1. Do you want to wear glasses on myopia ride?

Many friends are myopia, and they usually wear glasses, but if they are riding ordinary glasses, they have been riding for a long time, and they encounter the weather with bright or strong winds. The vision is prone to fatigue.I hope to wear ride glasses, so can myopia wears ride glasses?

The answer is yes. The riders of myopia can also bring Cycling glasses. Many Cycling glasses are equipped with myopia frame. Although the comfort is reduced, it can also solve the problem. If necessary, you can customize it by yourself.myopia version of Cycling glasses.

Some myopia friends also want to wear close -vision glasses to cycling, but it is not recommended, because it will be heavy when Myopia glasses are worn, and it will be uncomfortable to ride on the bridge of the nose. In addition, the frame of the frame will be small.Therefore, it is better to wear Cycling glasses.

Second, myopia Riding glasses solution Daquan

Riding glasses are one of the essential equipment riding, which can help block wind and sand, ultraviolet rays, but for myopia riders, choosing Cycling glasses is more troublesome. Here is how to wear myopia to wear Cycling glasses:

1. Double -layer Cycling glasses

That is, adding a close -up mirror frame to ordinary Cycling glasses. Many Riding glasses have this design, but this kind of glasses will also be worse.And because the myopia is close to the eyes, the degree and pupil distance need to be adjusted to a certain amount.

2. Customized Cycling glasses

Go to the relevant Cycling equipment store to customize the dedicated myopia Riding glasses, as if with glasses, after optometry or providing personal myopia, astigmatism, etc.glasses, but the price will be higher, it will be more troublesome if the myopia is deepened.

3. Wear Contact lenses

The combination of contact lens riding wind mirrors is relatively simple. Many friends of myopia rider will do this, but some riders do not like to wear Contact lenses.Another disadvantage to wear Contact lenses is that there will be some problems with dry eyes and eyes when riding for a long time.

4. Wind mirror integration helmet

The cylinder directly wore Myopia glasses, and then wears a cycling helmet. There will be a wind mirror on the riding helmet that can be used as Riding glasses. This method is simple to operate and the price is more affordable.However, the wind lens helmet that supports ordinary glasses needs to be found by itself, and it will be hot if it is riding in summer.

1. What types of skiing clothes

The types of Ski clothing can be divided into competition and tourism clothes. Competitive clothes are designed according to the characteristics of competition items, focusing on the improvement of sports performance.Tourism clothes are mainly warm, beautiful, comfortable, and practical.In addition, there are four types of single -board split, double -board, double -board split, and tights according to the style.

1. Single board splitting:Generally, a single -layer design, which increases the warm layer in front, the back layer is breathable, and the clothes are hypertrophy.

2. Double -board conjoined body:The benefits of traditional ski clothes are not to let the clothes be snowed in the clothes, but the conjoined design, but the movement is inconvenient, it has been eliminated, it is almost sold very little, and the body has been replaced.

3. Double board split body:It contains cotton or other warm layers, similar to the design of mountain jackets and beautiful styles.

4. tights:This is generally wearing professional competitions, with a special warmth layer.

Second, is the one -sided skiing suit, okay?

1. The advantage of the conjoined skiing clothing is that the Ski can make snow in the clothes even during the skiing process.

2. The conjoined design can effectively prevent the cold wind from being poured into the gap between the jacket and the pants, so that the waist is cold.

3. Ski athletes wearing conjoined Ski suits can also help improve skiing results.

4. However, there is also a very obvious disadvantage of the conjoined skiwear, that is, it is inconvenient to wear and take off, especially for children. If you want to go to the toilet, take off the Ski board, fixed device, and take off your shoes before you can take off the one -piece skiwear.The whole process is very cumbersome.

3. precautions for wearing split ski clothes

1. The split Ski jacket is convenient to wear, but the pants must be high -waisted when choosing, and it is best to have a strap and a soft Belt.The top must be loose. You must choose the middle waist and have a Belt or drawn to prevent the snow from entering the skiwear from the waist after the taxi falls.After straightening your arms, the sleeves should not be tightly tight, rather than long, because the upper limbs are in a comprehensive movement during the skiing process, especially for beginners.

2. When choosing a split skiing suit, you cannot choose a clothing that is too small or tightly wrapped in the body (except for professional competition clothes), which will limit the taxi action when you do nt choose.The top of the top should be loose. The length of the sleeves should be slightly longer than the wrist as the standard.The neckline should be open to the upright high -neck to prevent the entry of cold air.

