Just found these in my notes and maybe they are useful for someone. There is no guarantee for any usefulness since I am not a native speaker.

There are ...
These can ...
In order to ...
In this paper ...
We have chosen
We also
The primary goal of this paper ...
A second goal is ...
The paper is structured as follows:
An importan property of ...
They are
Especially in ...
The ... is defined as ... also expressed by ... which states that ...
Approaches using ... can be classified into ...:
It can be stated as <formula>.
Two assumptions are made ...
Another is that ...
This technique is
We will call ...
The ... are ...
<formula letter> is ...
Based on ...
... as follows:
    <formula>
    where <formula> is ...
The parameters
If ..., then
Because ..., the ... are
All ...
[citation numb.] suggested ...
The progresss reported in
Actually this paper ...
The method
Similar outcomes happened ...
This is because
Another issue to be considered for ...:
In other words ...
Instead we use ...
Originally ...
First we ...
The ... will be set according to ... .
The ... is <formula> = <number>.
After ..., the ... is ... .
As in [...], .... we also
The next step is ... .
Here we use ...
At this stage, ... .
For each ... <formula>, then/where ... .
Finally, ...
This allows (to achieve) ...
When ... is ..., ... can be ... (for all) ... .
It is/can ...
We combined ...
Future work will also include ...
Using ... allows to ... .
Let <x> be ...
<x> denotes ...
For example, ...
Some methods (perform) / (do this and/or that)
Other approaches ...
Examples of this can be seen in ...
In particular, ...
Moreover, ...
Along with ... is proposed.
Two applications in ... are considered:
In the case of
The theory is verified by ...
In the latter case
The models ...
These studies ...
To achieve ...
By ... (doing sth.), the ... (sth. will result)
Consequently, ... can be performed ...
In Section <Nbr> ... . Here we ...
An algorithm based on ... is proposed.
We note ...
In the case of ...