1. What light is suitable for the study?

1. table lamp

LED light sources in the study are relatively common.However, the bad LED light source may have a glare, and it will have a bad effect on the eyes. Therefore, when choosing the LED light source, you must be very careful.

2, ceiling lamp

The lighting of the study is not suitable for too large, nor is it suitable for too small.The main light can be used to use the ceiling light.

3, floor lamp

If you have a reading sofa chair in the study, you can place a floor lamp next to the sofa to provide local reading lighting.

4. Shooting Lights

Small shooting Lights can be installed in the bookcase, which can be decorated with bookcases, which is also convenient to find books.

2. How much watt is fit for the study?

Generally, the lamps of the study are almost about 40 watts.

3. The main points of design of the study

1. Add table lamps to the desk to strengthen reading lighting

If you want to sit in front of the desk, only indirect lighting is not enough. It is best to set up a table lamp at the corner of the table, or set up a Hanging lamp on the top of the table for key lighting.Especially when there are children in the home, in addition to the desk design must be adjusted with it, at the part of the local light source on the desk, it is best to choose an electronic table. It is best to try whether there will be flashing before purchasing.The situation occurred.

2. indirect light source to enhance the quiet atmosphere of the study

Indirect lighting can avoid the visual dazzling damage caused by direct light radiation, and it is a bit tired to turn the Lights on the light, and it will not want to be in this space for too long. Thinking is not easy to concentrate.Therefore, in designing the study, it is best to treat the indirect light source, such as the hidden light source around the ceiling, so that the calm atmosphere of the book can be set up.

3. Use rail Lights to direct bookcases to create visual scenes

Bookcases can also create interesting effects through light changes. For example, through the design of orbit Lights or embedded lamps, let the collection or items on the bookcase on the bookcase change the visual focus of the end view.

4. Aversion of light source direct computer screen

Because the computer screen itself will emit strong light, if the light of the space is too bright, it will reflect on the screen, the eyes are easy to be uncomfortable, and the words on the screen cannot be seen.But if the computer screen is only on, and the surroundings are darker, the vision is prone to fatigue.Correct practice: It is not allowed to make the brightness of the two from dark, and the brightness of the two should be similar. When reading the text in the computer for a long time, it is not easy to get fatigue.

5. Keeping natural light is important

The study room is suitable for reading. It is best to build the location of the study in the place where there is a natural light source. Even if it is shared with other spaces, such as the master bedroom or the corner of the living room, the location of the desk is best to be close to the window.In addition, the design of the study of the natural light source can be adjusted through the design of the shutters.

Most of the study decorations are elegant and quiet, giving people a quiet and calm feeling. Only in this way can it be more suitable for quiet reading.The design of the study of the study is the focus of the study in the study. Similarly, the lighting design in the bedroom, living room and other rooms also deserves our attention.

1. Christmas tree is a real tree or a fake tree

The Christmas tree was the earliest tree. Generally, natural pine and cedar trees were repaired as Christmas trees, which were covered with a variety of decorative objects and colored Lights. A big star was placed on the top of the tree, symbolizing that Dr. Oriental Dr. foundJesus' stars can only hang this star by the Lord of the family, and most people will not let you hang.

With the advancement of human civilization, it advocates love to protect trees and advocate environmental protection, so many people will not cut down true pine cypress trees and fir trees as Christmas trees, but to buy Christmas trees made of plastic.Environmental protection and buying the size and high degree according to your own room, it is also easy to move.In some large cities in China, the management department will also dispatch a large number of manpower on Christmas Day to check the major hotels and entertainment venues to see if there are any mosa and fir trees to make Christmas trees.Strict punishment.

Therefore, most of the Christmas trees used in Christmas are made by plastic products, and some are made of large bonsai trees. Of course, some merchants have grown pine cypress or fir trees themselves., But at present the domestic market is not optimistic. It is really not sold. The reason is obvious, and the price and practicality are very different.

2. The advantages and disadvantages of true Christmas trees

1. The advantages of real Christmas trees

(1) Protect tradition

The real Christmas tree provides a holiday and romantic environment, creating a symbol of family and traditions, and bringing nostalgic emotions to Christmas celebrations.The real Christmas tree has high value, creating a new holiday tradition.

(2) Natural fragrance

The real Christmas tree exudes the freshness and evergreen smell of pine needles.The fragrance of natural wood trees that just cut will bring happiness and enjoyment.

