The phrase "approaches were unable" is correct and usable in written English.
It can be used when discussing methods or strategies that failed to achieve a desired outcome or result.
Example: "Despite numerous attempts, the various approaches were unable to resolve the issue at hand."
Alternatives: "methods could not" or "strategies failed to".
Conventional load-forecasting approaches were unable to respond to sudden changes in the economy, because these approaches do not consider the effect of economic factors.
However, the sampling approaches were unable to produce accurate spatially-explicit estimates of the carbon geography of Perú, with estimates falling within 10%% of the model carbon geography across no more than 44%% of the country.
After applying 7 different classifiers (BayeNet, NaiveBayes, MultilayerPerceptron, IBk, libSVM, SMO and RandomForest) it was observed that composition based approaches were unable to classify different ncRNAs.
Unfortunately, due to either the lack of resolution or associations that do not identify specific genes, these approaches were unable to identify or capture the majority of the underlying genes.
The Naive Bayes and KNN classifiers performed best on feature set 2 (with w=0), whereas the SVM-based approaches were unable to handle the large number of features this set contains.
This, according to our participants, meant that many therapeutic approaches were unable to meet needs in relation to the multifaceted and interacting nature of the children's problems: The dilemma for the looked after children really is that what's brought them into the situation is very complex.
Deterministic approaches are unable to take into account these variabilities without leading to oversized structures.
Current software architecture, management and analysis approaches are unable to cope with the flood of data.
This reliance on experimental tuning is because current modeling approaches are unable to make reliable predictions about the in vivo behavior of synthetic circuits.
Current screening approaches are unable to identify all altered samples, whilst models that attempt to correct for 'open-system' behaviour are not applicable across all diagenetic scenarios.
These approaches are unable to estimate power consumption of applications for software designers owing to the lack of information about detailed GPUs architecture or the supporting of emulators.
