Use badminton shoes reasonably

1. When selecting sneakers, please choose according to your sports requirements and favorite styles. Because different types of sneakers have different design requirements and use requirements, it is necessary to choose sneakers suitable for your sports and need.

2. When choosing the number of the shoes, it is best to try it in person: when testing the shoes, you should use your feet to the ground, adopt an upright posture, and use your thumb up and down.Use the squat posture to confirm whether the shoe is grinded with the neck.

3. shoes are the fat marks of shoes.This needs to be based on the characteristics of sneakers and feet fat.In addition, adjusting the tightness of the shoelaces can also meet your requirements, and usually do not press the back.

4. When the shoes are dirty, you can use water dipped in a clean water to gently wash, then rinse it with water, and place it in a ventilated and cool place to avoid direct sunlight.Do not use warm air or fire to dry, so as not to cause aging, open glue, fade and severe deformation.Do not soak for a long time when washing, and generally soak time must not exceed 2 hours.

5. Most of the raw materials of sneakers are artificial synthetic polymer materials (mostly polyol nylon mesh and non -woven artificial leather, and most of the soles are made of rubber or rubber foam materials).In contact with organic reagents and oil solutions, it is not advisable to wear it for a long time in high temperature environments.Generally, the temperature of wearing or washing should not be higher than 45 degrees Celsius.

6. If it is stored for a long time, wash the shoes first, and store it in a cool ventilation at the cooling ventilation to avoid mildew.leather shoes are best dragged up with paper groups or shoes in the shoes to avoid severe deformation.

7. In order to make you reach a satisfactory dress, please treat you fairly. Remember not to wear general jogging shoes or do walking shoes for football.To give full play to your technical expertise.

badminton shoes maintenance

1. Do not contact organic reagents and oil solutions, compounds, and leather noodles.

2. It should not be worn for a long time in a high temperature environment.

3. Try to ensure that wearing in the environment of 45 degrees Celsius to minus 20 degrees Celsius.

4. If you do nt wear it for a long time, you should clean the shoes first and store it in a cool place to avoid pushing moldy.It is best to use filling in the shoe to avoid deformation.

5. Do not wear general jogging shoes or walking shoes for football.No kind of sneakers can be contacted with sharp weapons.

badminton shoes washing

1. When the shoes are dirty, you can use water dipped in clean water and wash it gently, and then rinse with water.

2. Do not use strong brush or wash the hot process and the corner of the printing pattern.

3. It is best to dry it with a washing machine after washing.

4. If you store it for a long time, you should wash the shoes first. After drying, place it and store it in a cool vent of ventilation so that the shoes have sufficient time to blow dry to avoid mold.

5. Do not use heating or light fire to dry, which can easily cause shoe aging and open gum, deformation and deformation.

6. Do not soak for a long time when brushing, and the soaking time must not exceed 2 hours.

7. The nylon mesh cloth and artificial tanning leather on the running shoes are relatively easy to maintain. You can wash it with a sailor. It is best not to soak it with a washing machine or soaked with water.

8. Wash the shoe and laces with neutral soap/powder.Take out the insole when washing the shoes, brush it gently with a soft brush, and then rinse dry.

1. How is the GPS positioning system positioning

The 24 GPS satellites run around the earth at a high altitude of 12,000 kilometers from the ground, so that at any moment at any time, any at all at the ground can be observed at the same time.

Because the position of the satellite is accurate, in the GPS observation, we can get the distance from the satellite to the receiver. Using the distance formula in the three -dimensional coordinates, the three satellites can be used to form three equations to solve the position of the observation point (x X, y, z).Considering the error between the clock of the satellite and the receiver clock, there are actually 4 unknown, X, Y, Z, and clock difference, so the 4th satellite needs to be introduced to form 4 squares to solve, so as to obtain the observation point of the observation pointLavels and heights.

In fact, the receiver can often lock more than 4 satellites. At this time, the receiver can be distributed into several groups according to the satellite constellation, and each group is 4, and then the group with the smallest error is selected by the algorithm for positioning, thereby positioning, so asImprove accuracy.

