This crab is the leader, and after the leading crab is killed, the rest of the crabs run out into the sea.

Of course, Liu Feng felt that there was nothing, but the other fighters were surprised, although now you already had a lot of means to detect some energy fluctuations.

Infrared radiation is an electromagnetic wave with a wavelength between visible light and microwaves, which is imperceptible to the human eye. To detect the presence of this radiation and measure its intensity, it must be transformed into other physical quantities that can be perceived and measured. Generally speaking, any effect caused by infrared radiation on an object, as long as the effect is measurable and sensitive enough, can be used to measure the intensity of infrared radiation. Modern infrared detectors mainly use the infrared thermal effect and the photoelectric effect. Most of the output of these effects is electricity, or it can be converted into electricity by appropriate means.

If there is energy in the body of a strange beast, it will cause energy changes by itself, and light detection is generally used to detect strange beasts.

After the photon detector absorbs the photon, the electronic state of the photon itself changes, causing photon effects such as the internal photoelectric effect and the external photoelectric effect, and the number of photons absorbed can be measured from the magnitude of the photon effect.

Photoconductivity detector: also known as photoresistor. When a semiconductor absorbs a large enough amount of photons, some carriers in the body change from a bound state to a free state, thereby increasing the conductivity of the semiconductor, a phenomenon called the photoconductivity effect. Photoconductive detectors made by using the photoconductive effect are divided into:

There are two types: polycrystalline thin film type and monocrystalline type.

Photovoltaic detectors: mainly using p-

The photogenerated volt effect of the junction. Infrared photons with energies greater than the band gap excite electron-hole pairs in and near the junction region. The presence of the junction electric field causes the holes to enter the p-region and the electrons to enter

area, there is a potential difference between the two parts, and there is a voltage or current signal in the external circuit. Compared with the photoconductive detector, the background limit detection rate of the photovoltaic detector is 40% larger, and it does not need to add an external bias electric field and load resistance, does not consume power, and has a high impedance.

Light emission ~ emission - Schottky barrier detector: the metal and the semiconductor contact, the formation of the Schottky barrier, infrared photons through the Si layer by PtSi absorption, so that the electrons to obtain energy to jump to the Fermi level, leaving holes over the barrier into the Si substrate, the electrons of the PtSi layer are collected, to complete the infrared detection.

Quantum Well Detector (QWIP): Two semiconductor materials are artificially grown in thin layers to form a superlattice, and there is a band mutation at its interface, so that electrons and holes are confined to a low potential energy trap, so that the energy is quantized to form a quantum well. Infrared detectors can be used by using the principle of electron transitions at energy levels in quantum wells. Because only the polarization vector perpendicular to the growth surface of the superlattice plays a role in the incident radiation, the photon utilization rate is low. The concentration of ground state electrons in quantum wells is limited by doping, and the quantum efficiency is not high. Narrow response spectral region; Low temperature requirements.

There is also a kind of thermal detection, after the thermal detector absorbs infrared radiation, the temperature rises, which can make the detection material produce temperature difference electromotive force, resistivity change, spontaneous polarization intensity change, or gas volume and pressure change, etc., and the measured changes in these physical properties can determine the absorbed infrared radiation energy or power

However, this is a marine environment, so thermal detection is not very suitable here.

Of course, the base is already making exploration satellites, although the current scientific exploration satellites are already very advanced.

There are special marine remote sensing satellites, which can be used to achieve real-time, synchronous and continuous monitoring of large areas of the sea in an economical and convenient way, and it has been recognized as an important means of marine environmental monitoring. Compared with landsat and meteorological satellites, oceanographic satellites have the following characteristics:

The detection of marine environmental elements requires large-area, continuous, synchronous or quasi-simultaneous detection.

Oceanographic satellite visible light sensors require many and narrow wavelength bands, high sensitivity and signal-to-noise ratio (an order of magnitude higher than that of land satellites).

In order to match the change cycle of marine environmental elements, the ground coverage period of marine satellites is required to be 2~3 days, and the spatial resolution is 250~1000m.

Because the radiation intensity of the water body is weak, and in order to make the radiation intensity uniform and comparable, it is required that the place of the descending node of the water color satellite (launch ~ launch window) be selected around noon.

