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Biology technique is based on appearance symptom on sweet potato or Ipomoea Setosa after they are infected to identify virus. But it need long period and is apt to be limited by season. Based on coat protein of virus, serology detects virus during peculiar immunology reaction of antibody and antigen. But it can't detect virus without CP and preparing antibody need more time. The molecular biology method is based on nucleic acid to detect virus. This technique has high sensitivity, strong veracity, wide suitability etc.

生物学方法是依据病毒侵染后在甘薯或指示植物上的外观症状进行识别,但检测速度慢,易受季节限制;血清学技术是利用病毒外壳蛋白的抗原性,据特异性的抗体抗原免疫学反应检测病毒存在,但制备抗血清需时间长,对含量少和无蛋白外壳的病毒无法检测;分子生物学方法是以核酸为基础,通过检测病毒核酸来证实病毒的存在,该技术具有灵敏度高、特异性强、适应范围广等特点。

The author provides a solution based on added-on restraint zone to the problem of TA saturation. The distance protection is another important content. The thesis compares the relays based on operation equation with relays based on distance measuring. And then puts forward some viewpoints in changeable characteristics Mho relay, grounding fault distance relay, delta-Z relay and the power system swing and protection blocking.

距离保护是本项目的另一个重要内容,论文对常用的动作方程式与测距式距离继电器作了分析对比,对可变姆欧特性距离继电器、接地距离继电器、工频变化量距离继电器的性能、距离保护的振荡闭锁问题谈了一些看法,确定了装置距离保护的若干关键因素。

Firstly the theoretical models of reflective optical fiber bundle sensors were put forward for their general applicability, which can provide guidance for the design and implement of such sensors. Based on such theoretical models, an embedded optical fiber bundle sensor is implemented for displacement measurement in fine machining and precision controlling. Secondly the design and implement of an embedded network interface was presented, which can connect the sensors into Fieldbus network, IP network, wireless communication network and so on. Lastly the sensor structural design based on embedded microprocessor and real-time operation system, the software structural design based on multitasking and monocycle were presented, which can increase the real-time and reliability features of signal processing and transmission.

结合精细加工和精密控制中的位移测量,提出了同轴随机型反射式光纤束位移传感器的建模分析理论和设计实现,该传感器模型的建立及应用有效地避免了传统"试制-修正"法的盲目性,为反射式光纤束传感器的设计和制造提供了理论指导,为新型传感器的研究和应用开辟了道路;提出了基于嵌入式系统的网络接口模块的设计和实现,使传感器能够无缝接入现场总线、IP网以及无线通讯网等网络,从而拓展了传感器的应用领域;提出了基于嵌入式微处理器和实时多任务操作系统的传感器结构设计以及基于多任务单循环的软件结构设计,提高了传感信息处理和传输的实时性和可靠性。

In conjunction with MICQ, a nephogram clustering algorithm based on PSO is proposed, of which the coding and fitness function are projected. In addition, nowadays, many researches of nephogram classification usually focus on some single feature, and the classifications are achieved based on these unique features, correspondingly. This strategy would probably ignore the potential which is provided by the combined classification based on multiple features.

结合该参数,本文将一种基于群体智能的随机优化技术:微粒群优化算法,引入到云图的分类领域,从算法编码和目标函数的构造方面进行了设计,提出了一种基于微粒群优化的云图聚类算法,为后一阶段的云图分类打下基础。

Based on analysing the respective characteristics of regular PID controller in trational control theory and fuzzy logical controller in intelligent control theory, the idea and technique of expert system is introduced to develop a novel kind of hybrid intelligent controller. It can coordinate two kinds of control algorithms and tune the control parameters on-line for different working zones of the controlled process.(3) The hybrid knowledge expression model, which combines discrete state space model, fuzzy relational model and rule base model, is proposed based on analysing the characteristics of all kinds of knowledge expression models. The knowledge of the controlled process in different aspects can be expressed resonably by it. Based on the model mentioned above, the related optimization strategy for complex system is developed.

本文的主要贡献体现在:(1)以炼油厂的催化裂化装置和钢铁联合企业的大型焦炉装置两个典型的复杂工业过程为例,分析了工业大系统的许多不易控制的特性,并归纳了其中的几个典型特征;(2)针对经典控制理论中的常规PID调节器和智能控制技术中的模糊逻辑控制器各自的特点,通过引入专家系统的思想和方法,开发了一类混合式专家控制器,它同时具备在线协调两种不同控制规律和自动学习控制规则的能力;(3)通过分析各种知识表达模型的特点,提出了一类包括离散状态空间模型、模糊关系模型和规则基模型在内的混合知识表达模型,它能对过程知识在各个不同侧面给予合理的描述。

First, based on the mathematics model of comprehensive decision at present, the concept of evaluation function is introduced. Based on the thinking stability of decision-maker, the essential meaning of comprehensive decision model is discussed, therefore, and a new improved approach on the comprehensive decision model is put forward. Second, the mathematics model of interval number comprehensive decision is systematically discussed, and the ranking method of interval number based on the decision-maker's attitude is provided. Finally, the concept of valuation order relation is introduced, the valuation order relation of interval number and fuzzy number are systematically discussed in detail, it provides a new method to research the order relations of interval number and fuzzy number, therefore, these achievements can be applied in the intelligent system.

