On Q Values and Other Energy Parameters for Superheavy Element Synthesis

Q value and optimal exciting energy of hypothetical superheavy nuclei in cold fusion reaction are calculated with relativistic mean field model and semiemperical shell model mass equation (SSME) and the validity of the two models is tested. To give useful references for the experiments in the superheavy nuclei synthesized in cold fusion reactions,the Q value, fusion barrier and optimal exciting energy for the possible target plus projectile combinations suggested by Gupta et al. are calculated and the most possible target plus projectile combinations are pointed out according to our calculations.

结合优势结构和最小目标Q值的深度强化学习导航算法

针对现有基于策略梯度的深度强化学习方法应用于办公室、走廊等室内复杂场景下的机器人导航时,存在训练时间长、学习效率低的问题,本文提出了一种结合优势结构和最小化目标Q值的深度强化学习导航算法.该算法将优势结构引入到基于策略梯度的深度强化学习算法中,以区分同一状态价值下的动作差异,提升学习效率,并且在多目标导航场景中,对状态价值进行单独估计,利用地图信息提供更准确的价值判断.同时,针对离散控制中缓解目标Q值过估计方法在强化学习主流的Actor-Critic框架下难以奏效,设计了基于高斯平滑的最小目标Q值方法,以减小过估计对训练的影响.实验结果表明本文算法能够有效加快学习速率,在单目标、多目标连续导航训练过程中,收敛速度上都优于柔性演员评论家算法(SAC),双延迟深度策略性梯度算法(TD3),深度确定性策略梯度算法(DDPG),并使移动机器人有效远离障碍物,训练得到的导航模型具备较好的泛化能力.

一类分数阶q-差分方程广义反周期边值问题

考虑一类非线性Caputo型分数阶q-差分方程的广义反周期边值问题,用Banach不动点定理给出该广义反周期边值问题解的存在唯一性结果,并给出一个应用实例.

Davis's Inequalities for Two-Parameter Banach Space Valued Strong Martingales and Geometrical Properties of Banach Spaces

In this paper we investigated theL 1 norm inequalities of theP square and the maximal functions of two-parameterB-valued strong martingales, which can be applied to characterizep-smoothness andq-convexity of Banach spaces.

The value of vegetation ecosystem services:a case of Qinling-Daba Mountains

According to differences in vegetation types and their coverage, combining the latest research, using theory and method on the value of vegetation ecosystem services, this paper not only calculated goods produced by different types of vegetation but also estimated the value of various vegetation ecosystem services and set up database, GIS and eco-account of vegetation ecosystem. The result was as follows: the value of vegetation's primary productivity, soil and fertility conservation, water conservation, CO 2 fixation and O 2 release was 199.6 billion yuan/a, 22.64 billion yuan/a, 22.66 billion yuan/a, 352.24 billion yuan/a and 374.19 billion yuan/a, respectively. The total value of ecosystem services was 968.33 billion yuan/a. The temperate deciduous broad-leaved forest had the highest contribution rate, accounting for 16.42%. The result of value can reflect regional reality more exactly.

Q value of anelastic S-wave attenuation in Yunnan region

The study of seismic attenuation property is a major subject in seismology. Seismic waves recorded by seismic stations （seismographs） contain source effect, seismic wave propagation effect, site response of seismic stations and instrumental response. The path effect of seismic wave propagation, site response of seismic stations and instrumental response must be taken out in the study of source property with seismic data. The path effect of seismic wave propagation （seismic attenuation） involves an important influential factor, the anelastic attenuation of medium, which is measured with quality factor Q, apart from geometric attenuation with the distance. As a basic physical parameter of the Earth medium, Q value is essential for quantitative study of earthquakes and source property （e.g. determination of source parameters）, which is widely used in earthquake source physics and engineering seismology.

Visual Quality of Q-value-guided LASIK in the Treatment of High Myopia

Purpose:To compare visual performance and patient satisfaction following Q-value-guided customized laser-assisted in situ keratomileusis (LASIK) and standard LASIK in the treatment of high myopia.Methods:A total of 116 patients with high myopia (-6.00 to-9.50D;astigmatism from-0.00 to-2.00D) were treated using Z-217 excimer laser.(Bausch & Lomb)..Sixty-six patients (132 eyes) receiving Q-value-guided customized LASIK were assigned into the experimental group,.and 50 cases (100 eyes) receiving standard LASIK were used as normal controls.All subjects were followed up for > 6 months to monitor for night vision problems measure postoperative quality of life.Results:.In the experimental group,.night vision acuity decreased in 3 cases (4.5%),and glare was reported in 13 patients (19%) during the 6-month follow up period.In the control group,.night vision problems were noted in 9 cases (18%),.and glare occurred in 21 patients (42%).These differences between the two groups were statistically significant (P<0.05).According to the postoperative questionnaire,satisfaction with visual performance and quality of life was reported in 73% of the experimental group,and 52% of the control group(P<0.05).Conclusion:.Patients with high myopia surgically treated by Q-value-guided LASIK had better night-time visual performance and a higher degree of satisfaction compared with subjects receiving standard LASIK.

