Waterway traffic analysis of the Chicago River and lock

The vessel-carrying capacity of the Chicago River, Illinois, is restricted by a lock. separating the river from Lake Michigan. Currently, vessels passing through the lock experience long delays during summer months. An investigation and analysis of this system determined that although the system is now generally operating below capacity, the peak periods during summer weekends do approach capacity, and the situation is likely to deteriorate in the future. In addition, the river and lock have safety and traffic conflict problems that need attention. Recommendations to mitigate these problems are described.     

DIG－DNA探针检测宫颈癌组织中人乳头瘤病毒6、11、16、18型DNA

用地高辛配基（Ｄｉｇｏｘｉｎｇｅｎｉｎ）分别标记，制备ＨＰＶ－６、ＨＰＶ－１１、ＨＰＶ－１６及ＨＰＶ－１８的ＤＮＡ探针，应用核酸杂交技术，对３７例宫颈癌活检组织ＤＮＡ作了检测，各型ＨＰＶＤＮＡ的检出率为：ＨＰＶ－６０％（０／３７）、ＨＰＶ－１１２．７（１／３７）、ＨＰＶ－１６６７．５％（２５／３７）、ＨＰＶ－１８１３．５％（５／３７），联合应用ＨＰＶ－１６和ＨＰＶ－１８探针共同检测结果为８１％（３０／３７）。结果显示：我国宫颈癌的发生与ＨＰＶ感染密切相关，联合应用高危型ＨＰＶ探针可提高检出率并可省时、简便。ＤＩＧ标记探针因具特异、敏感、安全和简便诸特点，宜推广应用。     

Performance Potential and Power Consumption of Slow-Active Suspension Systems with Preview

Two possible layouts of a slow-active suspension model are analysed. Optimal control laws for different actuator bandwidths and various amounts of road preview are generated, and estimates of power consumption are made. Higher bandwidth systems (10Hz) require less preview to obtain a given level of performance than those with a lower bandwidth (3Hz) but use more energy in doing so. Similar performance is available from the two systems considered, although the second uses considerably less energy to obtain that performance.     

中国沿海(散货)运输市场月评

本期沿海运输市场行情在煤炭、粮食运价持续上扬的推动下一路上行。11月14日，上海航运交易所发布的沿海（散货）运价指数报收于2281．12点，较上月同期上涨6．64％．综合运价指数再创历史新高。煤炭和粮食运价指数较上月继续上涨，成品油运价指数也略有上扬，原油运价指数基本保持平稳：     

浅论社会保障的利益激励机制及整合发展

本文阐述了建立社会保障机制的重要性及我国社会保障利益激励机制的建立途径。公平是社会保险制度的本质特征 ,而公平本身应该是保护与激励的统一 ,因此 ,社会保障制度就是兼顾保护与激励的公平 ,适度体现激励机制是现代社会保障制度发展的趋势     

Suboptimal Control Design of Active and Passive Suspensions Based on a Full Car Model

An optimal control design method is introduced and then applied to the optimum design of active and passive suspension systems. A basic three-dimensional 7-DOF car riding model subjected to four correlated random road inputs is considered. The design method is basically developed to allow arbitrary choice of sensors for various car state variables to be used for feedback control of each suspension unit. Previous studies show that full-state control laws and even some limited-state control laws often include feedback gains which are almost zero. Some other gains, although not zero, don't play an important role in improving the system performance measures. With the method proposed in this work, every suspension unit can have its own feedback measurements and the criterion function can be related to all state and control variables. Thus a large number of active and semi-active suspension systems with full- or limited-state control laws based on different measurement combination can be suggested, studied, and compared with each other. Instead of comparing these optimized active and semi-active suspension systems with a basic, passive suspension, the passive system itself is optimized with the same criterion. Simulations in the time domain and frequency analyses are performed, and comparisons are made among the systems in terms of r.m.s. car response measures and ISO riding comfort criterion.     

Biochemical composition of marine sediment from the eastern Weddell Sea (Antarctica): High nutritive value in a high benthic-biomass environment

Within the SCAR's international EASIZ programme, as part of the benthic–pelagic coupling experiment, grain size and organic matter contents in marine surface sediment were measured. Samples were taken during the austral autumn of 2000 from 3 regions in the eastern Weddell Sea: Kapp Norvegia, Four Seasons Bank, and Austasen.In general, sediments were fine sand with a grain size fraction < 200 μm representing more than 40% of the total weight. The sediments from Four Seasons Bank (64 to 107 m depth) were coarser than those from Austasen and Kapp Norvegia (209 to 480 m depth), presumably due to winnowing of fine sediment at shallow depths. Organic carbon (OC) content ranged from 0.25% to 1.2% and constituted 10% to 97% of the total carbon. The samples from Kapp Norvegia presented the highest OC values. Overall, protein (PRT), lipid (LPD), and carbohydrate (CHO) contents were similar to those in sediment from cold regions (e.g., the North Atlantic and the Ross Sea) but higher than those in sediment from other Antarctic and more septentrional regions (e.g., the Ross Sea and the Mediterranean). The difference within the Antarctic is explained through the local conditions in Terra Nova Bay and Kapp Norvegia. In the Antarctic, PRT and LPD carbon were the main contributors to the biopolymeric carbon (BPC). In the eastern Weddell Sea shelf, the BPC accounted for more than 90% of the OC in most of the samples. More than 82% of the total PRT, LPD, and CHO were present in the fraction < 200 μm. This work remarks the existence of sediments with a high nutritional value persistent several weeks after the spring–summer pulse of fresh organic matter. It is also highlighted the high potential availability of these sediments (due to its grain size) for the benthic communities inhabiting this high-latitude continental shelf.     

全球海事界的盛会——第十三届中国国际海事展览会

12月6日，作为亚洲最具权威的海事展览会，第13届中国国际海事展览会在上海新国际博览中心隆重开幕！虽然最近上海气温骤降，但两年一届的中国国际海事展览会依然吸引了来自全球海事业界的众多人士，大家齐聚上海，现场气氛火爆。[编者按]     

基于车激动力响应互相关指标的桥梁基础冲刷诊断方法

针对当前桥梁基础冲刷诊断和检测方法过程复杂、成本高且受环境影响大等问题，提出一种基于车激动力响应互相关指标的桥梁基础冲刷诊断方法。该方法通过桥墩和桥跨不同测点的纵向加速度响应自由衰减段信号的互相关分析，建立基础冲刷诊断指标体系，实现冲刷定位和均匀性诊断。首先，依据互相关函数幅值向量置信度判据指标进行基础冲刷初判；然后，通过响应互相关函数幅值向量因子变化率向量进行冲刷定位，再根据横桥向互相关函数幅值变化率向量诊断冲刷均匀性；并通过统计评估方法提高诊断精度；最后，结合1座连续梁桥算例进行多种冲刷工况的数值仿真分析，对所提方法的有效性和适用性进行验证。结果表明：该方法能够很好地实现基础冲刷的定位和均匀性诊断，指标具有较高敏感性；同时具有较好的抗噪性能，通过所提出诊断指标体系的综合使用可消除噪声对诊断结果的干扰。该方法具有诊断结果精度高、过程简便易行、无需进行复杂且误差较大的模态识别、允许试验测试参数和条件适量变化等优点，可嵌入常规桥梁荷载试验同步开展，具有很好的工程应用潜力和实用价值。