oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 38 )

2018 ( 508 )

2017 ( 482 )

2016 ( 532 )

Custom range...

Search Results: 1 - 10 of 29522 matches for " 苏轼鹏 "
All listed articles are free for downloading (OA Articles)
Page 1 /29522
Display every page Item
中国海海浪波周期季节特征的精细化模拟分析
Meticulous Simulation of Seasonal Characteristics of the China Sea Wave Period
 [PDF]

郑崇伟, 黎鑫, 孙成志, 苏轼, 陈璇
Adances in Marine Sciences (AMS) , 2014, DOI: 10.12677/AMS.2014.12007
Abstract:
海浪波周期是波浪能资源开发、舰船航行安全等重点关注的要素之一,也是目前海浪研究的瓶颈。由于资料稀缺的限制,针对海浪波周期的研究可谓凤毛麟角。本文以CCMP风场驱动目前国际先进的第三代海浪数值模式WW3 (WAVEWATCH-III),模拟得到首份覆盖整个中国海、长时间序列、高时空分辨率、高精度的海浪场数据,首次实现了中国海海浪波周期季节特征的精细化研究,期望可以为“海之梦”、“中国梦”尽绵薄之力。研究结果表明中国海的海浪波周期存在较大的季节性、区域性差异,且与季风存在密切的关系:1) 中国海的波周期在1月和10月整体大于4月和7月。渤海的波周期在各个季节都小于其余海域。1月、4月和10月,海浪波周期的大值区主要分布在25?N以南,而7月主要分布于15?N以北。2) 从年平均海浪波周期的分布特征来看,南中国海大部分海域、东海大部分海域以及菲律宾以东近海的年平均波周期明显大于其余海域,高值中心分布于南海北部海域。3) 在季风期间(包含冬季风和夏季风),季风影响明显的区域波周期较小,而其余海域的波周期则偏高。
The wave period is close to the development of wave energy resource, navigation, ocean engineering, prevents and reduces sea wave calamity, and so on. In this study, the first China Sea wave data were obtained, using WW3 wave model forced by CCMP (Cross-Calibrated, Multi-Platform) wind field. Then the seasonal characteristics of the China Sea wave period were analyzed. Results showed that, 1) Wave period in January and October was greater than that in April and July. Wave period in the Bohai Sea was smaller than that in other waters all year round. In January, April and October, large area of wave period was mainly located in the south of 25?N, while in the north of 15?N in July. 2) From annual average wave period, values in the South China Sea, East Sea, and east of Philippine was greater than that in other waters. 3) During the period of monsoon, wave period in the area affected by the monsoon was larger than in the area not affected by the monsoon.
一类非线性变系数波方程解的存在性
The Existence of a Class of Nonlinear Wave Equations with Variable Coefficients
 [PDF]


Pure Mathematics (PM) , 2013, DOI: 10.12677/PM.2013.35051
Abstract:
本文研究了系数依赖于x的一维波方程当共振发生在特征值rN处的解的存在性,主要利用Mawhin连续性定理,进而得到了一个类似于文学性的结果。
>This paper is devoted to the existence results for the one dimensional wave equation with x-de- pendent coefficients when resonance occurs at the eigenvalue rN . By using the Mawhins continuation theo- rem, the authors get a result which is similar to the literature.
论套期保值中金融工具侧盈亏的性质
On the Nature of Financial Tool Side of Profit and Loss in the Hedge
 [PDF]


Finance (FIN) , 2015, DOI: 10.12677/FIN.2015.52005
Abstract:
在套期保值中,金融工具侧能与现货侧匹配上的盈亏,其性质是风险对冲因子,不直接影响企业的损益,无论是盈是亏,无论盈亏多少,都不应该“大惊小怪”。金融工具侧因基差产生的盈利,其性质类似于财产清理中恰逢相关资产价格走高所获得的非正常收益;而亏损的性质类似于财产保险中投保人所获得的保险赔偿不能完全覆盖其财产损失部分。金融工具侧因套保方案执行不严格所产生的盈亏,其性质属于企业投机所产生的盈亏,应该加强管理,避免发生。
In a hedging, profits and losses made by financial tools can be matched with those made by spot exchanges. The hedging of risk does not directly affect the profit and loss of the enterprise. Re-gardless of its profitability and the amount of profit or loss, one should not fuss. Profits generated by changing of basis in financial tools are similar to the abnormal returns gained by rising of the relevant asset prices in the property liquidation, while losses are similar to those parts of property losses which the insurance cannot cover. Profits and losses of an enterprise caused by a lax ex-ecution of hedging scheme should belong to those profits and losses made by speculation. The en-terprise should strengthen management to avoid this.
生活垃圾焚烧厂渗滤液处理工艺的改造研究—以广西某生活垃圾焚烧厂为例
Reconstruction of Treatment Process for Leachate from Municipal Solid Waste Incineration Plants—A Case of a Municipal Solid Waste Incineration Plant in Guangxi
 [PDF]


