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The optimal amount of social insurance can be described as the value of μ a point on the equity-efficiency tradeoff shown in Figure 1 that maximizes worker expected utility.8 ∫ u μϵ + 1 + ϕμ 1 + ϕ μ / γ η − γ η η + 1 μ / γ η + 1 dG ϵ (5).
Table 1 Voltage amplitude and objection function values of key nodes (Fault 1) Node 1 (DG) 4 5 6 (DG) 8 (DG) ABC Voltage Amplitude (kV) 98.92 5.62 68.98 64.69 127.02 Z ∗ (MW) 3.25 11.86 1.14 −9.85 0. Figure 6 shows the current phase changes of the fault power path.
The circuit breaker 'ICB' is opened to simulate an islanded microgrid, whereas the circuit breakers CB 1, CB 2, CB 3, and CB 4 are opened to isolate the DG's, i.e., DG 1, DG 2, DG 3 and DG 4, respectively, from the main distribution system.
Table 3 Voltage amplitude and objection function values of key nodes (Fault 2) Node 1 (DG) 4 5 6 (DG) 8 (DG) ABC Voltage Amplitude (kV) 98.44 3.79 68.09 63.74 127.02 Z ∗ (MW) 2.52 7.40 −1.63 −9.92 0. The phase angle changes of the fault power path are calculated and the two terminal phase angle changes of one line are compared to judge the fault.
The distribution system consists of four distributed generation (DG) units, (DG 1, DG 2, DG 3 and DG 4) each of which is a 9 MW, 575 V, 60 Hz DFIG based wind farm [23], and are connected to the distribution system at buses E, B, C and D through 10.5 MVA, 575v/ 22.9 kV transformers T r2, T r3, T r4 and T r5, respectively.
No mutations were identified among the DGs and ITs tested (0 of 1 DG and 0 of 5 ITs).
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The gravity change Δg for each grid as calculated below: (2) where (dg i, j, dg i +1, j, dgi, j+1, dg i +1, j+1) are the gravity change at one grid square.
Dollar General (nyse: DG - news - people ) ( 14, DG) operates 8,000 discount general merchandise stores in 32 states.
The bottom line is that Sigma has transformed from a consistent, reliable budget option into a hit-maker; the 50mm F1.4 DG HSM Art is the latest of its successes, but the rest of the Global Vision series, including the 35mm F1.4 DG HSM Art, the 18-135 F1.8 DC HSM and the 120-300mm F2.8mm DG OS HSM Sport are likewise impressive.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com