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This article detailedly expatiated upon the principles, contents and methods of cropland classification; it analyzed the necessity to combine the work of cropland classification with GIS technology, summarized the attributions of ARC/INFOand some other related softwares; it established the technologic route of cropland classification supported by GIS, by a case study in Liwu Town,Li County Hebei Province, this article expatiated the practicable mechanism of combining the function of ARC/INFO with the work of cropland classification, and put forward some new ideas and approaches of utilizing GIS: this paper put forward the idea of coding the polygons in the basic graphic database such as soil map and land use map according to their attributes, and put forward the detailed coding project; based on the code databases, it expatiated upon the detailed approaches to create single梖actor map and output the final classification map; it put forward the principles and the method of creating classification units in the environment of GIS, that is how to keep the lines of soil polygon, the border of districts and the important objects such as residential areas, banks of rivers and roads ,and how to overlap single梖actor soil map and land use map, and to delete some vector lines of the overlapped map appropriately; it detailed the methods of creating mathematic model of classification coefficients in the environment of computer, and used FOXPRO6.0 programs to realize the automation of calculating coefficients; it represented the method of plotting the final map by overlapping various coverages according to the code tables and lookup tables, the process of outputting the cropland classifying map was finished by program.

本文法对耕地等别划分的原则、内容及方法作了较详细的阐述,介绍了多系数综合修正法的耕地等别计算方法及其具体应用和AHP的确权方法;分析了耕地等别划分工作与地理信息系统技术相结合的必要性,简要介绍了地理信息系统软件ARC/INFO及其他相关软件的功能特点,制定了地理信息系统支持下耕地等别划分的技术路线,通过对河北省蠡县蠡吾镇的实证研究,重点阐述了ARC/INFO及相关数据库软件与耕地等别划分结合的有效机制及GIS应用的一些新思想、新方法:提山了对土壤图和土地利用现状图等基础图形数据库进行特征编码的思想和具体的编码方案,阐述了基于与图形库相链接的特征编码表,单因素图提取、成果图的输出的具体实现方法;提出了GIS环境下耕地单元划分的原则和方法,即在保留土壤因素图斑界线、行政界线和重要地物等的原则下,将土壤单因素图和土地利用现状图进行拓扑叠加,对叠加图中的矢量线进行适当的删除;阐述了在计算机环境下,耕地分等参数计算模型建立的方法,并用FOXPRO6.0语言程序实现了参数计算的自动化;阐述了根据图形库特征编码表和建立绘图符号查找表,按不同图层叠加绘制成果图的方法,该过程用命令程序实现耕地等别图的输出。

By means of silty fine sand layers, the paper researches the grouting systems that consists of cement single liquid grouting material, MC super and thin cement single liquid grouting materials, cement and water glass of liquid grouting materials, MC super and thin cement and water glass of liquid grouting materials, TGRM single liquid grouting material, and HSC single liquid grouting material, respectively. The grouting design, grouting parameter, grouting result check of the karst cave No.2 and two passive countermarch returns to fill the situation are analyzed, which can provide an important reference for future tunnels under similar geological conditions.

针对2溶洞平导高压富水粉细砂层地质特点,研究出了由普通水泥单液浆、超细水泥单液浆、普通水泥-水玻璃双液浆、超细水泥-水玻璃双液浆、TGRM单液浆和HSC单液浆组成的注浆材料配套体系,并对2溶洞平导施工过程中出现的2次较为被动的后退回填局面以及施工中的注浆设计、注浆参数选择和注浆效果检查评定进行了总结分析,以期对类似工程的设计、施工提供借鉴价值。

This paper studies the main geometrical parameter such as angle, height, width, stagger and the upper width in dentation and trapezoid flow path, firstly, uses the single-phase numerical simulation of the computational fluid dynamics technique to analyse the influence of different geometrical parameter on discharge coefficient and flow state exponent of drip emitter. Secondly, uses the two-phases numerical simulation of CFD (1% sand content ) to analyse the influence of the above mentioned geometrical parameter on the contribution regulation of sand and anti-clogging performance. Thirdly, uses the PIV ( particle Tracking Velocimetry ) technique which can see the small-scale flow path to observe and test the trajectories and velocities of solid particles in labyrinth flow path, and analyses the basic factors which can influence the movement characteristic of solid particles and the flow state in flow path.

