春江浩荡暂徘徊 又踏层峰望眼开

金中(主持人):面临着国庆长假的来临,节前一周的行情多少有点郁闷。上海单边的量能一下从之前的200亿左右水平萎缩至100亿左右水平,如此快的量能缩水,加上指数也不经意回落了近百点,不得不让人对这波行情捏上一把冷汗。 明枫(江恩理论家):从浪型结构划分角度来看,我们以沪综指的分时图为例,自1259点展开的五连阳呈现出清晰的五浪上攻结构,那么对于之后的调整我们应有迎接a-b-c三浪结构调整的心理准备,具体划分如下:1467点-1408点为a浪,1408点-1490点为b浪,1490-?为c浪。从结构上看,既然b浪创了阶段新高。

基于COSMIC掩星观测数据的NmF2全球分布特征研究

利用COSMIC掩星观测获得的电离层电子密度剖面数据,研究了2007-2011年的电离层F2层峰电子密度(NmF2)的全球分布特征。结果发现,赤道电离层异常因地方时和经度而变化,在LT11-LT14期间存在明显的沿经度变化的四峰结构。在北半球夏季夜间,北纬60°区域NmF2显著增强,即广义的威德尔海异常现象;在南半球夏季夜间,在威德尔海区域也出现了NmF2增强的现象。此外,与太阳活动低年相比,太阳活动增强期间的威德尔海异常区域的地理范围明显增大。

唐“商山路”考

《册府元龟》卷694载:“韦伦为商州刺史,兖、荆、襄等道租庸使,会襄州裨将康楚之、张嘉延拥众为叛,凶党万余人,自称东楚义王。襄州刺史王政弃城逃走,嘉延又南袭破江陵,汉沔馈运阻绝,朝廷旰食”。又《旧唐书。穆宁传》说:广德初,“河运不通,漕輓由汉沔至商山,达京师”。《全唐文》卷784《秘书监穆元堂志》也说:“于时周郑路塞。

向着香花畦

……直到那佳美的香花畦 潜意识中,我执著得近乎固执地以为,有一个幽花欣馨恬淡的园子,牵动我的心扉,我向往那美地——是我小心翼翼编织的梦。 孤帆远影的苍凉也未泯灭那本能似的梦想,我在别人以为我神经质的嘲笑中仍然相信,层峰叠翠的山那边,仿佛一支洞箫在吹,在呼唤我,悠扬牵心。 一次相邀挚友徜徉于深山幽谷边,我伤感地说:“我一定在找什么东西,好像一个人在泣血带泪地呼唤我。”静静坐在大石上的她,凝望着远方说:“也许,我们会很无奈很无奈地活到老!”溪水边,她满脸迷惘,我满腹忧伤。

Resistance of cavitation erosion of multimodal WC-12Co coatings sprayed by HVOF

Conventional,submicron and multimodal WC-12Co cermet coatings were deposited by high velocity oxy-fuel（HVOF）.The microhardness and microstructure of the coatings were compared,and the resistance of the coatings to cavitation erosion was studied by ultrasonic vibration cavitation equipment.Cavitation pits and craters were observed by SEM and cavitation mechanisms were explored.The results show that the microstructures of submicron and multimodal WC-12Co coatings prepared by HVOF are dense with little porosity,and their microhardness values are obviously higher than that of the conventional WC-12Co coating.The average microhardness of multimodal WC-12Co coating reaches nearly HV1500,which is much higher than that of the conventional one.As well,it is found that the multimodal WC-12Co coating exhibits the best cavitation erosion resistance among the three coatings,the erosion rate is approximately 40% that of the conventional coating,and the cavitation erosion resistance of multimodal WC-12Co coating is enhanced by above 150% in comparison with the conventional coating.

七律和周世钊同志

春江浩荡暂徘徊,又踏层峰望眼开。风起绿洲吹浪去,雨从青野上山来。尊前谈笑人依旧,城外鸡虫事可哀。莫叹韶华容易逝,卅年仍到赫曦台。这首诗抄录于一九五五年十月四日致周世钊的信中,随信最早发表在人民出版社一九八三年十二月版《毛泽东书信选集》。

毛泽东诗七首

云开衡岳积阴止,天马凤凰春树里.年少峥嵘屈贾才,山川奇气曾钟此.

Seismic response of tunnel under normal fault slips by shaking table test technique

Mountain tunnel crossing a normal fault in seismically active zone is easily affected by normal fault slip and earthquake. It is necessary to study tunnel dynamic response under action of normal fault slip and earthquake. In this paper, a three-dimensional normal fault sliding device was designed, and a shaking table test was carried out to study tunnel seismic performance under normal fault slip. The results show that peak acceleration of lining is dominated by an existence of fault and direction of seismic excitation, not normal fault slip. And the incremental strains of lining in critical zone with 1.7 times fault thickness and centered in faults induced by normal fault slip and seismic excitation are larger than ones only by seismic excitation. And the incremental strains in critical zone increase with the increase of normal fault slip magnitude ranging from 0 to 2 mm. And normal fault slip results in a significant reduction of overall tunnel stiffness subjected to an earthquake. These experimental results provide a scientific reference for prevention and control measurement of tunnel damage under earthquake and normal fault slip.

