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Test and Evaluation of stiffness of a Pin Turning device for Large Marine Engine Crankshafts

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Journal of Power and Energy Engineering 2013年第7期1卷 14-19页

作者： Y. H. Choi G. B. Ha d. H. Kim H. s. An department of Mechanical Engineering Changwon National University Changwon Korea 2department of Mechanical design Engineering Graduate School of Changwon National University Changwon Korea 3Research Institute HNK Machine Tool Co. Ltd. Haman Korea.

In order to prevent unwanted excited vibrations and to secure better machining precision in large size heavy duty machine tools dynamic stiffness is one of the most desirable and critical properties. In the past decades, many researches on machine tool stiffness test and evaluation methodology have been made. However any methodology for a Pin Turning device (PTd), which is a special kind of turning lathe for machining big size crankshaft pins, is rarely found among them. This study proposes a test and evaluation process of stiffness of a PTd by measuring frequency response function at the tool center point (TCP). For conformance proving for the proposed methodology, stiffness of a PTd obtained by the proposed method with impact hammer test (IHT) has been compared with that determined by FEM.

关键词： Pin Turning device (PTd) Machine Tool stiffness Compliance Response Function Impact Hammer Test

珠江流域20世纪环境变化的叶蜡正构烷烃δ^(13)C沉积记录

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中国科学：地球科学 2016年第2期46卷 184-190页

作者：许慎栋张杰王先绪贾国东中国科学院广州地球化学研究所边缘海地质重点实验室广州510640 中国海洋大学海洋化学理论与工程技术教育部重点实验室青岛266100 同济大学海洋地质国家重点实验室上海200092

分析了珠江口外两个短沉积柱状样的叶蜡正构烷烃单体稳定碳同位素组成(δ^(13)C),讨论了它在揭示年代际尺度上流域环境变化的能力.长链正构烷烃主峰为C_(29)或C_(31),且表现出明显的奇数碳优势,说明这些烷烃主要来自维管束植物的叶蜡.... 详细信息

分析了珠江口外两个短沉积柱状样的叶蜡正构烷烃单体稳定碳同位素组成(δ^(13)C),讨论了它在揭示年代际尺度上流域环境变化的能力.长链正构烷烃主峰为C_(29)或C_(31),且表现出明显的奇数碳优势,说明这些烷烃主要来自维管束植物的叶蜡.所有的沉积样品中,C_(29)和C_(31)正构烷烃的δ^(13)C值在-28.8‰-31.2‰变化,这与珠江流域以C_3植物为主的陆地生态系统相吻合.两个沉积柱的δ^(13)C时间变化序列是相似的.从20世纪初期到70年代末这段时间都呈现出一个持续减小的趋势.但在随后的大约15年时间里,δ^(13)C值趋势反转,开始不断增大.在校正了大气CO_2浓度上升和δ^(13)Catm下降所带来的影响后,δ^(13)C_(29)记录基本上仍保留了上述变化规律,但在80年代δ^(13)C值的上升趋势表现得更加明显.通过与实测资料比较,我们认为,1980年之前δ^(13)C校正值的轻微减小趋势应该和珠江流域降水量的增加有关,之后的δ^(13)C值上升则很可能是受干旱气候条件以及人为森林砍伐的影响.因此,我们的结果表明,埋藏于珠江口外沉积物中的叶蜡正构烷烃可以很好地反映该流域在过去一个世纪里的气候变化和人类活动情况.

关键词：叶蜡正构烷烃单体化合物δ^13C值环境变化珠江口

Anaerobic digestion for waste water poultry manure by UBF reactor

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Journal of Environmental sciences 1997年第2期9卷 24-36页

作者： Ghanem I.I.Ibrahim Gu Guowei Zhu Jinfu Tayel,s.A. Khairy M.F.A. El-shimi,s.A. Agricultural Engineering Research Institute Agricultural Research CenterMinistry Agriculture DukkiGizaEgypt school of Environmental Engineering Tongji UniversityShanghai200092China Agricultural Engineering deptartment Faculty of AgricultureAt Azhar UniversityCairoEgypt soil and Water Research Institute Agricultural Research CentreGizaEgypt

In this experiment the performance of UBF process treatment for wastewater chicken manure was tested under the condition of constant temperature of 35℃ and the volume of UBF is 4 liters. The experiment covered two stages: the first was start up with phase I and phase II, the second was steady state. The following results average of operation period were obtained: (1) during the period of start up phase I operation the biogas production rate 0.39v/(***) at the volumetric COd loading rate of 2.97 kg COd/(m 3.d) with COd removal 76.85% and hydraulic retention time of 10.04 hours and phase II the biogas production rate 3.86 v/(***) at the volume loading rate 11.69 kg COd/(m 3.d) have been achieved with COd removal 82.47% and HRT 16.45 hours. UBF process had resistance to the quantitative shock load. (2) during the steady state operation, the biogas production rate 9.83v/(***) at loading rate of 28.85 kg COd/(m 3.d) and COd removal efficiency 80.03% and hydraulic retention time of 18.73 hours have been achieved for this reactor. The operation of UBF reactor was very stable.

