mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Rolling element bearing instantaneous rotational frequency estimation based on EMD soft-thresholding denoising and instantaneous fault characteristic frequency

The accurate estimation of the rolling element bearing instantaneous rotational frequency (IRF) is the key capability of the order tracking method based on time-frequency analysis. The rolling element bearing IRF can be accurately estimated according to the instantaneous fault characteristic frequency(IFCF). However, in an environment with a low signal-to-noise ratio (SNR), e.g., an incipient fault or function at a low speed, the signal contains strong background noise that seriously affects the effectiveness of the aforementioned method. An algorithm of signal preprocessing based on empirical mode decomposition (EMD) and wavelet shrinkage was proposed in this work. Compared with EMD denoising by the cross-correlation coefficient and kurtosis(CCK) criterion, the method of EMD soft-thresholding (ST) denoising can ensure the integrity of the signal, improve the SNR, and highlight fault features. The effectiveness of the algorithm for rolling element bearing IRF estimation by EMD ST denoising and the IFCF was validated by both simulated and experimental bearing vibration signals at a low SNR.
Improved estimation of rotor position for sensorless control of a PMSM based on a sliding mode observer

This work proposes a new strategy to improve the rotor position estimation of a permanent magnet synchronous motor (PMSM) over wide speed range. Rotor position estimation of a PMSM is performed by using sliding mode observer (SMO). An adaptive observer gain was designed based on Lyapunov function and applied to solve the chattering problem caused by the discontinuous function of the SMO in the wide speed range. The cascade low-pass filter (LPF) with variable cut-off frequency was proposed to reduce the chattering problem and to attenuate the filtering capability of the SMO. In addition, the phase shift caused by the filter was counterbalanced by applying the variable phase delay compensation for the whole speed area. High accuracy estimation result of the rotor position was obtained in the experiment by applying the proposed estimation strategy.
Internal carotid artery agenesis with stenosed intercavernous anastomosis: a case report

We report a rare case of internal carotid artery agenesis with stenosed intercavernous anastomosis. A 59-yearold male patient presented with a new infarction in the left basal ganglia. Magnetic resonance angiography and cerebral angiography showed that the right internal carotid artery disappeared from the origin to the foramen lacerum segment, and there was an anastomotic artery with severe stenosis passed through the floor of the sella and in front of the cavernous sinus. The right Al segment of the anterior cerebral artery was absent and A2 segment was supplied by the normal contralateral internal carotid artery via the anterior communicating artery.
Phenotypic research on senile osteoporosis caused by SIRT_6 deficiency

Osteoporosis is a serious public bone metabolic disease. However, the mechanisms underlying bone loss combined with ageing, which is known as senile osteoporosis, remains unknown. Here we show the detailed phenotype of this disease caused by SIRT_6 knock out(KO) in mice. To the best of our knowledge, this is the first study to reveal that SIRT_6 is expressed in both bone marrow stroma cells and bone-related cells in both mouse and human models, which suggests that SIRT_6 is an important regulator in bone metabolism. SIRT_6-KO mice exhibit a significant decrease in body weight and remarkable dwarfism. The skeleton of the SIRT_6-KO mouse is deficient in cartilage and mineralized bone tissue. Moreover, the osteocalcin concentration in blood is lower, which suggests that bone mass is markedly lost. Besides, the tartrate-resistant acid phosphatase 5b(TRAP5b) concentration is much higher, which suggests that bone resorption is overactive. Both trabecular and cortical bones exhibit severe osteopenia, and the bone mineral density is decreased. Moreover, double-labelling analysis shows that bone formation is much slower. To determine whether SIRT_6 directly regulates bone metabolism, we cultured primary bone marrow stromal cells for osteogenesis and osteoclastogenesis separately to avoid indirect interference in vivo responses such as inflammation. Taken together, these results show that SIRT_6 can directly regulate osteoblast proliferation and differentiation, resulting in attenuation in mineralization. Furthermore, SIRT_6 can directly regulate osteoclast differentiation and results in a higher number of small osteoclasts, which may be related to overactive bone resorption.
BAFF upregulates CD28/B7 and CD40/CD154 expression and promotes mouse T and B cell interaction in vitro via BAFF receptor

