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Growing construction and adaptive evolution of complex software systems

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Science China(Information Sciences) 2016年第5期59卷 5-7页

作者： Huaimin WANG bo ding National Key Laboratory of Parallel and Distributed Processing College of ComputerNational University of Defense Technology

Distributed software systems are becoming more and more complex *** is easy to find a huge amount of computing nodes in a nationwide or global information *** example,We Chat(Wei Xin),a well-known mobile application in China,has reached a record of 650 million monthly active users in the third quarter of *** the same time,researchers are starting to talk about software systems which have billions of lines of codes[1]or can last one hundred years.

关键词： Growing construction and adaptive evolution of complex software systems

Robo Cloud: augmenting robotic visions for open environment modeling using Internet knowledge

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Science China(Information Sciences) 2018年第5期61卷 19-34页

作者： Yiying LI Huaimin WANG bo ding Wei ZHOU College of Computer National University of Defense Technology

Modeling an open environment that contains unpredictable objects is a challenging problem in the field of robotics. In traditional approaches, when a robot encounters an unknown object, a mistake will inevitably be added to the robot's environmental model, severely constraining the robot's autonomy,and possibly leading to disastrous consequences in certain settings. The abundant knowledge accumulated on the Internet has the potential to remedy the uncertainties that result from encountering with unknown objects. However, robotic applications generally pay considerable attention to quality of service(Qo S).For this reason, directly accessing the Internet, which can be unpredictable, is generally not *** Cloud is proposed as a novel approach to environment modeling that takes advantage of the Internet without sacrificing the critical properties of Qo S. Robo Cloud is a "mission cloud–public cloud" layered cloud organization model in which the mission cloud provides Qo S-available environment modeling capability with built-in prior knowledge while the public cloud is the existing services provided by the Internet. The "cloud phase transition" mechanism seeks help from the public cloud only when a request is outside the knowledge of the mission cloud and the Qo S cost is acceptable. We have adopted semantic mapping, a typical robotic environment modeling task, to illustrate and substantiate our approach and key mechanism. Experiments using open 2 D and 3 D datasets with real robots have demonstrated that Robo Cloud is able to augment robotic visions for open environment modeling.

关键词： Internet-augmented environment modeling uncertainty robotic visions semantic mapping robotic software cloud robotics

Geminiviruses and their application in biotechnology

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Journal of Integrative Agriculture 2017年第12期16卷 2761-2771页

作者： YANG Qiu-ying ding bo ZHOU Xue-ping State Key Laboratory for Plant Diseases and Insect Pest Institute of Plant Protection Chinese Academy of Agricultural SciencesBeijing 100193 P.R.China

Being a major class of single-stranded DNA viruses, geminiviruses are mostly studied due to their catastrophic infectious effect on crops. These DNA viruses are characteristic for their ability in quickly multiplying viral genetic materials without integrating into the genome of plants, which makes them ideal for developing viral vectors for plants bioengineering. Geminivirus-derived vectors can be classified into expression vectors and virus-induced gene silencing（VIGS） vectors. Details of the design, construction, application and improvements of these geminivirus vectors are summarized and discussed.

关键词： geminivirus virus-based vectors expression vectors VIGS vectors biotechnology

MABP: an optimal resource allocation approach in data center networks

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Science China(Information Sciences) 2014年第10期57卷 230-245页

作者： LI XiaoLing WANG HuaiMin ding bo LI XiaoYong National Key Laboratory for Parallel and Distributed Processing School of ComputerNational University of Defense Technology

In data center networks, resource allocation based on workload is an effective way to allocate the infrastructure resources to diverse cloud applications and satisfy the quality of service for the users, which refers to mapping a large number of workloads provided by cloud users/tenants to substrate network provided by cloud providers. Although the existing heuristic approaches are able to find a feasible solution, the quality of the solution is not guaranteed. Concerning this issue, based on the minimum mapping cost, this paper solves the resource allocation problem by modeling it as a distributed constraint optimization problem. Then an efficient approach is proposed to solve the resource allocation problem, aiming to find a feasible solution and ensuring the optimality of the solution. Finally, theoretical analysis and extensive experiments have demonstrated the effectiveness and efficiency of our proposed approach.

关键词： data center network resource allocation workload substrate network optimality distributed constraint optimization

The snowline in the protoplanetary disk and extrasolar planets

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Research in Astronomy and Astrophysics 2017年第8期17卷 13-22页

作者： Chun-Jian Liu Zhen Yao Wen-bo ding College of Mathematics and Physics Bohai University College of Science Liaoning University of Technology

We investigate the behavior of the snowline in a protoplanetary disk and the relationship between the radius of the snowline and properties of molecular cloud *** our disk model,we consider mass influx from the gravitational collapse of a molecular cloud core,irradiation from the central star,and thermal radiation from the ambient molecular cloud *** the protoplanetary disk evolves,the radius of the snowline increases first to a maximum value Rmax,and then decreases in the late stage of evolution of the protoplanetary *** value of Rmaxis dependent on the properties of molecular cloud cores(mass M;,angular velocity ω and temperature T;).Many previous works found that solid material tends to accumulate at the location of the snowline,which suggests that the snowline is the preferred location for giant planet *** these conclusions,we compare the values of R;with semimajor axes of giant planets in extrasolar systems,and find that Rmaxmay provide an upper limit for the locations of the formation of giant planets which are formed by the core accretion model.

