A Study on Chinese Electric Home Appliances Industrial M&A

本文主要研究中国家电产业整合并购的相关问题。由于“产业整合并购”尚属新名词，本文首先对产业整合并购的概念进行了理论化的梳理，分析了现阶段产业整合并购所面临的机遇。在此基础上，运用产业组织的理论对中国的家电产业进行了分析，认为中国家电业存在着过度竞争及低绩效现象，产业整合并购是快速改变中国家电产业市场结构、从而改变中国家电产业过度竞争状况、提高家电产业国际竞争力的快捷而有效的路径。在总体结构上，全文分为五章：第一章论述产业整合并购的定义、特征；第二章从国有资产的退出、中国产业集中提高的需求、世界制造中心的转移等角度，对现阶段中国产业整合并购的机遇进行分析；第三章对中国家电业进行产业组织分析，认为...ABSTRACT This dissertation will study chinese electric home appliances industrial M&A. Industrial M&A is new concept ， so I first will define the concept of Industrial M&A ， and then discuss the feature and the opportunity of Industrial M&A in China . Through using the theory of industrial organization to discuss the struture-conduct-perfomance of electri...学位：工商管理硕士院系专业：管理学院工商管理教育中心_工商管理硕士(MBA)学号：20011521

Power Allocation Algorithm Minimizing Outage Probability in Cognitive Radio Relay Network

为提升认知无线中继网络的中断性能,通过分析系统中断概率及用户功率分配情况,提出一种最小化中断概率的功率分配算法。给出在主用户干扰约束和总功率约束; 条件下最小化中断概率的数学优化方程组,根据用户的最大发射功率与干扰电平阈值的受限关系,分别考虑分配功率不超过干扰电平阈值、中继节点功率受限于干扰; 电平阈值以及所有节点受限于干扰电平阈值这3种情况,对应提出3种最佳功率分配方案,并基于KKT条件求解最优值。实验结果表明,该功率分配算法与基于频; 谱共享以及基于机会主义中继选择的中断概率分析方法相比,性能增益提升显著,并且在总功率、干扰电平变化的条件下,所采用的功率分配方案提升系统中断性能; 效果较好。To improve the outage performance of cognitive radio relay network,this; paper proposes a power allocation algorithm minimizing outage; probability by analyzing the system outage probability and user power; allocation conditions. It presents the mathematical optimization; equations minimizing outage probability of under master user; interference constraint and total power constraint. Then, according to; the relationship between the user's maximum transmit power and; interference level threshold,it proposes three optimal power allocation; schemes respectively to deal with three types of cases,including the; distribution of power not exceeding the interference level threshold,the; relay node power limited by the interference level threshold,and all; nodes limited by the interference level threshold. Finally,the optimal; value is solved based on Karush-Kuhn-Tucker(KKT) conditions.; Experimental results show that compared with similar power allocation; methods,the proposed algorithm has obvious performance gain promotion.; And the effectiveness of the adopted power allocation schemes is proved; the most effective in enhancing the system outage performance when the; total power or the interference level is changing.国家自然科学基金; 闽南师范大学教学研究基

Fauna and distribution of Testacea (Protozoa) from Arctic, Antarctic and Tibet

野生动物多样性是生物多样性监测与保护管理评价的关键指标,因此对野生动物进行长期监测是中国森林生物多样性监测网络(CForBio)等大尺度生物多样性监测研究计划的一个重要组成部分.2011年以来,CForBio网络陆续在多个森林动态监测样地开展以红外相机来监测野生动物多样性.随着我国野生动物红外相机监测网络的初步形成,亟待建立和执行基于红外相机技术的统一监测规范.基于3年来在我国森林动态监测样地红外相机监测的进展情况,以及热带生态评价与监测网络针对陆生脊椎动物(兽类和鸟类)所提出的红外相机监测规范,本文从监测规范和监测注意事项等方面探讨了我国森林野生动物红外相机监测的现状和未来.中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)06704-7112

Analysis of pre-S/S gene in occult hepatitis B virus infection from blood donors in Dalian,China

