44results about How to "Ensure environmental adaptability" patented technology

The invention discloses a high-blocking corrosion-resisting lithium battery composite packaging film and a preparation method thereof; the composite packaging film sequentially comprises an outer layer, a middle layer and a heat-sealing layer from outwards to inwards, blocking layers are arranged between the outer layer and the middle layer and between the middle layer and the heat-sealing layer, and the blocking layer is aluminium foil with 7-15mum of thickness; the preparation method comprises the following steps: a. polyethylene terephthalate layer printing; b. composite polyethylene layer preparation; c. dry compound; d. slitting; compared with the prior art, all indexes are completely in accordance to the package standard of the lithium electronic battery, the safety performance is high, the sealing property, blocking performance and corrosion prevention performance are good, transportation and storage are easy, the volume is light, the usage is convenient, and the invention is suitable for the packing development tendency of current batteries.

The invention discloses a P code catching method and a P code catching device. The method comprises the following steps that IF (intermediate frequency) signals and local carrier signals from a carrier generator are multiplied, and I-Q two-path base band signals with rest Doppler frequency are obtained; the base band signals are extracted to obtain base band data to be processed, and the base band data to be processed is stored according to the sub segment; the local P code is used as a tap coefficient, each sub segment is respectively subjected to partial PMF to obtain accumulation results, and the code phase searching is completed; the filtering results after the PMF processing is subjected to buffer memory, in addition, fast FFT is respectively carried out, the frequency spectrum analysis is realized, and the frequency searching is completed; the accumulation according to points is carried out after the parallel model delivery is respectively carried out on the output results of the FFT processing, M point incoherent accumulation results are obtained, and the caught results are found, wherein the caught results include but are not limited to the maximum correlation value, the second correlation value, the frequency, the phase, the paragraph and the like. The method and the device provided by the invention have the advantages that a PMF and FFT combination mode is adopted, the P code catching sensitivity is improved, and the catching speed is obviously accelerated, so the requirements of actual signals are met.

The present invention discloses a sheet metal surface anomaly detection method based on image analysis. The mean value and the variance of an image are employed to perform coarse detection to obtain a suspected anomaly set and a normal set; a compressed sensing principle is employed to perform feature learning of the normal set, the Bayes idea is utilized to perform analysis and determination of the anomaly set so as to realize fine detection of surface anomaly, and therefore the method of combination of the coarse detection and the fine detection is employed to perform rapid detection of surface defects and the accuracy and the timeliness of the detection are improved.

The invention discloses a modular superconductivity electronic equipment pod compact in structure. The modular superconductivity electronic equipment pod is characterized in that the pod is composed of an upper end cover, a lower end cover, a shell and a pod-penetrating piece, and the pod-penetrating piece is fixed to the center of the upper end cover; three eccentric-circle pile plates are adopted in the pod to establish a modular stack structure and to provide support for a superconductivity sensor assembly and a measurement and control assembly under the precondition that a vacuum bleeder valve outside a Dewar cylinder body is prevented from being bumped, and therefore integrity of a Dewar and a stack assembly is achieved; the modular stack structure formed by the three eccentric-circle pile plates is in rigid connection with the Dewar cylinder body through lengthened bolts between the cylinder body and a plug, and the eccentric-circle pile plate structural components of the stack assembly are connected through threaded rods; an SQUID device and a selected direct-reading type SBC are placed in a low-temperature container Dewar formed by the Dewar cylinder body and the Dewar plug. The pod is easy to realize, low in cost and capable of guaranteeing maintainability, expandability and environmental suitability of superconductivity electronic equipment within limited space.

The invention discloses a dual-mode multipurpose continuous zooming optical system comprising a driving mechanism and a diaphragm. The dual-mode multipurpose continuous zooming optical system also comprises a front fixed lens group, a zooming lens group, a compensating lens group, an aberration stable lens group and an optical filter which are arranged from the left to the right in turn. The left side of the front fixed lens group is an object plane. The right side of the optical filter is the focal plane of the dual-mode multipurpose continuous zooming optical system. The front fixed lens group, the zooming lens group, the compensating lens group, the aberration stable lens group and the optical filter are coaxial in central axis. The driving mechanism drives the zooming lens group, the compensating lens group and the aberration stable lens group to linearly move in a forward-and-backward direction in the optical axis direction of the dual-mode multipurpose continuous zooming optical system to realize continuous zooming. The total length of the dual-mode multipurpose continuous zooming optical system is constant in the process of continuous zooming. The dual-mode multipurpose continuous zooming optical system is an optical system which is small in size, compact in structure and particularly suitable for an optoelectronic pod and can realize the function of continuous zooming and has two working modes of high-definition video photographing and ultrahigh-definition photographing imaging.

