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This thesis makes harmonics analysis and simulation to the main electric devices of φ 76 Unit in order to seek solution to harmonics pollution of them. Field harmonics data of operating devices is recorded and compared to simulation results. The two are in good agreement. Then, power filter is designed and added to original circuit.

为了针对这些设备进行有目的、有根据的谐波治理方案设计,本论文对现有的Φ76机组的部分主要电气设备进行了谐波分析和仿真,并且用谐波检测仪器进行了设备处于工作状态之下的现场谐波测试,然后把仿真结果与现场谐波检测结果进行了对比,对比证明了仿真的正确性。

The main work and the originality points of this dissertation could be concluded as the following parts:(1) To analyze systematically the mathematical model of LES of air flow in great space, under the case of isothermal and non-isothermal, as well as the combined action of buoyancy and strain. Some basic problems are studied about the LES application into airflow simulation of great space, such as boundary conditions, spatial difference scheme and time advancing scheme, time step etc., which creates the basis for the LES application to indoor airflow simulation.(2) Both the instantaneous and time averaged flow field of great space with multiple jets under isothermal and non-isothermal cases are explored with large eddy simulation method, and also discussed the dynamic characteristics and the law of fluidflow in the great space.(3) Based on the results of LES of the great space and the Fanger thermal comfort indexes, it is brought forward the concept of the series of dynamic thermal comfort evaluating indexes, which could be divided into thermal comfort index with time averaged properties PD, PPD, PMV, thermal comfort index with instantaneous properties IPD, IPPD, IPMV, and time averaged thermal comfort indexes TAPD, TAPPD, TAPMV, and transient situations time averaged thermal comfort indexes TTAPD, TTAPPD, TTAPMV. The differences among them and the calculation methods are discussed, and the four kinds of indexes are calculated with the thermal comfort index PD as an example.(4) Based on the LES results it is discussed the hot air stratification phenomena in air-conditioned buildings in the case with air supply and return registers on the ceiling and the case on the sidewall. The fundamentals of the hot air stratification are studied and the relations of estimating hot air stratification are brought forward.(5) With the advanced apparatus such as hot wire film anemometer IFA300 and laser particle field anemoscope, corresponding model test and site measurements have been done, which are compared with the simulation results and LES is proved a very promising method in air flow simulation indoor.

本文主要工作既创新点体现在以下几个方面:(1)系统分析了等温、非等温和考虑剪切力与浮升力综合作用的高大空间大涡模拟数学模型,并研究了高大空间大涡模拟在室内气流仿真应用中的一些基本问题,如边界条件、空间离散格式和时间推进格式、时间步长选择等问题,为大涡模拟在室内气流计算中的广泛应用打下了基础;(2)首次用大涡模拟方法研究了高雷诺数下高大空间多射流在等温、非等温情况下的瞬时流场和时均流场分布,并探讨了多射流流场的动态特性和流动规律;(3)基于大涡模拟的动态仿真结果和Fanger的热舒适指标,首次系统地提出了动态热舒适评价指标体系的概念:即基于时间平均参数的热舒适指标PD、PPD、PMV;基于瞬时参数的瞬时热指标IPD、IPPD、IPMV;基于时间平均热舒适指标TAPD、TAPPD、TAPMV;以及沿行动迹线的时间平均热舒适指标TTAPD、TTAPPD、TTAPMV,并分析了四类热舒适指标的差异性和计算方法,还以PD值为例对四类指标分别进行了计算;(4)基于数十种工况下空调房间大涡模拟的结果,研究了空调建筑上送上回和侧送侧回两种情况下热分层现象,并探讨了热分层的基本规律,首次提出了避免热分层现象的判断公式;(5)在暖通空调领域,首次使用IFA300热线风速仪、激光粒子速度场仪等先进设备,完成了与大涡模拟相对应的模型试验,并把实测结果与仿真结果进行了对比,说明LES在室内气流仿真方面是一种很有前景的方法。

The main differences in chemical compounds related to the taste and flavorbetween cultured and wild prawns may be summerized as follows: 1 The content of quaternary bases in the extractives of wild prawn is higher than that of cultured prawn; 2 The content of fatty acids, C18:2ω6 is higher in the cultured prawn; 3 Many thiazole compounds were found in the odor concentrate of cultured prawn, azulene was found in the odor compounds of wild prawn; 4 The textrue of cultrued prawn meat is relatively weak.