(3) They are easy to recycle

The real Christmas tree can be recycled, which has more environmental impacts than the artificial Christmas tree, and is more friendly to the environment.Thousands of trees recycling projects around the world.

(4) Environmental protection

The real Christmas tree is biodegradable because they are not made of plastic, so they will affect the environment.If this tree is not cut off, people can be planted again and use it in the coming year.Trees absorb carbon dioxide and other harmful greenhouse gases, and release fresh oxygen to the air.

(5) Unique

There are many varieties of real Christmas trees, so there are many unique choices.

(6) Maintain the economy

Real Christmas trees help maintain rural economy and provide employment opportunities.Supporting local industries is crucial, because each tree is planted for the annual harvest to ensure stable supply every year.

(7) Filter dust

The real Christmas tree is more helpful to filter the dust and smoke in the air than the fake Christmas tree, because they are planted on the ground and provide a comfortable habitat for wild animals.

2. The disadvantage of the real Christmas tree

(1) Continuous maintenance

Real trees need to be continuously maintained, such as watering and trimming to maintain their leaves and green state.These trees need to be watered every day to keep fresh without drying.

(2) Causes the fire

If the maintenance is not good, these trees may become fir, because if they do not keep moisture, they are more prone to fire.As the leaves and coniferous leaves are dry, if it is close to the heat source, the combination of heat and light may cause fire.

(3) Use toxic removal agent

In some cases, these trees use harmful toxic insecticides to help them grow, which may hurt humans.

(4)It won't last too long

If these trees are not well maintained, they will not last for a long time, and can only be retained in a limited time.According to the climate of a region, the real tree may not be long, but only a few weeks.

(5)Large maintenance cost

The real Christmas tree is very expensive, and it cost more money to buy a new Christmas tree every year.The money to buy a real tree is more than buying a fake tree every year.

(6)Cause allergies

These trees may affect and trigger people who are susceptible to allergies, leading to symptoms such as sneezing and runny nose.

(7)Difficult to clean up

cleaning a real Christmas tree may be difficult, because it may need to transport the transportation of garbage dumps and garbage collectors, and it is not easy to pack it as garbage.

1. Is it necessary to buy camping equipment?

Camping is a relatively hot way of vacation. Many people want to try, but for novices, is it necessary to buy a full set of camping equipment.It is relatively high. For novices, it is not recommended to buy it directly.

Novices have not been in contact with Camping, and I am not sure if I like Camping. Perhaps I feel very romantic and fresh when I see someone else Camping, so I want to try, but I am not sure if I would like it, so I want to Camping for the first time.For people, it is best to rent equipment or borrow equipment. After a few times of Camping, I still like it. At this time, consider buying a full set of camping equipment.

2. What are the places to consider when buying camping equipment

There are many camping equipment. When buying camping equipment, you need to comprehensively consider multiple aspects, including:

1. cost -effective

camping equipment is used outdoors, so its durability must be good. Good camping equipment is not only product quality, but also has approachable prices.

2. variety

There are many types of camping equipment. They can be divided into camps, shoes and clothing, Bags, diet, etc. When choosing, they can be classified and purchased at the camping equipment specialty store.

3. Professional

When buying camping equipment, you should choose a strong brand product. After all, camping equipment should be used outdoors or fields. If the professionalism is not strong and it is broken during Camping, it should not be called in the sky.Different camping equipment has certain differences in terms of professionalism. You can buy appropriate equipment according to your own conditions.

4. After -sales service

In the process of using camping equipment, there will be some problems, such as tents less accessories, and good camping equipment brands will provide high -quality after -sales service. If the Tent is missing, you dont have to worry about it.Specialty stores to buy accessories or repairs.

3. Do you want to buy a full set of Outdoor camping equipment?

uncertain.

A full set of camping equipment is still more complicated. In addition to basic tents, moisture -proof pads, Sleeping bags, etc., you must also prepare items such as kettles, water cups, tableware, flashlights, and mosquito solution. Generally speaking, it is mainly prepared according to needs.If possible, you can even move away a mini kitchen; if you have no requirements for Camping diet, you can also bring only basic camping equipment, mineral water and compressed biscuits.

[Principles of Affective Lights] What are the characteristics of the working principle of non -polar lamp?

What is the working principle of non -polar lamp

The inflexible lamp consists of three parts: high -frequency generator, coupling device, and Light bulb. The working principle is: coupling the energy of high -frequency electromagnetic field into the Light bulb by induction, so that the gas in the bulb is penetrated and forms a plasma.When the atom returns the base state, it radiates 254nm ultraviolet rays. The fluorescent powder in the Light bulb is excited by ultraviolet rays and emits visible light.