3. The length of the split Ski jacket should be based on the length of the person to the horn of the pants to the ankle.There is a double -layer structure under the leggings. Among them, the inner layer is tightly closed with non -slip rubber, which can be tightly stretched on the Ski boots to effectively prevent snow in the outer layer.Boots bump each other and cause damage to the outer layer.

4. If you are worried that the split Ski Service will be easy to get into the snow, you can pair with a elastic long -cotton knee -clear woven with a clear cotton cotton.

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1. Positioning principle of Beidou system

The 35 satellites run around the earth at a height of more than 20,000 kilometers from the ground, surrounding the earth with a fixed cycle, so that at any time, any more than 4 satellites can be observed at any point on the ground.

Because the position of the satellite is accurate, in the observation of satellites, 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 observation point of the observation point.Location (x, y, z).Considering the error between the clock of the satellite and the receiver clock, there are actually 4 unknown, the difference between X, Y, Z, and clocks, so the 4th satellite needs to be introduced to form 4 squares for solving, 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.

The concept of "arrival time difference" (delay) is implemented: the accurate position of each satellite and the navigation information generated by the continuously sent atomic clock generated on the star of the star to obtain the time difference from the satellite to the receiver.

The satellite sends a radio signal with time and location information in the air for receiving the receiver.Due to the distance factor of the transmission, the time when the receiving machine receives the signal is delayed than the moment when the signal sends the signal, it is usually called a delay. Therefore, the distance can be determined by the delay.The satellite and receiving machine generate the same pseudo -random code at the same time. Once the two yards achieve time synchronization, the receiver can determine the delay; take the delay on the speed of light, and get the distance.

The computer and navigation information generators on each satellite understand their orbit position and system time very accurately, while the global monitoring station network maintains the position and system time of the satellite continuously tracking the satellite.Together with the main control station on the ground, with its operation control section, at least once a day, it is injected into the correction data of each satellite.Injecting data include: determination of the orbit position of each satellite in the constellation and the correction of the star clock.These correction data are calculated on the basis of complex models and can be maintained within a few weeks.

Satellite navigation system time is maintained by the pupae of the atomic clock on each satellite.Within a few seconds of NATO of these star clocks to the world coordination (UTC), UTC is maintained by the "main clock" of the US Navy's viewing table. The stability of each main clock is several 10^-13 seconds.The satellites used two frequency bands and two frequency bands in the early days. Later, it gradually changed to more frequent bands.Generally, within any designated time, only one frequency sign is working on each satellite.

Satellite navigation principle: The distance between satellite and users is based on the difference between the launch time of satellite signals and the time to reach the receiver, called pseudo -distance.In order to calculate the user's three -dimensional position and the bell deviation of the receiver, the pseudo -distance measurement requires that at least the signals from 4 satellites are received.

Due to the errors of satellite Running track and satellite clock, the effects of atmosphere on the signal on the flow layer and ionization layer on the signal, so that the positioning accuracy of civilian use is only tens of meters.In order to improve the positioning accuracy, the differential positioning technology (such as DGPS, DGNSS) is generally adopted, and the ground ground reference station (differential platform) is established for satellite observation., And released to the outside world.After 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 of differential positioning technology can be improved to the rice level.

Second, system function

(1) Four features

Shrology communication: Beidou system user terminal has two-way message communication functions, and users can transmit 40-60 Chinese characters at a time.It can reach information with 120 Chinese characters at a time.It has important application value in ocean navigation.

Precision time: Beidou system has a precision time-seeking function, which can provide users with 20ns-100ns time synchronization accuracy.

Positioning accuracy: horizontal accuracy of 100 meters (1S), 20 meters (similar to differential status) after the establishment of a school station.Working frequency: 2491.75MHz.

The largest number of users accommodated by the system: 540,000 households/h.

(2) military function

The military functions of the "Beidou" satellite navigation positioning system are similar to GPS, such as: positioning navigation of motion targets; the rapid positioning of the launch position of the weapon vehicle launch of the reaction time;

This function is used in military, which means that the positioning of troops at all Levels can be actively positioned, which means that once the troops at all Levels are equipped with the "Beidou" satellite navigation positioning system, in addition to their own positioning navigation, the senior headquarters can also pass at any time through at any time.The "Beidou" system masters the position of the troops and conveys the relevant commands, which is quite helpful for the implementation of the task.In other words, the execution of the "Beidou" satellite navigation positioning system can be used to command and control and the battlefield management.

(3) Civil function

1. Personal location service

When you enter a place where you are not familiar with, you can use a mobile phone or car satellite navigation device equipped with Beidou satellite navigation to receive chips to find the route you want to take.

