简介：化学品和工艺工程在降低成本和提高产品质量方面的作用2008PTS纸业讨论会将于2008年9月16-19日在德国慕尼黑举行，预期将有400多位造纸专家参加此次会议。这些专家包括造纸工作者、工业供货商和研究机构人员，这将使得PTS讨论会成为了造纸界最主要会议之一。此次讨论会把焦点放在非涂布纸及纸板的生产上，并就国际性发展趋势提出一些看法。今年强调的重点是高额生产成本和高质量需求所带来的影响，这种发展趋势将带来需求方面的矛盾冲突，并威胁到许多纸厂的生存。

简介：正交频分复用技术（OFDM）的优点是具有较高的频谱利用率和较强的抗多径衰落的能力,被看作是B3G乃至4G系统中的核心技术之一,但是OFDM系统存在较高的峰均功率比（PAPR）。部分传输序列（PTS）方法通过选择合适的相位旋转因子序列以降低信号峰值出现的概率,从而降低OFDM信号的峰均比值,因此不会使信号发生崎变,但是传统的PTS技术计算复杂度大大,因而在保证有效降低OFDM信号峰均比的前提下大幅度降低传统PTS的复杂度就成为PTS技术实用化的关键。

简介：2016年9月27日，三诺生物在长沙完成收购美国PTS的交接仪式。这标志着三诺从以前的血糖仪普及推动者，向糖尿病专家迈进。三诺生物自2002年创立以来，一直专注于血糖仪的研发、生产、销售，其产品以“准确、简单、经济”的特点，迅速占领中国市场，帮助糖尿病患者更好地实现血糖的健康管理。

简介：Amachine,orothertypeof“system”,canoftenbedividedintoseveralsubsystems(components)andthesesubsystemsagaincanbedividedintosevreralsubsystems(secondgeneration).Thisprocessformsasystemtree.Toassessthereliabilityofthemachinebasedondatafromthetrialsofcomponentsofthemachine,virtualsystemmethodisemployed.ItisprovedinthepaperthatthelowerconfidentlimitofthereliabilityofthemachinesetbythevirtualsystemmethodislevelconsistentandasymptoticallyoptimalwhiletheonesetbyLindstrom-Maddensmethodisnot.

简介：摘要目的研究人参茎叶PTS苷对心肌缺血大鼠心肌重构的影响。方法选择实验SD大鼠110只，将大鼠分为5组，每组22只，分别为PTS大剂量组、PTS小剂量组、生脉注射组、模型组、假手术组，大鼠缺血模型主要应用结扎冠状动脉左前降支的方法进行制备，术前1周对大鼠进行腹腔注射给药，缺血24h后检测大鼠各项指标，分析PTS对心肌缺血大鼠心肌重构的影响。结果模型组的CK、LDH、AST水平比假手术组高，有统计学意义（P<0.05）；生脉组、PTS大剂量组、PTS小剂量组比模型组低，有统计学意义（P<0.05）；PTS大剂量组心肌细胞结构明显优于模型组，模型组大鼠心肌细胞出现梗死，PTS小剂量组大鼠心肌肌丝排列齐整，肌结明暗带结构不清晰，线粒体排列较乱，嵴不清晰；生脉注射组大鼠心肌肌丝排列齐整，肌结明暗带结构清晰，线粒体排列齐整，嵴清晰。结论PTS可保护心肌缺血大鼠的心肌结构。

简介：为了提高部分传输序列（PTS）方法在正交频分复用（OFDM）系统中降低峰均功率比（PAPR）的能力,研究了PTS方法中的子块划分问题.通过PTS的自相关函数（ACFs）和备选信号的互相关函数（CCFs）,将子块划分和降低PAPR的能力相关联.这里用Q表示ACFs的均方幅度的方差.研究发现Q值越小PTS方法所能达到的PAPR性能越好,并以此作为子块划分的设计准则.依据这一准则,对4种常见的分块方法做了比较并提出一种有效的子块划分策略.比较结果表明具有良好结构性的子块划分方法在具有低运算复杂度的同时ACFs的均方幅度方差较大,因此PAPR性能不佳.新策略可以看作是在PAPR性能和运算复杂度间所做的一种折中.仿真结果表明该策略可以在相对低的复杂度的条件下达到最优性能,同时也不会增加附加信息.

