多碎石的

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。

How far can you haul gravel and still make money?

有多远你能捡获的碎石和仍然赚钱？

"Welcome back, Joe," he said in his harsh, gravelly voice.

"向后地欢迎，乔"，他在他的粗糙，多碎石的声音中说。

Very small European freshwater fish common in gravelly streams.

常见于多碎石的溪流中非常小的欧洲淡水鱼。

At present, it always directions the mixture ratio and aggregate grade of cement-fly ash bound macadam mixture according to the experience of lime-fly ash bound macadam or cement bound macadam mixture. It is hard to avoid wasting material and labilization of the construct quality. Thereby it made the applications of cement-fly ash bound macadam mixture base is not extensive in road surface structure of our country.

目前，按照二灰、水泥稳定碎石的经验来指导水泥粉煤灰混合料的配合比及集料级配，难免造成施工过程中的盲目用料或施工质量不稳定，从而使得水泥粉煤灰混合料基层在我国路面结构中应用不多。

Multiple shocks of small inter- electrode gap prevent and prolong the formation of stone street or recrack it in time once it formed which is the key of treating deerhorn- like nephrolith with ESWL.

采用小间隙电极低能量多次碎石，预防和延缓石街形成，并在石街形成后及时疏通，是提高 ESWL治疗边缘性鹿角形结石及部分鹿角形结石成功率的关键。

About 250km (150 miles) to the north, in neighbouring Shanxi province, in Pingdong, a much poorer village, 250 people live along battered dirt roads, and try to grow wheat, corn, soyabeans and winter melon on the dry, rocky mountain land.

远在以北250公里以外的山西省，有一个名叫平东的村庄。250名村民生活较为穷困，他们在碎石路旁边的干燥多石的山地上种植上的的小麦、玉米、黄豆和冬瓜，以此为生。

Methods: 86 patients were given percutaneous nephrolithotomy using third generation swiss lithoclast master.told the patients to lie up after the skill,drink more water.strengthen the management of catheterization tube and kidney and make fistula,did the guidance before patients leaving hospital.

做好充分术前准备，经皮肾镜应用第三代超声／弹道碎石清石系统治疗上尿路结石86例，术后卧床休息，多饮水，加强肾造瘘管、导尿管的护理，做好出院指导。

A series of test are carried out to analyze the characteristics of high temperature rutting, low temperature crack resistance,water stability, fatigue resistance and skid resistance of stone mastic asphalt mixture, stone asphalt concrete and dense graded asphalt concrete. The results show that the pavement performance of SMA is super to the others.

摘 要：通过对沥青玛蹄脂碎石混合料、多碎石沥青混凝土、密级配沥青混凝土进行的一系列路用性能试验研究，包括高温变形特性、水稳性、低温抗裂性、抗疲劳特性以及抗滑特性试验，结果表明沥青玛蹄脂碎石混合料具有优良的路用性能。

More than a hundred years ago the city offered a bounty to ships which would bring to the port rock ballast instead of sand.

而在一百多年前，新奥尔良对那些运送碎石而不是沙土来港口的船只给予奖金。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。