Research & Application of Fuzzy Algorithm Based on

模糊控制器的设计不需要建立精确的数学模型，具有很好的鲁棒性，但是模糊控制器的设计中存在两个瓶颈问题：模糊变量隶属函数的确定和模糊规则的合理选取。进化规划避开了问题的数学复杂性，具有强大的数据挖掘能力，求解问题所需的信息比传统优化方法要少的多，并且更容易得到全局最优解。将两者结合能起到取长补短、各显优势的效果。本文主要是用进化算法来解决与模糊系统相关的优化模糊集合的隶属函数或模糊规则，并将该算法应用于T-S模糊模型辨识和PID参数自调整控制中。论文的主要内容可概括如下：1.为解决非线性系统模型难以建立这一问题，本文采用建立系统模糊模型的方法，将三阶结构式的进化规划用于T-S模糊模型的辨识，直接确...Without building the exact math model, the design of the fuzzy controller has a nice robustness. But in designing a fuzzy model and a fuzzy controller, we encounter a major difficulty in the identification of an optimized fuzzy rule base, which is traditional achieved by a tedious trial and error process. The thesis presents an approach to automatic design of optimal fuzzy rule bases for modeling ...学位：工学硕士院系专业：信息科学与技术学院自动化系_系统工程学号：20033103

Structure analysis of anode flow field of micro direct methanol fuel cell based on Fluent

微型直接甲醇燃料电池中阳极流场结构对电池的性能有着重要的影响。为了合理设计阳极流场结构,改善甲醇燃料在阳极流场中的分布,采用计算流体动力学(Cfd)软件fluEnT对微型直接甲醇燃料电池进行建模并仿真分析。分析比较了点型、平行和蛇形3种不同流场图案下得到的压降与流速分布,得出蛇形流场能够更有利于甲醇燃料的均匀分配。在此基础上分别建立不同流道宽度(800,400,200,100μM)的蛇形流场模型,通过仿真计算甲醇燃料的分布情况来分析其对燃料电池性能的影响,并结合实验结果进行对比得出流道宽度为200~400μM之间为优化值。Structure of anode flow field is very important for micro direct methanol fuel cell.To optimize the structure of the anode flow field and the distribution of methanol in it,a model of micro direct methanol fuel cell is created and analyzed by using the computational fluid dynamics(CFD) software.The influence of flow field shapes of grid,parallel and serpentine are analyzed and the pressure drop and velocity distribution in the three kinds of flow fields are studied.It shows that the flow field of serpentine is the best for the even distribution of fuel.Based on this,serpentine flow field models with different width(800,400,200 and 100 μm) are created.Simulations are taken to analyze the influence of distribution to cell performance and compared with experimental results,it shows that the optimal value of flow channel width is 200 ~400 μm.国家自然科学基金重点资助项目(60936003

[[alternative]]Technology construction mechanisms for improving end-to-end delay and throughput for ZigBee wireless networks