本文以齿形流道、梯形流道为主要研究对象,以流道转角、流道高,流道宽、偏差量及梯形流道上底宽为主要结构参数,首先应用 CFD 单相流数值模拟技术对不同结构参数灌水器流道水力性能进行模拟,分析了不同结构参数对流态指数和流量系数的影响,其次,应用 CFD 两相流(含沙量为1%)数值模拟技术分析了结构参数对含沙量分布规律和抗堵塞性能的影响,然后,应用 PIV 可视化测试方法测试了固体颗粒在流道内运行轨迹及速度,分析了影响固体颗粒运动特性及流道内流体流态的基本因素,最后,对上述流道结构形式通过模具加工及滴灌带试制,进行了标准化测试( GB/T 17187-1997 农业灌溉设备滴头技术规范和试验方法与 ISO 标准 ISO /TC23 /SC18 /WG5N4短周期堵塞测试程序),测试结果验证了 CFD 模拟结果,并提出了迷宫结构流道灌水器的抗堵塞设计方法。

Five novel torsion-mirror optical actuators including double-beam thickness differential structure with single torsional axis, double flexible folded-beam structure with single torsional axis, double-beam vertical torsion comb structure with single torsion axis, four-beam differential compound-micromirror structure with double torsional axis and the combined structure of the four basis forms above, are brought forward. All of these devices could be fabricated by the same silicon micromachining process we have developed. The deformation compensation design with local enhancement for the thin torsional beam which is the key structure of these devices is also put forward to improve the reliability. The three-dimension solid model and two-dimension reduced order model of the torsion-mirror optical actuator are established and then the numerical simulations for evaluating the device characteristics of the statics, dynamics, electrostatic field, mechanical and electrostatic coupling, fluid and solid coupling are carried out to optimize the structure design. Furthermore, three optical fibre clamping structures which could be integrated monolithicly are designed and analyzed to improve the optical coupling capability. 4. Three flexible process flows combined with bulk silicon micromachining and surface silicon micromachining are brought forward to fabricate these novel single-crystal silicon or polysilicon torsion-mirror optical actuators by using the same lithography masks for both SOI wafer and regular silicon wafer. A series of important process experiments are carried out to optimize the process parameters and the process flows. Some novel and typical process phenomena which occurred during the microfabrication are analyzed and then the corresponding solutions are put forward. 5. A MEMS dynamic testing system which exploit blur image synthetic technique, stroboscopic image matching technique, stroboscopic mirau microscopic interferometry technique and microscopic laser dopper vibrometer technique is set up to measure three-dimension and six-freedom micro motions of any MEMS devices with nanometer resolution.

在对硅微机械扭转镜光致动器的光机电特性系统地理论研究的基础上提出了硅微机械扭转镜光致动器的结构设计准则。3、提出了单轴双梁厚度差分结构、单轴双柔性折叠梁结构、单轴双梁垂直扭转梳齿结构、双轴四梁差动复合微镜结构以及以上四种基本结构组合后的衍生结构等五种工艺加工技术兼容的新型的硅微机械扭转镜光致动器,对器件关键结构薄厚度、高耐疲劳扭转梁进行了局部加强的变形补偿设计,建立了器件的三维实体模型以及两维降阶模型,对提出的新结构硅微机械扭转镜光致动器进行了系统的静力学、动力学、静电场、力电耦合和流体固体耦合的建模仿真与优化设计,同时设计并分析了三种可实现单芯片集成的弹性光纤定位夹紧结构。4、提出了组合体硅微加工技术与表面硅微加工技术、兼容同一套光刻版图、可分别基于SOI 晶片和普通Si 晶片、适应于制造提出的各种新结构单晶硅和多晶硅硅微机械扭转镜光致动器的三套柔性加工工艺流程,开展了一系列重要工艺步骤的单项工艺试验,对工艺流程与工艺参数进行了优化,针对加工过程中出现的具有普遍意义的典型工艺问题进行了讨论和分析,并提出了解决方法。5、创新性地将模糊图像合成技术、频闪图像匹配技术、频闪Mirau 显微干涉技术与显微激光多普勒测振技术有机结合,建立起了一套周期运动测量与瞬态运动测量相结合、单点运动测量与全视场运动测量相结合、满足不同MEMS 器件各种动态测试要求的集成的MEMS 三维六自由度微运动精密测量系统。

The dissertation focuses on performance gradient estimation and SRO algorithm of DES aswell as other related topics,such as modeling of DES and discrete event simulation,performancemeasure Hessian matrix estimation,Stochastic Approximationand so on.General Semi-Markov Processis adapted to describe behaviour of DES and discrete eventsimulation.A general result is obtained and applied to analyze strong consistency of performancegradient Perturbation Analysisestimator.Conditions for effectiveness of InfinitesimalPerturbation Analysisare also discussed.New PA algorithms,such as server PA,PA usingDirac generalized function,job sequence PA etc.,are proposed to deal with discreteparameters.Furthermore,strategies of combining PA algorithms with certain iterative rules areanalyzed widely in order to optimize DES parameters and some SRO algorithms are constructed toslove DES optimization problems.

