44results about How to "Meet operational needs" patented technology

This utility model discloses a self-locking hydraulic pipe joint, including a male joint and a female joint. The male joint has a pin, and a sealing sleeve and a spring are slidably fitted onto the surface of the pin. Under the action of the spring, the sealing sleeve can cover the connecting hole on the pin. A locking ring groove is provided on the outer wall of the pin. The female joint has an axially sliding valve core inside, which is connected to the spring and used to close the inner flow channel. The female joint also has multiple radially arranged locking pins, which cooperate with the locking ring groove of the pin to achieve mechanical locking. During the insertion process, the pin pushes the valve core back and compresses the spring, while the sealing sleeve backs to connect the connecting hole with the inner flow channel for flow. The locking pins automatically spring into the locking ring groove to achieve self-locking connection. The locking pins are made of ferromagnetic material and can be quickly unlocked by magnetic attraction from an external magnetic ring. This utility model has a compact structure, automatic sealing, self-locking, and quick unlocking functions, is easy to operate, and is suitable for hydraulic systems with high sealing and high reliability requirements.

A multifunctional cooling and heating integrated defrosting system suitable for middle and high-end passenger cars comprises a defroster shell, and a heating core body, a refrigerating core body and a centrifugal fan are arranged in the defroster shell. Wherein the heating core body is connected with a heating core body water inlet connector and a heating core body water outlet connector, the refrigeration core body is connected with a refrigeration core body refrigerant connector, an air outlet module is arranged at an air outlet in the upper portion of the heating core body, and an air inlet module is arranged at an air inlet in the lower portion of the refrigeration core body. The automobile air conditioner not only has the basic winter heating function or the defrosting / demisting function of the front windshield, but also meets the independent cooling function of a driver area; and the requirements of defrosting, demisting, air purification, air quality monitoring, air outlet mode adjustability, top-speed cooling or heating, full-automatic temperature control, partitioned temperature control of a driver area and a passenger area and the like are met.

This invention provides a flattening device for the ends of heating plastic pipes, applicable to the field of plastic pipe flattening processing equipment. The device includes: a support mechanism, divided into a main frame and a secondary frame; a pipe clamping mechanism for clamping and fixing the bent portion of the plastic pipe; a tail-end positioning mechanism for providing auxiliary support and positioning for the end of the plastic pipe furthest from the flattening end; an inner mold for extending into the flattening end and applying a compressive force to its inner wall; an outer mold, corresponding to the inner mold, for applying a compressive force to the outer wall of the flattening end; and a flattening drive mechanism, connected to both the inner and outer molds, for driving the inner and outer molds to achieve either mating compression or separation and resetting. This invention, through the corresponding mating of the outer and inner molds, applies a compressive force to the outer wall of the flattening end, ensuring that the flattening process meets design requirements, achieving high flattening accuracy, and facilitating convenient and efficient demolding from the narrow-mouth flattening end.

The utility model belongs to the technical field of cold and hot water units, and discloses a four-way valve cold and hot machine which comprises an outer box body, an upper cover is fixedly installed at the upper end of the outer box body through bolts, a main machine and an evaporator are fixedly installed in the outer box body, and a liquid inlet pipe and a liquid outlet pipe are installed on the side surface of the main machine. A mounting plate is fixedly arranged on the surface of the outer side of the main machine, a non-return mechanism is arranged on the upper surface of the mounting plate, and by preventing hot air from flowing back and communicating, heat loss is reduced, so that energy efficiency is improved, and efficiency is improved. According to the four-way valve cooling and heating machine, a linkage structure of the switching disc, the flow guide groove and the one-way valves is integrated in the non-return mechanism, accurate non-return and energy efficiency improvement are achieved through switching of the one-way valves with different damping characteristics, and dual protection of mechanical damping non-return and electric control path cut-off is formed in cooperation with on-off control over a liquid outlet path through an electromagnetic valve; and hot air is thoroughly prevented from flowing back and communicating through a gap between the four-way valve and the non-return box.

