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Journal of Iron and Steel Research International 2016年第3期23卷 244-252页

作者： ming ma Hua DING Zheng-you TANG Jing-wei ZHAO Zhou-hua JIANG guang-wei FAN School of material Science and Engineering Northeastern University School of Mechanical Materials and Mechatronic EngineeringUniversity of Wollongong Technology Center Shanxi Taigang Stainless Steel Co.Ltd.

Hot compression tests were carried out in the temperature range of 1 223-1 473 Kand strain rate range of0.01-30s^-1 to investigate the flow behavior and microstructural evolution of super duplex stainless steel 2507（SDSS2507）.It is found that most of the flow curves exhibit a characteristic of dynamic recrystallization（DRX）and the flow stress increases with the decrease of temperature and the increase of strain *** apparent activation energy Qof SDSS2507 with varying true strain and strain rate is *** the strain increases,the value of Qdeclines in different ways with varying strain *** microstructural evolution characteristics and the strain partition between the two constituent phases are significantly affected by the Zener-Hollomon parameter（Z）.At a lower lnZ,dynamic recovery（DRV）and continuous dynamic recrystallization（CDRX）of the ferrite dominate the softening mechanism during the *** this time,steady state deformation takes place at the last stage of *** contrast,a higher lnZ will facilitate the plastic deformation of the austenite and then activate the discontinuous dynamic recrystallization（DDRX）of the austenite,which leads to a continuous decline of the flow stress even at the last deformation stage together with CDRX of the ferrite.

关键词： duplex stainless steel hot deformation behavior dynamic recovery dynamic recrystallization strain partition

Monotone Chains in Modulus of Two Classes of Dirichlet Coefficients

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Acta mathematica Sinica,English Series 2023年第6期39卷 1101-1114页

作者： guang Shi Lü Qiang ma School of mathematics Shandong UniversityJi'nan 250100P.R.China

Let f1,...,fkand g1,...,qkbe non-CM newforms of square-free *** byλ_(sym)jf_(i)(n)the coefficients of the Dirichlet expansion of L(sym^(j)f_(i),s)andν1,...,νkthe distinct positive integers such thatλ_(sym)jf_(i)(νi)≠*** this paper,we obtain that there exist infinitely many positive integers m such that 0<λ_(sym)jf_(1)(m+ν1)|<|λ_(sym)jf_(2)(m+ν2)|<…<|λ_(sym)jf_(k)(m+νk)|.For coefficients of the Dirichlet expansion of L(sym^(j1)f×sym^(j2)g,s),we have a similar result.

关键词： Dirichlet coefficients Sato-Tate conjecture

Cryptanalysis and security enhancement of a remote user authentication scheme using smart cards

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The Journal of China Universities of Posts and Telecommunications 2012年第5期19卷 104-114页

作者： WANG Ding ma Chun-guang College of Computer Science and Technology Harbin Engineering University Harbin 150001 China Automobile management Institute of PLA Bengbu 233011 China

With the broad implementations of the electronic business and government applications, robust system security and strong privacy protection have become essential requirements for remote user authentication schemes. Recently, Chen et al. pointed out that Wang et al.＇s scheme is vulnerable to the user impersonation attack and parallel session attack, and proposed an enhanced version to overcome the identified security flaws. In this paper, however, we show that Chen et al.＇s scheme still cannot achieve the claimed security goals and report its following problems：（1） It suffers from the offline password guessing attack, key compromise impersonation attack and known key attack; （2） It fails to provide forward secrecy; （3） It is not easily repairable. As our main contribution, a robust dynamic ID-based scheme based on non-tamper resistance assumption of the smart cards is presented to cope with the aforementioned defects, while preserving the merits of different related schemes. The analysis demonstrates that our scheme meets all the proposed criteria and eliminates several grave security threats that are difficult to be tackled at the same time in previous scholarship.

关键词： cryptanalysis authentication protocol smart card non-tamper resistant forward secrecy

Research on effect factors of current efficiency in the process of sponge titanium production by electrolytic method

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Research on effect factors of current efficiency in the proc...

