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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。
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Indeed the activity of the Sgarabotto makers was very influential in the violin making school of Parma, Cremona and elsewhere. Much could be said about their combined influence on the cultural heritage within the musical world of string instruments, and of the enormous regard and esteem with which all their students and musicians held the masters. The greatest interest by posterity, of course, centers on their combined oeuvre, on the set of master violins from their hand left for us to play and admire.
事实上, Sgarabotto在Parma制琴学校、Cremona制琴学校以及其他地方都有著深远影响,他们这一组合在很大程度上影响了音乐世界中的弦乐发展,并得到学生和广大音乐家的一致尊敬和好评,对后人留下最大的好处自然是留下了很多经典作品,另外他们的制琴工艺广泛流传影响至今。
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In this paper we combined three chromatographic separation and purification technique such as affinity chromatography, ion exchanger chromatography and hydrophobic interaction chromatography to develope a new technology of stimutaneous extraction of three enzyme from pancreatin. We optimized the technology by studying the methods of purification and assured the technology as: The crude extraction from the dissolution of Pancreatin is directly absorbed on the DEAE gelose fast flow columnEquilibrating buffer is 0.01mol/L NaoAc-HoAc buffer(pH4.5; eluting buffer is 0.2~0.35mol/LNaCl in 0.01mol/LNaoAc-HoAc buffer (pH4.5), and then be eluted by two steps to acquire the peak of kallikrein.The solution which can"t be adsorbed by DEAE gelose fast flow column is adsorbed on affinity chromatographic column Equilibrating buffer is 0.01mol/LTris-HCl buffer(pH7.5, eluting buffer is 0.5mol/LNaCl in 0.01mol/Ltris-HCl buffer(pH7.5)and then be eluted by one step to acquire the peak of trypsin.The solution which can"t be adsorbed by is pretreated with 30%~80%(NH_4)_2SO_4 fractional precipitation, the deposition of the precipitation is dissolved to beabsorbed on phenyl gelose fast flow columnhydrophobic interaction chromatography condition is Equilibrating buffer is lmol/L(NH_4_2SO_4 in 0.01mol/LNaoAc-HoAc buffer(pH4.5), eluting buffer is 0~0.6mol/L(NH_4)_2SO_4 in 0.01mol/LNaoAc-HoAc buffer (pH4.5) and then be eluted by two steps to acquire the peak of chymotrypsin.
本研究考察了各种纯化方法,将离子交换层析、亲和层析和疏水层析三种分离纯化法相结合,建立了激肽释放酶、胰蛋白酶和糜蛋白酶三酶的联产工艺:胰酶用pH4.5醋酸缓冲溶液提取后,粗提液直接上DEAE-琼脂糖快胶柱吸附平衡缓冲液:0.01mol/LNaoAc-HoAc缓冲液(pH4.5,洗脱缓冲液:0.01mol/LNaoAc-HoAc缓冲液(pH4.5)含0.2~0.35mol/LNaCl分两步洗脱,收集激肽释放酶的洗脱峰;DEAE-琼脂糖快胶的未吸附液上亲和层析柱分批吸附平衡缓冲液:0.01mol/LTris-HCl缓冲液(pH7.5,洗脱液:0.5mol/LNaCl溶液,一次洗脱,收集胰蛋白酶洗脱峰;最后,亲和层析未吸附液用30%~80%硫酸铵分级盐析处理,沉淀溶解后用上苯基—琼脂糖快胶吸附平衡缓冲液:0.01mol/LNaAc-HAc缓冲液(pH4.5含1mol/L(NH_4)_2SO_4,洗脱缓冲液:0.01mol/LNaAc-HAc缓冲液(pH4.5)含0~0.6mol/L(NH_4)_2SO_4,分两步洗脱,收集糜蛋白酶的洗脱峰。
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In the homogeneous model, the function of tendons is assumed to be uniform in some approximated way in order to form an equivalent homogeneous material within concrete. The formulation of the homogeneous model is same with that of general FEM for common continuum, let alone the elastic matrix being resultant of that of tendon and concrete. The computation is simple, but the approximate assumption makes this method cannot be generalized, because it only represents the constitution and function of tendons in such a rough way, that the numerical results are inaccurate. In the combined model, the function of tendon is considered by the stiffness matrix with rod element, then add it into the stiffness matrix of concrete by a rational way.
