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| 1 | Laboratory Simulation of Vertical Hydrocarbon Microseepage显示文摘基于烃 microseepage 的一个概念的模型,当模仿的 caprock 和它的 overlying 阶层首先被设置模仿烃 microseepage 和它的近表面的表情的过程,一台宏大小的试验性的设备使用了水泥和石英沙的匹配的混合物。模拟实验的结果建议那模仿的 caprock,它的 overlying 阶层有某个封上的能力;烃 microseepage 被点气体来源的压力统治,并且温度起仅仅一个辅助作用;在烃 microseepage 的路径上,烃集中的分发是扇形的;由模仿的 caprock 和它的 overlying 阶层的链烷的微分吸附导致色析法的效果的出现。在模仿的 caprock 以内的不同移居模式被 i 钢瓶煤气的比率显示出到 n 钢瓶煤气。在表面土壤的烃的集中与点气体来源的压力有好通讯。这些模拟结果是重要的推进在表面地球化学探索恢复的异例的机制的学习。 | WANG Guojian CHENG Tongjin FAN Ming REN Chun CHEN Weijun | 2011 | Acta Geologica Sinica(English Edition)2011，85，1： | 7 |
| 2 | Role of yttrium in glass formation of Ti-based bulk metallic glasses显示文摘Starting with Zr of two different purities, Ti-based bulk metallic glasses (BMGs) with a nominal composition of Ti40Zr25Cu12Ni3Be20 were prepared. The effect of the addition of yttrium at levels of 0.2 at.%, 0.4 at.%, 0.5 at.%, 0.6 at.%, and 1 at.% on the glass forming ability (GFA) of the alloy has been investigated by means of metallography, X-ray diffraction, and differential scanning calorimetry. Experimental data in-dicates that high impurity content dramatically reduces the glass forming ability. Microalloying with 0.5 at.% Y is effective in suppressing the crystalline phase formation and alleviating the detrimental effect of oxygen in the low-purity alloy. On the contrary, in the alloy contain-ing high-purity element, the effective yttrium addition is less than 0.4 at.%. The results indicate that the beneficial effect of the optimum dopants is mainly due to scavenging the oxygen impurity via the formation of innocuous phase. | HAO Guojian REN Fei ZHANG Yong LIN Junpin | 2009 | Rare Metals2009，28，1： | 4 |
| 3 | Constrained Consensus of Continuous-Time Heterogeneous Multi-Agent Networks with Nonconvex Constraints and Delays显示文摘This paper studies the continuous-time constrained consensus of heterogeneous multi-agent networks with nonconvex input and velocity constraints,where each agent’s dynamic is modeled by a first-order or second-order integrator,the communication delays are assumed to be time-varying,nonuniform,bounded and the communication graph is changing over time.An improved distributed control algorithm with time-varying gains is proposed and the heterogeneous consensus is changed into the homogeneous consensus by a coordination transformation.Then,it is proved that the constrained consensus can be reached by analyzing six connection cases between agents if the joint graph has a directed spanning tree over each bounded interval.Finally,simulations are done to show the correctness of the theorem. | MO Lipo YU Yongguang REN Guojian YUAN Xiaolin | 2022 | Journal of Systems Science & Complexity2022，35，1： | 1 |
| 4 | A class of anomalous diffusion epidemic models based on CTRW and distributed delay显示文摘In recent years,the epidemic model with anomalous diffusion has gained popularity in the literature.However,when introducing anomalous diffusion into epidemic models,they frequently lack physical explanation,in contrast to the traditional reaction-diffusion epidemic models.The point of this paper is to guarantee that anomalous diffusion systems on infectious disease spreading remain physically reasonable.Specifically,based on the continuous-time random walk(CTRW),starting from two stochastic processes of the waiting time and the step length,time-fractional space-fractional diffusion,timefractional reaction-diffusion and fractional-order diffusion can all be naturally introduced into the SIR(S:susceptible,I:infectious and R:recovered)epidemic models,respectively.The three models mentioned above can also be applied to create SIR epidemic models with generalized distributed time delays.Distributed time delay systems can also be reduced to existing models,such as the standard SIR model,the fractional infectivity model and others,within the proper bounds.Meanwhile,as an application of the above stochastic modeling method,the physical meaning of anomalous diffusion is also considered by taking the SEIR(E:exposed)epidemic model as an example.Similar methods can be used to build other types of epidemic models,including SIVRS(V:vaccine),SIQRS(Q:quarantined)and others.Finally,this paper describes the transmission of infectious disease in space using the real data of COVID-19. | Zhenzhen Lu Guojian Ren Yangquan Chen Xiangyun Meng Yongguang Yu | 2023 | International Journal of Biomathematics2023，16，7： | 0 |
| 5 | Syntheses, structures and magnetic properties of Fe_6 and Fe_(12) ferric wheels显示文摘Starting from the same Fe3O(RCO2)6 complex and using a similar synthesis strategy, the Fe6 and Fe12 wheels were obtained by utilizing two designed ligands, 2-amino-2-methyl-1,3-propanediol(L1) and 1,3-propanediol(L2), respectively. A biological buffer reagent, Bis-Tris(2-[bis-(2-hydroxyethyl)amino]-2-(hydroxymethyl)propane-1,3-diol) was first introduced in the synthesis of the Fe12 wheel, playing a vital role in adjusting the acidity of reaction environment. Magnetic studies on both Fe6 and Fe12 wheels revealed strong antiferromagnetic coupling between the spins on FeIII ions. | Guojian Ren Yanqing Liu Zhenxin Zhao Suijun Liu Songde Han Jian Xu Xianhe Bu | 2015 | Science China(Information Sciences)2015，58，12： | 0 |
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