Probe on Network-based Collaborative Maintenance Model for After-sales Equipment

In order to make equipment run safely, economically and continuously, some new maintenance models were put forward to improve the equipment after-sale maintenance service, such as E-maintenance, third-party maintenance, etc. To certain extent, the models solved the problem of the distance between the manufacturer and customer and the dispersion of the maintenance technologies, however, those resources are still widely distributed and do not collaborate efficiently. In this paper, a network-based collaborative maintenance service model was proposed for after-sales equipment to solve the problem of maintenance resources integration. Concretely, equipment designers, maintainers, spare parts suppliers and maintenance experts were grouped together to establish dynamic alliance. The leader of the alliance is the manufacturer under guaranty period or equipment user exceeding the guaranty period. The process of maintenance service was divided into three stages which are fault diagnosis, maintenance decision and maintenance implementation. The sub-alliances were established to carry out maintenance work at each stage. In addition, the business process of network-based collaborative maintenance was analyzed and collaborative business system for equipment＇s after-sales collaborative maintenance service was designed. In the end, an informational economics model of network-based collaborative maintenance was established to demonstrate the effectiveness of this maintenance model.

Particle reworking by the sediment-living polychaetes Perinereis aibuhitensis

The infaunal polychaete Perinereis aibuhitensis Grube, distributes widelyalong Asian coasts and estuaries. In this research the particle reworking function of P.aibuhitensis was investigated in Beitang Estuary, Tianjin. The result showed that P.aibuhitensis displayed significant particle mixing function, in which small grain sizesediment particles were mixed more than the large size ones. Some small grain sizesediment particles could be ingested by P. aibuhitensis and egested with fecal pellets.

Neoproterozoic Crustal Reworking and Growth in the Zhangbaling Uplift, Tan-Lu Fault Zone: Evidence from the Feidong Complex and Zhangbaling Group

Intensive mid-Neoproterozoic magmatism is the salient feature of the Yangtze Block,preserving abundant information about crustal reworking and growth.Zircon U-Pb-Lu-Hf isotope analysis was performed on material from the Feidong Complex(FDC)and Zhangbaling Group(ZBLG)of the Zhangbaling Uplift,in order to determine the age and magmatic source of the Neoproterozoic igneous rocks as well as the detrital provenance for the sedimentary rocks,to further provide important data for understanding the mid-Neoproterozoic crustal evolution of the Northeast Yangtze Block.The amphibolite and gneissic granites in the Feidong Complex(FDC)gave similar protolith ages of 782-776 Ma.The synmagmatic zircons exhibited variable negativeεHf(t)values of-26.9 to-8.3.Early(ca.2.4 Ga)to late Paleoproterozoic(ca.2.0-1.9 Ga)inherited zircons were found in the gneissic monzogranite,with negativeεHf(t)values of-11.2 to-7.2,indicating strong reworking of the ancient crustal materials of the Northeast Yangtze Block.Whereas the amphibolites represent minor crustal growth through emplacement of continental rifting-related mafic magmas.The quartz-keratophyres in the Xileng Formation of the ZBLG in contrast systematically yield young protolith crystallization ages of 754-727 Ma with highεHf(t)values of-2.0 to+5.6,indicating their derivation from the reworking of juvenile crustal materials.The detrital zircons from the metasiltstone in the Beijiangjun Formation yield variable^(206)Pb/^(238)U ages(871-644 Ma)with a peak age at 741±11 Ma andεHf(t)values of-4.3 to+5.3,which is consistent with those of the Xileng Formation,but distinct from the FDC,indicating that the provenance of the metasiltstone is primarily the underlying Xileng Formation.The mid-Neoproterozoic igneous and sedimentary rocks of the Zhangbaling Uplift were products from continental rifting zones along the northern margin of the Yangtze Block,situated in different positions from the Susong Complex and the Haizhou Group.The transition from ancient to juvenile crustal sources for felsic magmatic rocks is attributed to gradually increased crustal extension during continental rifting.

