Chapter 858 The Value of Space Remote Sensing

"Yes... that's it."

Xiao Wenchang put down his cup and walked back to the curtain:

"Because our exploration unit has to constantly change work locations, we are unable to conduct particularly complex tests."

"Especially since the geological samples related to desert conditions are relatively stable in nature, we prefer to send more tests to Beijing."

As he spoke, he turned the PPT page again.

Above are several other physical and chemical data of samples from the two areas.

Of course, as Xiao Wenchang said, these are all very basic projects or projects that are not convenient for off-site testing.

For example, particle composition, hydraulic properties, conductivity, pH, etc.

Either there is no change, or the changes are irregular.

In short, none of them show particularly obvious research value like the deep water content just mentioned.

At this time, Zhai Mingguo, who had been sitting on Chang Haonan's left, continued to speak:

"Originally, we planned to let the three members of the geological exploration team take the stage first, and then it would be our turn."

"But I see that Chief Engineer Li is so anxious to hear it, so why not just change the order?"

The slightly joking tone made the atmosphere in the meeting room suddenly become a little more relaxed.

Although Zhai Mingguo used a question structure and was addressing Li Nianheng, it was obvious that he was not seeking the latter's opinion.

"That's good. This way we can talk about the conditions of each type of terrain together."

Chang Haonan nodded:

"Otherwise, if you wait a little longer, by the time you tell me the detailed test results, you might have forgotten a lot of the things I mentioned earlier."

Seeing that his proposal was accepted, Zhai Mingguo immediately looked at the other young man who was still wearing a laboratory uniform:

"Then Xiao Lu, go up and report your findings to your comrades!"

Sample testing is not started uniformly after the exploration team returns, but is carried out as soon as the samples are collected and delivered.

So even though the first round of exploration ended only three days ago, most of the test results have already come out.

The young man named Xiao Lu stood up immediately:

"Yes!"

Then he strode towards the podium.

Seeing this scene, Chang Haonan also sat up slightly——

Although the content of the conversation between the two parties seemed ordinary, considering the tone and expression of their speech, it was obvious that they were holding back something big, ready to shock their peers for a whole year after they took it out.

"Comrades, my name is Lv Jinhui. I am responsible for analyzing all samples from the two areas of the Alxa region. Specific projects include..."

Lu Jinhui's voice trembled slightly.

He doesn't look much older than Chang Haonan. He must have just entered the research institute and doesn't have much experience in dealing with big situations.

Now that I’m suddenly facing so many colleagues and seniors, I can’t help but feel a little nervous.

After a brief opening statement, Lu Jinhui went straight to the point.

"After the samples were naturally air-dried, they were passed through a 2 mm sieve to determine the sand particle composition; they were passed through a 0.25 mm sieve to determine the soil organic carbon content and total nitrogen content; a cylindrical sand column with a diameter of 75 cm and a height of 150 cm, wrapped with a rubber film, was used to determine the effective stress of dry sand..."

As the content became more and more in-depth, his speaking speed became much smoother than at the beginning.

"From the test results, we found that the Tengger Desert, especially the 19 deep sampling samples relatively concentrated in the southeastern side of the Tengger Desert, which we call the Tengger A group, have relatively special physical properties."

"Of course, the two research objects this time, Badain Jaran and Tengger, actually have some characteristics that have not been noticed before, so the special features I just mentioned are relative to the typical shallow surface sands of deserts that have been studied more in the past."

Having said that, Lu Jinhui turned around and clicked the mouse.

Two photos that were obviously magnified under a microscope were projected onto the screen. They looked like two grains of sand, one large and one small.

The larger one appears angular, while the smaller one is relatively smooth and closer to a perfect sphere.

There is a series of tables below each of the two pictures, which contain a series of physical and chemical properties data.

Lu Jinhui paused for a moment to give everyone time to read the contents of the PPT clearly, and then continued:

"Generally speaking, because desert sand is weathered over the years, its particles are finer, its outer contour is smoother, and it usually contains a higher proportion of harmful salt components, so it cannot completely replace river sand as a building material."

