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The GongBuCi have to describe according to the poem of DuFu behind with the structure and form of Ming Dynasty" grass shed view area" of recovering the reconstruction, re-appearing the pastoral appearance that poet so reside, constructing the thick thick poetry atmosphere;Have to set up in 1999 in flower arrangement park of" DuFu poem calligraphy wood-carved", display more than 100 DuFu's poem calligraphy wood-carved work, choose from the building hides several thousand in the pasts a hand book poem genuine calligraphy, engrave with the wood but, have to appreciate the value rather, its verse, calligraphy, have with the material, craft" four unique" it call;" big the hall" inside that locate the important male in a the third in building in thou in peaceful temple in original treasure , display the up to the present the large colored enamel of the local and biggest area(64 square meter) insets to whet to paint the mural with 12 in the pasts anthologist the person carves, image a development for displaying Du Fu usually with Chinese classic verse history;Building inside of basic display the 《 poem saint a thousand years 》, have the honor of acquiring the fifth" whole country ten big display the exhibition exquisite article" the best creativity prize.
工部祠后有依据杜诗描写和明代格局恢复重建的"茅屋景区",重现了诗人故居的田园风貌,营造出浓厚的诗意氛围;在盆景园内有1999年建成的"杜诗书法木刻廊",陈列着百余件杜诗书法木刻作品,是从馆藏数千件历代名人手书杜诗真迹中挑选出,用楠木镌刻而成,颇具观赏价值,其诗歌、书法、用材、工艺有"四绝"之称;位于原梵安寺古建筑群第三重大雄宝殿的"大雅堂"内,陈列着迄今为止国内最大面积(64平方米)的大型彩釉镶嵌磨漆壁画和12尊历代著名诗人雕塑,形象地展示了杜甫生平和中国古典诗歌的发展史;馆内的基本陈列《诗圣著千秋》,荣获了第五届"全国十大陈列展览精品"最佳创意奖。
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The effect of tribology factors on bearing vibration is studied experimentally. AR model and WPT are used to processing the normal arid abnormal signals. The results are as follows:1. The vibration of ball bearings is caused by the tribology action of contact pairs of ball and ring races and has the essential of tribo-dynamics. Any factors affecting the tribology characteristics of contact pairs will affect vibration and noise of bearings consequently.2. Vibration characteristics of bearing keep almostly unchanged with the increasing of axial load expecting the increasing of nature frequencies. When radial load increasing with axial load unchanged, nature frequencies keep unchanged but some new vibration peaks appears in the spectrum.3. Vibration amplitudes are damped and nature frequency are enhanced with sufficient lubrication. Vibration and noise of bearings increase obviously and roar can happen and the contact surfaces scratch slightly under insufficient and unclean lubrication state. Bearing will be disabled in a few minutes without any lubrication.4. Bearing vibration is unstable under low speed. With the speed increasing, the vibration become stable and natural frequencies increase slightly but the amplitudes increase apparently.5. Bearing vibration can be excited only by some harmonics ofwaviness without lubrication and by all harmonics with lubrication based on the theoretical analysis.6. The nature frequencies of ball bearings decrease with the increasing sizes. When international clearance increasing, nature frequencies decrease in radial and increase in axial and angular and the amplitudes increase in radial and decrease in axial and angular. When the number of balls increasing, nature frequencies increase and amplitudes decrease. When the pitch diameter increasing, axial nature frequency increase and others nearly keep no change. When outer race groove curvature radius increasing, nature frequencies increase in radial and decrease in axial and angular and amplitudes keep no change in radial and increase in axial and angular. When inner race groove curvature radius increasing, nature frequencies decrease and amplitudes increase.7. The distortion in amplitude and frequency components of bearing vibration signals picked up by the present probe measurement method is founded and right conclusions cannot be achieved by the signals. When accelerometer is rigidly screwed with steel stud onto a flat outer surface of a ball bearing, vibration signal can be got without distortion and the reliability of research on bearing vibration is assured.8. AR model is suitable for large samples of bearing vibration signals, square root of length of samples can be used as the upper limitation of order determination and the FPE order selection criterion is effective. Many advantages of AR spectrum are founded over the classical based on FFT.9. Time-Frequency analysis is necessary for abnormal noise of ball bearings. WPT overcomes the principle shortcomings of STFT and proved to be a best tool to process the abnormal signals.
