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Search Results: 1 - 10 of 91796 matches for " 姬国斌 "
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人工湿地处理高速公路服务区污水效能
Ecological treatment process of sewage in expressway service area

,张楠
- , 2018,
Abstract: 以预处理和人工湿地为主体工艺对高速公路服务区污水进行处理,探讨污染物去除效果的影响因素。预处理以膜分离技术与生物处理技术作为主要的处理手段,对污水进行预治理。将对预处理后的出水进一步进行人工湿地处理,达到污水回用标准,并分别测定了预处理和人工湿地对污染物的去除效率。同时探讨了温度、子系统类型、填料高度对生态处理工艺的影响。结果表明:预处理的出水生物需氧量及总氮值去除波动较大,而人工湿地对水化学需氧量(COD)、五日生物需氧量(BOD??5)、氨氮和总氮去除的水平较好。经预处理+人工湿地处理后,服务区污COD、BOD??5、氨氮及总氮的去除率均大于95%,出水水质满足《城市污水再利用[KG*2]景观环境用水》(GB/T 18921―2002)要求,达污水回用标准。而膜阻力测定结果显示,预处理中膜污染主要来源于泥饼层,膜固有阻力对膜污染几乎无影响。高温季节有利于总氮的去除,低温季节会影响化学需氧量的去除;添加大棚人工湿地子系统,由于强化生物膜的作用,生态处理工艺对氨氮和总氮的去除效果得到了提高;填料高度为40 cm时大部分氨氮通过微生物作用被去除。填料高度为20 cm时大部分COD被去除。该结果为今后高速公路服务区污水处理及回用方法研究提供了有益探索 。
Pretreatment and constructed wetland treatments were used as the main processes to treat sewage in the expressway service area. Membrane separation and biological treatment technologies were used for the principal methods of pretreatment of wastewater. After pretreatment, the constructed wetland treats the effluent to attain a certain sewage reuse standard. Removal efficiencies of pollutants in pretreatment and constructed wetland treatment were measured.The effects of temperature, subsystem type, and packing height on ecological treatment were also discussed. The results show that the removal of chemical oxygen demand (COD), 5 days biochemical oxygen demand (BOD??5), ammonia nitrogen, and total nitrogen in the constructed wetland achieve good success. After both pretreatment and constructed wetland treatment, the removal rates in the service area are all greater than 95%, and the effluent water quality meets 《??The reuse of urban recycling water: Water quality standard for scenic environment use??》(GB/T 18921―2002). Membrane pollution in the pretreatment mainly stems from the mud cake layer, while the inherent microbial resistance of the membrane has little effect on the membrane pollution, based on membrane resistance measurements. The high??temperature season is beneficial to the removal of total nitrogen, while the low??temperature season affects the removal of COD. The addition of a constructed wetland subsystem in the greenhouse will improve the removal of ammonia nitrogen and total nitrogen by the ecological treatment process due to strengthening of the biofilm. Most ammonia nitrogen is removed by microbial action at a packing height of 40 cm, while most COD is successfully removed at a packing height of 20 cm. The results of this study are useful for exploration of the methods of wastewater treatment and its reuse in the expressway service area. 4 tabs, 2 figs, 25 refs.?
硅芯片封接用PbO、ZnO、B_2O_3三元系易熔玻璃特性与封接工艺的关系
孙以材,孟凡,,刘盘阁,荣琴
半导体学报 , 2002,
Abstract: 对淬火态及重熔再凝固态两种粉末进行 DSC、红外吸收光谱及 X射线衍射谱分析 ,实验表明 ,淬火态的软化点低 ,在 5 0 0~ 5 10℃下完全熔化 ,有利于芯片的低温封接 .重熔再凝固态的熔点高 ( 63 0℃ )、热稳定性好 ,有利于器件的使用 .进一步研究表明 ,淬火态为无序态 ,再凝固态为结晶态 ,其中存在 Pb2 Zn B2 O6 的晶体相 .无论是在无序态中还是在结晶态中 ,BO3]3- 离子团都不会破裂 ,均出现其分子振动的特征简正模 .
控股股东资产注入行为及其影响因素研究
Research on Majority Shareholders’ Behavior of Assets-Injecting and Its Influencing Factors
 [PDF]

