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SOFTWAre-CONTROLLED SYSTEM OF ULTRA-PreCISION MACHINING AXISYMMETRIC ASPHERIC MIRROR

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Chinese Journal of Mechanical Engineering 2006年第2期19卷 256-259页

作者： GU0 Yinbiao　 WEI Lizhen Department of Mechanical and Electrical Engineering Xiamen UniversityXiamen 361005 China

In order to improve machining accuracy and efficiency, a software-controlled system of ultra-precision machining for axisymmetric aspheric mirror, using techniques of error compensation, remote transmission and modularization, is designed based on industrial PC, Windows 2000 work platform and Visual Basic 6.0. By experiments, this system realizes functions of ultra-precision machining, machining error compensation, remote data transmission and automatic data transformation among first machining, compensation machining and accuracy measurement. The actual application shows that error compensation improves machining accuracy, remote transmission improves machining efficiency while modularization avoids repeated work and improves design efficiency. Therefore, the system has met ultra-precision machining need for aspheric mirror.

关键词： Aspheric surface machining Error compensation remote transmission Visual Basic

Classification of hypersurfaces with two distinct principal curvatures and closed Mbius form in S^(m+1)

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Science China Mathematics 2012年第7期55卷 1463-1478页

作者： LINLiMiao GU0Zhen DepartmentofMathematics EastChinaNormalUniversityShanghai200241China DepartmentofMathematics YunnanNormalUniversityKunming650092China

Let x be an m-dimensional umbilic-free hypersurface in an (m + 1)-dimensional unit sphere Sm+1 (m≥3). In this paper, we classify and explicitly express the hypersurfaces with two distinct principal curvatures and clo... 详细信息

关键词：封闭形式超曲面主曲率分类 SM 单位球面共形平坦 PAL

Role of Baicalein in the regulation of proliferation and apoptosis in human myeloma RPMI8226 cells

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Chinese Medical Journal 2006年第11期119卷 948-952页

作者： LI Qiu-bai Y0U Yong CHEN Zhi-chao Lü Jian SHA0 Jing Z0U Ping Institute of Hematology Union Hospital Tongji Medical CollegeHuazhong University of Science and Technology Wuhan 430022China

Multiple myeloma （MM） is a uniformly fatal disease characterized by a clonal proliferation of neoplastic plasma cells in the bone marrow and is the second most commol hematological malignancy.1 At present, a cure for multiple myeloma has not been achieved with chemotherapeutic regimen, and many patients die of drug-resistant disease. Thus, the development of new effective anticancer agents to treat both early and advanced MM seems to be an attractive perspective.

关键词： Baicalein 12-lipoxygenase proliferation apoptosis

Draft of an Anthropometric reference System for Full-Term Cameroonian Newborns: Prospective Study with Analytical Aim in the Maternity Wards of Douala

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Open Journal of Obstetrics and Gynecology 2024年第3期14卷 435-450页

作者： Henri Essome Charlotte Epossè Ekoube Fulbert Mangala Nkwele Rita Carole Mbono Betoko Irène Cyrielle Edjoa Mboe Michel Roger Ekono Alphonse Ngalame Nyong Robert Tchounzou Ingrid Doriane Ofakem Ilick Hassanatou Iyawa Moustapha Bilkissou Astrid Ndolo Kondo Junie Ngaha Yaneu Marga Vanina Ngono Akam Gervais Mounchikpou Ngouhouo Grâce Tocki Toutou Nelly Noubi Valère Mve Koh Théophile Nana Njamen Training Teaching and Research Unit in Gynecology Obstetrics and Reproduction Faculty of Medicine and Pharmaceutical Sciences University of Douala Douala Cameroon Department of Obstetrics and Gynecology Laquintinie Hospital Douala Cameroon Department of Pediatrics Laquintinie Hospital Douala Cameroon Faculty of Health Sciences of Buea University of Buea Buea Cameroon Pluridisciplinary Department Laquintinie Hospital Douala Cameroon Faculty of Medicine and Biomedical Sciences University of Yaounde 1 Yaounde Cameroon