2. Meteorological application

The development of Beidou navigation satellite weather can promote China's weather analysis and numerical weather forecast, climate change monitoring and prediction, and improve the level of spatial weather early warning business, and improve China's ability to prevent disaster prevention and mitigation.

In addition, the meteorological application of the Beidou navigation satellite system has an important impact on promoting the innovation application and industrial expansion of Beidou navigation satellite.

3. Road traffic management

Satellite navigation will help slow down traffic blockage and improve road traffic management level.By installing a satellite navigation receiver and data transmitter on the vehicle, the location information of the vehicle can be automatically reposted to the central station within a few seconds.These location information can be used for road traffic management.

4. smart transportation of railway

Satellite navigation will promote the upgrading and transformation of traditional transportation methods.For example, in the field of railway transportation, by installing satellite navigation terminal equipment, it can greatly shorten the interval between the train, reduce transportation costs, and effectively improve transportation efficiency.In the future, the Beidou satellite navigation system will provide highly reliable, high -precision positioning, speed measurement, and timing services to promote the modernization of railway transportation and realize the transformation of traditional scheduling to intelligent transportation management.

5. Sea transportation and water transportation

Sea transport and water transportation are one of the most widely transported methods in the world and one of the earliest applications for satellite navigation.Most of the various types of vessels driving in the world's oceans and rivers and lakes are installed with satellite navigation terminal equipment to make sea and water transport more efficient and secure.Beidou satellite navigation systems will provide navigation positioning and safety guarantee for water sailing ships under any weather conditions.At the same time, the telecommunications function unique to the Beidou satellite navigation system will support the development of various new services.

6. Air transportation

When the aircraft landed at the airport, the most basic requirement is to ensure the safe distance between the aircraft.Using the advantages of accurate positioning and speed measurement of satellite navigation, you can determine the instantaneous position of the aircraft in real time, effectively reduce the safe distance between the aircraft, and even in the case of heavy fog weather, it can achieve automatic blind drops, which greatly improves flight safety and airport operations.efficiency.By combining the effective combination of the Beidou satellite navigation system with the other systems, more security guarantees will be provided for aviation transportation.

7. Emergency rescue

Satellite navigation has been widely used in searches and rescue in the sparse areas of deserts, mountains, oceans, and other people.When major disasters such as earthquakes and floods, the key to the success of rescue is to understand the disaster in a timely manner and reach the rescue location quickly.In addition to the navigation positioning of the Beidou satellite navigation system, it also has a short newspaper communication function. Through satellite navigation terminal equipment, it can report the location and disaster situation in time to effectively shorten the time of rescue search, increase the time limit for rescue and disaster relief, and greatly reduce the loss of people's lives and property.

8. Guide to grazing

In October 2014, the Beidou system began to pilot the construction of the Beidou satellite grazing informatization guidance system in the pastoral area of Qinghai Province. It mainly relies on the automatic station of the data collection of Beidou smart terminals and pasture for the belligence of the pasture area to achieve data information transmission.The dynamic monitoring of the pasta, cattle, and cattle and sheep through Beidou ground stations and Beidou star groups and relay treated.In the summer of 2015, herders in pilot pastoral areas can use special Beidou smart terminal devices to guide grazing.

Disclaimer: The above method stems from the index of the program system or the sharing of netizens. It is for your reference only and does not represent the research perspective of this website. It proves that it is valid. Please pay attention to the authenticity and authority of the source of the content of the content.Apply to delete & gt; & gt; error correction & gt; & gt;

What to prepare for pregnant women when they go out

1. Physical examination

Before traveling, pregnant women should go to the Hospital for a comprehensive physical examination to understand their physical condition, and ensure that there is no hidden health hazard for going out.In particular, consult a doctor's suggestion on pregnancy travel to see if it is suitable for the current physical condition.

2. Planning itinerary:

Choose the right travel time and method.Generally speaking, the second trimester (4-6 months of pregnancy) is a safer travel period, because the discomfort in the early pregnancy has disappeared at this time, and the physical heavy body in the third trimester has not yet begun.Avoid going far 3 months and two months before pregnancy to reduce the risk of abortion and premature birth.Formulate a detailed itinerary, including the selection of transportation and the inspection of accommodation conditions to ensure the comfort and safety of the journey.