颜淑, 许永
Finance (FIN) , 2011, DOI: 10.12677/fin.2011.13011
Abstract: 本文通过两方面的比较,运用Logistic 回归来研究控股股东在资产注入定向增发事件中的行为选择。在是否注资增发的行为选择中,研究发现市价或基准价格越低于每股内在价值的企业进行定向增发、大股东进行资产注入的可能性越大。其中关联交易程度和股权集中度对该决策具有显著影响,充分说明了控股股东进行注资增发的动因主要在于控制权巩固的激励及减少关联交易做强上市公司的同时获取更多收益。在是否以资产作为对价支付的行为选择中,控股股东确实存在选择偏好。且控股股东持股比例增加率及公司规模对方式选择有显著影响。没有发现控股股东背景对上述决策有显著影响。资产负债率等传统的解释股权再融资的控制变量在这里也缺乏解释力。
This paper uses Logistic regression model to research majority shareholders’ behavior choices in the event of assets-injecting of private placement. It compares in two aspects. In the choice of whether to inject assets or not, this paper discovers that the companies whose market prices or benchmark prices are lower than their intrinsic value are more able to issue stocks to specific objects and their majority shareholders are more able to inject assets. Related transaction level and HERF are the two main factors which influence majority shareholders’ decision-making markedly. That suggests the main aims of majority shareholders’ injecting assets in private placement are solidifying control rights and reducing related transaction in order to improve listed companies and meanwhile wish to gain more profits in the future. In the choice of whether to purchase by assets or cash, this paper discovers that there really exists majority shareholders’ preference. Increment rate of shareholding ratio and size of the company are the two main factors which influence majority shareholders’ decision-making significantly. This paper doesn’t discover that majority shareholders’ background has prominent influence on the decision-making. Also, control variables such as asset-liability ratio which used to explain secondary equity offering traditionally can’t explain here.
中医发展的“走出去”“引进来”策略略论
“Go out” and “bring in” strategies of traditional Chinesemedicine development


- , 2016,
Abstract: 目前,中医的孤立发展模式致使中医发展面临诸多问题。中医要发展和振兴,就需要以“走出去”“引进来”的策略来指导。而要实现中医的“走出去”“引进来”,发挥好中医系统思维在中医与现代科学技术之间的桥梁作用是关键。为此,中医发展既要重视中医人才的“走出去”“引进来”,同时也要从学科发展的角度探讨中医“走出去”“引进来”。
Currently, traditional Chinese medicine (TCM) in an isolated mode of development is faced with manyproblems. Therefore, “go out” and “bring in” strategies are necessary to promote the development of TCM. The key toimplement “go out” and “bring in” is to make full use of the systematic thoughts of TCM as the bridge between TCM andmodern Sci&Tech. Specifically, TCM development should focus on “go out” and “bring in” of TCM talents as well as ofTCM discipline
亚健康状态影响因素的研究进展
Research progress of influence factors for suboptimal health status

