The Study of High Plot Ratio Residential Model under Urban Dense Population

我国是一个人口众多的国家，随着我国城市化进程的加快、市场经济的快速发展和人们生活水平的提高，城市居住用地需求持续增加。人多地少是我国的基本国情，我们应在充分尊重这一现实的基础上，借鉴国外城市尤其是亚洲国家和地区城市居住建筑发展理论与实践成果，把城市人口密集下的高容积率居住模式作为节约有限的国土资源，实现我国可持续发展的一个重要课题加以研究。本文首先以城市人口密集为背景，分析了国外城市化过程中的居住沿革和亚洲主要城市的居住策略，以及我国历史上城市人口密集下的居住状况。并结合当前社会发展的现状，指出目前我国采取高容积率居住模式作为城市住区发展的策略之一，既十分必要和紧迫，又具有良好的社会基础和可行...China is a populous country. The demand of residential estate of the city is increasing continuously with the quickening of the process of urbanization, fast development of market economy and improvement of people's living standard. It is fundamental realities of our country to have a large population and a few land. We should take high plot ratio residential model under urban dense population as ...学位：工学硕士院系专业：建筑学系_建筑设计及其理论学号：20023500

高含气井下气液混合输送技术研究

为了确保油田开采过程中电潜泵在高含气油井的正常运行,结合气液分离技术和引射技术,该文运用CFD模拟软件FLUENT研究了一种高含气井下气液混合输送技术.该技术通过建立气体及液体分采通道,利用引射原理将增压后的高压动力液携带富气流举升至地面,以实现利用生产井自身流体实现自我举升.研究表明:经过对比分析发现,对于不同入口气体含量的工况,由于射流泵引射装置的引射比影响,入口气体体积含量40%是一拐点,当入口气体含量超过40%时,引管内的气相含量以及流速基本达到一定值;对于不同入口流量,随着流量的增加,气液分离效果亦逐渐变佳,取气管内的气相含量基本稳定在一定的范围,而取气管内的流速则随着流量的增加而增大.该研究结果对提高电潜泵在油田开采高含气油井中的应用范围具有重要意义

对河北省城镇居民贫困线的测算

贫困线的确定是正确反映一个国家和地区贫困状况的重要问题,因而得到众多学者的关注,提出了许多测算方法。本文利用扩展的线性支出法对河北省城镇居民的贫困线进行实证分析

Accumulation,transformation and depuration of parlytic shellfish toxins by the scallop Patinopecten yessoensis

以我国麻痹性贝毒高发区的虾夷扇贝为研究对象,研究了麻痹性贝毒在扇贝各组织内的累积、转化和排出过程。实验分为洁净海区吊养排毒和室内投喂有毒藻累毒两部分。排毒实验表明,内脏团和鳃排毒率最快,为3.27%/d,外套膜为2.71%/d,证明虾夷扇贝属慢性排毒者。累毒过程中扇贝无不良反应,累毒实验第2 d(A2)扇贝总毒性即达到19.41μgSTXEQ/g(干质量),说明虾夷扇贝对麻痹性毒素敏感性低、累积快、累积量大,不同组织对毒素的累积速率差异不大,在4.80%~4.98%/d之间。内脏团及外套膜始终是毒素最主要的分布组织,占总毒素95%以上,闭壳肌最少。扇贝各组织中毒素组分的复杂性与其毒性正相关,且毒素间有转化现象,内脏团和外套膜是最主要的转化组织。主要转化类型有:gTX1,4被还原成gTX2,3;gTX2,3转化为STX;STX转化为dCSTX以及α、β异构体的相互转化。This study investigated the accumulation,transformation and depuration of paralytic shellfish toxin(PST) in the scallop Patinopecten yessoensi collected from the PST-contaminated area.Two experiments were conducted:in situ depuration of PST in non-PST contaminated sea area and accumulation of PST in laboratory.In the depuration experiment,the visceral mass and gill presented the faster detoxification rate than the mantle,and the average toxin depuration rate reached 3.27% and 2.71% per day,respectively,indicating P.yessoensis was belong to the slow detoxification bivalve.In the accumulation experiment,the total toxicity of the scallop reached 19.41 μg STXeq/g(dry weight)at day two(A2) and no adverse effects were observed during the accumulation experiment,suggesting P.yessoensis has low sensitivity,high tolerance ability to PST with a fast accumulation rate.There was no obvious discrepancy(4.80%~4.98%/day) in accumulation rate between different tissues of P.yessoensis.Toxin content presented the positively correlation ship with the toxin profiles,the visceral mass and mantle contained the higher toxin content and more toxin profiles,while the adductor muscle contained the least.Toxin biotransformation in P.yessoensis was tissues-specific.Transformation in visceral mass and mantle was more significant and the main toxin biotransformation forms occurred as the followings:N-OH toxin GTX1,4 was converted into N-H toxins GTX2,3,GTX2,3 was converted into dcSTX,STX was converted into dcSTX,as well as the reciprocal transformation between isomeric compounds

