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21世纪畜牧业在提高人类生活水平中的作用 被引量:4
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作者 In k.han 蒋满喜 杜立新 《国外畜牧科技》 1999年第2期2-6,共5页
1996年世界人口为57亿,预计2020年将会高达79亿。人口的快速增长将会导致诸如营养不良和环境破坏等许多社会问题。全世界有9亿多人口因粮食总产量不足和农作物分配不均衡而导致营养不良。可利用的畜产品将对解决以上问题... 1996年世界人口为57亿,预计2020年将会高达79亿。人口的快速增长将会导致诸如营养不良和环境破坏等许多社会问题。全世界有9亿多人口因粮食总产量不足和农作物分配不均衡而导致营养不良。可利用的畜产品将对解决以上问题起到关键性作用。本文主要回顾20世... 展开更多
关键词 畜牧业 21世纪 生活水平
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一种用于结构动态过程数值模拟的广义有限元法 被引量:3
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作者 王福军 黎耀军 +1 位作者 k.han Y.T.Feng 《中国科学(G辑)》 CSCD 2006年第4期427-436,共10页
提出了一种能同时处理连续体和离散体动态过程的有限元法.该法通过构造接触力模型,将传统的离散元当做标准的一节点有限单元来看待.新构造的一节点单元与常规有限单元具有同样物理特征,包括应力和应变.从而,将离散元算法与有限元算法紧... 提出了一种能同时处理连续体和离散体动态过程的有限元法.该法通过构造接触力模型,将传统的离散元当做标准的一节点有限单元来看待.新构造的一节点单元与常规有限单元具有同样物理特征,包括应力和应变.从而,将离散元算法与有限元算法紧密结合在一起,形成了统一的、与现有有限元系统兼容的广义有限元计算模型.这种模型不仅简化了计算过程,还可最大限度地发挥现有有限元代码的功能.数值算例表明,新方法可以更加有效地模拟大量离散体与连续体相互作用的复杂动力学过程. 展开更多
关键词 有限元法 离散元法 结构动力学 数值模拟
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A fiber optoacoustic guide with augmented reality for precision breastconserving surgery 被引量:4
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作者 Lu Lan Yan Xia +7 位作者 Rui Li kaiming Liu Jieying Mai Jennifer Anne Medley Samilia Obeng-Gyasi Linda k.han Pu Wang Ji-Xin Cheng 《Light(Science & Applications)》 SCIE EI CAS CSCD 2018年第1期1014-1024,共11页
Lumpectomy,also called breast-conserving surgery,has become the standard surgical treatment for early-stage breast cancer.However,accurately locating the tumor during a lumpectomy,especially when the lesion is small a... Lumpectomy,also called breast-conserving surgery,has become the standard surgical treatment for early-stage breast cancer.However,accurately locating the tumor during a lumpectomy,especially when the lesion is small and nonpalpable,is a challenge.Such difficulty can lead to either incomplete tumor removal or prolonged surgical time,which result in high re-operation rates(~25%)and increased surgical costs.Here,we report a fiber optoacoustic guide(FOG)with augmented reality(AR)for sub-millimeter tumor localization and intuitive surgical guidance with minimal interference.The FOG is preoperatively implanted in the tumor.Under external pulsed light excitation,the FOG omnidirectionally broadcasts acoustic waves through the optoacoustic effect by a specially designed nano-composite layer at its tip.By capturing the acoustic wave,three ultrasound sensors on the breast skin triangulate the FOG tip’s position with 0.25-mm accuracy.An AR system with a tablet measures the coordinates of the ultrasound sensors and transforms the FOG tip’s position into visual feedback with<1-mm accuracy,thus aiding surgeons in directly visualizing the tumor location and performing fast and accurate tumor removal.We further show the use of a head-mounted display to visualize the same information in the surgeons’first-person view and achieve hands-free guidance.Towards clinical application,a surgeon successfully deployed the FOG to excise a“pseudo tumor”in a female human cadaver.With the high-accuracy tumor localization by FOG and the intuitive surgical guidance by AR,the surgeon performed accurate and fast tumor removal,which will significantly reduce re-operation rates and shorten the surgery time. 展开更多
关键词 SURGERY FIBER intuitive
