The phrase "and different techniques have" is correct and usable in written English.
It can be used when discussing various methods or approaches that exist or have been developed in a particular context.
Example: "In the field of education, different techniques have been employed to enhance student engagement and learning outcomes."
Alternatives: "and various methods have" or "and several approaches have".
Computational instabilities inherent in the solution of inviscid, incompressible free-surface flow have been apparent for some time and different techniques have been used to overcome them.
Chromatic dispersion (CD) caused by an imperfect antireflection coating is a great concern for optical engineers, and different techniques have been proposed to reduce CD in optical devices.
The displacement field is expanded in a series of the buckling modes, a sine series, and different techniques have been used in analyzing the response of the dynamical system.
SVs differ in size and complexity and hence different techniques have been used to characterize them in plant genomes.
In order to evaluate dentin ultrastructure several studies [ 5, 6] and many different techniques have been performed immunofluorescence, microradiography, scanning electron microscopy (SEM), and transmission electron microscopy (TEM).
To achieve alike models of performance and dropout, different techniques have been explored.
In spite of many analytical problems related to the fairly low stability of metal peptide complexes and even of PCs themselves (because of oxidation through the creation of disulfide bridges induced by the presence of the metal) [ 10, 12], many attempts to characterize GSH and PC complexes by different techniques have been undertaken.
Studies on the total cost of diabetes in developing countries are few and of the cost analyses undertaken different techniques have been used, making attempts of comparison problematic.
Continuous glucose monitoring (CGM) can be potentially instrumental in preventing hypoglycaemia and a high glucose variability[ 9].Several different techniques have been developed during recent years, either using interstitial or intravascular positioning for measurements[ 10].
Different techniques have been implemented to measure directionality of cones using psychophysical and reflectance measurements.