Aim: B cell-activating factor belonging to the TNF family(BAFF) is a member of TNF family and required for peripheral B cell survival and homeostasis. BAFF has been shown to promote the proliferation of T and B cells. In this study we examined whether and how BAFF mediated the interaction between mouse T and B cells in vitro. Methods: BAFF-stimulated B or T cells were co-cultured with T or B cells. The interactions between T and B cells were analyzed by measuring the expression of co-stimulatory molecules(CD28/CD80 or CD40/CD154), the proliferation and secretion of T and B cells and other factors. Two siRNAs against the transmembrane activator and calcium modulator and cyclophilin ligand interactor(TACI) and BAFF receptor(BAFF-R) were used to identify the receptors responsible for the actions of BAFF. Results: BAFF-stimulated B cells significantly promoted the proliferation and activity of co-cultured T cells, and increased the percentages of CD4~+CD28~+ and CD4~+CD154~+ T cells. Similarly, BAFF-stimulated T cells significantly promoted the proliferation and activity of co-cultured B cells, and increased CD19~+CD80~+ and CD19~+CD40~+ B cell subpopulations. BAFF-R siRNA-silenced B cells showed significantly lower expression of CD40 and CD80 than the control B cells. When the BAFF-R siRNA-silenced B cells were stimulated with BAFF, then co-cultured with T cells, the expression of CD28 and CD154 on T cells was not increased. TACI siRNAsilenced B cells exhibited higher expression of CD40 and CD80 than the control B cells. When the TACI siRNA-silenced B cells were stimulated with BAFF, then co-cultured with T cells, the expression of CD28 and CD154 on T cells was significantly increased. Conclusion: BAFF upregulates CD28/B7 and CD40/CD154 expression, and promotes the interactions between T and B cells in a BAFFR- dependent manner.
Cryptanalysis of Public Key Cryptosystems Based on Non-Abelian Factorization Problems

Advances in quantum computers threaten to break public-key cryptosystems (e.g., RSA, ECC, and EIGamal), based on the hardness of factoring or taking a discrete logarithm. However, no quantum algorithms have yet been found for solving certain mathematical problems in non-commutative algebraic structures. Recently, two novel public-key encryption schemes, BKT-B cryptosystem and BKT-FO cryptosystem, based on factorization problems have been proposed at Security and Communication Networks in 2013. In this paper we show that these two schemes are vulnerable to structural attacks and linearization equations attacks, and that they only require polynomial time complexity to obtain messages from associated public keys. We conduct a detailed analysis of the two attack methods and show corresponding algorithmic descriptions and efficiency analyses. In addition, we provide some improvement suggestions for the two public-key encryption schemes.
迟熟中籼杂交水稻新组合内6优816

内6优816系西南科技大学水稻研究所用内江市杂交水稻科技开发中心育成的不育系内6A与自育恢复系西科恢5616配组育成的迟熟中籼杂交水稻新组合,2013年通过四川省农作物品种审定委员会审定。
优质杂交稻新组合广8优188

广8优188是广东省农业科学院水稻研究所用自育的优质三系不育系广8A与恢复系GR188配组育成的感温型优质三系杂交稻新组合,生育期与粳籼89相当,丰产性突出,米质达到省标3级标准。2012年6月通过广东省农作物品种审定,审定编号为粤审稻2012035。
实现“三分田养活一个人”生产模式及配套栽培技术

通过超级杂交中稻+冬种马铃薯粮食周年生产模式及其高产栽培技术的应用,石门县连续3 a实现了“三分田养活一个人”的粮食高产科技攻关工程的预期目标。
丰两优晚三特征特性及作烟后稻高产栽培技术

2013—2015年在宣城市宣州区连续3 a建立丰两优晚三烟后稻6.67 hm~2高产示范片,根据3 a的栽培实践,对丰两优晚三特征特性及作烟后稻高产栽培技术进行了总结。
沼肥替代部分化肥对杂交水稻产量、土壤肥力及养分表观平衡的影响