关键词： anaerobic digestion UBF reactor poultry manure chicken manure waste water.

seasonal effect on rooting behaviour of important bamboo species byculm cuttings

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Journal of Forestry Research 2012年第3期23卷 441-445页

作者： Y.A.Gulabrao R Kaushal s.K.Tewari J.M.s.Tomar O.P.Chaturvedi G.B.Pant University of Agriculture&Technology Pantnagar 263145India Central soil and Water Conservation Reserach&Training Institute Dehradun 248195India

We investigated the influence of season on the rooting be- haviour of eight important bamboo species viz., Bambusa balcooa, B. bambos, B. nutans, B. tuMa, B. vulgaris, dendrocalamus giganteus, d. hamiltonii and d. strictus. We collected 2-3 node culm cuttings in three growing seasons viz. spring （March）, summer （June） and rainy （August） from superior candidate plus clumps （CPCs） centralized in the germplasm garden. Cuttings were placed horizontally in sand and were provided with intermittent misting at regular intervals. Bamboo species exhibited differential rhizogenesis behavior in different seasons. The study reveals significant variation in sprouting and rooting behaviour in different bamboo species. B. bambos had maximum rooting （78.89%）, followed by B. vulgaris （74.44%）. In general, the potential of different bamboo species for rooting was found to be in the order： B. bambos 〉 B. vulgaris 〉 B. balcooa 〉 d. hamiltonii 〉 B. tulda 〉 d. strictus 〉 d. giganteus 〉B. nutans. The maximum rooting was recorded in spring （56.67%）, which was closely followed by summer （54.58%）. In winter season, minimum rooting （36.67%） was observed. The interaction effect of species x season was also significant on sprouting and rooting pa- rameters. In B. balcooa, B. nutans, B. vulgaris, d. hamiltonii and d. strictus, cuttings collected in summer season showed maximum sprouting and rooting, whereas, B. bambos, B. tulda and d. giganteus had maximum rooting in spring. The maximum number of roots developed per cutting was observed in B. tulda （43.8） during spring season.

关键词： bamboos culm cutting rooting season sprouting

Outcomes after arthroscopic repair of rotator cuff tears in the setting of mild to moderate glenohumeral osteoarthritis

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World Journal of Orthopedics 2022年第7期13卷 631-643页

作者： Ian s Hong Allison J Rao Tyler L CarlLee Joshua d Meade daniel J Hurwit Gregory scarola david P Trofa shadley C schiffern Nady Hamid Patrick M Connor James E Fleischli Bryan Michael saltzman department of Orthopedic surgery Atrium Health Musculoskeletal InstituteCharlotteNC 28207United States department of sports Medicine Orthocarolina Research InstituteCharlotteNC 28207United States department of Orthopedic surgery Columbia University Irving Medical CenterNew York CityNY 10032United States department of Orthopaedic surgery Carolinas Medical CenterCharlotteNC 28207United States department of Orthopedic surgery OrthoCarolina Sports Medicine CenterCharlotteNC 28207United States

BACKGROUNd Rotator cuff pathology is a very common source of shoulder ***,osteoarthritis of the glenohumeral joint can cause shoulder pain and produce similar *** management can be indicated for both pathologies,however,outcomes data is limited when examining rotator cuff repair(RCR) in the setting of glenohumeral arthritis(GHOA).Thus,this study sought to determine outcomes for patients who undergo RCR in the setting of *** To evaluate if a relationship exists between outcomes of RCR in the setting of *** This was a retrospective analysis of patients who underwent arthroscopic rotator cuff repair with concurrent glenohumeral osteoarthritis between *** were stratified based on rotator cuff tear size and glenohumeral osteoarthritis *** were paired 1:1 with patients without glenohumeral *** included had a minimum two year *** of conversion to total shoulder arthroplasty,complication rates following initial surgery,and patient-reported outcome measures were *** A total of 142 patients were *** number of patients that required total shoulder arthroplasty within two years after index surgery was low.2/71(2.8%) patients with GHOA,and 1/71(1.4%) without *** rotator cuff repair,both groups showed favorable patientreported *** Patients with glenohumeral osteoarthritis who underwent arthroscopic rotator cuff repair showed comparable outcomes to patients without glenohumeral osteoarthritis.