The invention discloses a male urinal thermochromic marking material and a manufacturing method thereof. The material is of a shell-core microcapsule structure and comprises a shell and a core, the core comprises an inner core body and an outer core body, the inner core body is an antibacterial temperature-sensitive network hydrogel material, the outer core body is a thermosensitive reversible color-changing microcapsule, the shell is a water-swelling polymer copolymer, and the weight ratio of the shell to the outer core body to the inner core body is 1: 1: 8 to 2: 1: 1.5. The antibacterial temperature-sensitive network hydrogel material is prepared from silver nitrate and antibacterial plant extract effective components; the thermosensitive reversible color-changing microcapsule comprisesa color former, a color developing agent, a solvent and a semi-synthetic polymer material effective component. The mark can change color after making contact with urine with the human body temperature when a user uses the mark, antibacterial active substances are released in the using process and after the user uses the mark to maintain sanitation of a urinal, the using interestingness is improved, meanwhile, the attention of the user is improved, urine splashing is reduced, the enjoyment of the user is improved, and the environment refreshing atmosphere is improved.

The invention discloses an optical fiber underwater sound collision part and target-missing amount measuring system. The system comprises an optical fiber grid measuring subsystem, an optical fiber hydrophone measuring subsystem, a wireless receiving display control terminal and a ship-borne wireless communication device. When a test bullet hits a target ship, the optical fiber grid measuring subsystem collects optical fiber on-off information of the collision area; and when the test bullet does not hit the target ship and falls into water, the optical fiber hydrophone measuring subsystem collects sound signals generated when the test bullet falls into water. The wireless receiving display control terminal is used for receiving and analyzing collected data, and therefore the collision position or the target-missing amount information of the test bullet is obtained. According to the optical fiber underwater sound collision part and target-missing amount measuring system, the collision damage information can be answered in real time, meanwhile, the measurement on the target-missing amount during target missing of the test bullet is achieved, cost is low, and reliability and measuring precision are high.

The invention puts forward a cross digital signing method and a cross digital signing system for application software under a domestic operating system. The method comprises the following steps: a software developer copies to-be-released software to a special signing device; the special signing device signs the to-be-released software; the special signing device releases signing software and a signing certificate generated to a special management device; and the special management device signs the signing software for the second time in a cross manner, generates cross signing software and a cross signing certificate, and releases the cross signing software and the cross signing certificate to an application store. The invention further puts forward a corresponding cross digital signing system. Through cross signing using a special signing device, the reliability of to-be-released software is strengthened, and adverse consequences caused by illegal certificate misappropriation are prevented. Moreover, software developer identity management is realized.

The invention belongs to the photoelectric technical field, relates to a photographic object lens optical system, and specifically relates to a compact continuous zooming optical system. The optical system comprises a front fixed lens group, a zooming lens group, a compensation lens group, a diaphragm and a rear fixed lens group which are coaxially disposed in turn from an object plane to a focal plane. In the full zooming section range, the optical system can achieve high-definition imaging and a continuous zooming function for more than 20 times. All focal-length center view fields and edge view fields have good imaging quality in a continuous change process of a focal length. A zooming core composed of the zooming lens group and the compensation lens group moves continuously according to a movement rule given in design, and always moves back and forth on the optical axis during internal zooming; the aperture F number is constant while zooming, the total length is fixed, and the mass center has a small change; and the system is small in size, and the structure is compact.

The invention provides a paint film testing device. The paint film testing device comprises a chassis, a sample platform, a pull arm, a support, a testing needle, and a driving member; the sample platform is installed on the chassis and is used to position a sample to be tested; the support vertically extends upwards from the chassis and supports the pull arm; the testing needing is connected to the pull arm, the needle tip extends to the sample platform and is tightly pressed against the surface of the sample to be tested; and the pull arm is driven by the driving member and is capable of reciprocating relative to the support so as to drive the needle tip of the testing needle to reciprocate on the surface of the sample to be tested. The invention further provides a testing method for testing the adhesive force of paint film of a lamp. The provided paint film testing device and method can measure the adhesive force of paint film of a lamp, and thus the reliability and environmental adaptability of a lamp can be guaranteed.

