完全不确定Hamburger矩阵矩量问题的有限阶解

该文描述带有矩量序列{v_m}_0~∞■C^(q×q)的完全不确定Hamburger矩阵矩量问题:v_m=integral from n=-∞to∞x^m dρ(x),m=0,1,…的有限阶解,即该问题的那些解ρ,使得C^(q×q)-值多项式的线性空间P在对应的空间L^2(R,dρ/E(x))内稠密,这里E(x)为在实轴R上取正值的某个数值多项式.作为预备知识,作者考虑所谓广义Akhiezer插值的矩阵变种与它的相关矩阵矩量问题之间的一种关系.

Prevalence of Methicillin-Resistant <i>Staphylococcus aureus</i>in Raw Hamburgers and Ready-to-Eat Sandwiches Commercialized in Supermarkets and Fast Food Outlets in Brazil

Although well known, Staphylococcus aureus is a bacterium that remains widely studied because of its high pathogenic potential and its ability to develop resistance to antibiotics routinely used in clinical practice. The present study investigated the occurrence of methicillin-resistant Staphylococcus aureus (MRSA) in hamburgers and sandwiches sold in supermarkets and fast food outlets in Salvador, BA, Brazil. Fifty samples of frozen raw hamburgers (25: beef and 25: chicken) and 50 samples of ready-to-eat sandwiches (25: beef and 25: chicken) were collected and investigated for the presence of MRSA. MRSA was present in 32% of the hamburgers and 8% of the sandwiches. The frequency of MRSA was higher in the samples containing chicken meat. However, the statistical analysis showed no association between MRSA presence and the type of meat investigated (P > 0.05). The high prevalence of MRSA in hamburgers and the presence of the microorganism in ready-to-eat sandwiches are worrying and indicate the need for better control during food preparation to prevent the spread of bacteria.

小议bread,sandwich和hamburger的数

一、bread意为“面包”，是不可数名词，在表迭其数量时。要借助于量词。例如：

W.Hamburger公司计划关闭其奥地利Frohnleiten纸板厂

W．Hamburger GmbH公司近日表示，该公司计划于2013年5月关闭其位于奥地利Styria的Frohnleiten纸板厂。该厂有两台纸机，生产挂面纸板和瓦楞原纸，分别为年产9万t的1#机和年产8万t的2^#机。共有100名员工。

Hamburger公司在土耳其新建纸板厂

奥地利Prinzhorn集团旗下Hamburger土耳其分公司将在土耳其伊斯坦布尔投建第三家造纸厂。新纸机将采用最先进的技术生产幅宽7．80m的纸板，预计产能48万t／a，主要是挂面纸板和瓦楞原纸。该项目投资3亿欧元，计划于2020年完成。

基于足尺加速加载试验的高速公路沥青面层力学性能与高温性能研究

针对高速公路改扩建工程老路沥青面层,在120万次足尺加速加载试验条件下,采用动态模量试验评价其力学性能,采用贯入强度试验与汉堡车辙试验评价其高温性能。动态模量试验结果表明,20℃、10 Hz条件下沥青面层芯样0~120万次的动态模量维持在相对稳定的状态,最大值与最小值偏差约为6.9%。贯入强度试验结果表明,0~120万次的沥青面层芯样的单轴贯入强度相对稳定,老路的加铺层、上面层、中面层、下面层的贯入强度变化量分别为-0.04 MPa、0.11 MPa、-0.03 MPa、0.18 MPa。汉堡车辙试验结果表明,加铺层和上面层的芯样总体维持在稳定的状态,中面层和下面层芯样试验结果有一定程度的波动,下面层变化相对明显:汉堡车辙深度的变化率为114.56%,蠕变斜率的变化率为150%。根据120万次足尺加速加载试验结果,该高速公路改扩建工程老路沥青面层在力学性能和高温性能方面表现稳定,扩建后的路面能够满足交通荷载的使用要求。

Relationship between repeated triaxial test and Hamburg wheel tracking test on asphalt mixtures

