隐性缺铁婴幼儿脑功率谱及脑地形图变化研究

采用严格配对的研究方法，对２０对６～３０个月隐性缺铁（ＬａｔｅｎｔＩｒｏｎＤｅｆｉｃｉｅｎｃｙ，ＬＩＤ）婴幼儿进行了脑功率谱和脑地形图分析。结果显示ＬＩＤ患儿在右后顶部、左中后颈、右中颞及前中央顶部α１能量减低，提示ＬＩＤ患儿大脑发育比正常组婴幼儿落后。     

中国铁路运输成本计算系统的研究

在中国铁路运输成本计算系统（ＣＲＣＳ）中，将铁路运输生产过程划分为发送、中转、运行和到达４个作业环节，并通过确定作业量以及对应的单位变动支出计算铁路运输成本。此外，对运输成本信息的运用以及计算机实现进行了讨论。     

近年来中日两国民众的相互认识——基于民意调查结果的分析

相互既期待又疑虑，对双边关系的展望也是乐观论和悲观论并存，中日民众相互间的这一认识特征及深层的若即若离的社会心理，实际上是两国间在经济、科技等领域既存在着互补性，又因历史和现实问题而导致互不信任的矛盾状态的反映。     

The small-sized benthic biota of the Håkon Mosby Mud Volcano (SW Barents Sea slope)

R/V POLARSTERN expedition ARK XVIII/1 in summer 2002 provided the opportunity to carry out a sampling programme to assess the activity, biomass and composition of the small-sized benthic biota (size range: bacteria to meiofauna) around the active mud-oozing and methane-seeping Håkon Mosby Mud Volcano (HMMV) on the SW Barents Sea slope, Northern North-Atlantic. A total of 11 stations, covering different areas (e.g., bacterial mat sites, and pogonophoran fields) within the crater, and sites outside the caldera were sampled using a multiple corer. Subsamples were analyzed for various biogenic compounds to estimate the flux of organic matter to the seafloor (sediment-bound chloroplastic pigments indicating phytodetritus), activities (bacterial exo-enzymatic turnover rates) and the total biomass [from bulk parameters, like phospholipid (PL) concentrations in the sediments] of the smallest sediment-inhabiting organisms (range: bacteria to meiofauna). Direct investigations of bacterial numbers and biomasses as well as on meiofauna densities and composition completed our investigations at HMMV. As expected for a comparable small deep-sea area with only minor disparity in water depth between sampling sites, our investigations revealed generally no significant differences in organic matter input from phytodetritus sedimentation between sampling sites inside and outside HMMV. Bacterial exo-enzymatic activities as well as total microbial biomass (TMB) and meiofauna densities, however, exhibited generally higher values at HMMV, compared to sites outside the mud volcano. Enhanced benthic life at HMMV is based on chemosynthetic processes, making the mud volcano a “chemosynthetic oasis” in an otherwise oligotrophic deep-sea environment. As we did not find any indication for bacterial symbioses in the meiofauna, comparably rich meiofaunal assemblages at HMMV are presumably indirectly related to a general enhanced biological production.     

电力牵引工频高压电磁场对人体视—运动反应时的影响

通过对我国电力牵引达２２年区段的２７．５ｋＶ工频电场强度为１．７５－３．４６ｋＶ／ｍ，磁感应强度为０．６０－１．７５ｍＴ，人体感应电流为１０．０８－５８．４０μＡ环境下作业的１３５９名工人和无电磁场接触史的３７５名工人的视－运动反应时值进行的测验和分析。结果表明两组无明显差异。引起视－运动反应时值的延长。结果表明两组无明显差异，引起视－运动反应时值的延长，机体协调功能减退的主要原因是年龄因素的增长     

原发性肾病综合征患儿T细胞亚群及其抑制性细胞活性

本文检测了37例原发性肾病综合征患儿的外周血T淋巴细胞亚群和刀豆素A诱导的抑制细胞活性水平。结果显示,肾病患儿初发时就存在抑制性T细胞数量及功能的减低,并随着激素治疗及病情的好转而恢复正常,提示本病的免疫调节失衡可能是一原发性改变,在肾病发病机理中起一定的作用。     

Modeling household interactions in daily in-home and out-of-home maintenance activity participation

