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| 1 | 低渗透致密砂岩储层成藏期油气运移的动力分析显示文摘通过恢复库车坳陷克拉苏构造带深层和鄂尔多斯盆地伊陕斜坡延长组主要成藏期的过剩压力,结合对研究区低渗透储层的物性演化历史分析,对低渗透致密砂岩储层运移过程中油气可能的动力条件进行评价。结果表明:低渗透致密砂岩储层中油气运移的主要动力具有多样性;库车坳陷克拉苏构造带深层在天然气的成藏时期储层已经致密,天然气运移的主要动力为快速沉积、生烃、构造挤压等多因素作用形成的异常高压;鄂尔多斯盆地伊陕斜坡延长组在早、中期油充注时储层尚未致密,在浮力作用下发生侧向运移,晚期油充注时储层已经致密,油利用先前与油长期接触而具亲油性的残留路径沿优势输导通道侧向运移,毛细管力为主要动力,储层间的过剩压力差也起一定作用,是多期次多动力联合作用的结果。 | 张凤奇 王震亮 武富礼 高兴军 罗然昊 RUI Zhenhua | 2012 | 中国石油大学学报(自然科学版)2012，36，4： | 30 |
| 2 | Effect of Heat Treatment on Cu Distribution,Antibacterial Performance and Cytotoxicity of Ti-6Al-4V-5Cu Alloy显示文摘A copper-bearing Ti-6AI-4V-5Cu alloy was processed and subjected to different heat treatments to explore the relationship among microstructure,antibacterial performance,and cytocompatibility.Characterization of microstructure revealed that the solution treated alloy consisted of α phase,α' phase and(3 phase,while besides these phases,the aged alloy also contained the precipitations of intermetallic Ti_2Cu compound.The solution treated alloy showed better antibacterial performance with increasing the solution temperature.The Cu ions released from Ti—6AI—4V—5Cu alloy could effectively inhibit the formation of bacterial biofilm on the surface of alloy,and do not induce any cytotoxicity.The optimal heat treatment for Ti-6Al-4V-5Cu alloy was solution treated at 930 C,at which it could exhibit both promising antibacterial performance and no cytotoxicity. | Zheng Ma Ling Ren Rui Liu Ke Yang Yu Zhang Zhenhua Liao Weiqiang Liu Min Qi R.D.K.Misra | 2015 | Journal of Materials Science & Technology2015，31，7： | 10 |
| 3 | A Storage-Driven CO_(2) EOR for a Net-Zero Emission Target显示文摘Stabilizing global climate change to within 1.5℃requires a reduction in greenhouse gas emissions,with a primary focus on carbon dioxide(CO_(2))emissions.CO_(2)flooding in oilfields has recently been recognized as an important way to reduce CO_(2)emissions by storing CO_(2)in oil reservoirs.This work proposes an advanced CO_(2)enhanced oil recovery(EOR)method-namely,storage-driven CO_(2)EOR-whose main target is to realize net-zero or even negative CO_(2)emissions by sequestrating the maximum possible amount of CO_(2)in oil reservoirs while accomplishing the maximum possible oil recovery.Here,dimethyl ether(DME)is employed as an efficient agent in assisting conventional CO_(2)EOR for oil recovery while enhancing CO_(2)sequestration in reservoirs.The results show that DME improves the solubility of CO_(2)in in situ oil,which is beneficial for the solubility trapping of CO_(2)storage;furthermore,the presence of DME inhibits the'escape'of lighter hydrocarbons from crude oil due to the CO_(2)extraction effect,which is critical for sustainable oil recovery.Sto rage-driven CO_(2)EOR is superior to conventional CO_(2)EOR in improving sweeping efficiency,especially during the late oil production period.This work demonstrates that storage-driven CO_(2)EOR exhibits higher oil-in-place(OIP)recovery than conventional CO_(2)EOR.Moreover,the amount of sequestrated CO_(2)in storage-driven CO_(2)EOR exceeds the amount of emissions from burning the produced oil;that is,the sequestrated CO_(2)offsets not only current emissions but also past CO_(2)emissions.By altering developing scenarios,such as water alternating storage-driven CO_(2)EOR,more CO_(2)sequestration and higher oil recovery can be achieved.This work demonstrates the potential utilization of DME as an efficient additive to CO_(2)for enhancing oil recovery while improving CO_(2)storage in oil reservoirs. | Yueliang Liu Zhenhua Rui | 2022 | Engineering2022，，11： | 6 |
