大型灯泡贯流式泵站振动研究概述     

王新  李同春  塔娜 《中国农村水利水电》2009,(2):83-85

机组和泵房的振动是泵站运行中最为常见的问题,直接影响泵站的安全可靠运行。对大型灯泡贯流式泵站振动研究现状和抗振安全评价计算分析方法作了详细的介绍,对研究机组振动诱发泵房振动的共振校核法、拟静力法、谐响应求解法和瞬态动力时程法等进行了阐述,并对这几种方法进行了分析比较,就其存在的问题作了总结概述。  相似文献   

Übersicht der außeralpinen Waldgesellschaften Süddeutschlands     

J. L. Lutz 《European Journal of Forest Research》1949,68(2):76-114

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III. Buchbesprechungen     

von Pechmann  Huber  H. Waldbauer  J. L. Lutz  Ernst  Speer  E. Weiger 《European Journal of Forest Research》1951,70(12):760-768

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Die Mitzweisung der Magnetnadel     

Prof. Dr. C. W. Lutz 《European Journal of Forest Research》1923,45(6):219-226

Ohne Zusammenfassung  相似文献   

Effect of fertilizers and irrigation on multi-configuration electromagnetic induction measurements     

Manuela S. Kaufmann  Christian von Hebel  Lutz Weihermüller  Michael Baumecker  Thomas Döring  Kathlin Schweitzer  Eleanor Hobley  Sara L. Bauke  Wulf Amelung  Harry Vereecken  Jan van der Kruk 《Soil Use and Management》2020,36(1):104-116

Electromagnetic induction (EMI) data are often used to investigate spatial and temporal patterns of soil texture, soil water content and soil salinity. We hypothesized that the EMI methodology might thus also offer potential to detect agricultural legacy effects originating from fertilizer application and irrigation of different fields. Therefore, we performed EMI measurements on two long-term field experiments (LTFE) at Thyrow near Berlin (Germany) that differed in agricultural management with regard to long-term irrigation in combination with mineral (NPK and lime) and organic amendments (straw and farmyard manure). Two different rigid-boom multi-coil EMI instruments were used to measure simultaneously the apparent electrical conductivity (ECa) over nine different depth ranges to study the entire soil profile from topsoil to deep subsoil. Additionally, soil samples were taken from the different treatments to ground-truth the measurements and disentangle the nutrient application or irrigation effects from natural soil heterogeneity. The soil samples indicated a rather homogenous soil and the correlation between soil parameters or states were not significant. However, the treatments showed significant differences in measured ECa values. In general, ECa values were largest on regularly irrigated as well as on mineral and organic fertilized plots, with regular irrigation exhibiting the largest impact on EMI records even though the last application was months before the EMI measurement. Overall, this study reveals that EMI data can support the classical in situ assessment of agricultural management effects within LTFE, while offering new potentials in detecting and understanding legacy effects of agricultural management on spatial soil properties at farm level.  相似文献   

Clinico-chemical blood parameters in foals in the first two months of life]     

R O Waelchli  H Lutz  M Hermann  E Eggenberger 《Schweizer Archiv für Tierheilkunde》1992,134(10):471-482

Eighteen healthy foals were studied from birth until 2 months of age. Blood samples were obtained at the following times: presuckle, 30 hours, 1, 3, 5, 7 and 9 weeks of age. Changes in serum P, Mg, Ca, Na, K, Cl, iron, AP, ASAT, ALAT, GGT, GLDH, CK, lipase, urea, creatinine, cholesterol, triglyceride, uric acid, protein and fibrinogen and in plasma total solids were examined and the values compared to reference values of adult horses. There were characteristic age related changes in several parameters. Single measurements should be interpreted cautiously to allow for individual variations.  相似文献   

Behavior of Newcastle disease virus in the airborne state. 2. Estimation of aerogenic dissemination     

B Lutz  W Müller  K M Koch  D Strauch 《Zentralblatt für Veterin?rmedizin. Reihe B. Journal of veterinary medicine. Series B》1984,31(5):329-337

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Misuse of thyrostatic drugs in cattle: determination of thyroxine (T4) concentration and thyroid weight and detection of methylthiouracil (MTU)     

I Venzin  J Blum  F Crameri  F Ehrensperger  H Lutz 《Schweizer Archiv für Tierheilkunde》1986,128(9):443-458

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The connections between structure, pharmacokinetics and effects of glucocorticoids     

F Lutz 《Tier?rztliche Praxis》1988,16(4):333-341

Corticosteroids above all have an influence on the metabolism of proteins, lipids and carbohydrates. Inflammatory and immunological reactions are suppressed. The effects are based on the induction of both primary and secondary responses. Examples in catabolic and anabolic reactions are described. The significance of bioavailability is illustrated and hints to discriminate the types of corticosteroids for therapeutic requirement are given.  相似文献   

Pathological findings in lentivirus infected cats     

V Dieth  H Lutz  B Hauser  P Ossent 《Schweizer Archiv für Tierheilkunde》1989,131(1):19-25

This report describes the necropsy findings in 3 cats with a natural T-lymphotropic Lentivirus (FTLV) infection. The changes are compared with the "immunodeficiency syndrome" of humans and monkeys. Furthermore, the pathogenicity of the FTLV and the significance of a dual infection with FTLV and Spumavirus is discussed.  相似文献