查询词典 simulate

A new mathematical model is put forward numerically to simulate the wheel ovalization.. In the numerical simulation, the dynamic model of a half railway vehicle coupled with a tangent track is employed. Using the new numerical method investigates vehicle-track coupling system dynamic responses including lateral and vertical displacement of wheelsets and the vehicle, lateral and vertical vibration acceleration of the track at different phase angle of the two side wheels of the same wheelset, which are compared with that of the traditional model. The numerical results show that the discipline and frequency of dynamic responses are accordant, amplitude and phase of lateral dynamic responses are different. It is concluded the traditional track geometric irregularity excitation model does not simulate the effect of periodic wheels ovalization on vehicle-track coupling system dynamic behavior truly, the new model is more accurate and reasonable.

本文研究了车轮二阶周期性非圆化—椭圆化，建立了一个新的模拟车轮椭圆化的数学模型，结合车辆－轨道空间耦合动力学模型，计算了同一轮对左右车轮不同相位和车轮椭圆度下轮对和车体的横、垂向位移，钢轨横、垂向振动加速度，并与传统模型计算结果作了对比，分析表明两种模型的动力响应变化规律和频率一致，但横向动力响应幅值和相位均存在不同程度不可忽略的差异，因此传统的轨道几何不平顺激励模型不能真实模拟车轮的周期性椭圆化对车辆－轨道耦合动态行为的影响，而本文模型更能反映实际椭圆车轮与钢轨接触情形，计算方法准确而合理。

Based on the condition of the local hydrology, according to the true measured data of 9 drills and the historic observed data, using the most popular groundwater simulate software ModFlow to simulate the influence of"Shilihe Reservoir"to the underground water in the area of Yungang Grotto. The responsive relationship between the sluicing of the reserve and the groundwater fluctuation in the area of culture relic protection is forecasted, rational suggestion for the construction of the project is given.

在当地水文地质条件的基础上，根据9个钻孔的现场实测资料和历史观测数据，采用目前最为普及的地下水模拟软件ModFlow模拟&十里河工程&对云冈石窟研究区域地下水位的影响，预测了水库蓄水与文物保护区内地下水水位涨落的响应关系，并提出了排水工程的合理化建议。

Simulation Technology is an important method to understand the world. Only we can ensure the correctness and validity of the simulate system, can the simulate system be vitalizing and the key technology was researched into be practical and feasible.

仿真技术是认识客观世界的一种重要手段，只有保证了仿真系统的正确性和可信度，才能使仿真系统真正具有生命力，使所研究和解决的关键技术具有实用性和可行性。

The entrance section of FuXi Double-arched Tunnel is modeled in the fact of factual shallow buried and unsymmetrical pressure condition. Adopting the three heading construction method to simulate twelve kinds of construction projects, confirm reasonable construction orders and left and right tunnel face interval, systematically analyze and research the changing law of the tunnel deformation and surrounding rock stress in soft and cracked condition of surrounding rock,bring forward pertinent advices against construction disease; Build the deep buried tunnel model in middle section of tunnel , separately adopt the central heading bench cut benching method and the central heading full cross method to simulate ten kinds of construction projects, establish the reasonable construction orders, sidestep length and tunnel face interval, which are due to the deep buried tunnel, systematically analyze and research the change law of the tunnel deformation and surrounding rock stress in the section with good surrounding rock condition, bring forward the reasonable construction projects which can make sure of construction safety and save construction time; Because the central wall is disturbed many times during constructing process, its displacement and stress distribution is very complex.

富溪隧道进口段依照实际的浅埋偏压状况建立模型，采用三导洞法开挖模拟了12种方案，确定了合理的施工顺序和左右主洞掌子面错距，系统地分析研究了软弱破碎围岩浅埋偏压段施工的隧道变形和围岩应力变化规律，提出了防止施工病害的针对性建议；洞身段按深埋隧道建立模型，分别采用中导洞台阶法和中导洞全断面法模拟了10种方案，确立了适合深埋隧道的合理施工顺序、台阶长度和掌子面错距，系统分析研究了围岩较好深埋段施工的隧道变形和围岩应力变化规律，提出了兼顾施工安全和节省工期的合理施工方案；由于受到多次扰动，中隔墙的位移和应力变化规律较为复杂，通过对各种方案的对比分析，得出了中隔墙在施工不同阶段的位移变化规律、应力变化规律和应力分布规律，尤其对于浅埋偏压段隧道施工时中隔墙位移和应力变化规律做了深入研究，提出了合理的施工建议。

According to the diffraction theory used in DVD system, we propose a new theory to analyze the RF signal and tracking error signal of Super-RENS disk. Then we use simulate the tracking error signal under beam aberration. Finally we use FDTD method to simulate the tracking error signal at defocus.

