Research on the volatility and interdependency of the China mainland stock market and the Hongkong stock market

证券市场自产生以来就以其价格的波动性为显著特征，如何准确描述证券市场价格的行为，以确定未来市场收益率的情况是所有投资者及证券市场各利益相关个体所关心的问题。由于波动率在投资分析、期权定价等方面的重要性，对波动性的定量建模分析就成为对金融资产波动性研究的核心内容之一，并且这也同时成为学术界所关心的问题。在当今社会中，随着金融全球化和各国证券市场的开放，不同证券市场之间的相关性日益突出，而对于不同证券市场间的相互影响是如何作用的以及不同证券市场相互之间的影响程度又如何等这些问题，由于不同研究者所选取的数据、分析方法和运用模型不同，学术界尚未形成统一的结论。 本文主要研究大陆股市与香港股市的波东性...The price volatility is the significant feature of securities market since it the market emerge, how to describe the behavior of the stock market's price accurately so as to determine the future market rate of return is the interests of all investors and related individual of the securities market. Because of the importance of volatility in the investment analysis and option pricing, therefore, qu...学位：经济学硕士院系专业：经济学院_统计学学号：1542010115188

儿童肝糖原贮积病血糖及生化指标的横断面调查

目的肝糖原贮积病（GSD）患者有反复的低血糖发作。本研究的目的是调查分析儿童肝糖原贮积病（GSD）日常血糖及生化指标，为预防低血糖发作和临床管理提供数据支持。方法横断面现场调查研究，收集2024年7月14日在广东省人民医院儿科进行医患交流义诊活动的肝GSD患者及家长的临床资料，现场采集患者及家庭对照者的外周血，检测和分析两组间血糖及生化指标的差异。结果44例肝GSD患者中男34例，女10例。亚型包括GSD Ib型14例、Ia型15例，Ⅲ型2例，Ⅵ型7例，Ⅸ型6例。年龄为7.60（5.08~11.98）岁，所有患者均依赖生玉米淀粉维持血糖。肝GSD患者中平素肝大和反复低血糖发作的患病率分别为77.3%（34/44）和61.4%（27/44）。此次检测有61.4%（27/44）的患者血糖 ≤ 3.9 mmol/L，其中18.2%（8/44）的患者血糖 ≤ 2.8 mmol/L，且均为非Ib型患者，血糖最低值为1.19 mmol/L，医患交流活动期间所有患者均未出现低血糖的症状发作。65.9%（29/44）的家庭受检者的血糖 ≤ 3.9 mmol/L，与肝GSD组比较，低血糖的患病率差异无统计学意义（P =0.658）。生化检测中，肝GSD患者高乳酸血症、高尿酸血症和高胆固醇血症的患病率分别为65.9%、45.5%和9.1%，而家庭对照受检者分别为18.2%，43.2%，15.9%，两组的高尿酸血症和高胆固醇血症患病率差异无统计学意义（P=0.830， P=0.334）。结论肝GSD患者的无症状性低血糖较为普遍，特别是非Ib型患者，需要优化生玉米淀粉的饮食管理，进行动态血糖监测，并注意家庭清淡饮食，降低高尿酸血症和高胆固醇血症发生，避免严重低血糖状态带来的严重不良反应风险、降低并发症

多举措强化驼峰测重设备管理

驼峰测重机是铁路工作中测定溜放车辆等级的重要设备，也是实现铁路溜放自动化和半自动化，提升工作效率的关键设备。而论文以 T·ZY 型驼峰测重机为例，对其常见的故障进行了分析，并制定了检修方案和在室内外的维护方案。</jats:p

Activities of Drifting Sand at the Southern Margin of Gurbantunggut Desert in Holocene