The present application relates to the field of coking, synthetic ammonia and the like containing ammonia wastewater treatment, and discloses a novel ammonia evaporation energy-saving process system, a primary ammonia evaporation tower, an intermediate pressurizing pump set, a water flow regulating device, a secondary ammonia evaporation device, a flash tank, a steam ejector, a pressurizing pump set and a control unit. After the ammonia-containing wastewater is preliminarily treated by the primary ammonia evaporation tower, it is delivered to the secondary ammonia evaporation device by the pressurizing pump, and introduced into new steam for secondary ammonia evaporation. After the secondary ammonia evaporation, the wastewater flows into the flash tank to produce flash steam by cooling and pressure reduction, and the flash steam is pressurized by mixing with the new steam through the steam ejector, and then returns to the primary ammonia evaporation tower or the secondary ammonia evaporation device, so that the steam is recycled multiple times. The system can effectively reduce the new steam consumption by 35-45% under the premise of ensuring the stability of the ammonia nitrogen index of the effluent, improve the energy utilization rate, reduce carbon emissions, and is suitable for direct ammonia evaporation and indirect ammonia evaporation systems.

The utility model discloses a parallel tail end multi-degree-of-freedom mechanical arm which comprises two groups of branch chains which are symmetrically arranged and fixed at two ends of a platform, each group of branch chains comprises a base, a first motor and a second motor are respectively arranged on two sides of the base, the first motor is connected with a first short connecting rod through a rocker arm, and the second motor is connected with a middle supporting piece. One end of the supporting piece is hung below the base through a support, the other end of the supporting piece is movably connected with the middle of the first long connecting rod, one end of the first long connecting rod is connected with the first short connecting rod, and the other end of the first long connecting rod is movably connected with the tail end platform. The other end of the second long connecting rod is movably connected with the tail end platform. According to the mechanical arm, the multi-degree-of-freedom parallel mechanical arm of the end effector can be achieved, and the problems that an existing parallel mechanical arm is complex in structure and high in control coupling degree, the degree of freedom of the end effector is limited, and installation and maintenance are difficult are solved.

The utility model discloses a telescopic rotary island table for solving the single adjustment function of movable panel in the existing island table, leading to low space utilization, and the technical problem of insufficient use convenience. The telescopic rotary island table specifically includes island table body, telescopic rotary component, fixed panel and movable panel, the fixed panel is connected in the top of island table body, and the gap is left between fixed panel and island table body to form movable cavity, the movable panel includes the movable end portion close to island table body, and the movable end portion is movably arranged in movable cavity through telescopic rotary component to make movable panel driven can make linear motion and rotary motion around island table body relative to island table body.

The utility model relates to a forced air cooling type energy storage battery PACK, which comprises a shell, two battery modules are arranged in the shell, each battery module comprises a plurality of battery cells arranged along a first direction, a ventilation duct is formed between two adjacent battery cells, a sealing partition plate is arranged on one side surface of each battery module along a second direction, and the two ends of each battery module are respectively connected with the shell in a sealing manner. A heat dissipation cavity which is used for accommodating the battery module and is communicated with the ventilation air duct is formed in the shell; a plurality of groups of air holes are formed in the sealing partition plate at intervals in the first direction, and each group of air holes comprises one or more through holes formed at intervals in the height direction; the air holes are correspondingly communicated with the ventilation air duct; an adjusting valve for adjusting the ventilation area is arranged in the through hole; a main air duct is formed between the two battery modules through the two sealing partition plates, and heat dissipation fans are arranged at outlets in the two ends of the main air duct respectively; and the shell is provided with a hollow area for ventilation. According to the utility model, the heat dissipation effect is improved, and the problem of poor temperature consistency of the battery module is solved.

This invention relates to the field of household appliance technology, and discloses a control method and a garment processing device. The garment processing device has a display screen with an adjustable display position. The control method includes the following steps: detecting whether a user is moving within a preset area; when user movement is detected within the preset area, determining whether the user's movement target is the current garment processing device; if so, acquiring user information and controlling the display screen to adjust to a preset display position corresponding to the user information; if not, the display screen maintains its initial position. That is, when a user is present in the preset area, the display screen is only controlled to adjust its display position when the user's movement target is determined to be the current garment processing device. This prevents frequent adjustments to the display screen due to misjudgment, reducing the failure rate. Adjusting the display position according to user information allows the display screen to be positioned optimally for the user to view and operate, improving user convenience.

