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Search Results: 1 - 10 of 16385 matches for " 戴杭骁 "
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基于外资银行参股的银行安全预警体系研究
志敏,
浙江大学学报(人文社会科学版) , 2009,
Abstract:
Research on the Safety Warning System of Foreign-shared Banks
基于外资银行参股的银行安全预警体系研究

Dai Zhimin,Dai Hangxiao,
志敏
,

浙江大学学报(人文社会科学版) , 2009,
Abstract: 金融安全尤其是银行安全涉及一国经济和社会的稳定.随着外资银行参股国内银行事例的增多,建立有效的银行安全预警体系已刻不容缓.以管理层与股权控制、银行业务控制、银行股权稳定、信贷控制、风险传染、金融监管六大类指标为基础构建的外资参股银行的安全预警指标体系,可以为我国金融监管机构准确评估引进境外金融机构的效应和建立快速有效的金融安全监管体系提供决策参考.
拉锥光纤端面耦合效率的研究
The Coupling Efficiency Study of Tapered Fiber End Faces
 [PDF]

洪媛, 丽杏, 谭启龙, 范稷, 涂兴华
Optoelectronics (OE) , 2014, DOI: 10.12677/OE.2014.44007
Abstract:
光纤端面形状对光纤耦合的相关指标影响较大。光纤传输系统的速率越高,反射光对系统的影响越大。反射光会沿着光纤反馈到系统的激光器光源中,引起系统的不稳定和噪声,使得光纤系统的传输信息不可靠。因此我们提出通过拉锥将光纤端面制成曲面,而锥体曲面与光纤系统匹配,可以与光纤线路进行低损耗连接,具有极低的后向反射,得到更高的回波损耗。基于光纤熔接机的熔接功能,在放电熔融时使夹具反向移动,使光纤在熔融状态下获得径向拉力,可以改变光纤径向尺寸分布,光纤平端面可形成具有一定锥体的曲面。本文测量了不同放电时间和放电强度条件下,相应形成的光纤端面的插入损耗和回波损耗值,并与光纤平端面对比, 得到回波损耗可达到36 dB,并通过测试和分析,我们首次提出插入损耗随耦合端面距离改变的变化规律的结论。
The shape of fiber end has a relatively vital effect on related indices of fiber coupling. The higher the fiber transmission system is, the greater the effect of reflected light is on the system. The reflected light can feed back into the laser source, causing instability and noise of system, which leads to unreliable transmission information. Then we put forward the idea that the end face can be made into curved surface by tapering to match with fiber system and be connected with low loss which has extremely low back reflection and gets higher return loss. On the basis of fusion function of fiber fusion splicer, the fixture moves reversely in the melt when it discharges and the fiber obtains radial tension in the molten state that can change the fiber radial size distribution. Then fiber end face can form a curved surface with a certain cone. In this paper we measure return loss and insert loss of fiber end faces respectively corresponding to different discharge time and intensity. In comparison with fiber flat end, we conclude that return loss of tapered fiber can reach 36 dB and to our knowledge, we first time put forward the rule that insert loss changes when the coupling end distance changes.

高聚物P(EO)n-CuBr2薄膜在流体静高压下离子电导率和介电常数的提高(Ⅱ)——添加增塑剂方法的应用
苏昉,卫平,
高压物理学报 , 2001, DOI: 10.11858/gywlxb.2001.03.001
Abstract: 选用分子量为500万的聚氧化乙烯和无水溴化铜,通过混溶蒸发法制备出一系列高聚物P(EO)n-CuBr2(n=4,8,12,16,24)薄膜,并在0.1~2443MPa范围不同的静水压下详细测量了它们的相对介电常数。分别探讨了增塑剂(C4H6O3)含量对室温常压下离子电导率和介电常数的影响,及其对高压下离子电导率和介电常数的影响。实验结果表明:P(EO)16-CuBr2薄膜在添加介电常数较高和本体粘度较低的增塑剂C4H6O3后,当其相对浓度nPC/ntotal=20%时,不仅使该薄膜的室温常压离子电导率明显提高6.8倍,而且使其在高压力下的离子电导率提高1(0.1~100MPa)至2(350~800MPa)个数量级,非常有利于在高压环境中应用。
高聚物P(EO)n-CuBr2薄膜在流体静高压下离子电导率和介电常数的提高(Ⅰ)——发现三种不同相的压力效应
,卫平,苏昉
高压物理学报 , 2001, DOI: 10.11858/gywlxb.2001.01.003
Abstract: 用混溶蒸发法制备出一系列高聚物P(EO)n-CuBr2(n=4,8,12,16,24)薄膜,并详细测量它们在0.1~350MPa静水压范围内的复阻抗谱、在0.1~2400MPa静水压范围内的交流电导率以及介电常数。结果表明:离子电导率对压力的依赖关系(σ-p曲线)是条折线,可分解为四条直线相迭加。进一步做X射线衍射物相分析,它们分别归于PEO非晶相的压力效应、PEO结晶相的压力效应和析出CuBr2新相的压力效应。由此计算出上述三种不同相所对应的激活体积、截止压力各自随高聚物P(EO)n-CuBr2薄膜组分的变化。为减小离子电导率的压力效应提供了物理基础。
基于波导缝隙天线的TEM室频率扩展方法
Frequency extension method of TEM cells based on slotted waveguide antenna

