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0 -11.956 TD
[(analysis)-238.994(of)-238(the)-239.004(recei)25.004(v)14.986(ed)-238(signal)-238.994(to)-239.014(the)-237.99(injected)-239.004(one)-239.014(pro)14.986(vides)-237.98(v)14.986(ery)]TJ
0 -11.955 TD
[(rich)-251.009(information)-251.019(about)-250.999(the)-251.992(presence,)-251.009(position,)-251.009(and)-251.019(nature)-251.009(of)-251.019(the)]TJ
T*
[(impedance)-461.004(discontinuity)65.003(.)-460(This)-461.004(information)-461.014(shall)-459.98(be)-460.984(v)24.983(aluable)]TJ
T*
[(for)-394.014(maintenance)-393.994(operators)-393.02(to)-394.004(monitor)-394.014(the)-394.004(health)-393.02(of)-394.014(electrical)]TJ
T*
[(netw)10.007(orks)-255.004(and)-255.987(accordingly)-255.004(determine)-254.994(the)-255.987(de)15.016(gree)-254.984(of)-255.014(harmfulness)]TJ
T*
[(this)-458.013(f)9.987(ault)-457.983(might)-458.987(bring)-457.983(to)-457.983(the)-457.993(whole)-459.007(system.)-458.013(Inspite)-458.013(the)-457.993(f)9.987(act)]TJ
0 -11.956 TD
[(that)-370.004(promising)-370.004(results)-369.994(ha)19.995(v)14.986(e)-369.984(been)-370.014(obtained)-369.994(when)-370.004(dealing)-370.004(with)]TJ
0 -11.955 TD
[(hard)-382.009(f)9.987(aults,)-381.989(dif)24.993(\002culty)-382.029(in)-381.999(detection)-381.005(w)9.997(as)-382.009(encountered)-382.009(once)-382.019(soft)]TJ
T*
[(f)9.997(aults)-336.98(are)-337.994(addressed)-337([9].)-337.984(Re)14.996(grettably)64.993(,)-337(the)-336.99(situation)-338.024(is)-336.98(e)15.006(xpected)]TJ
T*
[(to)-241.011(be)-241.011(w)9.997(orsened)-241.011(once)-241.995(branched)-241.011(netw)10.007(orks)-241.001(are)-240.991(studied)-240.991(as)-241.021(multiple)]TJ
T*
[(echoes)-309.989(from)-310.993(dif)24.983(ferent)-309.989(impedance)-310.993(discontinuities)-309.989(in)-310.993(the)-310.019(system)]TJ
T*
[(\(junctions\))-468.984(might)-468.984(dw)10.007(arf)-468.994(the)-469.004(one)-468(corresponding)-468.984(to)-469.004(the)-469.014(f)9.997(ault.)]TJ
0 -11.956 TD
[(Indeed,)-344.017(a)-343.003(similar)-343.997(ef)25.014(fect)-343.013(is)-344.007(obtained)-343.013(once)-343.986(noise)-343.997(is)-342.993(encountered)]TJ
0 -11.955 TD
[(in)-350.009(the)-350.009(system.)]TJ
9.963 -11.955 Td
[(W)39.99(ith)-375.996(thi)1.004(s)-376.016(in)-375.996(mind,)-375.002(it)-376.006(is)-374.982(w)10.007(orth)4.989(y)-376.006(to)-374.992(note)-375.996(that)-374.982(a)-375.976(great)-375.002(resem-)]TJ
-9.963 -11.955 Td
[(blance)-479.011(e)15.006(xists)-477.998(between)-479.011(locating)-478.008(a)-478.991(soft)-477.978(f)9.987(ault)-479.001(in)-477.988(an)-479.021(NUT)-477.988(and)]TJ
T*
[(detecting)-322.004(a)-321.984(tar)17.997(get)-322.014(by)-322.024(radar)-321.994(in)-322.014(a)-321.011(cluttered)-322.004(en)39.99(vironment.)-321.984(In)-321.984(f)9.997(act,)]TJ
T*
[(multiple)-497.992(scattering)-498.013(in)-497.982(the)-498.996(propag)4.989(ation)-498.013(medium)-497.992(can)-498.002(mask)-498.013(a)]TJ
0 -11.956 TD
[(weak)-410.987(tar)17.997(get)-410.003(signature,)-411.007(jeopardizing)-410.023(its)-411.007(e)25.014(v)14.986(entual)-411.017(detection.)-409.993(In)]TJ
0 -11.955 TD
[(other)-344.007(w)9.997(ords,)-344.007(techniques)-343.997(used)-344.007(for)-343.986(tar)17.997(get)-342.993(detection)-343.997(in)-344.007(a)-343.986(generic)]TJ
T*
[(medium)-424.989(can)-426.013(be)-424.989(transposed)-426.013(to)-425.02(solv)15.006(e)-426.013(the)-425.02(problem)-425.983(of)-424.989(locating)]TJ
T*
[(weak)-377(r)1.024(e\003ecti)24.983(vity)-377.01(soft)-375.996(f)9.997(aults)-377.02(in)-376.006(comple)14.996(x)-376.99(NUTs.)-375.996(T)35.021(ime-re)24.983(v)14.976(ersal)]TJ
T*
[(\(TR\))-267.009(concept)-266.999(de)25.014(v)14.986(eloped)-265.985(in)-266.999(acoustics)-266.989(to)-267.009(retrofocus)-265.985(signals)-266.978(back)]TJ
0 -11.957 TD
[(to)-328.007(their)-326.993(source)-328.027([10],)-326.993(allo)24.983(wed)-327.977(creating)-328.017(focal)-327.003(spots)-327.987(on)-328.017(a)-327.013(tar)17.997(get')55.016(s)]TJ
0 -11.955 TD
[(location)-426.023(simply)-424.979(by)-426.003(retransmitting)-425.993(a)-426.013(time-re)24.993(v)14.976(ersed)-424.989(v)14.986(ersion)-425.993(of)]TJ
T*
[(echoes)-531.99(initiall)0.984(y)-531.98(re\003ected)-531.99(by)-530.996(a)-532(tar)17.997(get)-530.996(e)15.006(xposed)-532(to)-531.006(e)15.016(xcitation)]TJ
T*
(signals.)Tj
9.963 -11.955 Td
[(W)39.99(ithin)-525.014(this)-524.983(conte)14.986(xt,)-525.003(TR-based)-524.01(methods)-525.014(were)-525.024(adopted)-524.983(to)]TJ
ET
/Artifact <