理论分析和试验研究表明: 1球轴承振动是钢球—滚道接触副中的各种摩擦学作用引起的,具有摩擦动力学的本质,任何对接触副的摩擦学特性有影响的因素都将对球轴承的振动和噪声特性产生影响; 2中心轴向载荷作用下,载荷增大使球轴承的固有振动频率升高,载荷越大同样的载荷增幅引起的频率升幅减小,足够大的中心轴向载荷作用下载荷的变化对球轴承振动的频率特性不会产生明显的影响; 3轴向和径向联合载荷作用下,径向载荷不大时球轴承振动的固有频率基本不变,但是可能引起变刚度激励的非线性振动,出现新的频峰,过大的径向载荷将使部分钢球脱离接触,使球轴承的振动和噪声呈现不稳定状态; 4润滑对球轴承的振动和噪声特性有重要的影响,良好的润滑对振动有明显的抑制作用,润滑不充分时,振动和噪声的水平会有明显增高,一定条件下还会激发接触副中的谐振,发出啸声,造成接触表面的伤害,无润滑干接触时,短时的运转就会损伤接触副表面,使振动和噪声迅速增大,并随时可能引发严重的磨损和卡滞失效;接触副润滑良好时,油膜的"刚化效应"使球轴承振动的固有频率有所提高,润滑剂中含有弥散性污浊时,振动的幅度总体升高,但弥散性污浊不会改变球轴承振动的频率特性;浙江大学博士学位论文:球轴承振动的研究 5低速时,球轴承振动的基本特征呈现不稳定状态,随着转速的提高,球轴承振动的频率特性趋于稳定,固有频率频峰升高; 6理论分析表明,干接触时钢球和滚道表面波纹度的某些谐波分量能激励球轴承的振动,振动的幅值与谐波幅值成正比,实际球轴承中钢球的分布不可能完全均匀,波纹度的激励作用会随时发生;润滑接触的分析表明,波纹度的任意谐波分量均能激励球轴承的振动; 7球轴承的几何和结构参数分析表明,球轴承尺寸越大,径向、轴向和角振动的固有频率越低;钢球中心圆直径增大,球轴承的径向和轴向振动的固有频率基本不变,角振动的固有频率有所上升,振动的幅频特性基本不变;径向游隙加大使球轴承的径向振动固有频率降低,轴向和角振动的固有频率有所升高,径向振动幅频特性的幅值升高,而轴向和角向降低;钢球的数量增多使球轴承振动的固有频率上升,幅频特性的幅值下降,径向振动的幅值下降最为明显;外圈沟曲率半径系数增大使球轴承径向振动的固有频率升高,轴向和角振动的固有频率降低,径向幅频特性基本不变,轴向和角向幅频特性幅值升高;内圈沟曲率半径系数增大使径向、轴向和角振动固有频率均下降,振动幅频特性的幅值均有升高; 8试验对比表明,传感器采用探针式安装时,由于探针接触副接触特性的影响,钡(量得到的球轴承振动信号有失真,采用专门设计和制作的试验球轴承,以固定式安装加速度计,首次测量得到了球轴承振动的真实信号,通过对振动信号的分析,验证了球轴承振动的理论模型; 9)基于时间序列分析的AR模型适用于大样本球轴承振动信号的分析,以样本长度的均方根值作定阶上界,FPE做判阶准则,给出的AR谱光滑,频率分辨率高,是球轴承振动分析的简便而可靠的手段; 10以时频域分析的小波包变换分析球轴承异音信号能够比较好地定位和聚焦异音发生的时间,时间间隔,频率范围,同样是球轴承振动分析的可靠的手段,可用作球轴承故障诊断技术。
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Design : we have set up a Fire Fighting Equipment Engineering Design Research Institute , and a Fire Fighting Engineering Technology Re - search Center cooperated with 6 domestic famous universities and science and technology research institutes and experiment base etc Jiangsu Fire Fighting Products and Fireproof Material Professional Committee 15 found in our company We have class A design quali cationfor reghting engineering issued by the State Construction Department and the Ministry of Public Security There are more than 20 senior engineers , 100 engineers and 100 experienced technicians in ourcompany We have a CAD -computer - aided design network system equipped with 160 computers A large space multi-functional relaboratory center , constructed with 40000000yun investment and with total area up to 5000 square meters , has passed the acceptance test and approved by the National Quality Technology Supervisory Bureau It has more than ten kinds of international standards engineering application laboratories , such as , gas systems , water systems , marine systems , foam systems ,redetection systems , large space fire extinguishments , transformer room , tunnel , container etc A remote control and computer inspection system 15 set up in the center We have fire protection design ability for any huge construction projects We have successfUlly finished one item ofstatehigh-tech product industrialization promotion program , three state level TOrch Programs , and six state major new products programs , among which , six kinds of products have gained stafe pafents We also formare research center with six national universities to undertake hightechnical reinvestigation