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肉毒碱对早期断奶仔猪的作用 被引量:2
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作者 In k.han 陈勇 曹光辛 《国外畜牧科技》 1999年第2期10-11,共2页
肉毒碱对能量代谢的重要作用是在β-氧化时促进脂肪酸的转运。肉毒碱能改善新生仔猪对能量的利用效率,提高断奶仔猪的生产性能以及母猪的繁殖性能。但是,肉毒碱的作用仍有争议,这可能与动物的年龄、体重、日粮组成和环境条件等因素... 肉毒碱对能量代谢的重要作用是在β-氧化时促进脂肪酸的转运。肉毒碱能改善新生仔猪对能量的利用效率,提高断奶仔猪的生产性能以及母猪的繁殖性能。但是,肉毒碱的作用仍有争议,这可能与动物的年龄、体重、日粮组成和环境条件等因素有关。此外,肉毒碱的作用模式和猪在各生长阶段的最佳添加量还不清楚,需要进一步研究。 展开更多
关键词 肉毒碱 新生仔猪 早期断奶仔猪
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不同性别生长猪所需最佳苏氨酸与赖氨酸比率 被引量:2
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作者 陈红平 周作红 +4 位作者 W.H.Chang J.H.lee k.N.Paik In k.han 《江西饲料》 2002年第6期29-33,共5页
本研究通过调查苏氨酸与赖氨酸的比率对猪生长性能、表观可消化能和血液尿素氮(BUN)浓度的影响,估测生长阉公猪和小母猪所需最佳苏氨酸与赖氨酸的比率。试验采用150头杂交猪(长白×约克夏×杜洛克,平均体重为16.75±0.45,... 本研究通过调查苏氨酸与赖氨酸的比率对猪生长性能、表观可消化能和血液尿素氮(BUN)浓度的影响,估测生长阉公猪和小母猪所需最佳苏氨酸与赖氨酸的比率。试验采用150头杂交猪(长白×约克夏×杜洛克,平均体重为16.75±0.45,其中阉公猪75头,小母猪75头),按2×3析因设计,随机分成6个处理:阉公猪日粮含赖氨酸1.12%,按苏氨酸与赖氨酸比率为50%、60%和70%分成3个处理:小母猪日粮含赖氨酸1.33%,按苏氨酸与赖氨酸比率为50%、60%和70%分成3个处理。经整个试验期(体重从16至56)。在平均日增重、平均日采食量和饲料转化率方面,动物性别和苏氨酸与赖氨酸比率之间无相互影响。在生长性能方面,有明显的性别影响:与小母猪相比,阉公猪表现出较好的生长性能,消耗较多的饲料(P<0.01)以及生长的较快(P<0.01)。随着苏氨酸与赖氨酸比率的增大,阉公猪的ADG和FCR有增加的倾向,但差异不显著。在除粗灰分(CA)外的可消化性养分方面,动物性别和苏氨酸与赖氨酸比率之间无相互影响。在性别之间,除小母猪对钙具有较高的可消化性(P<0.01)外,可消化性养分没有存在的差异。而日粮苏氨酸与赖氨酸比率对可消化性养分无影响。可消化性必需氨基酸(EEA)、非必需氨基酸(NEAA)和总氨基酸(TTA)的平均值没有受到性别和苏氨酸与赖氨酸比率的影响。没? 展开更多
关键词 性别 生长猪 苏氨酸 赖氨酸 比率 可消化性氨基酸
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加钒对高碳钢内珠光体形核和长大的影响 被引量:1
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作者 k.han T.D.Mottishaw 吴根土 《浙江冶金》 1997年第1期61-68,共8页
研究了加钒对高碳钢显微组织的影响,用分辨率高的金相技术仔细地检测了奥氏体分解的初期情况,进一步证实了加钒会促使形成晶界铁素体膜,甚至在共析成份范围内亦然,证明了这种铁素体是共析转变的产物,而不是先共析铁素体。这是因为首次... 研究了加钒对高碳钢显微组织的影响,用分辨率高的金相技术仔细地检测了奥氏体分解的初期情况,进一步证实了加钒会促使形成晶界铁素体膜,甚至在共析成份范围内亦然,证明了这种铁素体是共析转变的产物,而不是先共析铁素体。这是因为首次转变是碳化物微粒沿晶界形核,这些碳化物基本上等同于渗碳体。看来,钒的存在改变了晶界渗碳体的形貌和分布,而不是使其形成网状物,这些渗碳体以细小弥散的微粒形态密布于晶界上。认为出现这种现象的原因是因为钒增大了渗碳体的形核驱动力。晶界渗碳体的形成要消耗周围的碳,从而促进铁素体的形成,但由于这些渗碳体是不连续的、呈微细弥散状,因而被数量更多的铁素体相所淹没。在这样的区域里,晶粒完全同步长大制度的起点被推迟,以后就在铁素体和奥氏体界面生成珠光体。 展开更多
关键词 高碳钢 显微组织 珠光体 形核
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Predictive value of pituitary tumor morphology on outcomes and complications in endoscopic transsphenoidal surgery 被引量:1
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作者 Andrew T.Heffernan Joseph k.han +6 位作者 John Campbell James Reese William G.Day Joshua Edwards Ran V.Singh Wylie Zhu kent k.Lam 《World Journal of Otorhinolaryngology-Head and Neck Surgery》 2022年第4期321-329,共9页
Purpose:Endoscopic transsphenoidal surgery(ETSS)is an increasingly utilized approach for resection of pituitary tumors.Prior studies have evaluated preoperative tumor size,location,and extent as prognostic factors for... Purpose:Endoscopic transsphenoidal surgery(ETSS)is an increasingly utilized approach for resection of pituitary tumors.Prior studies have evaluated preoperative tumor size,location,and extent as prognostic factors for surgical resection.There is little data on the relationship between preoperative pituitary tumor radiographic morphology and surgical outcomes.Study Design:Retrospective longitudinal study.Setting:Single tertiary care institution.Subjects and Methods:Preoperative magnetic resonance imaging and computed tomography scans from patients undergoing ETSS for pituitary tumor resections from 2007 to 2017 were retrospectively evaluated.A neuroradiologist classified these