综上所述,养殖对虾与天然对虾的尝味比较中主要差别是提取物组分的有机碱;对虾肌肉脂质比较结果是养殖对虾肌肉脂质中C18:2ω6含量特别高;对虾挥发性成分结果是养殖对虾中有大量的噻唑化合物,天然对虾存在薁类化合物;两类对虾质地比较的结果是养殖对虾质地不及天然对虾。

Compared for false masculine and false negatire result in urine analyse;and we have analysed factor of affect as crystal and mucilage and druggery. The result of urine analyzer and the result of microscope have adminicled one another and confirmed one another,both they have different factor of affect. We have collated them and combined clinic symptom, educed correct conclusion.

摘要]对尿液分析中所出现的假阳性,假阴性结果进行了分析比较,对影响尿液测定的结晶,黏液丝,药物等理化因素进行分析,对尿分析仪结果,显微镜检结果之间的相互补充,相互印证,又各自有不同的影响因素,对其进行对照分析,再结合临床症状,得出正确结论。

A series of theoretical and experimental studies on the microstrip patch antennas with dielectric superstrates is carried out systematically. Firstly, a comprehensive survey of the microstrip antenna technology and its theories are presented. Then, two analysis techniques, named as the spectral domain Green's function method and the spectral domain integral equation method are developed. The SDGF method is a simplified analysis technique, which takes advantage of the spectral domain immittance approach to find the dyadic Green's function for the stratified media, and obtains the complete closed-form formulas for radiation patterns, directivity, efficiency, gain etc. Some interesting calculated results are presented. The SDIE method is capable of determining resonant frequency, radiation characteristics, input impedance etc, for the covered microstrip patch antennas. Comparing with other full-wave analyses it reduced computation and mathematical labour remarkably. The singularities near the pole location of the surface-wave modes and the difficulty of the integral computation over infinite range of oscillating integrands are dealt with actively and documented well. Results predicted by the SDIE method agree extremely well with our experimental results for resonant frequencies of various superstrates. The superstrate effects on impedance and radiation characteristics also have been investigated experimentally so that the gap due to lack of measured data and computed results for multi-layered superstrate has been filled to some degrees and two useful observations have been achieved for weakening the resonant frequency shift and optimizing the microstrip antenna gain. As a meaningful application, the design and analysis of a 4×4 patch array are introduced.

实用微带天线普遍加介质覆盖层来防护热,物理损伤和环境影响,也可能在飞行或严酷气候条件下自然形成覆盖层本论文对带介质覆盖层的微带贴片天线系统地作了一系列理论和实验研究首先,对微带天线技术和理论作了全面的综述然后,发展了两种分析方法,称为谱域格林函数法和谱域积分方程法SDGF法是一种简化的分析技术,它利用谱域导抗法来求得分层媒质的并矢格林函数,并得出方向图、方向性系数、增益等参数的完整的闭式公式,给出了一些令人感兴趣的计算结果SDIE法能确定介质覆盖微带天线的谐振频率、辐射特性和输入阻抗等与其它全波分析方法相比,它明显减小了计算量和数学工作量已有效地处理了表面波模极点附近的奇异性和对振荡的被积函数的无限区间积分计算的困难对于不同覆盖层情况下的谐振频率,由SDIE法所预示的结果与我们的实验结果吻合得很好对于覆盖层对阻抗和辐射特性的影响也已作了实验研究这在某种程度上填补了缺少实验数据和计算结果之间的间隙,并得出了缓解谐振频率偏移和优化天线增益的两点有用的结论作为有意义的应用,介绍了一个4×4元矩形贴片天线阵的设计和分析。