Introduction: Anthropometry applied to newborns is a reliable indicator of the quality of fetal growth. The latter is influenced by genetic, racial and nutritional factors varying from one population to another, explaining why a standard cannot be applied to all populations. research question: should the Caucasian frame of reference be dogmatically applied in our African context? Multicenter studies are therefore necessary;hence the interest of this work, the main objective of which was to describe the anthropometric profile of full-term newborns in the city of Douala. Methodology: We carried out a cross-sectional study with an analytical aim and prospective data collection in the maternity wards of the Douala General Hospital, Laquintinie Hospital, District hospitals of Deido, Nylon and Bonassama over a period of 4 months (January to April 2020). We were interested in any newborn, born alive, vaginally or by cesarean section, seen in the first 24 hours from a full-term single-fetal pregnancy whose mother had given consent. We excluded newborns whose term was unclear and those with congenital malformations or signs of embryo-foetopathy. Data collection was done using structured and pre-tested survey sheets. The study variables were obstetric and anthropometric. Statistical analyzes were carried out with CS Pro 7.3 and SPSS version 25.0 software. The Student, Chi-square and Fischer tests were used to compare the means of the variables, the percentages with a significance threshold P value results: During the study period, 305 full-term newborns were included, divided into 172 boys and 133 girls. The average anthropometric parameters of the full-term newborn in the city of Douala were: average weight: 3305 grams, average height: 49.8 centimeters, average head circumference: 34.6 centimeters, average upper arm circumference: 11.3 centimeters, circumference average thoracic: 32.8 centimeters. The percentile distribution showed a 10th percentile at 2656 grams and a 90th

关键词： Anthropometry Full-Term Newborn Douala

The Boundary Between Gondwana and Pacifica and the Suturing Ages of Their Allied Terranes in Southwestern China

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Acta Geologica Sinica(English Edition) 1991年第1期65卷 87-95页

作者： Guo Fuxiang Institute of Prediction of Hidden ore Deposits, Guilin College of Metallurgical Geology, Guilin 541004, Guangxi Institute of Prediction of Hidden ore Deposits Guilin College of Metallurgical Geology Guilin 541004 Guangxi

Two terranes formed since the Late Palaeozoic can be distinguished in southwestern China. One is charac-terized by the Permo-Carboniferous ice-rafted marine gravel-bearing clastic formation and the cold-water faunaof the Gondwana facies, including the Gangmar Co, Lhasa, Sa' gya, Tengchong and Baoshan terranes and theother is marked by the Upper Palaeozoic of the Yangtze type with the Cathaysian flora and the Pacific-typefusulinids, comprising the Changning-Menglian, Shuangjiang-Lancang, Qamdo and Bayan Har terranes. TheLongmu Co-Shuanghu-Dengqen-North Lancang River-Kejie-Mengding suture zone between the two groups ofterranes is the boundary between Gondwana and Pacifica in southwestern China. On the grounds of thesedimentary formation and successive southwestward migration of the Asian nonmarine Jurassic-Cretaceousendemic bivalves, the ages of the suture and some terranes to the southwest of the suture zone are *** Baoshan terrane and the Nyainrong-Sog terrane in the Lhasa composite terrane were firstly pieced togeth-er with the Asian continent in the early Early Jurassic. The northern Tibet-western Yunnan microplate, in-cluding the Gangmar Co, Lhasa and Tengchong terranes, collided with the Asian continent at the end of theEarly Cretaceous Neocomian.

关键词： The Boundary Between Gondwana and Pacifica and the Suturing Ages of Their Allied Terranes in Southwestern China

Multi-dimensional Simulation of Phase Change by a 0D-2D Model Coupling via Stefan Condition

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Communications on Applied Mathematics and Computation 2023年第2期5卷 853-884页

作者： Adrien Drouillet Romain Le Tellier Raphaël Loubère Mathieu Peybernes Louis Viot Institut de Mathématiques de Bordeaux Universitéde Bordeaux33405 Talence CedexFrance CEA-DES-IreSNE-DTN CEA Cadarache13108 Saint Paul-lez-DuranceFrance