通过田间试验,研究沼肥替代部分化肥后对杂交水稻产量、土壤肥力及农田养分表观平衡的影响。结果表明,相比减量施肥处理,随配施沼肥用量的增加,水稻产量呈先升高后下降的趋势;施用沼肥后农田有机质、有效磷、速效钾含量明显增加,氮、磷养分出现盈余,钾素亏缺降低;沼肥用量为16.50 t /hm~2时可减少30%的化肥用量。施用沼肥可以减少化肥投入,提高土壤养分含量,维持土壤养分平衡。
杂交水稻新组合天龙优1340高产制种技术

天龙优1340是四川西科种业股份有限公司天龙水稻研究所用自育不育系天龙13A与自育恢复系天龙恢140配组育成的杂交水稻新组合,2015年通过河南省农作物品种审定委员会审定。根据天龙优1340父母本的特征特性,总结了其高产制种技术。
关于加强中国热带农业科学院基础与应用基础研究的思考

基础研究是科学之本、技术之源。国家高度重视基础研究在科技革命和产业变革中的源头创新作用。《中共中央国务院关于深化体制机制改革加快实施创新驱动发展战略的若干意见》明确提出“要优化对基础研究的支持方式,切实加大对基础研究的财政投入,增加高等学校、科研院所原始创新能力”。面对新形势,坚持基础引领、加强自主创新是促进热带农业产业健康可持续发展的内在需求,更是中国热带农业科学院(以下简称“热科院”)建设世界一流热带农业科技创新中心的必经之路。本文主要从热科院承担国家自然科学基金(以下简称科学基金)项目入手,分析热科院基础与应用基础研究现状,提出加强热科院基础与应用基础的建议。
新闻导入科学解读

2014年7月,新华网与中国科协签订战略合作协议,并于同年11月共建“科普中国研发与传播基地”,以此为新的起点,新华网积极投身科普事业,成为推进科普信息化、打造“科普中国”品牌的先行者(图1)。
2015中国网民科普搜索需求行为分析报告

当今世界,以数字化、网络化、智能化为标志的信息技术革命日新月异,互联网成为创新驱动发展的先导力量,深刻改变着人们的生产生活,有力推动着社会发展,对国际政治、经济、文化、社会等领域发展产生深刻影响。截至2015年12月,中国网民规模达6.88亿,互联网发展带来信息的爆炸式增长,以及传播表达方式的多样性,使科学传播变得无比高效、方便快捷和充满乐趣,云计算、数据挖掘等现代信息技术的应用,使泛在、精准、交互式的科普服务成为现实。
跨平台覆盖管线生命周期的综合管线信息系统及其应用

随着经济的发展、城市规模的扩大和现代化程度的不断提高,作为城市生命线的地下管网也越来越庞大、密集,其种类也越来越繁多。以往国内绝大多数城市对地下管网缺乏系统的管理和长期的规划,从而导致全国范围内大大小小的管线事故频发,管线埋设重复施工情况严重。虽然根据?关于加强城市地下管线建设管理的指导意见?,所有县级以上城市都应建立综合管理信息系统,但从长远的眼光来看,卓有成效的城市综合管线系统应该不仅仅是对现有管线数据的普查管理,还需要城市从建设规划决策角度出发,能够便捷高效地对地下管线工程的设计、审批、施工、监管、维护等环节实现管理的全面化和自动化。因此,跨平台(PC端、移动端)覆盖管线整个生命周期的综合管线系统应运而生。
IT背景下地图制图专业本科教学改革探讨

IT技术在地理空间数据处理和可视化表达领域的渗透对高素质地图制图人才培养提出了迫切需要。本文围绕地图制图专业本科教育的学科定位、培养目标、教学内容建设、人才培养模式创新等方面进行了探讨,提出了与IT背景作深度融合,深化学科优势,发扬学科特色,培养创新型、创业型和创造型地图制图人才的教学改革建议。
Disruption of key GTPase regulators of endocytic recycling compartment does not interfere with soluble antigen crosspresentation in dendritic: cells

