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任我翱翔 《数字社区&智能家居》2009,(2)
俗话说,“你不理财,财不理你“,很多朋友可能都清楚自己的收入,但却不知道自己的消费和支出,所以每个月下来都是“月光族“。这就是由于头脑中没有“理财“的概念引起的,在新的一年开始时,我们有必要共同来探讨一下个人理财的问题,广义的理财不但包括财产资金的管理,还包括利用现在的资金“生财“,但是由于投资顶目有风险,各行各业差别也很大,因此在市专题中,我们主要探讨狭义的理财,那就是对资金的管理,让账目更明确,让消费更理性,日常生活中不但要开源,更要节流,用心理财,你才能做到“心中有账,手里有财“,从此告别“月光族“! 相似文献
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一个警察玩魔兽,后来殉职,有玩家在游戏里为他组织了葬礼,很多战友前来祭拜。重庆一个魔兽公会的会长在网上卖号,打算凑两三千块钱给妻子治病,结果无数玩家慷慨解囊。还有一些让人哭笑不得的妙人。比如三季稻,人称三哥,他是国服里的一个传奇人物,独来独往,专杀小号。他不参加任何公会,也不参加任何活动,没有人知道他的真实身份。有个联盟玩家给自己的ID起名叫部落不是东西,然后到处躲避部落的追杀,历尽艰辛,乐此不疲。还有一玩家一根筋要当大奸商,不练级,不打怪,只是在不同种族之间倒买倒卖,囤货居奇,最终控制整个服务器的经济命脉。其实,游戏和现实世界一样.不管是谁,总有点追求。在《魔兽世界》里,有人求升级,有人求装备,有人享受打到BOSS的过程,有人追求领导公会的快感,但也有BJ这样的游侠——他最大的乐趣是发掘游戏里面各种稀奇古怪的地方。他会一个人去爬山、游泳、客串做奸商,躲在没人的地方钓鱼,或者和小妹妹在山顶看日出。为了抓一只宠物,他可以在树下连续盯上40多个小时,如痴如醉,跟谈恋爱一样。走出游戏,又觉得自己很傻。BJ今年33岁,是一个程序员,家住南京,有家庭,有事业,热爱生活。 相似文献
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陆文聪 《计算机与应用化学》2007,24(1):I0002-I0002
恩师陈念贻先生虽然永远离开了我们,但是他的音容笑貌,宛如昨日,历历在目。多少个节假日,他还在潜心研究,手不释卷?多少个夜晚,他还在著书立说,修订论文?陈先生一生酷爱科学研究,孜孜以求,不知疲倦。他学识渊博,文采飞扬,语言生动;虚怀若谷,学而不厌,诲人不倦;提携后学,循循善诱,令人感动。陈念贻先生1952年毕业于清华大学化学系,曾任中国科学院上海冶金研究所研究员、博士生导师,“中国科学”、“物理化学学报”编委,中国化学会计算机化学委员会 相似文献
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高楼万丈平地起,在网络化和电子商务的时代,信息系统最重要的基础设施包括各种服务器和终端,以及网络设备等。它们是实现办公自动化的先决条件。有了这些设备,您每天坐在PC前,用鼠标指指点点,就可以完成各种日常工作,远到合作伙伴,近至邻桌同仁,不分时间和地点,可以随时沟通。因此,您的方案和计划,通过服务器,得以准确地展现,通过网络,得以快速地发送,最终得到完美地实现。的确,现代办公让人拥有从未有过的巨大能力,不由您赞叹现代办公的魅力和轻松!IT的发展日新月异,促使您的办公也越来越轻松。下面,让我们走到信息系统的后台,看看里面发生了什么变化。 相似文献
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正2013年蹒跚走远,2014全新驾到,在这除旧迎新的时节里,有太的多事需要我们去做,比如购物,比如给亲友祝福,比如自己的吃喝玩乐,面对它们,我们真的准备好了么?1购物篇,疯狂更要少花钱忙了一年了,谁说不应该趁这个辞旧迎新的日子败败家?不过,购物虽好,精打细算仍很重要,如果花十元钱能买下的东西,你非花一百元买下,那就不是土豪般的潇洒,而是脑袋被驴踢了似的悲哀了。所以买东西时必须要货比三家,此外,有些网店为了能够吸引更多的人气,同时也 相似文献
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Radio frequency identification (RFID) is an emerging non-contact technique where readers read data from or write data to tags by using radio frequency signals. When multiple readers transmit and/or receive signals simultaneously in a dense RFID system, some reader collision problems occur. Typically, in a modern warehouse management system, the warehouse space is partitioned into blocks for storing different goods items on which RFID tags are affixed. The goods items with the equal size are placed in the same block. Because the sizes of goods items are possibly different among blocks, the density values of tags that are affixed on the goods items are different from each other. In this case, tags in each block are distributed randomly and uniformly while tags in the whole warehouse space (i.e., all blocks are considered as a whole) follow a non-uniformly random distribution. For the sake of academic research, this situation is defined as a multiple-density tag distribution. From the viewpoint of resource scheduling, this article establishes an RFID reader-to-reader collision avoidance model with multiple-density tag distribution (R2RCAM-MTD), where the number of queryable tags is used as the evaluation index. Correspondingly, an improved artificial immune network (AINet-MTD) is used as an optimization method to solve R2RCAM-MTD. In the simulation experiments, four cases with different blocks in a warehouse management system are considered as testbeds to evaluate the effectiveness of R2RCAM-MTD and the computational accuracy of AINet-MTD. The effects of time slots and frequency channels are investigated, and some comparative results are obtained from the