Water pollution and treatment (WPT) , 2016, DOI: 10.12677/WPT.2016.41001
Abstract:
《生活垃圾焚烧污染控制标准》(GB 18485-2014) (简称新标准)于2014年7月1日开始实施,该新标准对在焚烧厂内对渗滤液进行处理后外排的出水水质要求高于《生活垃圾焚烧污染控制标准》(GB 18485-2001) (简称旧标准)。因此,一些焚烧厂需要对原处理工艺进行改造才能满足新标准的要求。广西某生活垃圾焚烧厂原渗滤液工艺是预处理 + UASB + 两级消化、反硝化 + 外置式MBR + RO,该工艺处理后的出水的SS、重金属浓度高于新标准的限值,但对有机物的去除、脱氮已能满足新标准的要求,为节省投资,尽可能的保留原有的生化处理单元,将调节池改为溢流池,将UASB改为UBF,并增加了均衡池、纳滤单元,改造后的工艺为预处理 + UBF + 两级消化、反硝化 + 外置式MBR + NF + RO。从改造工艺各处理单元对污染物的去除效果看,渗滤液经改造工艺处理后能满足新标准的要求。
Standard for pollution control on the municipal solid waste (MSW) incineration (GB 18485-2014) was implemented on July 1, 2014, which was called new standard in this article. However, treat-ment process for leachate existing in some incineration plants was designed according to the re-levant requirement specified in Standard for pollution control on the municipal solid waste (MSW) incineration (GB 18485-2001), which was called old standard in this article. Requirements about effluent quality in new standard were higher than that in old standard. Therefore, some incinera-tion plants need to reconstruct original treatment process to meet the requirements of the new standards. Original treatment process for leachate of a MSW incineration plant in Guangxi included pretreatment, UASB, two-stage digestion and denitrification, external MBR and RO. As far as this original treatment process was concerned, the removal efficiencies of organics and nitrogen could meet criteria specified in new standard, but those of SS and heavy metal could not. When the original process was reconstructed, biochemical treatment unit in original process was retained as much as possible to save investment. The main tasks of reconstruction were to respectively change regulation tank and UASB into overflow tank and UBF and to add equalization tank and NF. So reconstruction process includes pretreatment, UBF, two-stage digestion and denitrification, external MBR, NF and RO. From removal effect of pollutants in various processing units, the effluent quality from reconstruction process can reach the discharge concentration limits of the new standard.
基于SVAR模型对商品价格波动和居民消费关系的讨论
Discussion Based on the SVAR Model of Commodity Price Volatility and Consumer Relations
 [PDF]

张昆
E-Commerce Letters (ECL) , 2012, DOI: 10.12677/ECL.2012.13005
Abstract:

本文运用结构向量自回归(SVAR)模型,深入分析了2000年到2012年月度商品零售价格指数与居民消费价格指数二者之间的关系,进行了相应的单位根检验,在VAR模型的基础上做出SVAR模型,由此获得了该模型中两变量长期稳定的关系,分析得出,二者受自身前期影响较大,且上期商品零售价格对于居民消费价格有明显的正相关影响(影响系数为0.44)。并在此基础上建立了脉冲响应函数,继而做出了(SVAR)模型的脉冲响应函数分析。

This paper tries to analyse the relationship between the retail price index and consumer price index with the structural vector auto regression (SVAR) model when it was 2000 to 2012 monthly. With the VAR model we have the unit root test, in which we get the long-term stable relationship between two variables in the model analysis. With their own pre-impact, the retail price has a significantly positive effect on the consumer price (which affects coefficient of 0.44). On this basis, with the establishment of the impulse response function we make (SVAR) model impulse response function analysis.

 

基于非线性理论的脉搏主波间期序列的识别
Comparative Analyses of PP Wave Intervals Based on Nonlinear Chaotic Theories
 [PDF]

韩清
Applied Physics (APP) , 2012, DOI: 10.12677/APP.2012.23012
Abstract:

本文研究采用基于混沌理论的两种非线性参数估计方法(代替数据法和Lyapunov指数估计法)对两组不同生理病理条件下脉搏主波间期序列进行分析。首先对上述两种算法进行介绍,然后对脉搏主波间期序列进行对比分析。分析结果表明,在时域波形上直观相似的非平稳信号,用上述非线性混沌分析的方法可以有效地加以定量区分。对于不同生理病理条件下的脉搏主波间期系列,由代替数据法所得到的特征参数的特征概率值均小于0.05,拒绝随机假设,信号的混沌特性得到辨识,由此可判断出所计算的脉搏信号具有混沌特征;两组信号的最大Lyapunov指数均为正值并有明显差别。根据代替数据法中的概率值的大小和最大Lyapunov指数可以看出,心律不齐患者比正常人员具有更明显的混沌特征。
 In the paper, two nonlinear estimation methods based on chaotic theory, surrogate data method and Lyapunov exponents, are used to distinguish the difference of PP wave intervals (time series of the pulse main peaks). After brief introduction of the corresponding algorithms, two typical different healthy state signals of PP wave intervals are compared by using the two methods. The obtained results demonstrate that the signals are distinguished effectively in quantitative way. With surrogate data method, which is applied to identifying the existing chaos of PP intervals of pulse, it is proved that the series of PP intervals of pulse are chaotic. Largest Lyapunov exponents of PP wave intervals are calculated. The Largest Lyapunov exponents of the two kinds of signals are both positive and different from each other. The chaotic character of arrhythmia is much more significant than that of healthy state.