碩士[[abstract]]物聯網即透過特定的網路技術，使普通物品實體之間能夠相互溝通的網路。物聯網在運輸和物流領域、健康醫療領域範圍、智慧環境（家庭、辦公、工廠）領域以及個人領域等，具有十分廣闊的市場和應用前景。ZigBee是位於物聯網中一種重要的通訊技術。隨著物聯網發展，網路中裝置的越來越多，為滿足需求IETF工作小組提出構建在IEEE802.15.4網路基礎上，支持IPv6資料轉換與傳輸6 LoWPAN協議(IEEE 802.15.4e)。IEEE 802.15.4e的MAC Behavior中，應用範圍最廣的是TSCH模式。TSCH模式支持多頻道的傳輸來提高網路的吞吐量，但協議中並沒有有效的方法來避免裝置之間的資料碰撞，多跳結構時資料的傳輸延遲將異常高。本論文提出一種行之有效的機制，在提高網路吞吐量的同時，避免碰撞、降低網路的平均端到端延遲。實驗模擬顯示，本論文提出的機制將有效提高TSCH網路的吞吐量，降低網路中裝置的端到端延遲。[[abstract]]The Internet of Things (IoTs) has obtained much attention recent years. The internet of things (IoTs) is the internetworking of physical devices, vehicles, buildings and other items—embedded with electronics, software, sensors, actuators, and network connectivity that enable these objects to collect and exchange data. IoTs is already used in many application domains, ranging from traditional environmental monitoring and location/tracking applications to industrial and healthcare applications. ZigBee is an IEEE 802.15.4-based specification for a suite of high-level communication protocols used to create personal area networks with small, low-power digital radios It is follow with breathless interest because of its energy saving and convenient networking. On February 6, the IEEE Standards Association Board approved the IEEE 802.15.4e MAC Enhancement Standard document for existing standard 802.15.4. TSCH is one of the access behavior modes defined in the IEEE 802.15.4e standard. It combines time slotted access with multi-channel and channel hopping capabilities, providing predictable latency, high network capacity, and high communication reliability. But TSCH doesn’t provide a reliable mechanism to avoiding the packet collision. The packet collision will cause the network throughput reduction and the Average End-to-End addition. So in this paper, we will approve a mechanism to solving the problem. We evaluate its performance, through analysis and simulation, in terms of the network throughput and the Average End-to-End delay. We found that the mechanism will void the packet collision, so that it can raise the network throughput and reduce the Average End-to-End delay.[[tableofcontents]]目錄 圖目錄-----------------------------------------------------------------------------Ⅵ 表目錄-----------------------------------------------------------------------------Ⅷ 第一章、緒論---------------------------------------------------------------------1 1.1 簡介---------------------------------------------------------------------1 1.2 背景知識---------------------------------------------------------------4 1.3 TSCH模式------------------------------------------------------------5 1.3.1 網路的組網-------------------------------------------------------5 1.3.2 裝置之間的資料傳輸-------------------------------------------6 1.3.3 TSCH模式下的問題--------------------------------------------8 第二章、網路環境與問題描述----------------------------------------------11 2.1 網路場景--------------------------------------------------------------11 2.2 問題描述--------------------------------------------------------------11 2.3 網路限制--------------------------------------------------------------14 2.3.1 干擾限制---------------------------------------------------------14 2.3.2 碰撞限制---------------------------------------------------------15 2.3.3 狀態限制---------------------------------------------------------15 2.3.4 傳輸限制---------------------------------------------------------15 2.3.5 資料量限制------------------------------------------------------16 第三章、最大化吞吐量降低平均端到端延遲機制----------------------17 3.1 符號與計算-----------------------------------------------------------17 3.1.1 裝置的頻道干擾----------------------------------------------18 3.1.2 裝置的頻道狀態-----------------------------------------------18 3.1.3 裝置的工作狀態-----------------------------------------------18 3.1.4 裝置接收資料的干擾-----------------------------------------18 3.1.5 裝置發送資料的干擾-----------------------------------------20 3.1.6 link受到與造成的干擾--------------------------------------21 3.2 網路構建-------------------------------------------------------------22 3.2.1 EB廣播---------------------------------------------------------22 3.2.2 link建立--------------------------------------------------------24 3.3 時槽分配-------------------------------------------------------------28 第四章、實驗與仿真-------------------------------------------------------------32 4.1 場景參數-------------------------------------------------------------32 4.2 資料傳輸成功率-------------------------------------------33 4.3 網路的資料傳輸量-------------------------------------------------34 4.4 網路的平均端到端延遲-------------------------------------------36 第五章、結論-------------------------------------------------------------------37 參考文獻--------------------------------------------------------------------------38 附錄-英文論文-------------------------------------------------------------------41 圖目錄 圖1、物聯網三層構架----------------------------------------------------------2 圖2、6TiSCH網路構架---------------------------------------------------------3 圖3、Multi-Slotframe的構架-----------------------------------------------6 圖4、TSCH模式中的link-----------------------------------------------------6 圖5、TSCH模式中的資料傳輸-----------------------------------------------7 圖6、TSCH模式中的cell結構-----------------------------------------------9 圖7、WiFi網路對ZigBee網路的干擾------------------------------------10 圖8、Shared link模式中的碰撞---------------------------------------------11 圖9、Multi-Slotframe結構圖---------------------------------------------------19 圖10、〖矩陣Φ〗_3 ^Rece---------------------------------------------------------------20 圖11、〖矩陣Φ〗_3 ^Send---------------------------------------------------------------21 圖12、網路結構圖-------------------------------------------------------------23 圖13、Multi-Slotframe結構圖-----------------------------------------------23 圖14、〖矩陣Φ〗_1 ^Rece---------------------------------------------------------------26 圖15、〖矩陣Φ〗_3 ^Send---------------------------------------------------------------27 圖16、〖矩陣Φ〗_(3→1)^(x, q)---------------------------------------------------------------27 圖17、Multi-Slotframe結構圖------------------------------------------------28 圖18、多個鄰居請求時槽分配-----------------------------------------------30 圖19、Multi-Slotframe結構圖------------------------------------------------31 圖20、網路中裝置分佈示意圖-----------------------------------------------33 圖21、一步鄰居的數量對資料傳輸成功率的影響-----------------------34 圖22、網路的資料傳輸量-----------------------------------------------------35 圖23、40個時槽網路的資料傳輸量----------------------------------------35 圖24、網路的平均端到端延遲----------------------------------------------36 表目錄 表1、符號表----------------------------------------------------------------------12 表2、網路參數-------------------------------------------------------------------32[[note]]學號: 601411456, 學年度: 10