Due to the errors of satellite Running tracks and satellite clocks, the impact of atmosphere on the signal of the flow layer, the ionization layer on the signal, and the artificial SA protection policy, the positioning accuracy of the civil GPS is only 100 meters.In order to improve the positioning accuracy, the differential GPS (DGPS) technology is generally adopted to establish a reference station (differential table) for GPS observation. The accurate coordinates of the known benchmark station are used to compare the observation values to obtain a correction number and release it outside the outside world.EssenceAfter receiving the correction number, the receiver compares it with its own observation value, eliminates most of the errors, and obtains a more accurate position.Experiments show that the positioning accuracy can be increased to 5 meters by using differential GPS.

vehicle navigation system is mainly composed of navigation hosts and navigation display terminals.The built -in GPS antenna will receive at least 3 data information transmitted from 24 GPS satellites surrounding the earth, thereby determining the current location of the car.The navigation host is matched with the electronic map data determined by the GPS satellite signal to determine the accurate location of the car in the electronic map.

On this basis, various functions such as driving navigation, route recommendation, information query, and playback AV/TV will be realized.Drivers only need to watch the screens on the display and listen to voice prompts, and manipulate the remote control in the hand to achieve the above functions, so as to drive easily and freely.

Global Positioning System is the second -generation satellite navigation system in the United States.It was developed on the basis of the Ziwuyi satellite navigation system, and it adopted the successful experience of the Wuwuyi system.Like the Ziwuyi system, the global positioning system consists of three parts: space part, ground monitoring, and user receiving machines.

According to the current plan, the space part of the global positioning system uses 24 satellites with a height of about 20,200 kilometers to form a satellite constellation.21 3 satellites are near -circular orbit, and the operating cycle is about 11 hours and 58 minutes. It is distributed on the six orbit planes (four on the surface of the orbit), and the orbital inclination angle is 55 degrees.The distribution of satellites allows more than four satellites at any time around the world at any time, and can maintain a good positioning and solving geometric graphics (DOP).This provides continuous global navigation capabilities in time.

The ground monitoring section includes four monitoring stations, one upward injection station and a main control station.The monitoring station has a GPS user receiver, atomic clock, a sensor collected by local weather data, and a computer that processes preliminary data.The main task of the monitoring station is to obtain satellite observation data and send these data to the main control station.The main control station is located at the Vanden Fort Air Force Base.It implements comprehensive control of the ground monitoring department.The main task of the main control station is to collect all observation data of the GPS satellites in each monitoring station, and use these data to calculate the orbit and satellite clock of each GPS satellite.The upward injection station is also located at the Vanden Fort Air Force Base.Its task is mainly to inject such navigation data and the instructions of the main control station into the satellite when each satellite runs to the sky.This injection is performed once a day for each GPS satellite and the final injection before the satellite leaves.

The global positioning system has the characteristics of good performance, high accuracy, and wide application. It is by far the best navigation positioning system.With the continuous improvement of the global positioning system and the continuous improvement of software and software, the application fields are continuously developing. At present, the various departments of the national economy have begun to gradually penetrate people's daily life.

2. Positioning principle of GPS navigation

d1 = [(x1-x2)^2 (y1-y2)^2 (Z1-Z2)^2]^1/2 c (vt1-vt0)

d2 = [(x2-x)^2 (y2-y)^2 (Z2-Z)^2]^1/2 c (vt2-vt0)

d3 = [(x3-x)^2 (y3-y)^2 (Z3-Z)^2]^1/2 c (vt3-vt0)

d4 = [(x4-x)^2 (y4-y)^2 (Z4-Z)^2]^1/2 c (vt4-vt0)

In the above four equations, the coordinates of the measuring point X, Y, Z, and VTO are unknown parameters, where DI = C TI (i = 1, 2, 3, 4).

DI (i = 1, 2, 3, 4) is satellite 1. Satellite 2, satellite 3. Satellite 3. Satellite 3, satellite 4 to receiver.

TI (i = 1, 2, 3, 4) is satellite 1. Satellite 1. Satellite 2. Satellite 2, satellite 3, and satellite 4 signals to reach the time of the receiving machine.

C is the speed of transmission of GPS signal (ie, the speed of light).

The meaning of each parameter in the four equations is as follows:

X, Y, and Z is the spatial right -angle coordinates of the coordinates to be tested.

XI, Yi, Zi (i = 1, 2, 3, 4) are satellite 1. Satellite 1. Satellite 2. Satellite 2, Satellite 3, Satellite 4's spatial right -angle coordinates at the time of T, can be obtained by satellite navigation.

VT I (i = 1, 2, 3, 4) is satellite 1, satellite 2, satellite 3. Satellite 3, and satellite 4 satellite clocks, which are provided by the satellite star calendar.

VTO is the bell of the receiver.

From the above four equations, the clock vTO of the coordinates of X, Y, Z and the receiver at the above four equations.