Both the repeated triaxial test （RTT） and the Hamburg wheel tracking test （HWTT） are adopted to evaluate the high temperature performance of the stone mastic asphalt （SMA） and the mastic asphalt （MA）. The correlation of the permanent deformations of the MA and the correlation of the deformation developments of the SMA between the two tests are analyzed, respectively. Results show that both the two tests can effectively identify the high temperature performance of mixtures, and the correlation between the final results of the two tests as well as that between the deformation developments of the two tests are excellent with R20.9. In order to further prove the correlation, viscoelastic parameters estimated from the RTT results is used to simulate the rutting development in the HWTT slabs by the finite element method （FEM）. Results indicate that the correlation between the two tests is significant with errors less than 10%. It is suitable to predict the rutting development with the viscoelastic parameters obtained from the RTT.

叶面喷硒对‘玫瑰香’葡萄新梢生长及光合系统的调节研究

为探究微量元素硒对葡萄新梢生长和光合系统的调节作用,以9年生大田栽培的‘玫瑰香’自根苗为材料,叶施50、100、150 mg·L^(-1)的亚硒酸钠溶液,在不同时期测定植株新梢生长量,分析光合色素含量以及叶绿素荧光相关指标。结果发现,50 mg·L^(-1)亚硒酸钠处理下,‘玫瑰香’葡萄新梢长度和粗度、节长,以及光合色素含量均高于CK,并且随着外源硒浓度的增加,以上各指标呈现先上升后下降的趋势;50 mg·L^(-1)亚硒酸钠处理增强了‘玫瑰香’葡萄各相位的荧光强度,ETo/RC、ABS/CSo、DIo/CSo、TRo/CSo、ETo/CSo与CK相比有较大差异;不同浓度外源硒处理下,‘玫瑰香’葡萄以吸收光能为基础的性能指数(PI abs)明显上升。综上,适宜浓度硒可提高‘玫瑰香’葡萄叶绿素水平,提高光系统电子传递效率,促进枝条生长,其中50 mg·L^(-1)亚硒酸钠的效果最为明显。

骨料级配对稀薄沥青覆盖层抗车辙性能的影响

稀薄沥青覆盖层(TAO)是一种常用的沥青路面修复技术,其抗车辙性能与骨料级配密切相关。为探究骨料级配差异对TAO混合料抗车辙性能的影响,采用AC-16沥青混合料,设计了最大公称粒径相同的3种骨料级配并对成型试件进行室内车辙试验,设计了5种不同的4.75 mm、2.36 mm通过率级配并对成型试件进行汉堡车辙试验。研究结果表明:骨料级配对TAO的抗车辙性能起着重要作用,混合料骨料级配越细,其内部骨架越难以形成,导致沥青混合料抗车辙能力降低。因此,通过在一定范围内增加粗骨料含量的方式来优化沥青混合料级配,可以明显地提升TAO的抗车辙性能。此外,增大级配4.75 mm、2.36 mm的筛孔通过率,会使沥青混合料击实空隙率减小,使汉堡车辙深度更大,导致其抗车辙能力下降;且当空隙率<4%时,汉堡车辙深度受空隙率影响更加显著;因此,在实际的工程应用中可通过减少级配4.75 mm、2.36 mm的骨料含量来大幅提升TAO的抗车辙能力。

Study on Differences in Procyanidine Content Between Muscat Hamburg Grape From Different Producing Areas

[Objectives] This study was conducted to analyze the differences in procyanidine content in grapes caused by different producing areas. [Methods]With Muscat Hamburg grape from different producing areas as an experimental material,procyanidine content was determined by n-butanol-hydrochloric acid colorimetry. [Results] The procyanidins contents in different parts of the same variety ranked as grape seed > grape skin > grape flesh. The procyanidins contents in grapes from different producing areas were in order of Changli County,Hebei Province > Dazeshan Town,Shandong Province > Hangu District,Tianjin City.[Conclusions]The procyanidins contents in Muscat Hamburg grapes from different producing areas differ to a certain degree.