糖尿病原因浅析
An analysis of the reason for Diabetes
 [PDF]


Health Review (HR) , 2012,
Abstract: 很长一段时间内,医学界对于糖尿病的致病原因存在着误解,即认为谷物会导致尿糖增多,继而诱发或加重糖尿病,这使得许多糖尿病患者在实际的治疗中总是避免进食谷物.本文从《本草纲目》关于消渴症的记载出发,通过对谷物类主食的营养的全面分析,认为谷物摄入过多不会造成尿糖增多,反而谷物缺乏才是导致糖尿病的重要原因,并进一步得出正是现代中国人食物结构的巨变最终造成了糖尿病的流行。For a long time, the medical have some misunderstandings for the reason that causes   diabetes. Some researchers find grain can cause or aggravate diabetes, Which makes many diabetic patients always avoid eating corn in the treatment. The article concludes that lack of grains is the main reason for diabetes. This conclusion is based on records about diabetes in Compendium of Materia Medica, and a general analysis of nutrition in grain.
基于HHT与TEO融合的谐振接地故障选线
Fault Line Selection for Resonance Grounding Based on the Combination Algorithm of HHT and TEO
 [PDF]

杨明,
Smart Grid (SG) , 2012, DOI: 10.12677/SG.2012.24022
Abstract: 本文提出了基于希尔伯特–黄变换(Hilbert-Huang Transform, HHT)与Teager能量算子(Teager Energy Operator, TEO)相融合的谐振接地选线新方法。首先对零序电流信号进行经验模态分解法(Empirical Mode De-composition, EMD)分解,然后将TEO合理的引入选线算法中,并与HHT极性判别法相融合,实现了HHT与TEO两者融合的优势互补。通过仿真分析,验证了所提方法的可行性和有效性。
The combination method of Hilbert-Huang Transform (HHT) and Teager Energy Operator (TEO) for fault line selection with resonance grounding is proposed in this paper. The zero sequence current signals are decomposed using Empirical Mode Decomposition (EMD). The TEO is reasonable introduced into algorithm of fault line selection. The TEO is combined with the method of HHT polarity estimate. The complementary advantage for combination method of HHT and TEO is implemented. The feasibility and effectiveness of the proposed method is verified by simulation results.
并行求解抛物型方程的AGE算法在边值处的改进
The Improvements of AGE Algorithm for Parallel Solving Parabolic Equations at the Boundary
 [PDF]

王栋,
Pure Mathematics (PM) , 2011, DOI: 10.12677/pm.2011.12018
Abstract:
AGE方法是一种求解偏微分方程的并行算法,通过重新构造有限差分格式,把所要求解的差分方程组分裂成若干个可以独立并行求解的规模较小的方程组。但此种算法在靠近边值处误差较高,本文在靠近左右边界处对格式进行改进,得到一种在边值处改进的AGE方法。该方法在边界附近尽可能的保持较小的截断误差,从而提高了计算精度。
AGE method is a parallel algorithm for solving partial differential equations, by re-construct a finite difference scheme, so the required solution of difference equations can be split into several smaller inde-pendent parallel solution of equations. However, this algorithm gets higher truncation errors near the boun-dary. In this paper, I get an improvement AGE method, by improving the format close to the left and right boundaries. The method stays as smaller truncation errors in border, so can improve the calculation ac-curacy.
基于ArcGIS Model Builder的地形指数提取方法及实践研究
The Study on Terrain Index Extraction Method and Practice Based on ArcGIS Model Builder
 [PDF]

肖燕,
Geomatics Science and Technology (GST) , 2013, DOI: 10.12677/GST.2013.13003
Abstract:
流域地形指数水文模型TOPMODEL已被应用于陆面模式(Land surface Models, LSMs)以改进陆面模式对水文过程的模拟。地形指数(ln(α/tanβ))是TOPMODEL的核心,是进行水文分析的重要指标。因此,高效的提取地形指数信息非常重要。本文将淮河流域作为案例区,以地形指数单流向算法为理论基础,利用ArcGIS9的Model Builder建模工具,建立地形指数提取模型。在模型设计过程中充分考虑到汇流面积、坡度等参数的有效性,使模型具有较高的通用性。使用者启动模型加载数据即可简单又快速地获得地形指数分布数据。
River terrain index TOPMODEL hydrological model has been applied to Land surface model (Land surface Models, LSMs), to improve Land surface of hydrological process simulation model. The core of TOPMODEL is terrain index (ln(α/tanβ)). And it is an important index on the hydrologic analysis. Therefore, effective extracting terrain index information is very important. In this paper, the huaihe river basin as a case area, the terrain index extraction process model is build, using the ArcGIS9 Model Builder tools. This model is based on a single flow algorithm for calculating process. Model has higher versatility, because of fully considering the effectiveness of the parameters such as the slope and the flow accumulation in the model design process. Using this model can be very simple and quick to get terrain exponential distribution data of terrain index.
Page 1 /29522
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.