The weather forecast says that it will be cloudy and overcast during the day and night today, with a maximum temperature of 28 degrees Celsius and an easterly wind of less than three levels.

As the saying goes, as the time enters the early summer, people usher in the unique troubles of the coastal city, and it rains almost every day for three weeks, not the rainy season but not much worse.

On such a day, today's rainless weather is naturally precious, and even the golden sunlight that occasionally shines through the clouds to illuminate the earth is even brighter and more pleasant.

Although it is gratifying and bright, Tang Jiayi still pressed a wide white gauze hat on her head when she went out, not to protect her from the sun and sun, but to let people see the huge and bright flowers decorated on the brim of her hat. She wore a beige shirt with beautiful lace and a blue long skirt today, and a pink curved beam Kun car was moving elegantly under her feet in small black leather shoes.

This scene is like traveling through decades, like a famous lady in an idol drama of the Republic of China.

Well, at that time, bicycles were the same as soda ash matches and nails, they were all "foreign" characters, and imported goods were naturally only affordable by local tyrants from all walks of life. Therefore, the women who can ride bicycles are often young women with Western-style education, and they yearn for some fresh and beautiful things, and they also give the bicycle a youthful and romantic bright color.

Time is a sandpaper that consumes beauty, making it easy to grow old and making beauty decay, but time is also the best beautician in the world, because the distance in time is more powerful than the distance in space, and "distance produces beauty" is also applicable to time distance.

Therefore, when we stand in the new century and look back at decades or hundreds of years ago, it is difficult to form an overall impression from the scattered impressions obtained from books, newspapers and pictures, so all kinds of brain imagination and intentional whitewashing naturally come into play, so there are costume idol dramas including various "Qing court dramas", so there is the popularity of "Republic of China style".

In fact, "Republic of China Fan" and "Gege Opera" are both pseudo concepts, the real queen is very authoritative, and it will not be like in novels and TV series, which can only rely on Mama Rong's steel needle to produce deterrence, and the life of the masters of the Republic of China in history must not be as elegant as imagined by later generations of literary youth.

Although because of Atletico Madrid's own preferences, bees have basically not been involved in the development of the Qing court opera industry, mainly because they have been eaten up too late, but they are not lagging behind in the development and utilization of the Republic of China.

The relationship between the years makes the latter a more suitable subject for commercial development, after all, quail and green fruits are rich all over the world, and there is no shortage of modern products except for jujube pills.

However, in the early 20th century of the Republic of China, there was a flood of all kinds of foreign goods, such as cars, bicycles, telephones, gramophones, radios, electromechanical lights, fans, etc., which had already appeared at that time and had become the standard configuration of upper-class families. In this way, it is obviously profitable to specialize in the production of corresponding products with a retro appearance, and then sell them to literary and artistic Xiaoxin and the Republic of China control, and make their emotional money. Anyway, the related technologies are all big road goods, and the only trouble is to create a retro appearance according to the cat and the tiger, and the low cost of mold opening has always been a traditional advantage of bees.

Therefore, even if there are not many Republic of China dramas directly filmed by Bee, there are a lot of Republic of China dramas that they have mixed in, and the producers have obtained fewer and more exquisite slots, and sometimes there are props for implanting advertising benefits, and Bee has also promoted their reproduced "Republic of China style products", thus getting a considerable piece of cake in the niche market of Republic of China products.

And nostalgia or something, is completely a common disease of human beings, these products because of the strong "European and American blood", but also smoothly opened the export market, exported to overseas of course only sold far, sales are actually not much.

For example, the pony smart bicycle that Tang Jiayi is riding now should actually be regarded as a product of the Republic of China, because its appearance design does not use the popular road racing style, but uses the classic style of decades ago, which looks very retro and very literary, but it is the same route as the "permanent C" that has become a small fresh brand.

