Hearing the meaning of Zhao Guoyang's words, Hassel nodded again and again: "Since this is the case, it is the best."
Zhao Guoyang waved his hand humbly and said: "Mr.
Hassel is too polite, I will talk to you about the idea of this evaluation plan."
In the conference room, Zhao Guoyang talked eloquently: "In my opinion, the subjective evaluation method of ride comfort is to quantify psychological phenomena, or assign values to psychological phenomena. ” "Whether it is the functional examination method, the SD method, the interrogation paper method, or the qualitative measurement method, they are all built around this."
Turning his gaze to Hassel, Zhao Guoyang opened his voice word by word: "This plan of mine is actually a kind of SD method" Hearing this, Janing Kellerman, head of public relations and communication of Skoda Automobile, opened his voice with some doubts: "Mr.
Zhao, what is the concept of this SD method.
Can you explain that to us?"
Zhao Guoyang nodded disapprerovingly and explained: "The so-called SD is the abbreviation of the English Seanticdifferentiathod, that is, the differential method of meaning. ” This method was first proposed by Professor Osgood of the University of Illinois in the United States.
It uses several adjective pairs related to an evaluation object as a scale to measure people's subjective response to the stimulus of the object. ” "When using this method, it is believed that the vibration characteristics of the vehicle, the interior environment, and the physical and psychological conditions of the occupants are the four main factors that affect the ride comfort."
After listening to Zhao Guoyang's explanation, the participants of the "Skoda Automobile Company" all showed a sudden expression.
Speaking of which, the "SD Law" was proposed two or three years ago.
Because it is still in the stage of theoretical refinement, this method has not been popularized in the global automotive industry, and not many people know about it, even in the industry.
Even one of the biggest names in the automotive industry, such as Hassel, is not clear about this method.
The reason why Zhao Guoyang understands this method so well is naturally because of the memory of his previous life.
At this time, after his theoretical explanation, the bigwigs of "Skoda Automobile", no matter how much they know about technology, no longer dare to have the slightest contempt for him.
Zhao Guoyang paused, and then said: "In this plan, I tried to use the SD method in psychometry through the road test of the real car, and subjectively evaluated the ride comfort of the car with the content of body vibration, indoor environment, and the psychological and physiological conditions of the occupants. ” "At the same time, I introduced the fuzzy measure and fuzzy integral in fuzzy theory to construct a hierarchical model of subjective evaluation of automobile ride comfort, and verified the applicability of the model."
Zhao Guoyang raised his hand and gave an example: "In my plan, when using the SD method for subjective evaluation, I listed a questionnaire.
There are 24 different adjective pairs listed in the table. ” "These adjective pairs, which are used as evaluation scales, were determined through a preparatory test of ride comfort, based on the adjectives that the tester associated with the tester, and with reference to similar studies."
When Zhao Guoyang said this, Hassell couldn't help but raise his own questions.
"Mr.
Zhao, I don't know if you can give us a general explanation of what you are investigating in this questionnaire."
Zhao Guoyang bowed slightly: "This is no problem, I can tell you a little bit." ” "First of all, before passengers get on the bus, there are four things that need to be evaluated, namely: the environment in the car, the vibration of the body, the evaluation of people's physical condition, and the evaluation of people's mental condition."
"After the evaluator got into the car, in my plan, the interior environment was subdivided into six survey contents: narrowness, air fragrance, seat softness, seat comfort, stuffiness in the car, and backrest comfort."
"In addition, in terms of vibration, six items have been added, such as vibration intensity, vibration feedback sluggishness, vibration softness, vibration rate, vibration rhythm, and vibration intensity."
"For the physical condition of the passengers, the program also has six evaluation contents, namely: heartbeat, energy, dizziness, vomiting, throat dryness and humidity, and tiredness."
"Finally, the psychological state of the passengers, my plan also has six evaluation contents: peace of mind, nervousness, happiness, impatience, boredom, and comfort."
Speaking of this, Zhao Guoyang paused slightly, and then continued: "Everyone should have seen it too.
My plan, after the passengers get on the bus, a total of 24 points are evaluated. ” "These points combine to construct my SD method, a hierarchical model of the subjective evaluation of car ride comfort."
After Zhao Guoyang's detailed explanation, a burst of inhalation sounded in the conference room.
Indeed, even people who don't understand the evaluation of car comfort at all, after listening to Zhao Guoyang's plan, they will have a feeling of sudden enlightenment.
Not to mention the attendees of the "Skoda Company" here are all elite figures in the industry.