A lamp cable performance testing tool comprises a working table, a cable bending unit, a tool power supply, and a voltage measuring unit, wherein the working table is provided with a tool base and a support arranged on the tool base; the cable bending unit comprises a pressing block and a wire pressing groove; the voltage measuring unit comprises an input connection assembly, an output connection assembly and a measuring device; and the cable is electrically connected with the input connection assembly and the output connection assembly. After the cable bending unit enables the cable to be bent in a set mode, the measuring device measures input voltage and output voltage of the cable, the voltage difference between the output voltage and the input voltage is set to be a voltage drop value, the voltage drop and the input voltage are compared, the cable meets performance requirements if the voltage drop is not larger than the set percentage ratio of the input voltage, qualification is judged, or, disqualification is judged. Thus, performance of the cable can be tested, and reliability and environmental adaptability of bent use for the cable can be ensured.

The invention discloses a total phosphorus turbidity compensation method applied to online monitoring of a high-turbidity water body. The method comprises the steps of correcting absorbance of turbidity at 700nm by taking colorimetric data of an actual water sample as a turbidity compensation parameter and combining dilution of a reagent to the water sample and a turbidity cardinal number of the water sample in an experimental method without establishing a turbidity marked line in advance; and deducting the total absorbance to obtain the absorbance contributed by the total phosphorus at 700nm,and finally calculating the total phosphorus concentration in the water sample. According to the algorithm, the influence of turbidity on total phosphorus detection can be greatly eliminated, the change condition of the total phosphorus content in a water environment can be accurately monitored, the algorithm is not restricted by a target monitoring place, the algorithm can adapt to water qualitychange, and an effective and reliable universality scheme is provided for online monitoring of total phosphorus.

The invention discloses a power plug pulling force testing device, which comprises a base, a first support, a second support, a rotating assembly, a lever, and a hanging piece, wherein the base comprises a bearing surface; one end of the second support and one end of the first support are arranged on the bearing surface; the rotating assembly comprises a turntable and a handle; the turntable is connected onto the other end of the first support in a rotating mode and is eccentrically arranged onto the other end of the first support; the handle is arranged on the turntable; one end of the lever is connected onto the other end of the second support in a rotating mode; the other end of the lever abuts against the peripheral surface of the turntable; the lever comprises a fixing part; and the hanging piece is used for being connected onto a tested power plug. According to the power plug pulling force testing device, the lever rises or falls in the vertical direction via the rotating assembly, the hanging piece connected with the tested power plug also rises and falls, different pulling forces are applied to the power plug for testing, and reliability and environmental adaptability of the tested power plug can be effectively ensured.

The invention discloses a light smart control system for unsupervised farm, and relates to the technical field of farm light control. The light smart control system comprises a data collection unit, an environment feature matching module, an environment feature database, a central processing unit, a storage unit, a terminal, a debugging unit and a lamp bank unit; wherein the data collection unit is connected with the central processing unit through the environment feature matching module; the environment feature database is connected with the central processing unit through the environment feature matching module; the storage unit is connected with the environment feature database through the debugging module; the central processing unit is connected with the lamp bank unit through a dimming module. By adopting the light smart control system, the lamp bank unit is controlled according to the light environment state in a farm tent through the environment feature matching module, and theproblems of high use cost of the light control system in the farm and poorer unsupervised assisting effect are solved.

The invention relates to a fiber-optic gyroscope zero offset determination method. The method comprises the following steps: S1, obtaining a zero-bias temperature rise model table and a zero-bias temperature drop model table under a preset temperature change rate; s2, querying a zero-bias heating model table and a zero-bias cooling model table, and obtaining a heating zero-bias value and a cooling zero-bias value corresponding to the current environment temperature of the tested fiber-optic gyroscope; s3, calculating a zero-bias heating model weight and a zero-bias cooling model weight corresponding to the current temperature; and S4, carrying out weighted operation on the temperature rise zero-bias value and the temperature drop zero-bias value corresponding to the current temperature obtained in the step S2, and finally obtaining the gyroscope zero-bias value of the fiber-optic gyroscope at the current environment temperature and the temperature change rate. The weighted zero-bias compensation value can be calculated in real time according to the temperature, the temperature rising and falling trend and the temperature change rate, the problem that a traditional zero-bias compensation method is poor in environmental adaptability is solved, and the method is suitable for zero-bias modeling and compensation of fiber-optic gyroscopes of different models or precisions.

