初诊为抑郁症的老年隐球菌性脑膜炎6例报告

目的:探讨老年隐球菌性脑膜炎发病特点和误诊原因。方法:分析6例初诊为抑郁症的老年隐球菌性脑膜炎患者的临床表现、脑脊液特点、治疗和预后表现,以明确发病特点和误诊原因。结果:6例病例初期均表现为头晕、失眠、食纳减少;后期出现颅内感染相对特异症状:认知障碍5例、头痛3例、肢体无力3例、发热2例。脑脊液隐球菌培养阳性明确诊断,抗真菌治疗有效。6例均好转,但是2例患者遗留明显后遗症:1例患者遗留明显的认知障碍和双下肢活动受限,1例双眼失明,2例确诊时间为2、4周。结论:老年患者患病后临床症状常不典型,当一种疾病不能解释所有症状时,需开拓思路,积极完善相关检查,必要时请相关科室协助诊治,尽量减少误诊。福建省厦门市科技局资助项目(项目编号：3502Z20084019

阜新地区一次大雾天气过程的分析

大雾为阜新地区在秋冬季节主要的灾害性天气,对交通、环境有着较大的影响,10月为阜新地区大雾多发季节。本文利用MICAPAS常规资料、自动站数据等资料分析了2019年22-24日阜新地区连续性大雾天气过程。结果表明：(1)此次大雾过程发生在500hpa较平直的纬向环流中,地面为弱高压控制,中低空偏南暖湿气流向阜新地区输送,为大雾的发展提供了有利的环流背景(2)大雾发生的过程中,地面为弱南风,微风使逆温层有一定厚度,有利于大雾的维持(3)低空逆温层使水汽不易扩散,近地面潮湿,对大雾的形成和维持有重要的贡献。(4)大雾发生时大气层结稳定,低层为弱的辐合上升,高层为弱的幅散下沉,有利于大雾的维持发展。</jats:p

输水前后塔里木河下游物种多样性与水因子的关系/Analysis of the relationship between species diversity and hydrologic factors during an interval of intermittent water delivery at the Lower Reaches of Tarim River, China[J]

为检验连续7a的输水对塔里木河下游生态系统稳定性的影响,根据2006年与2010年塔里木河下游地下水埋深、地下水质以及植被调查资料,分析了2006到2010年间物种多样性、地下水位和水质变化状况,利用非参数相关和RDA排序对输水间歇物种多样性与地下水位、水质关系变化作了探讨,结果发现:塔里木河下游输水停止后地下水位不断下降,地下水矿化度也有小幅度增加；物种多样性Shannon-Weiner指数、Simpson指数、Margalef指数、Patrick指数以及Cody指数都以下降为主,表明塔里木河下游受损生态系统尚不具备自维持能力；物种多样性与地下水埋深和地下水矿化度的关系为,地下水平均埋深为5 m左右时,物种多样性主要受地下水质状况的影响,而当地下水平均埋深大于6.5m时,物种多样性的制约因子则为地下水位.因此,从物种多样性角度看,塔里木河下游的合理水位应在5 m左右,大于6.5m则是物种多样性的胁迫水位

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors