安谷水电站库尾生态泄水闸门群智能启闭系统技术改造实践

随着生态保护意识的提高和科技的进步,对闸门群进行智能化的改造成为一种趋势。文章详细阐述了安谷水电站库尾生态泄水闸门群智能启闭系统技术改造实践的整个过程。改造过程中特别注重了智能化技术的应用,如远程监控、自动化调节、数据分析等。

鲁中南上前寒武系土门群的时代归属问题

本文通过对鲁中南上前寒武系土门群地质特征的研究,确定了土门群各组的时代归属,并应用数学地质方法划分了化学地层,进而通过苏皖北部和辽南上前寒武系的对比,阐明了晚前寒武纪华北地块东南缘的古构造环境。

基于DBSCAN聚类的群目标分离与合并跟踪算法

针对杂波环境下群目标分离与合并时跟踪精度变化较大的问题,提出一种基于DBSCAN(Density-Based Spatial Clustering of Applications with Noise)的群目标分离与合并跟踪算法。该算法首先根据群目标模型、落入群目标跟踪门中的量测数量与群目标关联门交叉区域的预测群中心数量来判断群分离或合并的可能性;然后,通过DBSCAN算法对群目标关联门中的量测进行聚类,进一步确定群目标是否发生分离或合并;最后,根据新群目标跟踪门中的等效量测方差计算并更新对应的群目标跟踪门大小和群成员数量。仿真结果表明,相比于传统群目标的分离与合并跟踪方法,该算法保证了群目标分离与合并检测的实时性,提高了分离或合并前后的跟踪精度。

群目标重心跟踪过程中的群合并算法研究

在目标跟踪过程中,当目标满足群目标条件时,多目标跟踪由于跟踪波门交叉严重,往往会误相关,因此传统的多目标跟踪方法在群目标跟踪中并不适用。为了能够有效跟踪群目标,及时获得群目标的动态信息,研究人员提出了群目标重心跟踪的思想。合并是群的一大特征,也是群跟踪过程中的一大难点。在群重心跟踪算法基础上,把合并分为点迹与航迹合并,以及航迹与航迹合并两种情况。后者采用双门限方法判断群是否可以合并,并分析了群跟踪门的构建过程。仿真验证结果表明,在群合并过程中,依然能够稳定跟踪。因此,该算法能够有效跟踪群目标,及时获取群目标的动态信息。

羌塘北部拗陷东段晚三叠世地层沉积特征对比

研究区内晚三叠世土门格拉群(组)、结扎群、巴塘群分布于长江源各拉丹冬地区南北两侧,夹于金沙江缝合带南侧和前缘隆起带之间,呈NW向带状分布.笔者在1∶25万区域地质调查基础上,通过实测剖面的详细研究和区域对比,从生物群面貌、岩石类型及其组合、基本层序和沉积相角度进行了分析.沉积古地理格局显示出总体南浅北深的特点,南部靠近羌塘盆地中央隆起带,陆源物质供应丰富;向北至雀莫错一带因远离中央隆起,陆源物质供应相对较少,泥、灰岩增多,灰岩中化石丰富,双壳类、菊石类等生物群得以快速发展;沿北东,靠近金沙江缝合带,受其活动影响而表现出火山活动频繁.这3个群(组)可很好对比,基本特征相同,因此认为是同一地质时期同一构造单元不同构造部位之沉积产物.

REVERSIBLE LOGIC GATE NETWORK CASCADE BASED ON PERMUTATION GROUP

The cascade of reversible logic gate network with n inputs and n outputs forms a group isomorphic to the symmetric group S2^n. Characteristics of a number of gates from the set of all generalized Toffoli gates are studied. Any permutation Sn is proved to be generated by a n-cycle 9 and a permutation τ= （ij,ik） together. It shows that any neighboring 2-cycle permutation can be generated by at most two NOT gates without ancilla bit. Based on the above theory, a cascade algorithm for reversible logic gate networks is proposed. A reversible example of logic gate network cascade is given to show the correctness of the algorithm.