However, the accuracy has not been able to go deep, such as the most common weather forecasting satellites, the temperature data detected, is a large range, the resolution has been mentioned above, the minimum is 250 meters, even if it is a super beast, it is impossible to find.

And the super beast will not be at the surface depth of the ocean.

These fighters also carried infrared detection equipment with them, and drones also carried similar remote sensing detection, but none of them found the crab leader.

Liu Feng saw it at once.

In fact, Liu Feng found it very easily with the help of a watch.

Although this crab already has a high IQ, in front of Liu Feng's strength, it is scum.

The crab retreated, and the rest of the people continued their search.

Liu Feng frowned at the sea beast going ashore, this is definitely not a good thing, the sea beast went ashore, proving that there is not much food in the sea, not enough to eat, otherwise it will definitely not go ashore.

So what's changing at the bottom of the sea?

The changes in the ocean, I didn't know anything in my previous life, I just knew that my brother-in-law was a tyrant in Xigang, and the rest was gone.

Liu Feng could only ask his subordinates to set up more equipment.

In fact, in terms of human technology, it is more than enough to deal with mutant beasts, but there is a premise for this, that is, positive.

Mainly some exotic beasts appear in the places where people live.

Just like this island, it's easy to handle, with all kinds of cameras and sensors installed around.

Then set up an automatic alarm system, for example, the sensor can be the size of a button, and the pressure of this sensor can reach a certain level before sending a signal to the nearby receiving system.

When the receiving system is sent to the general control system, the control room naturally knows where it is?

These high-tech technologies do not appear in those small countries, and only superpowers can use them.

If the two superpowers in the world fight each other, they will really be able to see a lot of incredible things, and they will not be reluctant to do so like small countries and some missiles.

Once the superpowers fight, the missiles will at least be saturation attacks.

There are a lot of defensive measures set up around the island, because Liu Feng feels that the rest here can be used in the future.

The next day, Liu Feng continued to enter the water, and the shore also raised the vigilance, Liu Feng slowly dived, this time Liu Feng had a potion to restore mental power and energy, and the high-pressure trachea made a popping sound, which was the air compressed to the bottom of the sea.

Seven hundred and fifty meters! An hour later.

Two hours later 800 meters.

Nine hundred meters, one thousand meters.

At 1,100 meters, Liu Feng felt a little pressure, so he kept running his energy to restore his mental power.

At a position of 1,100 meters, after running for three hours, Liu Feng felt that it was almost there.

The body can no longer be strengthened, and after going ashore, although Liu Feng feels energetic, he always wants to doze off.

After eating and drinking, Liu Feng began to sleep.

"Boss!" I don't know how long it took for Liu Feng to wake up, he was woken up by hunger, and he just went out and saw that the commander here was a little anxious.

"Boss, sonar has found something unusual here." The Commander spoke, then pointed to a point.

Liu Feng glanced at it, it was more than eighty kilometers away from the coast, and it happened to be in the deepest trench.

Sonar can detect depths of more than 6,700 meters.

"No, it's nine thousand meters deep here, and this thing is levitating?" Liu Feng asked.

"I don't know." The commander shook his head in reply.

———————————————————————————————————————————————————————— the dividing line, wait half an hour to refresh, sorry "Boss, there's nothing special lately." The sentry replied.

Liu Feng nodded, and then went deep into the jungle, after entering the jungle, Liu Feng's heart was extremely comfortable, and he seemed to have found a familiar feeling in his previous life.

Liu Feng also has body armor on his body, which is specially made for super soldiers, wearing a camouflage color and a high-tech helmet.

The whole island is within communication range, and this is a tropical island, and as the altitude decreases, many poisonous insects begin to crawl out.

Liu Feng saw a spider coming out from under the dead leaves, and muttered in his heart: "This is definitely a nightmare for new students." ”

The most irritating thing in tropical places is all kinds of poisonous insects, and once these poisonous insects mutate, no one knows what kind of poison they will become.

Poisonous insects are divided into attributes, and after the poisonous insects mutate, their own energy is another attribute, even if it is the same poisonous insect, the mutated energy attributes are different, and the final result is not the same.

Moreover, the time of the onset of toxicity is very fast, and there is almost no time for treatment, so protective equipment is absolutely indispensable.

