容积的

The design mainly works on many factors which effecting the volume efficiency of fracturing pump. These factors are working conditions of the pump,imbibitional valve,expulsive valve,clearance volume,sealing property, condensability of influent, liquid leakage and elastic defletion of pump cylinder. Based on these facors, we should induce the efficiency expression, famulate differential eguation and emulational mathematical model of fracturing pump.

本设计主要针对影响压裂泵容积效率的因素如：泵的工作情况、吸液阀结构参数、余隙容积、密封性能、液体的可压缩性、液体泄漏、泵缸的弹性形变等方面进行分析，在此基础上导出效率的表达式，建立微分方程，并建立压裂泵效率仿真的数学模型。

To accelerate the widespread of Synchronous Chip Seal and improve the operation quality of Synchronous Chipsealer, key techniques which influence the operation quality is studied detailedly, including the control of distributing quality, the dynamics characteristics of hydraulic system and the spray characteristics of asphalt nozzle of Synchronous Chipsealer.1 The factors which influence Synchronous Chip Seal quality are studied. Fiducial probability of simultaneous distribution density is advised to be used in evaluating the distribution bias and standard deviation of asphalt and aggregates simultaneously, which is more advanced than the single index evaluation method used before.2 The volume efficiency formula of asphalt pump is revised after analyzing the data of volume efficiency with mathematical statistics, which is helpful to match the asphalt spray system and control the flow out of asphalt pump accurately. With equation deduction and experiment, dynamic of hydraulic system used in Synchronous Chipsealer is studied, which lay the theory foundation on improving the stability and efficiency from design and controlling.4 Simulation on hydraulic system used in Synchronous Chipsealer is done with AMESim; the results indicate that multi-circle parallel connected hydraulic system with constant pressure power is better than that with load-sensing pressure power at present, because the latter will oscillate when the multi circles work at the same time. This conclusion has been proved during the debug of Synchronous Chipsealer.5 Asphalt nozzle characteristics, such as flat jet shape, flow distribution, are studied with experiment, the results indicate that cross quality of asphalt distributing is not increased linearly follow the increase of fan overlap level, the best point usually exists between two whole overlap level, asphalt distributing quality is better than±4% at the 2.5 overlap level, meets the superior specified in standard; The distribution quality of Synchronous Chipsealer can be increased by spray asphalt of different flow rang with nozzle of different diameter

为了加快同步碎石封层技术的推广，提高同步碎石封层设备的作业质量，本文对同步碎石封层设备作业质量的影响因素与控制方法、液压系统的动力学特性和沥青喷嘴的喷洒特性等关键技术进行了深入细致的研究：1研究了影响同步碎石封层作业质量的因素，提出了采用联合密度分布置信概率对同步碎石封层中沥青洒布量和碎石撒布量的系统偏差和标准差指标进行综合评价的方法，克服了传统评价方法只能对单一指标进行评价的缺陷；2采用数理统计的方法，研究了沥青泵的容积效率特性，修正了沥青泵容积效率公式，为沥青喷洒系统的匹配和沥青泵出口流量的精确控制提供了依据；采用数理方程推导与试验相结合的方法，研究了同步碎石封层设备液压系统的动力学特性，为从设计和控制的角度提高同步碎石封层设备液压系统的稳定性和效率奠定了理论基础；3运用AMESim软件对采用负载敏感控制和恒压控制的两种同步碎石封层设备液压系统进行仿真，结果表明：负载敏感控制的并联液压系统在多回路同时工作时，由于液压泵排量控制参考压力不稳定，容易引发液压系统振荡，恒压控制的并联液压系统是目前技术条件下比较理想的同步碎石封层设备工作装置驱动方案；该结论亦通过同步碎石封层设备装机试验得到了验证。4采用试验的方法对沥青喷嘴的喷洒特性进行了研究，结果表明：沥青洒布的横向精度并不是随着喷洒扇面重叠度的增加线性增加，其最高点通常出现在二个重叠度之间的"半重叠位置"，"2.5重叠"洒布时，沥青的横向洒布精度≤±4%，可以达到国家相关标准中的优级标准；同步碎石封层设备还可以根据不同洒布量情况下的流量需求，采用不同通径的喷嘴进行喷洒，提高沥青洒布精度。

Using AMESim software, the vector control three phase asynchronous motor simulation model was established based on the analysis of the principle of three phase asynchronous motor simulation.

建立变频液压容积调速和节流调速相结合的复合调速系统，通过分析矢量控制三相异步电机的原理，利用AMESim软件建立了矢量控制的三相异步电机的仿真模型，并与液压系统仿真模型相结合，建立了矢量控制变频液压容积节流调速系统的仿真模型。

Rotary piston pump is a new structure of water pumps, running a very reasonable job, using the principle of variable volume compression job, a direct-driven rotary manner, as opposed to centrifugal pumps have a series of outstanding performance advantages, rotary piston pump with the complexity of the structure of the centrifugal pump, as with the shell and the rotor blades of the rotor and casing of the rotary continuous variable volume zone, the formation of continuous expansion and compression, pumping and pumping implementation functions.

