Chapter 858 The Value of Space Remote Sensing
“Well...that’s it.”
Xiao Wenchang put down the water glass and walked back to the curtain:
“Our exploration unit is because We have to constantly change working positions, so we can’t carry out particularly complex tests.”
“Especially because the properties of geological samples related to desert conditions are relatively stable, we are more inclined to send more tests to the capital. .”
As he spoke, he turned another page of the PPT.
The 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 changes are 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 the left hand side of Chang Haonan, then spoke:
"Originally, we planned to have the three comrades of the geological exploration team go on stage once, and then take turns. To ours.”
“But I think Mr. Li is so eager to hear it, why don’t we just change the order?”
The atmosphere in the conference room suddenly changed. Gotta relax a little bit.
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 that the conditions of each terrain can be explained together."
Chang Haonan nodded:
"Otherwise, if we wait a little longer, Maybe when you tell me the detailed test results, you will have forgotten many of the things mentioned earlier."
Seeing that his proposal was agreed, Zhai Mingguo immediately looked at the other person opposite who was still wearing a laboratory uniform. of young people:
"Then Xiao Lu, go up and report to your comrades what you have discovered during this period!"
The sample testing did not begin after the exploration team came back, but was collected and tested as needed. .
So even though the first round of exploration ended only 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 obviously I have a big one in my hand, ready to take it out and shock my 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..."
Lv 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 that I am suddenly facing so many colleagues and seniors, it is inevitable that I will be 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 sample with a diameter of 75cm, a height of 150cm, and a surrounding A cylindrical sand column wrapped in a rubber film is used to measure 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 subjects this time, Badain Jaran and Tengger, actually have some characteristics that have not been noticed before, so the specialness I just mentioned is that compared with the more researched in the past Typical desert shallow surface sand."
At this point, Lu Jinhui turned around and clicked the mouse.
Two photos that were obviously magnified by a microscope were projected on the curtain. They looked like they should be two grains of gravel, one large and one small.
The larger one looks 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, which contain a series of physical and chemical property data.
Lu Jinhui paused for a moment, allowing everyone time to read the content on the PPT clearly, and then continued:
"Generally speaking, because desert sand has been weathered all year round, the particles are finer. , the outer contour is smoother, and 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 Silica with a crystal structure 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 general, its 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 as the loading process progresses. On the curve..." 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 the moment, with the acceleration of urbanization across the country and the rise of the real estate industry in recent years, which is comparable to a rocket, pure natural architecture Sooner or later, materials will one day not be able 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 if the desert resources belong to the country and cannot be directly monetized, for researchers like them, that is not the point.
But in recent years, it has been relatively easier for projects related to large-scale infrastructure to participate in the review of national science and technology awards.
Furthermore, national science and technology awards are a necessary condition for promotion to the academician level...
Working at the Chinese Academy of Sciences, and the Institute of Geology and Geophysics has just merged. A period of time and effort.
It is normal to have such thoughts.
However, understanding is understanding.
Chang Haonan was a little disappointed -
This may indeed lead to a series of significant results, but it is not an area of interest to him.
Of course, just a little bit.
After all, in any case, Lu Jinhui’s detection results have proven the effectiveness of data dimensionality reduction technology.
And as long as you have this first application, you won’t have to worry about the second or third time...
You must know that high-order data dimensionality reduction is the same as numerical calculation methods and belongs to the methodology level. It is also enough to support another tool system similar in size to TORCH Multiphysics.
Even, a new industry.
As long as it can be promoted, there is no need to worry about discovering what Chang Haonan is really interested in.
However, it can be seen that most people are still very interested in this result.
While Lu Jinhui finished introducing this section, someone quickly raised a question:
"Xiao Lu, I saw that you tried several sets of concrete samples prepared by mixing desert sand and river sand. The strength is average, but the toughness seems to be good?"
"This... our research is mainly on geology. , rather than civil engineering, so I only released these concrete samples to give you a reference."
Lu Jinhui replied:
"At present, we can only say that the specific characteristics and blending materials are. It all has something to do with the composition ratio. We can’t draw a conclusion based on a few sets of test results.”
“If there is such a high-toughness building material, then it would be used in the permafrost we are responsible for exploring. It can be used as foundation or roadbed. ”
"Well, there are also soft soil foundations in coastal areas. You can also consider using this material for modification..."
"..."
Everyone, please say something to me. , the lively discussion lasted for about twenty minutes.
Although Chang Haonan had little personal interest, he did not say anything to stop him.
First of all, listening to other people’s research content and inspiration is itself part of research.
For example, the idea of using high-toughness materials to modify the foundation seems to be very suitable for the Huaxia Petroleum Pipeline Bureau to reduce the engineering difficulty in 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 Group A in the Tengger Desert, I remember you just mentioned However, there are also some parts of the deep samples in the Badain Jaran Desert that are different from those recognized in the past?”
As an expert in the field of satellite remote sensing, he still wants to know about the geology that shows different signal characteristics. What is special about the area itself?
Because, if some rules can be summarized from it, it will be 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.
To put it simply, we are still in the investment stage of long-term investment and have not seen any obvious results
So, the superiors still have some concerns about spending a lot of money on aerospace. of.
And if he can produce some powerful results, he and his superiors will be more confident in the future when they ask for the launch of more remote sensing satellites.
(End of this chapter)