pituitary tumors into six morphologic groups,each defined by volume,dimensions,extension,and shape.Surgical difficulty,rates of incomplete resection,and postoperative complications were then stratified in relation to the morphologic groups.Results:Pituitary tumors from 131 patients were classified from preoperative imaging into six characteristic morphologies:(1)microtumor,(2)round,(3)transverse oblong,(4)superior-inferior oblong,(5)bilobed,and(6)large lobulated.Tumors that were characterized with the large lobulated,bilobed,and transverse oblong morphologies correlated with higher rates of postoperative evidence of residual tumor(70%,36%,and 47%,respectively,all P<0.002).Likewise,large lobulated,bilobed,and transverse oblong morphologies were also associated with intraoperative cerebrospinal fluid leaks(70%,31%,and 35%,respectively,all P<0.05).Conclusions:We describe a novel descriptive system for the morphology of pituitary tumors that can be determined from preoperative imaging.Different tumor morphologic groups are associated with varying degrees of gross tumor resection,complications,and surgical difficulty.Utilizing pituitary tumor morphology may aid surgeons in planning the extent of resection,need for complex closure,and patient counseling. 展开更多
关键词 endoscopic transsphenoidal surgery MORPHOLOGY pituitary adenoma pituitary tumor surgical outcomes tumor shape
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肉毒碱对早期断奶仔猪的作用 被引量:1
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作者 陈勇 In k.han J.H.kim 《国外畜牧学(饲料)》 1999年第2期30-31,共2页
肉毒碱对能量代谢的重要作用是在β-氧化时促进脂肪酸的转运。试验证明,肉毒碱能改善新生仔猪对能量的利用效率,提高断奶仔猪的生产性能以及母猪的繁殖性能。但是,肉毒碱的作用仍有争议,这可能与动物的年龄、体重、日粮组成和环境条件... 肉毒碱对能量代谢的重要作用是在β-氧化时促进脂肪酸的转运。试验证明,肉毒碱能改善新生仔猪对能量的利用效率,提高断奶仔猪的生产性能以及母猪的繁殖性能。但是,肉毒碱的作用仍有争议,这可能与动物的年龄、体重、日粮组成和环境条件等因素有关。此外,肉毒碱的作用模式和猪在每一生长阶段的最佳添加量还不清楚,需要更多的试验以确认其在猪营养中的重要性。 展开更多
关键词 肉毒碱 初生仔猪 断奶仔猪 生产性能 仔猪
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Modelling of Magnetorheological Fluids with Combined Lattice Boltzmann and Discrete Element Approach
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作者 k.han Y.T.Feng D.R.J.Owen 《Communications in Computational Physics》 SCIE 2010年第5期1095-1117,共23页
A combined lattice Boltzmann and discrete element approach is proposedfor numerical modelling of magnetorheological fluids. In its formulation, the particledynamics is simulated by the discrete element method, while t... A combined lattice Boltzmann and discrete element approach is proposedfor numerical modelling of magnetorheological fluids. In its formulation, the particledynamics is simulated by the discrete element method, while the fluid field is resolvedwith the lattice Boltzmann method. The coupling between the fluid and the particlesare realized through the hydrodynamic interactions. Procedures for computing magnetic, contact and hydrodynamic forces are discussed in detail. The applicability ofthe proposed solution procedure is illustrated via a two-stage simulation of a MR fluidproblem with four different particle volume fractions. At the first stage, simulationsare performed for the particle chain formation upon application of an external magnetic field;and at the second stage, the rheological properties of the MR fluid underdifferent shear loading conditions are investigated with the particle chains establishedat the first stage as the initial configuration. 展开更多