关键词： Rotator cuff repair Rotator cuff tear Glenohumeral osteoarthritis shoulder Arthroscopic Outcomes

seasonal Patterns of Nitrogen and Phosphorus in the Litter and soil surface of Transitional Amazon Cerrado Forest, Brazil

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Journal of Environmental science and Engineering 2011年第1期5卷 5-14页

作者： J. de s. Nogueira L. sanches O.B. Pinto-Junior E.d. de Almeida department of Physics Federal University of Mato Grosso Av. Fernando Correa da Costa 2367 Boa Esperanva Cuiaba MT 78060-900 Brazil department of sanitary and Environmental Engineering Federal University of Mato Grosso Av. Fernando Correa da Costa 2367 Boa Esperanca Cuiaba MT 78060-900 Brazil department of Chemistry Federal Institute of Technological Education of Mato Grosso Rua Professora Zulmira Canavarros 95 Cuiabca MT 78005-200 Brazil

Measurements of litter production, and the surface litter pool were made over a 1 year period in a tropical transitional forest near sinop, Mato Grosso Brazil with the aim of quantifying the seasonal variation of nitrogen and phosphorus in the litter and the annual contribution of nutrients to the soil. Average annual litterfall （＋95% confidence interval （CI）） was 8.20 ***^-1 year^-1 and forest floor litter mass was 58.63 ton＇hal. Nitrogen and phosphorus in the forest floor litter mass was highest during the dry and dry-wet season, being 38% higher than in the wet and wet-dry season. seasonal variation in the litter and concentration of nutrients was explained by seasonal variations in the climate, for example in the precipition and soil humidity. Average annual nitrogen and phosphorus concentrations in the forest floor mass were 17.24 ***^-1 and 16.46 ***^-1, respectively. The more significant forest floor mass fraction for returning soil nutrients was the leaves. The concentration of nutrients was higher in the soil superficial layer （at depths between 0-5 cm） than at depths between 30-70 cm, approximately 83% and 93% for total nitrogen and available phosphorus, respectively.

关键词： Tropical forest litterpool nutrient cycling litterfall

A MOdULATION WAVE APPROACH TO COMMENsURATELY MOdULATEd sTRUCTUREs

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A MODULATION WAVE APPROACH TO COMMENSURATELY MODULATED STRUC...

Root colonization by mycorrhizal INIFAP<sup>MR</sup>in barley seed treated with fungicide

sixteenth Congress of the International Union of Crystallography

作者： R.L.Withers J.G.Thompson s.schmid A.d.Rae Research school of Chemistry Australian National UniversityGPO Box 4Canberra CityACT 0200Australia school of Chemistry University of New South WalesP.O.Box 1KensingtonN.S.W.2033Australia

＜正＞Commensurately or incommensurately modulated structures can always be described in terms of an underlying parent structure（characterized in reciprocal space by a set of sharp Bragg reflections G） plus composit...

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Agricultural sciences 2013年第12期4卷 738-743页

作者： Oscar A. Grageda-Cabrera sarahyt s. González-Figueroa Mónica Guadalupe Lozano-Contreras Arturo díaz-Franco Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias (INIFAP) Campo Experimental Bajío Celaya México Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias (INIFAP) Campo experimental Mocochá Yucatán México Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias (INIFAP) Campo experimental Río Bravo Rio Bravo México

The effect of barley seed treated with chlorothalonil fungicide on mycorrhizal root colonization was evaluated. The treatments were: 1) seed with Mycorrhizal INIFAP?, one, two and three doses, and uninoculated seed;2) seed with and without fungicide. Monthly seed plantings were performed with different storage time, looking forward to assessing the colonization degree of the roots. As revealed by the results, the seed treated with chlorothalonil did not lower the root colonization by Mycorrhizal INIFAP?;the chlorothalonil treatment had a 32.63% average root colonization, whereas without chlorothalonil, it was 36.46%. When the seed was treated with root colonization by Mycorrhizal INIFAP?, this was lower in the treatment with one dose;no significant difference was revealed by the treatments with either double or triple doses.?The colonization percentage was progressively decreased by seed storage. The root colonization by Mycorrhizal INIFAP?, throughout the inoculated seed storage time, remained constant and unchanged for the first six months, but then decreased in 50% within a 10-month period for both treated and not treated fungicide seed.

关键词： Chlorothalonil Hordeum vulgare Rhizophagus intraradices

Matrix Tensor Product Approach to the Equivalence of Multipartite states under Local Unitary Transformations

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Communications in Theoretical Physics 2006年第2期45卷 267-270页

作者： GAO Xiu-Hong s. Alberverio FEI shao-Ming WANG Zhi-Xi department of Mathematics Capital Normal University Beijing 100037 China Institut fur Angewandte Mathematik Universitat Bonn D-53115 Bonn Germany

The equivalence of multipartite quantum mixed states under local unitary transformations is studied. A criterion for the equivalence of non-degenerate mixed multipartite quantum states under local unitary transformati... 详细信息

关键词： local unitary transformation multipartite quantum mixed state tensor decomposable