The conveying belt connects the collecting box and the jujube collecting bottom disc. The resonance oscillation device comprises a bracket and a pair of resonance oscillation air cylinders. The bracket is connected with the jujube collecting bottom disc. The resonance oscillation air cylinders are connected with the bracket and oppositely arranged above a truck groove. The airflow generating device is arranged on the bracket, and comprises a blower and an angle adjusting mechanism connected with an air outlet of the blower. Compared with the prior art, the vortex flow resonance oscillation lifting type jujube picking machine has the beneficial effects that requirements for topography by the vortex flow resonance oscillation lifting type jujube picking machine is low, the problem that large machinery can not be used is solved, manual picking is replaced, jujube picking efficiency is improved, and labor intensity of workers is lowered.

The invention discloses a movable U-shaped groove drainage ditch applied to water and soil conservation, the movable U-shaped groove drainage ditch comprises a front notch, reinforcing steel bar handles, a U-shaped groove body and a rear notch, one end of the U-shaped groove body is provided with the front notch, the other end of the U-shaped groove body is provided with the rear notch, the surfaces of the edges of the two sides of the U-shaped groove body are fixedly provided with a plurality of reinforcing steel bar handles, and the reinforcing steel bar handles are fixedly connected with the U-shaped groove body. The size of the U-shaped groove body is gradually reduced from the front groove opening to the rear groove opening, lap joint is convenient, the rear groove opening of the rear U-shaped groove is directly clamped into the front groove opening of the front U-shaped groove, the front groove opening and the rear groove opening are overlapped, anti-seepage lap joint is not needed, the requirement for the lap joint technology is low, the groove can be straight and can be turned in an arc shape, and the lap joint effect is good. The requirement for topographic conditions of passing areas is low, the gradient can be large or small, and flexibility is high. And time and materials are saved, the manufacturing cost is low, good economical efficiency is achieved, the structure is scientific and reasonable, use is safe and convenient, and great help is provided for people.