Mainboard Function Test System For LCD TV

2014年全球液晶电视出货量超过5000万台，巨大的产能，需要研发、采购、生产、物流的高效合作。 冠捷作为全球4大液晶电视代工厂之首，14年液晶电视出货量700万台，并呈逐年增长之势。一台液晶电视由液晶面板、主控板（以下简称主板）、电源板、按键板、喇叭、外壳等构成，一台电视的产出，经过PCB打板、插件、焊接、ADC调整、组装、白平衡调整、整机检查等环节。 主板作为电视机核心部件，承担了图像、声音编解码，联网等功能。由于零件不可能保证100%良品，并且在插件、波峰焊、ADC调整等生产环节，偶尔也会损坏部分元件，主板器件一旦损坏，将导致电视的功能受到不同程度影响。因此主板产出之后，都经过全面检...In the year 2014, global LCD TV shipment exceed 50 million sets, the huge throughput need Reseatch &Development,Purchase, Manufacture, Logistics cowork efficiently. TPV is Top of four biggest LCD TV OEMs,shipped over 7 million LCD TVs in 2014, and the number is growing year by year. LCD TV is consist of LCD Panel,Main control board (MB in short),Power board, Keyboard,Loud Speaker,Casing. It need...学位：工程硕士院系专业：信息科学与技术学院_工程硕士(电子与通信工程)学号：X201122201

关于华南与东南亚民族考古的几个问题

《关于华南东南亚民族考古的几个问题》是我给厦门大学考古专业硕士生上课时的几段师生对话,内容涉及到华南至东南亚这一跨界区域考古研究的理念、方法、内容、课题等,经硕士生吴梦洋、朱芝兰、马天行等整理后,似自成一章,不妨借《南方文物》一角刊出,供学界进一步批评、讨论

基于一维TiO2纳米管阵列薄膜的β伏特效应研究

介绍了一种采用宽禁带半导体二氧化钛纳米管阵列薄膜材料制备β伏特效应同位素电池的方法.通过对金属钛片的电化学阳极氧化制备了垂直定向、有序排列的二氧化钛纳米管阵列薄膜,研究了退火条件对二氧化钛纳米管阵列薄膜半导体光电性能的影响.通过与镍-63辐射源的集成封装,形成三明治结构镍-63/二氧化钛纳米管阵列薄膜/钛片的β伏特同位素电池.实验结果表明,基于氩气氛围下450?C退火的黑色二氧化钛纳米管阵列薄膜具有高的氧空位缺陷浓度和宽的可见-紫外吸收光谱.在使用β辐射总能量为10 m Ci的镍-63辐射源时,同位素电池的开路电压为1.02 V,短路电流75.52 n A,最大有效转换效率为22.48%.国家自然科学基金(批准号:61574117);;深圳市科技计划项目(批准号:JCYJ20170306141006600)资助的课题~

