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Carbonate cementation-dissolution in deep-seated sandstones near the overpressure top in central Junggar Basin, Xinjiang, NW China

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Chinese Journal Of Geochemistry 2009年第1期28卷 86-96页

作者： he sheng Faculty of Earth Resources China University of Geosciences Wuhan 430074 China Key Laboratory of Tectonics and Petroleum Resources （China University of Geoscienees Wuhan） Ministry of Education Wuhan 430074 China

Fluid/rock interaction occurs frequently in the sandstones near the overpressure top in central Junggar Basin, and carbonate cementation-dissolution is related closely to the formation of secondary pores in the reservoir sandstones. From petrological, hydrochemical and fluid-inclusion studies of the deep-seated sandstones near the overpressure top in central Junggar Basin and the carbon and oxygen isotopic characteristics of carbonate cements in those sandstones, the following conclusions can be drawn: (1) Carbonates are the major cements. Two-stage cementation was commonly developed, with late-stage ferroan carbonate cementation being dominant; several secondary porosity zones were developed vertically in the sandstones near the overpressure top, and there is a mutually compensatory relationship between the carbonate contents and the mean porosity; (2) the alkalescent formation-water chemical environments are in favor of carbonate precipitation; (3) there were two phases of thermal fluid activity which are related to the late-stage carbonate cementation-dissolution; (4) with the overpressure top as the boundary, carbonate cements in the sandstones have slightly negative δ13C and δ18O values, showing such a variation trend that the δ13C and δ18O values near the coal-bearing Jurassic strata are lighter, those in the overpressure top are heavier, and those at the upper part of the overpressure top are lighter, which is considered to be the result of kinetic isotope fractionation driven by episodically overpressured fluid flow; (5) carbonate cementation is closely associated with the decarboxylation of organic acids, and secondary porosity zones resultant from dissolution by organic acids and CO2 derived from Jurassic coal-bearing strata, are the most important reservoir space of hydrocarbon, Studies of the mechanisms of carbonate cementation-dissolution and formation of secondary pores in the deep-seated sandstones near the overpressure top are of great significance b

关键词：准噶尔盆地中部原油地球化学特征生源构成

PPA-Like Contraction Methods for Convex Optimization:A Framework Using Variational Inequality Approach

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Journal of the Operations Research Society of China 2015年第4期3卷 391-420页

作者： Bing-sheng he Department of Mathematics Nanjing UniversityNanjing 210093China

Linearly constrained convex optimization has many *** first-order optimal condition of the linearly constrained convex optimization is a monotone variational inequality(VI).For solving VI,the proximal point algorithm(PPA)in Euclideannorm is classical but ***,the classical PPA only plays an important theoretical role and it is rarely used in the practical scientific *** this paper,we give a review on the recently developed customized PPA in Hnorm(H is a positive definite matrix).In the frame of customized PPA,it is easy to construct the contraction-type methods for convex optimization with different linear *** each iteration of the proposed methods,we need only to solve the proximal subproblems which have the closed form solutions or can be efficiently solved up to a high *** novel applications and numerical experiments are ***,the original primaldual hybrid gradient method is modified to a convergent algorithm by using a prediction-correction uniform *** the variational inequality approach,the contractive convergence and convergence rate proofs of the framework are more general and quite simple.

关键词： Linearly constrained convex optimization Variational inequality Proximal point algorithm

Interaction Between Conscious and Unconscious Information-Processing of Faces and Words

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Neuroscience Bulletin 2021年第11期37卷 1583-1594页

作者： Shiwen Ren Hanyu Shao sheng he State Key Laboratory of Brain and Cognitive Science Institute of BiophysicsChinese Academy of SciencesBeijing100101China University of Chinese Academy of Sciences Beijing100049China CAS Center for Excellence in Brain Science and Intelligence Technology Sahnghai20031China Department of Psychology University of MinnesotaMinneapolis55455USA

It is widely acknowledged that holistic processing is a key characteristic of face *** holistic processing implies the automatic integration of face parts,it is unclear whether such processing requires the awareness of face ***,we investigated the interactions between visible face parts and face parts rendered invisible using continuous flash suppression(CFS).In the first experiment with the upper half-face visible and the lower half-face invisible,the results showed that perceived face identity was influenced by the invisible lower half-face,suggesting that integration occurs between the visible and invisible face parts,a variant of the“composite face effect”.In the second experiment,we investigated the influence of visible face parts on the processing of invisible face parts,as measured by the time it took for the invisible parts to break out from *** results showed a visible-to-invisible facilitation effect,that the aligned invisible face parts broke through CFS faster than when the visible and invisible face parts were *** eyes had a stronger influence on the invisible nose/mouth than the other way *** facilitation of processing from visible to invisible parts was also found when Chinese characters were used as *** results show that information integration occurs across the consciousness boundary.