均匀类单元是设想将钢筋均匀弥散于整个单元中,使其成为一种连续均匀材料单元,这种单元的与一般有限元的单元刚度矩阵推导过程一样,只不过其弹性矩阵由混凝土和钢筋两部迭加而成的,此类单元刚阵计算简明而又不会扩大计算规模,但均匀弥散只是为计算简单而作一种假想,不贴近单元构造实际,也不符合实际作用效果。
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He made codes like Justinian, he dictated like Caesar, his conversation was mingled with the lightning-flash of Pascal, with the thunderclap of Tacitus, he made history and he wrote it, his bulletins are Iliads, he combined the cipher of Newton with the metaphor of Mahomet, he left behind him in the East words as great as the pyramids, at Tilsit he taught Emperors majesty, at the Academy of Sciences he replied to Laplace, in the Council of State be held his own against Merlin, he gave a soul to the geometry of the first, and to the chicanery of the last, he was a legist with the attorneys and sidereal with the astronomers; like Cromwell blowing out one of two candles, he went to the Temple to bargain for a curtain tassel; he saw everything; he knew everything; which did not prevent him from laughing good-naturedly beside the cradle of his little child; and all at once, frightened Europe lent an ear, armies put themselves in motion, parks of artillery rumbled, pontoons stretched over the rivers, clouds of cavalry galloped in the storm, cries, trumpets, a trembling of thrones in every direction, the frontiers of kingdoms oscillated on the map, the sound of a superhuman sword was heard, as it was drawn from its sheath; they beheld him, him, rise erect on the horizon with a blazing brand in his hand, and a glow in his eyes, unfolding amid the thunder, his two wings, the grand army and the old guard, and he was the archangel of war!
他象查士丁尼那样制定法典,象恺撒那样独理万机,他的谈吐兼有帕斯加尔的闪电和塔西佗的雷霆,他创造历史,也写历史,他的战报是诗篇,他把牛顿的数字和穆罕默德的妙喻糅合在一起,他在东方留下了象金字塔那样高大的训谕;他在提尔西特把朝仪教给各国帝王,他在科学院里和拉普拉斯争鸣,他在国务会议上和梅尔兰辩论,他经心整饬纪律,悉力排难解纷,他象检察官一样了解法律,象天文学家一样了解天文;象克伦威尔吹灭两支蜡烛中的一支那样,他也到大庙①去为一粒窗帘珠子讨价还价;他见到一切,他知道一切,这并不妨碍他伏在他小儿子的摇篮上笑得象个天真烂漫的人;突然,惊骇中的欧洲屏息细听,大军源源开拔了,炮队纷纷滚动了,长江大河上建起了浮桥,狂风中驰聘着漫山遍野的骑兵,叫喊声,号角声,所有的宝座全震动了,所有的王国的国境线全在地图上摇晃起来了,人们听到一把超人的宝剑的出鞘声,人们看见他屹立在天边,手里烈焰飞腾,眼里光芒四射,霹雳一声,展开了他的两翼,大军和老羽林军,威猛天神也不过如此!
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Because sea letter is in " letter core " the success that goes up with modular group production, foreign capital company undertakes with domestic company the model is combined actively in succession, whole industry whether capture implementation of this good luck to span development, and be not changed to be a main task by the brim.
由于海信在"信芯"和模组生产上的成功,外资企业纷纷主动与国内企业进行模组合作,整个行业能否抓住这个机遇实现跨越发展,而不被边缘化是一个重要课题。
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The results indicated:(1)the combination of the Markov and spatial logistic models can improve the predictability of each model individually. In macroscopic scale, the total land use amount can be predicted via Markov chain; in microscopic scale, the multi-class multinomial logistic model can be used to implement the combined calculations of categorical variable and continuous variable, qualitative variable and quantitative variable to improve the precision of spatial regression. Meanwhile, the transition probability of each land use unit will be confirmed and the prediction of land use spatial distribution will also be completed.(2)the application system developed in accordance with the integrated model can effectively simulate and predict the land use evolution in Shenzhen City, and the prediction precision of verification system will suffice for recent land use monitoring and the making of annual land supply planning.
研究结果:(1)空间Logistic和Markov模型集成可提升单一模型的应用能力,宏观上利用Markov Chain进行土地利用规模总量预测,微观上利用多分类Multinomial Logistic模型解决分类变量与连续变量,定性变量和定量变量的联合解算提高空间回归精度,同时可以确定每一个土地利用单元转移概率,实现土地利用空间分布的预测;(2)基于集成模型开发出的应用系统能够有效仿真和预测深圳市土地利用演化,通过验证系统预测精度能够满足近期土地利用预警和年度土地供应计划编制。
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We shall there endeavour to establish the following propositions:-1. That the most ancient system in which the idea of blood-relationship was embodied, was the system of kinship through females only. 2. That the primitive groups were, or were assumed to be, homogenous. 3. That the system of kinship through females only tended to render the exogamous groups heterogeneous, and thus to supersede the system of capturing wives. 4. That in the advance from savagery the system of kinship through females only was succeeded by a system which acknowledged kinship through males also; and which, in most cases passed into a system which acknowledged kinship through males only. 5. That the system of kinship through males tended to rear up homogeneous groups, and thus to restore the original condition of affairs- wher the exogamous prejudice survived- as regards both the practice of capturing wives and the evolution of the form of capture. 6. That a local tribe, under the combined influence of exogamy and the system of female kinship, might attain a balance of persons of different sexes regarded as being of different descent, and that thus its members might be able to intermarry with the principle of exogamy. 7. That a local tribe, having reached this stage and grown proud through success in war, might decline intermarriage with other local tribes and become a caste.