proposed AINet-MTD algorithm and the other existing algorithms. Further, the identified tags and the operating readers are graphically illustrated. The simulation results indicate that R2RCAM-MTD is effective for reader-to-reader collision problems, and the proposed AINet-MTD algorithm is more efficient in searching the global optimal solution of R2RCAM-MTD than the existing algorithms such as genetic algorithm (RA-GA), particle swarm optimization (PSO), artificial immune network for optimization (opt-aiNet) and artificial immune system for resource allocation (RA-AIS). 相似文献
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Due to the rapid development of globalization, which makes supply chain management more complicated, more companies are applying radio frequency identification (RFID), in warehouse management. The obvious advantages of RFID are its ability to scan at high-speed, its penetration and memory. In addition to recycling, use of a RFID system can also reduce business costs, by indentifying the position of goods and picking carts. This study proposes an artificial immune system (AIS)-based fuzzy neural network (FNN), to learn the relationship between the RFID signals and the picking cart’s position. Since the proposed network has the merits of both AIS and FNN, it is able to avoid falling into the local optimum and possesses a learning capability. The results of the evaluation of the model show that the proposed AIS-based FNN really can predict the picking cart position more precisely than conventional FNN and, unlike an artificial neural network, it is much easier to interpret the training results, since they are in the form of fuzzy IF–THEN rules. 相似文献
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《Computers & Industrial Engineering》2013,64(4):943-956
Due to the rapid development of globalization, which makes supply chain management more complicated, more companies are applying radio frequency identification (RFID), in warehouse management. The obvious advantages of RFID are its ability to scan at high-speed, its penetration and memory. In addition to recycling, use of a RFID system can also reduce business costs, by indentifying the position of goods and picking carts. This study proposes an artificial immune system (AIS)-based fuzzy neural network (FNN), to learn the relationship between the RFID signals and the picking cart’s position. Since the proposed network has the merits of both AIS and FNN, it is able to avoid falling into the local optimum and possesses a learning capability. The results of the evaluation of the model show that the proposed AIS-based FNN really can predict the picking cart position more precisely than conventional FNN and, unlike an artificial neural network, it is much easier to interpret the training results, since they are in the form of fuzzy IF–THEN rules. 相似文献
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液体对超高频电磁波有较强的吸收作用,为减少液体对超高频RFID标签的影响,提出RFID标签在液体类商品表面贴放位置的设计。从理论和数值仿真两方面分析了液体环境对RFID天线性能的影响,提出了标签贴放位置的选择问题。在此基础上,将仿真实验与实际应用相结合,设计了液体类商品仿真模型,将弯折偶极子天线贴放于商品的合理位置,测试标签在该环境下的回波损耗和增益性能。研究结果表明,RFID天线的回波损耗小于-20 dB,天线的增益方向图也显示天线具有良好增益。标签的设计针对实际液体类商品应用场景,标签天线测试结果良好,为RFID标签在液体类商品中的应用提供了解决方案。 相似文献
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针对现有无线射频识别(RFID)认证协议存在的安全缺陷,提出了一种新的轻量级RFID安全认证协议,并基于GNY逻辑给出了形式化证明。协议采用阅读器双重认证及预认证阶段刷新密钥的方法,通过在标签中添加保护密钥同步的恶意攻击标记Tm,解决了当前协议中存在的可扩展性欠佳、标签密钥更新失败导致位置跟踪和非法更新标签/服务器内部密钥造成拒绝服务(DoS)等问题,可抵抗重传、标签/阅读器假冒和通信量分析等多种恶意攻击,尤其防范来自位置隐私泄露和拒绝服务的安全威胁。分析结果表明,所提协议具有低成本、安全性高、计算复杂度低等特点,适合于标签数目较多的RFID系统。 相似文献