研发设计:南消股份拥有国家建设部颁发的甲级消防工程设计资质,公司与国内多所著名高校建立了科技战略合作伙伴关系,并建立产学研联盟。公司技术中心是江苏省唯一省级消防工程技术中心,设有气体灭火、水灭火、泡沫灭火、工程设计、火灾报警、工艺研究等数十个专项研究室和中试基地,江苏省消防产品和防火材料专业委员会也设在本公司。公司技术中心拥有200多名经验丰富的科技人员,配备了先进CAD计算机辅助设计网络系统,已经具备承担任何大型和特大型项目的消防工程设计,完成了多项国家高新技术产品产业化推进项目、国家级火炬计划项目和国家重点新产品项目,公司的众多产品拥有自主知识产权的专利。产品制造:南消股份加工设备先进,工艺手段完善,计量设备精确,检测设施齐全。拥有产品数控加工中心、玻璃球洒水喷头装配测试线、数控机床加工生产线、数控管道切割线、油漆喷涂自动线、火灾报警产品装配、调试、检测线,以及各类性能先进的检测线。公司主要产品有:高、中压细水雾自动灭火系统;高低压CO2、IG-541、 HFC-227等各类固定气体自动灭火系统;探火管自动灭火系统;各类无管网自动灭火系统;固定式、移动式泡沫灭火系统;各类自动喷水灭火系统;各类消防水炮;各类船用消防产品;多功能救援快艇;各类火灾报警控制器;各类普通灭火器等300多个品种的系列消防产品,是中国消防行业生产品种最全,制造能力最强的企业。公司在同行业当中率先通过了ISO9001质量体系认证,船用产品形式认证,水系统产品率先通过UL认证、FM认证。
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The secretary of the Province of New Netherland, writing in Dutch, in 1650, for the information of those who wished to take up land there, states more particularly that those in New Netherland, and especially in New England, who have no means to build farmhouses at first according to their wishes, dig a square pit in the ground, cellar fashion, six or seven feet deep, as long and as broad as they think proper, case the earth inside with wood all round the wall, and line the wood with the bark of trees or something else to prevent the caving in of the earth; floor this cellar with plank, and wainscot it overhead for a ceiling, raise a roof of spars clear up, and cover the spars with bark or green sods, so that they can live dry and warm in these houses with their entire families for two, three, and four years, it being understood that partitions are run through those cellars which are adapted to the size of the family.
一六五0年,新尼德兰州州秘书长用荷兰文写过一段话,更加详细地告诉预备往那里移居的人说,在新尼特兰的人,特别在新英格兰的人,起初是无法按他们的愿望建造农舍的,他们在地上挖个方方的地窖似的、六七英尺深的坑,长短随便他们自己,然后在墙壁上装上木板,挡住泥土,用树皮合缝,以免泥土落下来,当然也有用了别种材料的,还用木板铺了地板,做了天花板,架起了一个斜桁的屋顶,铺上树皮或绿草皮,这样他们全家可以很温暖很干燥地在里面住上两年、三年,或者四年,可以想象,这些地窖中,还隔出了一些小房间,这要看家里的人口数目了。
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The secretary of the Province of New Netherland,(22) writing in Dutch, in 1650, for the information of those who wished to take up land there, states more particularly that those in New Netherland, and especially in New England, who have no means to build farmhouses at first according to their wishes, dig a square pit in the ground, cellar fashion, six or seven feet deep, as long and as broad as they think proper, case the earth inside with wood all round the wall, and line the wood with the bark of trees or something else to prevent the caving in of the earth; floor this cellar with plank, and wainscot it overhead for a ceiling, raise a roof of spars clear up, and cover the spars with bark or green sods, so that they can live dry and warm in these houses with their entire families for two, three, and four years, it being understood that partitions are run through those cellars which are adapted to the size of the family.