The basic positioning principle of GPS is: satellite sends its own star parameters and time information uninterrupted. After receiving this information, the user receives the three -dimensional position, three -dimensional direction, and time information of the receiver.

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What should I do

1. Wash with soap, toothpaste or detergent. When cleaning, you need to pay attention. Wipe it gently with a soft wet cloth.

2. Apply soap or toothpaste, and use a soft brush with a soft brush with water.

3. When drying, the toes of the insoles are facing down, dried in the ventilation, and the white part of the shoe body is wrapped in toilet paper to avoid exposure.

4. Pay attention to daily maintenance. Do not wear it on rainy days. You can also wear less in mud roads. Suitable for shopping malls, roads, squares, floor sections.

5. Avoid stepping on sharp and fine stones, otherwise the materials on the soles of the feet will be tied out of small holes.

Which Adidas Boost series is better

1. Adidas Originals EQT Support 93/17

EQT is a classic shoe designed by Adidas in 1993.Today, Adidas has completely reshaped these shoes. The improved EQT is equipped with Adidas Primeknit upper, and incorporates a large thick BOOST midsole.The new improvement in retro styling has renewed this pair of EQT SUPPORT 93/17.The large -area midsole brings an unprecedented foot experience to EQT SUPPORT 93/17. Compared with running shoes like UB, EQT SUPPORT 93/17 is more suitable to become casual shoes for daily travel.

2. Adidas Inki Runner Boost

Adidas Iniki was designed in the 1970s and was one of the classic adidas shoes.Adidas Iniki is equipped with a large area of Boost midsole, which brings feedback, and basically kills mainstream UB, NMD and other styles.The only defect is that the breathability and wrapping are lacking. Inki upper is made of nylon, the toe and the heel are suede, and the inner lining is replaced by the elastic mesh.Without the blessing of the Primeknit upper, it is naturally impossible to compare with mainstream running shoes in terms of wrapping.

3. Adidas Ultra Boost4.0

As soon as UB is listed, it is under the name of the strongest running shoes. Indeed, having Boost's UB is indeed unique in the Running shoe industry.It should not be denied that UB is a good pair of sneakers. Whether it is daily travel or occasional exercise, UB is a good choice.

4,Yeezy Boost 350 V2

Yeezy Boost 350 V2 is also the coconut shoes in our mouths. The big sole is filled with Boost midsole, which provides a good foot feeling. With the perfect design, it can be said to be a great shoe.

5. Yeezy Boost 700

700 is also ugly shoes, daddy shoes.The retro appearance design and a thick feeling make this pair of shoes have the title of ugly shoes, but it is really handsome after getting on the feet.Of course, this shoe is also equipped with Boost midsole technology, and the foot feels very good.

Adidas shoe clothing recommendation & gt; & gt;

1. baby sleeping bags better or quilt

From the perspective of warmth performance, there is no essential difference between baby sleeping bags and quilts.However, for infants and young children, Sleeping bags have anti -kicks and the advantages of avoiding blind mouth and nose are the first choice for baby sleep.

Pay attention to two points when choosing a sleeping bag. First of all, choose a loose style.This is because the thermal insulation principle of the sleeping bag is the same as the quilt. They use the air layer with the body to reduce the exchange with the cold air of the outside world. Therefore, the tight sleeping bag is not so warm.

Secondly, it is not necessary to choose too much size for children to wear for a few years, especially if the neckline is fitted, so as not to be covered in a sleeping bag, or induce respiratory diseases due to bare shoulders and necks.

The commercially available Sleeping bags generally indicate the applicable temperature range, and everyone can buy according to the actual situation.If the room temperature is lower than the temperature of the sleeping bag, you can stamp the child with a thin layer of quilt or blanket to ensure that the child's physical sensation is comfortable.

How to cover the quilt is also particular, unless it is the severe cold, it is not recommended to cover the child too thick quilt to avoid covering the disease.In addition, the quilt only needs to cover the child's chest position. Do not surpass the neck, otherwise there will be a risk of suffocation of the mouth and nose.

2. What is the difference between baby sleeping bags and Bags

The baby's sleeping bag is a sleeping supplies that can prevent the baby from being kicked with cold.baby sleeping bags have different styles, such as envelope, gourd, cocoon -like, vest, etc.At different ages of the baby, you should choose different styles of Sleeping bags for them.

Newborns within eight months can use gourd -type and envelope Sleeping bags.After the baby is one year old, sleeping is the most unstoppable. You can choose Sleeping bags such as vests and envelopes. At this time, the baby can understand the teaching of the parent, which will better cooperate with the parents to use Sleeping bags and quilts.