Considering phase changes associated with a high-temperature molten material cooled down from the outside,this work presents an improvement of the modelling and the numerical simulation of such processes for an application pertaining to the safety of light water nuclear *** a core meltdown accident,the behaviour of the core melt(aka corium)into a steel vessel is of tremendous importance when evaluating the vessel *** correctly the heat fluxes requires the numerical simulation of the interaction between the liquid material and its solid counterpart which forms during the solidification process,but also may melt *** simulate this configuration,encoun-tered in various industrial applications,one considers a bi-phase model constituted by a liquid phase in contact and interaction with its solid *** liquid phase may solidify in presence of low energetic source,while the solid phase may melt due to an intense heat flux from the high-temperature *** the frame of the in-house legacy code,several simplifying assumptions(0D multi-layer discretization,instantaneous heat transfer via a quadratic temperature profile in solids)are made for the modelling of such phase *** the present work,these shortcomings are illustrated and further overcome by solving a 2D heat conduction model in the solid by a mixed Raviart-Thomas finite element method coupled to the liquid phase due to heat and mass exchanges through Stefan *** liquid phase is modeled with a 0D multi-layer *** 0D-liquid and 2D-solid mod-els are coupled by a Stefan like phase change interface *** sanity checks are performed to assess the validity of the approach on 1D and 2D academical configurations for which exact or reference solutions are *** more advanced situations(genu-ine multi-dimensional phase changes and an"industrial-like scenario")are simulated to verify the appropriate behavior of the obtained coupled simulation schem

关键词： Simulation of phase change Fusion Solidification 0D multi-layer model 2D heat conduction model Model coupling

Acute spinal subdural haematoma complicating a posterior spinal instrumented fusion for congenital scoliosis:A case report

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World Journal of Clinical Cases 2023年第20期11卷 4890-4896页

作者： Godefroy Michon du Marais Anne Tabard-Fougère Romain Dayer Division of Paediatric Orthopaedics and Traumatology Unit Geneva University Hospitals and Geneva UniversityGeneva 1205Switzerland Division of Paediatric Orthopaedics Geneva University Hospitals and Geneva UniversityGeneva 1205Switzerland

BACKGROUND Acute spinal subdural haematoma(ASSH)is a rare and potentially devastating condition with a variable *** described subdural haematomas were thought to have occurred spontaneously or be related to major or minor iatrogenic or traumatic injuries caused by surgery,spinal puncture or epidural *** contributing pathologies have been described,such as intradural tumours or spinal arteriovenous *** has also been associated with anticoagulation therapy,haemostatic abnormalities and risk factors such as *** the best of our knowledge,this case study described the first reported occurrence of an ASSH during spinal surgery in a paediatric *** patient was not known to have any coagulopathies,and no obvious vascular lesions were *** surgical procedure did not directly involve the dura mater,and no evident intraoperative dural tears were *** SUMMARY We reported and discussed a case of ASSH complicating a posterior spinal instrumented fusion during surgery for paediatric congenital *** condition has not been previously *** made recommendations for facing such an occurrence,explored its aetiology in the context of malformation and discussed the benefits of neuromonitoring during scoliosis correction and the management *** conducted a PubMed literature review for cases of paediatric ASSH and other closely related *** reviewed recommendations regarding neuromonitoring and treatment management in such *** ASSH is a rare complication of posterior spinal instrumented *** cases are more often associated with anticoagulation therapy or *** is strongly recommended to detect and assess neurological status,thus enabling rapid diagnosis and treatment and facilitating early spinal decompression and a return to a normal neurological status.

关键词： Acute spinal subdural haematoma Congenital malformation Paediatric Posterior spinal instrumented fusion Scoliosis Somatosensory evoked potential Case report

ATP as anindicator of biomass activity in thermophilic upflow anaerobic sludge blanket reactor

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Journal of Environmental Sciences 2000年第3期12卷 380-384页

作者： CHEN Hong (Department of Environmental Science and Engineering ,Zhejiang University ,Hangzhou 31 0 0 2 7,China) 浙江大学浙江杭州 3 1 0 0 2