What are the characteristics of non -polar lamp

1. There are no filaments and electrodes in the bulb, and the product life is more than 60,000 hours.

2. High emitting efficiency, high -frequency non -polar lamp 80lm/w, low -frequency non -polar lamp 85LM/W.

3. The color rendering index is more than 80 or more, and the high -quality triple -based fluorescent powder is used.

4. Wide voltage work, the voltage can work normally at 185V-255V.

5. The frequency of high -frequency working frequency is 2.65MHz, the frequency of low frequency work is 230Hz, and there is no frequency flash effect on security

6. Light failure is small, and the light -pass maintenance rate can reach 80% after 20,000 hours

7, instant startup and then starting time is less than 0.5 seconds.

8. The starting temperature is low, the adaptation temperature range is large, minus 25 degrees, which can be started and work normally.

9. The power factor can be as high as 0.95.

10. Safety and reliability, green environmental protection, truly realized exemption and replacement.

High -frequency explosion -proof non -polar lamp composition

High -frequency generator

The high -frequency generator mainly includes an equivalent circuit of oscillator, filter, rectifier, switching device, matching network, driving coil and arc.It provides a high -frequency energy to stimulate and maintain gas discharge in the bulb.The high -frequency generator must have a very stable oscillating source and filter circuit. At the same time, it also has a high power factor and a low harmonic content.

All electronic components are installed in an aluminum power box, which has dual functions: shielding radio frequency interference and heat transmission to ensure the long life of the electronic device.The output frequency of high -frequency generator is 2.65MHz.

Each high -frequency generator must be combined with the same type lamp and coupler.If this basic criterion is violated, the components of the lamp will be destroyed or the electromagnetic interference will be generated.

Coupler

The coupling device is a device that combines energy from the high -frequency generator through the coil to the bulb.It consists of magnetic core, high temperature line, heat conduction rod, winding rack, base, transition parts and coaxial cables.

The role of magnetic core and high temperature line is to produce high -frequency magnetic fields.Through the heating rod in the middle, the excess thermal energy and discharge generated by the coil are transmitted to the outside through the aluminum base.There are two functions of the base: one is to ensure the connection between the bulb and the coupler; the other is to pass the excess heat to the heat sink. This heat sink must be part of the lamp.Connect with the Lights with the screws.

Connect the coupler to the high -frequency generator through the coaxial cable.The coaxial cable is connected to the coupler, and the high -frequency generator can be disassembled through the screw, the purpose is to facilitate the connection with the lamp.

The copper heating rod is extended to the center of the bulb to dissipate the iron oxygen magnetic core. There are two layers of high -temperature lines on the winding frame: one layer of conveying current, and the other layer is wrapped in the primary coil, but only one end is connected to the coil.In this way, the electric field of the second coil offsets the electric field generated by the first coil. In this way, the interference of the public mode terminal voltage is reduced to a lower value.

Light bulb

The bulb is mainly a glass bulb, which is mainly composed of bubbles, inner Tube, mercury, auxiliary mercury, etc. with a protective film and triple -color fluorescent powder, and the lamp head. It is filled with low -pressure mercury and inert buffer gases inside.

There is a glass inner Tube in the middle of the bulb, and the inner Tube is the coupling device.Through the plastic lamp head, the bulb is connected to the coupler.The installation of these two parts is generally only once, because it is a long life lamp. After installing it on the lamp, there is no need to disassemble.But sometimes (for example: at work or afterwards, when you need to change another color light), the light bulbs also need to be removed from the coupling device, but must be cautious.

There are two kinds of mercury in the Wuji fluorescent lamp. The main mercury is located in the short Tube at the bottom of the shell. Once the light is stable, it provides mercury atoms.The auxiliary mercury is placed on a close to the concave cavity, and the net is contacted with the heat discharge heat.Once the power mercury is quickly evaporated from the auxiliary mercury,In 10s, the lamp can reach 80%Light output.When the Lights were turned off, the net was cooled quickly, collecting most of the mercury atoms in the bulb to prepare to start the next start.The main mercury is guaranteed to maintain a stable light output within a wider temperature range.Auxiliary mercury ensures that the output is fast and stable.A protective film was coated in the middle of the fluorescent powder and the bubble shell to light upAfter 60,000 hours, the output of fluorescent powder maintained at about 70% of the beginning.