An expression of truthfulness of desire from heart: On genre of Duras's Lover and Lover from North of China

探讨杜拉斯《情人》和《来自中国北方的情人》两部作品的叙事体裁。这两部作品既非作者自传,也非一般小说,而是一种具有浓厚自传意味和小说色彩、又兼有其他文艺体裁因素的新型叙事作品。读者在其中可以窥见当今各种文学、艺术乃至各个学科之间相互渗透、相互据有的种种多元现象,而这一切皆服务于表现心灵欲望的真实这样一个主题

Design and Implementation of Portable AUV Control System Based on I.MX6Q

目前便携式AUV控制器大多以X86架构处理器为核心,体积大、集成度低、功耗高。依据AUV控制系统需求,设计了以ARM Cortex-A9系列I.MX6Q CPU为核心,集成电源、GPIO、串口扩展、网卡扩展、AD采集、CAN接口多个模块的电路为硬件平台,嵌入式Linux操作系统为软件运行环境的便携式AUV控制器。在硬件上对控制器进行了定制化设计,在软件上对各模块进行了Linux设备驱动设计与移植。经测试结果表明,该控制器有效地解决了AUV电子舱占用体积大,集成度低,功耗高的问题,而且性能可靠,为便携式AUV实现产品化打下了良好的基础。Today，the controller of most portable AUV is designed based on X86 architecture processor. It has a large volume，low integration，high power consumption. Based on the requirements of AUV control system，the controller of the portable AUV was designed which chooses I.MX6Q CPU of ARM Cortex-A9 series as the hardware core, chooses circuit which integrates power supply，GPIO，serial port expansion，net extension，AD sampling，and CAN interface modules into an organic whole as the hardware platform and chooses the embedded Linux operation system as software running environment. The controller is designed customized on the hardware and the Linux device driver of each module is designed or transplanted on the software. By the test results show that this controller can not only solve the problem of AUV electronic cabin occupies large volume，low level of integration，and high power consumption effectively，but also the modules has reliable performance. It makes a good foundation for portable AUV to realize the productization

Design and Implementation of Portable AUV Control System Based on I.MX6Q

目前便携式AUV控制器大多以X86架构处理器为核心,体积大、集成度低、功耗高。依据AUV控制系统需求,设计了以ARM Cortex-A9系列I.MX6Q CPU为核心,集成电源、GPIO、串口扩展、网卡扩展、AD采集、CAN接口多个模块的电路为硬件平台,嵌入式Linux操作系统为软件运行环境的便携式AUV控制器。在硬件上对控制器进行了定制化设计,在软件上对各模块进行了Linux设备驱动设计与移植。经测试结果表明,该控制器有效地解决了AUV电子舱占用体积大,集成度低,功耗高的问题,而且性能可靠,为便携式AUV实现产品化打下了良好的基础。Today，the controller of most portable AUV is designed based on X86 architecture processor. It has a large volume，low integration，high power consumption. Based on the requirements of AUV control system，the controller of the portable AUV was designed which chooses I.MX6Q CPU of ARM Cortex-A9 series as the hardware core, chooses circuit which integrates power supply，GPIO，serial port expansion，net extension，AD sampling，and CAN interface modules into an organic whole as the hardware platform and chooses the embedded Linux operation system as software running environment. The controller is designed customized on the hardware and the Linux device driver of each module is designed or transplanted on the software. By the test results show that this controller can not only solve the problem of AUV electronic cabin occupies large volume，low level of integration，and high power consumption effectively，but also the modules has reliable performance. It makes a good foundation for portable AUV to realize the productization