进口门禁系统产品专题——进口门禁群雄起 逐鹿中原逞英豪

当门禁产品刚在国内安防市场上崭露头角时．我们所能见到的绝大多数都是进口品牌的产品随着国内安防市场的逐渐成熟和国内安防厂家实力的日益增强．进口门禁产品凭借品质高、稳定性好等技术优势，依然占据国内市场的半壁江山，本期产品大剖析栏目．将对市场上颇具代表性的10款进口门禁产品进行实测，为您呈现出他们之间共通之处和各具特色的技术。同时，我们也把生物识别产品的测试加了进来．因为作为门禁系统中的前端设备．生物识别产品最大的特点就是采集人体上某个器官的信息，来进行身份识别。您不妨欣赏完进口门禁系统产品专题后，再仔细阅读一下生物识别产品专题和精品赏析栏目。当然，在产品测试栏目后，为您带来了一些探讨门禁技术的文章和应用案例，以及产品精选和厂家名录，这可都是来第一线的最新资讯哟，千万不要错过。

Relatedness of Helicobacter pylori populations to gastric carcinogenesis

Helicobacter pylori （H. pylorl） is a Gram-negative bac- terium that infects half of the human population. The infection is associated with chronic inflammation of the gastric mucosa and peptic ulcers. It is also a major risk factor for gastric cancer. Phylogenetic analysis of global strains reveals there are seven populations of H. pylori, including hpAfrical, hpAfrica2, hpEastAsia, hpEurope, hpNEAfrica, hpAsia2 and hpSahul. These populations are consistent with their geographical origins, and pos- sibly result from geographical separation of the bac- terium leading to reduced bacterial recombination in some populations. For each population, H. pylori has evolved to possess genomic contents distinguishable from others. The hpEurope population is distinct in that it has the largest genome of 1.65 mbp on average, and the highest number of coding sequences. This confers its competitive advantage over other populations but at the cost of a lower infection rate. The large genomic size could be a cause of the frequent occurrence of the deletion of the cag pathogenicity island in H. pylori strains from hpEurope. The incidence of gastric cancer varies among different geographical regions. This can be attributed in part to different rates of infection of H. pylori. Recent studies found that different popula- tions of H, pylori vary in their carcinogenic potential and contribute to the variation in incidence of gastric cancer among geographical regions. This could be related to the ancestral origin of H, pylori. Further studies are indi- cated to investigate the bacterial factors contributing to differential virulence and their influence on the clinical features in infected individuals.

Omeprazole-based triple therapy with low-versus high-dose of clarithromycin plus amoxicillin for H pylori eradication in Iranian population

AIM： To investigate the efficacy and tolerability of H pylori eradication in an omeprazole-based triple therapy with high and low dose of clarithromycin and amoxicillin. METHODS： One hundred and sixty H pylori positive patients were randomly assigned to two groups based on the following 2 wk investigation; （1） group A or low-dose regimen received omeprazole 20 mg b.i.d, clarithromycin 250 mg b.i.d and amoxicillin 500 mg b.i.d; and （2） group B or high-dose regimen received omeprazole 20 mg b.i.d, clarithromycin 500 mg b.i.d and amoxicillin 1000 mg b.i.d. During the study Hpylori status was assessed by histology and rapid urease test prior and by 13C-urea breath test 6 wk after the therapy. Standard questionnaires were administered to determine the compliance to treatment and possible adverse events of therapy. Data were subject to x^2 to compare the eradication rates in the two groups. The significant level of 95% （P ≤ 0.05） was considered statistically different. RESULTS： We found that the per-protocol eradication rate was 88% （68/77） in group A, and 89% （67/75） in group B. The intension-to-treat eradication rate was 85% （68/80） in group A and 83.75% （67180） in group B. Overall adverse events were 26% in group A and 31% in group B. The adverse events were generally mild in nature and tolerated well in both groups with a compliance of 98% in group A vs 96% in group B. CONCLUSION： The omeprazole-based low dose regimen of darithromycin and amoxicillin for two weeks in Hpylori eradication is as effective as high dose regimen in Iranian population.