锻造变形过程中孔洞缺陷闭合行为Q-Value法研究

以宽厚板支承辊锻造所用大型钢锭为研究对象,通过对模拟软件中用户子程序二次开发,运用Q-Value阈值法对大锻件内部孔洞缺陷在锻造变形过程中的闭合行为进行预测,从而极大简化了传统孔洞类缺陷变形的模拟思路,提高了模拟效率。

Characteristics of coda Q-value in the midnorthern part of Ningxia

On the basis of previous studies, this paper in studying the coda Q-valuc of near shocks, has proposed using the sampling depth to describe the effect of lapse time on the Q-value, and has investigated the dependence of coda wave of earthquakes on frequency and sampling depth. Analysis of digital seismograms recorded by the Yinchuan Telemetric Seismic Network, Ningxia, shows that not only the coda wave Q-value of shocks is strongly dependent on frequency but also its dependence on Samling depth cannot be neglected. In the commonly used formula that describes the dependence cbaracteristics of coda Q-value of endquakes, Q = Qof', the parameter Qo rises obviously whilc n drops when the sampling depth increases, and their changes can be fitted by linear relations. This paper has explained such a characteristic. Whether this characteristic exists universally needs to be verified by more study results because the genetic mechanism of coda wave of earthquakes is more complex.

双波长LD泵浦Nd^(3+)∶YAG免温控被动调Q激光器的研究

传统的固体激光器体积、重量大,功耗高,限制了其在空间受限设备中的应用。被动调Q的LD泵浦免温控固体激光器省去了复杂的温度控制装置,调Q机构简单,能够满足复杂温度环境的特殊应用场景的小型化、低功耗要求。提出了基于双波长LD泵浦实现宽温度范围免温控阈值自适应的1.06μm激光脉冲输出方法。基于Nd∶YAG晶体设计了角锥棱镜谐振腔,仿真分析了LD泵浦源到激光棒的面心距对热负载的影响,并确定4 mm的最佳面心距。数值分析了相同泵浦功率下-40~60℃温度范围内激光静态能量输出变化,以及不同初始透过率的可饱和吸收体对激光阈值脉宽的影响。计算结果表明在-37℃~60℃范围内,阈值脉宽都在200μs以下,阈值脉宽最低点达到了29.4μs。构建主波实时探测的阈值自适应调节装置并搭建实验系统,实验结果表明,在温度范围为-35~60℃时,阈值脉宽变化范围为40~180μs。采用激光腔体一体加工成型,应用轻量化的铝合金材料,实现工程化应用,体积83.5 mm×44 mm×29.5 mm,重量约为230 g。在23.8%初始透过率的饱和吸收体条件下实现单脉冲输出能量42 mJ,脉冲宽度5.2 ns。

The Q value variations in the preparing pro－cess of rock rupture

In this paper, the 'spectral amplitude ratio method'(SAR) , 'energy method'(EN) and 'coda wave method'(CW) are used to calculate the Q value variations of gneiss in the preparing rupture process. The obtained results show that the variation state of Q values by SAR features the shape of relative stability gradual increment to the maximum then decrement and final rupture.The variation state of Q values by EN is just contrary to that by SAR,i.e.with the shape of stability decrement increment and final rupture . The varation state of Q values by CW is similar to that by EN, its main frequency features the shape of relatively high value decrement to the minimum increment and final rupture.But to the high frequency (higher than the main frequency),the variation state of Q values features the shape of the stable value increment to the maximum decrement and final rupture.At the same time, the results by coda wave amplitude spectrum show that, when stress reaches 70% of rupture stress, the high frequency component of S wave rapidly reduces( Q c increasing); at the time of impending the main rupture, the main frequency component reduces with a large scale( Q c increasing again), this may be the reason which causes the different variation states of two coda Q values.The result of amplitude spectra of P, S(initial wave) waves also show that with the appearance of microcracks the frequency band of S wave turn to be narrow, the high frequency component is reduced quickly, i.e. the S wave spectra have different variation states with different frequeny components. That is why the Q s obtained by different methods have different variation characteristics.

Lg coda Q_0 value and its relation with the tectonics in Chinese mainland and adjacent regions

We have collected 432 vertical component records from 45 stations of new CENC （China Earthquake Network Center） in Chinese mainland and adjacent regions. These records were used to calculate Q0 （Q at 1Hz） and η values of Lg coda from each station by the stack spectral ratio （SSR） method. Then the tomography method was applied to obtaining lateral variation of Q0 and η values in Chinese mainland and adjacent regions. The result indicates that Q0 value varies between 150 and 600 in the studied areas. Yunnan, southwest Sichuan, and northwest Myanmar show the lowest Q0 value （Q0〈240） and the crust of these regions is characterized by complicated crack and strong hydrothermal activity. The highest Q0 value （Qo〉510） exists in the border of southern Mongolia, Alxa and Ordos block. The η value varies between 0.45 and 0.75 in Chinese mainland and its adjacent regions.