Bags are usually referred to as uniformity of parcel products used by newborns and children, and ordinary Bags are default to contain a Belt.The bag is mainly used to keep warm. When used, the baby and bag must be tightly wrapped.When the baby goes out, he has a bag, blocking the wind, covering rain, and Sun protection.

Which of Sleeping bags and hugs is more practical?In fact, Sleeping bags and quilts are to prepare for the baby's warmth, but their scope and functions are different, so they cannot simply compare them. Parents should choose the most suitable baby product according to the needs of the baby, or both buy both, In order to meet the needs of babies at different times.

In short, both Sleeping bags and Bags are practical. Parents are ready to prepare. It would be better for babies to go out for the baby with a quilt. When the baby sleeps at night, if you are worried that your baby can get cold, you can use Sleeping bags.

What are the categories of GPS navigator

Classification by the purpose of the receiver

1.navigation receiver

This type of receiver is mainly used for navigation of the motion carrier, which can give the position and speed of the carrier in real time.This type of receiver generally uses C/A code pseudo -distance measurement. The real -time positioning accuracy of the single point is low, generally 10m, and the SA affects 100m.This type of receiver is cheap and widely used.Depending on the application field, such receivers can be further divided into:

car type -for vehicle navigation positioning;

navigation type -for Ship navigation positioning;

Aviation type -for aircraft navigation positioning.

Due to the fast Running speed of the aircraft, the receiver used on aviation requires to adapt to high -speed exercise.

Starry type -for navigation positioning for satellites.Because the speed of satellites is as high as 7km/s, the requirements for receiving machines are higher.

2.Ground -type receiver

The ground -type receiver is mainly used for precision land measurement and precision engineering measurement.This type of instrument mainly uses carrier phase observation values for relative positioning, with high positioning accuracy.The structure of the instrument is complicated and the price is more expensive.

3.Time -type receiver

This type of receiver mainly uses the high -precision time standard provided by the GPS satellite to be awarded, and it is often used in the time of time in the observatory and radio communication.

Classified by the carrier frequency of the receiver

Single -frequency receiver

Single -frequency receiver can only receive the L1 carrier signal, and the carrier phase observation value can be determined.Because the effect of the ionization layer delay cannot be effectively eliminated, a single -frequency receiver is only applicable to the precision positioning of the short -based line (& lt; 15km).

Dual -frequency receiver

The dual -frequency receiver can receive L1 and L2 carrier signals at the same time.The use of dual -frequency delay on the ionization layer can eliminate the effects of ionizing layers on the delay of electromagnetic wave signals. Therefore, dual -frequency receiver can be used for precision positioning of thousands of kilometers long.

Classified by the number of channel channels

The GPS receiving function also receives the signals of multiple GPS satellites at the same time. In order to separate the signal of different satellites received to achieve the tracking, processing and measurement of satellite signals, devices with such functions are called antenna signal channels.The types of channels that the receiver can be divided into: multi -channel receiver; sequential channel receiver; multi -channel multi -purpose channel receiver.

Classified by the working principle of the receiver

Code -related receiver

Code -related receiver uses code -related technologies to obtain pseudo -distance observation values.

Square receiver

The Square receiver uses the Square technology of the carrier signal to remove the adjustment signal to restore the complete carrier signal. The phase difference between the carrier signal generated in the receiving machine through the phase meter is determined by the phase difference between the carrier signal generated in the receiverEssence

Hybrid receiver

This instrument is a comprehensive advantage of the above two receiving machines. It can obtain the code phase pseudo distance or the carrier phase observation value.

Interference receiver

This receiver uses the GPS satellite as a radio power source. The interference measurement method is used to determine the distance between the two measuring stations.

GPS navigator is classified according to use

1As well asnavigation receiver

This type of receiver is mainly used for navigation of the motion carrier, which can give the position and speed of the carrier in real time.This type of receiver is generally adoptedC/ACode pseudo -distance measurement, a single point of real -time positioning accuracy is low, generally10M,haveSAThe influence is100MEssenceThis type of receiver is cheap and widely used.Depending on the application field, such receivers can be further divided into:

car type -for vehicle navigation positioning;

navigation type -for Ship navigation positioning;

Aviation type -for aircraft navigation positioning.Due to the fast Running speed of the aircraft, the receiver used on aviation requires to adapt to high -speed exercise.

Starry type -for navigation positioning for satellites.Due to the high speed of satellites7km/sThe above, so the requirements for receiving machines are higher.

