After understanding the meaning of Zhao Guoyang's dialect, Hassel nodded repeatedly and said, "Since that's the case, that's the best. Then Mr. Zhao, please give me advice!"

Zhao Guoyang waved his hand modestly and said, "Mr. Hassel is so polite. I'll talk to you about the ideas of this evaluation plan..."

In the conference room, Zhao Guoyang talked happily: "In my opinion, the subjective evaluation method of riding comfort is to quantify psychological phenomena or assign psychological phenomena."

"Whether it is functional examination method, SD method, questioning paper method and qualitative measurement method, it is built around this point..."

Turning his eyes to Hassel, Zhao Guoyang opened his voice word by word: "My plan is actually a kind of SD method..."

Hearing this, Jian Ning, the head of Skoda Automobile's public relations communications, said in confusion: "Mr. Zhao, what is the concept of this SD method? Can you explain it to us?"

Zhao Guoyang nodded indifferently and explained: "The so-called SD is the abbreviation of the English Semantic Differential Method, which is the 'meaning differential method'."

"This method was originally proposed by Professor C.E. Osgood of the University of Illinois, America. It uses several adjective pairs related to a certain evaluation object as a benchmark to measure the subjective responses people have after being stimulated by the object."

"When using this method, it is believed that the vibration characteristics of the vehicle body, the environment inside the vehicle, and the physiological and psychological conditions of the occupants are the four main factors that affect ride comfort."

After hearing Zhao Guoyang's explanation, the participants of "Skoda Automobile Company" all showed a look of surprise.

Speaking of which, the "SD Law" was proposed two or three years ago.

Because it is still in the stage of theoretical improvement, this method has not been popularized within the global automotive industry production scope. Even in the industry, not many people know it.

Even a big shot like Hassel, who is a big player in the automotive industry, is not clear about this method.

The reason why Zhao Guoyang understood this method so much was naturally because of the memory of his previous life.

After his theoretical explanation, no matter how well the big men of "Skoda Automobile Company" knew about technology, they would never dare to despise him at all.

Zhao Guoyang paused for a moment, then opened his voice and said, "In this plan, I tried to pass the road test of the actual car, using the SD method in the psychological measurement method, and used the vehicle body vibration, indoor environment, psychological and physiological conditions of the passengers as the subjective evaluation of the car's riding comfort."

"At the same time, I introduced the fuzzy measurement and fuzzy integral in the fuzzy theory, constructed a hierarchical model of subjective evaluation of car riding comfort, and verified the applicability of this model."

Zhao Guoyang raised an example and said, "When I use the SD method to conduct subjective evaluation in this plan, I listed a questionnaire. The table lists 24 different adjective pairs."

"These adjective pairs, which are used as evaluation standards, are determined through a preparatory test of riding comfort, based on the adjectives associated with the tester in the experiment, and refer to similar studies."

When Zhao Guoyang said this, Hassel couldn't help but raise his own questions.

"Mr. Zhao, I don't know what the survey is in your questionnaire? Can you give us a general explanation?"

Zhao Guoyang nodded slightly and said, "This is no problem, I can tell you a little about it."

"First of all, before the passenger gets on the bus, there are four points to evaluate, namely: the environment inside the car, the vibration of the body, the physical condition of the person, and the mental condition of the person."

"After the evaluator got on the car, my plan subdivided the interior environment into six surveys, including narrowness, air fragrance, seat softness, seat comfort, humid heat in the car, and back comfort."

"In addition, in terms of vibration, six items including vibration strength, vibration feedback slowness, vibration softness, vibration rate, vibration rhythm, vibration intensity, vibration intensity are also added."

"There are six evaluations for the physical condition of the passenger, namely: heartbeat, mentality, dizziness, vomiting, dry and damp throat, and fatigue."

"Finally, my plan also has six evaluations: peace of mind, tension, mood pleasure, impatientness, boredom, and mood comfort..."

Speaking of this, Zhao Guoyang paused for a moment before continuing: "Everyone should have seen it too. After the passengers got on the bus, there were 24 points to evaluate my plan."

"These points combined together construct my SD method, a hierarchical model of subjective evaluation of car riding comfort."

After Zhao Guoyang's detailed statement, a breath of breath sounded in the conference room.

Indeed, even those who do not understand the evaluation of car comfort will feel a sudden enlightenment after listening to Zhao Guoyang's plan.

Not to mention the attendees of the "Skoda Company" present, they are all elite figures in the industry.

