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　　The midsummer sunshine brings light and hope to more than 10,000 impoverished families in Huludao. Each photovoltaic power station will bring benefits to these poor families for at least 20 years.

　　In Jianchang County, north of Huludao City, several rocky mountains are covered with solar panels. Thousands of solar panels convert summer sunlight into strong electrical currents that feed it into the grid.

　　Jianchang County has 65 such spectacular solar panel arrays, known as village-level poverty alleviation power stations. The power generation panels placed in farmers' homes are called household photovoltaic power plants. All solar power stations youtube in the county can generate 1,000 kilowatt-hours of electricity per hour, and can generate more than 20 million yuan in revenue every year. The money will be used for poverty alleviation in Jianchang County and create employment opportunities for thousands of poor people.

　　Jianchang County, Huludao City takes advantage of the local natural advantage of long sunshine hours, and vigorously implements photovoltaic power generation poverty alleviation projects according to local conditions. In 2016, the distributed photovoltaic poverty alleviation power station project with a total installed capacity of 46 MW and covering 11,000 households was included in the list of the first batch of photovoltaic poverty alleviation projects in the country. Jianchang became the only county in the province to be approved for the project. After continuous efforts, the county has 6,030 household photovoltaic power stations, 65 village-level poverty alleviation power stations, and 93 village collective power stations in good operation, benefiting 13,721 poor households.

  

　　Optional energy storage portable power stations batteries include: sodium-sulfur batteries, flow batteries, lead-acid batteries, lithium iron phosphate batteries and power capacitor batteries. The introduction of various types of batteries is as follows:

　　(1) Sodium-sulfur battery

　　The sodium-sulfur battery works in a high temperature environment of 300 ° C. Its positive active material is liquid sulfur (S); the negative active material is liquid metal sodium (Na), and the middle is a porous ceramic separator. The main features of sodium-sulfur batteries are high energy density (3 times that of lead capacitor batteries), high charging efficiency (up to 80%), and longer cycle life than lead capacitor batteries. They are suitable for large-scale energy storage systems.

　　(2) Flow battery

　　The active material of the flow battery can be dissolved and distributed in two storage tanks. The solution flows through the flow battery, and reduction and oxidation reactions occur on the electrodes on both sides of the ion exchange membrane. This chemical reaction is reversible, so the ability to charge and discharge multiple times can be achieved. The energy storage capacity of this system is determined by the volume of electrolyte in the storage tank. There are many systems such as vanadium-bromine, all-vanadium, and sodium polysulfide/bromine for flow batteries.

　　(3) Lead-acid battery

　　The main feature of the lead-acid capacitor battery is that it uses dilute sulfuric acid as the electrolyte, and uses lead dioxide and velvet lead as the positive and negative electrodes of the battery, respectively. It has the advantages of low cost, mature technology, and large energy storage capacity. , Mainly used in power system backup capacity, frequency control, uninterruptible power system. However, its disadvantages are low storage energy density, few rechargeable and discharge times, and certain pollution in the manufacturing process.

　　(4) Lithium iron phosphate battery

　　Lithium-ion batteries have high working voltage and fast response speed, but are large in size and have average energy storage density. Lithium iron phosphate battery is a kind of lithium ion battery, and its cathode material is lithium iron cobalt phosphate LiFeCoPO4. Compared with traditional lithium cobalt oxide batteries, the energy density of iron batteries is 75% of that of lithium cobalt oxide batteries, but it has advantages in terms of manufacturing cost, safety performance, cycle life, and power output range.

　　(5) Nanotechnology power capacitor battery

　　Power capacitor battery is a new type of green and environmentally friendly energy storage power product that uses nanotechnology and combines physical capacitors and chemical power sources. The power capacitor battery stores energy at the interface between the electrode material and the electrolyte, and has an ultra-high capacitance value, great charge and discharge power, and very good low temperature performance.

  

　　Trying to choose the right bag to take with you on an important trip is always a tough decision. Over the years, the designs and materials used to make duffel bags have become increasingly complex, and choosing the right brand has become increasingly challenging.

　　ABS (acrylonitrile-butadiene-styrene) is another thermoplastic. ABS is lighter than polycarbonate, but not as durable. This makes ABS more common in cheaper luggage. While ABS isn't as durable, it's light, and it's a great option if you plan to carry hard luggage with you.

　　ABS and polycarbonate are the two most common types of plastics used to make suitcases and duffel bags. Polycarbonate is more flexible than ABS, and it also has greater impact resistance, making it an overall stronger suitcases abs .

　　On the other hand, ABS bags are generally less expensive than polycarbonate bags. They're also usually heavier, and they don't usually last long. Below, you will find more details about the different materials.

　　The question then is, which luggage material is the most durable? Today's hard-shell or hard-sided luggage is made of high-tech plastics, such as ABS and polycarbonate, that are lightweight and durable. ABS is lighter but polycarbonate is more durable. The most durable but also the heaviest is aluminum.