| 4 | Pathological changes in the lungs and lymphatic organs of 12 COVID-19 autopsy cases显示文摘Systematic autopsy and comprehensive pathological analyses of COVID-19 decedents should provide insights into the disease characteristics and facilitate the development of novel therapeutics.In this study,we report the autopsy findings from the lungs and lymphatic organs of 12 COVID-19 decedents—findings that evaluated histopathological changes;immune cell signature and inflammatory factor expression in the lungs,spleen and lymph nodes.Here we show that the major pulmonary alterations included diffuse alveolar damage,interstitial fibrosis and exudative inflammation featured with extensive serous and fibrin exudates,macrophage infiltration and abundant production of inflammatory factors(IL-6,IP-10,TNFo?and IL-I f).The spleen and hilar lymph nodes contained lesions with tissue structure disruption and immune cell dysregulation,including lymphopenia and macrophage accumulation.These findings provide pathological evidence that links injuries of the lungs and lymphatic organs with the fatal systematic respiratory and immune malfunction in critically ill COVID-19 patients. | Qian Liu Yu Shi Jun Cai Yaqi Duan Rongshuai Wang Hongyan Zhang Qiurong Ruan Jiansha Li Lei Zhao Yifang Ping Rong Chen Liang Ren Xiaochun Fei Heng Zhang Rui Tang Xi Wang Tao Luo Xindong Liu Xuequan Huang Zhenhua Liu Qilin Ao Yong Ren Jing Xiong Zhicheng He Haibo Wu Wenjuan Fu Pengnan Zhao Xinwei Chen Guoqiang Qu Yunyun Wang Xi Wang Jia Liu Dongfang Xiang Sanpeng Xu Xiaowei Zhou Qingrui Li Jinghong Ma Heng Li Jie Zhang Sizhe Huang Xiaohong Yao Yiwu Zhou Chaofu Wang Dingyu Zhang Guoping Wang Liang Liu Xiu-Wu Bian | 2020 | National Science Review2020，7，12： | 6 |
| 5 | Mineralogical Characteristics and in-situ Sulfur Isotopic Analysis of Gold-Bearing Sulfides from the Qilishan Gold Deposit in the Jiaodong Peninsula,China显示文摘Large-scale gold mineralization during the Early Cretaceous is identified in the Jiao-dong Peninsula of China.Sources of ore-forming fluids remain debated.We study the Qilishan gold deposit in the northwestern Jiaodong Peninsula with detailed mineralogical observation and in-situ sulfur isotope analyses,in order to reveal the gold occurrence and the origin of ore-forming fluids.The Qilishan gold deposit is mainly clastic altered rock-type in mineralization,and ore minerals are visible native gold,electrum,pyrite,chalcopyrite and galena,gangue minerals as quartz,sericite and calcite.The gold occurrence includes inclusion and intergranular types,formed within pyrites and chalcopy-rites and along their fissures.In-situ sulfur isotope analysis of gold-bearing sulfides suggests that the Qilishan deposit is enriched in heavy sulfur,withδ34S values mainly from+8.0‰to+12.0‰.δ34S val-ues increase gradually with the fluid evolution from the early to late stages,which is interpreted to be related to the loss of sulfur via sulfide precipitation.The crystallization of sulfides from hydrothermal fluids may have triggered the instability of Au(HS)2,and finally led to gold precipitation.Combined with sulfur isotope compositions of other gold deposits(n=43)and wall-rocks in the Jiaodong Peninsu-la,it is proposed that the ore-forming fluids were probably not directly originated from metamorphic wall-rocks(e.g.,Jiaodong Group).Moreover,the relatively long time interval rules out the possibility that the gold mineralization(ca.120 Ma)was associated with granitic magma activities(mostly 160-150 Ma).Possible ore genesis scenario is that,long-term subduction of slabs(e.g.,the Paleo-Pacific)with gold-enriched pyritic materials and crustal sedimentary rocks resulted in both high Au contents and positiveδ34S values of sulfur in the lithospheric mantle below the North China Craton.Subse-quently,devolatilization of the metasomatized mantle produced auriferous fluids that migrated up-ward along translithospheric fault systems,and gold finally precipitated in favorable structural posi-tions,generating the world-class Jiaodong deposits in the Early Cretaceous. | Xinghua Ma Qingwen Zeng Siyuan Tao Rui Cao Zhenhua Zhou | 2021 | Journal of Earth Science2021，32，1： | 3 |