Crosspresentation is of vital significance to immune surveillance. External antigens, soluble or solid, enter cells via endo-phagocytic vesicles and are eventually delivered to MHC class I molecules on the cell surface. After antigen uptake, there are three proposed pathways leading to surface MHC class I/peptide complex presentation. Direct translocation into the cytosol to use the conventional proteasome/TAP-dependent ER peptide loading; phagosome autonomous presentation following fusion with selected ER components; and endocytic recycling whereby antigens are processed within the endosome and form a complex with internalized MHC class I, for redelivery back to cell surface. Endocytic recycling compartment (ERC), a major perinuclear tubular network considered critical for slow endosomal recycling, has been suggested to be one route for crosspresentation. This pathway is particularly relevant for soluble antigen presentation, as the former two routes are mostly used to describe particulate antigen processing, involving phagosomes. Here we report the unexpected finding that disruption of key regulatory factors of ERC, small GTPase proteins ARF6,Rabl la, and Rab22a, had no effect on soluble ovalbumin (OVA) crosspresentation in a model dendritic cell system.
Activation of NLRC4 downregulates TLR5-mediated antibody immune responses against flagellin

Bacterial flagellin is a unique pathogen-associated molecular pattern (PAMP),which can be recognized by surface localized Toll-like receptor 5 (TLR5) and the cytosolic NOD-like receptor (NLR) protein 4 (NLRC4) receptors. Activation of the TLR5 and/or NLRC4 signaling pathways by flagellin and the resulting immune responses play important roles in anti-bacterial immunity. However, it remains unclear how the dual activities of flagellin that activate the TLR5 and/or NLRC4 signaling pathways orchestrate the immune responses. In this study, we assessed the effects of flagellin and its mutants lacking the ability to activate TLR5 and NLRC4 alone or in combination on the adaptive immune responses against flagellin. Flagellin that was unable to activate NLRC4 induced a significantly higher antibody response than did wild-type flagellin. The increased antibody response could be eliminated when macrophages were depleted in vivo. The activation of NLRC4 by flagellin downregulated the flagellin-induced and TLR5-mediated immune responses against flagellin.
以双眼视神经炎为首发症状的新型隐球菌性脑膜炎一例报道

新型隐球菌性脑膜炎是由新型隐球菌感染脑膜和脑实质所致的中枢神经系统的亚急性或慢性炎性疾病,是中枢神经系统最常见的真菌感染。其起病较为隐袭,病程迁延,进展缓慢,早期症状不典型,约1/3患者有颅神经损害,其中少数患者表现为视神经损害。现将1例首诊为双眼视神经炎的新型隐球菌性脑膜炎病例报道如下。
腹腔镜胆总管切开一期缝合术后胆漏的原因及处理方法

胆漏是腹腔镜胆总管切开取石一期缝合术后患者的主要并发症。我们对解放军总医院2002年1月-2015年8月926例腹腔镜胆总管探查一期缝合手术患者的临床资料进行回顾分析,探讨了一期缝合术后胆漏的原因及处理措施。现报告如下。
多种信号通路在类风湿关节炎发病机制中的研究进展

RA是一种全身性的自身免疫病,以慢性滑膜炎症和侵蚀性关节炎为临床特征,可导致关节畸形,最终导致不同程度的残疾。由于RA确切的病因学及发病机制仍未明了,而且信号通路的研究一直是疾病研究的热点方向,它是认清疾病发生发展的关键步骤,为临床疾病的诊断、治疗提供依据,同时能为药物的开发特别是为新型生物制剂提供更安全、更特异的靶点。在该领域仍然有大量的临床和基础研究,包括分子免疫学、分子生物学、基因工程等方面。本文总结了近年来关于RA滑膜炎及骨破坏的信号通路方面的许多进展,诸如TLR/MyD88、Fas/FasL、NF-κB活化受体(RANK)/RANK配体(RANKL)、Wnt/β -catenin、骨形态发生蛋白(BMPs)/Smad、JAK/STAT、磷脂酰肌醇3激酶/AKT(PI3K/AKT)等,为临床医生更全面的了解和进行更深入的研究提供帮助。
新机种军事飞行员职业胜任特征指标体系及模型构建