3. Prepare for necessary items

Carry medical documents such as pregnant women's health manuals and inspection reports to prepare from time to time.Prepare some commonly used medicines, such as motion sickness drugs (obeyed by doctors), creative stickers, iodine, etc., as well as anti -vomiting drugs dedicated to pregnant women or alleviating uncomfortable drugs (required doctors).Bring enough drinking water and healthy snacks, such as nuts, dried fruits, etc. to maintain energy and water.

Listing list of pregnant women's travel items

1. Medical and health care items

1. Medical records during pregnancy: Including the checklist, the health files of pregnant women, etc., ensure the safety and convenience during the journey.

2. Commonly used drugs: such as vitamins, calcium tablets, motion sickness drugs (in accordance with doctors), special antivirus for pregnant women or alleviating uncomfortable drugs (required doctors), band -aid, iodine, cotton swabs, gauze, etc.

Second, convenience items

1. Pregnant women's underwear and comfortable clothing: Buy loose and comfortable pregnant women underwear and clothing to ensure the comfort during the journey.

2. Lumbar pillow: It is used to provide waist support during the travel process to reduce waist pressure.

3. Pregnant woman Belt: A good pregnant woman Belt can provide abdominal support and reduce the burden on the abdominal muscles.

4. Water bottle: Carry a heating bottle with you, you can pour a cup of warm water at any time for easy drinking.

5. Anti -radiation uniforms: If there will be radiation during travel, it is recommended to wear special radiation protection uniforms.

6. Comfortable shoes: Choose comfortable shoes to avoid feet discomfort during the journey.

3. Personal hygiene supplies

1. Skin care products: Select some Skin care products for pregnant women to keep the Skin moist and flexible.

2. Washing supplies: Bring a toothbrush, facial cleanser, shampoo and other washing products for pregnant women.

3. Paper towels and wet towels: carry some paper towels and wet towels with you to facilitate the emergence.

4, sunscreen: Choose sunscreen for suitable pregnant women to protect the Skin from ultraviolet damage.

3. Other items

1. kettle/insulation cup: Mainly replenish moisture.

2. Healthy snacks: such as nuts, dried fruits, whole Wheat biscuits, etc., to avoid high sugar and high -salt food.

3, sunscreen/Sunglasses: protect the eyes and Skin from ultraviolet damage.

4. Entertainment equipment: such as books, tablets, headphones, etc. to pass the time.

5. mask: Wear it during the epidemic or dense places to protect yourself and others.

precautions for travel for pregnant women

1. Choose a stable and comfortable transportation to avoid long -distance buses and trains with larger bumps or long time.

2. During meals, choose a clean and hygienic restaurant to avoid eating cold, greasy or cooked foods to prevent food poisoning or gastrointestinal discomfort.

3. Do not overwork during the journey, do not arrange too compact itinerary, arrange more stays for rest.No matter what kind of transportation is on, you should pay attention to maintaining appropriate activities, such as standing up every 15 minutes and walking around to promote blood circulation.

4. Pregnant women should avoid traveling to areas where infectious diseases are popular, so as not to cause adverse effects on the fetus.

5. It is best to have friends or family members to accompany pregnant women in order to get timely help and care in emergency situations.

6. Pregnant women should pay close attention to their physical conditions during the journey. Once any symptoms such as abdominal pain and bleeding should be immediately seek medical treatment.

Common faults and solutions of GPS navigation instruments

1. The machine is not turned on

(1) Do not use it for a long time, do not turn on.It may be that the battery is written and protected. The connection is connected to the charger. You can turn on it. If you still can't turn on the power, please shorten the battery bipolar!

(2) The machine is not turned on (non -artificially damaged).At the beginning, you can try to press the "reset key" to revitalize the machine. If it is not good, it is likely that the machine drops the program, and the other is the key failure of the opening.

2. Click on the screen with sound but the function is useless

When the machine is used, the touch screen is not responded or inaccurate. Try to calibrate. In addition, it is likely to be the quality of the touch screen. The lines are loose. This situation occurs in winter.Chip, this problem can only be solved by the manufacturer.

3. After booting, I have been staying in the system and cannot be included in the system

One is long time, chip aging, procedure lost, and heavy brushing program.One is human operating errors, brushing the master program, and the system program in the memory by mistake when the map is upgraded. You can only brush the corresponding system software. Do not blindly brush the machine system file.brick.

4. GPS navigation cannot receive satellite signals

(1) It is useless for a long time, which causes not to search for stars.First of all, enter the map to initialize GPS, or not to accept stars, it must be the GPS module loose fake welding.

(2) You cannot find a signal or a signal for a long time.Needless to say, the GPS antenna is aging and return to the factory.

