我看到了幾種說法：

1. To do…, svo. 句型中的 Inf的邏輯主語與句子主語可一致也可不同：

比如：To made stereo effects, two recordings are made the some performances. √

2.不定式放句首時，邏輯主語與句子主語要一致。

To save money, he has tried every means. √

To save money, every means has been tried. ×

上述兩種說法矛盾。不了解真實的狀況是怎么樣呢？

另外：Therefore to increase the yield of the targeted reaction products, many factors are taken into consideration.這句話語法對不對呢？

你的問題句是出現垂懸修飾語（dangling modifiers)的錯誤。依據語法規則，主句主語應該和修飾語中的主語一致才正確。依據《牛津英語語法指南》第四版115（4）詞條的講解，對于垂懸修飾語，現在已經同意的是主句為形式主語或there be結構，或垂懸部分為習慣用語的情形，請看該書例句：

1. Being French, it's surprising that she's such a terrible cook.

2. Having so little time, there was not much that I could do.

3. Considering everything it wasn't a bad year.

以上使用方法都是正確的。

你的句子是不定式結構，是尚未認同的使用方法。海外一些網站的語法教學頁面也有解說，如：

http://www.biomedicaleditor.com/grammar-tip-dangling.html

Example

To investigate the relationship, a series of experiments were designed. （Incorrect)

?

?Correction：

We designed a series of experiments to investigate the relationship.

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https://www.niu.edu/writingtutorial/grammar/dangling-modifiers.shtml

Incorrect:

To see well, the lights in this room need to be adjusted.

Correct:

To see well, you must adjust the lights in this room.