Thisworkinvestigatedthebiomassactivityinathermophilicupflowanaerobicsludgeblanket (UASB )reactorof wastewatertreatment .SynthetictextilewastewaterwithpH 1 0— 1 1 ,CODlevelof2 0 0 0— 30 0 0mg/Lwastested .Cellularadenosine triphosphate (ATP)involatilesolids (VS ;mgATP/gVS)wasmeasuredandexpressedasspecificATPcontenttocomparethe biomassactivityinupzoneandlowerzoneinUASBreactor .TheresultshowsthatthespecificATPcontentbasedontotalvolatile solids (VS)inlowerzone ( 0 .0 4 6mgATP/gVSaverage)ismuchlowerthanthatinupzone ( 0 .62mgATP/gVSaverage)duetohighcontentofinactivebiomassandhighpHinlowerzone .TheSATPinupzoneincreasesasHRTincreasesandapproachestoa maximumvalueof 0 .85mgATP/gVSatHRTof 7h ,thendecreases .ItshowsmostofthetotalVSinupzonerepresentactive bacterialbiomassatHRTof 7h .Rateofsubtractutiliz*** effectofHRTonSATPinlowerzoneisnotassignificantasonSATPinupzone .ThebuffercapacityofthethermophilicUASB reactorisverygood .ItistheactivityofsludgegranulesinlowerzonethatgivetheUASBreactorsuchagoodbuffercapacitytotheinlethighpH .

关键词： ATP biomassactivity UASBreactor

鄂尔多斯高原北部一年两季燕麦种植模式生产性能评价

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草业学报 2024年第1期33卷 159-168页

作者：李文龙李峰张仲鹃王殿清王欢靳慧卿特木热胡志玲陶雅中国农业科学院草原研究所农业农村部饲草高效生产模式创新重点实验室内蒙古呼和浩特010010 黑龙江飞鹤乳业有限公司创新中心北京100015 呼和浩特市农牧技术推广中心内蒙古呼和浩特010010 巴彦淖尔市农牧局内蒙古巴彦淖尔015000 赤峰市宁城县农牧局内蒙古赤峰024200

为了筛选出适宜鄂尔多斯高原北部一年两季种植的优良燕麦品种,优化种植模式,以提高土地利用效率,增加经济效益,本研究分别对鄂尔多斯高原北部第一、二季种植的6个国内外燕麦品种的产量性状和营养品质进行了监测分析,并应用灰色关联度法... 详细信息

为了筛选出适宜鄂尔多斯高原北部一年两季种植的优良燕麦品种,优化种植模式,以提高土地利用效率,增加经济效益,本研究分别对鄂尔多斯高原北部第一、二季种植的6个国内外燕麦品种的产量性状和营养品质进行了监测分析,并应用灰色关联度法对不同品种燕麦在该地区的生产性能进行了综合评价。结果表明,第一、二季不同燕麦品种的株高、干草产量、粗蛋白(CP)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、钾(K)以及相对饲草质量(RFQ)的变化范围分别是96.77~121.77 cm、8426.38~14287.07 kg·hm^(-2)、8.19%~9.29%DM、51.47%~59.90%DM、30.00%~35.83%DM、1.23%~1.87%、117.88~161.41和68.73~97.20 cm、4927.07~7082.58 kg·hm^(-2)、12.12%~16.34%DM、39.60%~46.61%DM、19.49%~24.26%DM、1.67%~1.94%、206.09~262.64;除第一季燕麦粗蛋白含量外,各评价指标在不同品种间存在显著差异(P0.05),其中第一季中品种太阳神的株高、NDF及ADF含量均高于其他品种,但其RFQ低于其他品种,而品种领袖的干草产量最大且K含量最低;第二季中品种青引1号的株高和干草产量均位列第一,其NDF、ADF含量居最高,贝勒的CP含量高于其他品种,青燕1号的K含量低于其他品种;株高及干、鲜草产量与CP、K、RFQ呈显著(P0.05)或极显著(P0.01或P0.001)负相关,与NDF、ADF呈极显著正相关(P0.001)。灰色关联度分析结果表明,各指标中NDF和RFQ的权重系数位列前二位,为该地区燕麦生产性能评价的重要指标;最适宜在鄂尔多斯高原北部地区作为第一季春播生产和第二季复种的燕麦品种分别为领袖和青燕1号,第一季春播领袖+第二季复种青燕1号的种植模式可在该地区以及同类型区域作为主推模式推广种植。

关键词：鄂尔多斯高原一年两季饲用燕麦生产力营养成分

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