Size effect of confined concrete subjected to axial compression

In order to investigate the size effect and other effects on the stress-strain relationship of confined concrete, 42 specimens with different sizes and section shapes were placed under axial compression loading. Effects of key parameters such as size of specimens, tie configuration, transverse reinforcement ratio, and concrete cover were studied. The results show that for specimens with the same configuration and the same volumetric ratio of the transverse reinforcement, along with the increasing specimen size, the peak stress, peak strain and deformation of the post-peak show a down trend, however, the volumetric ratio of the transverse reinforcement is lowered, the decreasing of the peak stress is accelerated, but the decreasing of the deformation is slow down. For specimens with the same volumetric ratio but different configurations of transverse reinforcement, though the transverse reinforcement configuration becomes more complicated, the peak stress of the large size specimen does not improve more than that of the small size. However, the deformation occurs before the stress declines to 85% of peak stress, and the improvement with the grid pattern tie configuration is much greater due to size effect.

Strata behavior investigation for high-intensity mining in the water-rich coal seam

This paper describes a specific case of mining in a water-rich coal seam in western China. Water inrushes,roof caving and other disasters induced by intensive mining operation could pose great threats to the safety of coal mines. The strata behavior during the high-intensity extraction in the water-rich coal seam is analyzed by employing the numerical simulation method and in situ monitoring. The results show that about 10 m ahead of the workface, the front abutment pressure peaks is at 34.13 MPa, while the peak of the side abutment pressure is located about 8 m away from the gateway with the value of 12.41 MPa; the height of the fracture zone, the first weighting step and the cycle weighting step are calculated to be 45,50 and 20.8 m, respectively; pressure distribution in the workface is characterized by that the vertical pressure in the center occurs earlier and is stronger than those on both ends. Then, the results above are verified by in situ measurement, which may provide a basis for safe mining under similar conditions.

Simultaneous Prediction of Retention Times and Peak Shapes of Sulfonamides in Reversed-Phase High-Performance Liquid Chromatography

In this paper, we propose a novelmethod based on the plate theory to simultaneously predict retention times and peak shapes under gradient elutions and different flow rates by reversed-phase high-performance liquid chromatography. The proposed method yielded excellent retention prediction results in experiments with 16 common sulfonamides under 18 gradient conditions and four different flow rates, including 0.7, 1.0, 1.3, and 1.5 mL/min. The mean absolute deviation was 0.70%, which indicates accurate prediction. Moreover, the proposed method predicts the change wellin peak shapes caused by the expansion or compression ofpeaks under different gradient conditions.

Model building for Chang-8 low permeability sandstone reservoir in the Yanchang formation of the Xifeng oil field

In order to build a model for the Chang-8 low permeability sandstone reservoir in the Yanchang formation of the Xifeng oil field,we studied sedimentation and diagenesis of sandstone and analyzed major factors controlling this low permeability reservoir.By doing so,we have made clear that the spatial distribution of reservoir attribute parameters is controlled by the spatial distribution of various kinds of sandstone bodies.By taking advantage of many coring wells and high quality logging data,we used regression analysis for a single well with geological conditions as constraints,to build the interpretation model for logging data and to calculate attribute parameters for a single well,which ensured accuracy of the 1-D vertical model.On this basis,we built a litho-facies model to replace the sedimentary facies model.In addition,we also built a porosity model by using a sequential Gaussian simulation with the lithofacies model as the constraint.In the end,we built a permeability model by using Markov-Bayes simula-tion,with the porosity attribute as the covariate.The results show that the permeability model reflects very well the relative differences between low permeability values,which is of great importance for locating high permeability zones and forecasting zones favorable for exploration and exploitation.

DEFORMATION CHARACTERISTICS AND ESR DATING OF ANHUA-XUPU FAULT BELT IN THE XUEFENG MOUNATAINS, HUNAN

Anhua-Xupu fault belt plays a very important role in the formation of Xuefeng Mountains. The fault belt shows an arc-structure extruding towards NW. Fault rocks, microstructures and homogeneous temperature (concentrated around 160℃) of fluid inclusions in the quartz veins shows that the fault belt mainly underwent shallow brittle deformation and the highest-grade dynamic metamorphic rock is mylonitized sericite phyllite. The ESR (Electron Spin Resonance) dating from the quartz veins in the fault rocks shows that the fault belt underwent two intense fluid movement stages at Yanshanian (156.9~136.2Ma, 119.8~90.6Ma); moreover not only the occurrence and microstructures but also the homogeneous temperature of the quartz veins developed in that two stages show obvious diversity, which can prove that there exists the reversion period of Mesozoic extension and compression movement of Xuefeng mountains between these two stages .