Attitudes of young scholars in Qingdao and Hamburg about climate changeand climate policy The role of culture for the explanation of differences

This article analyses differences in the attitudes related to climate change of young scholars in environmental science in Qingdao (China) and Hamburg (Germany). The main aim of the article is to evaluate the role of cultural differences for their explanation. We expect no significant differences in the attitudes related to the findings of climate research, since scientific principles are the joint basis of the scientific discourse wordwide. However, we expect that there are differences in the attitudes of the young scholars about the role of science, of the state and of the civil society for dealing with the challenge of climate change. We suggest that these can be explained with substantial cultural differences between both societies, with regard to the role of the state and the civil society for the solution of environmental problems. In order to evaluate these hypotheses, we have conducted a comparative survey among environmental science students in Qingdao (China) and Hamburg (Germany) about their attitudes towards climate change. The findings support our main hypotheses. The young scholars in Qingdao and Hamburg differ substantially in their views of the role of science in society and policymaking. Plausibly, these differences may mainly be explained with differences in the cultural ideas about the role of the state and of the civil society for the solution of environmental problems. Gradual differences in the share of young scholars who think that climate change has anthropogenic causes, may be explained with differences in the curriculum but also by cultural habits. This article makes a new contribution to the scientific debate by exploring the role of cultural differences for differences in the attitudes of young scholars in environmental science in connection with climate change and climate policy in different cultural contexts.

Comparison of Soil Nutritional Status between Different Muscat Hamburg Vineyards in Coastal Areas of Tianjin

To study the effects of different soil conditions on winter nutrient storage of Muscat Hamburg branches,this study compared the soil texture,bulk density,total salt content and soil K,Ca,Na,Mg and total Fe contents of Muscat Hamburg vineyards in Ninghe District and Hangu District,Binhai New Area of Tianjin and analyzed the soluble sugar and soluble protein contents in one-year-old vine branches. The results showed that the soil p H was lower,and the soil K,Ca and total salt( 0. 445%) contents were higher in the vineyard of Ninghe District than those in the vineyard of Hangu District. There were no significant differences in the soil Mg,Fe and Na contents between the vineyards in the two regions. The soil of the vineyard in Ninghe District is medium loam,and that in Hangu District is heavy loam. In short,all the soil indicators of the vineyard in Ninghe District were better than those in Hangu District except the indicator of soil salt content. The soluble sugar and soluble protein contents of one-year-old vine branches differed significantly between the two regions.

阿迪达斯Hamburg再发绿色和蓝色款式

此前,有一些阿迪达斯Hamburg运动鞋的新发款式,但是已经沉寂了一段时间。本次,阿迪达斯Hamburg运动鞋为绿色和蓝色款式的回归举行了欢迎式。Hamburg作为都市经典系列诞生在上世纪八十年代。主要区别在于表面抛光,现在的款式是柔软的牛巴戈表面。可选择的颜色有绿色加黄色细部或者太阳蓝加红色细部。

From Hangzhou to Hamburg: Africa at the Center

GERMANY launched two important Africa-focused initiatives during its G20 presidency this year. One is Compact with Africa put forward by Federal Ministry of Finance of the country, aiming at taking joint measures to improve sustainable infrastructure, enhance investment framework and support education and capacity building in Africa. The initiative, participated by world multilateral financial institutions such as the African Development Bank,

CPPU对设施栽培玫瑰香葡萄无核化及果实品质的影响

试验以日光温室棚架栽培的10年生玫瑰香葡萄为材料,在始花期、盛花期、花后3 d等3个时期分别用5、10 mg/L CPPU浸蘸花穗,以清水为对照,探究不同时期CPPU处理对玫瑰香葡萄无核化及果实品质的影响,旨在为设施栽培玫瑰香葡萄在宁夏的生产提供有效的无核化处理方案。结果表明,不同处理葡萄的无核率均高于对照,其中,A5(花后3 d,5 mg/L CPPU)和A6(花后3 d,10 mg/L CPPU)处理葡萄的无核率分别为92%、94%;A1(始花期,5 mg/L CPPU)、A2(始花期,10 mg/L CPPU)、A5、A6处理的果实品质较对照均有不同程度提高,且不同时期和不同质量浓度处理对各品质指标均有交互作用。主成分分析结果表明,A6处理得分最高,品质最佳,A4(盛花期,10 mg/L CPPU)处理得分最低,品质最差,且低于对照。设施栽培的玫瑰香葡萄在宁夏的生产在花后3 d用10 mg/L CPPU处理花穗,能获得无核化率高且品质好的果实。