| 6 | Efficient 16 Boolean logic and arithmetic based on bipolar oxide memristors显示文摘The physically separated memory and logic units in traditional von Neumann computers place essential limits on the performance and cause increased energy consumption,and hence in-memory computing is required to overcome this bottleneck.Here,a new bipolar memristor based in-memory logic approach is proposed,which is capable of achieving all 16 possible Boolean logic functions in a single device in less than3 steps.This approach does not require initialization and can facilitate logic cascading,and the calculation taking place in-situ is showcased by 1-bit full adder and 2-bit multiplier with improved efficiency,thus showing a great prospect in future in-memory computing architecture. | Rui YUAN Mingyuan MA Liying XU Zhenhua ZHU Qingxi DUAN Teng ZHANG Yu ZHU Yu WANG Ru HUANG Yuchao YANG | 2020 | Science China(Information Sciences)2020，63，10： | 3 |
| 7 | Direct Growth of Graphene on Silicon by Metal-Free Chemical Vapor Deposition显示文摘The metal-free synthesis of graphene on singlecrystal silicon substrates, the most common commercial semiconductor, is of paramount significance for many technological applications. In this work, we report the growth of graphene directly on an upside-down placed,single-crystal silicon substrate using metal-free, ambientpressure chemical vapor deposition. By controlling the growth temperature, in-plane propagation, edge-propagation, and core-propagation, the process of graphene growth on silicon can be identified. This process produces atomically flat monolayer or bilayer graphene domains, concave bilayer graphene domains, and bulging few-layer graphene domains. This work would be a significant step toward the synthesis of large-area and layer-controlled, high-quality graphene on single-crystal silicon substrates. | Lixuan Tai Daming Zhu Xing Liu Tieying Yang Lei Wang Rui Wang Sheng Jiang Zhenhua Chen Zhongmin Xu Xiaolong Li | 2018 | Nano-Micro Letters2018，10，2： | 2 |
| 8 | Chimeric classical swine fever (CSF)-Japanese encephalitis (JE) viral replicon as a non-transmissible vaccine candidate against CSF and JE infections显示文摘 | Zhenhua Yang Rui Wu Robert W. Li Ling Li Zhongliang Xiong Haizhong Zhao Deyin Guo Zishu Pan | 2012 | Virus Research2012，，1： | 2 |
| 9 | Study on Cook-off Test of HNS at Constant Temperatures显示文摘 | Zhenhua Du Rui Zhang Dongxiao Fu Honghai Tong Fang Li | 2012 | Procedia Engineering2012，，： | 1 |
| 10 | Morphology-dependent structures and catalytic performances of Au nanostructures on Cu_2O nanocrystals synthesized by galvanic replacement reaction显示文摘Au nanostructures were prepared on uniform Cu_2O octahedra and rhombic dodecahedra via the galvanic replacement reaction between HAu Cl4 and Cu2O. The compositions and structures were studied by Scanning Electron Microscope(SEM), Transmission Electron Microscope(TEM), High-Resolution Transmission Electron Microscope(HRTEM), X-Ray Diffraction(XRD), X-Ray Absorption Spectroscopy(XAS), X-ray Photoelectron Spectroscopy(XPS) and in-situ DRIFTS spectroscopy of CO adsorption. Different from the formation of Au–Cu alloys on Cu_2O cubes by the galvanic replacement reaction(Chem Nano Mat 2(2016)861-865), metallic Au particles and positively-charged Au clusters form on Cu_2O octahedra and rhombic dodecahedra at very small Au loadings and only metallic Au particles form at large Au loadings. Metallic Au particles on Cu_2O octahedra and rhombic dodecahedra are more active in catalyzing the liquid phase aerobic oxidation reaction of benzyl alcohol than positively-charged Au clusters. These results demonstrate an obvious morphology effect of Cu_2O nanocrystals on the liquid–solid interfacial reactions and prove oxide morphology as an effective strategy to tune the surface reactivity and catalytic performance. | Zhenhua Zhang Rui Song Tian Cao Weixin Huang | 2016 | Journal of Energy Chemistry2016，25，6： | 1 |