The Main Geochemical Biological and Reworking Metallogenic Models of the Lanmuchang Independent Tl Deposit

Thallium (Tl) is a dispersed element and it seldom occurs in the form of independent minerals. So the element is hard to form any independent deposit. The world annual production of Tl is about 13 ton, most of which is recovered as by\|product from non\|ferrous metal metallurgical products. Reported in this paper is the only large\|sized independent Tl deposit in the world, of which the Tl ores can be mined, ore\|dressed and smelted independently. Bio\|enrichment and hydrothermal reworking are the two important metallogenic mechanisms of this Tl deposit. This paper will give a discussion to the Lanmuchang Tl deposit in the following respects including its geological characteristics, element association of Tl, Hg, As and Au and W, sulfur isotopic composition, involvement of hallogens in metallogenesis and the metallogenic models.

Strength May Lie in Numbers: Intertidal Foraminifera Non-Negligible Contribution to Surface Sediment Reworking

The contribution of benthic foraminifera to sediment bioturbation has widely been overlooked despite their huge abundance in intertidal soft sediments. In this preliminary study, we specifically chose to focus on two key species of benthic foraminifera in temperate intertidal mudflats, Quinqueloculina seminula and Ammonia tepida, and first experimentally investigated their individual movements at the sediment surface. We subsequently derived from these observations the individual-level surface sediment reworking rates, and used the actual abundance of these species to extrapolate these rates at the population level. Individual surface sediment reworking rates SSRRi ranged between 0.13 and 0.32 cm2·ind-1·day-1 for Q. seminula, and between 0.12 and 0.28 cm2·ind-1·day-1 for A. tepida. Population-level surface sediment reworking rates were subsequently estimated as ranging between 11,484 and 28,710 cm2·m-2·day-1 for Q. seminula and 27,876 and 65,044 cm2·m-2·day-1 for A. tepida. Noticeably, these reworking rates are comparable to, and eventually even higher than, the rates reported in the literature for populations of intertidal macro-invertebrates, such as the annelid polychaete Melinna palmata and the bivalve Abra ovata. Taken together these results suggest that despite their minute size intertidal benthic foraminifera are, thanks to their abundance, non-negligible contributors to the reworking of surface sediment, and may then play an unanticipated role in the benthic ecosystem functioning, through e.g. the enhancement of fluxes at the sediment-water interface.

Synergic Effect of Reworking for Imperfect Quality Items with the Integration of Multi-Period Delay-in-Payment and Partial Backordering in Global Supply Chains

In intercontinental trade and economics goods are bought from a global supplier.On occasion,the expected lot may include a fraction of defective items.These imperfect items still have worth and can be sold to customers after repair.It is cost-effective and sustainable to rework such items in nearby repair workshops rather than return them.The reworked items can be returned from the workshop to the buyer when shortages are equal to the quantity of imperfect items.In the meantime,the supplier correspondingly deals a multi-period delay-in-payments strategy with purchaser.The entire profit has been maximized with paybacks for interim financing.This study aims to develop a synergic inventory model to get the most profit by making an allowance for reworking,multi-period delay-in-payments policy,and shortages.The findings of the proposed model augment inventory management performance by monitoring cycle time as well as fraction of phase with optimistic inventory for a supply chain.The results demonstrate that profit is smaller if the permitted period given by supplier to buyer is equal to or greater than the cycle time,and profit is greater if the permitted period is smaller than the cycle time.The algebraic method is engaged to make a closed system optimum solution.The mathematical experiment of this study is constructed to provide management insights and tangible practices.

3M Strengthening After-sales Service

The rapid rise and development of the computer industry in China has promoted the production of and demand for computer diskettes. China, with over 30 diskette production lines and an annual production of 2 billion diskettes, including some for export, has become the biggest diskette producing country in the world. However, imported diskettes, especially high grade brands, enjoy a good market here. That’s why many world renowned diskette

Value Creation for the After-Sales Services： Organizational and Strategic Perspectives

As a part of the product development process, the after-sales services are not only a source of innovation, but also they benefit from value creation through new managerial methodologies for the achievement of competitive advantage and customer satisfaction. The objective of the paper is to further understand value creation for the after-sales services. We present the case of the creation of a new business for the after-sales services for the entrance into a new market. The new business is created by two gurus in the aerospace industry. A typology of guidelines is derived, based on organizational and strategic perspectives, for the after-sales services value creation and the guidelines for the creation of a new business as well as for the entrance of into a new market are presented.