Feeding ecology of sesarmid crabs in mangroves

相手蟹科物种是红树林湿地的主要底栖动物类群,在生态系统中起着重要的作用。我国大陆地区目前已记录的相手蟹科物种数量为12种,低于其它红树林地区(国内常用的采样方法会造成螃蟹物种数量和密度的低估),其中褶痕相手蟹(SESArMA PlICATA)、无齿相手蟹(S.dEAAnI)和双齿相手蟹(S.bIdEnS)等是常见种。红树植物叶片是相手蟹科动物的主要食物来源,相手蟹科动物通过地表摄食和洞穴贮存的形为消耗了大量的红树植物凋落叶,使这些凋落叶的有机质和营养元素得以保留在生态系统内,在凋落叶的周转和物质归还方面起到重要的作用。它们同时也摄食红树植物的繁殖体并且对不同物种的繁殖体具有摄食偏好,这可能对一些红树物种的植被更新能力和红树植被群落结构产生影响。相手蟹科动物对不同物种和不同状态的红树叶片也存在摄食偏好,通常对腐烂的叶片摄食偏好较强;螃蟹的摄食偏好与叶片的营养成份、粗纤维和单宁含量以及C/n比等性质有关;但在恶劣的野外环境下,螃蟹则会表现出随机性摄食。目前关于相手蟹科动物生态学作用的认识仍不充分,例如它们的种群大小和对凋落物的转化作用等,有待于进一步研究。Sesarmid crabs,common macro invertebrates in mangrove ecosystems,influence the structure and function of mangrove habitats through their burrowing activities and processing of leaf litter.A total of 12 sesarmid species have been recorded in mainland China,which may be an underestimate since more sesarmid species have been reported in Hong Kong and other tropical mangrove regions.( The reason for this underestimation could be due to the method commonly used to locate the crabs within mainland China.The most common method used is to place plot frame on the soil surface and simply dig to about 20—30 cm,and sift through the soil to locate crabs which could allow sesarmid crabs to escape deeper into the soil during the digging.) The most common sesarmid species in China are Sesarma plicata,S.deaani and S.bidens,while Neosarmatium meinerti is widely recorded in tropical areas of Australia and Kenya.Mangrove plant tissues,mainly leaves,are the main food source of sesarmid crabs,but crabs also feed on sediment detritus and faunal tissue to supplement the nutrient limited mangrove leaves.Some dietary specializations among different mangrove crabs have been recognized.Some crabs feed on only live leaves obtained by climbing into trees,while some species feed only on dead leaves on the mangrove floor.Crabs also have frequently been observed burying fallen mangrove leaves,to enhance leaf nutrition quality,prevent leaf litter from being removed by tidal flushing and avoid competition and predation when food or time available for collectingfood is limited,and predator abundance is high.The feeding preference of sesarmid crabs for mangrove leaves with different conditions or from different mangrove species also has been reported from the laboratory and the field research.For example,sesarmid crabs in China prefer leaves of Kandelia candel over those of Bruguiera gymnorrhiza and Aegiceras corniculatum.Leaf characteristics such as C /N ratio,tannin,water and crude fiber contents determine the feeding preferences.Generally,sesarmid crabs prefer decomposed leaves,ascribed to the decreased tannin content and C /N ratio,and increases in water during leaf decomposition.It also has been suggested that crabs need to consume more decomposed leaves to obtain adequate C and N since they have lower C and N assimilation rates from those leaves.Feeding preferences have been more often demonstrated in laboratory studies while some field studies have revealed a lack of selective feeding of different mangrove species.This is probably due to the environmental stresses in field like predation,limited feeding time,and limited food availability.The ability of sesarmid crabs to remove leaf litter has been studied frequently in the past decades,and crabs have been shown to consume a large proportion of annual leaf fall production,far in excess of the local production in some mangrove forests.The ability of crabs to remove litter seems to be stronger in tropical areas than in subtropical or warm temperate areas.In subtropical areas like China,removal of leaf litter is affected by temperature and showed significant seasonal variation.Not only sesarmid crabs but some snails( e.g.Terebralia palustris) and ocypodoid /grapsid crabs( e.g.Helograpsus haswellianus and Ucides cordatus) also have been reported to consume mangrove leaves.Direct grazing of leaf litter by crabs accounts for a small proportion of leaf litter removed from mangrove floor in China,while the stocking of leaves in crab burrows for later consumption is the key way by which leaf litter is retained in the ecosystem,preventing tidal export.Through shredding and grazing of leaf litter,crabs also initiate and enhance the breakdown of mangrove detritus and recycling of nutrients.Sesarmid crabs also have been found to graze mangrove propagules and seeds,thus play a critical role in determining seedling recruitment and vegetation regeneration.It also has been suggested that the predation preference on some non-dominant mangrove species regulates their distribution with the vegetation community.The feeding ecology of sesarmid crabs and its involvement of in mangrove restoration,their retention of C and nutrients in mangrove soils and predation of seeds /propagulse are worthy further studies.国家自然科学基金项目(41206108;41076049); 福建省自然科学基金项目(2011J05111); 海洋公益性行业科研专项项目(201205008