The application relates to a power supply multiple working mode automatic switching controller and a car, a power supply module one is configured to receive a power input signal and output a power supply signal one; an MCU microcontroller is configured to enter a standby state in response to the power supply signal one, listen to a wake-up signal, and send a SOC state switching signal based on a listening result; a power supply module two is configured to receive a power input signal and output a power supply signal two, and switch between a PFM mode and a PWM mode according to a level high-low result of the listening result obtained through a MODE pin; and a SOC circuit is configured to enter a standby state in response to the power supply signal two and switch between a sleep state and a normal working state according to the SOC state switching signal. The application can solve the problem that a power supply chip can only run in a single mode and cannot be switched in the related art.

This utility model discloses an armrest box structure and engineering machinery, including an upper support assembly and a lower support assembly. The upper support assembly includes a handrest pad assembly, a first slide rail, and a support arranged sequentially from top to bottom. The first slide rail is arranged horizontally and connects the handrest pad assembly and the support. The handrest pad assembly can slide and lock relative to the support in the front-back direction. The lower support assembly includes a fixed seat distributed along the left and right sides, a second slide rail, and a support. The second slide rail is arranged vertically and connects the fixed seat and the support. The support can slide and lock relative to the fixed seat in the vertical direction. A support plate is fixedly installed on the upper part of the support. The rear end of the support is hinged to the support plate through a first pin, and the first pin extends axially along the left and right sides. This utility model can realize front-back, up-down, and flip-up adjustable functions, is simple to operate, and has a large adjustment range.

The invention discloses a mouse dynamic adjustment method, device, system and equipment and a medium, and the method comprises the steps: obtaining a game picture through intelligent glasses, and obtaining a target key element in the game picture; obtaining a mouse operation process corresponding to the target key element, and determining a mouse parameter adjustment strategy based on the mouse operation process; and performing mouse parameter adjustment according to the mouse parameter adjustment strategy so as to enable the mouse parameters to adapt to the mouse operation process. Through data interaction between the intelligent glasses and the electronic equipment, a cooperative working mechanism of the intelligent glasses and the mouse peripheral is constructed, the advantage of the multi-mode perception capability of the intelligent glasses is fully played, the mouse parameter adjustment is assisted through the intelligent glasses, the manual adjustment frequency of a player is reduced, and the user experience is improved. In this way, on one hand, the adaptation degree of the mouse parameters and the game scene can be improved, and on the other hand, the game immersion of the game player is improved, and the game player is helped to improve the competitive performance in the game.

The utility model discloses a kind of passenger car pneumatic motor systems, including air compressor, air tank and gas module, air compressor is connected with air tank and gas module respectively by distribution valve group and supplies gas for it, distribution valve is connected with several pneumatic motor, and pneumatic motor is used to drive the execution module of vehicle work, the utility model replaces the power source for driving execution mechanism operation by common electric motor into pneumatic motor, and using the air supply unit of vehicle carries out air supply to pneumatic motor, on one hand, compared with electric motor, pneumatic motor can use simple flow control valve to realize system control, without equipping complex electronic control system, simple structure, subsequent maintenance cost is less, purchase cost also compared with electric motor has reduced, can effectively reduce the cost of operation execution unit, and more conducive to the demand of vehicle light weight;On the other hand, multiple execution mechanism can share a set of air supply unit, improve the utilization of air supply unit, strong applicability.

This utility model relates to the field of tool cabinets, specifically a mobile steel tool cabinet. The utility model includes: a main cabinet body, side panels, a rear panel, side limiting rods, and a rear limiting rod. The top of the main cabinet body is rotatably equipped with an upward-opening plate. The upward-opening plate has a cavity inside. The left and right sides of the cavity have guide holes, and the rear side of the cavity has a second guide hole. The side panels are symmetrically arranged on the left and right sides of the main cabinet body with their upper surfaces flush. The rear panel is symmetrically arranged on the rear side of the main cabinet body with its upper surface flush. The inner side of the side panel has a first insertion rod passing through the first guide hole, and the first insertion rod has an annular groove. The side limiting rod has a first slot matching the first annular groove. The front side of the rear panel has a second insertion rod passing through the second guide hole, and the second insertion rod has an annular groove. The rear limiting rod has a second slot matching the second annular groove. The two ends of the rear limiting rod are matched and connected to the rear ends of the side limiting rods. A fastening bolt is provided in the middle of the rear limiting rod.