关键词 Magnetorheological fluids particle dynamics rheological properties magnetic interaction models lattice Boltzmann method discrete element method
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Effects of Source of Inorganic Phosphorus and Phytase Supplementation on Performance,Physiological Parameters and Bone Mineralization in Broilers
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作者 W.I.Lee P.A.Thacker Y.k.han 《Journal of Animal Science and Biotechnology》 SCIE CAS 2010年第1期15-24,共10页
The objective of this study was to eval- uate the effects of inorganic phosphorus source and phytase addition on performance, nutrient digestibility and bone mineralization in broiler chickens. In Exp. 1,150 two-day o... The objective of this study was to eval- uate the effects of inorganic phosphorus source and phytase addition on performance, nutrient digestibility and bone mineralization in broiler chickens. In Exp. 1,150 two-day old, male broiler chicks were fed a corn-soybean meal basal diet supplemented with phos- phorus provided by dicalcium phosphate, tricalcium phosphate or defluorinated rock phosphate. Five cages containing 10 birds were allotted to each of the three treatments. In Exp. 2,120 three-day old, male broiler chicks were fed the basal diet from Exp. 1 supplemen- ted with 0,250,500 ,or 1,000 P-'rU phytase per kg of diet. Six cages containing five chicks were allotted to each of the four treatments. In Exp. 1, there was no difference in weight gain, feed intake or feed conver- sion as a result of feeding the different sources of in- organic phosphorus. The digestibility of phosphorus was significantly lower (P =0.01 ) for chicks fed di- ets supplemented with tricalcium phosphate than for chicks fed the other two diets. However, despite the lower digestibility, serum phosphorus levels did not differ among the three treatments. For Exp. 2, feedconversion showed a linear improvement (P = 0.03 ) with increasing levels of phytase inclusion ( days 0 to 33 ). Phytase supplementation resulted in linear increa- ses in the digestibility of dry matter (P = 0.02 ), crude protein ( P --- 0.04 ) and energy ( P 〈 0.01 ). Chicks fed 1,000 FTU/kg phytase had significantly higher bone calcium ( P = 0.05 ) and bone breaking strength (P = 0.04 ) than chicks fed the basal diet on day 33. In conclusion, the results of the current study indicated that the performance of birds fed diets sup- plemented with dicalcium phosphate, tricalcium phos- phate or defluorinated phosphate was similar and therefore production costs could be lowered by choo- sing the cheapest inorganic phosphorus source when formulating diets for poultry. When diets were formu- lated to meet dietary phosphorus requirements, the gr 展开更多
关键词 bone strength BROILERS DIGESTIBILITY inorganic phosphorus PERFORMANCE PHYTASE
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复合材料的疲劳——疲劳模量的概念和寿命预测
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作者 W.Hwang k.S.han 陈忠安 《石家庄铁道大学学报(自然科学版)》 1987年第4期91-96,共6页
本文解析地研究了玻璃纤维增强树脂复合材料的疲劳特性。采用了一个称作“疲劳模量”的新概念,它被定义为在一特定循环时施加应力和所产生应变的斜率。疲劳模量降级研究是在假定疲劳模量降级遵从疲劳循环的幂函数的条件下进行的。利用... 本文解析地研究了玻璃纤维增强树脂复合材料的疲劳特性。采用了一个称作“疲劳模量”的新概念,它被定义为在一特定循环时施加应力和所产生应变的斜率。疲劳模量降级研究是在假定疲劳模量降级遵从疲劳循环的幂函数的条件下进行的。利用疲劳模量及其降级速率,建立了预测疲劳寿命的理论方程。为了实际应用,根据应变断裂准则对这个关系式作了简化。经证明。 展开更多
关键词 寿命预测 疲劳寿命 疲劳断裂 树脂复合材料 玻璃纤维增强 疲劳特性 断裂准则 预测材料 循环载荷 理论方程
