久久精品无码一区二区三区毛片,亚洲国产精品久久久久久久久久,午夜不卡久久精品无码免费,亚洲不卡无码永久在线观看

您好,歡迎光臨濟(jì)南泉誼機(jī)械科技有限公司網(wǎng)站!

服務(wù)熱線

李經(jīng)理13695310799
熱門搜索:軍事模型 航天模型 飛機(jī)模型 坦克模型 變形金剛模型 鋼雕模型
您當(dāng)前所在位置 首頁>>新聞動態(tài)>>常見問題大型航天模型淺談模型為什么經(jīng)常融合?

大型航天模型淺談模型為什么經(jīng)常融合?

發(fā)布時間:2021-05-17 來源:http://zaiguo.cn/

現(xiàn)在有一種流行的方法,將數(shù)學(xué)模型分為機(jī)理模型和數(shù)據(jù)模型。我一直認(rèn)為,對于工業(yè)應(yīng)用來說,這種分類是不合適的。因?yàn)楝F(xiàn)實(shí)機(jī)械模型往往是兩者結(jié)合在一起的,只是程度的不同。

Now there is a popular method to divide mathematical model into mechanism model and data model. I always think that this classification is inappropriate for industrial applications. Because the real mechanical model is often combined with the two, but the degree is different.

所謂機(jī)理模型,本質(zhì)上是理想模型(或抽象模型)。當(dāng)模型能夠準(zhǔn)確描述真實(shí)對象時(或誤差足夠小時),模型的計算結(jié)果能夠與實(shí)際結(jié)果高度一致,使用起來非常方便。如果模型主要從事純算數(shù)或邏輯計算、幾何對象轉(zhuǎn)換等。,計算結(jié)果確實(shí)可以與現(xiàn)實(shí)高度融合。因此,在離散制造業(yè)中,3D設(shè)計模型可以大大提高R&D效率。

The so-called mechanism model is essentially an ideal model (or abstract model). When the model can accurately describe the real object (or the error is small enough), the calculated results of the model can be highly consistent with the actual results, so it is very convenient to use. If the model is mainly engaged in pure arithmetic or logical calculation, geometric object transformation, etc., The calculation results can be highly integrated with the reality. Therefore, 3D design model can greatly improve R & D efficiency in discrete manufacturing.

但是抽象模型總歸不等于現(xiàn)實(shí)對象。例如,歐幾里得幾何學(xué)中的線是沒有寬度的,而現(xiàn)實(shí)中的線是有寬度的。牛頓力學(xué)中的質(zhì)點(diǎn)是沒有體積的,而現(xiàn)實(shí)世界中的優(yōu)良物質(zhì)是有體積的。

But the abstract model is not equal to the real object. For example, lines in Euclidean geometry have no width, while lines in reality have width. The particle in Newtonian mechanics has no volume, while the good material in the real world has volume.

                                        大型航天模型

實(shí)際工業(yè)對象是具體的。

The actual industrial object is concrete.

當(dāng)理論模型應(yīng)用于特定對象(如特定設(shè)備和工廠)時,問題就會出現(xiàn):機(jī)理模型忽視的干擾,現(xiàn)實(shí)可能不容忽視;機(jī)理模型需要測量的參數(shù),現(xiàn)實(shí)可能無法測量或無法測量。還有一個問題:當(dāng)這些誤差太大而無法忽略時,該怎么辦?

When the theoretical model is applied to specific objects (such as specific equipment and factory), problems will arise: the interference ignored by the mechanism model may not be ignored in reality; The parameters of mechanism model need to be measured, which may not be measured or measured in reality. There is another question: what to do when these errors are too big to ignore?

方案大致有三種:1。充分考慮各種干擾。但這樣做,模型的復(fù)雜性會大大提高,不一定實(shí)用;2.準(zhǔn)確測量相關(guān)參數(shù)。但是,這往往需要大量的成本,甚影響實(shí)施效率,實(shí)用性差。3.更現(xiàn)實(shí)的方法是用實(shí)際數(shù)據(jù)糾正。因此,機(jī)制與數(shù)據(jù)模型相結(jié)合。事實(shí)上,第三種方法是平時常用的。

There are three solutions: 1. All kinds of interference should be fully considered. But in this way, the complexity of the model will be greatly improved, and it is not necessarily practical; 2. Accurate measurement of relevant parameters. However, this often requires a lot of cost, even affects the implementation efficiency, and the practicability is poor. 3. A more realistic method is to correct with actual data. Therefore, mechanism is combined with data model. In fact, the third method is usually used.

眾所周知,非線性物體通??梢跃植亢喕癁榫€性模型。這是自然界中常見的現(xiàn)象。但是在工業(yè)場景中,除了局部使用的線性回歸模型之外,很少有純數(shù)據(jù)模型。因?yàn)橛眉償?shù)據(jù)模型建立非線性和時變模型時,往往難以保證可靠性,不適合工業(yè)應(yīng)用。

It is well known that nonlinear objects can be reduced to linear models locally. This is a common phenomenon in nature. However, in industrial scenarios, there are few pure data models except for the local linear regression model. Because it is difficult to guarantee the reliability when using pure data model to build nonlinear and time-varying model, it is not suitable for industrial application.

因此,工業(yè)模型上實(shí)用的數(shù)學(xué)模型,往往是機(jī)制和數(shù)據(jù)的結(jié)合。

Therefore, the practical mathematical model of industrial model is often the combination of mechanism and data.

感謝您的閱讀,希望以上內(nèi)容對您有所幫助,如您想了解更多精彩內(nèi)容請點(diǎn)擊我們的官網(wǎng):大型航天模型http://zaiguo.cn。

Thank you for your reading. I hope the above contents are helpful to you. If you want to know more wonderful contents, please click our official website: large space model http://zaiguo.cn .


- 色综合久久综合| 东京热日本大片爽| 向日葵视频88亚洲| 亚洲综合伊人久久大杳蕉| 牛牛MV成人视屏| 日韩中文字幕3c| 国产无码日韩精品| 狼友视频久久| 蜜乳一区二区三区四区在线观看| 午夜不卡福利| 人人操人人摸左线| 轻轻干国产| 最新版天堂资源中文官网| 四虎在线影院2015| 欧美性色视频-区| 日韩精品无码高清视频| 人人狠狠综合久久88成人| XXX亚洲日本| 午夜网址久久久| 伊人久久综合视频| 色哟哟射视频| 五月少妇久久| 人妻蜜と1~2中文字幕| 色噜噜狠狠综曰曰曰| 人妻斩不卡无码| 亚洲Av我射东京热| 伊人盗摄| 久久精品久久久久久久精品 | 少妇人妻无码视频| 久久久久亚洲AV综合仓井空| 精品国产91久久久久| A 区另类| 成人色区资源网| 日产午夜精品一线二线三线| 中文字幕亚洲精品在线| 超碰香蕉天天| 欧美一区二区三区不卡视频| 国产伦久久电影| 巨胸喷水www久久久| 日本2啊,乱操| 国产免费看|