摘要：The recen tly cons true ted cryogenic cylindrical ion trap velocity map imaging spectrometer(CIT-VMI)has been upgraded for coincidence imaging of both ionic and neutral photofragments from photodissociation of ionic *** prepared ions are cooled down in a homemade cryogenic cylindrical ion trap and then extracted for photodissociation *** th the newly designed elec trie fields for extraction and acceleration,the ion beam can be accelerated to more than 4500 eV,which is necessary for velocity imaging of the neutral photofragments by using the position-sensitive imaging detect *** setup has been tested by the 355 nm pho todissocia tion dynamics of the argon dimer cat ion(Ar2+).From the recorded experimen tal images of both neu tral Ar and ionic Ar+fragments,we interpret velocity resolutions of△v/vu4.6%for neutral fragments,and△v/vul.5%for ionic fragments,respectively.

摘要：表面增强拉曼光谱(SERS)因其独有的快速检测、高灵敏度、低检测限和无损分析等优点,在医学检验领域有着广泛的研究。SERS增强基底的成功构建是SERS技术实现以上优点的前提。本文介绍了SERS的增强机制,在血液检测中,对其增强基底的设计进行了分类及讨论,将其分为无标签基底和有标签基底两大类,并根据材料应用的不同和基底设计的方式不同进行进一步的细分。对近年来血液检测中SERS检测应用相关文献进行了回顾,综述了在血液检验中不同类型增强基底的设计方法及应用特征。最后,对SERS增强基底在血液检验中的设计进行了总结与展望。

摘要：基于“人才争夺战”的背景和区域人才政策的视角,利用自然语言分析(NLP)、文本挖掘等方法整理出2002-2021年中国3308项地方性人才政策的量化数据,设计得到“多地区-多政策”维度下的人才政策量化标准、流程与评价体系,在此基础上结合个体微观数据,考察了城市人才政策对人才流动决策的影响。研究发现:(1)城市人才政策综合得分的提高能够显著增加该城市被人才选择的概率。从城市视角来看,较小规模城市、非省会城市人才政策的作用更为明显。从个体特征来看,高学历、高收入以及25-54岁中、青年人才群体对人才政策综合得分的变动更为敏感。(2)具体到引育留用四类政策环节上,不同地理区域城市所出台的人才政策在各政策环节的实际效果上存在显著差异。东部沿海城市、南方城市的引才、留才和用才环节政策均能显著影响人才流入,而内陆地区育才、用才环节政策作用不明显,北方地区仅留才环节政策能够产生效果。(3)具体到奖励型、保障型、发展型三类政策工具上,不同年龄阶段、不同类型人才群体对各类政策工具的偏好也有所不同。就年龄而言,35岁以下人才群体对生活补贴、薪酬待遇等短期性、补贴型的内容变动较为敏感,而35岁及以上人才群体则相对更关心子女入学与个人职业发展等保障型与发展型政策。就不同类型人才而言,创新创业人才对金融支持、创新载体建设等发展型政策的变化十分关注,而企业经管人才更关心生活补贴与个人所得税税收优惠等奖励型政策。农村实用人才则更看重保障型政策,如户籍政策等。

摘要：AIM:To evaluate the application of anterior segmentoptical coherence tomography(AS-OCT)in posterior capsule opacification(PCO)severity assessment and analyse the relationship between PCO severity and intraocular lens(IOL)***:PCO patients were prospectively ***-sectional images of the anterior segment at horizontal and vertical meridians were acquired with *** area of the IOL-PC(posterior capsular)space and PCO severity(area,thickness,and density at 3 mm and 5 mm IOL optic regions)were *** relationship between PCO severity and visual acuity,comparisons of PCO severity and IOL-PC space using varied IOL designs were ***:One hundred PCO eyes were ***-PC space,PCO thickness and area were positively correlated with axial *** addition,PCO area and thickness were positively correlated with visual acuity when it was≤0.52 log *** cut-off level of visual acuity should be 0.52 log *** varied IOL designs,3-piece C haptic IOL showed a smaller PCO area and thickness than the 1-piece 3 haptic IOL and 1-piece 4 haptic *** area and thickness values for an IOL with a diameter≤11.0 mm was greater than for an IOL with a diameter of 12.5 mm,and the differences were statistically *** area and thickness increased when IOL haptic angulation increased(from 0 to 12 degrees).CONCLUSION:In PCO eyes,cut-off level of visual acuity is 0.52 log *** more severe PCO,visual acuity maybenot enough to describe the visual function *** severity and IOL-PC space are significantly correlated with axial length and IOL design and material.

摘要：Pit limit design has,up to date,focused mainly on maximization of economic profit alone,with environmental and social issues largely *** paper focuses on incorporating both environmental and social issues in the pit limit design process and provides an approach to pit limit optimization that is in compliance with sustainable *** case study demonstrates that ecological costs have a substantial down-sizing effect and social benefits have a substantial up-sizing effect on the optimal pit *** the ecological costs are factored in,the optimal pit limit is 37.5%smaller than the economically optimal pit ***,when the social benefits are factored in,the optimal pit limit is 48.3%larger than the economically optimal *** overall optimal pit limit,with the economic profit,ecological costs and social benefits simultaneously considered,is a result of balancing conflicting goals of maximizing economic profit,minimizing ecological cost,and maximizing social benefit.

