134 research outputs found

    A Study on Tax Planning for Pharmaceutical Industry

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    税收成本是企业经营成本的一个重要组成部分,进行有效的税务筹划可以节约企业的税收成本,对其战略目标的实现能够起到推动作用。不过,当前我国实务界对税务筹划的认识还不太成熟,普遍认为税务筹划的目标就是实现税负最小化;进行税务筹划决策时,目光局限在面临的具体问题上,就税论税,而不是从企业长远发展的角度出发综合考虑筹划方案的设计。在这种观念下实施的税务筹划势必无法摆脱其短视性,涉税风险也较大,不利于企业价值的提高。基于此,本文倡导这样一种筹划观念:税务筹划应该在企业战略管理的指导下进行,以实现权衡利益相关者利益的企业价值最大化作为其目标。 对我国制药行业而言,目前是一个机遇与挑战并存的时代。一方面,得...Tax cost plays an important role in the operating cost of enterprises, and that effective tax planning can help taxpayers to save their tax cost and is helpful to the accomplishment of their strategic goal. However, the understanding about tax planning in China’s practical field is not mature yet: the goal of tax planning is just for the minimization of tax burden; when making tax planning decisio...学位:管理学硕士院系专业:管理学院会计系_会计学学号:2005130111

    Comparative anatomy on leaves of Fissistigma (Annonaceae) from China

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    采用叶片表皮离析法、扫描电镜和石蜡制片法,研究了中国分布的番荔枝科瓜馥木属19种植物叶片的形态结构。结果表明:瓜馥木属叶片形态和结构具有较多的相; 似性,如叶片表皮均具有2-多个细胞的单列丝状毛,表皮细胞内具有一个晶簇,气孔器均为平列型,只分布在叶片的远轴面,远轴面的表皮细胞平周壁形成一个乳; 突,叶片主脉的维管组织除具有正常的维管组织外,还具有一个小的副维管束等,这些特征有助于区分番荔枝科植物的属间关系,支持瓜馥木属是一个很自然的类群; 。但叶片表皮毛的形态及分布,表皮细胞的形状、叶肉中栅栏组织和海绵组织的结构、远轴面的乳突大小以及叶主脉维管组织的细微结构则具有种间差异。尤其有助; 于区分小萼瓜馥木和黑风藤、广西瓜馥木和独山瓜馥木、上思瓜馥木和东方瓜馥木等形态相似、难以区分的植物种类。该研究结果为该属的系统研究和种间正确区分; 提供了重要资料。Leaf morphology and structures of nineteen species of Fissistigma from; China were studied using epidermal maceration,scanning electron; microscope and paraffin section method. The results showed that the; anatomical feathers of Fissistigma revealed a remarkable consistency.; The leaf surface of Fissistigma were covered with bicellulate or; multicellulate uniseriate trichomes. The epidermal cells contained one; clustered crystal. The stomatal apparatus were paracytic with two to; four subsidiary cells and only distributed on abaxial epidermis. The; outer percilinal walls of abaxial epidermal cells were papllate. In the; leaf midrib,there was one additional vascular strand except for normal; vascular tissues. Therefore, these anatomical feathers should be; contributed to differentiate the relationship among genera and support; that Fissistigma is a natural group in Annonaceae. However,the form and; distribution of trichomes,the shape of epidermal cells,the structures of; mesophyll tissues,the sizes of papllate cells and the precise vascular; structures in midrib vary obviously with species. Also,these anatomical; differences between species may be used to distinguish some perplexing; species such as F. minuticalyx and F. polyanthum,F. kwangsiense and F.; cavaleriei,F. tungfangense and F. shangtzeense.国家自然科学基

    Application of Differential Thermal Analysis in Physical Chemistry Experiments

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    介绍两个以差热分析为实验手段的物化实验 ,并讨论它的优点。This article introduced two physical chemistry experiments completed by DTA and discussed the advantages over the normal experimental method.国家理科基地创建名牌课程项目! [高教司 (98) - 1 0 5号