随着我国军事航空飞行器日益快速发展,对飞行员的素质能力要求也更高。研究基于飞行职业胜任特征模型,从人力资源管理新视角思考新机种飞行员心理选拔的新方法、新技术,建立相适宜的心理选拔与考核、培养与评价机制,能够更大范围地选拔与高性能航空器发展相匹配的优秀潜质飞行人才,准确实现"人-岗”匹配,并逐步将其纳入军事临床航空医学标准体系。
电诊断正面临新的挑战

电诊断(electrodiagnosis)主要指神经传导测定和针电极肌电图,长期以来在神经肌肉疾病的诊断、鉴别诊断、疗效评估和预后判断中发挥着重要的作用。中华医学会神经病学分会肌电图与临床神经生理学组自成立以来,一直致力于电诊断技术的规范化和推广,并取得了一定的成绩。随着我国肌电图和神经电生理从业人员素质的不断提高,从事电诊断的神经科医生的比例也有明显的增加,肌电图在神经肌肉疾病诊断中的应用也开始受到重视。仅在2015年,肌电图与临床神经生理学组便和神经肌肉病学组联合,组织相关专家进行撰写和讨论,制定了6个有关神经肌肉疾病的诊断和治疗指南或共识,包括糖原累积病、线粒体病、脂质沉积性肌病、假肥大性肌营养不良、多发性肌炎和特发性面神经麻痹,并对2008年的肌电图规范化检测和临床应用共识和肌萎缩侧索硬化(ALS)治疗指南等进行了修订。2016年5月初,中华医学会神经病学分会在武汉召开的第十四届全国肌电图与临床神经电生理学术会议共有500多人参加,50%以上是临床医生。大会收到稿件234篇,其中50余篇进行了专题发言和论文交流,内容非常丰富。在本次大会上,电诊断与超声影像的结合是一个突出的亮点。
血管中心性胶质瘤1例

本例肿瘤周边伴局灶性皮质发育不良Ⅲ b型,属于双重病理现象,与Liu等的报道结果相似,致痫灶范围不仅局限于肿瘤,同时切除肿瘤和周边发育不良皮质可有效控制癫痫发作,将AG病灶和其他致痫灶完整切除后无需放、化疗,即可有效控制癫痫发作。
MBCMA股前外侧皮瓣临床应用指南(2016征求意见稿)

回顾显微外科的发展,新的手术和观念承先启后,代表着无数学者不懈地努力与探索。基于临床应用解剖学等基础医学和科学技术的发展,显微外科技术才得以不断发展,显微外科学理论才得以建立和完善,显微外科学科才得以创立。其中皮瓣外科是显微外科学中重要的一部分,有着丰富的内容,我国学者对此贡献巨大,如“中国皮瓣”、股前外侧皮瓣等。为了更好地推广、普及、规范和深化皮瓣的临床应用,促进我国皮瓣外科健康发展,中华医学会显微外科学分会(Microsurgery Branch of the Chinese Medical Association, MBCMA)委托《中华显微外科杂志》组织国内、外从事皮瓣研究的专家对一些临床应用已较多的、已较成熟的皮瓣进行讨论,形成"MBCMA皮瓣临床应用指南”。2016年3月16日至19日,在江苏省无锡市第九人民医院召开“股前外侧皮瓣临床应用适应证研讨会”,制定了“股前外侧皮瓣临床应用指南(2016征求意见稿)”,虽几经讨论成稿,但仍不甚完善,敬请广大同仁提出意见,为进一步的修订提供帮助,使之日臻完善。
T790M在非小细胞肺癌表皮生长因子受体-酪氨酸激酶抑制剂耐药中的角色

表皮生长因子受体(epidermal growth factor receptor,EGFR)酪氨酸激酶抑制剂(tyrosine kinase inhibitor, TKI)是肺癌治疗领域的里程碑,其使EGFR敏感突变的非小细胞肺癌(non-small cell lung cancer, NSCLC)患者无疾病进展期(progression free survival, PFS)延长,生活质量改善。但EGFR-TKI耐药不可避免,多出现在用药10个月左右,耐药已成为限制TKI临床应用的瓶颈。
儿童皮肤型Rosai-Dorfman病一例

