wavenovel Chapter 910 is reasonable
Chapter 910 is reasonable
Chapter 910 is reasonable
Wang Chuanxing made a copy of the paper with Jiang Yuanyou's age of death and gave it to several experts to read.
Professors Sun, Li and Zhang drew something on the paper and divided the page into three parts. Then they set up their positions and started checking.
They are too familiar and accustomed to looking at other people's achievements and giving comments on them.
Despite this, the three were still 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 a corpse at death is 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 will naturally try various methods. A typical method is to use a more suitable regression equation.
The regression equation is not a martial arts secret, but more of a statistical result, and is basically public - but it is a bit like a martial arts secret. Some scholars have studied or statistically developed a useful regression equation, and they don't have to make it public, and they can use it for themselves. Especially today when there are more and more horizontal commercial projects, even if scholars want to make their newly researched regression equations public, commercial companies may not be happy.
On the other hand, the most important thing about the regression equation is not the equation itself, but its prerequisites, that is, under what conditions, what regression equation to use.
This is also very much like a martial arts secret. 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 Asians. Whether it works well or not, whether to adjust it, whether to add a coefficient, and where to add the coefficient, that is a very sophisticated part, and it is also very much like a martial arts secret.
Furthermore, a regression equation that is very suitable for judging the age of death based on the nose bones of yellow people is not necessarily accurate for all yellow people. After all, yellow people include Sino-Tibetan language family, Uralic language family, Mongolian language family, Tungusic language family, Eskimo-Aleut language family (ancient Siberian languages), Austroasiatic language family, Indonesian language family, Indian languages, and Polynesian language family. And just looking at the facial features of Chinese people, there are seven major classifications, including Bohai Rim type, North China type, Northwest type, Central Plains type, Miao-Yao type, Baiyue type, and North Asian type. (Note)
In addition, the temperature and humidity of the area where the corpse is located, the altitude, whether it is above ground or underground, and the classification of local insects or microorganisms will all affect the statistical results.
Therefore, it is easy to make a rough judgment and use various general regression equations at will, but if you want to be accurate and detailed, it is very difficult.
At the very least, you have to first identify the various properties of the skeleton, 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 using those common regression equations skillfully was not a problem at all. Judging the race and environment of the corpse was also a basic exercise.
But if you keep refining it, you will eventually encounter bottlenecks.
The three men first looked for a few skeletons that they were more confident in to check, but as they counted, they began to hesitate.
Each skeleton has its own different situation. After checking the easy ones that you are familiar with, the rest is to... look up the book.
Professor Sun let go first, said "Let me check it", and asked the student to take his laptop.
When Professor Li and Professor Zhang saw this, they no longer hesitated and took out their computers and PADs, or sent messages to the students in the laboratory, asking them to send over the regression equations they needed.
The regression equations used in anthropology are all a set of six or seven, or even a dozen equations in a row. I might remember the commonly used ones, but I basically have to look up the less commonly used ones. Especially for professors, I rarely do calculations myself in daily life. Even if I remember some, I dare not use them directly from memory. If I make a mistake, it would be really embarrassing.
However, academics don’t really care about such trivial matters as whether or not one can memorize the equation. A few people still focus on verifying the age of death.
There are many skeletons in the tomb of King Yong, but the situation is very complicated. The most important thing is that the body of King Yong is in a coffin, and the queen who was buried with him was buried later. The conditions in the tomb are different. The remaining skeletons are different with and without coffins. In addition, this tomb has actually been looted, but the looting was not deep enough, so some skeletons were exposed in advance.
For anthropologists, this series of changes is like a problem that keeps becoming more difficult.
Even if it was just for verification, because the age range given by Jiang Yuan was extremely small, it made several people have a headache when calculating.
Click, click, click.
The printer kept beeping.
"Professor Li." Wang Chuanxing handed another piece of printed paper to the nearest professor and said, "This is the age of death that Captain Jiang just completed."
