## What is/are Instability Risk?

Instability Risk - In addition, computationally simple and modal-computation free indices are proposed to identify the instability risk caused by the “improper parameters setting” of the control system of grid side converter (GSC) and the phase locked loop (PLL).^{[1]}More generally, instability risks making internal representations of information unreliable.

^{[2]}We have collected demographic data, instability risk factors.

^{[3]}Interestingly, typical morphological instability risk factors did not influence the degree of shift.

^{[4]}Each patient was evaluated for patellar instability risk factors using the Balcarek patellar instability severity score.

^{[5]}55% of the occurrence of landslides is in the range of high instability risk.

^{[6]}The analysis results in this paper can be helpful in the assessment of coal instability risk.

^{[7]}A mechanical analysis of support instability risk along the strike of coalface in thick coal seam with large dip angle: a case study.

^{[8]}The analysis demonstrates that the small-signal stability of the system during asymmetric faults is dominated by the PLL mode, and the dynamic coupling between PLL and current control loops (CCLs) will produce negative damping, which will introduce the small-signal instability risk to the system.

^{[9]}This method can be applied to evaluate whether each wind farm in the system has equilibrium points as well as evaluate the transient instability risk of the system during LVRT.

^{[10]}The operation of power systems under peak demand conditions results in higher operational costs, more instability risks and often forces an excessive use of fossil fuels.

^{[11]}Then, an optimal decision-making method is proposed to maximize the power supply of critical loads and to minimize the instability risks due to the randomness of the output power of renewable energies.

^{[12]}However, the new slope will face the instability risk of the former one when eroded by wind waves again.

^{[13]}The further research work in this paper indicates that the proposed instability risk can be alleviated and avoided via the utilization of VSC technique.

^{[14]}FRG and its EU partners faced the great number of instability risks which are projected from zones of armed conflicts located in northern part of Africa.

^{[15]}The results provide a theoretical basis for reducing the instability risk of loess slope in this area.

^{[16]}Flagging the impact of PMSGs by a computational function, the stability limit indicates that decreasing value of flagging function or/and increasing maximum eigenvalue of network reactance matrix implies increased instability risk.

^{[17]}Given this nearly 1 in 23 risk of instability, we recommend initial surveillance radiograph for all children over 3 years with Trisomy 21; repeat asymptomatic surveillance should continue in those with os odontoideum given their high instability risk.

^{[18]}In patients who do not respond to conservative treatments such as medical treatment and physical therapy, and have not developed neurological deficits, it is difficult to decide on surgical treatment because of the nerve root damage and spinal instability risk due to disruption of facet joint integrity.

^{[19]}To address the wellbore instability risk during drilling in hydrate reservoirs, a fully coupled wellbore–reservoir model for horizontal drilling through a hydrate reservoir is presented, which considers the dynamic heat and mass transfer between the wellbore and reservoir and the coupling interactions between the fluid flow, heat transfer, and evolution of mechanical properties in hydrate-bearing sediments.

^{[20]}This paper presents the theoretical proof to the finding and thus, generally concludes that the grid-connected VSG is immune to the instability risk under the condition of weak grid connection.

^{[21]}The analysis results in this paper can be helpful in the assessment of coal instability risk.

^{[22]}In order to evaluate the slope instability risk of open-pit mine more accurately, this paper establishes a slope instability risk evaluation model based on Improved TOPSIS method according to the hierarchical holographic modeling method and entropy method.

^{[23]}Due to a limitation in the magnitude of the three-phase output inverter currents, the output active power of the photovoltaic (PV) unit has been de-rated during low voltage ride through, which brings great instability risk to the power system.

^{[24]}Results show that the spatial variability of material properties significantly affects the instability risk of slopes, without considering which the risks of slope instability and dam overtopping may be overestimated.

^{[25]}The results indicate that there exists certain oscillation instability risk in the renewable energy bases, and the wind farms have an important influence on it.

^{[26]}It is of great significance for safe operation of expressways to assess the instability risk of construction site above the abandoned goaf.

^{[27]}This algorithm consists of three important parts: an adaptive network zoning algorithm, the Thevenin-based voltage instability risk predictor (VIRP) and a third-order extrapolation technique.

^{[28]}Concerning the instability risk in coordinated control, this study proposes a stabilisation method allowing large signal stability to stabilise a low voltage multi-terminal AC/DC hybrid system.

^{[29]}This instability risks causing an alarming professional gap, especially for non-profit clinical research.

^{[30]}However, when lake levels are too low, pit lakes may pose access and slope instability risks to recreational users.

^{[31]}The groundwater head increases in shallow aquifers may impact underground structures and lead to the following issues: i) an increased risk of water in-rushing hazards caused by confined water pressure during structural excavations and ii) an increased instability risk caused by groundwater buoyancy.

^{[32]}In recent years, due to the economic and environmental issues, modern power systems often operate proximately to the technical restraints enlarging the probable level of instability risks.

^{[33]}The welding process affects the geometric properties as well as it induces material degradations, causing an instability risk of the stiffened panel.

^{[34]}The finite-element results indicate that, when the clogging rate exceeded 60%, the safety factor of the slope plunged deeply, an evidence of the instability risk.

^{[35]}In order to assess the caldera rim instability risk for visitors, we followed its structural evolution from 2007 to 2015.

^{[36]}However, the usage of this financing approach in some Egyptian new cities had exposed the government to many negative financial instability risks due to the current used policies which have caused to hinge and disturb the national urban development strategies.

^{[37]}It is practically important to monitor and warn the instability risk of high-steep slope of highway during cutting.

^{[38]}More specifically, this research discusses the reason(s) for the impact of terrorism and political instability risks on the travel intentions, and calls upon the efforts of future Olympics and mega-sporting event host countries to mitigate the loss of international visitors and to boost global tourism during and after the event.