Beside having solved the involved animals directly through individual identification and paternity,it will be helpful to resolve the case based on the information of the animal hair,plant and microbion in soil which were found in the environment of the suspect. DNA test ; insect ; animal DNA ; plant DNA ; microbion DNA

如根据DNA分析推断年龄段、推断受伤和死亡时间方面有了些值得继续探讨的结果;在对家畜、宠物、野生动物、昆虫等等的个体认定和亲子鉴定上取得了肯定的可应用的结果,有些已经试用于司法鉴定;在植物和微生物的DNA分析上也为将其应用于司法鉴定方面作了有价值的研究

Thirty-one papers did not describe the selection criteria clearly, 18 did not describe whether all the included patients were verified by using a reference standard of diagnosis, 36 did not describe whether the index test results were interpreted without knowledge of the results of the reference standard, 37 did not report the uninterpretable/intermediate test results, and 34 did not report the withdrawals from the study.

多数文献采用回顾性病例对照研究设计,其中31篇未清楚描述研究对象的选择标准,18篇不能确定是否所有研究对象均经金标准核实,36篇不清楚诊断试验结果的解释是否采用盲法,37篇未描述是否有难以解释的结果,34篇未描述是否有退出病例。

Different learning-rule lead to different evolvements from which some significant results are achieved such as the concaving point phenomenon. Due to the individual's quality of self-determination and decision-making, though it is influenced by initial condition, the system's evolvement is ruled by its inner principles, free from the outer power.

由于学习过程的不同导致了演化结果的不同并得到了一些有意义的结果,如:凹口现象,在一些学习规则中,由于个体的自主性决策性和智能性,虽然系统的演化过程受到环境的影响,但结果却并不受给定初始条件的影响,这说明外界条件的影响对演化结果不会产生预期影响。

Methods Twenty-three cases with rapid atrial fibrillation induced by severe aconitine intoxication were randomly divided into two groups, with 12 in treating group treated by ISHL alone and 11 in controlling group treated by conventional therapy, composed of such measures as gastric lavage and administration of emetics and cathartic.T...

对照组 1 1例给予催吐、洗胃、导泻、输液及抗心律失常治疗;治疗组 1 2例不经催吐、洗胃、导泻等排除毒物处理,给予双黄连注射液静滴。观察两组患者症状缓解时间及症状消失时间,并监测心电图恢复正常时间,比较两组结果的差异。结果治疗组患者症状缓解时间、消失时间及心电图恢复正常时间均明显短于对照组(P 。0 1 )。结论双黄连注射液对于乌头碱中毒所致快速性房颤有特别治疗效果

The study results had shown that the GPR and magnetic field of grounding system will produce detrimental effects on the breaker control system. Especially, for those poor insulation control lines, large GPR and longitudinal induction voltage during ground fault may lead to flash-over at control line terminals and thus inducing breaker mis-trip out. For the practical case in this thesis, to do well maintenance and to renew those old breakers and control lines with poor insulation situations are very important strategy for preventing breaker mis-tripping. Other protection measures from GPR and magnetic field induction interferences are important too. This study may provide useful information for planning the protection measures.

本研究结果显示变电所接地系统之GPR及其产生的磁场对断路器控制回路确有不利的影响,尤其当控制系统线路及端子若有绝缘不良,在接地故障发生的GPR及磁场纵向感应电压有可能造成闪络而引发断路器跳脱,对於本研究所探讨的案例而言,经由良好的维护或更新那些绝缘情况不良的老旧断路器及其控制线路,对於本研究所探讨的案例相当重要,而做好GPR及磁场感应干扰的防护措施亦相当重要,本研究分析结果可供规则防护措施之参考。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。