The phrase "at present there exist" is correct and usable in written English.
It can be used to indicate the current existence of something or to describe a situation that is true at the moment of speaking or writing.
Example: "At present, there exist several challenges that we must address to improve our project outcomes."
Alternatives: "Currently, there are" or "At this time, there exist".
At present, there exist no magnetometers between Addis Ababa and Adigrat.
At present there exist a large number of kinds of sensor nodes developed by universities, research institutes and companies.
At present, there exist special services for transferring data to and from the GDS for EDR measurement data.
At present, there exist several ionosphere models including IRI-2001 and IRI-2007, which allow calculations of the electron density profile and the TEC.
At present there exist two competing signaling protocols for Internet telephony, viz., the H.323 protocol sponsored by the ITU and the Session Invitation Protocol (SIP) sponsored by the IETF.
At present, there exist many well-known methods for (d_{k}), such as the Newton method, the trust region method, and the quasi-Newton method, etc. (i) The Newton method has the following form to get (d_{k}): nabla e(x_{k}) d_{k}=-e(x_{k}).
At present, there exists no systematic methodology for identifying and optimizing formulation design that can select from existing components to develop formulations meeting a suite of desired product attributes.
At present, there exists no technique capable of deriving the analytical structure of these fuzzy controllers.
At present, there exists very little indication of the efficacy of the particular treatment.
At present, there exists no hypotheses to explain this finding, other than discreteness.
At present there exists no commercial sensor, which is capable of providing online measurements of these exhaust gases as required by European legislation.