　　In this way, which one is better, ABS luggage or polycarbonate luggage?

　　ABS luggage is less expensive to manufacture and retail than polycarbonate. As such, it is popular in the market for cheap luggage where the price really reflects the quality. The mid-range luggage market uses other materials such as polycarbonate or aluminum for better durability and quality.

　　Soft luggage or hard luggage?

　　A hard case can better protect the contents of your luggage, especially if the bag is thrown around or smashed. Soft-sided pockets are easier to tuck into the overhead compartment and usually expand slightly to accommodate more stuff.

　　Making the right decision between ABS and polycarbonate luggage is up to you and your preferences. But with the above information, you can make the most informed decision. Have a great trip!

  

　　A portable air compressor pump is a vital piece of equipment drivers should carry in their vehicles. Driving on improperly inflated tires and with low tire pressure can result in poor fuel economy and uneven tire wear. Further, tires can lose air slowly, even without a puncture. If you do have a car tire puncture and fix it with a plug kit, you'll need a tire inflator to get back on the road again.

　　If you carry a portable tire inflator, you won't have to wait for roadside assistance to fix your flat tire or limp into your local dealer or service center. And when was the last time the air compressor at the gas station either a) worked, or b) you had quarters to actually start the damn thing portable tire inflator?

　　Most portable air compressors are powered by your car's 12-volt power source. You can also buy a cordless inflator, but may have to buy the battery and charging unit separately. Some heavy-duty air compressors attach directly to your car's battery because they require more juice than a cigarette lighter socket cant provide.

　　
  

　　how long do portable power stations last when not used

　　Generally, batteries have a low self-discharge rate-however, when the equipment is not in use, all portable power stations have a shelf life of approximately 3-6 months when not in use. This is why it is recommended that even if you do not use portable power stations, it is best to charge them fully, preferably every two months. And store the device in a cooler place (room temperature is fine, but don’t store it for a long time).

　　A typical portable power station can last anywhere from three hours to 13 hours on a fully charged battery. The lifespan depends on the battery's age, type of battery, size, and the number of electronics used with the power station.

　　It’s important to note that if you plan to use portable power stations for emergency purposes only, it is recommended to charge them through a wall socket, AC power socket or car plug after 3-6 months, because when you use it, it will Slowly exhausted.

　　
  

　　The size of a portable air purifier is smaller than a mobile phone and can be carried around, but can it really purify the air?

　　has a certain effect, but the specific effect is not strong. Some portable air purifiers are now popular on the market. Their size is less than the size of a mobile phone. One can imagine how small the internal parts are. The key to determining the efficiency of the air purifier is the speed of the fan. This portable air purifier The overall size of the air purifier is smaller than that of a mobile phone, and its air volume can be imagined. Its air purifier is several times smaller than a car air purifier. Such an air purifier is not very practical.

　　is not worth buying. The price of portable portable air purifier uv light on the market ranges from 200 to nearly 1,000 yuan, and everyone knows its purification effect. It does not have much purification effect when people are walking. It is better to spend ten dollars instead of buying a portable air purifier. Buy a good-looking mask for tens of dollars, and the effect of using a mask is much better than that of a portable air purifier.

　　This kind of product generates electrostatic negative ions through a negative ion generator, grabs the peculiar smell and harmful positive ions floating in the car, and then adsorbs it through the filter. The disadvantage of this method is that the filter needs to be replaced frequently, otherwise it will easily cause secondary pollution Even aggravating pollution.
  

　　The dust in the air covered all corners of the room; and these corners are beyond the reach of traditional cleaning tools, which is really an annoyance; in addition, there are pet hair, confetti on clothes, and shell scraps in the mini cordless car vacuum cleaner. , The food crumbs that my friends fell on the sofa, and the soot on the keyboard are all annoyances.

　　Cleaning up small paper scraps, nutshells and other garbage always wastes a lot of time. Household issues such as pet hair, water stains, and difficult to clean edges and corners have always plagued us. Nowadays, vacuum cleaners are enough for household cleaning, dry and wet. The three-purpose blowing function effectively sucks away solid, liquid, and other garbage, and the strong suction can quickly dry the wet ground, which can be done from the kitchen to the balcony.

　　With the advancement of science and technology, more and more technology products that liberate human hands and feet have also appeared. People use cars instead of walking, phones instead of flying pigeons to pass books, and even use robots to help us clean the floor. With so many convenient electronic products, we don’t even need to clean the ground in the future.

　　The principle of the vacuum cleaner is a process of sucking the air mixed with dirt into the dust bin through vacuum negative pressure, and then separating the clean air from the dust. There will be no dust and no secondary pollution.

　　The principle of the broom is that the big dirt is swept into the dustpan, and the fine dust is mixed into the air and distributed evenly, creating conditions for the production of pneumoconiosis. Hehe, although a bit alarmist, this is the main difference between a vacuum cleaner and a broom.
  