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PPSV-23与PCV-7在慢性阻塞性肺疾病患者中的免疫应答比较
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作者 Mark T.Dransfield Moon H.Nahm Mei Lan khan 《中国处方药》 2009年第10期44-44,共1页
背景及目的:23价肺炎球菌多糖疫苗(PPSV23)所产生抗体对于慢性阻塞性肺疾病(COPD)的免疫原性和预防效应存在争议。之前的研究发现,7价多糖蛋白结合疫苗(PCV-7)在健康中老年人中产生的免疫反应强于PPSV23。本研究对这两种疫苗在C... 背景及目的:23价肺炎球菌多糖疫苗(PPSV23)所产生抗体对于慢性阻塞性肺疾病(COPD)的免疫原性和预防效应存在争议。之前的研究发现,7价多糖蛋白结合疫苗(PCV-7)在健康中老年人中产生的免疫反应强于PPSV23。本研究对这两种疫苗在COPD患者中的免疫应答进行比较。 展开更多
关键词 慢性阻塞性肺疾病患者 免疫应答 23价肺炎球菌多糖疫苗 慢性阻塞性肺疾病(COPD) 多糖蛋白结合疫苗 健康中老年人 COPD患者 预防效应
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STCF conceptual design report (Volume 1): Physics & detector 被引量:3
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作者 M.Achasov X.C.Ai +163 位作者 L.P.An R.Aliberti Q.An X.Z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko Z.H.Bu F.M.Cai H.Cai J.J.Cao Q.H.Cao X.Cao Z.Cao Q.Chang k.T.Chao D.Y.Chen H.Chen H.X.Chen J.F.Chen k.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen Y.Chen Y.Q.Chen H.Y.Cheng J.Cheng S.Cheng T.G.Cheng J.P.Dai L.Y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko J.M.Dias D.Z.Ding L.Y.Dong W.H.Dong V.Druzhinin D.S.Du Y.J.Du Z.G.Du L.M.Duan D.Epifanov Y.L.Fan S.S.Fang Z.J.Fang G.Fedotovich C.Q.Feng X.Feng Y.T.Feng J.L.Fu J.Gao Y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo F.k.Guo J.C.Guo J.Guo Y.P.Guo Z.H.Guo A.Guskov k.L.han L.han M.han X.Q.Hao J.B.He S.Q.He X.G.He Y.L.He Z.B.He Z.X.Heng B.L.Hou T.J.Hou Y.R.Hou C.Y.Hu H.M.Hu k.Hu R.J.Hu W.H.Hu X.H.Hu Y.C.Hu J.Hua G.S.Huang J.S.Huang M.Huang Q.Y.Huang W.Q.Huang X.T.Huang X.J.Huang Y.B.Huang Y.S.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia S.Jia Z.k.Jia H.B.Jiang J.Jiang S.Z.Jiang J.B.Jiao Z.Jiao H.J.Jing X.L.kang X.S.kang B.C.ke M.kenzie A.khoukaz I.koop E.kravchenko A.kuzmin Y.Lei E.Levichev C.H.Li C.Li D.Y.Li F.Li G.Li G.Li H.B.Li H.Li H.N.Li H.J.Li H.L.Li J.M.Li J.Li L.Li L.Li L.Y.Li N.Li P.R.Li R.H.Li S.Li T.Li W.J.Li X.Li X.H.Li X 《Frontiers of physics》 SCIE CSCD 2024年第1期1-154,共154页
The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics community.It is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of... The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics community.It is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or higher.The STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard Model.The STCF project in China is under development with an extensive R&D program.This document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&D and physics case studies. 展开更多
关键词 electron–positron collider tau-charm region high luminosity STCF detector conceptual design
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Amplitude analysis of the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)
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作者 M.Ablikim M.N.Achasov +146 位作者 P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya k.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.F.Chang W.L.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen M.L.Chen S.J.Chen S.L.Chen S.M.Chen T.Chen X.R.Chen X.T.Chen Y.B.Chen Y.Q.Chen Z.J.Chen Z.Y.Chen S.k.Choi X.Chu G.Cibinetto F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori B.Fang S.S.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng Y.T.Feng k.Fischer M.Fritsch C.D.Fu J.L.Fu Y.W.Fu H.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia P.T.Ge Z.W.Ge C.Geng E.M.Gersabeck B.