花岗岩沥青混合料水稳定性影响因素分析

为了促进酸性集料在道路工程中的资源化利用,选择典型的酸性花岗岩石料制备沥青混合料,通过冻融劈裂及汉堡车辙试验,分析粉尘质量分数、空隙率、沥青用量和拌和工艺等因素对花岗岩沥青混合料水稳性能的影响。结果表明,随着粉尘质量分数的增加,花岗岩沥青混合料水稳定性能衰减严重,当粉尘质量分数由4.6%提高到17.6%,剥落拐点降低了36%。花岗岩沥青混合料密实状态显著影响水稳定性,当空隙率减小2.2%,冻融劈裂强度比提高了约20%;与油石比3.9%相比,最佳油石比4.2%的沥青混合料剥落拐点有大幅提升。采用先将粗细集料与沥青拌和再加入矿粉的方式,花岗岩沥青混合料的空隙率较低,具有良好的水稳定性。在施工过程中需要严格控制集料的粉尘含量,通过组成设计和拌和工艺优化来提高花岗岩沥青混合料的水稳定性。

SBS改性沥青及其混合料高温性能试验对比分析

为了研究不同SBS种类与其掺量对SBS改性沥青和其混合料高温性能的影响,从多个维度对其高温性能进行敏感性分析。采用动态剪切流变试验(DSR)、车辙试验、汉堡浸水车辙试验对不同SBS掺量的星型、线型SBS改性沥青和混合料进行研究分析。试验表明,SBS改性沥青的G*与G*/sinδ对SBS掺量的敏感度随掺量的增加而提高,对改性剂类型的敏感度随SBS掺量的增加而降低。J nr对SBS掺量的敏感度随掺量的提高而下降,而对SBS类型的敏感度随SBS掺量的升高而增加。改性沥青混合料的动稳定度随着SBS掺量增加而增加,并且其对SBS改性剂类型更为敏感。数据归一化结果展现了DSR振荡试验对SBS掺量较为敏感;车辙试验和汉堡浸水车辙试验表明混合料对SBS改性剂的类型更为敏感,星型SBS改性沥青的高温性能更加优异。

基于汉堡车辙试验铁尾矿沥青混合料耐久性研究

通过正交试验设计了不同混合料类型、铁尾矿掺量、沥青用量和石灰用量的铁尾矿沥青混合料,采用浸水汉堡车辙试验分析了不同类型铁尾矿沥青混合料在高温和浸水条件下的耐久性,采用统计学方法提出了铁尾矿沥青混合料耐久性设计指标及标准.结果表明:混合料类型、铁尾矿用量、沥青用量和石灰用量均对铁尾矿沥青混合料的加载次数、轮辙深度和总变形速率D r具有不同程度的显著影响,且铁尾矿用量对耐久性影响最为显著.铁尾矿用量超过15%时,石灰用量低于1.5%时,混合料耐久性将产生显著降低.建议在高温和多雨环境下,铁尾矿沥青混合料应进行耐久性设计检验,且应满足加载次数不小于20000次,轮辙深度不大于10 mm,总变形速率D r不大于1.6 mm/h的技术要求.

城市国际传播的“德国模式”——基于汉堡市的考察

通过回顾和梳理过往相关文献,本研究总结出我国城市国际传播研究中基于“媒介文本”“评估体系”以及“案例分析”的三种范式,并点明了当前案例研究中对于国外经验借鉴的不足。因此,本研究以“可沟通城市”概念为线索,探察汉堡市独特的国际传播实践。研究发现,支撑和推动汉堡市国际传播发展的主要是以港口为核心的地理网络、高度发达的媒体矩阵所搭建的信息网络和以跨文化为战略的意义网络的合力。城市国际传播的“德国模式”为我国城市国际传播提供了一定的借鉴意义和参考价值。