讨论Rosai-Dorfman病(RDD)主要有两种类型,累及淋巴结及其他器官型(RDD)和仅局限于皮肤型(Cutaneous Rosai-Dorfman disease, CRDD)。与RDD相比,CRDD发病年龄更晚,有报道CRDD发病年龄中位数为43.5岁。皮损表现多样,孤立或多发,红色或暗红色丘疹、结节、斑块及银屑病样.类似环状肉芽肿的环状损害,也可表现为脓疱样、痤疮样皮损等。本病诊断主要依靠病理学检查,依据为噬淋巴细胞现象,免疫组化S100、CD68阳性及CDla阴性,以此特征可与网状组织细胞肉芽肿、幼年黄色肉芽肿、黄色瘤、 Langerhans细胞增多症及末走类组织细胞肉芽肿等疾病相鉴别。本患儿5岁发病,发病8年来仅累及皮肤.至今未发现其他器官受累,临床和病理表现均符合CRDD。本病有自愈的可能,Toledo等报告1例3岁男性CRDD患儿,未予治疗,随访6个月后皮损自愈。目前尚无规范治疗方案,本患者应用复方倍他米松注射液局部封闭治疗取得满意疗效。
克罗恩病与肠结核鉴别的风雨历程

CD已成为近十年消化领域最热门的话题,尽管对这一疾病的认识正逐渐加深,但困惑亦随之增加。一方面,困扰了人类数百年的结核病在中国依然猖獗,另一方面,CD患者例数却以相当惊人的速度在中国增加着。CD与肠结核临床表现惊人相似,但在某些处理措施上却截然相反,治疗CD的关键手段如免疫抑制剂、生物制剂,可使结核病复燃、播散,误诊误治会导致非常严重的后果,因此鉴别CD与肠结核意义重大。
不同方法监测全麻患者麻醉深度准确性的比较

全麻期间麻醉深度监测可预防知晓、苏醒延迟甚至神经功能损害的发生,利于改善转归。传统的麻醉深度监测常根据临床体征判断,准确性较差。随着脑电监测技术的发展,精确化麻醉得以实现。目前临床麻醉中常用的脑电监测指标有BIS、Narcotrend指数(NI)、意识指数(IoC1、IoC2)。这几种监测方法相比,监测麻醉深度的优势是否有差异尚有待研究。本研究拟比较BIS、NI、IoCl及IoC2监测全麻患者麻醉深度的准确性,为临床提供参考。
乳腺颗粒细胞瘤一例并文献复习

颗粒细胞瘤(granular cell tumor,GCT)是一种临床少见的软组织肿瘤,可发生于身体任何部位,临床上以卵巢、头颈部、胃肠道多见,原发于乳腺者不多,容易发生误诊、误治。笔者报道甘肃省肿瘤医院收治的1例乳腺颗粒细胞瘤,并结合既往文献总结其临床病理特点,以期能够加深对本病的认识。
医学检验危急值报告程序规范化专家共识

本建议描述了危急值报告体系相关术语和定义、文件和部分参考文献,对危急值项目选择程序危急值报告限确定程序、危急值识别与确认程序、危急值报告路径选择程序、危急值复查程序、危急值磺认/回读/记录程序、危急值报告体系评定程序给予建议。
中性盐雾环境中Q235钢板腐蚀率与表面特征参数的关系

为更全面地评价锈蚀钢材腐蚀发展程度,探讨钢材腐蚀后的损伤参量变化规律,通过对Q235钢板进行中性盐雾加速腐蚀,得到了钢板不同腐蚀程度下的质量损失率,并采用三维非接触式表面形貌仪测试腐蚀钢板表面,得到了钢板腐蚀后的孔洞率、平均腐蚀深度、最大腐蚀深度、表面三维粗糙度参数S_a及S_q等表面特征参数的相关数值,建立了腐蚀损伤参量的变化函数模型以及腐蚀率与表面特征参数关系式,可为材料耐蚀性研究提供基础数据。
IgG_4相关性疾病脏器损伤的临床特点、影像学及病理特征

