Chapter 858 The Value of Space Remote Sensing

"Well...that's right."

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

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

"Especially since the properties of geological samples related to desert conditions are relatively stable, we are more inclined to send more tests to the capital for testing."

As he spoke, he turned another page of the PPT.

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

Of course, as Xiao Wenchang said, they are all very basic or items that are not convenient for remote testing.

Such as particle composition, hydraulic properties, conductivity, pH, etc.

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

In short, it does not show particularly obvious research value like the deep water content just now.

At this time, Zhai Mingguo, who had just been sitting on Chang Haonan's left hand side, then spoke:

"Originally, we planned to have all three comrades from the geological exploration team take the stage, and then it would be our turn."

"But I see that Mr. Li is so eager to hear it, why don't we just change the order?"

The slightly joking tone made the atmosphere in the conference room suddenly relaxed.

Although Zhai Mingguo used an interrogative sentence and addressed it to Li Nianheng, he was obviously not seeking the latter's opinion.

"That's good, so we can finish explaining each type of terrain at the same time."

Chang Haonan nodded:

"Otherwise, if we wait a little longer, by the time you tell us the detailed test results, you may have forgotten many of the things mentioned earlier."

Seeing that his proposal was agreed, Zhai Mingguo immediately looked at another young man opposite who was still wearing laboratory clothes:

"Then Xiao Lu, go up and report what you have discovered during this period to your comrades!"

The sample testing is not started after the exploration team returns, but is tested as they are collected and delivered.

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

The young man named Xiao Lu stood up immediately:

"yes!"

Then he strode towards the podium with long strides.

Seeing this scene, Chang Haonan also sat up slightly -

Although the content of the conversation between the other two seemed ordinary, considering the tone and demeanor of the words, it was obvious that they had a big bottle in their hands and were ready to take it out and shock their peers for a whole year.

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

Lu Jinhui's voice was slightly trembling.

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

Now suddenly facing so many colleagues and seniors, it is inevitable to feel a little nervous.

After a brief opening remarks, Lu Jinhui went directly to the topic.

"After the sample is naturally air-dried, it is passed through a 2mm sieve to determine the composition of sand particles; it is passed through a 0.25mm sieve to determine the soil organic carbon content and total nitrogen content; a cylindrical shape with a diameter of 75cm, a height of 150cm, and a rubber film wrapped around it is used. Sand column, used to determine the effective stress of dry sand..."

As the content deepened, his speaking speed became much smoother than at the beginning.

"From the test results, we found that the Tengger Desert, especially the relatively concentrated 19 deep sampling samples on the southeast side of the Tengger Desert, which we call the Tengger Group A, has 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 specialness I just mentioned is compared to the typical deserts that have been studied more in the past. In terms of shallow surface sand.”

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

Two photos that were obviously magnified by a microscope were projected on the screen. They looked like two large and small grains of gravel.

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

There is also a series of tables below each of the two pictures, with a series of physical and chemical property data on them.

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

"Generally speaking, because desert sand is weathered all year round, 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 present a crystal structure of silica, which has potential volcanic ash activity, so it can be used as a substitute for cementitious materials to a certain extent, although its gradation is still relatively average. But the chemical composition and mineral composition are relatively close to river sand..."

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

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

From this point of view, the excitement 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, natural building materials will sooner or later fail to meet the huge demand of the construction industry.

But compared with river sand, desert sand is inexhaustible, and even if it is only an area in a desert, it has huge development potential.

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

Rather, in recent years, such projects related to large infrastructure are 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...

Working in the Chinese Academy of Sciences, and the Institute of Geology and Geophysics just happened to be in a period of transition from the merger.

It is normal to have such thoughts.

However, understanding is understanding.

Chang Haonan was a little disappointed-

This is indeed likely to give rise to a series of significant results, but it is not the field he is interested in.

Of course, just a little bit.

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

And as long as there is this first application, there is no need to worry about the second and third times...

You know, high-order data dimensionality reduction is something at the methodological level, just like numerical calculation methods, and it is enough to support another tool system similar to TORCH Multiphysics.

Even a new industry.

As long as it can be promoted, there is 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 finishing his introduction, someone asked a question:

"Xiao Lu, I saw that the strength of the concrete samples you prepared by mixing desert sand and river sand was average, but the toughness seemed good?"

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

Lv Jinhui replied:

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

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

"Well, there are also soft soil foundations in coastal areas, which can also be modified with this material..."

"..."

Everyone talked one after another, and the heated discussion lasted for about twenty minutes.

Although Chang Haonan was not very interested, he did not stop it.

First of all, listening to other people's research content and ideas is also part of the 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 the pipeline laying process.

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

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

As an expert in the field of satellite remote sensing, he still wants to know what are the special features of those geological areas that show different signal characteristics.

Because, if some rules can be summarized from them, it will be equivalent to a shot of adrenaline for the entire space-based remote sensing industry.

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

In short, it is still in the investment stage of long-term investment, and no obvious results have been seen.

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.