2. Destiny receiver machine

The ground -type receiver is mainly used for precision land measurement and precision engineering measurement.This type of instrument mainly uses carrier phase observation values for relative positioning, with high positioning accuracy.The structure of the instrument is complicated and the price is more expensive.

3. Time -type receiver

This type of receiver is mainly usedGPSThe high -precision time standard provided by satellites is often used in the time of time in the Observatory and radio communication.

Classified by the carrier frequency of the receiver

1. Single -frequency receiver

Single -frequency receiver can only receiveL1Carrier signal, determine the observation value of the carrier phase.Because the effect of the ionization layer cannot be effectively eliminated, the single -frequency receiver is only applicable to the short -based line (& lt; 15km) Precision positioning.

1. Dual -frequency receiver

Dual -frequency receiver can be received at the same timeL1,,L2Carrier signal.The use of dual -frequency delay on the ionization layer can eliminate the effects of ionizing layers on the delay of electromagnetic wave signals. Therefore, dual -frequency receiver can be used for precision positioning of thousands of kilometers long.

Classified by the number of channel channels

GPSReceive functions at the same timeGPSSatellite signals, in order to separate the signals of different satellites received to achieve the tracking, processing and measurement of satellite signals. Meters with such functions are called antenna signal channels.The types of channels that are received according to the receiver can be divided into:

Multi -channel receiver

Order channel receiver

Multi -way multi -use channel receiver

Classified by the working principle of the receiver

Code -related receiver

Code -related receiver uses code -related technologies to obtain pseudo -distance observation values.

Square receiver

The Square receiver uses the Square technology of the carrier signal to remove the adjustment signal,,To restore the complete carrier signal, the phase difference between the carrier signal generated in the receiving machine through the phase meter is determined to determine the pseudo -distance observation value.

Hybrid receiver

This instrument is a comprehensive advantage of the above two receiving machines. It can obtain the code phase pseudo distance or the carrier phase observation value.

Interference receiver

This kind of receiver isGPSAs a radio source, the satellite uses the interference measurement method to determine the distance between the two stations.

go through20The practice of the rest of the year proves,GPSThe system is a high -precision, all -weather and global radio navigation, positioning and timing multi -functional system.GPSTechnology has developed into an international high -tech industry with multi -field, multi -mode, multi -purpose, and multi -model.

MeasuringGPS

The ground -type receiver is mainly used for precision land measurement and precision engineering measurement.This type of instrument mainly uses carrier phase observation values for relative positioning, with high positioning accuracy.The structure of the instrument is complicated and the price is more expensive.According to the use of use and accuracy, it is also divided into static (single -frequency) receiver and dynamic (dual -frequency) receiver.RTKEssence

carGPS

When it is made through hardware and softwareGPSWhen the positioning terminal is used for vehicle positioning, it is called a carGPS,However, the positioning alone is not good, and this positioning information must be passed to the alarm center or on the carGPSWith the holder, we call it a third party.soGPSThe positioning system also containsGSMNetwork Communication (mobile phone communication), passGSMThe network sends satellite positioning information to a third party by SMS.Interpret SMS with a microcomputer and display the location of the vehicle on the electronic map.This realizes the carGPSposition.At the same time, install the corresponding detection sensor on the car, and use the carGPSPositioningGSMThe network communication function can also send the anti -theft alarm information to a third party, or send this alarm phone and SMS directly to the owner's mobile phone, complete the car to complete the carGPSanti -theft alarm.It can be seen here that the carGPSPositioningGSMThe network part is actually a smartphone that can communicate with third parties. You can also seize the vehicle by the driver, and the driver is sent to the third party.So the carGPSPositioning is positioning, anti -theft, and anti -robbery.

Similar carGPS

Similar carGPSTerminals include positioning mobile phones, personal positioners, etc.GPSSatellite positioning is due to the third -party positioning service, so it is necessary/ /Annual service fee.

All currentGPSThere is no navigation function for positioning the terminal.Because the hardware and software need to be increased, the cost is increased.

GPSEarly warning device

GPSThe early warning device is passedGPSSatelliteGPSSet the coordinates in the early warning device to complete, such as encountering an electronic eye, and then set up a coordinate directly below the electronic eye through the relevant device.Before300Early warning will start around Mi, telling the owner that there is an electronic eye test in front of the owner, and it cannot be drove over speed, which plays a warning role.Such accuracy is related to the amount of data points, mainly to achieve the use of satellite positioning.