IgG_4相关性疾病(IgG_4- related disease,IgG_4-RD)是一类新定义的可引起多器官炎症伴纤维化和硬化的疾病,以弥漫性或局灶性器官肿大为主要临床表现,伴或不伴血清IgG_4水平升高,典型组织学特征为淋巴浆细胞浸润、席纹状纤维化、闭塞性静脉炎及IgG_4~+浆细胞增多,应用糖皮质激素(以下简称激素)治疗有效。
埋藏性视乳头玻璃疣误诊为视乳头血管炎一例

视乳头玻璃疣是视乳头发育异常的表现之一,可能引起视乳头周围视网膜下出血,埋藏性视乳头玻璃疣表现与视乳头水肿相似,应注意鉴别。SD-OCT可有助于明确埋藏性视乳头玻璃疣的诊断。
胭动脉陷迫综合征12例临床特点分析

胭动脉陷迫综合征(PAES)是由于胭窝处的解剖学异常致使胭动脉受压导致相应的下肢缺血症状的疾病。腓肠肌内侧头随着胚胎发育过程而逐渐在腘窝中移位,同时胭窝中的动脉结构重新排列,在此过程中出现的腘动脉与周围肌肉或肌腱解剖学关系的异常则会导致PAES的发生。PAES的发病率约为0.2% -3.5%,患者一般为青年男性,年龄< 50岁的小腿跛行的患者50%是由本病引起的。
Neuroimaging Features of Pituicytomas

Pituicytoma is a distinct low-grade glioma arising from pituicytes of the neurohypophysis and infundibulum. Due to the rarity of this tumor, most of the reported cases in the literature were originally misdiagnosed as pituitary adenoma, meningiomas, and craniopharyngioma. It is of vital importance to accurately identify this tumor because this tumor, unlike pituitary adenomas, is prone to heavy bleeding during the surgical resection.
Notification Rate of Tuberculosis among Migrants in China 2005-2014: A Systematic Review and Meta-analysis

Background: Migrations have been reported to be associated with the high risk of tuberculosis (TB), but there is no systematic analysis of the available data for TB among migrant in China. The aim of this study was to examine the notification rate of active and sputum smear-positive TB by a systematic review and meta-analysis. Methods: A systematic review and meta-analysis were performed to examine the notification rate of active and sputum smear-positive TB among migrants in China. Two reviewers searched the cross-sectional studies published in PubMed, EMBASE, SciFinder, and Web of Science in English and in CNKI and Wanfang databases in Chinese. Pooled estimates of notification rate of TB among migrants were calculated using a random effects model. Meta-regression analysis and subgroup analysis stratified by year, region were also performed. Results: Seventy eligible studies met the inclusion criteria for the final analysis. The overall notification rate of active TB and sputum smear-positive cases among migrants were 53.12 (95% confidence interval [CI]: 47.32-59.63) and 24.53 (95% CI: 22.01-27.34) per 100,000 populations, respectively. The notification rate of active TB significantly increased from 50.95 (95% C/: 41.11-63.14) per 100,000 populations in 2005 to 84.62 (95% CI: 78.00-91.80) per 100,000 populations in 2014 while that of smear-positive TB was constant during the study time (P = 0.79). The geographic difference was identified both for active and sputum smear-positive TB, with the higher notification rates mainly distributing along the eastern coastal areas. Conclusions: The pooled estimate of active TB and sputum smear-positive TB among migrants was lower than the national notification rate among general population, but the gap between our data and national notification rate among general population is narrowed down during 2005-2014.
Needle Sensation and Personality Factors Influence Therapeutic Effect of Acupuncture for Treating Bell's Palsy: A Secondary Analysis of a Multicenter Randomized Controlled Trial