The activity travel patterns of individuals in a household are inter-related, and the realistic modeling of activity-travel behavior requires that these interdependencies be explicitly accommodated. This paper examines household interactions impacting weekday in-home and out-of-home maintenance activity generation in active, nuclear family, households. The in-home maintenance activity generation is modeled by examining the duration invested by the male and female household heads in household chores using a seemingly unrelated regression modeling system. The out-of-home maintenance activity generation is modeled in terms of the decision of the household to undertake shopping, allocation of the task to one or both household heads, and the duration of shopping for the person(s) allocated the responsibility. A joint mixed-logit hazard-duration model structure is developed and applied to the modeling of out-of-home maintenance activity generation. The results indicate that traditional gender roles continue to exist and, in particular, non-working women are more likely to share a large burden of the household maintenance tasks. The model for out-of-home maintenance activity generation indicates that joint activity participation in the case of shopping is motivated by resource (automobiles) constraints. Finally, women who have a higher propensity to shop are also found to be inherently more efficient shoppers.     

Analysis of telecommuting behavior and impacts on travel demand and the environment

The discussion of whether, and to what extent, telecommuting can curb congestion in urban areas has spanned more than three decades. This study develops an integrated framework to provide the empirical evidence of the potential impacts of home-based telecommuting on travel behavior, network congestion, and air quality. In the first step, we estimate a telecommuting adoption model using a zero-inflated hierarchical ordered probit model to determine the factors associated with workers’ propensity to adopt telecommuting. Second, we implement the estimated model in the POLARIS activity-based framework to simulate the potential changes in workers’ activity-travel patterns and network congestion. Third, the MOVES mobile source emission simulator and Autonomie vehicle energy simulator are used to estimate the potential changes in vehicular emissions and fuel use in the network as a result of this policy. Different policy adoption scenarios are then tested in the proposed integrated platform. We found that compared to the current baseline situation where almost 12% of workers in Chicago region have flexible working time schedule, in the case when 50% of workers have flexible working time, telecommuting can reduce total daily vehicle miles traveled (VMT) and vehicle hours traveled (VHT) up to 0.69% and 2.09%, respectively. Considering the same comparison settings, this policy has the potential to reduce greenhouse gas and particulate matter emissions by up to 0.71% and 1.14%, respectively. In summary, our results endorse the fact that telecommuting policy has the potential to reduce network congestion and vehicular emissions specifically during rush hours.     

交通可达性与城市经济活动的空间特征分析：以北京市为例

借助开源大数据平台，提出交通可达性及城市经济活动数据采集策略，利用全局常参数和局部变参数回归模型研究北京市六环区域内两者的空间特征.相比于全局模型，局部模型能够较好地刻画交通可达性与城市经济活动间的空间异质性特征.结果表明，私人交通可达性呈现以天安门为中心径向递减的多圈层结构，公共交通呈现轨道交通沿线区域高的特点.交通可达性与经济活动匹配度具有空间非平稳性，空间分离和匹配现象并存.西北部、中部区域空间匹配特征显著，东北部、东部区域次之，西南区域空间分离现象最为严重.丰台及良乡等分离区域，宜重视道路及轨道线网等基础设施建设工作；未来科学城等私人交通匹配，公共交通分离的区域，可考虑修建轨道线路，并增加公交运营服务水平；中关村科学城、北京经济技术开发区等匹配区域，以调整交通运营管理政策为主.     

CD_3 McAb联合rhIL-2激活的骨髓对白血病细胞杀伤净化作用的研究

目的　探讨CD3单克隆抗体 (CD3McAb)联合重组人白细胞介素 2 (rhIL 2 )激活的骨髓对白血病细胞的杀伤及净化作用。方法　用MTT法检测激活骨髓的细胞毒作用 ;半固体集落培养法观察激活骨髓CFU GM水平和对白血病细胞的净化作用 ;采用间接荧光法测定激活骨髓的免疫标记。结果　CD3McAb与rhIL 2联合激活的骨髓对白血病细胞株K5 6 2、HL 6 0均有明显的杀伤净化作用 ,且优于rhIL 2或CD3McAb单用组 (P <0 .0 5或P <0 .0 1)。rhIL 2和 (或 )CD3McAb对激活骨髓的CFU GM水平无明显影响。CD3McAb +rhIL 2激活的骨髓 ,与活化前及rhIL 2或CD3McAb组相比 ,CD3+ 、CD8+ 、CD1 9+ 、CD2 5+ 、CD38+ 、CD56+ 细胞显著升高。结论　CD3McAb能增强rhIL 2激活的骨髓对白血病细胞的杀伤及净化作用