A Middle Triassic stem-neopterygian fish from China sheds new light on the peltopleuriform phylogeny and internal fertilization

第八届中国功能材料及其应用学术会议

作者： ma guang-qiang ZOU ming WANG Qi-ling College of Biology and Chemistry Panzhihua University

ISBN: (纸本)9783037859698

This paper systematically analyzes the various factors that affect the current efficiency in the process of sponge titanium production by *** research result shows that firstly,when electrolysis is undertaken in CaCl molten salt system under the condition that the pressure is under 101 Pa,temperature is at 850℃,space between electrodes is 5cm,cathodic current density is 1.05 *** and anodic current density ***,the reoxidation of sponge titanium can be effectively avoided,the loss of electric current can be reduced and current efficiency can be greatly ***,current efficiency can be greatly improved when mix molten salt system CaCl +A is adopted,which can greatly reduce the electrolysis temperature and the resistance of molten ***,current efficiency can be greatly improved through selecting appropriate vacuum degree,appropriate molten salt system,appropriate space between electrodes,appropriate current density;in addition,keeping tidy reduction cell inside and adopting high-purity molten salt and raw material TiO are another ways for current efficiency improvement.

关键词： Electrolysis Eurrent efficiency Effect factors

来源： cnki会议评论

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Science Bulletin 2016年第22期61卷 1766-1774页

作者： guang-Hui Xu Xin-Ying ma Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences

Internal fertilization and viviparity are easily observed and well studied in living neopterygian fishes(14teleostean families), but they are difficult to identify in extinct taxa due to the limitation of the fossil record. The Peltopleuriformes from the Middle to Late Triassic of Europe and South China are a stem group of Neopterygii that may have first evolved internal fertilization and viviparity in this clade because they show a highly modified anal fin in presumed males resembling the intromittent organ in living viviparous teleosts. Until recently, Peltopleurus lissocephalus and P. rugosus from the Ladinian/Anisian boundary(*242 ma) of Monte San Giorgio area in Switzerland and Italy represent the oldest record of Peltopleuriformes, and the phylogenetic interrelationships of this group remain controversial. Here, we report the discovery of a new peltopleuriform, Peltopleurus nitidus sp. nov., based on eleven well-preserved specimens from the early Middle Triassic(Pelsonian, Anisian, *244 ma)of Luoping, eastern Yunnan, China. The discovery documents the oldest convincing peltopleuriform, extending the geological range of this clade by proximately two million years. Results of the phylogenetic analysis recover *** at the base of Peltopleuridae, and provide robust support for the sister-group relationships of Peltopleuridae with Thoracopteridae within the Peltopleuriformes. The male anal fin of P. nitidus shows a primitive condition unknown in other peltopleuriforms. Comparative studies of the male anal fin in P. nitidus and other peltopleuriforms shed new light on the internal fertilization in this group.

关键词： Sexual dimorphism Viviparity Peltopleuridae Thoracopteridae Triassic

透明质酸钠联合超短波理疗对踝关节创伤性滑膜炎患者Baird-Jackson评分的影响

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海南医学 2017年第1期28卷 67-69页

作者：杜耿张晶刘烈东高光明马江卫杜成高榆林市第一医院骨科陕西榆林719000

目的研究透明质酸钠(SH)对踝关节创伤性滑膜炎(TSAJ)患者Baird-Jackson评分的影响。方法选择我院骨科2012年8月至2015年8月收治的90例TSAJ患者作为研究对象,共计108踝。以随机数表法随机分为观察组(48例,56踝)和对照组(42例,52踝)。对... 详细信息