    中国罗汉松属叶角质层微形态结构及其分类意义

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    利用扫描电镜对罗汉松属8种2变种植物叶角质层内外表面进行了细致观察。发现罗汉松属植物叶角质层结构具有许多相似特征,表皮细胞较为规则,长方形或多边形,边缘波状弯曲;气孔器排列成带状,长轴均与叶脉一致,气孔器具较为明显的气孔塞和伏罗林环,气孔器保卫细胞极延伸明显,通常具有2~4个副卫细胞、不具极副卫细胞。但罗汉松属叶角质层结构也具有明显的种间差异,镰叶罗汉松和洛杉矶罗汉松同其它种类差异最大,这两种植物叶两面均具气孔器,角质层内表面垂周壁直,角质层凸缘不明显;贺氏罗汉松最为显著的特征是近轴面和远轴面表皮细胞的垂周壁角质层厚且凸缘均极其发达;小叶罗汉松近轴面表皮细胞排列较为规则,多数为方形,长轴与叶脉垂直,垂周壁之间的角质层突起较为显著,延伸到皮下层;兰屿罗汉松近轴面表皮细胞排列较不规则,多边形,细胞的角端比较钝,没有棱角;大理罗汉松气孔带间隔较小,有时两条气孔带挤在一起,使副卫细胞紧连,近轴面表皮细胞较短,方形或长方形,垂周壁之间的角质层较不发达;海南罗汉松角质层气孔带间隔较宽,气孔器形状为阔椭圆形,近轴面表皮细胞均为细长方形;变种短叶罗汉松和狭叶罗汉松与罗汉松也具有明显差异,短叶罗汉松近轴面表皮细胞排列不规则,垂周壁深波状弯曲,凸缘极为明显,但原种罗汉松近轴面表皮细胞排列较为规则,垂周壁浅波状弯曲,凸缘不明显,而狭叶罗汉松近轴面表皮细胞方形或长方形,比罗汉松的表皮细胞短,垂周壁直或略弯曲,角质层极厚。这些角质层微形态特征差异可以作为罗汉松属内种类分类鉴定的依据。江苏省高校自然科学基础研究项目(06KJD180201)~

    Numerical simulation of immiscible two-phase flow in T-shaped microchannel

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    采用摄动有限体积(PFV)算法和水平集(level set)技术对T形微通道内互不相溶两相流动进行了数值模拟研究。考察了两相界面张力和微通道壁面润湿性对流动的影响,精确地捕捉到了油水两相流动的界面。对一些典型的T形微通道油水两相流动进行了数值计算,模拟结果和实验结果吻合较好。分析总结出了微通道内两相流动过程中的一些基本规律,为微通道内的液液两相流动实验设计和工业应用提供了新的数值预测手段

    黑龙江省扎赉特旗牛羊胰阔盘吸虫病流行病学及病原生物学的研究

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    一、前言 牛羊胰脏吸虫病是我国各农牧区中常见而且危害严重的一种吸虫病,国内此吸虫病的病原主要有胰阔盘吸虫(Eurytrema pancreaticum(Janson)、腔阔盘吸虫(E.coelomaticum(Giard et Billet)及枝睾阔盘吸虫(E.cladorchis Chin,Li et Wei)三种,其中以胰阔盘吸虫的分布区最大。关于本类吸虫的生物学问题近年来经国内外蠕虫学者的探讨而逐渐被了解(唐仲璋,1950;唐仲璋、唐崇惕,1975、1977;Basch,1965;Ksembaeva,1967;1973等)。国内在福建已详细观察了腔阔盘吸虫和枝睾阔盘吸虫生活史全过程,并经试验证实了它们的贝类宿主及不同的昆虫宿主的种类。胰阔盘吸虫的生活史虽亦经阐明,

    应用“血防846”等药物驱除羊只胰阔盘吸虫的试验报告

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    家畜胰阔盘吸虫病广泛流行于世界各地。在我国主要分布于东北、内蒙、西北一带的广大农牧区;南方的福建、江西、浙江、广东、广西、贵州等省、区也有报道。 胰阔盘吸虫不仅寄生于羊、牛、猪、骆驼等家畜,而且也可感染人体,威胁人类健康。胰阔盘吸虫寄生于家畜的胰管中,由于机械性刺激、堵塞,以及代谢产物的作用,营养的夺取,引起胰脏的机能障碍和形态改变,如胰管的高度扩张,管壁增厚,粘膜出血、溃疡、炎性细胞的浸润,整个胰脏结缔组织增生,呈慢性增生性胰腺炎。从而使胰液腺和胰岛素的生成、分泌发生改变,全