Reworking Intensity—A Key Factor Leading to the Formation of Superlarge Gold Deposits in Greenstone Belts and Metamorphosed Microclastic Rocks in China

The greenstone belt and metamorphosed microclastic rock\|type superlarge gold deposits in China are hosted in metamorphic rocks and later intrusive bodies. Sedimentation, regional metamorphism and mineralization contributed a lot to the formation of the deposits, so did remelting magmatic process to some deposits, but the deposits were finally formed by reworking processes. The key factor leading to the formation of superlarge gold deposits is the reworking intensity, which for superlarge gold deposits is reflected by the large\|scale reworked source rocks and even ore materials of various sources, strongly oxidized ore\|forming fluids with a long and repeated active history and stable geothermal heat current. The factor which decides the reworking intensity is the network consisting of structures of different classes.

Crustal Accretion and Reworking within the Khanka Massif: Evidence from Zircon Hf Isotopes of Phanerozoic Granitoids

The Central Asian Orogenic Belt（CAOB）is one of the largest Phanerozoic accretionary orogen.（Windley et al.,1990,2007;Jahn et al.,2000a,b,c;Yakubchuk,2002,2004;Xiao et al.,2003,2004）.It is the optimal study area for revealing the accretion and reworking processes of the continental crust.The Khanka Massif is located in the most eastern part of the CAOB,and mainly crops out in the territory of Russia,with a small segment in NE China.In addition,a large number of multi-stage granitic rocks are formed in geological evolution in this area,recording amounts of information about crustal accretion and reworking processes（De Paolo et al.,1991;Rudnick,1995;Wu et al.,2011）.In view of this,this paper uses the spatial-temporal variations of trace elements and zircon Hf isotopic compositions of phanerozoic granitoids within the Khanka Massif as a case to reveal the crustal accretion and reworking processes of micro continental massifs from the orogenic belt,further to understand the formation and evolution processes and mechanisms of the global continental crust.According to the statistics of zircon U-Pb ages of granitoids in the Khanka Massif,indicate that the granitic magmatisms in the Khanka Massif have eleven peaks:492 Ma,460 Ma,445Ma,430Ma,425Ma,302Ma,287Ma,258Ma,249 Ma,216Ma and 213Ma,it can be divided into eight main stages:Late Cambrian,Middle-Late Ordovician,Middle Silurian,Late Carboniferous,EarlyPermian,Middle-Late Permian—Early Triassic,Late Triassic-Early Jurassic,Early Cretaceous.The Phanerozoic granitoids in Khanka massif are selectedinthispaperasasuiteof granodiorite-monzogranite-syenogranite.TheSi O2contents of the Phanerozoic granitoids exceed 65%,and has high Al2O3,low Mg#,TFe2O3,Cr,Co and Ni contents.This suggests that mixture with mantle-derived magma did not occur,and it should be a typical crustal source（Lu and Xu,2011）.Combined with evident characteristics of light rare-earth elements（LREEs）and large ion lithophile elements（LILEs）enrichment,and heavy rare-earth elements（HREEs）and high field-strength elements（HFSEs）loss,we suggest that the primary magma was derived by partial melting of lower crustal material（Xu et al.,2009）,and geochemical properties of the Phanerozoic granitoids essentially reflect the nature of the magmatic source region.According to the temporal variation of zircon Hf isotopic data of Phanerozoic granitioids,zircon Hf isotopic compositions of Phanerozoic granitoids have a obvious correlation with age.With the decrease of formation time ofthePhanerozoicgranitoids（Late Cambrian;iddle-LateOrdovician;iddle Silurian;arlyPermian;iddle-LatePermian–Early Triassic;ate Triassic-Early Jurassic）,εHf（t）values of zircons gradually increase,whereas their TDM2 ages gradually decrease（Paleoproterozoic–Neoproterozoic）,suggesting that the generation of granitic magmas from the Khanka Massif could have experienced the change from the melting of the ancient crust to the juvenile crust during Paleozoic to Mesozoic.According to the sample location,it can be found thatεHf（t）values of Phanerozoic granitoids have the tendency to decrease with latitude increase,showing that components of the ancient continental crust gradually increase from south to north.However,at the same latitude range,theεHf（t）values of Phanerozoic granitoids also inconsistent.Taken together,these differences reveal the horizontal and vertical heterogeneity of the lower continental crust within the Khanka Massif.According to the relative probability of two-stage model（TDM2）ages of zircon Hf isotope from Phanerozoic granitoids within the Khanka massif,it could be divided into three stages:（1）Late Paleoproterozoic（2）Mesoproterozoic（3）Neoproterozoic.It reveals that the main part of the continental crust within the Khanka MassifwereformedinLate Paleoproterozoic–Neoproterozoic.The Phanerozoic granitoids in the Khanka Massif reworked from the source rockswithdifferent ages（Paleoproterozoic–Mesoproterozoic–Neoproterozoic）.