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong M.Y.Dong X.Dong M.C.Du S.X.Du Z.H.Duan P.Egorov Y.H.Fan J.Fang JA.Gilman k.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.H.Gu Y.T.Gu C.Y.Guan Z.L.Guan A.Q.Guo L.B.Guo M.J.Guo R.P.Guo Y.P.Guo A.Guskov J.Gutierrez k.L.han T.T.han X.Q.Hao F.A.Harris k.k.He k.L.He F.H.Heinsius C.H.Heinz Y.k.Heng C.Herold T.Holtmann P.C.Hong G.Y.Hou X.T.Hou Y.R.Hou Z.L.Hou B.Y.Hu H.M.Hu J.F.Hu T.Hu Y.Hu G.S.Huang k.X.Huang L 《Chinese Physics C》 SCIE CAS CSCD 2024年第8期6-33,共28页
Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the BESIII detector,a joint amplitude analysis is performed on the decays... Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the BESIII detector,a joint amplitude analysis is performed on the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).The fit fractions of individual components are obtained,and large interferences among the dominant components of the decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(S)are observed in both channels.With the obtained amplitude model,the CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,respectively.The branching fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,respectively.The amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D^(0)→4πwhen used to determine the CKM angleγ(ϕ_(3))via the B^(−)→DK^(−)decay. 展开更多
关键词 BESIII D^(0)meson decays amplitude analysis CP-even fraction
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Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024
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作者 M.Ablikim M.N.Achasov +146 位作者 P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya k.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.F.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen H.Y.Chen M.L.Chen S.J.Chen S.L.Chen S.M.Chen T.Chen X.R.Chen X.T.Chen Y.B.Chen Y.Q.Chen Z.J.Chen Z.Y.Chen S.k.Choi G.Cibinetto F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori B.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong M.Y.Dong X.Dong M.C.Du S.X.Du Y.Y.Duan Z.H.Duan P.Egorov Y.H.Fan J.Fang J.Fang S.S.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng Y.T.Feng M.Fritsch C.D.Fu J.L.Fu Y.W.Fu H.Gao X.B.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia L.Ge P.T.Ge Z.W.Ge C.Geng E.M.Gersabeck A.Gilman k.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.H.Gu Y.T.Gu C.Y.Guan A.Q.Guo L.B.Guo M.J.Guo R.P.Guo Y.P.Guo A.Guskov J.Gutierrez k.L.han T.T.han F.hanisch X.Q.Hao F.A.Harris k.k.He k.L.He F.H.Heinsius C.H.Heinz Y.k.Heng C.Herold T.Holtmann P.C.Hong G.Y.Hou X.T.Hou Y.R.Hou Z.L.Hou B.Y.Hu H.M.Hu J.F.Hu S.L.Hu T.Hu Y.Hu G.S.Huang 《Chinese Physics C》 SCIE CAS CSCD 2024年第12期1-10,共10页
We present a measurement of the integrated luminosity of e^(+)e^(-)collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm=3.773 GeV.The integrated luminosities of the ... We present a measurement of the integrated luminosity of e^(+)e^(-)collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm=3.773 GeV.The integrated luminosities of the datasets taken from December 2021 to June 2022,from November 2022 to June 2023,and from October 2023 to February 2024 were determined to be 4.995±0.019 fb^(-1),8.157±0.031 fb^(-1),and 4.191±0.016 fb^(-1),respectively,by analyzing large angle Bhabha scattering events.The uncertainties are dominated by systematic effects,and the statistical uncertainties are negligible.Our results provide essential input for future analyses and precision measurements. 展开更多