The use and installation requirements of light bulbs

1) light bulbs are not allowed to be used for a long time under the condition of radiator. Long -term use will cause shortened life, and it cannot work properly in severe cases;On the aluminum plate or other metal materials, 4 screws must be used. The screw must be made of electroplating or other corrosive materials; its role is to emit the calories accumulated in the Light bulb to ensure that the temperature of the Light bulb base is less than 90 degrees Celsius, soThe bulb is in a better temperature range;

3) The leader of the bulb is not allowed to be shortened or extended. It will destroy the resistance matching of high -frequency power and light bulbs, causing efficiency to decrease or damage;

4) The high -frequency power generator and the Light bulb must not be installed on the same metal heat sink, and it should be installed separately.If the conditions are not required to be installed in a metal body (such as street lights, pan -light Lights, etc.), under this condition, the distance between the high -frequency generator and the Light bulb should be pulled away.Status; if the lamp is closed, it is recommended to remove the upper cover of the high -frequency generator to benefit better heat dissipation;

5) When the coupler coaxial cable is connected to the output end of the high -frequency generator, be careful not to reconcile, and it shall not be extended, cut or damaged at will;

6) When the light bulbs are lit or just out, do not use your hand to touch the bulb directly, so as not to bring you discomfort.

In order to meet the requirements of the useless fluorescent lamp, please refer to the following terms to design, use and install the Wuji fluorescent lamp lamps.

lighting installation requirements

1) The fixed device of the bulb and the lamp must be firmly connected and tightly contact to ensure good heat dissipation;

2) Lights and high -frequency generators should be grounded according to the requirements when installation;

3) No matter what kind of lamps are used, the lamp shell must be ground.

1. Do you need to verify the gliding umbrella?

The gliding umbrella is a high -altitude movement with a certain danger. It is currently under the management of the China Aviation sports Association. There is a complete set of examination training specifications. There are specialized glide umbrella pilots certificates. So do you need to verify the glide umbrella?

Generally speaking, gliding umbrella flights are divided into two modes, one is the experience mode of professional coaches flying. This does not require my own research. The glide umbrella coach must have a relevant certificate; the other is a single flight mode.It is necessary to verify that after the special technical training is required, the certificate can be obtained after assessment.

Some friends do not intend to be a special coach to fly, but they just fly casually by themselves. They may think that it is not a big deal to take the test. However, it is generally recommended to take a certificate. OtherwiseNo relevant insurance.

2. How many Levels of gliding umbrella certificates are divided into Levels

Global umbrella Certificate, the full name is the gliding umbrella pilot level certificate, a total of five Levels:

1. Class A: Flying on the ground, the gliding umbrella flying on a hillside of not more than 100 meters. Students who complete the primary training course can get the "Grade A Certificate of Global umbrella Movement" issued by the Chinese Aviation sports Association.

2. Grade B: High glide, gliding umbrella at a sufficient height (more than 300 meters) and flying above a certain area, complete intermediate training courses and pass subject assessment, under the condition that the flight time and flight times can beApply for upgrade.

3. Class C: Dynamic gas currents soar, gliding umbrellas use the power of the hillside to rise to the air flow to make a short time flying.

4. Grade D: Hot air currents soaring, gliding umbrellas use the heat to rise to the air flow for air, which belongs to the medium and senior flight grade certificate.

5. E -Class: Long -distance flight, gliding umbrella using the upside off -road flight from the take -off point, requires the pilots to accumulate considerable flight experience and flight hours.flight.

3. What are the conditions for gliding umbrella test?

Global umbrella Pilot Certificate is divided into five Levels of ABCDE. The conditions for certificates of different Levels are also different:

1. Class A

(1) Over 16 years old, with culture above junior high school.

(2) Qualification certificate of the medical examination at the county level.

(3) Complete the theoretical teaching parts stipulated in the training outline.

(4) The flight time is not less than 5 flight days, and the number of flights is not less than 20 times.

2. Class B

(1) Have a Class A certificate.

(2) The flight time is not less than 20 flight days, and at least 40 flights.

3. C level

(1) Have a B -level certificate.

(2) The total number of flights is not less than 100 times, and the total time is not less than 20 hours.1 hour.

4. D level

(1) Have C -Class Certificate.

(2) The total flight time is more than 50 hours, and there are 3 times not less than 2 hours (there are record certificates in the official competition).

5. E -level

(1) Have a D -level certificate.

(2) There are at least 3 flights of more than 50 kilometers in different rising airflows (in the formal competition).

Global umbrella tests need to be taken in order, and at least half a year is needed for each level.