Those who can move freely in the jungle are also known as telekinesists.

In addition, there are many species in the jungle, which obscures the field of vision, and even if it is an auditory talent, it is difficult to distinguish carefully.

At altitudes of about 1,000 meters, species are more abundant, but the island of New Guinea is not very suitable for human habitation.

There are a lot of mountains here, and they are all faulted mountains, that is, there is a slope on one side and a steep cliff on the other.

The indigenous people of the island of New Guinea are also known as cannibals, and the indigenous people used to fight each other, killing each other and sucking the brain marrow.

There are also a lot of strange species on the island, similar to Australia, many marsupials, tree kangaroos, mountain mice, echidnas and so on.

New Guinea is impoverished by its rugged mountainous environment, where English is the official language.

However, there are also many Chinese here, and the population is small.

An island with a small population and many species, after two years, how many will be left?

Liu Feng saw a village, the ruins of the village to be exact, on both sides of a river.

The river is not big.

The village was overgrown with weeds, and Liu Feng scanned it with his mental power, and the house made of wood had decayed.

Below the village, it may have been a piece of farmland, but it has been abandoned, and this is a typical river valley area, a small ~ plain below the river valley.

Gently pushing away the grass, a human skull appeared on the ground, with a large hole in the skull.

As soon as his mind moved, Liu Feng found the bones of several more people, and then continued.

Coming out of the village and then towards the farmland, about 800 meters away, there were more than 30 human skulls, and these skulls had a hole in them.

"It's supposed to be a bird." Liu Feng carefully inspected it.

Inquest of bones, which also requires experience, Liu Feng continued to search, and found that people were fleeing, and there were about 150 people in the entire river valley.

Annihilation!

This is the power of the alien beasts, especially some flying alien beasts, just like those bats that are stupid, once they grow up, they are thousands of kilometers around, and they are the hunting range.

"I've been dead for about a year and a half." Liu Feng continued to inspect and saw the clothes on his body, and the watch worn by a person showed the date.

"It shouldn't have been big at the time." If you look closely at the hole in the skull, it is not very large.

Liu Feng looked around, there were no clues, Liu Feng turned on the communicator and said: "I am the lord, I am the lord, locate my location, a destroyed village was found here, the time of death was a year and a half ago, the flying beast is not large, there is a hole in the human skull, the size should be twice as large as the crow, please pay attention to all departments." ”

"I've received feedback from my lord, so be careful." The people at the base recorded detailed information.

The current soldiers will not descend below 2500 meters, this is an unexplored area, and the base will record the soldiers' findings.

"It should be the awakening of the alien beast and the urgent need for nutrition." Liu Feng muttered in his heart.

Then they leave, and these flying beasts will migrate to other places due to lack of food.

Liu Feng continued to walk along the river, deliberately walking in the open area, just to attract more alien beasts.

The high-threat beasts on the island will be cleared later, but only the low-threat beasts will be left here, and the poisonous poisonous insects are actually very simple.

Many poisons in the human world are lethal to these poisonous insects, but not to people or other things, just put poison on it.

Liu Feng is to translate the idea of the game into reality, this is the novice village, and then the surrounding islands are various copies, and the largest copy is in Australia.

After graduating from the novice village, you can do your own activities, and you can also go to other countries.

Liu Feng has a lot of combat experience, in fact, in the wild, guns are not suitable, guns are very powerful, but they will also attract other strange beasts.

Unless it is a telekinesis, it will be difficult for the awakened to survive if they are ambushed by alien beasts in the wild, and this situation will continue to be amplified with the increasing level of alien beasts.

High-level alien beasts are indispensable, and many potions and materials require high-level alien beasts.

South America, the islands of Southeast Asia, and Australia, these places are very suitable for high-level exotic beasts.

On the one hand, there are abundant resources around these islands, and those low-level alien beasts on the coastline are enough for the alien beasts to grow.

In addition, the appearance of super exotic beasts in these places is also conducive to the development of human beings.

Asia, Europe, North America, these places are dominated by humans.

Of course, some say the vastness of Siberia.

In fact, Siberia is not suitable for the survival of super exotic beasts, first of all, the high latitude makes the climate cold for most of the year, and food is scarce.