摘要：Based on experimental data,machine learning(ML) models for Young's modulus,hardness,and hot-working ability of Ti-based alloys were *** the models,the interdiffusion and mechanical property data were high-throughput re-evaluated from composition variations and nanoindentation data of diffusion ***,the Ti-(22±0.5)at.%Nb-(30±0.5)at.%Zr-(4±0.5)at.%Cr(TNZC) alloy with a single body-centered cubic(BCC) phase was screened in an interactive *** experimental results exhibited a relatively low Young's modulus of(58±4) GPa,high nanohardness of(3.4±0.2) GPa,high microhardness of HV(520±5),high compressive yield strength of(1220±18) MPa,large plastic strain greater than 30%,and superior dry-and wet-wear *** work demonstrates that ML combined with high-throughput analytic approaches can offer a powerful tool to accelerate the design of multicomponent Ti alloys with desired ***,it is indicated that TNZC alloy is an attractive candidate for biomedical applications.

摘要：In order to develop the appropriate constitutive equation which can precisely model high temperature flow stress of 6063 Al alloy, a series of isothermal hot compression tests were performed at temperatures from 573 to 773 K and strain rates from 0.5 to 50 s?1 on a Gleeble?1500 thermo-simulation machine. Zener–Hollomon parameter in an exponent-type equation was used to describe the combined effects of temperature and strain rate on hot deformation behaviour of 6063 Al alloy, whereas the influence of strain was incorporated in the developed constitutive equation by considering material constants (α,n,Q andA) to be 4th order polynomial functions of strain. The results show that the developed constitutive equation can accurately predict high temperature flow stress of 6063 Al alloy, which demonstrates that it can be suitable for simulating hot deformation processes such as extrusion and forging, and for properly designing the deformation parameters in engineering practice.

摘要：针对混凝土衬砌在高内水压下开裂渗漏问题,将隧洞概化为透水衬砌—灌浆圈—围岩厚壁圆筒模型,通过理论推导建立了考虑外水压力的水压致裂解析方法,实现了施作衬砌—充水加压—衬砌开裂全过程模拟。研究发现衬砌施作时承受外水压力作用,渗流为向洞内溢出;内压大于外压后,钢筋应力由压转为拉;衬砌开裂后,钢筋应力急剧增大—迅速下降—缓慢增加。开裂前衬砌与围岩处于相互挤压的状态,粘结力不影响衬彻结构受力;衬彻与围岩脱离后,衬砌与围岩单独承载,其变形和受力与粘结力无关。透水衬砌—灌浆圈—围岩模型与透水衬砌—围岩模型结果规律一致,但考虑灌浆后渗漏量显著下降。

摘要：HCSB-DEMO concept design is carried out at *** order to handle power from a core plasma region,a super-X divertor is preliminarily designed and investigated for *** increases the target surface area by expanding the magnetic flux surface with another X-point generated near the targets and increases the parallel connection length by moving the outer divertor target to larger R and *** heat load at the targets is investigated by *** heating power flowing into SOL/divertor regions being P=600 MW,when the density at the separatrix is ne=3.5×10^(19) m^(-3),the peak heat load at the inner and outer divertor is 9.2 MW/m^(2) and 3.7 MW/m^(2),respectively,which is much less than those of the standard divertor without impurity seeding,and also below the design targets(10 MW/m^(2)).Thus the super-X divertor may work well for HCSB-DEMO to solve the high heat load problem at the divertor target without impurity seeding from this preliminary concept design and simulation.

摘要：A conceptual design study of the HL-2M facility has shown that one can create not only a standard single-null divertor configuration on it,but also a second-order null(snowflake(SF))*** the SF divertor,the magnetic flux expansion closes to the separatrix and exceeds that of the standard configuration by more than a factor of 4 at the outer *** heat load at the divertor targets of this innovative configuration has been investigated by using *** is shown that the heat load it targets is different from that of the standard *** a result of the magnetic flux expansion,the peak heat load reduces and does not concentrate on a small area near the *** heat load profile becomes flat as compared to the standard *** the upstream density is 2.0×10^(19)/m^(3) with 10 MW heating power flowing into the SOL/divertor regions,the peak load at the outer divertor is 1.64 MW/m^(2) for the SF divertor,but it is 3.2 MW/m^(2) for the standard divertor,so the SF divertor can mitigate the heat load at the divertor targets when HL-2M operates at low plasma density and high heating power.