Stability control of gate groups in deep wells

In order to study stability control methods for a deep gate group under complex stresses,we conducted field investigations and analyses of reasons for damage in the Xuzhou mining district.Three reasons are proposed:deep high stress,improper roadway layout and support technology.The stability control countermeasures of the gate group consist of an intensive design technology and responding bolt-mesh-anchor truss support technology.Our research method has been applied at the -1000 m level gate group in Qishan Coal Mine.Suitable countermeasures have been tested by field monitoring.

Milk Quality in Dual Purpose Cattle with Hand or Machine Milking

To evaluate and improve the milk quality in dual purpose cattle with hand or machine milking, a good management and sanitary program was implemented （GMSP） in 40 farms. Was obtained a diagnostic by an interview and in situ evaluation of management conditions and milk samples for laboratory analysis integrating the platform and microbiological counts, before and after of GMSP. The changes achieved were no significant （P 〉 0.05） for pH and density, but alcohol and foreign material were positive modified （P 〈 0.05） by GMSP in both hand and machine milking. The quantities of sediments were decreased （P 〈 0.05） in more than 50.0%. Decrease （P 〈 0.05） was observed in the counts of CFU mL1 （colony forming unitsl） in aerobic mesophilic, coliforms, Salmonella ssp. and Staphylococcus aureus with the GMSP. After GMSP Salmonella ssp. incidence was affected （P 〈 0.05） by hand （55.5%） vs. machine （61.5%） milking type; coliforms count and positive incidence in milk were affected （P 〈 0.05） in hand （81.5%） vs. machine （53.9%）. Therefore it was confirmed that the implementation of adequate sanitary and management practices, in both hand and machine milking, decreased the presence and incidence of microorganisms in milk with potential to produce disease in animals and humans.

Number and distribution of Black-necked Cranes wintering in Zhigatse Prefecture,Tibet

We surveyed all known wintering areas of the Black-necked Crane (Grus nigricollis) in Zhigatse Prefecture of the Tibet Autonomous Region during three winters.Our surveys confirm that Zhigatse Prefecture is the most important wintering area for the species,accounting in some years for as much as 39％ of the estimated world population.Counts ranged from a high of 4240 cranes in January 2007 to a low of 2636 in February 2009.Chick recruitment (chicks/100 cranes) ranged from 8.2 (January 2010) to 11.3 (January 2007).The highest concentration of cranes during all three surveys occurred on the 60 km stretch of the Yarlung Tsangpo (River) between Lhaze and Phuntsoling.To evaluate potential impacts of the Xietongmen Copper Mine,we monitored wintering crane numbers prior to mine installation in an intensive study area located between the Shab Chu Valley and the city of Zhigatse.Our surveys recorded on average 820 ± 83 cranes (SE; n =8) in this area.With the installation of the mine at a location ～50 km west of Zhigatse,increased traffic and development on the north side of the Yarlung River will likely result in a shift in crane distribution away from the north side,to nearby suitable habitats.Based on our survey results,we recommend three areas hosting high numbers of cranes in the vicinity of the mine be added to the Yarlung Tsangpo Middle Reaches Black- necked Crane Nature Reserve.These areas are Nierixiong and Jiaqingze Villages in Nierixiong Xiang and the Shab Chu Valley.

山东省石炭－二叠－三叠纪岩石地层清理意见

重新厘定的山东省石炭－二叠－三叠纪岩石地层分为二个群、七个组、五个正式段。下部的含煤岩系为月门沟群，时代为晚石炭世－早二叠世，包括本溪组、太原组和山西组，本溪组底部的铁铝岩系为湖田段；中部一套杂色地层，以黄绿、灰绿、紫色砂、页岩为主，基本不含煤层，为石盒子组，时代为早二叠世－晚二叠世，分为黑山段、万山段、奎山段和孝妇河段；上部一套基本不含植物化石的红色地层，主要以砂岩为主，夹泥岩，为石千峰群，分为孙家沟组和刘家沟组，时代为三叠纪。