目的了解大连地区无偿献血者隐匿性肝炎乙型病毒感染(ObI)的情况和PrE-S/S区基因的变异情况。方法对大连市血液中心2010年12月2日-2013年5月31日的无偿献血者血液标本进行常规ElISA(HbS Ag、抗-HCV、抗-HIV和抗-TP)和HIV/HbV/HCV联合nAT筛查,对于单独核酸检测反应性的献血者加以跟踪或回溯,结合乙型肝炎血清学标志物的试验、鉴别试验、病毒定量试验和半巢式PCr来确定ObI,同时对ObI的PrE-S/S区基因序列与对照组(HbS Ag+序列,gEnbAnk)做比对分析。结果共筛查158 232份血液标本,确定了其中的69份ObI,流行率为1∶2 293(69/158 232)。41例ObI获得PrE-S/S区基因序列:b型6例、C型34例、d型1例;与对照组相比,ObI在S区的氨基酸序列的变异明显(Pb=0.013;PC=0.003),主要变异位点为b型的V14g/A、y161f/S、V168A、P217l和C型的E2g/A/V、T118r/k/A/M、P127T/l/H/S、E164d/g、l175S、S174n。结论大连地区献血者ObI在HbV基因组S区的氨基酸序列存在多个位点的变异,这些变异与ObI的产生存在某种关系,且这种关系受基因型的影响。Objective To understand the prevalence of occult infection of hepatitis B virus(OBI) and the mutations of pre-S / S gene from blood donors in Dalian.Methods From December 2nd,2010 to May 31 st,2013,samples from blood donors in Dalian Blood Center were screened with enzyme-linked immunosorbent assay(ELISA) for HBs Ag,anti-HCV,antiHIV and anti-TP and triplex nucleic acid detection(NAT) for HIV RNA,HBV DNA and HCV RNA.A follow-up was conducted on donors who were tested negative by ELISA but reactive by NAT.OBI was determined by testing the specimens from the follow-up or archive with serological markers of hepatitis B virus,identification examinations,quantitative and semi-nested PCR.The sequences of pre-S / S gene of OBIs and the control group were analyzed(HBs Ag +,Genbank).Results158 232 blood samples were screened,69 of which were OBIs.The prevalence rate of OBIs was 1 ∶ 2 293(69 /158 232).The pre-S / S gene sequences were analyzed in forty-one cases of OBI:6 were type B,34 were type C,and 1 was type D.Comparing the amino acid sequences between the experimental and control groups,there were statistical significance in the S region of OBI(PB= 0.013;PC= 0.003).The main mutation sites of amino acids for type B were V14 G / A,Y161 F / S,V168 A and P217 L while for type C were E2 G / A / V,T118 R / K / A / M,P127 T / L / H / S,E164 D / G,L175 S and S174 N.Conclusion There were multiple mutation loci on the amino acid sequence of OBI from blood donors in Dalian.A particular relationship existed between these mutations in S region from HBV genome and the mechanism of OBI,which was influenced by genotypes.大连市科技计划指导性项目(大卫科发[2013]50号); 大连市医学重点学科优秀卫生专业技术人才培养资助项目(大卫科发[2013]383号

Characteristics of macrobenthic communities in the estuary of Dagujia River and its adjacent water areas in Yantai, Shandong

为了解烟台大沽夹河河口及邻近海域大型底栖动物群落特征及受干扰情况,于2012年9月在上述区域设置12个采样点进行大型底栖动物群落调查和分析。对采集的生物样品进行物种鉴定、计数和称重,利用生物统计软件PRIMER计算优势度指数(Y)、Shannon-Wiener多样性指数(H')、Margalef丰富度指数(D)和Pielou均匀度指数(J),并进行等级聚类(CLUSTER)、非度量多维标度排序(non-metric multi-dimensional scaling,MDS)及丰度/生物量曲线(abundance and biomass curves,ABC)分析。共采集和鉴定大型底栖动物89..

Long-Term Trends of Macrobenthos in Southern Bohai Sea, China, in Relation toEnvironmental Changes

根据50多年来渤海南部海域大型底栖动物群落的历史资料,以及2011~2013年的现场调查数据,从渤海南部包括黄河口邻近海域及莱州湾大型底栖动物群落结构变化特征出发,分析了其长期演变的过程和规律,旨在阐明底栖动物群落的演变趋势,识别其重要的演变时段.并结合50年来渤海南部海域相关底栖环境因子的变化特征,探讨底栖动物群落的演变原因.过去50余年来,渤海南部海域大型底栖动物群落在物种数、生物量、丰度以及群落结构组成等方面都发生了较大的变动,具体表现为寿命长、体积大、具有高竞争力的K对策种的优势地位正逐渐丧失,而被寿命短、适应能力宽、具有高繁殖能力的R对策种所取代.按照50余年来渤海南部海域大型底栖动..