目的研究透明质酸钠(SH)对踝关节创伤性滑膜炎(TSAJ)患者Baird-Jackson评分的影响。方法选择我院骨科2012年8月至2015年8月收治的90例TSAJ患者作为研究对象,共计108踝。以随机数表法随机分为观察组(48例,56踝)和对照组(42例,52踝)。对照组患者单纯采用超短波理疗(UWT)方案治疗,观察组患者则在其基础上另注射SH治疗5周,于治疗前和治疗后3个月对两组患者分别实施Baird-Jackson评分和VAS评分,利用CT等影像学手段评价患者的症状,比较两组患者治疗前后的Baird-Jackson评分和VAS评分以及疗效。结果观察组患者治疗后3个月的Baird-Jackson评分显著上升,且幅度从(68.2±7.3)分上升到(80.3±7.3)分,高于对照组[(67.9±6.7)分上升到(71.4±6.8)分],两组比较差异有统计学意义(P<0.05)。两组患者治疗后的VAS评分均显著下降,但观察组下降幅度从(7.47±2.03)分至(3.04±0.85)分,高于对照组[(7.50±2.55)分至(4.29±1.17)分],两组比较差异有统计学意义(P<0.05);观察组患者的治疗总有效率为97.92%(47/48),明显高于对照组的83.33%(35/42),差异有统计学意义(P<0.05)。结论 SH联合UWT治疗TSAJ可有效改善患者的Baird-Jackson评分,提高疗效,值得临床推荐应用。

关键词：透明质酸钠超短波理疗踝关节创伤性滑膜炎 Baird-Jackson评分

Mechanical Harvesting Effects on Seed Yield Loss,Quality Traits and Profitability of Winter Oilseed Rape (Brassica napus L.)

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Journal of Integrative Agriculture 2012年第8期11卷 1297-1304页

作者： ma Ni ZHANG Chun-lei LI Jun ZHANG ming-hai CHENG Yu-gui LI guang-ming ZHANG Shu-jie Oil Crops Research Institute Chinese Academy of Agricultural Sciences/Key Laboratory of Oil Crop Biology Ministry of Agriculture/Key Laboratory of Crop Cultivation and Physiology Ministry of Agriculture Wuhan 430062 PR.China Agricultural Institute of Yichang City Yichang 443004 P.R.China

China is one of the most important rapeseed producing countries in the world. Effective mechanical harvesting time for decreasing harvesting loss of winter oilseed rape has been becoming a critical factor. An elite cultivar Zhongshuang 11 （Brassica napus L.） was employed in two rounds of field experiments from 2009 to 2011. Seeds were sown with machine, three combine harvesting times namely combine harvesting A, B, and C （CHA, CHB, and CHC） were designed and manual harvesting （MH） as control was performed at maturity. The harvesting treatments were determined according to color of pod and seed in the field. Seed yield loss and quality in different treatments were evaluated. Results showed that both seed yields and harvesting losses in 2009-2010 were higher than that in 2010-2011, whereas seed oil contents in 2010-2011 were higher than that in 2009-2010. The highest yield appeared in CHB, which was significantly higher than that in MH. Furthermore, harvesting loss in CHB were 50% that in MH. Seed oil content and chlorophyll exhibited no obvious difference between CHB and MH. Economic profit analysis demonstrated that mechanical sowing/combine harvesting （MS/CH） showed an input/output ratio of 1：1.6, and it was 1：1.2 in mechanical sowing/manual harvesting （MS/MH）. Labor-cost accounted for more than 70% of the total cost in MS/MH, which led to low profitability to a great extent. Our results suggested that CHB was the optimum harvesting time for winter oilseed rape along the Yangtze River.

关键词： winter oilseed rape (Brassica napus L.) combine harvesting harvesting loss seed quality economic profit

Dual-steering mode based on direct yaw moment control for multi-wheel hub motor driven vehicles:Theoretical design and experimental assessment

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Defence Technology（防务技术） 2022年第1期18卷 49-61页

作者： Zheng Zhang Xiao-jun ma Chun-guang Liu Shu-guang Wei Department of Weapons and Control Engineering Army Academy of Armored ForcesBeijing100072China