Sea Level Variation at Western Coast of Mexican Pacific in Response to Tsunamigenic Earthquakes （2012-2015）

Tsunamis in Mexico are a real threat, still unknown to many, mainly by people living in or visiting the coast. The Tsunami Warning Center in Mexico recently created （September 19, 2011） monitors earthquakes and sea level change caused by these same. Sea level on the west coast of the Mexican Pacific was analyzed after the occurrence of local, regional and distant earthquakes, in order to determine the existence of an anomaly due to the quake itself. Variations in sea level due to local registered earthquakes Mw 6.0 to 7.4 range was from 0.10 to 0.30 m; for regional earthquakes of Mw 7.3 and 8.2 were 0.12 and 0.22 m respectively and to the distant earthquake of Mw 8.0 recorded in Solomon Islands, the change in sea level of the maximum recorded was 0.20 m in Manzanillo, Colima. It is important to know that earthquakes whether local, regional or distant whose magnitudes are in the range specified here, did not present a risk to the Mexican coast, but do not rely, having to monitor variations in sea level that earthquakes can produce and be aware that you may perhaps occur as a tsunami in Indonesia in 2004 or Japan in 2011.

Bacterial flora concurrent with Helicobacter pylori in the stomach of patients with upper gastrointestinal diseases

AIM： To investigate the non-He/icobacterpy/ori （H. pylori） bacterial flora concurrent with H. pylori infection.METHODS： A total of 103 gastric biopsy specimens from H. pylori positive patients were selected for bacterial culture. All the non-H, pylori bacterial isolates were identified by matrix assisted laser desorption ionization time-of-flight mass spectrometry （MALDI-TOF MS）.RESULTS： A total of 201 non-H, pyiori bacterial isolates were cultivated from 67 （65.0%） of the 103 gastric samples, including 153 isolates identified successfully at species level and 48 at genus level by MALDI-TOF MS. The dominant species were Streptococcus, Neisseria, Rothla and Staphylococcus, which differed fromthe predominantly acid resistant species reported previously in healthy volunteers. The prevalence of non-H. pylori bacteria was higher in non-ulcer dyspepsia group than in gastric ulcer group （100% vs 42.9%, P 〈 0.001）. Six bacterial species with urease activity （Staphylococcus epidermidis, Staphylococcus warneri, Staphylococcus capitis, Staphylococcus aureus, Brevibacteriurn spp. and Klebsiella pneumoniae） were also isolated.CONCLUSION： There is a high prevalence of the non-H, pylori bacteria concurrent with H. pylori infection, and the non-H, pylori bacteria may also play important as-yet-undiscovered roles in the pathogenesis of stomach disorders.

Decentralisation： New Values and New Rights

The aim of this paper is to challenge the traditional or standard view of the current processes of decentralisation within institutions and administrations, in order to reconstruct the dynamic of such processes in terms of new values and new rights. Therefore, this paper censures the ＂reductionist＂ vision of decentralisation that envisages it merely as an administrative and institutional event and, in contrast, develops a concept of decentralisation as a social, political, and legal process linked to new constitutional values and new fundamental rights, whereby, it might be included within the sphere of a general theory of rights and take on an important role within this area. This work vindicates the idea that contemporary decentralization must form a part of the historical processes of the generalisation and specification of rights where in the goal is the fulfilment of the following maxim： rights for all and not merely for a few. To achieve this goal, decentralisation can incorporate the instrument of ＂positive discrimination＂ as a ＂strategy for equality＂, which can employ to create ＂specific rights＂ aims primarily at the members of the most vulnerable groups.