There may not be many people here who are engaged in technology, but everyone must have the ability to distinguish between good and bad solutions.
There is no doubt that Zhao Guoyang's "SD method", although according to his words, is only in the experimental stage, but its feasibility is undoubtedly quite strong.
At this point, you only need to look at the brilliance on the face of Hassel, the director of the R&D department, to guess a rough idea.
After Zhao Guoyang finished speaking, he nodded to the bigwigs present, and then 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 working on the "Iveco" plan for the "Jinling Automobile Group Company".
Later, although there were not many opportunities to communicate with the technical staff of Jinling Automobile Group Company, Zhao Guoyang did not fall behind in this method of evaluating the comfort of the car, and has been improving.
When he first participated in this meeting, Zhao Guoyang saw that the people of "Skoda" had a feeling of high self-esteem, and after thinking about it, he came up with his own theoretical "SD method" to give the other party a disadvantage.
Speaking of which, although Zhao Guoyang's method has not yet been finalized, the final success is already predictable.
In terms of patent applications, Zhao Guoyang greeted Li Kejian and Li Lao early in the morning.
Once it is finalized, the "patent" will be sent to Mr.
Li in his own name, and he will come forward and send it to the State Patent Office for evaluation.
According to Zhao Guoyang's own estimate, that is, within two or three weeks, his patent can be formally formed and transferred to the application process.
Therefore, for saying so much to himself just now, Zhao Guoyang is not worried about being plagiarized by the people of "Skoda Automobile Company".
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After Zhao Guoyang finished speaking, there was silence in the conference room for a while.
After a long time, Hassel breathed a sigh of relief, clapped his hands and said: "Mr.
Zhao, your SD method is really novel, it is breathtaking."
"I still have a question about the adjectives you are talking about, though" "Mr.
Hassel, please speak," Zhao Guoyang stretched out his hand and made a "please" gesture.
Hassel scratched his hair and asked puzzledly: "Mr.
Zhao, what I want to ask is, how are the adjective pairs used in your SD method designed to be antonyms, right?"
"Well, in principle, it's all antonym pairs, such as good and bad, male and female."
Zhao Guoyang shrugged his shoulders and said: "In fact, one of the basic principles of the SD method is that the distribution of adjectives should be subjectively evaluated, and adjectives with similar meanings should be avoided as much as possible. ” "In addition, it should also be avoided to concentrate adjectives with good impressions or bad impressions on the same side, i.e. they should be appropriately dispersed and cross-distributed."
Hassel nodded in relief and asked a second question.
He said thoughtfully: "Mr.
Zhao, what method was used to statistically analyze the results of the SD method for the subjective evaluation model of ride comfort that you constructed?"
Hearing that the big guy asked such a key question, Zhao Guoyang secretly praised in his heart.
Indeed, building a model is only the first step in the subjective evaluation of ride comfort, and the final result is still to be analyzed after a large amount of data is piled up.
Although Hassell is only the first to come into contact with the "SD method", he can point out the key points, and his technical attainments are still very strong.
After a moment of silence, Zhao Guoyang explained: "Usually for the analysis of this model, the most commonly used method is factor analysis. ” "The method can explain the phenomenon that occurs in a certain field with fewer intrinsic factors than the number of observed characteristic types."
"Well, factor analysis, which I also know is a method that is often used to evaluate the comfort of a car," Hassel replied in response to this.
Zhao Guoyang smiled slightly and continued: "What Mr.
Hassel said is right.
However, when using factor analysis, the average value of all evaluators is often used as the evaluation value of a certain evaluation object, and it is easy to make errors with the actual situation. ” "And when considering the joint effect of multiple factors, it is often affected by human factors such as the evaluator's personal experience, habits, and current physiological and psychological conditions, so that the independence between several evaluation items may not be established."
"In addition, due to the large individual differences between the evaluators, if the average value of all evaluators is used as the evaluation value; It will inevitably lead to a large error. ” Speaking of this, Zhao Guoyang smiled and said confidently: "Therefore, I have also added the method of fuzzy theory to my evaluation plan to solve the problem that this kind of evaluation itself is relatively ambiguous. ” "What is the fuzzy theory" Hearing this, Skoda Larsson asked.
Zhao Guoyang looked at the big guy and patiently explained: "Fuzzy theory and method is a mathematical theory and method developed in the past 30 years to deal with such ambiguous phenomena and events. ” "Using fuzzy measures and fuzzy integrals in fuzzy theory to construct a subjective evaluation model of car ride comfort is also one of the core contents of my plan":