On Teaching Reform and Practice at Biochemical Engineering Experiments

本文从工科专业实验课教学的重要性入手,阐述了进行生物工程专业实验课教学改革的必要性和重要意义,介绍了生物工程实验教学改革的相关体会。This article,based on the importance of the engineering experiments teaching,expounds the necessity and importance of the reform in Biochemical Engineering Experiments Teaching,and also introduces the experience about Biochemical Engineering Experiments Teaching reform

一种食用油锁养保鲜生产工艺

为了解决食用油在储存过程中因发生各种变化而造成的品质下降问题，介绍了一种食用油的锁养保鲜生产工艺，包括全工段恒温灌装、充氮灌装和抗紫外瓶包装。实践证明，全工段恒温灌装有效避免了灌装油温过高产生负压造成的瓶内缩吸瘪，减少了标签不平整情况的发生；充氮灌装使食用油包装瓶内顶空残氧量低于6％，产品残氧量指标稳定；以色母为抗紫外助剂，制成的食品级食用油包装瓶可防止紫外线对食用油品质的影响。采用此生产工艺，可以有效提高食用油的品质并延长储存期。 In order to solve the problem of degradation of the quality of edible oil due to various changes that occur during the storage process, a fresh-keeping production technology of edible oil was introduced, including constant temperature filling in the whole section, nitrogen filling and UV resistant bottle packaging. The practice showed that the constant temperature filling in the whole section could effectively avoid the bottle shrinkage caused by the high filling oil temperature and negative pressure, and reduce the occurrence of uneven labels. Nitrogen filling could make the residual oxygen content in the processed edible oil bottle less than 6%, and the product residual oxygen index stable. The food grade edible oil packaging bottle made of color masterbatch as an anti-ultraviolet additive could prevent the influence of ultraviolet rays on the quality of edible oil. The use of this production process can effectively improve the quality of edible oil and extend the storage period

特质焦虑人群应激条件下ERP中P3的变化

探讨不同特质焦虑大学生应激条件下的 ERP 特点。方法：以大学英语四级考试为应激源，应用特质- 状态焦虑量表在 200 名考生中， 筛选高特质焦虑和低特质焦虑各 15 人， 使用 NeuroScan 32 Channel ERP System观察应激期和应激后 P3 变化。结果：①低特质焦虑组应激后 P3 波幅大于应激期 （P<0.05） ,潜伏期小于应激期。 ②高特质焦虑组应激期和应激后相比， P3 波幅、 潜伏期无变化。 ③应激时， 高、 低特质焦虑组 P3 波幅、 潜伏期无明显差异。④应激后， 低特质焦虑组 P3 波幅大于高特质焦虑组、 潜伏期小于高特质焦虑组 （P<0.05） 。结论：高、 低特质人群的 P3 差异提示不同人格特质群体在相同应激事件中， 认知功能有差

The Seismic Detecting Technique on Gas Hydrates Based on Wave Impedance Inversion