The utility model relates to a waste heat utilization system for an electrode foil production line, which is characterized in that the input end of a front-end formation liquid output pipeline is connected with a liquid outlet of a corresponding front-end formation tank, the output end of the front-end formation liquid output pipeline is provided with a first front-end branch and a second front-end branch, and the first front-end branch is connected with a corresponding first heat exchanger; the output end of the backflow pipeline is connected with a backflow opening of the corresponding front-end formation tank, the input end of the backflow pipeline is provided with a first backflow branch and a second backflow branch, the first backflow branch is connected with the corresponding first heat exchanger, and the second backflow branch is connected with the corresponding second heat exchanger. The rear-end formation tank is connected with the corresponding first heat exchanger through a formation liquid output pipeline and a formation liquid return pipeline, and the rear-end treatment tank is connected with the corresponding second heat exchanger through a treatment liquid output pipeline and a treatment liquid return pipeline. The high-temperature front-end formation liquid is used as a heat exchange medium to heat the rear-end formation tank and the rear-end treatment tank, so that the waste heat utilization of the production line is realized.

The invention relates to the technical field of garbage treatment, and provides an SOFC (solid oxide fuel cell)-based incineration plant collaborative incineration municipal sludge treatment system, which comprises a garbage leachate treatment unit for treating garbage leachate and producing sludge and biogas; the SOFC unit is used for receiving and utilizing the biogas generated by the landfill leachate treatment unit to generate power; the first waste heat recovery system is used for recovering waste heat generated by the SOFC unit and respectively providing the waste heat to the SOFC unit and the landfill leachate treatment unit for step-by-step utilization; according to the invention, the SOFC unit is used for generating power by utilizing biogas generated by decomposing the landfill leachate of the incineration plant, the generated electric energy can meet the operation requirements of equipment in the plant, and extra benefits can be created by surfing the net on the remaining part; and meanwhile, the first waste heat recovery system recovers high-grade waste heat generated in the running process of the SOFC unit, under the condition that the running heat requirement of the SOFC unit is met, the requirement of the sludge pyrohydrolysis unit or the landfill leachate treatment unit can be partially met, external energy and electric energy input is replaced, and the running cost of the system is greatly reduced.

This utility model relates to the field of stylus technology, and in particular to a counterweight pen cap and a stylus having the pen cap. The pen cap has a through hole, and at least two guide blocks for guiding and limiting are provided in the through hole. The two guide blocks are evenly distributed on the inner wall of the through hole and are integrally connected to the pen cap. The pen cap has a first magnet, which is detachably installed on the bottom surface of the pen cap. The pen cap includes a first semicircular plate and a second semicircular plate. One side of the first semicircular plate is hinged to one side of the second semicircular plate, and the other side of the first semicircular plate can rotate around the hinge axis and is magnetically connected to the other side of the second semicircular plate. When the user slides the pen cap and the second magnet ring magnetically connected, the center of gravity of the pen cap is biased towards the gripping area. When the pen cap slides the tail of the stylus, the pen cap is magnetically connected to the third magnet ring, and the center of gravity of the pen cap is biased towards the tail of the stylus. This design of adjusting the center of gravity of the stylus by sliding the pen cap can better adapt to the usage needs of different users.

The utility model discloses a fence type wiring terminal, which comprises an insulating base, a lug plate, a crimping sheet and a fixing bolt, the insulating base is provided with a terminal groove, and the lug plate and the crimping sheet are stacked in the groove. Guide blocks are arranged at the two ends of the crimping sheet, guide grooves in sliding fit with the terminal grooves are formed in the side walls of the terminal grooves, and each guide groove comprises an inlet section and a vertical section. According to the design, when the fixing bolt is loosened, the crimping sheet is restrained by the guide block and the guide groove, is not easy to separate from the terminal groove and can be taken out along a specific path, so that the crimping sheet is prevented from being lost; and meanwhile, the structure is simple, the convenience of mounting and dismounting is not influenced, the production cost is reduced, and the use safety of the wiring terminal and the stability of an electrical connection system are also remarkably improved.

