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The nozzle of the gasifier is simplified. The cold-flow field in the gasifier chamber is studied. The research shows that the chamber has recirculation along the whole length. The particles in the chamber perform a very good flowing characteristics even for the large particles of dp=150μm, and no abrupt change is observed. This is due to the operational pressure is high and the density of the gas is large there. The maximal reflux velocity of both phases, the reflux intensity, the concentrational distribution of particles, and the static pressure loss in the chamber are all related to following factors: the load of gasifier, the concentration of coal-water slurry, the diameter of the coal particle, the distribution ratio of oxygen in the two channels of the nozzle, and the angle of jet in nozzle.

本文对水煤浆气化炉喷嘴进行了简化处理,在此基础上,对气化室内的冷态流动过程进行了研究,发现:整个气化室都处于流动的回流区长度范围以内;水煤浆气化炉中,由于操作压力很高,气相密度很大,所以即使对于dp=150μm的较大煤颗粒,其对流体的跟随特性也很好,没有发生流动特性突跃的现象;两相的最大回流速度、回流强度,颗粒相的浓度分布,以及气化室内的静压力损失等,均与气化炉的负荷、水煤浆浓度、煤粒直径、O2在喷嘴两个流道中的分配比例、以及喷嘴的射流角等参数有关。

At last,the optimized formula composition and technique of preparation were obtained by orthogonal design,and long-circulating praziquantel liposome was prepared.

在建立吡喹酮含量测定方法的基础上,通过葡聚糖凝胶柱色谱法、显微镜法、激光散射法等定性及定量方法考察脂质体的包封率、微粒外观、粒径及其分布等指标。

The results show that: 1 sand-sandrock vadose zone structure ""is the critical factor for drought resistent vegetations because of its abundant moisture contents; 2. the relationship between the drought resistant plants and water table depth is not close.

认识到风积沙覆基岩型包气带结构有利于土壤水富集,是鄂尔多斯盆地北部沙蒿、沙柳等耐旱喜沙植被分布与生长的决定性因素,对维系盆地北部生态系统有重要作用;而地下水位埋深与沙蒿等耐旱植被生长间的关系并不密切。

In order to improve the efficiency, an implementing scheme (according to the distribution of strain energy density) was suggested when to consider the fact that the high gradient usually appears only in a very local region, especially in the case of huge amount of computation. All programming has been finished on the platform of commercial codes Mathmatica and Fortran.4. A number of numerical examples and applications were presented to verify the proposed Bezier-Based Element Method. The engineering cases include: the belt die for diamond synthesize, the main frame of wire-rounded press, the hydraulic cylinder of open die forging press. The numerical results show that the BBEM has some good performances.

通过大量的数值算例来考证所构建的各种类型单元,并应用于人造金刚石年轮模具、钢丝缠绕预应力机架和液压机工作缸等实际问题的结构分析;结果表明:所构建的Bezier耦合单元具有描述较大梯度变化场(如位移场、应力应变场等)的能力,该方法不改变单元的大小和形状,保持单元的自由度数不变,而通过调节中间可动节点的位置改变单元内部的场分布,只需少量单元即可较精确地模拟较大的梯度变化;可为有效求解高梯度问题提供新思路,对实际工程应用具有重要意义。

A number of numerical examples and applications were presented to verify the proposed Bezier-Based Element Method. The engineering cases include: the belt die for diamond synthesize, the main frame of wire-rounded press, the oil cylinder of open die forging press. The numerical results show that the BBEM has some good performances. With few elements, the BBEM can lead to a high accuracy. If using same DOFs, the computing precision of BBEM is remarkable higher than that of the conventional FEM.

通过大量的数值算例来考证所构建的各种类型单元,并应用于人造金刚石年轮模具、钢丝缠绕预应力机架和液压机工作缸等实际问题的结构分析;结果表明:所构建的Bezier耦合单元具有描述较大梯度变化场(如位移场、应力应变场等)的能力,该方法不改变单元的大小和形状,保持单元的自由度数不变,而通过调节中间可动节点的位置改变单元内部的场分布,只需少量单元即可较精确地模拟较大的梯度变化;可为有效求解高梯度问题提供新思路,对实际工程应用具有重要意义。

It is the first time to calculate the near noise field with ray method, and replace the inhomogenous SSP in the vertical direction with constant SSP, while other models usually use Fast Field Program such as SARFRI to calculate the near noise field. This model increases the calculation speed about 100 times without decreasing much precision. It can meet the need of engineering.

首次采用射线模型计算噪声近场的贡献,并进一步用等声速代替有垂直分布的声速剖面,而其他模型通常采用诸如SARFRI等快速场程序计算近场的贡献;本模型的计算时间比其他模型的计算时间缩短了2个数量级,精度并未有明显损失,适合工程需要。

Spraying the world's most advanced equipment used in the United States BINKS, France SMAES, spraying equipment as the main products involved spraying equipment, fluid measurement and transmission equipment, plastic extrusion coating equipment, lubrication equipment, customers located in automobile, shipbuilding, construction, mining and Municipal Services , And other fields, spraying line in the design and spraying equipment sales as one of the company.

采用世界先进的美国BINKS、法国SMAES 、喷涂设备为主要产品,涉及喷涂设备、流体计量及输送设备、挤胶涂布设备、润滑设备等,客户分布于汽车、造船、建筑、矿山及市政等各个领域,从事喷涂线设计及喷涂设备销售为一体的公司。

Glaciers in accordance with its distribution, shape, size divided into continental glaciers and mountain glaciers, mountain glaciers can also be further divided into cirque glaciers, hanging cirques, valley glaciers, piedmont glaciers such as several types.

冰川根据其分布、形态、规模等分为大陆冰川和山岳冰川,山岳冰川又可进一步分为冰斗冰川、悬冰斗、山谷冰川、山麓冰川等几种类型。

Some stimulators, including viruses, tumor cells and hot shock, could promote the expression of NKG2 receptors and their ligands via activating certain transcription factors which are capable of up-regulating NKG2 promoters' activity. Meanwhile, epigenetic mechanisms including DNA methylation and histone posttranslational modifications are also critical to expression of NKG2 receptors and their ligands and may control the clonally distribution of some NK cell receptors.

病毒、肿瘤和热休克等刺激可以通过激活相应的转录调节因子,提高启动子活性而上调NKG2家族受体及其配体的表达,而启动子区DNA的甲基化状态、组蛋白的乙酰化和甲基化等表观遗传调控,在NK细胞受体及其配体的表达方面亦起重要作用,并决定NK细胞受体的克隆性分布。

By conditional heteroscedasticity model and stochastic volatility model, the author analyzes the characteristics of peaked kurtosis and fat tails distributing in the series of the return of stock index, discusses the asymmetry and long-memory effect of the volatility process, and studies the information-driving process of volatility in stock market by using the decomposed trade volume as the agent variable of information.

先后运用条件异方差模型、随机波动模型等捕捉股指收益序列分布的尖峰厚尾特征,进而研究了波动过程的不对称性、长记忆效应等,并以经过分解的交易量作为信息的代理变量,研究股市波动的信息驱动过程。

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