旋转活塞水泵是一种新型结构的水泵，工作运行状态十分合理，采用变容积压缩原理工作，直接旋转方式驱动，相对于离心式水泵有一系列突出的性能优势，旋转活塞泵结构的复杂程度与离心泵一样，由外壳和带叶片的转子组成，转子与外壳形成连续的旋转变容积区，形成连续的扩张和压缩，实现抽水和扬水的功能。

With different carrier filling factors, the volume load will have different influence on the system. The research results indicated that in the reactor with 7.5％carrier filling factor, whenthe amount of material supplied is 3.2L/d,the capacity aerogenesis rate will be the maximum1.15L/L·d and the COD removing rate rises by 47.38％.It shows the good anti-impact loadperformance.

不同载体填充率下进行的容积负荷对系统的影响研究结果表明：7.5％载体填充率反应器在进料量为3.2L／d时可获得最大容积产气率1.15L／L·d，并在此负荷下的COD去除率也高达47.38％，表现出了良好的抗冲击负荷的性能。

Results: of 52 cases, a total of 33 intracranial aneurysms were detected by the application of volume viewer, which clearly displayed the body, neck and parent artery of intracranial aneurysms, and showed the aneurysms relation with peripheral vessels and cranioaural In 52cases, 8 can of cerebral vascular malformations showed the form, the size and the hemisphere of cacogenesis cerebral vessels, as well a the amount of feeding artery and draining vein.

结果：52例中，脑动脉瘤33例，16层CT容积成像清晰显示所有动脉瘤的形态、大小、生长方向、瘤颈特征及其与载瘤动脉的关系、瘤体与相邻血管和颅骨的三维结构关系，优于DSA脑血管畸形8例，16层CT容积成像并显示畸形血管团的形态、范围大小以及供血动脉、引流静脉的形态及数量。

With the development of lesion inautonomic nervous system, i.e. the elevation of baroreflex set point, blood pressureincreases to stage 1 hypertension and worsens. Furthermore, the role of the effectors,including PVR, ventricular end-systolic elastance, venous unstressed volumes and heartrate, in the regulation of hypertension was analyzed. The results exhibit that the ANSregulation on hypertension works mainly by the reduction of PVR and the increase ofvenous unstressed volume.

随着自主神经系统损坏程度的不断加重，即工作调定点进一步升高，血压水平上升到了1级高血压并趋于严重；研究了神经调节的各效应器(外周血管阻力、心肌最大弹性度、心率和静脉非压力容积)对高血压的作用，表明神经调节机制对高血压的调节主要是通过降低外周血管阻力和增加静脉非压力容积实现的。

However, the therapeutic efficacy is not ideal yet. There were 5 cases remained at least 3 mm enophthalmos postoperatively. The analysis of the CT data indicated that the insufficient compensation of orbital volume should contribute to the remained enophthalmos. The titanium mesh prebent with the aid of CAD/CAM technique can provide precise orbital reconstruction but can not increase the orbital volume sufficiently because of its limited thickness.

与此相应的是，该技术在术后眼球突度和复视恢复程度上，也较传统方法有所提高，然而，其治疗效果并不十分满意，8例患者中有5例在术后仍有超过3mm的眼球内陷，这一方面是由于该组病例创伤相对较为严重，另一方面，我们通过术后CT分析认为是由于眶容积补偿不足造成的，这是因为钛网的厚度有限，即使达到了精确的眶壁重建，其自身厚度也不足以补偿因脂肪液化、萎缩所造成的眶容积损失。

Centrifugal pump flow rate as a pressure change much, while the volume of pump flow rate as a pressure change was small, and the centrifugal pump shaft power decreases with the head of the law to improve the contrary, the volume of the pump shaft power with the pressure increase and increase.

离心泵流量随压力改变很大，而容积泵流量随压力改变却很小，与离心泵的轴功率随扬程提高而减小的规律相反，容积泵的轴功率随压力的提高而增大。

Chiari malformations are a spectrum of anomalies associated with a reduction of posterior cranial fossa volumes and CSF while conserving overall brain volume. Chiari I malformations refer to a greater than 5 mm herniation of the cerebellar tonsils down through the foramen magnum.

chiari畸形是由于后颅窝容积及脑脊液减小而与正常的脑容积不匹配造成的一系列的异常病变的统称。chiariI型畸形是指小脑扁桃体下疝超过枕骨大孔5mm以上。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。