十分特殊的自然地理环境使古尔班通古特沙漠在古全球变化过程中呈现为从流动到固定或由固定到半流动的动态变化性质，对全球变化的响应具有一定的敏感性。沙漠南缘受河流尾阁湿地和绿洲的作用，成为风沙作用和流水作用的交错地带，沉积中普遍记录了这两种作用过程，特别是风沙沉积层特征无论是在野外剖面上或是在沉积分析结果上都具有可识别性。在该地区，利用激光粒度分析仪对沉积物机械组成进行分析，风沙沉积物成为一种相对较为容易识别的物源成分，从而在沉积剖面上使风沙沉积物的相对数量变化在更多的层位上显现出来。因此，本文从沉积学角度研究古尔班通古特沙漠在全新世的历史活动及其对古全球变化的响应。近两年的野外调查观测和室内实验分析，系统地研究了沿沙漠南缘选取的5个典型沉积剖面，分别用Malvem2000激光粒度仪分析各剖面样品的沉积物机械组成特征和用马福炉高温灼烧方法获取化学成分特征（总有机质和碳酸盐），获得大量实地资料和实验数据。通过对区域环境的综合分析和对实验结果的充分讨论对比，识别风沙物源及其在各剖面上的变化，建立地区范围内沉积序列，由此获得以下认识：（1）在本次研究的沙漠南缘地区，风沙物源具有可识别性。在各剖面的野外观察中，普遍存在呈黄色或土黄色的风成砂；在激光粒度测试中，风沙物源的机械组成以典型的正态尖峰为特征；在化学成分特征中，风沙物源的总有机质和碳酸盐的比重有所降低。（2）根据各剖面的风沙物源变化，构建了地区范围的沉积序列，反映出沙漠南缘地区全新世以来主要有八次风沙活动时期。（3）由于该研究区特殊的自然地理环境，风沙活动对全球变化的响应具有一定的敏感性。110000B．P．左右的风沙活动在新仙女木事件结束后，可能受其影响；900。。B．P．左右的风沙活动处于一次降温期，这一降温在很多地区都有显示，属普遍降温阶段；8000一5000aB．P．期间融新世大暖，气候适宜，普遍升温，在各剖面中都未显示出风沙活动迹象'50000aB.P以后，处在大暖期升温后的降温阶段，自5000-2000aB.P．期间显示有多次风沙活动，可能是受降温的影响；1000B．P.左右的风沙活，在中国东部文献中有普遍降温的记载，为一冷期；在500aB.P左右也有风沙活动迹象，这可能与小冰期的降温有关。In a special condition of physical geography, Gurbantunggut desert took on a dynamic change from fixation to half ambulation or from ambulation to fixation, and had a sensitivity to global climate change. At impact upon swamps of terminal river and oasis, southern margin of the desert was a transitional zone between process of drifting sand and process of glide so that it had a record of the two processes in sediment. And this kind of sandy sediment could be identified from either field sections or grains size distribution. Using laser apparatus to analyze mechanical composition of sedimentary matter, the sediment of drifting sand is easier to identify than other components. Hence, we study the response of Gurbantunggut deser to global change in the point of sedimentology. In a hard work of collections on field and experiments in lab, we got abundant this area information and data. By the numbers studying on five typical sedimentary profiles, we had understands from the characters of sedimentary mechanical composition (which from the data of laser apparatus) and the characters of chemic change (which from the data of muffle furnace), and founded the sedimentary serial in this area. And then, we got some conclusions: (l)In southern margin of the desert, sandy origin could be identified. Form the field sections, it presented yellow or khaki drifting sand; from the tests by laser apparatus, the grains size distribution of drifting sand had a special type of normality acute kurtosis; from the chemic change, the proportion of TOC and carbonate also reduced. (2)Based on the activities about drifting sand of five sections, we built a sedimental serial at southern margin of the desert. And it reflected there had eight activities of drifting sand at southern margin of the desert in Holocene. (3)For the special condition of physical geography, the activities of drifting sand had sensitive to global climate change. Based on others studies, we thought that the period about 11000a B.R of activities of drifting sand mainly might have a response to Younger Dryas; about 9000 a B.R,the activity might had a relation on a period of cold; the period of 8000~5000 a B.R belonged to Holocene Megathermal age so that there had few activities; after 5000 a B.R,which in a period of cold since Holocene Megathermal age, it had several activities which might be effected by cool; the activity at 1000 a BJR just was on a period of cold which had more recordation on literatures of China East; in 500 a B.R, there also had activities which might have a relation with little ice age

Time-resolved spectroscopic studies of meta methyl activation reaction of selected benzophenone and anthraquinone derivatives