A (t,n) Threshold Group Signature Scheme Based on MSP Secret Sharing

门限群签名是群签名中重要的一类,它是秘钥共享与群签名的有机结合.本文通过文献[5]中的MSP方案(Monotone Span Program),提出了一种新的门限群签名方案.在本签名方案建立后.只有达到门限的群成员的联合才能生成一个有效的群签名.并且可以方便的加入或删除成员.一旦发生争议.只有群管理员才能确定签名人的身份.该方案能够抵抗合谋攻击:即群中任意一组成员合谋都无法恢复群秘钥k.本方案的安全性基于Gap Diffie-Hellman群上的计算Diffie-Hellman问题难解上.因此在计算上是安全的.In this paper,a new(t,n)threshold group signature scheme is proposed based on Montone Span Programs.When the scheme is built,a set of members whose number is over the threshold can make a valid group signature.When the dispute occupys,only the authority can determine who is the real signer.The scheme can withstand conspiracy attacks.The security of tiffs scheme is based on the harness of the computational Diffie-Hellman(CDH)problems.Therefore,the schemes is secure for calculation.国家自然科学基金(10371032

A(t,n) threshold group signature scheme based on Mignotte's sequence

电子学报中曾提出了一个在不改变其他有效群成员的签名密钥的情况下,可安全快速地加入或删除群成员的群签名方案。但此方案没有涉及到实际运用中需要设置门限的情况,现对原方案做了改进和推广,保留了原方案中可安全快速地加入或删除群成员的优点,推广到了每次参与签名人数变动较大,并需要设置门限的情况,利用中国剩余定理提出了一个新的基于Mignotte’s门限秘密共享方案的(t,n)门限群签名方案。A group signature scheme that can enlist in and delete a group member safely and quickly without changing the secret keys of other available group members has been proposed in Electronic Journal.The scheme did not deal with the situation of setting threshold.This paper presents a new threshold group signature scheme by extending the Chen Ze-wen's construction.The scheme based on Mignotte's sequence makes use of the Chinese remainder theorem

Application of Evolutionary Programming and Fuzzy Algorithm in PID Control

针对非线性控制系统,利用进化规划模糊算法,对PID控制器规则基的参数进行离线优化,优化后的模糊控制规则可对系统实现实时控制。该控制算法无需任何先验知识和量化因子,具有很强的数据挖掘能力,且模糊规则基的寻优速度较快。通过对非线性系统进行仿真,验证了该算法的有效性,与传统固定参数PID控制方法及遗传算法整定参数PID控制方法相比,明显地提高了系统的稳定性和动态性能。An evolutionary programming and fuzzy algorithm is proposed for nonlinear complicated systems.Evolutionary programming is used in offline training to optimize controller's rule base.Then the optimized base is implemented in online control.The novel method doesn't need any numerical factor and prior experience while possessing strong data-mining ability and rapid optimized speed of fuzzy rule base.Finally,compared with the traditional PID control algorithm and the PID controller with the genetic algorithm based parameter adjustment the simulation result shows that the proposed method has made a great step in the stability and dynamic performance of the given system.厦门大学985二期信息创新平台资助项

骆驼刺幼苗氮素特征对不同灌溉量的响应

氮素在植物所有必需营养元素中是限制生长的首要元素。氮素的来源和分配不但影响氮素利用效率,而且与氮素的周转和内循环有密切关系。为了解极端干旱区深根系植物的氮素特征(生物固氮、氮素分配、氮素利用效率),在塔克拉玛干沙漠南缘的策勒绿洲,依托策勒荒漠草地生态系统国家野外科学观测研究站,以骆驼刺幼苗为研究对象,采用15N稳定同位素法和分层分段挖根法,对3种灌溉量(CK、0.1、0.2m3/m2)下骆驼刺幼苗的氮素特征进行了1个生长季内的动态研究。结果表明:⑴灌溉提高生物固氮,但是灌溉量过多抑制生物固氮。在生长季末,3个灌溉量下的生物固氮比例分别为30.0%、42.8%、11.3%;生物固氮质量分别为0.4、0.8、0.2g/株。(2)灌溉使得分配到骆驼刺幼苗茎、叶中的氮素比例、氮素质量增加,根中氮素质量增加,在生长季初,分配到叶的氮素质量最大,分配到根中的氮素质量最小,在生长季末,3种灌溉量下根中氮素比例高达49.2%、44.5%、55.0%;灌溉有利于增加氮素利用效率,但是,灌溉量过多会降低氮素利用效率。在生长季末,3种灌溉量(CK、0.1、0.2m3/m2)下氮素利用效率分别是:77.9、104.3、84.5。(3)试验中,通过比较不同灌溉量对骆驼刺幼苗氮素特征的影响,发现0.1m3/m2灌溉量为较佳灌溉量