    水源因素与戊型肝炎病毒感染的关联性

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    目的通过检测浙江省德清县水系上下游地区农村人群血清戊型肝炎病毒抗体水平,以评价非爆发状态下水源因素与戊型肝炎病毒感染的关联性。方法通过统一的调查表收集1 720人的一般资料及可能危险因素,并采用间接酶联免疫吸附法检测血清抗HEV-IgG抗体。结果总标化抗体阳性率为48.79%。其中,上游地区人群标化抗体阳性率为43.52%,下游标化阳性率为51.26%。将两地人群不同的构成特征调整后,下游抗体阳性率仍显著高于上游。同时发现,男性抗体阳性率高于女性;各年龄组阳性率随年龄升高而增加;家庭养猪、喜食猪肝、主要饲养动物和饮酒皆与戊肝感染有统计学关联。结论浙江农村地区戊型肝炎病毒感染情况与当地水源因素有较为显著的关联;猪可能是戊型肝炎病毒的自然宿主之一

    Trisomy 21-induced Dysregulation of Microglial Homeostasis in Alzheimer’s Brains is Mediated by USP25

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    阿尔茨海默病(Alzheimer’s disease, AD)是一种最为常见的与记忆、认知能力退化相关的渐进性神经退行性疾病。唐氏综合征(Down’s syndrome, DS)是早发型阿尔茨海默病的一个重要风险因素,作为最常见的智力障碍遗传疾病,厦门大学医学院神经科学研究所王鑫教授团队揭示了治疗阿尔茨海默病和唐氏综合征新的治疗靶点,并且在小鼠模型上利用USP25小分子抑制剂成功地改善了阿尔茨海默病小鼠的认知功能,缓解了神经退行性病变的病理进程。该研究工作由王鑫教授指导完成,厦门大学医学院助理教授郑秋阳和博士生李桂林完成主要实验工作,王世华、朱琳、高月、邓青芳、张洪峰、张丽珊、吴美玲、狄安洁参与了部分研究工作。厦门大学医学院许华曦、赵颖俊和孙灏教授在研究过程中给予大力帮助和支持,清华大学董晨教授提供了Usp25基因敲除小鼠,厦门大学附属妇女儿童医院周裕林教授和郑良楷博士帮助收集了脑组织样品。Down syndrome (DS), caused by trisomy of chromosome 21, is the most significant risk factor for early-onset Alzheimer’s disease (AD); however, underlying mechanisms linking DS and AD remain unclear. Here, we show that triplication of homologous chromosome 21 genes aggravates neuroinflammation in combined murine DS-AD models. Overexpression of USP25, a deubiquitinating enzyme encoded by chromosome 21, results in microglial activation and induces synaptic and cognitive deficits, whereas genetic ablation of Usp25 reduces neuroinflammation and rescues synaptic and cognitive function in 5×FAD mice. Mechanistically, USP25 deficiency attenuates microglia-mediated proinflammatory cytokine overproduction and synapse elimination. Inhibition of USP25 reestablishes homeostatic microglial signatures and restores synaptic and cognitive function in 5×FAD mice. In summary, we demonstrate an unprecedented role for trisomy 21 and pathogenic effects associated with microgliosis as a result of the increased USP25 dosage, implicating USP25 as a therapeutic target for neuroinflammation in DS and AD.This work was supported by the National Natural Science Foundation of China (31871077, 81822014, and 81571176 to X.W.; 81701130 to Q.Z.), the National Key R&D Program of China (2016YFC1305900 to X.W.), the Natural Science Foundation of Fujian Province of China (2017J06021 to X.W.), the Fundamental Research Funds for the Chinese Central Universities (20720150061 to X.W.), and the BrightFocus Foundation (A2018214F to Yingjun Zhao). 该研究工作得到国家重点研发计划项目、国家自然科学基金、福建省自然科学基金、厦门大学校长基金的资助和支持

    Study on Post-processing Method for HMM-based Phonetic Segmentation using Adaptive Neuro Fuzzy Inference system

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    Supervisor:Masato AkagiSchool of Information ScienceMaste
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