简介：Summary1.Thereare12powersystemsincluding5regionalpowersystemswithover1000MWofcapacityeach.In1989CentralandEastChinapowersystemswereinterconnectedbya±500kVHVDCLine.2.Thehierarchicalcontrolorganizationcanbedividedinto5levels,i.e.NCC,6RCCs,25PCCs,250DCCsandmorethan2000CCCs.3.AllcontrolcenterswillbeequippedwithSCADAandEMSinthenearfuture.4.Chinapowersystemhasalarge,dedicatedcommunicationnetworkofitsown.

简介：由于部分传输序列（PTS）的峰值平均功率比（PAPR）光正交频分复用还原技术（O-OFDM）系统具有更高的计算复杂度，一个新的两阶段迭代算法提高PTS（ts-eia-pts）提出了具有较低的计算复杂度的降低PAPR算法是。仿真结果表明，所提出的ts-eia-pts降低PAPR的算法可以减少通过原始信号序列划分成4个子块，在ND=5的剩余阶段的条件18.47%的计算复杂度。此外，它具有几乎相同的PAPR性能和相同的比特错误率（BER）性能的eia-pts算法，随着子载波数的增加，计算复杂度可以进一步降低。因此，该ts-eia-pts降低PAPR的算法更适合于实际应用系统。

简介：Inthispaper,wepresentahighspeedautofocussystemformicrosystemapplicationsanddesignalook-up-tablebasedautofocusingalgorithmforapplicationswhenatargetobjectisalwaysvisible,e.g.,manufacturingpartswithalignmentfiducials.Weperformanevaluationof24focusmeasurestoverifythatwhichfocusmeasureisthebestforthelook-up-tablebasedmethod.Fromtheevaluation,wefindthattheChebyshevmoments-basedfocusmeasure(CHEB)isthemostsuitable.Furthermore,wealsodevelopalook-up-tablebasedautofocussystemthatusesCHEBasthefocusmeasure.Intrainingphase,weofflineconstructatablefromtrainingimagesofanobjectthatarecapturedatseverallensdistances.Eachentryoftableconsistsoffocusmeasurecomputedfromimageandlensdistance.Inworkingphase,givenaninputimage,thealgorithmfirstcomputesthefocusmeasureandthenfindsthebestmatchfocusmeasurefromthetableandlooksupthecorrespondinglenspositionformovingitintothein-focusposition.Ouralgorithmcanperformautofocusingwithinonly2stepsoflensmoving.Theexperimentshowsthatthesystemcanperformhighspeedautofocusingofmicroobjects.

简介：AbstractPurpose:An injury surveillance information system (ISIS) collects, analyzes, and distributes data on injuries to promote health care delivery. The present study aimed to review the data elements and functional requirements of this system.Method:This study was conducted in 2019. Studies related to injury surveillance system were searched from January 2000 to September 2019 via the databases of PubMed, Web of Knowledge, ScienceDirect, and Scopus. Articles related to the epidemiology of injury, population survey, and letters to the editor were excluded, while the review and research articles related to ISISs were included in the study. Initially 324 articles were identified, and finally 22 studies were selected for review. Having reviewed the articles, the data needed were extracted and the results were synthesized narratively.Results:The results showed that most of the systems reviewed in this study used the minimum data set suggested by the World Health Organization injury surveillance guidelines along with supplementary data. The main functions considered for the system were injury track, data analysis, report, data linkage, electronic monitoring and data dissemination.Conclusion:ISISs can help to improve healthcare planning and injury prevention. Since different countries have various technical and organizational infrastructures, it is essential to identify system requirements in different settings.