我们将明确一下命题:1、大部分包括血统联系观念的古代体系是只通过女系计算血族关系的体系。2、原始群是或被假定是纯系的。3、只按女系计算血族关系的系统倾向于实行异类群的外婚制,并因而取代盗妻的体系。4、从只按女系计算血族关系的野蛮系统发展来的高级系统为也承认通过父系计算血族关系的系统所继承。5、通过父系计算血族关系的系统往往跃回均质的群体,并且因此恢复到事情的原始状态——外婚的偏执得以幸存——被认为既是实行盗妻的又是从盗妻发展的。6、一个本地部落在外婚制和女系血族关系的联合影响下,可能达到被认为不同世系的不同性别人们的平衡,而且因此成员可能得以按外婚原则通婚。7、到达这一阶段而且通过胜利的战争获得自豪的本地部落,可能拒绝与本地部落的联姻而变成世袭种姓。
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Results and Conclusions The main factors influencing the treatment effect of PHC in China are the followings:(1) Most patients with PHC of subclinical type failed to be diagnosed and treatment in time.(2) As a wrong idea PHC has been considered an "uncurable disease", so the treatment strategy is nagative.(3) Unsuitable choice of treatment resulted in some PHC unable to be resected.(4) Intraoperative massive bleeding due to unskill-operative techniques, increase the postoperative morbidity and mortality.(5) The manner of treatment is not positive for PHC patients with portal cancer thrombosis, bile duct cancer hteombosis and portal hyperlension.(6) Combined therapy can not be used or unsuitably used.
结果与结论影响我国PHC治疗效果的主要因素有:(1)诊断不及时,致使大多数亚临床期病人未及时确诊,丧失了手术良机;(2)观念陈旧,认为肝癌是&不治之症&,治疗态度消极;(3)治疗方法选择不当,使一些本来可以切除的PHC病人错过了手术时机;(4)手术医生技术不熟练,术中出血多,增加了手术后并发症和死亡率;(5)对PHC合并门静脉癌栓,胆管癌栓,门静脉高压症等合并症缺乏积极治疗态度;(6)不重视或不合理应用综合治疗措施等。
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First, the angular velocity function and maneuver load for certain maneuver flight (including hover, dive-hike and these two combined) are set up. The simulation results of the vibration of double-disk rotor system with cantilever supported on rigid bearings show that rotor would be apparently deformed under maneuver load. Second, the performance of oil force of SFD in maneuver flight is analyzed. The results show that in maneuver flight, the SFD with centering spring will become eccentric and its oil force will be time-related and offset-related. Then, SFDs are introduced into typical Jeffcott rotor system. The whole system will be statically displaced in maneuver flight and the nonsynchronous components of oil force appear in the response of rotor system.
首先,建立了水平盘旋、俯冲拉起及盘旋+俯冲拉起复合机动三种机动飞行条件下的机动角速度函数,并确定了对应机动飞行条件下的机动附加载荷(附加离心力和附加陀螺力矩),分析了带刚支的双盘悬臂转子系统在机动飞行条件下的振动特性,发现发动机转子在机动飞行时会发生明显变形;随后,分析了非定心挤压油膜阻尼器的油膜力特性,机动飞行时,油膜轴颈在机动附加载荷的作用下偏离外环中心,使得带定心弹支的挤压油膜阻尼器也变成了非定心挤压油膜阻尼器,其非定心挤压油膜力是瞬态时变的,并且与SFD油膜轴颈偏移量和进动形态有关;然后,在经典的Jeffcott转子系统中引入带定心弹支的挤压油膜阻尼器,分析了机动飞行时非线性转子系统的振动特性,发现挤压油膜阻尼器油膜力的非协调特性也反映到转子系统的振动响应中;之后,对机动飞行条件下带挤压油膜阻尼器的双盘悬臂转子系统的振动特性进行了分析,并重点分析、总结了俯冲拉起机动飞行时,系统结构参数和工作状态参数(转速比、机动飞行半径、机动角速度等)对该系统振动特性的影响。
- 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。