我们亦根据传统光碟片的绕射理论，提出一新的架构用於分析此近场结构，并用此理论进行射频及偏轨信号的模拟；接著探讨在有像差产生的情形下，其对偏轨信号的影响，最后用有限时域差分法验证在失焦下，偏轨信号的变化。

Combining the actual rockburst status after excavation, based on the previous research data in the earlier stage, the character of the tectonic stress in Cangling Tunnel is studied. Finite element method is adopted to simulate the site excavation steps. At the same time, the tectonic stress is changed on the boundary of the model to simulate the actual rockburst areas; and the most proximal area's value is adopted to decide the section tectonic stress. Then, other sections' values are revised.

从苍岭隧道的构造应力场特征入手，结合现场开挖后岩爆实际发生状况，在前期研究资料的基础上，利用有限元计算分析，模拟现场实际施工步骤的同时不断改变模型边界上的构造应力来拟合实际岩爆区，以最接近实际破坏范围的计算结果界定区段构造应力值，据此对隧道各区段的构造应力进行修正。

Using the a hand-hold GPS and wireless transmitting unit to rapidly locate the fire and determine the rate of fire spread, which also offered an indispensable way of verifying the speed of forest fire appealing. Discussing the representation and Computing Method of the simulate calculation error based on the thorough investigation of the sources of simulate calculation error. Pointing out that the speed and directional error are the root of forest fire appealing simulates error. Thus increasing the parameter of error correction is an effect way of reducing systematicsimulationerrors.

4提出了一种利用手持GPS和无线传输设备来快速测定火场位置和林火实际蔓延速度的方法，为林火蔓延模拟速度验证提供了必要的手段；对林火蔓延模拟误差的来源进行了全面分析，探讨了林火蔓延误差的表现形式和计算方法，指出了林火蔓延速度误差和蔓延方向误差是林火蔓延误差产生的根源，提出了通过增加系统误差修正参数来减少系统模拟误差的有效方法。

The results show that the RIEMS can simulate the pattem and seasonal cycle of standard deviation of surface temperature and precipitation. Meanwhile,RIEMS is unable to simulate inter-annual variability of precipitation in April and July, although it does pretty well for January and October precipitation.

结果表明，模式能够较好地模拟出温度和降水的标准差的空间分布和不同区域平均标准差的年变化，同时，对降水的年际变率检验发现，模式能够模拟出一月和十月降水的年际变率，而不能模拟出四月和七月降水的年际变率。

Now, TH-ASSS has realized ASM1 and 1-D SST Model and reserved good interface for other models. This paper focuses on theory and method of model application in practice. It adopt day-period curve to simulate the variation of influent, pollutant distrubution's normal status and average-HRT to simulate the influence of hydraulic delay in practical system.

本研究重点分析模拟系统与实际系统结合的理论和方法问题，采用进水日周期性变化曲线来模拟实际进水的动态变化，结合污染物排放呈正态分布和动态平均HRT方法模拟水力延迟对模拟结果的影响，将呼吸法测量直接用于参数估计和模型校正中，使模拟系统能够很好地符合实际系统。

It also becomes more difficult to model and simulate power grid. Traditional"Quasi-stationary"phase models can't be used for studying electromagnetic transient phenomena; on the other hand, the EMTP models can be used to analyze the electromagnetic transient accurately, but for the limitation of the step size, it can't be used to simulate the large network with a high speed.

这对电力系统的建模和仿真提出了更高的要求，传统的机电暂态模型由于建立在&准稳态&假设基础之上，因此不能用来仿真变化迅速的电磁暂态过程；而电磁暂态模型，虽然能准确反映电磁暂态过程，但由于仿真步长很小，仿真速度受到限制，不适合用来仿真大型电力系统。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。