天然气水合物作为特殊的地质体,可以有效地粘结碎屑颗粒,降低沉积物孔隙度,它的存在改变了地层沉积物的物理性质,造成天然气水合物与围岩速度反差较大,从而与围岩之间存在明显的波阻抗差。为了对地层中是否有天然气水合物赋存进行地震检测,对南海北部神狐海域的天然气水合物赋存区域的地震资料进行波阻抗反演分析,结果显示波阻抗反演方法能够作为探测天然气水合物的一种技术手段,研究区天然气水合物矿体的波阻抗呈高值分布特征,波阻抗值约为3 850--3 960 g/CM3.M/S。综合分析认为,波阻抗反演方法能够用于天然气水合物的地震探测、储层分析和综合研究工作中,反演结果可以为天然气水合物储量计算提供比较准确的矿体面积和厚度参数。As specific geologic body,gas hydrate can cement effectively clastic particles and reduce porosity of deposition,so its presence changes physical property of the sedimentary strata and results in the difference of seismic-wave velocity between gas hydrate and the surrounding rock,and there exists obviously wave impedance difference.In order to detect the presence of sediments with gas hydrate,seismic data of gas hydrate zone in the Shenhu area of the northern South China Sea were used in the wave impedance inversion through practice,testing and summary.Wave impedance inversion method is considered as a kind of good seismic detection technique for identification of gas hydrates,meanwhile,the wave impedance of gas hydrate zone shows high value in the study area,and the wave impedance value is about 3,850-3,960 g/cm3·m/s.All the results suggested that wave impedance inversion can be used for detection,reservoir analysis and comprehensive research of gas hydrates.The wave impedance inversion results can provide comparatively accurate area and thickness parameters of gas hydrate zone for reserves calculation.国家高技术研究发展计划项目(2006AA09A202);国土资源部公益性行业科研专项项目(200811014);国土资源部海洋油气资源与环境地质重点实验室资助项目(MRE200911);国家重点基础研究发展计划项目(2009CB219502

对立定跳远训练方法的研究

本文通过对大、中、小学5个年龄段男女近450名学生的13个运动项目成绩和立定跳远成绩进行测试,找出与立定跳远成绩相关性较大运动项目,从而制定较科学的训练方法,提高学生的立定跳远成绩

中药多组分缓释制剂体外释放评价体系的研究进展

目的：为找到更适合中药多组分的评价方法提供思路。方法：以＂中药多组分＂＂体外释放＂＂同步释药＂＂多指标＂＂Synchronized＂＂Release in vitro＂＂TCM multicomponent＂＂Multi-index＂等为关键词,组合查询2004年1月-2016年6月在PubMed、Elsevier、Springer Link、中国知网、万方、维普等数据库中的相关文献,对中药已知成分作为评价指标、中药指纹图谱在药物体外释放中的应用,以及中药化合物组、吸波面积法、质量权重系数法等方法在中药多组分缓释制剂体外释放中的应用进行综述。结果与结论：共检索到相关文献210篇,其中有效文献42篇。对于成分复杂的中药制剂,溶出度的测定选择其中某种已知的指标成分进行;选择中药组分制剂中的一种或几种药效成分的释放度作为评价指标,可反映中药组分制剂中特定成分的释放特征;以指纹图谱相关峰为指标,可更全面地评价中药多组分缓释制剂的体外释放行为;选择中药多组分制剂中的几种有效成分并结合中药制剂的指纹图谱进行评价中药多组分制剂的释药行为,既可反映多个成分的含量变化,又可反映中药复方整体的含量变化;基于中药化合物组的整体谱特征,采用卡尔曼滤波法,计算获得溶出介质中化合物的含量,能很好地反映中药多组分的释药行为;吸波面积法能考察中药所有成分的释放情况,对复方药物溶出度及体内药动学的研究有指导意义;质量权重法可为中药组分的整体性研究提供参考,但必须明确各成分在整体组分中所占的质量权重系数才能整合反映整体性质。福建省自然科学基金资助项目（No.2015J01491