关键词： snowline—planets and satellites formation—protoplanetary disks

Solving multi-scenario cardinality constrained optimization problems via multi-objective evolutionary algorithms

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Science China(Information Sciences) 2019年第9期62卷 73-90页

作者： Xing ZHOU Huaimin WANG Wei PENG bo ding Rui WANG College of Computer National University of Defense Technology College of Systems Engineering National University of Defense Technology

Cardinality constrained optimization problems(CCOPs) are fixed-size subset selection problems with applications in several fields. CCOPs comprising multiple scenarios, such as cardinality values that form an interval, can be defined as multi-scenario CCOPs(MSCCOPs). An MSCCOP is expected to optimize the objective value of each cardinality to support decision-making processes. When the computation is conducted using traditional optimization algorithms, an MSCCOP often requires several passes(algorithmic runs) to obtain all the(near-)optima, where each pass handles a specific cardinality. Such separate passes abandon most of the knowledge(including the potential superior solution structures) learned in one pass that can also be used to improve the results of other passes. By considering this situation, we propose a generic transformation strategy that can be referred to as the Mucard strategy, which converts an MSCCOP into a low-dimensional multi-objective optimization problem(MOP) to simultaneously obtain all the(near-)optima of the MSCCOP in a single algorithmic run. In essence, the Mucard strategy combines separate passes that deal with distinct variable spaces into a single pass, enabling knowledge reuse and knowledge interchange of each cardinality among genetic individuals. The performance of the Mucard strategy was demonstrated using two typical MSCCOPs. For a given number of evolved individuals, the Mucard strategy improved the accuracy of the obtained solutions because of the in-process knowledge than that obtained by untransformed evolutionary algorithms, while reducing the average runtime. Furthermore, the equivalence between the optimal solutions of the transformed MOP and the untransformed MSCCOP can be theoretically proved.

关键词： evolutionary computation multi-objective optimization cardinality-constrained optimization problem multiple scenarios transformation p-median problem portfolio optimization problem

Influences of both Δ^(−) and Δ^(0) Particles on the Neutron Star Cooling

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Chinese Physics Letters 2012年第9期29卷 45-48页

作者： ding Wen-bo LI Ying MI Geng College of Mathematics and Physics Bohai UniversityJinzhou 121000 College of Chemistry Chemical Engineering and Food SafetyBohai UniversityJinzhou 121000

The influences ofΔquartet,especially Δ^(−)and Δ^(0) particles,on the neutrino scatting and cooling properties of neutron stars are *** results show thatΔquartet can change the density range of direct Urca process of nucleons for muons,as well as the neutrino emissivity and *** role ofΔon the cooling rates is *** is found thatΔquartet slows the neutron star cooling obviously in hyperonic neutron star *** in nuclear matter,Δcan not influence the cooling too much,unless the neutron star is quite ***Δ-meson coupling constants can also impact on the results,and the relatively smaller value,the stronger effects ofΔquartet.

关键词： constants meson

A physical model study of shale seismic responses and anisotropic inversion

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Petroleum Science 2021年第4期18卷 1059-1068页

作者： Pin-bo ding Fei Gong Feng Zhang Xiang-Yang Li State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum(Beijing)Beijing102249China CNPC Key Laboratory of Geophysical Exploration China University of Petroleum(Beijing)Beijing102249China

The seismic responses of the shale properties are critical for shale gas reservoir evaluation and *** has been widely reported that the clay minerals have substantial influences on the seismic wave anisotropy and ***,knowing the seismic responses of the clay-rich shales and estimation of shale elastic properties are significant for the shale gas industry.A physical model containing two groups of shale blocks as the target formations is constructed in *** group S contains six shale blocks with different clay contents,and the group N contains six shale blocks with different *** acquired 2D seismic data is used to analyze the seismic responses of two corresponding seismic *** anisotropic three-term inversion method is applied to one of the seismic inline to estimate the elastic properties the target shale *** inversed attributes can be used to reveal the effects of shale clay *** study shows the substantial significance of using a physical model to observe the seismic responses of shale *** inversion results indicate that the anisotropic three-term inversion method could provide accurate results of elastic properties as well as the P-wave anisotropy parameter for shale formations.

关键词： Physical model Shale Clay AVO Anisotropy

Cooling of Hyperonic Neutron Stars with Antikaons

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Chinese Physics Letters 2011年第7期28卷 85-88页

作者： ding Wen-bo YU Zi LIU Yu-Hui School of Mathematics and Physics Bohai UniversityJinzhou 121000 College of Science Nanjing Forestry UniversityNanjing 210037

We discuss the impact of hyperons on the neutrino emitting and the gross cooling features of neutron stars with K−and K0 *** results show that hyperons change the density ranges of the direct Urca process with nucleons and the Urca processes of K−and K0 condensations,as well as the values of neutrino ***,interactions between hyperons and antikaons make the neutrino luminosity *** is found that various hyperons play different roles in neutron *** massive stars,Σhyperons make the cooling ***,Λcan hardly change the cooling history but it reduces the mass of neutron stars.

关键词： condensation slower stars