陈洁瑜,赵晓山,王嘉莉,,孙晓敏,杨乐,彦兆,罗仁,??
- , 2016,
Abstract: 亚健康状态是处于健康和疾病之间的健康低质量状态,现代社会经济的飞速发展,竞争日趋激烈,人们的生活方式和工作环境发生了很大改变,越来越多的人处于这种状态。目前认为,亚健康状态具有既可回归健康,又可进展为疾病的双向性转化特点,但亚健康的发生及其进展机制尚不清楚。因此,研究亚健康状态相关影响因素,可以识别高危群体或个体,对亚健康的预防、促进健康,预防疾病具有重要的意义。本文就行为和生活方式因素(吸烟、饮酒、营养不良、压力及应激性生活事件、运动锻炼不足或久坐、睡眠问题等)、环境因素(自然地理环境因素、社会环境、家庭环境等)、生物因素(年龄、性别、学历、体重、中医体质)等方面对亚健康状态的影响因素进行综述,以期为进一步研究提供参考。
Pd/CMK-3的合成及其在Suzuki-Miyaura碳-碳偶联反应中的应用
高婷婷,广
化工学报 , 2011,
Abstract: 利用介孔二氧化硅(SBA-15)为模板、蔗糖为碳源,制备了有序介孔碳材料CMK-3,然后以CMK-3为载体,利用浸渍还原法得到介孔碳负载Pd纳米粒子的复合催化剂(Pd/CMK-3),通过XRD、TEM以及氮气吸附-脱附等手段对催化剂的微结构和组分进行分析,结果表明CMK-3为有序介孔结构,孔径约为5nm,Pd/CMK-3保留了介孔结构,且孔道中负载有不同尺寸的Pd粒子。应用于无配体催化的Suzuki-Miyaura服务把本文推荐给朋友SBA-15;有序介孔碳;Pd/CMK-3;Suzuki-Miyaura碳”几篇好文章,特向您推荐。请点击下面的网址:"name="neirong">加入引用管理器E-mailAlertRSS作者相关文章
低分子量结晶性丙交酯/乙交酯与己内酯/乙交酯共聚物热转变温度的组成与分子量依赖性
,吴林波
高分子学报 , 2008, DOI: 10.3724/SP.J.1105.2008.00297
Abstract: 以1,4-丁二醇为引发剂、辛酸亚锡为催化剂,通过L丙交酯(LLA)、乙交酯(GA)、ε-己内酯(CL)的开环共聚,制得了低分子量的端羟基结晶性LLA/GA共聚物(PLLGA)和CL/GA共聚物(PCG),分别以FTIR、1H-NMR、GPC、DSC对其微结构和热转变温度进行了表征,重点考察了其热转变温度的组成、分子量依赖性.结果表明,利用辛酸亚锡/二元醇引发开环聚合,通过改变单体配比和单体/引发剂配比,可方便地调控共聚物的组成和分子量;通过改变共聚物的组成和分子量,可在较宽的范围内调节共聚物的热转变温度,并得到了玻璃化温度和熔点与组成、分子量之间定量的经验关系式.
山羊fshr基因5′端侧翼序列多态性对产羔性状的影响
云涛?,云?
西北农林科技大学学报(自然科学版) , 2007,
Abstract: 为了研究山羊fshr基因对产羔性状的影响,用rflp-pcr法对多胎和单胎布尔山羊、关中奶山羊和萨能奶山羊母羊fshr基因5′端侧翼序列进行了多态性检测。结果发现,fshr基因5′端侧翼序列经pstⅰ、haeⅲ、sinⅰ和taqⅰ酶切,在多胎母羊和单胎母羊群体中均未表现出多态性;不同山羊群体fshr基因5′端侧翼序列中各存在一些碱基的差异,但这些差异均未影响fshr基因的转录和山羊的产羔性状。说明所检测的fshr基因5′端侧翼序列这些酶切位点与山羊的产羔性状之间没有遗传连锁关系。
海森堡群上与薛定谔算子相关的里斯变换的哈代型估计
Hardy Type Estimates for Riesz Transforms Associated with Schr?dinger Operators on the Heisenberg Group
 [PDF]

, 刘宇
Pure Mathematics (PM) , 2015, DOI: 10.12677/PM.2015.56042
Abstract:
令Hn为海森堡群,Q=2n+2为其齐次维数。本文考虑了薛定谔算子-ΔHn+V,其中ΔHn为次拉普拉斯算子,对于q1>Q/2,非负位势V属于逆赫尔德类Bq1。我们将证明算子T=Va(-Δ+V)-a在HL1(Hn)到L1(Hn)上是有界的。
Let Hn be the Heisenberg group and Q=2n+2 be its homogenous dimension. In this paper, we consider the Schr?dinger operator -ΔHn+V, where ΔHn is the sub-Laplacian and the non- ?negative potential V belongs to the reverse H?lder class Bq1 for q1>Q/2. We show that the operator T=Va(-Δ+V)-a is bounded from HL1(Hn) to L1(Hn).
可生物降解多嵌段聚(酯-氨酯)的合成及其热致形状记忆性质
袁征,,吴林波
高分子学报 , 2009, DOI: 10.3724/SP.J.1105.2009.00153
Abstract: 以端羟基L-丙交酯/乙交酯共聚物(PLLG-diol)和端羟基ε-己内酯/乙交酯共聚物(PCG-diol)为硬段和软段,通过与二异氰酸酯反应制得了软、硬分子量和组成均可调的多嵌段聚(酯-氨酯),表征了它们的形状记忆行为.多嵌段聚(酯-氨酯)具有良好的形状记忆性质,应变固定率达98%~99.5%,应变恢复率达93%~98.5%;通过转变温度的调节,可使多嵌段聚(酯-氨酯)在37℃体温下不发生形状变化,而在稍高于体温的温度(40~50℃)下恢复原始形状,其形状恢复速率可通过温度和升温速率来调节.
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