　　Other information related to tire pressure is also reflected on the tire, and the highest reference value of tire pressure has been marked on the sidewall. And this reference value has left enough margin to ensure safety.

　　It is a good habit to pay attention to tire pressure, but for car owners who do not have tire pressure monitoring, it may be difficult to develop this habit. How can I monitor and adjust the tire pressure of my car without running errands to the repair shop? The onboard air pump is obviously a weapon, and the huge air pump for cycle the repair shop can be easily carried with the car.

　　Excessively high air pressure will deform the tire. the tire will burst like a full balloon when it hits a rock or bumps.

　　Common sense tells us that the pressure inside the tire will expand due to heat, but many car owners deliberately lower the tire pressure for this purpose, which is obviously counterproductive. Too low air pressure will accelerate the squeezing and stretching of the tire sidewall, and the rubber will rapidly age under high-temperature catalysis, which will seriously damage the strength of the tire.

　　US Highway Traffic Administration data shows: when the tire pressure is higher than a quarter of the standard value, the probability of a traffic accident doubles; and when the tire pressure is lower than a quarter of the standard value, the probability of a traffic accident doubles.

　　Tire pressure has become a tangled problem in everyday cars. High is not good, low is not good, ordinary car tire pressure is between 2.5~2.7bar, but it is best to follow the manufacturer's specified value at the door frame. Generally speaking, the above value can be used as the lowest reference value for tire pressure.
  

　　Be aware that the tire pressure recommended by the manufacturer does not represent the best performance of the tire. For all-around driving, the manufacturer’s specifications may be ideal, but more air in the tires represents better fuel efficiency. In general, inflating your tires a bit more may make your driving more bumpy or uncomfortable, so please use it yourself.

　　Understand the myths about the “maximum air pressure” value in the owner’s manual or the driver’s side door. An often misunderstood concept is that the maximum tire pressure recommended by the manufacturer represents all the air pressure that the tire can withstand, after which the tire will burst or malfunction. In fact, this maximum tire pressure is the air pressure required by the tire at maximum load.

　　Although this may not be good for the tire, you can exceed the maximum pressure of the tire performance when you inflate, especially if the tire is new. Some sources even suggest that you can exceed the manufacturer's recommended air pressure limit several times when you inflate.

　　When your inflation exceeds the maximum air pressure limit, be prepared for possible malfunctions. If the tires are exposed to high air pressure, potholes during high-speed driving may cause a disaster.

　　If you are carrying heavy objects or sharing a car with others, you can add more air pressure to the rear tires. If your car has to carry heavy loads, especially for long-distance driving, don't be afraid to add more air pressure to the rear wheels, which can make up for the extra load of the car. When unloading heavy objects, remember to release some of the rear wheel air pressure to restore the standard air pressure specifications.

　　Check the tire pressure when the weather changes in seasons. Cold weather may reduce the air pressure, while hot weather will increase the air pressure. Therefore, it is very important to recheck the air pressure when the season changes.

　　Do not read the value on the tire pressure gauge with your eyes only. Don't be lazy. Sometimes it is difficult to tell the difference between 10 PSI and 20 PSI on the Locomotive Tire Pressure gauge. Moreover, the sidewalls of radial tires usually have a little bulge. If you inflate until the bulge disappears, you may have over-inflated severely beyond the point of pushing the tire's performance.
  

　　

　　The vegetable market hides one of the most solemn life rituals in the region.

　　From the hundreds of snow-white tuna waiting to be auctioned at Tokyo's Tsukiji Fish Market in the early morning, to the Chinese cabbage that Beijing citizens pull home in units of "10 catties" after the frosts fall each year, they are colorful and neatly stacked in the cabins from the Mekong River. The exotic scents intertwined from tropical fruits to Middle Eastern Bazari spices.

　　Look at how people in the vegetable market serve food, you can understand the temperament and aesthetics of a region.

　　The vegetable market carries the human touch of a community. Retired old people can find the gap between the two points of cooking and taking care of their children.

　　The busy hawkers at the stalls can have a little connection with the city where they have lived for more than ten years, even if they just watch a patron go from a teenager to middle age.

　　Where there is communication, talents are not atomized.

　　The vegetable market has insight into the laws of a city's healthy operation. If you didn't cycle around the vegetable market in Beijing's third ring road like the architect Sheng Qiang, you might not know the dependence between high-end industries and small businesses.

　　If you didn't let students and vegetable vendors work together like the director of Fei Art Museum, He Zhisen, you might not know that one of the keys to urban renewal lies in reshaping the relationship between people.

　　The historical changes witnessed by the vegetable market are magnificent. From the Silk Road that spans Europe and Asia to the "new route" that opens the door to the modern world, civilization exists where there is a market.

　　The inspiration given to the individual by the vegetable market is simple and direct. It allows you to reconstruct the connection with the land, but more importantly, when you are wondering whether to take a 1km detour for potatoes that are 50 cents cheaper than the supermarket in the vegetable market, You may get a not-so-bad hint while sighing: Eat well and live your life.