论文将DES性能分析领域中性能梯度估计和单运行仿真优化作为主要的研究对象,探讨了与性能梯度估计有关的DES和离散事件仿真过程建模、高阶导数估计以及随机逼近等理论和方法;建立了具有一般性的DES和离散事件仿真的广义半Markov过程模型;获得了分析性能梯度估计量强相合性的理论结果和无穷小摄动分析算法应用的条件;提出了诸如服务台数目的摄动分析、奇异摄动分析、串联生产线和加工车间中工件加工序的摄动分析等一系列摄动的思想和算法,对连续参数和离散参数都进行了深入的研究;对摄动分析算法同优化规则结合实现仿真优化的策略也进行了广泛的分析,构造了新型的变界截尾的随机逼近算法,并用于DES的单运行仿真优化研究;最后,给出了DES性能分析方法的实证性研究结果。

By using the theories of conservation of momentum,conservation of energy and hydrokinetics,a mathematical model for describing the relationship among the fluid parameters,the formation parameters and the vibrant operation parameters was established.The analytic solutions of one-dimensional and radial transfusion equation for compressive and single-phase fluid flow through the compressive formation were obtained.The effects of each parameter on the vibrant operation were also gotten.On the basis of the above results,the computation models were established.

应用动量守恒、能量守恒、流体动力学等基本原理,建立了地层参数、流体参数和振动作业参数之间相互耦合的数学模型,求出了单相微可压缩流体在可压缩地层中的平面一维和平面径向渗流方程的解析解,得到了各项参数与振动作业效果之间的关系,为振动采油的数值模拟提供了初始压力分布表达式。

The maximum absorption peak was at long wavelength (>650nm), extinction coefficient achieves 10〓 degree, which was one degree higher than HpD. The study has revealed that CPD photosensitizer appeared blue movement under the relevant body environment. The spectra parameters provided basis for selecting light source of PDT. Measurement system which measured singlet oxygen and its quantum yields within the infare range had been set up and the quantum yields of singlet oxygen for CPD were reported: the quantum yields of singlet oxygen for CPD〓 was the highest (φ=0.83) while he quantum yields of singlet oxygen for CPD〓 was the lowest (φ=0.83). Photobleaching's half life time was studied.

给出了此类光敏剂的光谱指认和光谱参数:其吸收光谱峰值位于长波红光区(>650nm),摩尔消光系数达10〓LmoL〓cm〓量级,比血卟啉衍生物高出一个数量级;研究揭示了此类光敏剂在近似体内环境下光吸收的蓝移现象,为光动力治疗光源的选择提供了依据;建立了在近红外光谱区中测定敏化单态氧的光谱和量子产率测量系统,报导了该类光敏剂敏化单态氧的量子产率,其中CPD〓的单态氧量子产率最高(φ=0.83),CPD〓的单态氧量子产率最低(φ=0.51);测定了二氢卟吩类光敏剂的光漂白半衰期。

The defination of continous parameter set valued ordered supermartingale is given in this paper with a kind of new semi_order in superspace P bfc.

利用有关文献中超空间Pbfc上一种新的半序给出了连续参数集值序上鞅概念,它是连续参数单点值上鞅的集值版本,并利用离散参数集值序上鞅的结果得到了连续参数集值序上鞅的表示定理

Our idea of easy dimensional driving includes mainiy:(1) a driving mechanism of construction constraints and dimensional constraints,(2) automatic graphic recognition of constraints,(3) a bothway cross dimensional linked list for storing dimension sparse matrices and for recalling them,(4) a reasonable method of constraint consistence checking,(5) the linking of movement of 2D views,(6) a method for creating a sequence graphic library.

随着二维与三维设计技术的交叉发展,目前的参数化设计主要有两个分支:①面向纯二维的图形参数化,其特点是二维图形为多拓扑环的复杂图形;②面向三维的基于CSG特征造型的参数化,用于拉伸扫描的单拓扑环的二维图形参数化及空间任意曲面的参数化是其特点。

Then we introduced transition probability kernel for the hidden state process and the confederated process. In the deep research, we found that some similar parameters of state transition probability, observation symbol probability and initial state probability were involved in the transition probability kernel of the confederated process. So we can complete the training of traditional HMM parameters by training the transition probability kernel of the confederated process. To our surprised, we got the consistency of transition probability kernel of the confederated process. Meanwhile, we proved the rationality and reliability of the parameters estimation equations under the classical B-W algorithm.

然后对联合过程的转移概率核展开研究,我们根据过程的取值空间的不同,引入了隐状态空间和联合过程空间上的转移概率核,研究中发现在联合空间上的转移概率核包含了在一般的隐马氏模型的参数估计中的所有类似的三组参数(转移概率,观测概率和初始概率),因此对传统的隐马氏模型的参数训练我们可以通过联合过程的转移概率核的训练来完成,更令我们惊奇的是联合过程的转移概率核还具有一致性;同时对于Baum提出的经典的B-W算法给出的关于模型的参数重估计公式,证明了它的合理性和可靠性,即模型经过重估计后的参数能够满足给定的单观测序列在模型下发生的概率是单调递增的。

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推荐网络例句

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性,但我大喊,并在他们的方向扔石头让他们过的线索,远离我,以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。

Store this product in a sealed, lightproof, dry and cool place.

密封,遮光,置阴凉干燥处。