Geology and Geochemistry of Reworking GoldDeposits in Intrusive Rocks of China──Ⅱ.Gold Deposits and Their Genesis

Gold deposits in intrusive masses include the veinlet dissemination, quartz vein andveinlet dissemination + vein types . They are distributed in fracture zones along the endocontact zone of a batholith or in the centre and edge of a stock. The metallogenic epochs are Yenshanian, Hercynian, Archean, Proteredc and Himalaysn. The gold deposits are characterizedby a big difference in time span between gold mineralization and the formation of host masses.Ore-forming materials were derived from the masses and auriferous strata and ore-forming fluidscame from meteoric and formation waters. When circulating water was heated by ascendingheat flow, gold would be extracted, concentrated and transported from auriferous rocks andthen precipitated in the masses during the late tectonic movement. Finally gold deceits wereformed in the intrusive masses.

Geology and Geochemistry of Reworking Gold Deposits in Intrusive Rocks of China-I.Features of the Intrusive Rocks

Most gold deposits in intrusive rocks were formed as a result of reworking processes.The intrusive rocks containing gold deposits and consisting of ultramafic-mafic, intermediate-acid and alkaline rocks of the Archean, Proterozoic, Caledonian, Hercynian and Yenshanian periods occur in cratons, activated zones of cratons and fold belts. Among them, ultramafic-mafic rocks, diorite, alkaline rocks, and anorthosite are products of remelting in the mantle or mantle-crust or mantle with crustal contamination. However, auriferous intermediate-acid rocks are products of metasomatic-remelting in auriferous volcanic rocks or auriferous volcano-sedimentary rocks in the deep crust.

极简主义视觉艺术和音乐在新媒体上的跨媒介互动——以App REWORK为例

20世纪六七十年代,极简主义的出场,深远影响到了许多艺术领域。极简主义视觉艺术和极简主义音乐在“少即是多”“重构与解构”“重复性”方面有着共同的美学特征,为二者的结合提供了理论基础。近年来,App REWORK从“音乐与色彩”“运动与节奏”“音乐层次与空间”三个方面,使极简主义视觉艺术与极简主义音乐实现了新媒体上的跨媒介互动,为视听跨媒介互动提供了实践依据。App REWORK为极简主义视觉艺术和音乐在新媒体上跨媒介互动体验系统提供了实践范例,为用户在新媒体视听互动创作系统提供了典范;有利于音乐的推广和提升用户的参与度,也为其他风格的视觉艺术与音乐互动提供了可能。

考虑质量传导的项目调度与人员配置集成优化

研究表明,质量问题是项目返工的主要原因之一,而人员技能水平是影响项目活动完成质量的关键因素。基于一般性的多技能资源受限项目调度问题,综合考虑人员技能水平以及活动间质量传导作用对活动完成质量的影响,进一步数学表达级联作用下的返工子网以及重构的项目网络,并结合一个大型船舶制造项目案例进行实验分析。对比实验结果表明:所提出的模型可有效平衡有限人力资源在不同活动间的分配,有利于减少返工风险的级联,缩短项目总工期。进一步,通过质量评估区间和人员技能水平参数波动的随机实验,验证模型对两类参数波动具有一定的鲁棒性。

