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Since the opening-up and the reform, the air transport in China has been greatly developed.

改革开放以来，我国的航空运输事业有了长足的发展。

To minimize this possibility, Air Products has developed a valve that has the seat internal to the tube.

为了使这种可能性最小化，Air Products研制了一种阀座在管道内部的阀门。

In developed countries the widespread use of air-conditioning systems.

在发达国家的空调系统广泛使用。

The company has developed products are intelligent vehicle control system and automatic air-conditioning control system.

公司已经研发的产品是车身控制系统和智能自动空调控制系统。

Real-time and effective automation control system should be developed so that half-track air-cushion vehicle can be adaptable to complex soft terrain, which exerts fully the advantage of driving ability on the soft ground.

为了使半履带式气垫车能更好地适应于复杂的松软地面条件，充分发挥在软地面上行走的优越性，应研制有效的自动控制系统进行实时地控制。

In order to prove the reliability, test studies have been primarily carried out in the indoor soil bin. The data of the vehicle driving state parameters under the same or different terrain are analyzed. The process curves are compared by different control schemes. The theoretical model of the optimum driving state is reliable and fuzzy control scheme is feasible. The disturbances and unknown factors of control system are analyzed. Test results prove that the half-tracked air-cushion vehicle can drive steadily under control of the computer. At the same time the sensors used to measure soil mechanics characteristics on line need to be developed. And it is the important problem to be solved in the future study. The necessary regulation and correction are put up. So the studies in this paper provide some instruction for the further research work.

为了验证本文提出的最佳工作状态及最佳垫压理论，并分析控制系统的可靠性和稳定性，本文在半履带式气垫车的模型车上，在室内土槽中进行了初步的实车性能和理论验证试验，考察了在同种和不同土壤条件下气垫车的行驶状态参数的测量数据，比较了采用不同控制方法下的过程曲线，验证了最佳工作状态的理论模型和模糊控制系统方案的可行性与可靠性，从而保证了采用自整定模糊PID控制器能够使半履带式气垫车在稳定行驶最佳工作状态下；同时通过试验研究，分析了系统中各干扰与未知因素，对控制方案进行了相应的调整和修正，为今后进一步的研究工作提供了一定的指导。

In recent years, the solid traffic net with waterway, roadway and air-line has been developed greatly. Inland when it refers to the connection between waterway and roadway or roadway and roadway, usually it is bridge or tunnel, but most of them are bridges.

近年来，我国由水路、陆路、空运所形成的立体交通网已得到了巨大的发展，其中在内陆涉及到水路和陆路二者相连的便是桥梁或隧道，但以桥梁居多。

The general design, manufacturing and development of hardware and software of control system were conducted in this dissertation. And the whole set of fabricated system including nozzle and three-dimensional worktable is designed and built by us. Consequently, a new generation rapid prototyping system (Air-pressure Jet Solidification system) has been developed.

本文对系统的硬件与软件进行了总体设计、制造与开发，完成了喷头的研制、三维工作台的制作、温度控制系统的研制、控制软件开发，成功开发出适应人工生物活性骨制造的快速成型专用系统——AJS-1。

AJS (Air-pressure Jet Solidification) system is developed using the principles of FDM technology, but compared with traditional FDM machine there are some differences. So hardware structure, software module and control system need re-designing and optimizing.

气压式熔融沉积系统是在FDM技术原理的基础上开发出来的，但与传统的FDM快速成型机也有一定的区别，因此在硬件结构、软件模块、控制系统上需要重新设计和优化。

In the case of sporting dogs–Airedale and Standard Poodle judges–another requirement should be that the field judges hunt with their dogs as retriever field trials, in particular, have strayed so far into the "circus dog" realm that they bear no resemblance to what dogs need to do when they are actually hunting, the task for which these breeds were historically developed.

对于运动犬组的犬只来说——万能梗和标准贵宾的审查员——还有另外一项附加要求：田野赛审查员要与参赛犬只进行狩猎的实地试验。在某些特殊情况，犬只表现得与"杂耍狗"无异，人们感觉不出犬只该在进行真正的狩猎时应有的行为，即该犬种被赋予的原始作用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。