"Ah,... another 10?" Professor Li found it unbelievable when he saw it.
But if you say that Jiang Yuan did it recklessly, he looked down at the several corpses he had examined and obviously could not say such a thing.
"How are things going over here?" Professor Li whispered to the other two.
"There is no problem with my verification. The difference is only one or two years at most. The numbers everyone got are different," said Professor Zhang.
Professor Sun took out his cell phone and said, "I'll ask the students... Well, everything is fine after verification."
Professor Li raised his eyebrows and distributed the 10 numbers he had just obtained to three people. He randomly found a number and age for the corpse, checked the photos and the data collected at the scene, and started to verify them again.
The results are naturally consistent.
After checking this, Professor Li felt that he had overused his brain, so he just laughed, pushed the notebook in front of him, and said, "Professor Tao has found a strong helper for us."
"That's because you haven't had any contact with Jiang Yuan, and you don't have much communication with the criminal investigation circle." Tao Yajie also laughed and said, "Forensic doctor Jiang specializes in solving major cases. He has used anthropology to solve cases countless times."
"No wonder, people who do criminal investigations like to make precise judgments, right?" Professor Li found an excuse for himself.
Jiang Yuan looked up at this time and smiled: "That's not the case. Accuracy is still the first priority. If there is no urgent need, we usually take not making mistakes as the most basic requirement."
"That's right." Professor Li subconsciously followed Jiang Yuan's words, and then he changed his mind and suddenly felt a sense of Versailles.
You aimed at the most basic requirements, but ended up accurately determining the age of death of the corpse to the year?
From an anthropological perspective, this can almost be considered a form of showing off.
"Wait a few minutes." Jiang Yuan had no intention of chatting. After saying a few words, he lowered his head and got busy again.
Less than 10 minutes later, Jiang Yuan handed the A4 paper to Wang Chuanxing again, and then smiled and said, "In this way, the determination of the age of death is completed. What should we do next?"
The three absent-minded professors all looked up involuntarily.
"The determination of age of death has been completed." The three did not know how to express themselves.
In fact, if any of the experts had been in any fingerprint group, forensic group or trace examination group, they would never argue with Jiang Yuan about the identification of age of death.
Jiang Yuan's LV6 time of death identification can't be said to be omniscient, nor can it be said to be perfectly adapted to the identification of the age of death, but with this level of skills and LV3 forensic anthropology, it is still a crushing level. Compared with ordinary expert players who reach the top at LV3, it can be said that he can kill gods and Buddhas.
"Next, I will determine the cause of death." Jiang Yuan assigned the task to himself, and it was so reasonable that it was impeccable.
The three professors nodded subconsciously.
Note: When reading this paragraph, some readers may say that it is too boring. Please listen to my argument: First of all, I think this paragraph is meaningful. If I simply say that there are several types, it is not interesting. It may take dozens of words to name these specific names, but I think that in terms of expression, it is different. This way, it is more interesting. Secondly, although I am not doing popular science, but what are the classifications of yellow people and what are the seven major types of facial features of Chinese people, this useless knowledge is occasionally used as a topic of conversation, so it must be worth spending dozens of words. Of course, it may not be useful to use it for dating. Third, in terms of writing investment, it is actually far from being so troublesome to waste a few words. Dialogue is the easiest way to waste words - this is the experience of an old author who does not want to be named. The most important investment in writing this paragraph is actually how to express it, that is, what to write, followed by how to write it, and thirdly, it actually takes longer to look up information. Fourth, even if I am a self-proclaimed hand-clumsy author, I can easily finish 3000 words in an hour in terms of typing speed, but it often takes me more than 10 hours to complete daily updates of 800 to words, or to words. Why does it take so long? Please don’t be fooled by those genius authors. Think back to when you were in school, how long did it take you to write an -word essay? So, I am actually a hand-clumsy person, not a hand-clumsy person. At the same time, to prove myself, it only took me a few minutes to type such a long paragraph.
(End of this chapter)