Changes of Wage Structures in Chinese Public and Private Sectors： 1995-2007

Using CHIP （Chinese Household Income Project Survey） data and the sample selection bias corrected wage function model, this paper estimated changes in wage structure in China by ownership types （SOEs, COEs, FEs, and PEs） in 1995 and 2007. The major conclusions are as follows. First, effects of education on wage levels in SOEs and FEs become greater, while education effects decrease in SOEs and PEs under economic transition periods; firm-specific human capital becomes more important in the wage determination mechanism along with market-oriented reforms in SOEs, PEs, and FEs; age effect decreases in SOEs and COEs, but it becomes greater in PEs and FEs. Second, there exist wage structure differences between sectors by wage distributions. For example, in 2007, in SOEs, education return rates are higher for the low-wage and middle-wage groups, and the effect is the highest at the 40th percentile. However in COEs and FEs, education return rates are higher for the high-wage groups, and the effect is the highest at the 70th percentile in COEs and at the 70th percentile in FEs. Tenure effects are greater in the middle-wage groups （40th-80th） in SOEs, COEs, and FEs, and age effects are greater in the low-wage groups （5th-30th） in SOEs, FEs, and PEs.

Seasonal variations of group-specific phytoplankton cell death in Xiamen Bay, China

The importance of phytoplankton cell death is being increasingly recognized, however, there are still no published reports on this in Xiamen Bay. In this study, the proportion of dead phytoplankton cells associated with environmental factors was assessed at a station in Xiamen Bay from December 2012 to December 2013, using a cell digestion assay, which is an effective method to analyze dead/ living ceils in complex natural phytoplankton communities. The percentages of dead cells （% DC） in the total phytoplankton in summer （16%＋6%） were lower than those in winter （27%q-16%）. Six groups of phytoplankton （G1-G6） were categorized by flow cytometry. These phytoplankton communities with diverse seasonal variations in % DC had different responses to environmental constraints. The main factors affecting mortality were temperature and salinity, while nutrient concentration showed little influence on phytoplankton death. Additio^aally, our results provide evidence that chlorophyll a concentrations had an inverse relationship with total phytoplankton % DC and viable cell abundance was more meaningful than total cells to explain variations in environmental parameters （such as Chl a）. Moreover, the lowest mean % DC in total phytoplankton was 16%q-6% at our sample site, which is in a subtropical area with high water temperatures, full solar radiation, and rich nutrients. This indicates that phytoplankton cell death is a process that cannot be ignored. In summary, phytoplankton cell death is important in understanding the dynamics of phytoplankton communities and the fimctioning of subtropical ecosystems.

Nitrogen and phosphorus intake by phytoplankton in the Xiamen Bay

This paper describes a time series experiment examining the nitrogen and phosphorus intake of natural phytoplankton communities by a microcosms approach.Seawater samples containing natural phytoplankton communities were collected from waters around Baozhu Islet in inner Xiamen Bay and around Qingyu Islet in the outer bay.The goal was to elucidate the relationship between phytoplankton population enhancement,the biological removal of nitrogen and phosphorus from the seawater,and the phytoplankton nitrogen and phosphorus intake ratio based on nitrogen and phosphorus removal from seawater by phytoplankton,to provide a basis for detecting prewarning conditions for red tide and the assessment of red tide events.Two key results were obtained:1.During the experiment,the nitrogen and phosphorus seawater concentrations in samples from these two sites were negatively and closely correlated to the logarithm of the phytoplankton cell concentration and to the value of the apparent oxygen increment.The ratio of the intake coefficients was 3.5:1 for phosphorus and 1.1:1 for nitrogen for the phytoplankton between these samples from around Baozhu Islet and Qingyu Islet,respectively.This indicates that the intake capabilities of phytoplankton for nitrogen in the two waters are essentially identical.However,for phosphorus,the capability was much higher in the Baozhu Islet waters than the Qingyu Islet waters.In other words,the phytoplankton in Qingyu Islet waters produced more biomass while consuming the same amount of phosphorus as the other waters;2.The phytoplankton nitrogen and phosphorus intake ratio from the Baozhu Islet and Qingyu Islet waters was 20:1 and 36:1,respectively.The latter waters had a significantly higher ratio than the former and both were higher than the Redfield Ratio.These results indicate that nitrogen and phosphorus intake ratios by phytoplankton can vary significantly from region to region.