摘要：设计了一种包层为椭圆孔排列的六边形结构SF57软玻璃光子晶体光纤,在其纤芯区域引入了菱形排列的四个小椭圆孔.利用有限元法模拟了该光子晶体光纤的双折射和有效模场面积,获得了波长1.55μm处双折射为1.01×10^(-1),x和y偏振的有效模场面积分别为1.52μm^2、1.55μm^2的高双折射低有效模场面积光子晶体光纤.且对该光纤的结构参数进行了实验制作的容差性分析,得到了较大的制作容差对其光纤的双折射影响很小,具有较好的偏振稳定性.

摘要：所谓混堆模式下集装箱箱区内场桥调度问题,是指在固定时段内,将有限的场桥资源在混堆模式集装箱港口堆场的单个箱区内进行分配和排序,以最大限度地减少该时段内所有任务的等待成本和场桥非装卸成本为目标,并保证不能超过场桥的作业强度极限.在充分考虑了多场桥作业时须有安全距离和不能相互跨越,以及内外集卡的优先级有差异和集卡等待时间有上限等现实约束下,对此问题构建了非线性数学规划模型.基于问题自身的特点设计了基于任务排序的染色体结构,用融入禁忌搜索的混合遗传算法进行求解.最后通过实例分析证明了模型和算法的有效性.

摘要：针对由振动产生的触觉刺激,研究在可穿戴计算设备中利用振动信号表达情感的可能性.在分析触觉刺激、触觉表达、振动参数等内容的基础上,通过改变振动的强度、节奏与时长,设计出6种振动模式,分别对应愤怒、害怕、搞笑、悲伤、厌恶和惊奇这6种基本情感,并将这6种振动模式称为振动表情.将振动表情应用在可穿戴计算设备常作用的手指、手腕、上臂和脚踝这4个部位上,并通过比较振动表情在各部位的识别率确定被试能否在各部位准确识别出每一种振动模式所代表的情感.设计一款可穿戴式振动指环,探讨在远程通信场景下振动表情对于情感表达的作用,以评估振动表情的有效性.结果表明:在可穿戴计算设备中引入振动表情,通过振动刺激表达情感信息,可以有效提高情感识别的准确性,增强情感感知强度.可考虑在可穿戴计算设备中引入振动表情,将情感特征以振动的形式表现出来,从而提高情感传递的效率.

摘要：The interaction between Amyloid β(Aβ) peptide and acetylcholine receptor is the key for our understanding of how Aβ fragments block the ion channels within the synapses and thus induce Alzheimer’s ***,molecular docking and molecular dynamics(MD)simulations were performed for the structural dynamics of the docking complex consisting of Aβ and α7-n ACh R(α7 nicotinic acetylcholine receptor),and the inter-molecular interactions between ligand and receptor were *** results show that Aβ_(25-35) is bound toα7-n ACh R through hydrogen bonds and complementary shape,and the Aβ_(25-35) fragments would easily assemble in the ion channel of α7-n ACh R,then block the ion transfer process and induce neuronal *** simulated amide-I band of Aβ_(25-35) in the complex is located at 1650.5 cm^(-1),indicating the backbone of Aβ_(25-35) tends to present random coil conformation,which is consistent with the result obtained from cluster *** existing drugs were used as templates for virtual screening,eight new drugs were designed and semi-flexible docking was performed for their *** results show that,the interactions between new drugs and α7-n ACh R are strong enough to inhibit the aggregation of Aβ_(25-35) fragments in the ion channel,and also be of great potential in the treatment of Alzheimer’s disease.

摘要：设计了一种纤芯区域由中心椭圆缺陷孔和其横排的上下两侧椭圆孔组成的高双折射率光子晶体光纤，并在其纤芯中心椭圆缺陷孔中填充高折射率液体物质二硫化碳．利用有限元法分析了该光子晶体光纤的双折射率、功率限制因子、模场分布及色散系数特性．研究结果表明：液芯光纤具有较高的纤芯功率限制因子，在波长0．6～1．6μm范围内实现了宽带大负色散系数，在波长1．55μm处光纤双折射率达到了6．8×10^2，即该结构液芯光子晶体光纤同时实现了宽带大负色散和高双折射率特性．通过结构参量容差性分析得到该光纤具有较好的偏振稳定性．