摘要：【目的】疾病防控是濒危物种保护管理不可缺少的一个方面,为更深入了解我国一级保护动物川陕哲罗鲑的免疫系统特征,对炎症通路的关键分化因子MyD88(髓样分化因子88)在川陕哲罗鲑中的潜在免疫功能进行研究。【方法】利用川陕哲罗鲑全长转录组数据库获得MyD88基因的cDNA序列,分析其氨基酸结构及进化关系,同时分析其在健康川陕哲罗鲑各组织及LPS和poly(I:C)刺激下的表达模式。【结果】川陕哲罗鲑MyD88具有典型的死亡结构域和TIR结构域。氨基酸序列比较表明,川陕哲罗鲑MyD88与其他脊椎动物具有较高的同源性,其中与鲑科鱼类的同源性最高。系统发育分析表明,川陕哲罗鲑MyD88与鲑科鱼类聚为一支;此外,它们与其他鱼类的同源基因聚在一起,而哺乳动物的MyD88聚集在一个单独的分支上。组织分布分析显示,MyD88在所有组织中广泛表达,其中在头肾、中肾、脾脏和鳃中均高表达。LPS和poly(I:C)刺激后,头肾和脾脏中MyD88的表达显著上调。【结论】研究揭示了MyD88基因在川陕哲罗鲑免疫应答中的潜在作用,为今后川陕哲罗鲑的疾病防治提供理论依据。

摘要：A new evanescently coupled uni-traveling carrier photodiode （EC-UTC-PD） is designed, fabricated and characterized, which incorporates a multimode diluted waveguide structure and UTC active waveguide structure together. A high responsivity of 0.68 A/W at 1.55-μm without an anti-reflection coating, a linear photocurrent responsivity of more than 21 mA, and a large -1 dB vertical alignment tolerance of 2.5 μm are achieved.

摘要：针对目前康复辅具广泛采用标准化设计,提出针对个体差异性的人性化设计方法。以护理床为例,利用西门子人机工程仿真软件JACK研究护理床人机交互中不同身高和体质量的患者在平躺、起背、屈腿等不同功能模式下与护理床的匹配度,根据分析结果得出针对个体差异性的通用型护理床整体及各部分的尺寸及新的护理床护栏设计方案,为相关产品的设计提供参考。

摘要：Along with the explosive growth in the market of new energy electric vehicles,the demand for Li-ion batteries(LIBs)has correspondingly *** the limited life of LIBs,numbers of spent LIBs are bound to be *** of the severe threats and challenges of spent LIBs to the environment,resources,and global sustainable development,the recycling and reuse of spent LIBs have become ***,we propose a novel green and efficient direct recycling method,which realizes the concurrent reuse of LiFePO_(4)(LFP)cathode and graphite anode from spent LFP *** optimizing the proportion of LFP and graphite,a hybrid LFP/graphite(LFPG)cathode was designed for a new type of dualion battery(DIB)that can achieve co-participation in the storage of both anions and *** hybrid LFPG cathode combines the excellent stability of LFP and the high conductivity of graphite to exhibit an extraordinary electrochemical *** best compound,i.e.,LFP:graphite=3:1,with the highest reversible capacity(~130 mAhg^(-1) at 25 mAg^(-1)),high voltage platform of 4.95 V,and outstanding cycle performance,was *** specific diffusion behavior of Li^(+) and PF_(6)^(-) in the hybrid cathode was studied using electrode kinetic tests,further clarifying the working mechanism of *** study provides a new strategy toward the large-scale recycling of positive and negative electrodes of spent LIBs and establishes a precedent for designing new hybrid cathode materials for DIBs with superior performance using spent LIBs.

摘要：为了改善高负荷串列叶栅的设计质量,基于改进粒子群算法、Kriging模型的改进并行多点采样策略、物理规划方法三个模块,建立了一套多目标优化设计系统,该系统可以快速实现串列叶栅设计攻角和非设计攻角的多目标优化设计。为了减少多目标优化的计算量,该优化设计系统采用了物理规划方法将多目标优化设计问题转化为考虑设计者经验的单目标优化问题,并基于Kriging模型的改进并行多点采样准则实现了在一次迭代过程并行评价多个样本点的并行优化方法。应用该系统实现了一高负荷串列叶栅的多目标优化,优化后的串列叶栅在全攻角下的总压损失系数减小,静压升增加,在进口马赫数0.7的条件下,在攻角分别为-6°和3°时,总压损失分别降低21%和35%,证明了本文设计的多目标优化系统具有很好的实际应用价值。基于优化设计结果,分析了串列叶栅的5个造型参数:弯角比(TR)、弦长比(CR)、后排近似攻角(KBB)、轴向重叠度(AO)和节距比例(PP)对串列叶栅设计攻角和非设计攻角性能的影响,研究发现大的PP (约为0.9)和负的KBB (约为-6°)有助于串列叶栅实现较优的设计攻角性能,减小串列叶栅前排叶型的负荷,可以改善串列叶栅非设计攻角的性能和扩宽叶栅的稳定工作范围。