Chapter 910 It’s very reasonable
Wang Chuanxing made a copy of the paper that determined Jiang Yuanyou's age of death and gave it to several experts to read.
Professors Sun, Li, and Zhang drew on the paper, divided the page into three parts, and then set up their positions to check.
They are too familiar with and accustomed to seeing other people's achievements and evaluating them.
Despite this, the three of them were very cautious.
Determining the age of a corpse at the time of death can be said to be a very difficult and valuable academic issue. Moreover, the determination of the age of death of a corpse is also closely related to the development and application of science and technology.
In other words, it is normal to make mistakes, and it is even more normal to have errors.
In order to reduce errors and avoid mistakes, everyone naturally has to use their own methods and try various solutions. A more typical approach is to use a more appropriate regression equation.
The regression equation is not a martial arts secret book, it is more of a statistical result, and it is basically public - but it is also a bit like a martial arts secret book. Some scholars have studied or calculated useful regression equations, and so is he. It doesn’t need to be made public, or you can just use it yourself. Especially today, when there are more and more horizontal commercial projects, even if scholars want to disclose the newly researched regression equation, commercial companies may not be willing.
On the other hand, the most important thing about the regression equation is not the equation itself, but also its preconditions, that is, under what conditions, what regression equation is used.
This is also very much like a martial arts secret book. The same regression equation may be very suitable for white people, or even more specifically, it may be more suitable for Caucasians. At this time, you take it and use it on yellow people. Whether it is easy to use or not, do you need to adjust it? Let’s take a look at whether we need to add a coefficient and where to add it. That is a very sophisticated and very important part of martial arts secrets.
Furthermore, a regression equation that is very suitable for judging the age of death based on the nasal bones of yellow people may not be accurately suitable for all yellow people. After all, yellow people include Sino-Tibetan, Uralic, Mongolian, Tungusic language family, Eskimo-Aleut language family (ancient Siberian languages), Austroasiatic language family, Indonesian language family, Indian languages, Polynesian language family. As for the facial features of Chinese people, there are seven major categories, including Bohai Rim type, North China type, Northwest type, Central Plains type, Miao Yao type, Baiyue type, and North Asia type. (Note)
In addition, the temperature and humidity of the area where the body is located, the altitude, above or below ground, and the classification of local insects or microorganisms will all affect the statistical results.
Therefore, it is very easy to make a rough judgment. Various general regression equations can be used casually, but it is very difficult to be accurate and detailed.
At the very least, you have to distinguish the various attributes of the skeleton first, and then find a suitable regression equation. If there is no suitable one, you may have to research and develop one yourself. As for the final use and calculation, that is the least valuable part.
For Professors Sun, Li, and Zhang, mastering and skillfully using those common regression equations is not a problem at all. Judging the race and environment of a corpse is also a basic exercise.
But if you want to refine and refine, you will always encounter bottlenecks.
The three people first checked the skeletons that they were more confident about, and then began to hesitate.
Each skeleton has its own different circumstances. Once the familiar and easy checking is done, the rest has to be... checked in the books.
Professor Sun let go first, said "I'll check it out", and then asked the student to take his laptop over.
When Professor Li and Professor Zhang saw it, they lost their reserve. They all took out computers and PADs, or sent messages to the students in the laboratory, asking them to send them the regression equations they needed.
The regression equations used in anthropology are all sets of equations composed of six, seven, or even a dozen equations in a row. The commonly used ones may be memorized, but the less commonly used ones basically have to be looked up. Especially for professors, they rarely do their own calculations in daily life. Even if they remember some, they don't dare to use them silently. If they make a mistake, it will be really embarrassing.
However, academics don't actually care about trivial matters such as being able to memorize equations. A few people still concentrate their efforts on checking the age of death.
There are many skeletons in King Yong's tomb, but the situation is very complicated. The most important corpse of King Yong was in a coffin, and the princess who was buried with him was buried later. The conditions in the tomb were different, and the remaining skeletons were different between those with coffins and those without coffins. In addition, this large tomb was actually robbed, but the excavation was not deep enough, and some bones were exposed in advance.
For anthropologists, this series of changes is like a problem that keeps getting harder and harder.
Even if it was just a check, because the age range given by Jiang Yuan was so small, it gave several people a headache.
Click, click, click.
The printer kept beeping.
"Professor Li." Wang Chuanxing sent another piece of printing paper to the nearest professor and said, "This is the age of death determination that Team Jiang has just completed."
"Ah... made 10 more?" Professor Li felt incredible when he looked over.
But to say that Jiang Yuan did it randomly, he looked down at the several corpses he had examined and obviously couldn't say such a thing.
"How are you doing here?" Professor Li whispered to the other two people.
"There is no problem with my verification here. The difference is within one or two years at most. Everyone takes different numbers." Professor Zhang said.
Professor Sun took out his mobile phone and said, "Let me ask the students... Well, everything checked is fine."
Professor Li raised his eyebrows and distributed the 10 numbers he had just obtained to the three of them. He randomly found the number and age of a corpse, looked at the photos and the data taken from the scene, and checked again.
The result is naturally consistent.
After checking this point, Professor Li already felt that he had overused his brain. He simply laughed, pushed the notebook in front of him, and said: "Professor Tao has found us a strong support."
"That's because you haven't had any contact with Jiang Yuan and have little communication with the criminal investigation circle." Tao Yajie also laughed and said: "Forensic doctor Jiang specializes in solving major and important cases. He has used anthropology to solve cases countless times. .”
"No wonder, criminal investigators like to judge based on accuracy, right?" Professor Li found a reason for himself.
Jiang Yuan looked up at this time and said with a smile: "That's not the case. Accuracy is still the first priority. If there is no particularly urgent need, we usually take making no mistakes as the most basic requirement."
"That's right." Professor Li subconsciously followed Jiang Yuan's words. After thinking about it, he suddenly felt the smell of Versailles.
You aimed at the most basic requirements, but ended up with the age of death of the corpses accurate to years?
From an anthropological perspective, this can almost be said to be a form of showing off.
"Wait for me for a few more minutes." Jiang Yuan had no intention of chatting. After saying a few words, he lowered his head and got busy again.
In less than 10 minutes, Jiang Yuan handed the A4 paper in front of him to Wang Chuanxing again, and then said with a smile: "In this way, the judgment of the age of death is completed, what next?"
The three absent-minded professors all raised their heads involuntarily.
"The determination of the age of death has been completed." The three of them didn't know how to express themselves.
In fact, any expert who has ever been in a fingerprint group, a forensic group, or a trace examination group will never talk to Jiang Yuan about the identification of age of death.
The identification of Jiang Yuan's LV6 time of death cannot be said to be omniscient and omnipotent, nor can it be said to be perfectly suitable for the identification of the age of death. However, with this level of skills and the forensic anthropology of LV3, it is still crushing. Compared with ordinary expert players who have reached the top level at LV3, they can also be said to be able to kill gods when blocked by God, and kill Buddha when blocked by Buddha.
"Next, let me do the appraisal of the cause of death." Jiang Yuan arranged the task for himself, but it was so reasonable that people couldn't be picky.
The three professors nodded subconsciously.