| 11 | An Integrated Framework for Geothermal Energy Storage with CO_(2)Sequestration and Utilization显示文摘Subsurface geothermal energy storage has greater potential than other energy storage strategies in terms of capacity scale and time duration.Carbon dioxide(CO_(2))is regarded as a potential medium for energy storage due to its superior thermal properties.Moreover,the use of CO_(2)plumes for geothermal energy storage mitigates the greenhouse effect by storing CO_(2)in geological bodies.In this work,an integrated framework is proposed for synergistic geothermal energy storage and CO_(2)sequestration and utilization.Within this framework,CO_(2)is first injected into geothermal layers for energy accumulation.The resultant high-energy CO_(2)is then introduced into a target oil reservoir for CO_(2)utilization and geothermal energy storage.As a result,CO_(2)is sequestrated in the geological oil reservoir body.The results show that,as high-energy CO_(2)is injected,the average temperature of the whole target reservoir is greatly increased.With the assistance of geothermal energy,the geological utilization efficiency of CO_(2)is higher,resulting in a 10.1%increase in oil displacement efficiency.According to a storage-potential assessment of the simulated CO_(2)site,110 years after the CO_(2)injection,the utilization efficiency of the geological body will be as high as 91.2%,and the final injection quantity of the CO_(2)in the site will be as high as 9.529×10^(8)t.After 1000 years sequestration,the supercritical phase dominates in CO_(2)sequestration,followed by the liquid phase and then the mineralized phase.In addition,CO_(2)sequestration accounting for dissolution trapping increases significantly due to the presence of residual oil.More importantly,CO_(2)exhibits excellent performance in storing geothermal energy on a large scale;for example,the total energy stored in the studied geological body can provide the yearly energy supply for over 3.5×10^(7) normal households.Application of this integrated approach holds great significance for large-scale geothermal energy storage and the achievement of carbon neutrality. | Yueliang Liu Ting Hu Zhenhua Rui Zheng Zhang Kai Du Tao Yang Birol Dindoruk Erling Halfdan Stenby Farshid Torabi Andrey Afanasyev | 2023 | Engineering2023，，11： | 1 |
| 12 | Cu_(2)O Nanocrystal Model Catalysts显示文摘Model catalysts approach is widely adopted in fundamental studies of complex heterogeneous cataly-sis.Traditional model catalysts are single crystal-based model catalysts,whose results,however,some-times suffer from the'material gap'and'pressure gap'when applied to working catalysts.Recently,uniform catalytic nanocrystals with well-defined structures have emerged,and we have put forward a concept of nanocrystal-based model catalysts for fundamental studies of complex heterogeneous ca-talysis under conditions approaching working catalysts as closely as possible.In this perspective,we summarize our research progresses on Cu_(2)O-based nanocrystal model catalysts.Following a brief in-troduction,we summarize controlled synthesis of uniform Cu_(2)O nanocrystals with various morpholo-gies,morphology-dependent surface compositions and structures and surface chemistry of uniform Cu_(2)O nanocrystals,and heterogeneous catalysis of Cu_(2)O-based nanocrystals.Finally,we conclude the concept of nanocrystal-based model catalysts and outlook that uniform nanocrystals can act not only as model catalysts but also as efficient catalysts. | Zhenhua Zhang Rui You Weixin Huang | 2022 | Chinese Journal of Chemistry2022，40，7： | 1 |
| 13 | Plasma-tungsten interactions in experimental advanced superconducting tokamak(EAST)显示文摘Tungsten(W)is used as the armor material of the International Thermonuclear Experimental Reactor(ITER)divertor and is regarded as the potential first wall material of future fusion reactors.One of the key challenges for the successful application of W in fusion devices is effective control of W at an extremely low concentration in plasma.Understanding and control of W erosion are not only a prerequisite for W impurity control,but also vital concerns to plasma-facing component(PFC)lifetime.Since the application of ITER-like water-cooled full W divertor in EAST in 2014,great efforts were made to inves-tigate W erosion by experiment and simulation.A spectroscopic system was developed to provide a real-time measurement