Thin-bed thickness calculation formula and its approximation using peak frequency

Quantitative thickness estimation below tuning thickness is a great challenge in seismic exploration. Most studies focus on the thin-beds whose top and bottom reflection coefficients are of equal magnitude and opposite polarity. There is no systematic research on the other thin-bed types. In this article, all of the thin-beds are classified into four types： thin-beds with equal magnitude and opposite polarity, thin-beds with unequal magnitude and opposite polarity, thin-beds with equal magnitude and identical polarity, and thin-beds with unequal magnitude and identical polarity. By analytical study, an equation describing the general relationship between seismic peak frequency and thin-bed thickness was derived which shows there is a Complex implicit non-linear relationship between them and which is difficult to use in practice. In order to solve this problem, we simplify the relationship by Taylor expansion and discuss the precision of the approximation formulae with different orders for the four types of thin-beds. Compared with the traditional amplitude method for thin-bed thickness calculation, the method we present has a higher precision and isn＇t influenced by the absolute value of top or bottom reflection coefficient, so it is convenient for use in practice.

The Structural Behavior of Low/Medium/High Rise Concrete Office Buildings in Kuwait

The main concern of this paper is to provide an extensive study for the structural behavior of low/medium/high rise office buildings aiming to deepen structure and architect designers understanding for such type of buildings. The study is performed on reinforced concrete and emphasized only on Kuwait city conditions for wind. Regular layout plan building with different heights ranging from five to fifty typical office stories are investigated in this study. Three dimensional finite element techniques through ETABS software are used in conducting analysis for structures presented here-in. A serviceability study is performed to ensure that buildings have sufficient stability to limit lateral drift and peak acceleration within the acceptable range of occupancy comfort. In addition, an ultimate strength study is carried out to design and verify that all the structural elements are designed to withstand factored gravity and lateral loadings in a safe manner according to the international building codes. The building slenderness ratio and the building core size and location are the studied parameters since they are the key drivers for the efficient structural design. Analysis results are presented and discussed and finally conclusions are summarized as guidelines for designers of concrete office buildings in Kuwait.

Human Comfort Evaluation of a Steel-Concrete Composite Building Subjected to Aerobics

The current steel-concrete composite floors design might be susceptible to the resonance phenomenon, causing undesirable vibrations in the frequency range that is the most noticeable to humans, i.e., 4 Hz to 8 Hz. This way, the main objective of this work is to investigate the dynamic structural behaviour of a steel-concrete composite multi-storey building when subjected to human rhythmic activities （aerobics）. The studied structural model represents a typical interior floor bay of a commercial building used for gym and is composed by three floor levels spanning 20 m by 20 m, with a total area of 3×400 m2. An extensive parametric study was developed aiming to obtain the peak accelerations, RMS （root mean square） accelerations and VDV （vibration dose value） values, based on two different mathematical formulations. The human comfort of the building was analysed and the vibration transmissibility related to the steel columns was verified. Based on the found results, the investigated structural model presented high vibration levels that compromise the human comfort.

Effect of Heterogeneities in Soil on Spatial Variation of Peak Ground Acceleration

In the proximity of an active fault, spatial variation of peak ground motion is significantly affected by the faulting mechanism. It has been observed that near fault ground motions consists of different characteristics compared to the far fault ground motions. Near fault records, in the distance range of less than 100 m from the faults are not available except for few cases. Therefore numerical simulation of ground motions for such near-fault situations is necessary. In addition to the understanding of the phenomenon of near fault ground motion there is a need to enhance our understanding of the possible potential hazard that can be caused due to the future rupture activity by understanding the phenomenon of surface faulting. In this paper we propose numerical simulation based on discrete modeling to investigate the fault rupture propagation and its effect on the surface peak ground acceleration. In the present two dimensional study rupture propagation due to bedrock motion has been observed for different shear wave velocity. A model of size 1000× 150 m is selected for this purpose. It has been observed that as the stiffness of the media is decreasing, the affected surface is decreasing and also width of the shear crack zone is decreasing. Secondly, we attempted to study the ground motion on the surface due to the bedrock motion in presence of boulders in the soil media by keeping the boulder at different positions. We find that there is an increase in the shear zone as well as the PGA on the surface when the boulder is present on the foot wall and in the vicinity of the rupture zone. Finally, we performed the analysis using layered media and studied the affect of crack propagation and also the variation of peak accelerations. Findings from the study can be utilized to assess the damage potential of the near fault areas.

满族赋

华夏神龙舞,盛世万民和。九州群星灿,我为满族歌。夫满族者,起于东荒。故地千里,天高地广。不咸十六峰~①,弘恢千仞,雄伟险象,世尊神山,登高祭望。~②兴安三百岭,逶迤层峰,延绵叠嶂,代以薪传,地老族昌。皑皑白雪,周天寒彻;茫茫林海,春风浩荡。黑水奔流,镜泊荡漾,风醇物美,万顷渺旷。紫气东来,启运鸿蒙。统绪绵远,奕世传承。~③下凡神女,吃红果生为族祖;布勒湖畔,滋绿草是为肇兴。~④江河尘烟,经几度分合消长;岁月风霜,阅多少世道纷争。