Of course, retro is more about borrowing an ancient leather, and it is naturally impossible to use the technology and craftsmanship of decades ago to produce a bicycle, or even the technology of more than ten years ago.

On the surface, it has a retro appearance, but in the details, the pony bike is full of high-tech flavor, the most conspicuous nature is the small dashboard in the middle of the handlebar, which is also the most unrequited place on this car, fortunately, through careful design, the car display and the car lights are wrapped in a silver glittering electroplating shell, and the overall style is not contrary to the harmony. On top of that, the rear wheels and frame of this car are also unique, the frame is equipped with wires and battery packs, and the rear wheel with built-in micro motors is superficially indistinguishable from that of a normal bicycle, but when it comes to uphill sections, the effortless performance will naturally make the rider remember it well.

Of course, the capacity of the frame battery pack cannot be very large because of the shape design and weight factors, so this bike is still a human-powered bike rather than a pure electric bike.

And this is exactly what Tang Jiayi likes most about this car, it looks like an ordinary bicycle on the surface, except for the classical shape, there is nothing abnormal, but the comfort after riding it will greatly exceed the imagination of others.

The rear-wheel motor recovers some of the kinetic energy when riding on flat sections and when braking and decelerating, recharges the frame battery pack, and when it comes to climbing a hill or pedaling hard to accelerate, the motor outputs kinetic energy to provide additional assistance to the rider.

In fact, this design is not the best choice, after all, the shift function of changing the gear ratio on the bicycle is more popular and mature, and almost every bicycle with a sports function must have a simple or complex shift mechanism. In contrast, the electric power scheme of pony bikes is more complex and expensive.

But who made the transmission not match the temperament of this retro bike?

There is no doubt that the "professional" and "sophisticated" image brought by the densely packed multi-layer gear blades of the transmission does not match the retro elegance of this car at all.

And having a battery pack has the advantage that it can be used as a power source for in-vehicle devices such as displays, front and rear lights, and rear sensors. With manpower generation, the car does not need to be charged every day and can still use various tall electronic functions, and can also be used as a large power bank when necessary to charge the mobile phone for emergency relief.

In addition to the beamless Kun bike that Tang Jiayi is riding now, Pony Company actually has a men's model with beams, which also focuses on elegant retro and does not particularly emphasize the sports style, but it is additionally equipped with a wheel display, which can be described as full of commotion when riding at night.

However, Atletico who was with her at the moment did not ride a men's bicycle, but he was pedaling a tricycle with the front of the carriage.

As for his passengers, it was none other than his four children, and the four little ones were each lying in a small cradle, and the four cradles were two high and two low in two rows and were fixed in the carriage, so that the little ones lying in the cradle could have the best view. Of course, the main thing is that the child is not afraid to lose the ...... in front

The family of six did not go far, but just circled in the bee garden, blowing the wind and basking in the sun. But at the speed of a snail crawling like they are now, it's not easy to get around the bee farm that is getting bigger and bigger.

Seeing the solar panels on the street lamp pole in front of her that had changed shape, Tang Jiayi remembered the conversation with her husband yesterday, raised her right hand and shook it, "Ma Cheap, the solar energy used in these street lamps is not self-produced, right?"

"Of course it's purchased, it's a fool not to buy it if it's so cheap!" said Atletico in a muffled voice.

Although he firmly believes that the development of Mahalcomb solar by imitating his own skin is definitely the best choice for cost and efficiency, he has been slapped twice by the market and reality.

Compared with the 6 million years of human evolution and more than 10,000 years of civilization history, it can be said that the sun can be bright for another 5 billion years, which can be said to be eternal, so people of insight have always believed that solar energy is an endless source of energy, and only by truly mastering solar energy technology can human civilization move towards the future.

However, it is a pity that although the amount of solar energy radiated to the earth is huge and endless, equivalent to burning 5 million tons of coal per second, because it is dispersed to half the world, the energy intensity received per unit area is not high, which seriously limits the efficiency of people's direct use of solar energy.

