Sentence examples for major difficulties are from inspiring English sources

Two major difficulties are encountered in designing the system.

The major difficulties are caused by the unknown robot system dynamics and the unmeasurable states.

By reviewing development of waste heat utilization in sintering process and sinter cooling process, two major difficulties are more and more apparent.

The major difficulties are caused by simultaneous existence of nonholonomic constraints, unknown system parameters and a quadratic term of unmeasurable states in the mobile robot dynamic system as well as their couplings.

Two major difficulties are the interactions between higher-order statistics of the stimuli and inherent nonlinearities of neural responses [1], [2] and the challenge of estimating receptive fields in high dimensional spaces with limited data [3], [4].

The major difficulties are the long timescale over which climate change will occur; the diversity of potential impacts on health; and the complex interactions among demographic changes, socioeconomic development, technological innovation, and other environmental drivers (Ebi 2008; Frumkin and McMichael 2008; Gosling et al. 2008; Kinney et al. 2008).

Climate change is a global problem and across the world there are major difficulties being experienced in reducing carbon dioxide (CO2) emissions.

Certain strains of microalgae have high lipid yields and appear to be good choices for the production of biodiesel, however, one of the major difficulties is the lack of a large-scale cost effective harvesting technique.

As other solar refrigeration systems, even if the cooling demand generally increases with the intensity of the solar radiation, one of the major difficulties is to insure a frigorific power supply when there is no, or low, solar radiation.

No major difficulties were registered.

One of the major difficulties is that many different mixed models are in existence.