The invention discloses a surge protection circuit, and relates to the technical field of an emergency protection circuit device used for limiting overvoltage while a circuit is not cut off. The surge protection circuit comprises a surge suppression circuit and a voltage sharing matching circuit, wherein the surge suppression circuit comprises a clamping type surge protector and a switch type surge protection device, one end of the clamping type surge protector is a wiring end of the protection circuit, the other end of the clamping type surge protection device is connected with one end of the switch type surge protection device, the other end of the switch type surge protection device is the other wiring end of the protection circuit, the voltage sharing matching circuit comprises voltage sharing matching resistors R1 and R2, the resistor R1 is connected in parallel with the clamping type surge protection device, and the resistor R2 is connected in parallel with the switch type surge protection device. By the circuit, the residual voltage during surge impact of the whole machine is reduced, the environmental adaptability of the circuit is effectively ensured, and the cost of the whole machine is optimized.

The invention discloses an intelligent reflector communication beam selection method based on a beam index map, which comprises the following steps: optimal beam pair information of a base station end and an intelligent reflector end corresponding to each user position are obtained, and an optimal beam index map is constructed and updated based on the user position in time; when the base station side communicates with a user through the intelligent reflecting surface, the user side acquires a real-time geographic position through multiple positioning modes, acquires a candidate beam pair set by means of the established beam index map, and directly performs beam selection or performs real-time beam scanning on the candidate beam pair set according to the occurrence frequency of different beam pairs; and therefore, intelligent reflector communication beam selection without channel training or lightweight channel training is realized. The method solves the problems that the intelligent reflector communication channel is high in estimation difficulty, a traditional beam scanning method is large in training overhead, and the training process is tedious, simplifies the real-time beam selection process, and greatly improves the effective communication rate.

The invention discloses a machine vision device capable of achieving double-faced imaging. The machine vision device comprises a camera, a mirror, a wedge block, an installation groove and a fastening screw, wherein the installation groove is cuboid, the middle of the bottom of the installation groove is provided with a bar-shaped through hole in the length direction, the inside of the installation groove is provided with the wedge block, the bottom of the wedge block is provided with the fastening screw, the fastening screw penetrates through the through hole and is fixed through a fastening nut, the wedge block is provided with the mirror, one side of the mirror is hinged to the installation groove, and the camera is arranged over the installation groove. The camera can simultaneously collect the images of the front face and the back face of a workpiece, high flexibility of adjustment of the imaging effect is achieved, adjustment can be achieved at any time according to specific characteristics of the workpiece, the situation that the whole structure greatly changes due to changes of temperature of external environment cannot occur, good environmental adaptation is guaranteed, and the machine vision device is simple in structure, convenient to dismantle and capable of being taken down at any time for cleaning and maintenance.

The invention relates to an anti-shock horizontal self-locking device for a support of a bridge simply support. The device can stimulate the horizontally constrained simply support under the action of equal accidental load of an earthquake, and provides enough horizontal constraint for a bridge if necessary. The novel anti-shock horizontal self-locking device for the bridge support cannot only meet vertical constraint of the simply support in a bridge normal using process, but also stimulate bolt pin to provide horizontal constraint for the bridge under the equal action of an earthquake load. The device is composed of a pier fixing stationery end and a moving end connected to a bridge floor structure. The device provided by the invention provides a triggered type support self-locking device in a pure mechanical manner for solving the problem that the support of the simply support of the bridge cannot provide enough horizontal constraint under the action of earthquake load, achieves the purpose that the simply support separately releases and constrains horizontal degree of freedom at ordinary times and in earthquake, and is simple to manufacture, high in adaptability and has a wide application prospect in the field of bridge structure.