关键词： Holistic processing Face Word Awareness Integration across conscious boundary

Potential Connection between the Australian Summer Monsoon Circulation and Summer Precipitation over Central China

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Atmospheric and Oceanic Science Letters 2015年第3期8卷 120-126页

作者： he sheng-Ping Climate Change Research Center Institute of Atmospheric Physics Chinese Academy of Sciences Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences

This study investigated the connection between the Australian summer monsoon(ASM) and summer precipitation over central China. It was found that,following a weaker-than-normal ASM, the East Asian summer monsoon and western North Pacific subtropical high tend to be stronger, yielding anomalous northward moisture to be transported from the western Pacific to central China. Besides, anomalous upwelling motion emerges over 30–37.5°N, along 110°E. Consequently,significant positive summer precipitation anomalies are located over central China. Further analysis indicated that the boreal winter sea surface temperature(SST) in the Indian Ocean and South China Sea shows positive anomalies in association with a weaker-than-normal ASM. The Indian Ocean warming in boreal winter could persist into the following summer because of its own long memory, emanating a baroclinic Kelvin wave into the Pacific that triggers suppressed convection and an anomalous anticyclone. Besides, the abnormal SST signal in the South China Sea develops eastward with time because of local air-sea interaction, causing summer SST warming in the western Pacific. The SST warming can further affect East Asian atmospheric circulation and precipitation through its impact on convection.

关键词： Australian summer monsoon East Asian summer monsoon precipitation

Asymmetry in the Arctic Oscillation Teleconnection with January Cold Extremes in Northeast China

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Atmospheric and Oceanic Science Letters 2015年第6期8卷 386-391页

作者： he sheng-Ping Climate Change Research Center Chinese Academy of Sciences Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences

The connection of the Arctic Oscillation(AO)with the frequency of temperature extremes over East Asia during boreal winter has been documented by many *** study describes an asymmetry in the relationship between the January AO and the simultaneous cold extremes in Northeast China(NEC),and further reveals a breakdown of this *** is demonstrated that the frequency of January cold extremes in NEC shows significant(insignificant)negative correlation with the simultaneous negative(positive)phase of the *** possible explanation for such an asymmetry is that the Arctic center of negative AO extends more southwards to Siberia compared with that of positive AO,conducive to a closer connection with the frequency of an extreme Siberian *** a result,the frequency of January cold extremes in NEC shows a more significant relationship with the negative *** other related explanation is that,concurrent with the negative phase of the AO,there is an evident meridional stationary planetary wave in the upper troposphere around(30°N,100–300 hP a),which disappears in the positive ***,the negative AO could better reflect the fluctuation of the subtropical westerly wind and the synoptic-scale transient wave activity,which is closely related to the frequency of cold extremes in *** with a positive polarity of the AO trend since the mid-1980s,the connection between the cold extremes over NEC and the AO during January has been weakened.

关键词： Arctic Oscillation temperature extremes asymmetry

Zeolite powder addition to improve the performance of submerged gravitation-filtration membrane bioreactor

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Journal of Environmental Sciences 2006年第2期18卷 242-247页

作者： he sheng-bing XUE Gang KONG Hai-nan School of Environmental Science and Engineering Shanghai Jiaotong University Shanghai 200240 China School of Environmental Science and Engineering.Donghua University Shanghai 200051 China

In this study, the effect of zeolite powder addition on submerged membrane bioreactor （SMBR） on membrane permeability, and the removals for COD, NH3-N, TN were investigated. Through the parallel operation of control and test systems, it was found that the zeolite powder addition could alleviate the ultra-filtration membrane fouling and enhance the membrane permeability. On the basis of experimental investigations, a concept of ＂protection coating layer＂ was proposed to illustrate the phenomenon of UF membrane fouling. In addition, the removal for COD in test system was more stable, a little higher compared to the control system. Due to the combination of nitrification and ion exchange, a more excellent removal for NH3-N in test system was obtained regardless of influent NH3-N loading rate. It was also found that a mean 25% higher TN removal took place in the test system, and ion exchange and simultaneous nitrification and de-nitrification were analyzed to be main factors. During the stable operation period, the SOURs of test zeolite powder added sludge and control activated sludge were measured to be 75 mgO2/（gMLVSS, h） and 24 mgO2/（gMLVSS, h） respectively, it meant that the zeolite powder addition could enhance the microorganism activity significantly.