Background: It has not been solved what kind of needle sensation might influence outcomes of acupuncture treatment. Effects of personality factors on the therapeutic effect of acupuncture have not been investigated. This study aimed to find the effects of the traits of personality on the objective outcome when different acupuncture techniques were used in treating patients with Bell's palsy. Methods: We performed a secondary analysis of a prospective multicenter randomized controlled trial of acupuncture for Bell's palsy. Patients were randomly assigned to the de qi and control groups, respectively. The primary outcome was facial nerve function at month 6. The intensity of each needle sensation was rated by a visual analog scale. Psychosocial factors were assessed by the pretreatment mediator questionnaire; 16 Personality Factor Questionnaire (16PF) was used for assessing personality factors and digit cancellation test for assessing attention. Results: After 6 months, patients in the de qi group had better facial function (adjusted odds ratio [OR]: 4.16,95% confidence interval [CI]: 2.23-7.78). Path analysis showed that intensity of needle sensation of fullness had direct effect on House-Brackmann (HB) score at month 6. In de qi group, the low HB score on day 1 (OR: 0.13,95% CI: 0.03-0.45) and the low Social Boldness score (OR: 0.63,95% CI: 0.41-0.97) in 16PF were associated with better facial function. In control group, low HB score on day 1 (OR: 0.25,95% CI: 0.13-0.50), low Vigilance score (OR: 0.66,95% CI: 0.50-0.88), and high Tension score (OR: 1.41,95% CI: 1.12-1.77) in 16PF were related to better facial function. Conclusions: The needle sensation of fullness could predict better facial function and personality traits might influence outcomes of acupuncture treatment. Both of them should be considered seriously in acupuncture treatment and research.
重症先天性膈疝术后体外膜肺氧合辅助治疗一例

国外有报道,对于那些高死亡风险的膈疝患儿,应用ECMO治疗后生存率会上升,虽然术前病情稳定和及时手术对于无需ECMO的患儿是有益的,但需要ECMO辅助患儿的手术修复时机却是有争议的。目前国内重症CDH的死亡率依然偏高。降低其死亡率依赖包括手术在内的综合处理。ECMO作为最后的治疗措施有助于改善治疗效果,但仍需积累经验。
Dimensional analysis and extended hydrodynamic theory applied to long-rod penetration of ceramics

Principles of dimensional analysis are applied in a new interpretation of penetration of ceramic targets subjected to hypervelocity impact. The analysis results in a power series representation – in terms of inverse velocity – of normalized depth of penetration that reduces to the hydrodynamic solution at high impact velocities. Specifically considered are test data from four literature sources involving penetration of confined thick ceramic targets by tungsten long rod projectiles. The ceramics are AD-995 alumina, aluminum nitride, silicon carbide, and boron carbide. Test data can be accurately represented by the linear form of the power series, whereby the same value of a single fitting parameter applies remarkably well for all four ceramics. Comparison of the present model with others in the literature (e.g., Tate’s theory) demonstrates a target resistance stress that depends on impact velocity, linearly in the limiting case. Comparison of the present analysis with recent research involving penetration of thin ceramic tiles at lower typical impact velocities confirms the importance of target properties related to fracture and shear strength at the Hugoniot Elastic Limit (HEL) only in the latter. In contrast, in the former (i.e., hypervelocity and thick target) experiments, the current analysis demonstrates dominant dependence of penetration depth only by target mass density. Such comparisons suggest transitions from microstructure-controlled to density-controlled penetration resistance with increasing impact velocity and ceramic target thickness.
Nodeless pairing in superconducting copper-oxide monolayer films on Bi_2Sr_2CaCu_2O_(8+δ)

The pairing mechanism of high-temperature superconductivity in cuprates remains the biggest unresolved mystery in condensed matter physics. To solve the problem, one of the most effective approaches is to investigate directly the superconducting CuO_2 layers. Here, by growing CuO_2 monolayer films on Bi_2Sr_2CaCu_2O_(8+δ) substrates, we identify two distinct and spatially separated energy gaps centered at the Fermi energy, a smaller U-like gap and a larger V-like gap on the films, and study their interactions with alien atoms by low-temperature scanning tunneling microscopy. The newly discovered U-like gap exhibits strong phase coherence and is immune to scattering by K, Cs and Ag atoms, suggesting its nature as a nodeless superconducting gap in the CuO_2 layers, whereas the V-like gap agrees with the well-known pseudogap state in the underdoped regime. Our results support an s-wave superconductivity in Bi_2Sr_2CaCu_2O_(8+δ), which, we propose, originates from the modulation-doping resultant twodimensional hole liquid confined in the CuO_2 layers.