In fact, all kinds of energy sources currently used on the earth, except for nuclear energy, geothermal energy and tidal energy, the rest are essentially secondary or even tertiary conversion of solar energy. Coal, oil and natural gas are fossil fuels that are transformed from the corpses of ancient organisms millions of years ago, so they are also called fossil energy, and these energies are completely the wealth accumulated by the photosynthesis of countless plants over hundreds of millions of years. Wind and water energy comes from atmospheric circulation and ocean evaporation, both of which are also driven by solar energy.

These energy sources can actually be regarded as concentrated solar energy, although this concentration process also needs to pay a huge amount of time and space costs, fossil energy needs millions of years or even longer to generate, wind and hydropower need special terrain and latitude conditions to form, but because it is not a human group that "pays the bill", it can naturally be ignored, so the use of fossil fuels and water energy will become common, and in some places where the conditions are suitable for perennial wind, wind power generation is also profitable.

On the other hand, the technology of directly using solar energy has been progressing slowly.

While some of the fashionable electronic calculators and electronic meters are equipped with solar panels to make them solar calculators and solar meters, it is completely useless to install a small piece of solar cells in these two low-power electronic devices.

The solar cell is said to be a "battery", but it itself cannot store energy, and can only convert the light energy of a specific color and brightness on it into electrical energy, and if the external light is dim, it will be blinded, so similar equipment usually has a "spare" dry battery compartment, which is usually powered by dry batteries, and converted to solar power when the light is bright. The actual effect of the extra solar module is only to change the battery a few months later, and the battery life of these low-power devices is not a demand pain point at all.

Because the energy density of solar energy is very low, if you want to use it, you have to find a way to gather it, generally building a concentrating array, focusing a certain range of sunlight into a small area, and then placing energy conversion equipment on the focus to convert the light energy into other energy. It can be a concentrated light collector, using the heat at the focal point to heat a low-boiling liquid to produce high-pressure steam, thereby driving the steam engine to rotate and drive the generator to emit alternating current, or it can place a photovoltaic module at the focal point to directly use the photoelectric effect to convert the light energy into direct current, and then reverse it into alternating current and transmit it to the user.

These two conversion ideas are sometimes used in combination, using both the light and heat of sunlight, and sometimes the large solar panel array is laid directly on the site without the need for a concentrating array.

However, due to the cost, it was not cost-effective to build photovoltaic power generation systems on the ground, and they were only used in places where every gram of weight is precious and not suitable for conventional energy sources, such as satellites and space stations. So for a long time, only artificial satellites and space stations were equipped with large-area solar panels as standard, so that the "big wings" full of squares became the classic image of these two.

Although silicon is the second most abundant element in the earth's crust and one of the main components of soil, it is not easy to make tall silicon semiconductors from mud. Usually to manufacture high-purity silicon, high-purity quartz sand is required, and then after repeated purification to obtain polycrystalline silicon and higher purity monocrystalline silicon, the highest purity monocrystalline silicon is cut into wafers, which is used to manufacture chips such as CPUs.

In recent years, the rapid development of the solar photovoltaic industry, in addition to the reasons for the strong subsidies of various countries, the rapid development of the chip industry is also a big help, after all, polysilicon monocrystalline silicon is also an important raw material for the chip industry.

However, this is not the case for Atletico Madrid, whose Mahalcomb solar does not need to use silicon materials, which avoids the high pollution and high energy consumption of silicon purification, but also cannot enjoy the benefits brought by the progress of silicon purification technology.

Originally, the production cost of polysilicon panels was several times that of him, but the price of polysilicon panels has completely fallen in recent years, resulting in his cost advantage disappearing. In addition, the problem of mass production has not been solved, and as a result, even Bee Solar's own products have begun to use a large number of purchased components.

The street lamp pole with a sudden change in shape that Tang Jiayi saw is such a product. For mobile phone users, please visit http://m.piaotian.net