基于ReWorks的内存日志服务设计与优化

传统的文件系统日志服务无法满足嵌入式系统异常记录的实时性需求。在国产ReWorks嵌入式实时操作系统中设计实现了一种基于内存的日志服务,通过记录异常信息到日志内存中,在热重启后仍然可以从内存中获取复位前所记录的系统异常日志信息。通过在国产FT2000A/2硬件平台的验证和分析,对其实时性和可用性实现了进一步优化。测试数据表明,内存日志服务记录一条完整异常信息到内存日志平均耗时约为文件日志的0.5%,内存文件系统的写性能近270 MB/s,是SSD硬盘文件系统的6倍,具有高实时性、热重启不丢失、非阻塞等特性,对实时系统的异常分析定位与故障统计排查提供了有力支撑。

考虑随机返工与紧急插单的可抢占设计项目群调度

鉴于多项目并行以及因随机返工和紧急插单而导致的任务抢占特征,使设计项目群调度问题难以求解,而传统随机动态规划方法因维数灾难只能获得小规模问题的最优策略,为构造面向大规模问题的高效近似方法,提出将原随机调度问题近似分解为各个状态下的确定性调度子问题,从而获得原问题的次优策略。建立了确定性调度子问题的混合整数规划模型,并提出基于元启发式算法和优先规则的求解方法。基于标准测试集PSPLIB设计了多组计算实验,在不同调度环境下验证了所构建模型和算法的有效性。实验结果表明,元启发式算法不但在单项目平均拖期比目标下较最优规则提升了12%以上,而且具有较高的计算效率,能够满足实际决策需求。

深海重力流与底流交互作用的沉积响应及其勘探意义

顺坡而下的重力流(浊流)与沿坡流动的底流(等深流)之间的交互作用是当前国际沉积学研究的前沿领域与薄弱环节,交互作用沉积体系及其沉积特征相较于重力流或等深流沉积体系仍“知之甚少”。本文总结了论文作者所识别的两种典型交互作用沉积体系的形态特征、沉积特征与沉积样式,查明了交互作用成因优质储层的识别标志与分布模式。深水单向迁移水道具有不对称的剖面形态与持续稳定向陡岸一侧迁移叠加的沉积样式,可进一步分为迁移方向与参与其建造底流流向相同(顺向迁移)和相反(反向迁移)两种类型;深水单向迁移朵叶具有长轴方向与区域等深线平行的形态特征以及侧向迁移延伸方向与区域等深线一致的沉积样式。重力流(浊流)与底流(等深流)交互作用所形成的底流改造砂/交互作用砂具有与浊积砂迥异的沉积特征,如富含有孔虫和生物骨骼,无年龄倒序现象出现,突变非侵蚀接触顶界面,含有大洋水团所伴生的底栖有孔虫,可见牵引流沉积特征(如两到三段式累积概率分布特征、单峰正态的频率分布特征和位于C-M图牵引流沉积区等),这些沉积特征可作为底流改造砂的识别相标志。在剖面上,底流改造砂总是向水道迁移一侧不断迁移叠加,具有“单向叠加、有序展布”的分布模式;在平面上,底流改造砂总是沿区域等深线侧向迁移,具有“单向偏移、侧向叠置”的分布模式;时空上形成连续性好、分布范围广、面积大的超大型优质深水油气储集体。

ReWorks嵌入式操作系统在船舶PMS上的应用

随着计算机技术的迅猛发展和船舶自动化水平的不断提高,对船舶PMS的实时性、可靠性要求也越来越高.论文介绍了船舶PMS研究现状和嵌入式操作系统的特点,构建了一种基于ReWorks嵌入式操作系统的船舶PMS,这样的系统更为安全、可靠,对于船舶自动化发展有着更为深远的意义.

基于儿童视觉认知特点的烟花产品包装设计研究

烟花是节日庆典中深受儿童喜爱的娱乐产品,但当前烟花包装设计在满足儿童视觉认知需求方面存在不足。通过问卷调查、市场调研等形式总结,基于儿童视觉认知特点的烟花包装设计原则,打造系列化、趣味性、安全性的儿童烟花包装设计,为行业发展提供参考。

热交换器泄漏的原因分析及返修措施

以某项目的热交换器为例,对热交换器泄漏的原因进行了分析,根据设备的结构和现场检查情况,给出了合适的返修措施,提出了对类似设备设计制造的优化建议。