^{[39]}For all knees (n = 264), single and multivariable logistic regression was used to determine if any patellar instability risk factors affected the odds of having a cartilage lesion.

^{[40]}In addition, a method of open-loop modal analysis is proposed to detect the SSO instability risk brought about by the wind farms.

^{[41]}Based on the derivation, a method of open-loop modal analysis is proposed to detect the SSO instability risk brought about by the multivariable dynamic interactions introduced by the LCC HVDC line.

^{[42]}But, if the intercrest line intersects the spinal column at higher levels, degeneration and instability risks move to upper levels, and juxtafacet cysts may occur at the L3-L4 or upper levels.

^{[43]}Placement of the acetabular component within the traditional safe zone does not eliminate dislocation, and the relative contribution of femoral length and offset to instability risk has not been well defined.

^{[44]}Based on the investigation and analysis, this paper for a highway tunnel deep shaft engineering establishes risk assessment index systems and methods for the wellhead instability risk and the high-altitude fall risk of hoisting system, obtains the safety risk grade of the above two risks, and puts forward targeted risk control measures.

^{[45]}The existence of the organic component (MA) in MAPbBr3 guarantees its cubic crystal lattice stabilities to satisfy the tolerance factor but increases the chemical instability risk when encountering moisture, oxidation, and heat.

^{[46]}Hence, the paper reveals the mechanism about why the integration of the MTDC network may bring about the small-signal instability risk.

^{[47]}Third, the model suffers from over-adaptation (similar to overfitting when training with a few data example) and instability risk that may lead to degraded detection performance in the target domain.

^{[48]}This paper investigates the small-signal instability risk brought about by a phase locked loop (PLL) in a grid-connected PMSG wind farm.

^{[49]}This instability risks causing an alarming professional gap, especially for non-profit clinical research.

^{[50]}

## Signal Instability Risk

The analysis demonstrates that the small-signal stability of the system during asymmetric faults is dominated by the PLL mode, and the dynamic coupling between PLL and current control loops (CCLs) will produce negative damping, which will introduce the small-signal instability risk to the system.^{[1]}Hence, the paper reveals the mechanism about why the integration of the MTDC network may bring about the small-signal instability risk.

^{[2]}This paper investigates the small-signal instability risk brought about by a phase locked loop (PLL) in a grid-connected PMSG wind farm.

^{[3]}

## Slope Instability Risk

In order to evaluate the slope instability risk of open-pit mine more accurately, this paper establishes a slope instability risk evaluation model based on Improved TOPSIS method according to the hierarchical holographic modeling method and entropy method.^{[1]}However, when lake levels are too low, pit lakes may pose access and slope instability risks to recreational users.

^{[2]}

## Increased Instability Risk

Flagging the impact of PMSGs by a computational function, the stability limit indicates that decreasing value of flagging function or/and increasing maximum eigenvalue of network reactance matrix implies increased instability risk.^{[1]}The groundwater head increases in shallow aquifers may impact underground structures and lead to the following issues: i) an increased risk of water in-rushing hazards caused by confined water pressure during structural excavations and ii) an increased instability risk caused by groundwater buoyancy.

^{[2]}

## Patellar Instability Risk

Each patient was evaluated for patellar instability risk factors using the Balcarek patellar instability severity score.^{[1]}For all knees (n = 264), single and multivariable logistic regression was used to determine if any patellar instability risk factors affected the odds of having a cartilage lesion.

^{[2]}

## Sso Instability Risk

In addition, a method of open-loop modal analysis is proposed to detect the SSO instability risk brought about by the wind farms.^{[1]}Based on the derivation, a method of open-loop modal analysis is proposed to detect the SSO instability risk brought about by the multivariable dynamic interactions introduced by the LCC HVDC line.

^{[2]}

## High Instability Risk

55% of the occurrence of landslides is in the range of high instability risk.^{[1]}Given this nearly 1 in 23 risk of instability, we recommend initial surveillance radiograph for all children over 3 years with Trisomy 21; repeat asymptomatic surveillance should continue in those with os odontoideum given their high instability risk.

^{[2]}

## Coal Instability Risk

The analysis results in this paper can be helpful in the assessment of coal instability risk.^{[1]}The analysis results in this paper can be helpful in the assessment of coal instability risk.

^{[2]}

## instability risk factor

We have collected demographic data, instability risk factors.^{[1]}Interestingly, typical morphological instability risk factors did not influence the degree of shift.

^{[2]}Each patient was evaluated for patellar instability risk factors using the Balcarek patellar instability severity score.

^{[3]}For all knees (n = 264), single and multivariable logistic regression was used to determine if any patellar instability risk factors affected the odds of having a cartilage lesion.

^{[4]}

## instability risk brought

In addition, a method of open-loop modal analysis is proposed to detect the SSO instability risk brought about by the wind farms.^{[1]}Based on the derivation, a method of open-loop modal analysis is proposed to detect the SSO instability risk brought about by the multivariable dynamic interactions introduced by the LCC HVDC line.

^{[2]}This paper investigates the small-signal instability risk brought about by a phase locked loop (PLL) in a grid-connected PMSG wind farm.

^{[3]}

## instability risk caused

In addition, computationally simple and modal-computation free indices are proposed to identify the instability risk caused by the “improper parameters setting” of the control system of grid side converter (GSC) and the phase locked loop (PLL).^{[1]}The groundwater head increases in shallow aquifers may impact underground structures and lead to the following issues: i) an increased risk of water in-rushing hazards caused by confined water pressure during structural excavations and ii) an increased instability risk caused by groundwater buoyancy.

^{[2]}