of W sputtering source.Both experiment and simulation results indicate that carbon(C)is the dominant impurity causing W sputtering in L-mode plasmas,which comes from the erosion of C plasma-facing material(PFM)in the lower divertor and the main chamber limiters.The mixture layer on the surface of W PFCs formed through redeposition or the wall coating can effectively suppress W erosion.Increasing the plasma density and radiation can reduce incident ion energy,thus alleviating W sputtering.In H-mode plasmas,control of edge localized mode(ELM)via resonant magnetic perturbation(RMP)proves to be capable of suppressing intra-ELM W erosion.The experiences and lessons from the EAST W divertor are beneficial to the design,manufacturing and operation of ITER and beyond. | Fang Ding Guang-Nan Luo Xiahua Chen Hai Xie Rui Ding Chaofeng Sang Hongmin Mao Zhenhua Hu Jing Wu Zhen Sun Liang Wang Youwen Sun Jiansheng Hu 无 | 2019 | Tungsten2019，1，2： | 1 |
| 14 | Responsive MXene nanovehicles deliver CRISPR/Cas12a for boolean logic-controlled gene editing显示文摘Programmable and precise regulation of genetic information is crucial in bioengineering and biomedicine;however, it remains challenging to implement this objective. Here we deployed DNA-functionalized MXenes as a smart delivery system for spatiotemporally controllable genome editing. The MXene nanovehicles rationally integrated photothermal effect with nucleic acid strand displacement reaction, thereby allowing for the binary logic gate-controlled release of Cas ribonucleoprotein complexes in response to different input patterns of NIR light and nucleic acids. This system was highly programmable and could be harnessed to construct 2-input(AND, OR, and N-IMPLY) and 3-input(AND/OR and N-IMPLY/OR) logic gates for precise gene editing in mammalian cells. Moreover, an AND logic gate-controlled delivery system achieved selective induction of tumor cell death in a xenograft mice model using tissue-penetrating NIR light and cancer-relevant microRNA as the inputting cues.Therefore, the MXene nanovehicles adopted both the external and endogenous signals as the stimuli to precisely control gene editing under logic computation, presenting a helpful strategy for therapeutic genome editing. | Song Wang Zhenhua Zhang Rui Tang Fang He Yan Huang Zhou Nie Chunyang Lei | 2022 | Science China Chemistry2022，65，11： | 0 |
| 15 | Identification of broad neutralizing antibodies against Omicron subvariants from COVID-19 convalescents and vaccine recipients显示文摘Dear Editor,Omicron(B.1.1.529)was designated a variant of concern(VOC)on November 26,2021(Callaway,2021),and its subvariants BA.1,BA.2,and BA.3 emerged and circulated almost simultaneously(Desingu et al.,2022).BA.2 was more efficient in transmission and quickly overtook BA.1 to become the variant most frequently detected worldwide(Yamasoba et al.,2022a).Compared to the prototype SARS-CoV-2 spike protein(S),the BA.1 and BA.2 spike proteins harbor more than 30 mutations,of which 21 are identical between the two subvariants,while the BA.3 spike differs from BA.1 and BA.2 by 3 mutations in the receptor binding domain(RBD)(Fig.1A).More recently,BA.4 and BA.5(hereafter BA.4/5)emerged,sharing the same spike sequence and containing four additional mutations,Del69–70,L452R,F486V,and R493Q,compared with BA.2.BA.4/5 were detected first in South Africa and evolved independently of BA.2;they have spread widely and replaced BA.2 as the predominant VOC(Gruell et al.,2022b;Tegally et al.,2022).In addition,BA.2.75,derived from the BA.2 subvariant,harbors nine additional mutations in the spike protein compared with BA.2(Fig.1A).BA.4/5 and BA.2.75 have led to the continuous emergence of novel Omicron subvariants,including BF.7 and BQ.1.These new subvariants may be driving waves of pandemics. | Jun Chen Jing Yang Fangfang Chang Yabin Hu Qian Wu Shishan Teng Yongchen Liu Jian Zhang Rongzhang He Bo Liu Xingyu Zheng Ze Liu Yanxi Peng Zhenhua Xie Yuanfang Zhang Rui Lu Dong Pan You Wang Liting Peng Wenpei Liu Yi-Ping Li Xiaowang Qu | 2023 | Virologica Sinica2023，38，2： | 0 |