Perhaps there are not many people here who are engaged in technology, but everyone must have the ability to identify the quality of a solution.

There is no doubt that although Zhao Guoyang's "SD method" is still in the experimental stage in his words, its feasibility is undoubtedly quite strong.

This point is just a look at the brilliant face of Hassel, the director of the R&D department, and you can guess a rough idea.

After Zhao Guoyang finished his remarks, he nodded to the big guys present and sat down.

After sitting down, Zhao Guoyang was quite satisfied with his performance just now.

Speaking of which, his "SD method" was probably mentioned as early as when he was developing the "Iveco" plan for "Jinling Automobile Group".

Although there were not many opportunities to communicate with the technicians at Jinling Automobile Group Corporation, Zhao Guoyang did not miss this method of evaluating the comfort of car riding and kept improving it.

When Zhao Guoyang first attended this meeting, he saw that the people of "Skoda" had a high self-esteem. After thinking about it, he took out his theoretical "SD method" to give the other party a warning.

Speaking of which, although Zhao Guoyang's method has not been finalized, its final success is predictable.

In terms of patent applications, Zhao Guoyang even said hello to Li Kejian and Mr. Li early in the morning.

Once finalized, the "patent" will be sent to Mr. Li in his personal name, and he will come forward and send it to the State Patent Office for evaluation.

According to Zhao Guoyang's own estimate, within two or three weeks, his patent can be officially formed and transferred to the application process.

Therefore, Zhao Guoyang is not worried about being plagiarized by the people from the "Skoda Automobile Company" just now.

After Zhao Guoyang finished speaking, the conference room was silent for a long time.

After a long time, Hassel breathed a sigh of relief and clapped his hands and said, "Mr. Zhao, your 'SD method' is really new and amazing!"

"However, I have another question about the adjectives you said about the evaluation..."

"Mr. Hassel, please tell me!" Zhao Guoyang reached out and made a "please" gesture.

Hassel grabbed his hair and asked in confusion: "Mr. Zhao, what I want to ask is, how are the adjectives used in your SD method designed? Are they all antonyms correct?"

“Well, in principle, they are all antonyms pairs, such as good-bad, male-female.”

Zhao Guoyang shrugged and said, "In fact, a basic principle of the SD method is to subjectively evaluate the distribution of adjectives, and try to avoid putting adjectives with similar meanings together."

"In addition, adjectives with good impressions or bad impressions should be avoided on the same side, i.e., they should be properly dispersed and crossed."

Hassel nodded relievedly and asked a second question.

He said thoughtfully: "Mr. Zhao, what method should you use to conduct statistical analysis on the SD method measurement results?"

When Zhao Guoyang heard this big guy ask such a key question, he secretly praised in his heart.

Indeed, building a model is only the first step in subjective evaluation of riding comfort. The final result still requires a large amount of data to be piled up and coordinated analysis.

Although Hassel is only the first time to come into contact with the "SD method", he can point out the key point to the point, and his technical attainments are still very strong.

After pondering for a moment, Zhao Guoyang then explained: "Usually, the most commonly used method for the analysis of this model is factor analysis."

"This method can be explained by intrinsic factors that have fewer numbers of characteristics than the number of observed characteristics."

"Uh, factor analysis method, I know this! It is a method that is often used to evaluate the comfort of a car..." Hearing this, Hassel responded.

Zhao Guoyang smiled slightly and continued, "Mr. Hassel is right. However, when analyzing using factor analysis, the average value of all evaluators is often used as the evaluation value of a certain evaluation object to calculate the evaluation value, which is easy to have errors from the actual situation."

"And when considering the combined effects of multiple factors, it is often affected by human factors such as the evaluator's personal experience, habits, current physiological and psychological conditions, which makes the independence between several evaluation items not necessarily true."

"In addition, due to the large individual differences between the evaluators, if the average value of the entire evaluator is used as the evaluation value, it will inevitably lead to a large error."

Speaking of this, Zhao Guoyang smiled and said confidently: "So, in my evaluation plan, I also added the 'fuzzy theory' method to solve the problem that this type of evaluation itself is relatively 'ambiguous'."

"Fuzzy theory? What is that?" Hearing this, Skoda Larson asked a question.

Zhao Guoyang looked at the boss and explained patiently: "Funny theory and method are a mathematical theory and method developed in the past 30 years that specializes in dealing with such 'ambiguous' phenomena and events."
Chapter completed!