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The macroscopic rheological parameters and microstructure parameters were closely related, it is helpful to explain the essence of multiple rheological properties through the analysis of which the wax evolution process and microstructure of the crude oil which is waxy and high viscosity; the yield time of gelled waxy crude oil monotone increases along with the decreasing of rate of shear (the time of stress effect prolonged), there was power function relationship between them, it can be expressed with ; when adding diesel oil to Sudan crude oil, dilute proportion bigger the eccentricity degree of paraffin particles were bigger too, that was to say the symmetry of wax crystal was better, the wax crystal form fabric more hardly when the intermolecular interaction was smaller; in the light of macroscopica, the fall extent of the abnormity temperature, solidifying point and viscosity could be larger along with the accretion of dilute proportion, as a result, it's rheological properties could be improved.

SD原油析蜡点为94℃,析蜡高峰为50~30℃,异常点为40℃;其蜡晶颗粒细小、对称性差,所以具有较大的比表面能,容易形成联生、联锁结构;损耗角曲线与储能模量曲线或损耗模量曲线的交点所对应的温度与原油凝点或倾点温度非常接近,大约在39℃左右;也就是说,含蜡原油粘弹特性曲线的交点可以表征其流动性;原油宏观流变参数与微观结构参数密切相关,原油析蜡过程及蜡晶微观结构分析有助于诠释易凝高粘原油多重流变特性的本质;胶凝含蜡原油的屈服时间随剪切速率的降低而单调增加,二者显然存在幂函数关系,可用关系式描述;当SD原油加柴油稀释处理时,稀释比越高,蜡晶颗粒的偏心度也越大,亦即蜡晶对称性越好,分子间作用力越小,蜡晶颗粒越不易形成结构,宏观表现为异常点、凝点及表观粘度等流变参数下降的幅度越大,流动性越好。

Summary In this paper, a brief history review of works on the theory of electromagnetic flowmeters is given. A method named'Alternative iteraction method for approaching real boundaries'is presented to solve Laplace's equation with mixed boundary conditions in electromagnetic flowmeters. The orthogonal expansion is used to analyze weight vectors and flow distribition effects on the sensitivity of the flowmeters.

本文在总结和分析了前人在电磁流量计变送器方面的理论研究成果后,首次提出了"交替迭代逼近边界"的方法求解电磁流量计理论研究中遇到的Laplace方程的混合边界条件问题;采用正交函数展开的方法研究权函数以及被测流体速度分布不规则对仪表输出的影响;采用保角变换的方法首次求解出电磁流量计偏心环域上的权函数。

Theoretical analysis and simulation shows that the direction driving motor accelerates first, and then decelerates to compensate for the eccentricity when the satellite is deviated from laser center with a certain distance, and reacquires the tracking satellite. The needed time from reacquisition to tracking is affected by motor acceleration, telescope′s detecting precision, and detector′s response and treatment time, and the effect of detector precision on the reacquisition and re-tracking time is greater, as a result, the detector response and treatment time is decreased to the least.

理论分析与仿真结果表明,当卫星偏离光斑中心一定距离时,指向驱动电机先加速后减速,补偿这个偏心,重新捕获跟踪卫星;重新捕获到跟踪所需时间受电机加速度和望远镜探测精度以及探测器响应处理时间影响,其中探测器精度对重新捕获到跟踪所需时间影响较大,探测器响应处理时间要减小到最小;为了使从捕获到跟踪过程中卫星始终在扫描光斑范围内,经纬仪驱动电机的最小角加速度为25.5°/s2。

The differential equations of the censorial moving and running relative to censorial of the eccentric vibration seed-metering system were set up with the dynamic analysis method.

利用动力学分析法建立了偏心振动式排种系统质心位移和绕质心转动角位移的微分方程。

In the experiments, detection rate and reaction time were measured to evaluate the visual performance of human eyes at three mesopic light levels0.01, 0.1 and 1 cd·m~(-2 with targets of two visual angles (10 and 2°) at two observing eccentricities (0°, 10°). There generated more than 30,000 single measured data and analysis with statistical and computer methods were done.

本论文的实验选用了探测率和反应时间作为评价人眼在中间视觉状态下视觉功能的主要参数,分别在3组典型的中间视觉亮度作为背景亮度0.01,0.1和1 cd·m~(-2和2组不同视场角的目标(10'和2°)以及2组不同的观测偏心度(0°,10°)条件下,先后在中国和德国进行了30,000多个数据采样,并运用计算机技术进行统计分析和研究。

The results indicate the effect of light level, visual angle and eccentricity on detection rate and reaction time at mesopic region; shows series of spectral luminous efficacy drawn out from the experimental results since monochromatic stimulus was used; proves that the results from performance-based method are in essence compatible with those from bright-matching method, since both of them are in accordance

本论文实验和计算结果确定了背景亮度、视场角和偏心度对人眼探测率和反应时间的影响程度;根据视觉功能的基础和实验中选用单色光谱作为视觉目标所得到的数据推导出人眼在中间视觉状态下的系列的光谱光视效率函数;本文研究结果证实了基于视觉功能法和视亮度匹配法所获得的光谱光视效率函数在本质上的一致性,它们都能反映出随着亮度降低而产生的浦尔金耶偏移效应(Purkinje-shift),但本论文所采用的基于视觉功能法还能反映出人眼视觉信息处理中的颜色通道效应。

When an axle journal is at a certain position in a bearing, the pad tilting angle is related to initial eccentricity and clearance ratio, but unrelated to speed, viscosity, etc.

当轴颈在轴承中位置一定时,可倾瓦块摆角只与原始偏心和间隙比有关,与转速、粘度等无关

GB/T2624--936 and production in line with ISO5167 - 1 standard expenditure devices, including pressure Kok access standard orifice, the standard nozzle, the flange pressure from the standard orifice, the trail from pressure from the standard orifice, the length of the nozzle And Venturi tube and cultural Venturi nozzle, double orifice, eccentric orifice, missing a round orifice, cone-shaped entrance orifice, the first-orifice, Pitot Venturi tubes, nozzles, such as the speed of sound. OVAL Co., Ltd.

生产符合GB/T2624--936和ISO5167--1的标准节流装置;包括角接取压标准孔板、标准喷嘴、法兰取压标准孔板、径距取压标准孔板、长径喷嘴以及文丘里管和文丘里喷嘴、双重孔板、偏心孔板、圆缺孔板、锥形入口孔板、端头孔板、皮托文丘里管、音速喷嘴等。

Keywords fuze;ball rotor;primary explosive safety device;safety and arming device;arming delay;mathematical model;dynamics simulation;spin eccentricity;dynamic balanced angle

Article From 南京理工大学;机械电子工程博士论文 2007年度引信;球转子;隔爆装置;保险与解除保险装置;延期解除保险;数学模型;动力学仿真;旋转偏心;动态平衡角

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However, as the name(read-only memory)implies, CD disks cannot be written onorchanged in any way.

然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口,替代木托盘,免薰蒸,符合欧盟、北美各国对出口货物包装材料的法令要求;喷涂钢托盘适用于重载上货架之用,托盘表面根据需要制作成平板状、波纹状及间隔形式,满足不同的使用要求。

A single payment file can be uploaded from an ERP system to effect all pan-China RMB payments and overseas payments in all currencies.

付款指令文件可从您的 ERP 系统上传到我们的电子银行系统来只是国内及对海外各种币种付款。