| 16 | Chemical characters and protective effect of Baqi Lingmao formula(巴芪灵猫方) on experimental liver injury显示文摘OBJECTIVE:To investigate the chemical characters of water-extract of Baqi Lingmao formula(巴芪灵猫方,BQLM formula)and its effects on anti-liver injury in model mice and live cells.METHODS:BQLM formula was composed of ten herbal medicines.We determined the contents of alkaloids,saponins,phenolic acids and flavonoid in BQLM formula by UV spectrophotometry.The active components of alkaloids and phenolic acids in BQLM formula were identified by HPLC chromatography.The anti-hepatic injury effects of BQLM formula were investigated with concanavalin A(Con A)-induced hepatitis model of mice,human liver LO2 and Hep G2.2.15 cells.RESULTS:BQLM formula(2 and 10 g/kg,orally)significantly improved the damages of liver tissues and functions caused by Con A in mice,reduced the infiltration of inflammatory cells into liver and inhibited the inflammatory cytokine secretion of interferon-γ,tumor necrosis factor-αand interleukin-6.BQLM formula simultaneously decreased the levels of alanine aminotransferase and aspartate aminotransferase of liver and serum,and recovered the superoxide dismutase and catalase activities of liver to normal levels in Con A-induced hepatic-injury mice.The serum of BQLM formula group stimulated the human liver LO2 cell proliferation in vitro.Further,BQLM formula obviously promoted the proliferation of normal hepatocytes(LO2 cells)and inhibited the hepatocytes death induced by Con A.It also significantly inhibited the proliferation of Hep G2.2.15 cells and decreased the secretion of HBs Ag and HBe Ag in vitro.CONCLUSIONS:BQLM formula has anti-inflammation and anti-hepatitis virus Beffects,and is capable of improving liver injury in vivo and in vitro. | LIU Lulu CHEN Yanxu LIU Lulu LI Man XU Rui QU Wensheng YIN Jiye ZHANG Xin ZHOU Zhenhua GAO Yating NIE Dan SHAN Junjie GAO Yueqiu | 2021 | Journal of Traditional Chinese Medicine2021，41，6： | 0 |
| 17 | Enhancing anchoring and catalytic conversion of polysulfides by nitrogen deficient cobalt nitride for advanced lithium-sulfur batteries显示文摘While lithium-sulfur(Li-S)battery has attracted remarkable attention owing to the high theoretical capacity,its practical application is still hindered by the shuttle and sluggish conversion kinetics of intermediate lithium polysulfides(Li PSs).Defect engineering,which can regulate the electronic structure and in turn influence the surface adsorption and catalytic capability,has been regarded as a feasible strategy to deal with the above challenges.However,few studies on nitrogen vacancies and their mechanisms are reported.Herein,cobalt nitride with nitrogen vacancies grown on multi-walled carbon nanotube(CNTCo N-VN)is designed and applied as the separator modification material to investigate the enhancing mechanism of nitrogen vacancies on Li-S batteries.The experimental evidence and theoretical calculation indicate that the introduction of nitrogen vacancies into cobalt nitride can enhance the chemical affinity to Li PSs and effectively hamper the shuttle effect.Meanwhile the reduced band gap of the d-band center of Co and p-band center of N for CNT-Co N-VNand the promoted diffusion of Li^(+) can expedite the solid-liquid and liquid-liquid conversions of sulfur species.Due to these superiorities,the cell with CNT-Co NVNmodified separator delivers a favorable initial capacity of 901 m Ah g^(-1)and a capacity of 660 m Ah g^(-1)can be achieved after 250 cycles at 2 C.This work explores the application of metal nitride with nitrogen vacancies and sheds light on the development of functional separators for high-efficient Li-S batteries. | Min Luo Yu Bai Rui Sun Meixiu Qu Mengyuan Wang Zhanfeng Yang Zhenhua Wang Wang Sun Kening Sun | 2022 | Journal of Energy Chemistry2022，31，10： | 0 |