5. GPS terminal can search for satellites but cannot locate

(1) In terms of software, the map upgrade port is not modified. The download port testing software is tested, or the map owner program is not configured correctly.Some machines need to use a special version map, and a special version must be equipped.Use the GPS star search emulator with the machine itself to determine whether the hardware problem is.

(2) In terms of hardware, the machine has been exposed to the sun for a long time or works at high temperature (the machine will generate heat when working, and it is quite hot for a long time) causes the machine, GPS module, antenna to accelerate the aging, or burn directly, resulting in not searching for search.The signal or only one or two stars.

6. GPS terminal cannot recognize the memory card

(1) Software: Based on the old machine before, it does not support SD cards of more than 2G. Everyone trys to patch a patch (the system is very small).

(2) Hardware: First determine whether there is a problem with the SD card, and then check whether the SD card slot has foreign bodies, and then consider whether the card slot is damaged.

7. How to flash the machine to update the machine system version

Many G friends, I want to toss the machine and refresh the system version. First of all, we must understand the machine scheme, motherboard model and parameters (enter the settings -system information), write system information by hand, or use hand to determine the system information, or to use the system information, orScreenshots, then contact dealers or manufacturers to update the software.If you are looking online, you must pay attention to whether it is consistent with the motherboard. Do not brush it randomly, otherwise you will change your bricks.

8.GPS screen reaction is slow

There are two types of screen reactions in general GPS: there will be two types of slow -screen reactions: there will be two types:

1. The screen is damaged by the sharp object.

2. Degrees of screen recognition.

Simple judgment and solution:

To identify the reason for the slow response of the screen, you can choose to enter the place name in your search destination.If the words in the handwritten box are always intermittent, it is difficult to be coherent, and even divided into multiple parts.Then the touch screen is likely to be damaged by sharp objects.Generally, this situation will only appear when it is more than half a year, and there is no solution.The key is the usual use and maintenance.When input, choose a handwriting pen with GPS, and try not to use the screen or toothpicks with sharp things for a long time as alternative with your fingertips.

9.The suction cup of GPS bracket is easy to loosen, and the back clip is easy to break

In the GPS accessories, the bracket is the most prone to problems, especially the suction cup and the back clip.Many car owners report that the quality of the bracket's suction cup is too poor, completely sticky, and the road conditions have fallen slightly; the back clips are also very easy to break, and it will break.

Simple judgment and solution:

In fact, the phenomenon of loosening the suction cup generally occurs after a period of use. When the circular glue part of the suction cup is entered due to the air, the gap is left out of the vacuum part.fall.Frequent paste and extraction can also reduce the attachment function of the suction cup.The owner can wipe the front windshield and navigation bracket suction cups to reduce the gap left in the vacuum part.If the loose time is too frequent, GPS brackets should be replaced to avoid hidden safety hazards.

The back clip is broken, which is more caused by human factors.The unfairly demolition method of the owner makes the back clip that is not sturdy more easily broken.When removing, pay more attention to the direction of the back clip. Unfortunately, you can really be broken. You can buy universal brackets for replacement.

10.GPS cannot use the vehicle power supply

Under normal circumstances, GPS's battery life is about 1-2 hours, so when long-distance driving, vehicle power is needed.However, some car owners found that the prompts are always not bright whenever they use the vehicle power supply.After the inspection, it was found that the fuse of the original cigarette heater was burned, so the external power supply could not be used.At this time, the owner often believes that the quality of the car power supply of the GPS is too poor, but after multiple replacement, the situation is still.

In fact, the reason for the unable to use the vehicle power supply by GPS is not exactly caused by the quality of the vehicle power supply. Some of the reasons are caused by the design of the cigarette lighter.

Simple judgment and solution:

The owner can first observe which interface of his GPS vehicle power supply belongs to which one shows the following figure. When the A -type plug is plugged out, the fuse will occur, while the B plug will not happen.The owner can replace the vehicle power supply of the B plug.

For car owners who use the car plugs using A interface, if you do not want to change the vehicle power supply, you can insert it after starting the car and before the fire off the fire to prevent instant high -voltage burning.If you think this method is troublesome, you can choose to make a simple transformation of the cigarette lighter in the car.The metal piece above the cigarette jack is flat (red standard), so that the GPS cannot use the vehicle power supply.

Disclaimer: The above content is derived from the provision of the program system index or the sharing of netizens. It is for your reference only and does not represent the research perspective of this website. Please pay attention to the authenticity and authority of the source of the content of the content.Apply to delete & gt; & gt; error correction & gt; & gt;