首先,针对常用的综合决策模型,给出了评判函数的概念,讨论了综合决策模型的本质意义,指出决策者的思维应具有稳定性,从而给出了综合决策模型的一种改进方法;第二,在此基础上,给出了区间数的综合决策模型,并详细讨论了基于决策者的决策心态的区间数的排序方法;第三,引入了赋值序关系的概念,详细讨论了区间数和模糊数的赋值序关系,为区间数和模糊数的序关系研究提供了新的思路与方法,这些均有望在智能系统中得到广泛的应用。

Space curve is one of the basic elements in geometric modeling, and its effective representation is the basis of modeling. Parametric representation based on features is a kind of high-level representation including semantic information. In Chapter 4, para- metric representations based on features for free form space curve are investigated, and a parametric model for the loop of plain knitted fabric is established, in which 5 parameters with practical meanings are used to represent the shape of a loop and the relationship between loops. A new shrinkage prediction method for knitted fabric are proposed based on the parametric representation and energy minimizing. Experimental results on some plain knitted fabrics illustrate the feasibility of the proposed method.

空间曲线是造型中最基本的几何元素之一,对其有效的表示是造型的基础,而特征参数化表示是其中一种包含语义信息的高层次表示,本文对空间自由曲线的特征参数化表示进行研究,建立了一种针织物线圈的特征参数化几何模型,采用5个具有实际意义的参数表示织物线圈的几何形状及线圈之间的位置关系,并将该模型与能量极小化的方法相结合,得到了一种能较好地预测针织物缩水率的新模型,对随机选取的一些针织布缩水预测实验表明了算法的可行性。

Some statistical properties of product assembly are obtained on the basis of industrial investigation of assembly procedure and analysis of assembly operations of typical products; concept of fuzzy quotient set is introduced to the study of assembly sequence planning and a theoretical frame and algorithm for assembly sequence planning based on product fuzzy quotient set is presented; theory and method of fuzzy automata and fuzzy decision are used in the investigation of sensor based assembly sequence planning and a theoretical frame and algorithm for assembly sequence planning based on information sensing of assembly process are presented; an assembly model for product is put forward; study of product disassemblability is carried on.

论文通过对产品装配工艺的工厂调研及典型产品的装配作业分析得到了有关产品装配的一些统计特征;将模糊商集合的概念引入装配顺序规划的研究中,提出了基于产品模糊商集合的装配顺序规划的理论框架和算法;将模糊自动机及模糊决策的理论和方法应用到基于感知的装配顺序规划的研究中,提出了基于装配过程信息感知的装配顺序规划的理论框架和算法;提出了一种产品装配模型;进行了产品可拆卸性的研究。

3D control of micropositioning, the environment for human-computer interaction based on the micro stereo image displaying, and microinjection are three focuses of this dissertation.The imaging models of CMO micro stereoscope and G micro stereoscope used in microvision subsystem are deduced. According to the imaging models, 3D visual servoing model based on image for micropositioning is set up. The technology of tracking and matching on the feature of image, which are relevant in visual servoing, is studied. Two arithmetic for avoiding obstacles, rolling/surrounding and curved tracking based on the depth first search, are further discussed.

在此基础上,对三维微定位控制技术、基于显微立体图像显示的人机交互操纵环境和微量注射等三个内容进行了重点研究:为了解决3D微定位问题,推导了显微视觉分系统采用的CMO型和G型体视显微镜光学成像模型,在此基础上建立了基于图像的3D显微视觉伺服定位控制模型,对视觉伺服中涉及的实时跟踪与立体匹配技术进行了研究,并进一步探讨了卷包裹法和曲线跟踪两种避障算法。

Tricholoma may be a paraphyletic genus two. The collections identified as T. caligatum is a mixture. Some parts of them from France are members of T. matsutake, the other parts from North America are closed to T. bakamatsutake and T. fulvocastaneum. Tricholoma robustum and T. focale form a clade which is obviously a sister group of the stirp Subannulate. The stirp Caligata was defined as a group mainly on the basis of the predominant veil. But from the result of molecular systematic analysis, the presence of veil is not a stable character in the matsutake group. Species having symbiosis with conifers and broad leaf tree are all transformed from those whose host specificity is not strict. The phylogenetic tree based on ITS sequences resembled the tree of NJ algorithm based on cladistic coding. In the phylogenetic tree based on morphylogical characters, T. zangii and T. bakamatsutake form a clade, but it is the result of convergent evolution as suggested by molecular analyses. The distribution area of the matsutake group can be divided into six regions: middle and northern Europe region, Mediterranean region, Hengduan Mount.— Southeastern Tibet region, Northeastern China—Japan—Far-east Russia region, the Atlantic—North America region and the Rocky Mountain region. The abundance center of the matsutake group are Hengduan Mount.—Southeastern Tibet region and the Rocky Mountain region. Hengduan Mount.

松口蘑群的分子系统学研究得出的结果有:由于粗壮口蘑和羽衣口蘑明显和亚环族(Tricholoma,section subannulate)的种类是来自同一个谱系,和其它松口蘑群的种不具有最近共同祖先,因此松口蘑群是一个多系群;松口蘑群和口蘑属其他种类的亲缘关系比和蜜环菌属更接近;梭柄松苞菇和松口蘑群的差距明显小于油黄口蘑(T.flavovirens)和棕灰口蘑;口蘑属是一个多系群;鉴定为欧洲口蘑的标本明显不是一个单系群,其中一部分是松口蘑,另一部分和黄褐口蘑及傻松口蘑(T.bakamatsutake)比较接近;划分松口蘑群的标准是菌环的存在,但从分子系统学的结果来看,菌环的存在与否并非是一个很稳定的性状;和针叶树专性共生及和阔叶树专性共生均由寄主专化性不强的种类转化而来;在形态学系统发育树上青冈口蘑和傻松口蘑被聚为一个分枝,分子系统学的研究结果表明,这是趋同进化的结果;用支序方法编码作出的NJ树的结果更接近ITS序列的结果。

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推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。