| 18 | Cooperative Jobs Dispatching in Edge Computing Network with Unpredictable Uploading Delay显示文摘In this paper,the cooperative jobs dispatching problem in an edge computing network with multiple access points(APs)and edge servers is considered.Due to the uncertain traffic in the network between APs and edge servers,the job uploading delay can not be predicted accurately.Specifically,the job arrivals at the APs,the job uploading delay from APs to edge servers and the job computation time at the edge servers are all modeled as random variables.Since each job dispatching decision will affect the system state in the future,we formulate the joint optimization of jobs dispatching at all the APs and all the scheduling time slots as an infinite-horizon Markov decision process(MDP).The minimization objective is a discounted measurement of the average processing time per job,including the uploading delay,the waiting time and the computation time at the edge servers.In this problem,the approximate MDP should be adopted to address the curse of dimensionality.Conventional low-complexity approximate solution of MDP is usually hard to predict the performance analytically.In this paper,a novel approximate MDP solution framework is proposed via one-step policy iteration over a baseline policy,where the analytical performance bound can be obtained.Moreover,since the expression of the approximate value function is derived,the value iteration in conventional methods can be eliminated,which can essentially reduce the computation complexity.It is shown by simulations that the proposed low-complexity algorithm has significantly better performance than various benchmark schemes. | Bojie Lyu Yuncong Hong Haisheng Tan Zhenhua Han Rui Wang | 2020 | Journal of Communications and Information Networks2020，5，1： | 0 |
| 19 | Editorial for the Special Issue on Unconventional and Intelligent Oil and Gas Engineering显示文摘A key global challenge in the 21st century is how to secure sustainable access to energy for a growing global population—set to reach 10 billion by 2035—while coping with the threat of dangerous climate change.The oil and gas industry will still play an essential role in the energy transition by providing affordable and reliable energy to improve living conditions.Meanwhile,producing this energy with decreasing emissions supports a net-zero world. | Gensheng Li Jinsheng Sun Zhangxin Chen Zhenhua Rui | 2022 | Engineering2022，，11： | 0 |
| 20 | Structural Damage Law of Semiconductor Bridge Detonator under Impact and Overload Environment显示文摘Aiming to know the requirement of penetrating the munition semiconductor bridge detonator under the impact overload environment, the impact overload simulation device and the structural finite element software ANSYS/AUTODYN are used to study the variation of the axial dimension, charge and the chip gap of the semiconductor bridge detonator under the impact overload environment. The typical semiconductor bridge detonator is affected by the acceleration, and the strain increases with the increase of the acceleration. The semiconductor bridge detonator shows axial compression, in which the size becomes smaller, and the structural deformation occurs at the output end of the semiconductor bridge detonator. The typical semiconductor bridge detonator is elastically deformed when the acceleration is less than 40 000 g. When the acceleration is more than40 000 g, the semiconductor bridge detonator housing is plastically deformed. The gap between the drug column and the chip is divided into three stages with the increase of the acceleration. Initially,with the increase of the acceleration, the gap rises rapidly until the acceleration reaches 43 000 g,and when the gap reaches the maximum, the gap decreases rapidly with the increase of the acceleration. When the acceleration reaches 57 000 g, the gap tends to be 0 μm in the initial state, and then the gap does not change with the acceleration to keep tending to 0 μm. | Dongxiao Fu Rui Zhang Hu Liu Fang Li Zhenhua Du Hongliang Ma | 2020 | Journal of Beijing Institute of Technology2020，29，2： | 0 |
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