The invention discloses a combined switch cabinet, which includes a housing, a cable room and a circuit breaker room are arranged at the bottom of the housing, a bus bar room is arranged above the cable room, a relay instrument room is arranged above the circuit breaker room, the cable room, the circuit breaker room, the bus bar room and the relay instrument room are separated by steel plates, therelay instrument room and the circuit breaker room share the front cabinet door and the bus room and the cable room share the rear cabinet door, a current transformer, vacuum circuit breakers and mechanical interlocks are arranged inside the circuit breaker room, the relay instrument room is provided with secondary equipment, a pressure relief channel is arranged on the top of the circuit breakerchamber and a pressure relief device is arranged on the top plate of the relay instrument chamber, the cable room is provided with a voltage extraction device and a lightning arrester, a first disconnector is arranged between the cable room and the circuit breaker room, a main bus bar and a branch bus bar are arranged between the bus bar room and the relay instrument room, and a second disconnector is arranged between the bus bar room and the relay instrument room, and the main bus bar runs through the cable room and the relay instrument room.

The invention provides a cable wear resistance testing device. The cable wear resistance testing device comprises a lamp support, a rotary disc, and a driving member. The lamp support is used to support a lamp, the rotary disc is provided with a first through hole, and the driving member is used to drive the rotary disc to rotate. A cable of the lamp goes through the first through hole, during the rotation process of the rotary disc, the surface of the cable is rubbed by the friction force, and thus the wear resistance of the cable can be tested. The invention also provides a testing method for testing the wear resistance of a cable going through a lamp hole. The provided cable wear resistance testing device and method can measure the wear resistance of a cable going through a lamp hole, and thus the reliability and environmental adaptability of a lamp cable are guaranteed when the cable goes through a lamp hole.

The invention discloses an air taxi and a system thereof. The air taxi comprises an airplane body and is characterized in that the airplane body specifically comprises a body, wings, a tail wing and alanding gear; the body is in the form of streamline; the wings are distributed wings and are correspondingly distributed on the two sides of the body; the front and rear wings are arranged on each side; fairings are arranged at the tail ends of the wings; and propellers are mounted on the fairings. The air taxi has the characteristics of small volume and small noise; and moreover, a vertical lifting function can be realized, and the cruising ability of the air taxi can be completely guaranteed; and good technical basis is provided for using the air taxi as the air taxi in a city. According tothe system of the air taxi, extremely high safety performance and stability of the system of the air taxi are guaranteed, the worry of a passenger about the safety problem of the air taxi can be further eliminated, and more convenient service with higher quality is provided.

The invention discloses a fixing device comprising two fixtures and a connecting rod. The fixing device is banded onto two first banding components of the fixtures through the connecting rod, respectively, thus allowing a lamp to be rotatably connected to the connecting rod; in this way, during an anti-vibration test, the lamp vibrates along with vibration of the anti-vibration test and rotates during vibration, so the actual condition of the lamp in the vibration environment is actually simulated; besides, by distributing the first banding components on a fixing plate along a preset arc form, the vibration test can be performed on the lamp at different angles, and the anti-vibration performance of the lamp is tested, so that reliability and environmental suitability of the lamp in the actual use are further guaranteed. The invention further provides an anti-vibration performance test device of the lamp.

The invention relates to a method for improving the safety of a Doppler radar, belongs to the technical field of speed measurement radars, and solves the problems that the appearance of an existing Doppler radar is not conformal with a carrier, the required installation space is large, and the safety of the Doppler radar is guaranteed. The method for improving the safety of the Doppler radar comprises the following steps of: S1, performing protection treatment on the surface of each extension; S2, arranging each extension set of the radar in a shielding box body structure of each extension set, so as to realize the modular design of each extension set of the radar; S3, setting connectors of all the extensions to be in a differential structural form, and setting identification marks; S4, installing the shielding box bodies of all the extension sets in a main body frame of a conformal structure through using vibration reduction structures; and S5, installing an upper cover plate of the conformal structure, and sealing each extension of the radar in a cavity of the conformal structure. According to the method, the Doppler radar and the mounting surface can be conformal, the mounting space is small, and the safety is high.