宋春江,,
- , 2018, DOI: 10.13700/j.bh.1001-5965.2017.0296
Abstract: 摘要 为突破实际测试当中的局限,研究了横电磁波传输(TEM)室频率范围的扩展方法。运用电磁场与微波技术相关原理,通过分析TEM室壳体开缝对高次模的影响,利用壳体表面电流分布变化规律和波导缝隙天线原理重新解释了开缝对高次模的抑制作用,进而提出了一种TEM室壳体表面开缝的设计方法。通过电磁场数值仿真,验证了抑制高次模工程方法的有效性,并对其控制参数和约束条件的准确性进行了分析评估;通过加工实物并进行实测,进一步验证了新方法的效果。仿真与测试结果表明,开缝抑制高次模的工程方法能够在不减小测试空间与影响主模传输的前提下,将测试带宽扩展了42.9%。
Abstract:In order to break through limitatiions in actual testing,the extension method of frequency range of a transverse electromagnetic (TEM) cell is studied. Using the theory of electromagnetic field and microwave technology, the influence of adding slots to the cell on the higher order modes is analyzed, and the suppressing effect of slots on the higher order modes is reinterpreted by summarizing the variation of the distribution of surface current. According to the principle of slotted waveguide antenna, a new method has been proposed to design the slotted surface of the TEM cell. Along with the numerical simulation of electromagnetic field, the paper validates the effectiveness of an engineering method to suppress higher order modes and evaluates the accuracy of the control parameters and the constraint conditions. The effect of the new method is further verified by processing a real cell and its measurement. The simulation and test results show that, without reducing the test space and affecting the main mode, the engineering method of slotted cell can extend the bandwidth by 42.9% by suppressing higher order modes.
VEGF/PDGF相关因子在晚期肾透明细胞癌中的表达与舒尼替尼远期疗效的相关性
李耀辉,冯达天,轶△,,王国民
- , 2016,
Abstract:
大黄及牛黄解毒片大鼠给药后血浆中大黄活性成分的药代动力学比较研究
刘?h昕,,关蓉,太俊,宋敏
- , 2018,
Abstract: 考察大黄及牛黄解毒片给药后大黄活性成分在大鼠体内药代动力学行为的差异。大鼠分别灌胃给予大黄生药材96 mg/kg(含总蒽醌1.83 mg/kg,相当于大黄酸0.28 mg/kg、大黄素0.30 mg/kg、大黄酚0.81 mg/kg、芦荟大黄素0.23 mg/kg及大黄素甲醚0.20 mg/kg)及牛黄解毒片250 mg/kg(含总蒽醌与大黄生药材等量,相当于大黄酸0.33 mg/kg、大黄素0.38 mg/kg、大黄酚0.71 mg/kg、芦荟大黄素0.24 mg/kg及大黄素甲醚0.17 mg/kg),血浆经甲醇沉淀后,采用LC-MS/MS法测定大黄活性成分血药浓度,WinNonlin 7.0软件计算药代动力学参数。大鼠灌胃大黄及牛黄解毒片后,大黄酸的cmax分别为(121±103)及(474±251)μg/L,AUC0-t分别为(275±176)及(406±194)μg?h/L;大黄酚异构体的cmax分别为(2 325±1 390)及(3 580±2 169)μg/L,AUC0-t分别为(8 170±2 661)及(8 856±4 023)μg?h/L;仅在牛黄解毒片给药大鼠血浆中检测出大黄素,且牛黄解毒片给药后大鼠血浆中大黄酸的cmax、AUC及t1/2,大黄酚异构体的Vd及CL与单味大黄相比显著增加,大黄酚异构体的tmax显著下降。实验结果表明,牛黄解毒片复方配伍增强了大黄活性成分在大鼠体内的吸收利用,改变了大黄活性成分的药代动力学行为。