"However, after analysis, it was found that the sand particle samples in Group A showed a crystalline structure of silica, which has potential volcanic ash activity. Therefore, it can be used as a substitute for cementitious materials to a certain extent. Although its gradation is still relatively general, its chemical composition and mineral composition are relatively close to river sand..."

"In addition, we also conducted a bearing capacity test on sand foundations and found that after the loading strain rate of the samples in area A was instantly increased, the shear stress increased instantly, but it will gradually fall back to the original loading curve as the loading process progresses..."

Simply put, Lu Jinhui's discovery is that the desert sand in this area has the potential to replace river sand as fine sand and medium sand in concrete components, but further blending and modification experiments are needed.

In this light, the excitement that Zhai Mingguo showed just now is understandable.

Although river sand is not a scarce resource at present, with the acceleration of urbanization across the country and the rapid rise of the real estate industry in recent years, pure natural building materials will sooner or later fail to meet the huge demand of the construction industry.

But compared to river sand, desert sand is inexhaustible. Even if it is just an area in a desert, it has huge development potential.

Even though the desert resources belong to the country and cannot be directly converted into cash, this is not the point for researchers like them.

Rather, in recent years, such projects related to large-scale infrastructure have been relatively easier to participate in the evaluation of national science and technology awards.

Furthermore, national science and technology awards are a necessary condition for promotion to the academician level...

I worked at the Chinese Academy of Sciences, and the Institute of Geology and Geophysics had just been merged and was in a period of transition.

It's normal to have such thoughts.

However, understanding is understanding.

Chang Haonan was a little disappointed——

This is indeed likely to produce a series of significant results, but it is not an area that interests him.

Of course, just a little bit.

After all, no matter what, Lu Jinhui's test results have proved the effectiveness of data dimensionality reduction technology.

As long as you have this first application, you don’t have to worry about the second or third time…

You should know that high-order data dimensionality reduction, like numerical calculation methods, is something at the methodological level, and is sufficient to support another tool system of similar size to TORCH Multiphysics.

Even, a new industry.

As long as it can be promoted, there will be no problem in digging out what Chang Haonan is really interested in.

However, it can be seen that most people are still very interested in this result.

While Lv Jinhui was introducing this section, someone quickly asked a question:

"Xiao Lu, I saw that you tried to mix desert sand and river sand to prepare several groups of concrete samples. The strength performance was average, but the toughness seemed good?"

"Well... our research is mainly about geology, not civil engineering, so I am just putting out these concrete samples for your reference."

Lü Jinhui replied:

"At present, we can only say that the specific characteristics are related to the mixed materials and the proportion of ingredients. We cannot draw a conclusion based on a few test results."

"If there really is such a high-toughness building material, it can be used in the permafrost layer we are responsible for exploring, and can be used as a foundation or roadbed."

"Well, the soft soil foundation in coastal areas can also be modified with this material..."

"..."

Everyone was talking at once, and the heated discussion lasted for about twenty minutes.

Although Chang Haonan was not very interested in it personally, he did not say anything to stop it.

First of all, listening to other people's research content and ideas is itself part of research.

For example, the idea of ​​modifying the foundation with high-toughness materials seems to be very suitable for the China Petroleum Pipeline Bureau to reduce the engineering difficulty during pipeline laying.

After the heated discussion came to an end, Li Nianheng finally spoke again:

"Researcher Lu, in addition to the characteristics of the samples in Group A of the Tengger Desert, I remember you just mentioned that the deep samples in the Badain Jaran Desert also have some features that are different from what we knew in the past?"

As an expert in the field of satellite remote sensing, he is more interested in knowing what are the special characteristics of the geological regions that exhibit different signal characteristics.

Because, if some rules can be summarized and concluded from it, it will be like a shot in the arm for the entire space-based remote sensing industry.

Around 2000, the overall scale of the aerospace industry was small, and its importance in the national economy had not yet been fully reflected.

Simply put, we are still in the investment stage of long-term investment and have not seen any obvious results.

Therefore, the superiors still have some concerns about spending a lot of money on aerospace.

And if he can produce some impressive results, he will be more confident when he asks his superiors to launch more remote sensing satellites in the future.