一六五0年,新尼特兰州州秘书长用荷兰文写过一段话,更加详细地告诉预备往那里移居的人说,在新尼特兰的人,特别在新英格兰的人,起初是无法按他们的愿望建造农舍的,他们在地上挖个方方的地窖似的、六七英尺深的坑,长短随便他们自己,然后在墙壁上装上木板,挡住泥土,用树皮合缝,以免泥土落下来,当然也有用了别种材料的,还用木板铺了地板,做了天花板,架起了一个斜桁的屋顶,铺上树皮或绿草皮,这样他们全家可以很温暖很干燥地在里面住上两年、三年,或者四年,可以想象,这些地窖中,还隔出了一些小房间,这要看家里的人口数目了。
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The paper investigates both block-type pilot linear minimum mean square error algorithm and IEEE802.16 OFDM channel estimation analysis. Simulation results confirm the block-type pilot structure is more suitable for IEEE802.16 system. An optimal pilot setting algorithm, based on space frequency domain, is explored and the pilot chart is presented. The proposed algorithm finds its application in MIMO-OFDM. Simulation results show the algorithm presents a good approximation to the perfect channel state information curve, with about 2dB difference in SNR. The simulation results also demonstrate the algorithm achieves fairly high stability in the environment of fast fading, performance of the proposed algorithm is better that of pilot training channel estimation.3. Taking into account the characteristics of IEEE802.16 OFDM system, OFDM system simulation platform is constructed in Matlab, exploiting simulink as a tool. OFDM modulation and demodulation simulation system are configured on LabVIEW platform. All the system signal processing is simulated, including defining system parameters, designing modulation model, and verifying all the proposed algorithms under different environments, such as white Gaussian noise, multi-path fading, with or without guard interval etc. Bit error performance is evaluated. The research provides valid theoretical basis for practical OFDM system performance evaluation.4. Taking advantage of software radio, the paper designs a hardware platform with both 256-IFFT/FFT and 512-IFFT/FFT OFDM schemes co-existing in one platform. You can predetermine one from the two schemes to carry out almost the same model function with different system performance and parameter setting.5. Referring to IEEE802.16 standard, the paper proposes a design method for generating signals and frames suitable for laboratory investigations implemented in laboratory environment.6. Based on 6701evm digital evaluation card, combined with analogy front-end, the paper designs a DSP software model to deal with baseband signal processing. An overall OFDM scheme, with modulation and demodulation function, is accomplished.
讨论分析了MIMO-OFDM中一种基于空频域的最优导频设置算法,给出了导频图案,通过仿真实验表明,该算法与理想的信道状态信息曲线非常接近,信噪比差距约在2dB左右,并且在快衰落条件下具有较好的稳定性,其性能要优于基于前导训练的信道估计方法。3、根据IEEE802.16OFDM系统特点,论文分别在Matlab中应用Simulink工具构建OFDM系统仿真平台、在LabVIEW平台上实现了OFDM调制解调仿真系统,模拟了整个系统的信号流程,进行了OFDM仿真系统参数的选择和调制模块的仿真设计、论证各算法性能,并根据各种不同的条件:例如高斯噪声、多径衰落、有无保护间隔等,对系统的误码特性进行了评估,为正确评价实际OFDM系统的性能提供了有效的理论依据。4、论文以软件无线电思想作为指导,提出了以256点IFFT/FFT为核心和以512点IFFT/FFT为核心的两种OFDM算法模式并存于同一个硬件平台、且可预选的方案,它们在参数选取和性能指标上有所差异,均实现了相似的模块和功能。5、论文参考IEEE 802.16无线网络标准的参数设置,针对本设计系统的应用环境和系统硬件的性能速率,提出了一种应用于实验室环境的信号结构、帧格式等参数设计。6、论文基于TI公司的6701evm数字评估板卡,结合模拟前端搭建数字中频平台,设计了基带处理的DSP软件模块并进行系统调试,基本实现了一套完整的OFDM调制解调方案。
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Governance and Ruichang County, Fujian Province, Ltd. was founded in 1992 with a registered capital of 3 million yuan in governance and the Commissioner of the county, 101 North Main Street, covers an area of 2,000 square meters, owned plant, 1,000 square meters of office space. 2003 annual output value reached 10 million yuan.
福建省政和县瑞昌工艺品有限公司创建于1992年,注册资金300万元,位于政和县城关北大街101号,占地面积2000平方米,拥有厂房、办公室面积1000平方米。2003年年度产值达到1000万元。
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Yuehai that side of the hotel - Beaconsfield Hospital - for a customs gate - Port Square, in which a total length of pedestrian 338 meters with a total construction area of 14,000 square meters.
即粤海酒店侧-拱北医院-关闸口一段-口岸广场,其中步行街全长338米,总建筑面积1.4万平方米。
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Pemba Island is about 75km long and 20km wide, with an area around 850km square about 380 square miles
奔巴岛大约75公里长,20公里宽,面积大约850平方公里(约380平方英里)。
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The main square of Viccenza and major area for market. Beside the square there's the famous Basilica Palladiana that was designed and constructed by Palladio. This building with boat shaped roof in pale green color is the landmark of Vicenza.
市中心最大的广场,市集的主要地点,有著帕拉底欧设计建造的Basilica Palladiana,这个有著浅绿色船型屋顶的建筑物,是维琴察的地标。
- 推荐网络例句
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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。
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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。
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When I was in school, the rabbi explained everythingin the Bible two different ways.
当我上学的时候,老师解释《圣经》用两种不同的方法。