The study aims to investigate different pharmacokinetic profilesof anthraquinones after oral administration of Rhei Radix et Rhizoma and Niuhuang Jiedu Tablets(NHJDT)in rats, respectively. Rats were administrated with 96 mg/kg of Rhei Radix et Rhizoma(1. 83 mg/kg of total anthraquinone, equivalent to 0. 28 mg/kg of rhein, 0. 30 mg/kg of emodin, 0. 81 mg/kg of chrysophanol, 0. 23 mg/kg of aloe-emodin and 0. 20 mg/kg of physcion)or 250 mg/kg of NHJDT(equal dose of total anthraquinone as Rhei Radix et Rhizoma, equivalent to 0. 33 mg/kg of rhein, 0. 38 mg/kg of emodin, 0. 71 mg/kg of chrysophanol, 0. 24 mg/kg of aloe-emodin and 0. 17 mg/kg of physcion), respectively. Followed by protein precipitation with methanol, the anthraquinones in plasma samples were determined by LC-MS/MS. The pharmacokinetic parameters were calculated by WinNonlin 7. 0. The cmaxof rhein were(121±103)and(474±251)μg/L, and the AUC0-twere(275±176)and(406±194)μg ?h/L for Rhei Radix et Rhizoma and NHJDT, respectively. The cmaxof chrysophanol isomer were(2 325±1 390)and(3 580±2 169)μg/L, and the AUC0-twere(8 170±2 661)and(8 856±4 023)μg ?h/L, respectively. Emodin in very low levels was only detected in rat plasma samples after oral gavage of NHJDT. The cmax, AUC and t1/2 of rhein, as well as Vd and CL of chrysophanol isomer were observed with a much increased degree in comparison with Rhei Radix et Rhizoma counterparts. However, much shorter tmaxwas found in NHJDT group. Therefore, NHJDT with co-existing components enhanced the absorption and influenced the pharmacokinetic behaviors of active ingredients in Rhei Radix et Rhizoma
短波地空ip网络中一种带预约的令牌协议
,刘芸江,白翔,
南京邮电大学学报(自然科学版) , 2014,
Abstract: 合适的信道接入技术是提升网络性能的关键。根据短波地空ip网络通信覆盖范围广、难同步、空中节点信息可能丢失的特点,设计出该网络一种新型的带预约短波令牌协议(hftpr),给出了区分空中节点优先级数据和常规级数据的预约算法,并利用opnet软件进行了网络建模和不同参数配置下的仿真。仿真结果表明,该协议能提供较高的预约成功率和较好的实时性,且优先级预约比常规级预约更快接入信道,克服了短波令牌协议(hftp)直接应用于短波地空ip网络时可能出现的通信中断,可满足网络需求。
熔融盐循环热载体无烟燃烧体系的选择
何方,王华,永年,胡建
工程热物理学报 , 2003,
Abstract: 介绍了一种全新的燃烧系统-熔融盐循环热载体无烟燃烧技术。本技术将燃料与助燃空气的燃烧分为氧化剂的生成和燃料与氧化剂接触反应两个过程。并且这两个阶段通常在两个反应室中进行,在氧化剂生成室,空气中的氧全部被氧载体吸收,剩余的高纯度氮气则被回收利用;在燃烧室,氧载体把自身的一部分或全部氧传递给燃料,完成燃烧过程。在燃烧室中,若燃料完全反应,那么只有高纯度的CO2生成,也可以直接回收用作化工原料。因为N2从燃烧系统中分离出去,且硫和重金属元素被熔融盐吸收而不被烧掉,所以燃烧过程没有NOx、CO2、和SO2等污染物的排放。本文对几个典型的无烟燃烧系统进行了分析,并与传统燃烧过程进行了比较,对熔融盐循环热载体无烟燃烧体系的选择具有指导意义。
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