简介：ChengduandChongqingaretwomegalopoliseswiththesynthesizedeconomicstrengthandthestrongesturbancompetitivenessintheentirewesternregion,whichhaveveryimportantpositionsinthedevelopmentofwesternChina.Throughhorizontalcontrastofsocialeconomicdevelopinglevelofthetwocities,thetwocities'economicfoundationofunitarydevelopmentisanalyzedfromcomplementaryandintegrativerelationship.Thenthepoliciesandmeasuresofeconomicunitarydevelopmentoftwocitiesisputforward.

简介：Alongwithnecessariesappliedandthegoingdeeplyintotheresearch,thattheuni-tarymatrixandHermitematrixarepopularizedinmanykinds,andinthispaperuni-versalunitarymatrixanduniversal（oblique）Hermitematrixarestudiedfurther,andthismustbeusefulformatrixtheoryandapplications（likeoptimizationtheory,symplecticgeometryandphysicsetc）.Inthepaper,Cm×nshowsm×ncompoundmatrixset,Cnm×nshowsnstepcompoundinvertiblematrixset,A*showsconjugatetransposematrixofA,

简介：TheauthorsgivesomeconstructivefactorizationtheoremsforpluriharmonicmapsfromaKaehlermanifoldintotheunitarygroupU(N)andobtainsomeoptimalupperboundsofminimalunitonnumbers.

简介：Theauthorstudiesthestabilizationfortheunitarygroupsoverpolynomialringsandobtainsforthernsomeresultsanalogonstotheresultsoflineargroupsandsymplecticgroups,ItisespeciallyprovedthatK1U(A)=K1U(R)whereA=R[X1,…Xm],RisaringofalgebraicintegersinaquadraticfieldQ(√d).

简介：我们试验性地证明在由使用顺序的计划的二单一的操作之间的完美的辨别由Duan等求婚了[Phys。加快。Lett。98(2007)100503]也，我们显示出怎么理解计划并且在Bloch范围的图画为二维的操作计算参数。[从作者抽象]

简介：LetH∈Cn×nbeann×nunitaryupperHessenbergmatrixwhosesubdiagonalelementsareallpositive.PartitionHasH=[H11H12H21H22],(0.1)whereH11isitsk×kleadingprincipalsubmatrix;H22isthecomplementarymatrixofH11.Inthispaper,Hisconstructeduniquelywhenitseigenvaluesandtheeigenvaluesof(H|^)11and(H|^)22areknown.Here(H|^)11and(H|^)22arerank-onemodificationsofH11andH22respectively.

简介：LetAbeaunitalC*-algebra,n∈N∪{∞}.Itisprovedthattheisomorphism△n:Un0(A)/DUn0(A)→AffT(A)/△n0(π1(Un0(A)))isisometricforsomesuitabledistances.Asanapplication,theauthorhasthesplitexactsequence0→AffT(A)/△n0(π1(Un0(A)))iA→Un(A)/DUn(A)πA→Un(A)/Un0(A)→0withiAcontractive(andisometricifn=∞)undercertainconditionofA.

简介：Afamilyofauthenticationcodeswitharbitrationisconstructedfromunitarygeome-try,theparametersandtheprobabilitiesofdeceptionsofthecodesarealsocomputed.Inaspe-cialcaseaperfectauthenticationcodewitharbitrationisohtalned.

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简介：ByA.PeresandA.Stern'sopinionsacomputationalprocessevolvesalongacycliclogicorbitdefinedbyacomputation.A.Sternthoughtthatifwecoulddesignsuchacircuit,itsoperationscanbeextendedtoincludingnonconservativebehaviorassociatedwiththeexternalperturbationsorinternalquantumerrors.A.PeresdidnotdiscusshowtomakeφM-1＝φo.A.Sternproposedonlyanecessaryconditionforaconservationofastateofaquantumcircuit.Inthispaperwepresentanecessaryandsufficientconditionforauniversalconservationofastateofaquantumcircuit.Wealsofindalloperatorswhichcanallowtheconservation.

简介：Theentanglementcapacityofgeneraltwo-qubitunitaryoperatorsisstudiedwhenauxiliarysystemsareallowed,andtheanalyticalresultsbasedonlinearentropywheninputstatesaredisentangledaregiven.Fromtheresultstheconditionforperfectentangler,α_1=α_2=π/4,isobtained.Contrarytothecasewithoutauxiliarysystem,theparameterα_3mayplayactiveroletotheentanglementcapacitywhenauxiliarysystemsareallowed.

简介：在毫米波浪(mmWave)巨大多重输入多重产量(MIMO)系统因为高硬件费用和高电源消费，传统的充分数字的beamforming(DBF)不能容易被实现。同时，与阶段shifters被实现的模拟beamforming有高可获得性，但是承受差的性能。认为上面的优点是二，在可得到的反复的优化算法能近得到性能到充分数字的处理的地方，一个潜在的答案是设计适当混合类似物和数字beamforming结构，但是解决这个稀少的优化问题面对高计算的复杂性。搜寻混合beamforming(HBF)的关键挑战在利用交易在之间的矩阵谎言光谱效率性能和计算复杂性。在这份报纸，我们基于天线数组反应(AAR)建议一个asymptotically单一的混合precoding(AUHP)算法解决HBF优化问题的性质。第一，我们让最佳的直角的模拟、数字的beamforming矩阵由考虑在绝对值依靠隧道路径获得AAR矩阵是asymptotically单一的。然后，一基于递归改进了同时直角的匹配的追求(SOMP)算法被采用精制混合联合。数字结果证明我们的建议AUHP算法启用更低的计算复杂性与可以忽略光谱效率表演降级。

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简介：Inthispaper,thedesignofsignalconstellationsparametersisstudiedforDifferentialUnitarySpace-TimeModulation(DUSTM)basedonthedesigncriterionofmaximizingthediversityproduct.Further,nonintegersearchingmethodforthesignalconstellationparametersdesignisproposedinordertogetbettercodes.ExperimentalresultsshowthatunderthedifferentDopplerspreadanddatatransmissionrate,theproposeddesignperformsbetterthanthepreviousdesignusingintegerparametersinMultipleInputMultipleOutputOrthogonalFrequencyDivisionMultiplexing(MIMO-OFDM)systemoverfrequency-selectivefadingchannels.

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