One of the main challenges for multi-wheel hub motor driven vehicles is the coordination of individual drivetrains to improve mobility and stability in the steering *** paper proposes a dual-steering mode based on direct yaw moment control for enhancing vehicle steering ability in complex environ *** control system is designed as a hierarchical structure,with a yaw moment decision layer and a driving force distribution *** the higher-level layer,the objective optimization function is con-structed to obtain the slip steering ratio,which represents the degree of vehicle slip steering in the dual-steering *** moment controller using active disturbance rejection control theory is designed for continuous yaw rate *** the actual yaw rate of the vehicle deviates from the reference yaw rate obtained by the vehicle reference model and the slip steering ratio,the yaw moment controller isactuated to determine the yaw moment demand for vehicle *** the lower-level layer,there is a torque distribution controller based on distribution rules,which meets the requirement of yaw moment demand without affecting the total longitudinal driving force of the *** verifying the validity and feasibility of the dual-steering mode,simulations were conducted on the hardware-in-loop real-time simulation ***,corresponding real vehicle tests were carried out on an eight-wheel prototype *** results were generally consistent with the simulation results,thereby demon-strating that the proposed dual-steering mode reduces steering radius and enhances the steering per-formance of the vehicle.

关键词： Multi-wheel hub motor driven vehide Dual-steering mode Direct ya w moment control Real-time simulation

Mesenchymal Stem Cells Proliferation on Konjac Glucomannan Microcarriers:Effect of Rigidity

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Chinese Journal of Polymer Science 2022年第9期40卷 1080-1089页

作者： Xing-Ran Yan Juan Li Xiang-ming Na Tong Li Yu-Fei Xia Wei-Qing Zhou guang-Hui ma State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Mesenchymal stem cells(MSCs)have attracted great attention as a source of cells for regenerative medicine owing to their self-renewal ability and multiple differentiation ***,the serious shortage of MSCs and the difficulty of maintaining the differentiation potential during culture in vitro limit their *** culture technology is an effective method to realize large-scale culture of MSCs,whereas the effect of microcarriers properties on MSCs proliferation and differentiation potential maintenance should be *** this study,Konjac glucomannan(KGM)microcarriers with a wide range of rigidity from 0.2 MPa to 10 MPa were prepared using water-in-oil emulsion *** was found that the microcarriers rigidity had great influence on MSCs by regulating cell spreading *** proliferation and good differentiation potential maintenance of MSCs were achieved on the intermediate rigidity about 2.51±0.65 MPa with the faster spreading rate of *** a result,MSCs on 2.51±0.65 MPa KGM microcarriers proliferated about 27 times,which was 1.7 times as much as MSCs cultured on the commercial microcarriers *** differentiation potential was also improved about 3.2 times compared to ***,it is indispensable to regulate microcarriers rigidity,especially for application of MSCs.

关键词： MSCs Proliferation Differentiation potential Rigidity Spreading

Immune checkpoint inhibition mediated with liposomal nanomedicine for cancer therapy

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Military Medical Research 2024年第1期11卷 98-114页

作者： guang-Long ma Wei-Feng Lin Faculty of Medicine Centre for Cancer ImmunologyUniversity of SouthamptonSouthampton SO166YDUK Department of Molecular Chemistry and materials Science Weizmann Institute of Science76100 RehovotIsrael Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China

Immune checkpoint blockade(ICB)therapy for cancer has achieved great success both in clinical results and on the *** the same time,success drives more attention from scientists to improve ***,only a small portion of patients are responsive to this therapy,and it comes with a unique spectrum of side effects termed immunerelated adverse events(irAEs).The use of nanotechnology could improve ICBs’delivery to the tumor,assist them in penetrating deeper into tumor tissues and alleviate their *** nanomedicine has been investigated and used for decades,and is well-recognized as the most successful nano-drug delivery *** successful combination of ICB with liposomal nanomedicine could help improve the efficacy of ICB *** this review,we highlighted recent studies using liposomal nanomedicine(including new emerging exosomes and their inspired nanovesicles)in associating ICB therapy.

关键词： Liposome Exosome Immune checkpoint blockade(ICB)