Femtosecond time-resolved transient absorption (fs-TA), nanosecond time-resolved transient absorption (ns-TA), and nanosecond time-resolved resonance Raman spectroscopy (ns-TR3) methods were used to study the behaviors of the transient intermediates involved in the photophysical and photochemical processes of 3-methylbenzophenone (3-MeBP), 3-(hydroxymethyl)benzophenone (m-BPOH), and 2-(1-hydroxyethyl) 9,10-anthraquinone (2-HEAQ). A particular focus of this work was to study the unusual meta methyl activation reactions of these compounds in water-containing solutions. Density functional theory (DFT) calculations were conducted to help make assignments of the observed experimental transient species and to better understand the reaction mechanisms. First, the photophysical and photochemical reactions of m-BPOH were investigated in selected solvents. In acetonitrile (MeCN) the formation of the triplet state of m-BPOH, (denoted as (m-BPOH)3 ), was detected via an intersystem crossing (ISC). In 2-propanol (IPA), (m-BPOH)3 abstracted a hydrogen atom from the solvent molecule to form an aryl ketyl radical. In an acidic mixed aqueous solution at pH 2, the photoredox reaction appeared to be the predominant reaction. In a more acidic aqueous solution with [H+] =1.0 M, the photoredox reaction faced some competition from the overall photohydration reaction. Second, the photophysical and photochemical reactions of 2-HEAQ in MeCN, IPA, and neutral, acid and basic aqueous solutions were studied. The ISC process of 2-HEAQ took place in MeCN with generation of the triplet excited state species of 2-HEAQ, (2-HEAQ)3. In IPA solvent, (2-HEAQ)3 underwent a hydrogen abstraction with the solvent. A photoredox reaction takes place via an initial protonation process of the AQ group that is followed by deprotonation of the methylene C-H bond in aqueous solutions within a pH range from 2 to 10. Under a stronger acidic aqueous condition with [H+] =1.0 M, the photohydration reaction becomes the major reaction. In strong basic solutions (pH=12) only ISC was observed to take place. The unusual photoredox reaction takes place via protonation of the carbonyl oxygen first followed by deprotonation of the C-H bond in the side chain for both m-BPOH and 2-HEAQ. The protonation of the excited carbonyl oxygen group has been widely studied. On the other hand, the deprotonation of methylene C-H bond is unusual. Therefore, this photoredox reaction for m-BPOH and 2-HEAQ is termed as a meta methyl activation reaction. Third, the photophysical and photochemical reactions of 3-MeBP were explored and compared to those of 4-methylbenzophenone (4-MeBP). This work found that 3-MeBP and 4-MeBP exhibit similar behaviors with m-BPOH and 2-HEAQ in MeCN and IPA. In MeCN, both 3-MeBP and 4-MeBP undergo an efficient ISC process producing triplet excited state species, (3-MeBP)3 and (4-MeBP)3, respectively. In IPA, the (3-MeBP)3 and (4-MeBP)3 intermediates were quenched by the hydrogen abstraction reaction with the solvent. In acidic aqueous solutions (pH 2), the protonated carbonyl oxygen species (3-MeBPH+)3 and (4-(MeBPH+)3 are directly observed by fs-TA spectra. In the case of 4-MeBP, a photohydration is detected and the m-(4-MeBPH2O)3 and o-(4-MeBPH2O)1 species are observed. In contrast, an unusual meta methyl activation reaction is observed for 3-MeBP. In a stronger acid aqueous solution ([H+] =1.0 M) the meta methyl activation reaction becomes the predominant reaction.published_or_final_versionChemistryDoctoralDoctor of Philosoph

中全新世以来乌鲁木齐东道海子B剖面沉积物源探讨与分析

用激光粒度仪对乌鲁木齐河尾闾的东道海子B剖面样品进行测试,获得机械组成的原始数据。样品粒度分布频率曲线可以分为4种类型。不同类型的曲线反映了不同的碎屑物源组成和不同的沉积环境:在该剖面正态尖峰代表风沙物源,偏态宽峰代表河水物源,正态尖峰和偏态宽峰的叠加代表风沙物源与河水物源的混合,鞍状宽峰可能与深水环境有关。整个剖面反映了从约5000aBP到约200aBP湖面逐步扩大、湖水加深,碎屑物源由以风沙补给为主,逐步转为水源碎屑的趋势。剖面下部的风沙沉积层代表全新世大暖期晚期的暖干环境。约自4500aBP碎屑物源反映湖面开始扩张,4500至3100aBP显示3次快速气候波动,3100aBP之后水深增加,除1980aBP前后显示有短暂的风沙活动之外,主要反映河流碎屑入湖变化情况和湖水水深变化

<bold>X</bold>射线诱导<bold>lncR-TUG1</bold>的表达刺激心肌成纤维细胞初级纤毛的形成

探讨lncR-TUG1的表达和初级纤毛形成对X射线诱导心肌损伤的分子机制。采用8 Gy剂量单次全身照射Wistar大鼠，颈椎脱臼法处死，行HE和Masson染色，双酶消化法和差速贴壁法分离心肌成纤维细胞，转染shRNA靶向沉默X射线组心肌成纤维细胞中lncR-TUG1和IFT88；免疫荧光检测心肌组织和心肌成纤维细胞初级纤毛；qPCR检测lncR-TUG1、IFT88、TGFβ1和Col1α的相对基因表达水平；Western blot检测IFT88、TGFβ1和Col1α的蛋白水平。结果表明，与对照组相比，X射线刺激了大鼠心肌组织中lncR-TUG1的表达和初级纤毛形成，心肌组织炎症浸润和胶原蛋白沉积，上调了心肌成纤维细胞中lncR-TUG1的表达和初级纤毛形成。沉默lncR-TUG1后，心肌成纤维细胞中初级纤毛的形成降低（p&lt;0.01）。沉默IFT88后，心肌成纤维细胞中TGFβ1和Col1α的分泌降低（p&lt;0.05）。X射线刺激心肌成纤维细胞中的lncR-TUG1的表达驱动了初级纤毛的形成，促进了X射线诱导的心肌纤维化

Regional Division of Fruit Trees Reconstruction in Loess Plateau of Northern Shaanxi

根据陕北黄土高原的自然生态环境,果树生产现状和果树分区原则,将该区果树生产划分为北部神府海红果产区,毛乌素沙地酿酒、制汁葡萄产区,横山、白于山山区山杏、山桃产区,延河中下游商品苹果、梨产区,黄河沿岸优质红枣产区,中部、南部多种果树产区,洛川塬优质苹果产区7个区域,提出各区果树发展的主要方向、规模和发展措施