联合检测HBV前S1抗原和核心抗原的临床意义

目的:探讨联合检测血清HBV前S1抗原(preS1)和核心抗原(HBcAg)(均为HBV核酸相关抗原,nucleic acids related antigen,HBV NRAg)的意义及临床价值。方法:采用ELISA法对393份HBsAg、HBV DNA双阳性的血清和612份HBsAg阴性血清进行HBV NRAg检测,所有标本均采用多区段巢式PCR确认阳性、阴性,采用荧光定量PCR法进行HBV DNA定量分析。结果:393份HBsAg、HBV DNA双阳性血清中,HBV NRAg阳性为382份,其阳性率为97.2%;612份HBsAg阴性的血清标本中,609份确认为HBV DNA阴性,其中检出2份HBV NRAg阳性,607份为阴性,其HBV NRAg的阴性率为99.7%(607/609),另3份HBsAg阴性血清HBV DNA阳性者,其HBV NRAg均为阳性。结论:联合检测preS1和HBcAg的HBV NRAg可作为临床HBV感染的筛选及判断HBV复制的有意义的补充项目

Effect of Flue-gas Cleaning Devices on Mercury Emission From Coal-fired Boiler

为研究燃煤锅炉烟气净化设施对汞排放特性的影响,采用Ontario-Hydro方法,对设有催化脱硝、静电除尘、海水脱硫的300MW燃煤锅炉排放烟气中汞的含量与形态进行分析,同时测定锅炉的煤、底渣、飞灰等固体样品以及脱硫塔前后、曝气之后海水样品中的汞含量。实验结果为:烟气中的气态汞占总汞的79.1%以上,脱硝催化剂对汞的价态具有强烈的转化作用,烟气中83.4%的气态Hg0被氧化成气态Hg2+;静电除尘对颗粒态汞的去除率几乎达到100%;在脱硫塔中,海水对烟气中汞的洗脱率高达73.6%,曝气后排放前的海水中含汞量是新鲜海水的5.5倍。研究表明锅炉烟气净化设施对汞的排放特性有着重要的影响。In order to study the effect of flue-gas cleaning devices on mercury emission from coal-fired boiler, Ontario-Hydro method had been applied to determine the mercury concentration and speciation in the flue-gas emitted from a 300MW coal-fired boiler, which was equipped with various pollution control devices, including selective catalyst reduction (SCR) De-NOx system, electrostatic precipitator (ESP), and flue-gas seawater De-SO2 system (FGD). Mercury concentration in raw coal, bottom ash and fly ash of the boiler, seawater at the inlet and outlet of SO2 absorption reactor and the drainage of aeration sink, were also analyzed. The results indicate that the percentage of gaseous mercury in total mercury discharged is more than 79.1%. De-NOx catalyst strongly affects the mercury speciation transformation, showing a conversion rate of 83.4% for Hg0 to Hg2+. The removal efficiency of particulate mercury by ESP is close to 100%. With seawater FGD, the removal efficiency of mercury is as high as 73.6%. The mercury concentration in the seawater of drainage from aeration sink is 5.5 times higher than that in fresh seawater. The study shows that the flue-gas cleaning devices in coal-fired power plant play an important role on mercury emission characterization

三唑磷对泥蚶急性毒性及血清SOD,CAT酶活性的影响

三唑磷对泥蚶( Tegillarca granosa) 的48 h LC 50为21. 0 mg/ L ,96 h LC 50为10. 2 mg/ L ,依此 设计三唑磷对泥蚶的胁迫质量浓度(1. 1 ,2. 2 ,4. 4 ,22 mg/ L) ,分别于胁迫后第0. 5 ,1 ,2 ,4 ,8 天 及解除胁迫后第4 天采样, 研究三唑磷胁迫后泥蚶血清超氧化物歧化酶(SOD) 和过氧化氢酶 (CAT) 活性的变化情况。结果表明,随三唑磷胁迫浓度和时间的不同,泥蚶血清蛋白质质量浓 度无显著性差异;在0. 5 ,1 d 时各处理组的SOD 无显著影响,从第2 天起,SOD 活性显著下降, 48 h 的LC 50为3. 62 mg/ L ;CAT的活性在第1 天显著升高,而后逐渐降低。三唑磷胁迫下,SOD , CAT活性呈现一定的剂量效应与时间效应。胁迫解除后,蛋白质、SOD 和CAT均得到不同程度的恢复,表明泥蚶具有一定的生理调节机能