Pinhole detection method for sealed package

本发明涉及一种食品、医疗用品等需完全密封包装的物品的针孔检测方法。将由绝缘材料包装包裹的导电物放置在一对检测电极的正下方；一检测电极通过导线与高压电源的正极相连，另一检测电极通过导线接入电流检测装置后接地；两检测电极水平摆放，相互间隔一定距离，该距离能够防止两电极由于高压击穿空气而导致短路；两电极的不锈钢珠链与密封包装物的绝缘材料包装表面接触；高压电源通过检测电极对密封包装物施加高压电，使密封包装物充电；针孔检测；交换两检测电极的极性，针孔检测。本发明能够实现对密封包装产品的高速在线无损针孔检测，可以检测出直径小于0.5μm的微小针孔，精度极高

Charging control cabinet based on on-site bus

本发明公开了一种基于现场总线的收费控制柜,由柜体,柜门,底座三部分组成。柜体内包括:车道控制器,与CAN总线智能控制装置相连,并与字符叠加器连接;CAN总线智能控制装置与车道设备通讯,并与多路控制连接器、开关电源电连接;端子排与多路控制连接器连接,并与避雷器连接;总线智能控制装置由配有看门狗的微处理器、CAN总线控制器、CAN总线收发器、RS232信号收发器、第一光耦隔离器、第二光耦隔离器、反相器和达林顿管组成;其特点是:防尘、防震、抗干扰,设计结构合理,安装维护方便,运行安全可靠并能满足系统升级需要

Electron charge display for weighting and charging

本实用新型涉及一种计重收费电子费额显示器,包括控制电路及显示屏,所述控制电路与收费计算机进行数据通讯,控制电路的输出端与显示屏相连,该显示屏由LED点阵模块形成;所述控制电路具有单片机,其通过电平转换器与收费计算机进行数据通讯,单片机的行控制输出端经译码器及功率放大器接至LED点阵模块的共阳极,单片机的列控制输出端经驱动器、锁存器与LED点阵模块的共阴极相连;所述功率放大器为三极管;单片机的复位端及输出端还接有看门狗。本实用新型显示内容丰富,可以实时显示车型、检测到的车重量及相应的收费金额等文字、数字、字符或图形等各种信息,可实现静态显示、上下移动显示和左右移动显示,显示清晰,效果美观,使用寿命长

Ground characteristics detecting device used for snake shaped robot

本发明涉及机器人研究和工程领域,具体是一种用于蛇形机器人的地面特性检测装置。它具安装蛇头模块内,包括壳体、压力传感器、压杆、触头,其中压力传感器安装在壳体内,压杆活动安装在壳体内部;触头安在压杆的底部;压力传感器的输出信号与地面特性检测电路电连接。本发明作为一个独立的机构,采用压力传感器直接测量地面的正压力和侧向摩擦力,可以定量地给出地面特性,测量参数多。检测装置调试简单、结构简单、集成度高、易于加工制造。另外,外壳的设计使检测装置与蛇形机器人安装方便

四氯化钛精致尾渣制备钒酸铁的研究

对四氯化钛精致尾渣进行酸浸,考察液固比、盐酸用量、浸出温度、浸出时间对钒浸出率的影响,结果表明,在液固比2∶1、38%盐酸与水的体积比1.1∶1、浸出温度40℃、浸出时间30min的条件下,钒浸出率可以达到97.1%。酸浸液调节pH后,在沉钒温度40℃、酸浸液钒初始浓度小于6g/L、终点pH1.4~2.0、氧化剂用量为理论量的5~6倍的条件下,钒沉淀率达到95.4%,沉淀物550℃煅烧3h后可以得到钒酸铁。沉钒渣和废水中和渣满足GB18599—2001中一般工业固体废物永久堆放的要求

Ground property tester for snake shape robot

本实用新型涉及机器人研究和工程领域,具体是一种蛇形机器人地面特性检测装置。它具安装蛇头模块内,包括壳体、压力传感器、压杆、触头,其中压力传感器安装在壳体内,压杆活动安装在壳体内部;触头安在压杆的底部;压力传感器的输出信号与地面特性检测电路电连接。本实用新型作为一个独立的机构,采用压力传感器直接测量地面的正压力和侧向摩擦力,可以定量地给出地面特性,测量参数多。检测装置调试简单、结构简单、集成度高、易于加工制造。另外,外壳的设计使检测装置与蛇形机器人安装方便