The invention discloses a data interaction method and system based on double communication channels and a valve terminal control system. The method comprises the steps: receiving an authentication request sent by a control host through a management channel after the control host is accessed into a server through the double communication channels, and carrying out the identity authentication; after the identity authentication is passed, allocating resource types and resource quantities to the control host according to the access quantity and the data length of the control host, and acquiring the channel width of a data channel according to the resource types and the resource quantities; carrying out channel allocation according to the connection state of the control host and channel parameters and communication code rates required by communication, acquiring channel configuration files, and sending the channel configuration files to the corresponding control host; and after a channel configuration response of the control host is received through the data channel, obtaining a transmission priority according to the connection rate and the data refresh frequency between the server and the control host, and carrying out data interaction according to the transmission priority. A multi-frequency-band sharing mode is adopted, and a communication mechanism is upgraded so that the data interaction speed is higher, and the reliability is higher.

The invention discloses a stress-resisting test device of an extension socket. The stress-resisting test device comprises a base, a motor, a dynamometer and a fixed seat; the base comprises a carrying surface; the motor is connected to the carrying surface, the motor comprises a motor shaft, and the center axis of the motor shaft is perpendicular to the carrying surface; a storage seat is arranged on the carrying surface, the storage seat is provided with a slide groove, one end of the slide groove forms a closed end, and the closed end of the slide groove is adjacent to the motor; one end of the dynamometer is connected to a motor shaft by virtue of a connecting rope and arranged between the storage seat and the motor, and the other end of the dynamometer is provided with a plug. According to the stress-resisting test device of the extension socket, a tested extension socket is arranged in the slide groove, so that the connecting rope and the plug are respectively connected to two opposite ends of the dynamometer; since the connecting rope and the plug are respectively connected to the motor and the tested extension socket, under the rotation of the motor, the connecting rope and the plug can produce pull forces in opposite directions for the dynamometer so as to apply stress onto the tested extension socket, the stress-resisting test can be carried out, and the reliability of the tested extension socket in actual use can be effectively guaranteed.

The embodiment of the invention provides a rocket test parameter selection method and device, a storage medium and an electronic device. The method comprises the steps that one or more target cabins are selected from a rocket to be tested; determining a test condition for the target cabin section, the test condition comprising a noise environment test condition; and determining test equipment according to the noise environment test condition, the test equipment comprising equipment for noise test. By the adoption of the scheme, it is ensured that the environmental adaptability of the rocket meets the requirement, meanwhile, the test cost is reduced, and test resources and test time are saved.

The invention provides a magnetic resonance signal phase closed-loop control method and system based on variable parameter control. The method comprises the following steps: generating a digital reference signal and a magnetic field excitation signal based on a DDS technology; acquiring a magnetic resonance signal of the atomic air chamber; respectively filtering the digital reference signal and the magnetic resonance signal, and adjusting the filtering parameters of the digital reference signal and the magnetic resonance signal in each operation period; calculating to obtain a phase difference between the magnetic resonance signal and the digital reference signal; performing phase compensation on the phase difference between the magnetic resonance signal and the digital reference signal; and adjusting frequencies of the digital reference signal and the magnetic field excitation signal according to a difference value between a phase difference between the magnetic resonance signal and the magnetic field excitation signal and an expected phase difference to complete phase closed-loop control of the magnetic resonance signal. According to the technical scheme, the technical problems that in the prior art, noise interference of a phase demodulation method is large, and a calculation result drifts greatly along with the change of the environment temperature are solved.

The invention relates to the technical field of spraying equipment, and discloses a multifunctional electrostatic powder spraying device which comprises a spraying head cavity, a pressurization convolution cavity and an electrostatic spraying cavity are formed in the spraying head cavity, and the pressurization convolution cavity communicates with the electrostatic spraying cavity through a flow guide channel. A spiral flow guide mechanism used for guiding powder into the flow guide channel in a spiral mode is arranged in the pressurization convolution cavity, a backflow restraining mechanism is arranged in the flow guide channel, a discharge basin is arranged on the inner wall of the electrostatic spraying cavity in a suspended mode through a basin support pipe, an opening of the discharge basin faces the tail and is right opposite to a front opening of a flow guide plate, and a discharge needle is located at the axis position of the discharge basin. By changing the flowing direction of powder in the spraying head cavity, enabling the powder to pass through the discharge needle in a spiral surrounding mode and additionally arranging a novel structure of the discharge basin, dead-corner-free attachment is guaranteed, uniform charge attachment of the powder is achieved, the thickness of a spraying layer is more uniform and consistent, the internal flowing direction of the powder and the mute link are optimized, and the durability and the environmental adaptability of the spraying head are ensured.