The utility model relates to the technical field of spaceflight, and discloses a satellite deorbit release device which comprises a connecting shell, a plurality of power blocks are fixedly connected to the outer portion of the connecting shell, power rods are fixedly connected to the front sides of the power blocks respectively, and push blocks are fixedly connected to the outer portions of the front sides of the power rods respectively. The outer portions of the bottom ends of the close sides of the multiple push blocks are slidably connected with moving blocks correspondingly, the front sides of the far ends of the multiple moving blocks are fixedly connected with pressing plates correspondingly, the close sides of the multiple pressing plates are fixedly connected with compression pads correspondingly, and the close sides of the multiple moving blocks are fixedly connected with limiting plates correspondingly. According to the utility model, the problem that the unlocking mechanism is inconvenient to use when the satellite deorbit release device is used is effectively solved. The overall efficiency and reliability of the satellite deorbit release device are improved, and a solid guarantee is provided for safe and smooth completion of a deorbit task by a satellite.

This invention discloses a planning decision-making CIM system supporting dynamic model generation, comprising a display, an operation panel, a core data processing module, and a CIM database. The signal input and output terminals of the core data processing module are connected to the operation panel and the display, respectively, and the communication terminal of the core data processing module is connected to the CIM database. This invention also discloses a planning decision-making method supporting dynamic model generation. This invention features high integration, convenient operation, real-time linkage between indicator input and model dynamic adjustment, and development cost estimation capabilities, and can be widely applied in the field of urban construction informatization.

An electronic device includes a body and a key module. The body has a main key area and a receiving area. The main key area includes a plurality of main keys. The key module is detachably mounted in the receiving area. The key module includes a key and a module body. The key has a contact portion and a positioning portion. The module body includes a guide slot, a conductive member, a bearing seat and a control member. The bearing seat is movably disposed in the guide slot. The bearing seat has a receiving space and a positioning slot. The key is rotatably disposed in the receiving space. The positioning portion extends into the positioning slot to limit the key from moving in a direction away from the guide slot. The conductive member corresponds to the contact portion. The control member controls the position of the conductive member relative to the contact portion to allow the key to move with the bearing seat along the guide slot or to limit the key from moving along the guide slot and to maintain the electrical connection between the contact portion and the conductive member.

The present application relates to the field of unmanned vehicles, in particular to a skeleton assembly for unmanned vehicles and an unmanned vehicle with the same, which comprises a skeleton unit and corner modules connected to the skeleton unit; the skeleton unit comprises two lateral skeleton units and two end frame units; the two lateral skeleton units are connected by one end frame unit at each end; the lateral skeleton unit comprises a lateral vertical rod; the end frame unit comprises an end vertical rod; the two lateral vertical rods and the two end vertical rods are distributed in a ring shape; the present application forms a frame type vehicle body structure through the assembly of the two lateral skeleton units and the two end frame units; the loading cabin of the unmanned vehicle with the vehicle body assembly is equivalent to being suspended below the vehicle body assembly, and has the ability to directly reach the ground downward, and the corresponding ground clearance is set according to the driving and parking conditions to meet the operation requirements.

The utility model discloses an escalator with a disinfection device. The disinfection devices are arranged at the two rotating ends of the hand strap and comprise box bodies and floating pieces. A first liquid storage cavity, a liquid feeding groove and a liquid collecting groove are formed in the box body; a first communication port is formed between the liquid feeding tank and the first liquid storage cavity; the disinfection roller rotates around the central axis of the disinfection roller; the edge of the disinfection roller extends into the liquid feeding groove; a circle of sponge layer is arranged on the wheel surface of the disinfection roller; the floating part is arranged in the liquid feeding groove in a floating manner and is provided with a floating position for sealing the first communication port and a descending position for opening the first communication port; the wiping wheel rotates around the central axis of the wiping wheel; the edge of the wiping wheel extends into the liquid collecting tank; in the two groups of disinfection devices, the disinfection roller of the first disinfection device is in contact with the hand strap, and the wiping wheel of the second disinfection device is in contact with the hand strap. The hand strap of the escalator can be disinfected and wiped in real time, it is ensured that the hand strap is fully disinfected and is dry and comfortable, and automatic supplement of disinfectant is achieved.