关键词 Bhabha scattering events integrated luminosity CROSS-SECTION
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Determination of the number ofψ(3686)events taken at BESⅢ
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作者 M.Ablikim M.N.Achasov +147 位作者 P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya k.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.F.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen H.Y.Chen M.L.Chen S.J.Chen S.L.Chen S.M.Chen T.Chen X.R.Chen X.T.Chen Y.B.Chen Y.Q.Chen Z.J.Chen Z.Y.Chen S.k.Choi G.Cibinetto F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori B.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong M.Y.Dong X.Dong M.C.Du S.X.Du Y.Y.Duan Z.H.Duan P.Egorov Y.H.Fan J.Fang J.Fang S.S.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng Y.T.Feng M.Fritsch C.D.Fu J.L.Fu Y.W.Fu H.Gao X.B.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia L.Ge P.T.Ge Z.W.Ge C.Geng E.M.Gersabeck A.Gilman k.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna M.Greco M.H.Gu Y.T.Gu C.Y.Guan Z.L.Guan A.Q.Guo L.B.Guo M.J.Guo R.P.Guo Y.P.Guo A.Guskov J.Gutierrez k.L.han T.T.han F.hanisch X.Q.Hao F.A.Harris k.k.He k.L.He F.H.Heinsius C.H.Heinz Y.k.Heng C.Herold T.Holtmann P.C.Hong G.Y.Hou X.T.Hou Y.R.Hou Z.L.Hou B.Y.Hu H.M.Hu J.F.Hu S.L.Hu T.Hu Y.Hu G. 《Chinese Physics C》 SCIE CAS CSCD 2024年第9期8-20,共13页
The number ofψ(3686)events collected by the BESⅢdetector during the 2021 run period is determined to be(2259.3±11.1)×10~6 by counting inclusiveψ(3686)hadronic events.The uncertainty is systematic and the ... The number ofψ(3686)events collected by the BESⅢdetector during the 2021 run period is determined to be(2259.3±11.1)×10~6 by counting inclusiveψ(3686)hadronic events.The uncertainty is systematic and the statistical uncertainty is negligible.Meanwhile,the numbers ofψ(3686)events collected during the 2009 and 2012run periods are updated to be(107.7±0.6)×10~6 and(345.4±2.6)×10~6,respectively.Both numbers are consistent with the previous measurements within one standard deviation.The total number ofψ(3686)events in the three data samples is(2712.4±14.3)×10~6. 展开更多
关键词 ψ(3686) inclusive process Hadronic events BESⅢdetector
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合成乳腺X线摄影和数字乳腺X线摄影与数字乳腺断层成像联合或单独成像对于微钙化的检测和分类效能比较 被引量:9
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作者 J.S.Choi B.k.han +5 位作者 E.Y.ko G.R.kim E.S.ko k.W.Park 庄白燕(译) 陈秀玉(校) 《国际医学放射学杂志》 北大核心 2019年第2期246-246,共1页
目的比较合成乳腺X线摄影(SM)和数字乳腺X线摄影(DM)与数字乳腺断层成像(DBT)联合或单独使用时评估微钙化的效能。方法本回顾性研究包括2013年1月—2013年10月的198例乳腺X线摄影病例,均有DM、SM和DBT影像。
关键词 微钙化 断层成像
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巴西橡胶树胶乳基因表达
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作者 k.H.han 田郎 《世界热带农业信息》 2009年第11期1-9,共9页
天然橡胶(顺式-1,4-聚异戊二烯)是巴西橡胶树(Hevea brasiliensis Muell.Arg.)乳管中合成的一种具有众多工业用途的高分子聚合物。就胶乳中的特异性或高丰度基因而言,它们在橡胶生物合成中可能起着十分重要的作用。本研究构建了来自巴... 天然橡胶(顺式-1,4-聚异戊二烯)是巴西橡胶树(Hevea brasiliensis Muell.Arg.)乳管中合成的一种具有众多工业用途的高分子聚合物。就胶乳中的特异性或高丰度基因而言,它们在橡胶生物合成中可能起着十分重要的作用。本研究构建了来自巴西橡胶树胶乳的cDNA文库,并通过cDNA克隆的单向部分测序对胶乳中基因的表达进行了研究。通过序列分析共鉴定出245个表达序列标签(ESTs),其中57%与公共数据库中的已有序列具有不同程度的同源性。 展开更多
关键词 生物合成 EST 遗传工程 橡胶
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