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The first control strategy has the disadvantages such as a large amount of computations, inherent pull-out torque, difficulties in realizing the adaptive control and so forth. For the rotor flux-oriented control, changing of load or the rotor speed will result in increased or decreased torque winding currents, which will change the magnetic field distribution in the air gap. Assumption that magnetic field is approximately equal to that generated by torque windings will affect the levitation performances.

分析表明：气隙磁场定向控制中存在最大转矩限制、非线性机械特性，难以实现自适应控制等问题；对转子磁场定向控制而言，当负载或转速变化时，由于转矩控制绕组转矩电流变化将导致气隙磁场发生改变，如果仍以转子磁场近似替代气隙磁场作为悬浮依据，必然影响到悬浮控制性能。

Lacunar infarction in patients with hypertension is also common cerebrovascular disease, clinical manifestations of light, many people without clinical symptoms, and in nuclear magnetic resonance, CT examination or autopsy, was found when more specific clinical symptoms are: a simple movement obstacles, mild hemiplegia, aphasia or without sensory disturbance; pure sensory disturbance, migraine paresthesia or loss of body; dysphonia - clumsy hand syndrome, manifested as paresis and paralysis of tongue, speaking clearly, swallowing difficulties, fine motor hand and foot less flexible; ataxia and hemiparesis, inability to break limbs and lower limbs than upper limbs, uncoordinated movements, these symptoms often disappear in two weeks.

腔隙性脑梗塞也是高血压患者中常见的脑血管病，临床表现较轻，很多人无临床症状，而在核磁共振，CT检查或尸体解剖时才被发现，较为特殊的临床症状有：单纯运动障碍、轻度偏瘫，不伴失语或感觉障碍；单纯感觉障碍、偏身感觉异常或丧失；发音障碍-手笨拙综合征，表现为轻瘫和舌瘫、说话不清、吞咽困难、手脚精细运动欠灵活；共济失调性轻偏瘫，肢休无力、下肢重于上肢，运动不协调，这些症状常可在2周内消失。

In order to improve telephone answering service quality information, practical solution to the difficulties faced by visitors, so visitors will be able to dial a telephone inquiries to be more effective and accurate information, the Capital Airport will actively promote the trip to promote a joint information system and flight information in a large area changes in the ground service personnel under the coordination of the counter and telephone inquiries to the Information Center directly to answer questions raised by the public.

为了提高接听问讯电话的服务质量，切实解决旅客面临的困难，让旅客拨打一次问讯电话就能得到更加有效和准确的信息，首都机场旅促会积极推进联合问讯制度，并在航班信息大面积变动的情况下协调地面服务人员到问讯柜台及电话问讯中心，直接回答公众的提问。

In 1933 a wet grinding and wet grinding slag slag concrete technology, the 20th century, the 50's this technology in large-scale concrete and precast concrete applications, due to the wet pulp mill tailings storage and transportation difficulties in the shortcomings of the technology has not been widely .

在1933年1湿磨和湿磨渣渣混凝土技术， 20世纪50年代该技术在大型混凝土和预制混凝土的应用，由于湿纸浆厂尾矿储存和运输困难的缺点，该技术还没有被广泛。

Just imagine, the purchase of affordable housing in any case the owner of the project is mainly low and middle income residents, if the policy of the rental way the full realization of the sale block, in accordance with the current market and employment situation, the owners of the event of repayment difficulties it will increase the risks of banks, resulting in instability.

试想，购买负担得起的住房在任何情况下，业主的项目主要是低收入和中等收入的居民，如果政策的租金的方式充分实现销售区块，按照目前的市场和就业形势，业主如果还款困难，将增加银行的风险，造成不稳定。

Due to moment resisting connections are made in both directions in steel frames, so beam-to-column web connections are generally as flange connection. The construction and performance under load of web connections are different from flange connections, and there are more difficulties for theory analysis and design. Studies on mechanism of beam-to-column web connections under cyclical load are not only significant to the theoretical research, but also important in practice.

钢结构框架一般纵横两个方向均为框架，梁柱腹板连接非常普遍，构造和受力性能与翼缘连接不同，而且理论分析和设计更为困难，研究钢框架梁柱腹板连接在循环荷载作用下的受力性能和破坏机理并提出抗震设计对策，具有重要的理论意义和重大的工程应用价值。

Novels of Shanghai School not only represent the quality of modernist avant-guard, but also show that of commercial entertainment. In other words, they are not exactly the same as serious literature nor the same as popular works of art."Shanghai Novels"is a unique existence in the history of Modern Chinese Literature, which causes great difficulties for the scholars to understand and explain its place and significance in the literary history.

海派小说既代表着现代主义的先锋性，又具有一定的消费娱乐性，也就是说，既不能完全等同于高雅文学，也与通俗的文艺形式相异的文学类型，都表明&海派小说&在中国现代文学史上是一个独特的存在，并为研究者把握和解说它在文学史上的意义和地位带来相当的难度和复杂性。

The US's unresolved difficulties in Iraq, and the economic and military burden of its occupation, are a major element in why the US is temporarily seeking less openly conflictual relations with Europe and is hoping for at least a little help from them in exchange.

美国在伊拉克遇到的困难，占领所带来的经济和军事负担，是这次美国寻求表面上的减少冲突的主要原因，是希望欧洲能够相应地给予一定的帮助。

For lack of helium gas resource in China,heliumbearing natural gas has become the only source of producing helium gas in industries so there are obvious difficulties in the abstraction technology without costeffectiveness.

含氦天然气迄今仍是工业化生产氦气的唯一来源。我国氦气资源相当贫乏，含量很低，提取难度大，成本高。

Indicators of autism include oversensitivity or under reactivity to touch, movement, sights, or sounds; physical clumsiness or carelessness; poor body awareness; a tendency to be easily distracted; impulsive physical or verbal behavior; an activity level that is unusually high or low; not unwinding or calming oneself; difficulty learning new movements; difficulty in making transitions from one situation to another; social and/or emotional problems; delays in speech , language or motor skills ; specific learning difficulties/delays in academic achievement.

自闭症指标包括过度反应或触摸、运动、观光、或听；身体迟钝或疏忽；身体意识差；容易分心的倾向；冲动身体或言语行为；一个活动的水平高低，是不寻常；不缓，镇静自己；难新动作的学习；难以进行交接，由另一种情况；社会和/或情绪问题；延误讲话，语言或运动技能；读写困难/延误学术成就。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。