关键词： submerged gravitation-filtration membrane bioreactor performance zeolite powder membrane fouling microorganism activity

vSpec: workload-adaptive operating system specialization for virtual machines in cloud computing

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Science China(Information Sciences) 2016年第9期59卷 47-62页

作者： Xinkui ZHAO Jianwei YIN Zuoning CheN sheng he College of Computer Science Zhejiang University National Parallel Computing Engineering Research Center Jiangnan Institute of Computing Technology

In general, operating systems(OSs) are designed to mediate access to device hardware by applications. They process different kinds of system calls using an indiscriminate kernel with the same *** in cloud computing platforms are constructed from service components. Each of the service components is assigned separately to an individual virtual machine(VM), which leads to homogeneous system calls on each VM. In addition, the requirements for kernel function and configuration of system parameters from different VMs are different. Therefore, the suit-to-all design incurs an unnecessary performance overhead and restricts the OS’s processing capacity in cloud computing. In this paper, we propose an adaptive model for cloud computing to resolve the conflict between generality and performance. Our model adaptively specializes the OS of a VM according to the resource-consuming characteristics of workloads on the VM. We implement a prototype of the adaptive model, v Spec. There are five classes of VM: CPU-intensive, memory-intensive, I/O-intensive, networkintensive and compound, according to the resource-consuming characteristics of the workloads running on the VMs. v Spec specializes the OS of a VM according to the VM class. We perform comprehensive experiments to evaluate the effectiveness of v Spec on benchmarks and real-world applications.

关键词： workload classification operating system specialization workload-aware cloud computing v Spec system performance

Second post-Minkowskian order harmonic metric for a moving Kerr-Newman black hole

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Research in Astronomy and Astrophysics 2015年第5期15卷 646-650页

作者： Guan-sheng he Wen-Bin Lin School of Physical Science and Technology Southwest Jiaotong University

We apply the Lorentz boosting method to the Kerr-Newman metric in harmonic coordinates, and obtain the second post-Minkowskian order harmonic metric for a moving Kerr-Newman black hole with an arbitrary constant speed. This metric may be useful for investigating observable relativistic effects due to the motion of the moving source. As an application, the post-Newtonian equations of motion for a particle and a photon in the far field of this black hole are calculated.

关键词： black hole physics -- gravitation

Oxidation behavior of a novel multi-element alloyed Ti2AlNbbased alloy in temperature range of 650-850℃

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Rare Metals 2018年第10期37卷 838-845页

作者： Yong-sheng he Rui Hu Wen-Zhong Luo Tao he Xiang-Hong Liu State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an 710072 China Shaanxi Province Engineering Laboratory for Aerial Material Western Superconducting Technologies Co. Ltd Xi'an 710018China

The oxidation behavior of a novel multi-element alloyed Ti2A1Nb-based alloy （Ti-22Al-25Nb-1Mo-1V-1Zr-0.2Si） was studied in the temperature range of 650-850℃. X-ray diffraction （XRD） and scanning electron microscopy （SEM） equipped with an energy-dispersive spectroscopy （EDS） were used to identify the phase constituents and microstructure of the scales formed on the specimens after oxidation at different temperatures. Isothermal oxidation tests show that the oxidation rate of the alloyed TiEAlNb-based alloy is obviously reduced at all temperatures, and the mass gains are very low for this alloy in comparison with those of Ti-22Al-25Nb alloy. The alloying elements Mo, V, Zr and Si have an obvious affect on the oxidation products of the alloys. The improved oxidation resistance for the alloy is ascribed to the introduction of Mo, V, Zr and Si elements, which are beneficial to the selective oxidation of Al to form protective oxides while are disadvantage of the formation of poor oxidation resistance oxides such as AlNbO4.

关键词： Oxidation resistance Oxide scale Ti2AlNb- based alloy Alloying