The utility model relates to the technical field of water blowing air knife structures, in particular to a birch juice water blowing air knife combination which comprises an air knife assembly and a driving assembly fixed to the outer side of the air knife assembly, the air knife assembly comprises a water blowing air knife and positioning shafts fixed to the two sides of the water blowing air knife, and side grooves are formed in the two sides of an air outlet of the water blowing air knife in a penetrating mode. Locking bolts are fixed in the side grooves, the driving assembly comprises a driven shaft, driven teeth fixed to the two sides of the driven shaft and a connecting plate arranged on one side of the driven shaft in a sleeving mode, a motor is fixed to one side of the connecting plate, the output end of the motor is fixedly connected with the driving shaft and drives the driving shaft to rotate, and then the driving teeth drive the driven teeth to rotate; the driven shaft is driven to rotate, then the water blowing air knife is driven to rotate through the hanging rod structure fixed to the driven shaft, the stand columns on the two sides have the supporting effect on the driven shaft, after deflection, direction adjustment can be conducted, and the field operation requirement is met.

The electrophoresis device comprises an electrophoresis part, a part placing part, an electrolyte conveying part and an electrolyte aeration part, the electrophoresis part is an electrophoresis tank, an electrophoresis space is arranged in the electrophoresis tank, the part placing part is a part placing platform, and the electrolyte conveying part is arranged on the part placing platform. A grid baffle and a peripheral baffle are arranged on the part containing platform, the grid baffle and the peripheral baffle on the part containing platform are reasonably limited, a lifting air cylinder is matched to accurately immerse parts into electrolyte, a foundation is laid for a good electrophoresis effect, and the position of an electrode bar can be flexibly adjusted; a uniform electric field can be provided according to the shapes and sizes of different parts, uniform deposition of charged particles is ensured, the thickness and quality of an electrophoresis coating are more controllable by setting electrophoresis parameters, and diversified production requirements are met.

The utility model belongs to the technical field of flight seat adjustment, particularly relates to a simulated flight seat adjusting device, and aims to solve the problems that an existing traditional simulated flight seat adjusting device generally can only move in a single direction and cannot meet individual requirements of different players in different scenes, simulated flight experience is not real enough, and the simulation effect is poor. In order to solve the problems that in the prior art, the precision and stability of motion control are insufficient, the following scheme is provided, the device comprises a base, a front-back motion mechanism is arranged at the top of the base, a support is installed at the top of the front-back motion mechanism, the front-back motion mechanism is used for driving the support to move front and back, and a support is installed on the support; according to the multi-direction simulation flight platform, the operation requirements of players in multiple directions can be met, the simulation flight experience is more real, the movement direction of the seat can be accurately controlled, and the stability of movement control is improved.

The invention discloses a photovoltaic energy storage system switching control method based on islanding effect pre-judgment, which comprises the following steps of: 1, acquiring various parameters of a power grid in real time, establishing a power grid state database, and continuously monitoring various electrical parameters of the power grid by adopting a sensor; step 2, a machine learning algorithm is utilized, data in the power grid state database is taken as a training sample, an islanding effect pre-judgment model is constructed, and the islanding effect pre-judgment model is used for predicting the probability of power failure caused by faults of the power grid in a period of time in the future; 3, setting a pre-judgment probability threshold value, and when the prediction probability of the island effect pre-judgment model exceeds the threshold value, sending a grid-connected and off-grid switching signal; and step 4, after the switching signal is received, calculating the required energy storage output adjustment amount according to the current load demand and the output power of the photovoltaic cell. The charging and discharging states of the energy storage system are adjusted by controlling the energy storage converter, so that the sum of the photovoltaic power and the energy storage output can be matched with the load requirement.

The utility model relates to the technical field of electronic product supporting arms, in particular to an electric lifting telescopic supporting arm cart which comprises a cart body, a lifting driver, a rotary telescopic seat and a clamping mechanism. The trolley serves as a supporting and bearing platform of the whole device, and the lifting driver is stably fixed. The lifting driver provides lifting power in the vertical direction for the rotary telescopic base in a mechanical or electric mode. One end of the rotary telescopic seat is rotationally connected with the lifting driver, and certain flexibility is allowed to be kept in the lifting process; and the other end of the clamping mechanism is rotationally connected with the clamping mechanism, so that the clamping mechanism can rotate or telescopically adjust at a certain angle in a horizontal plane. The clamping mechanism is specially designed to be used for stably clamping the electronic product and allowing the electronic product to rotate in a pitching mode in the clamping state, and the display or operation requirements of different angles are met. Flexible fixing and operation of the electronic product are achieved, and the defects of a traditional device in the aspects of flexibility, adjustability and stability are overcome.