简介：给满足可控制性的一个交换线性控制系统等级状况，这被显示出，以如此的一个方法构造一个非交换式的同质的多项式控制系统，后者的轨道可能任意地好是可能的有限时间间隔上的接近的标准。

简介：TheanalysisandevaluationofanactualportsystemcontainingRdifferentship’skindsandNsubsystemseachofwhichconsistsofM.(i=1,2,…,N)portsarederived.TheexternalarrivalsofshipstothesystemcomefromRdifferentPoissonsourcesandtheinterarrivalstothequeueofeachportofasubsystemaredeterminedaccordingtoconditionprobabilities.EachporthasmultipleberthswhoseservicetimesaredistributedaccordingtoErlangprobabilitydistributionfunctions.EachportofasubsystemhasRinfinitecapacitybuffersforstoringshipsinterarrived.Thismethodprovidesagoodapproximationprocedureforobtainingsystemperfor-mancemeasuressuchaswaitingtimesofships,averagequeuelengths,etc.Optimumportcapacitycanthusbeevaluatedbyusingthisanalysis.Asimulationisalsopresentedtotestthisapproximateanalysis,andagoodagreementisobserved.Thismodelshallbeusedintheplanningofseveralactualportsystems.Throughtheapplicationofthismodel,itispossibletoanalyzeandevaluateperformancesofthesystems.

简介：在在它的失败以后的一个舷侧电源系统(SPS)的电的网络的可配置性对电源供应的恢复中央并且改进SPS的survivability。航行过程创造不同操作条件的一个序列。一些负担的优先级在改变操作条件不同。在分析典型SPS的特征以后，一个模型被开发使用一个等级III总机和一个环境权衡轻重代理人(EPA)算法。当它逻辑地并且身体上象多代理人一样被分散，这个算法被选择面向。EPA算法被用来决定动态负担优先级，然后，最好遇见最大的电源供应负担选择了工具。模拟结果证明更高的优先级负担是第一被恢复。系统满足了所有必要限制，表明建议方法的有效性和有效性。

简介：

简介：Inourearlierpaper,powersystemstabilizers(PSSs)aredesignedforanine-machinesystem,anewpole-placementtech-niqueisdevelopedforthedesign,andparticipationfactorsareusedtodecidehowmanystabilizersarerequiredandwheretheyshallbe.Eachmachinebeingrepresentedbyalow-orderlinearmodel,thereissomereservationoftheresults.Inthispaper,extensivetransientsimulationsareperformedandeachmachineisrepresentedbyahigh-ordernonlinearmodel.Coherentgroupsarefound.Aweightedspeeddeviationindex(SDI)isdefinedtofindoutthemostunstablemachinesinthesystem.PSSsaredesignedafterthedecisionsofPSSnumberandsites.Transientsimulationsarecarriedoutagainfortheclosed-loopsystem.Asystemstabilityindex(SSI)isusedtoevaluatethestabilityoftheclosed-loopsystem.ItisfoundthatthreePSSsaresufficienttoensurethestabilityofthenine-machinesystem.

简介：

简介：

简介：

简介：ＲａｄａｒＳｙｓｔｅｍＥｎｇｉｎｅｅｒｉｎｇ￥ＤａｌｅＲ．Ｂｉｌｌｅｔｔｅｒ（ＲａｙｔｈｅｏｎＣｏｍｐａｎｙ，Ｍａｓｓａｃｈｕｓｅｔｔｓ．ＵＳＡ）ＷＨＡＴＩＳＲＡＤＡＲＳＹＳＴＥＭＥＮＧＩＮＥＥＲＩＮＧ？Ａｎｏｒｇａｎｉｚａｔｉｏｎｄｅｓｉｒｅｄｔｏ...

简介：Avirtuallabsystemisthesimulationofrealdevicesandexperimentsusingcomputerandnetworktech-nology.Itcanmakeusersdoexperimentseasily,observeexperimentphenomenaandresultsthroughtheremotetermi-nal.Consequently,userscangetfinalresultstoverifyrelativetheory.Thearticleanalysesthefeaturesofvirtuallabsystems.Arealvirtuallabsystemnamed'MultimediaVirtualLabforDigitalCircuitLogicDesign(MVLDCLD)'whichhasbeendevelopedbytheauthorsandtheirgroupisalsopresented.