Time Course of Q Value after Myopic Laser-assisted In Situ Keratomileusis

Objective To assess the time course of Q value after myopic laser-assisted in situ keratomileusis(LASIK) and preliminarily evaluate the determinants of the difference of Q value between before and after LASIK.Methods We performed a retrospective,longitudinal investigation on patients undergoing wavefront optimized LASIK therapy for emmetropization.A total of 418 eyes from 222 cases were examined preoperatively,and partly followed up at one week(172 eyes),one month(134 eyes) and three months(51 eyes) after surgery.The horizontal,vertical and total Q values of cornea were calculated from eccentricity measured at the central 6-mm corneal zones respectively.Potential determinants of the change of Q value were analyzed using multiple linear regressions.Results The mean Q value was-0.17±0.13 preoperatively,and 0.99±0.70,0.97±0.66,and 0.86±0.41 one week,one and three months postoperatively,respectively.One way analysis of variance(ANOVA) demonstrated significant differences between measurements made before surgery and at all postoperative times(at one week,one and three months;all P<0.0001,Bonferroni post hoc),but no significant differences were found among postoperative groups.Significant differences of Q values between horizontal and vertical meridians were found before surgery and at all postoperative times(all P<0.0001).Multiple regression analysis revealed that change of Q value significantly correlated with manifest refraction spherical equivalent(r=0.116,P<0.0001) and axial length(r=0.264,P<0.0001).Conclusions Over the study period,the primary changes in Q value occur within 1 week after surgery,and then become slightly decreased and nearly stable.Manifest refraction spherical equivalent and axial length play a significant role in the change of postoperative Q value.

铁路隧道BQ法、Q值法、RMR法相互关系研究

研究目的:围岩等级是铁路隧道设计和施工需确定的关键参数,随着中国铁路“走出去”战略的深入实施,我国设计工程师与国际咨询在隧道围岩分级方法的选取和应用上往往难以达成共识,从而影响海外工程的顺利开展。为研究围岩分级国标BQ法与国际主流Q值法和RMR法间的相互关系,总结对比BQ法、Q值法、RMR法三种围岩分级方法间差异,选取国内外多座代表性铁路隧道,对同一里程掌子面分别采用上述三种方法进行围岩分级,并结合其他文献研究成果,对分级结果进行对比分析。研究结论:(1)Q值法、RMR法在实际工程应用中均存在利弊,现场围岩等级的确定宜结合国标BQ法相互校核得出结论;(2)[BQ]值和Q值间关系符合指数函数,[BQ]值和RMR值间符合线性关系,Q值和RMR值间关系符合对数函数;(3)不同文献在BQ法、Q值法、RMR法间相互关系研究成果差异性大小方面,Q值和RMR值关系最小,也最为成熟,[BQ]值和RMR值关系次之,[BQ]值和Q值关系最大;(4)本文建立了国标BQ法与国际Q值法和RMR法间围岩等级划分对应关系表,在无法应用BQ法划分围岩级别情况下,可通过查表帮助国内设计人员理解和选择围岩支护体系,研究成果将有利于国标BQ法与国际Q值法和RMR法间的相互借鉴和融合,对海外隧道工程设计和施工具有一定指导意义。

Q-值下集Quantale

该文主要研究Q-值下集Quantale,它可以看作是下集Quantale的一般形式.首先证明了序半群范畴与超凝聚式Quantale范畴是等价的;其次证明了Q-值下集Quantale F_(Q)(S)本质上就是下集Quantale D(S)和Quantale Q的张量积.

Research on the Characteristics of the Coda Q Value in the Jiangsu Area

In this paper,research is conducted on the characteristics of coda Q values of the Jiangsu area,based on the Aki single backscattering model with the waveforms recorded by the Jiangsu digital seismic network. The results show that the Jiangsu area is a high Q value area as a whole,but the Q value differs obviously between different regions,characterized generally as high in the south and low in the north. This study focuses on 4 sub-regions where the stations are relatively dense,the tectonic features are distinguishing,and the calculation results of coda Q0 are fairly concentrated,and obtains the characteristic relationship between the Q value and frequency of the 4 regions. The region from south Jiangsu to the Yangtze River estuary and that around the Maoshan fault zone are the high Q value areas in Jiangsu; the region from central Jiangsu to the waterfront area is the low Q value area in Jiangsu Province,and the Lianyungang region in northern Jiangsu is the moderate Q value area. Comparing the tectonic activity and seismicity of the 4 different Q value sub-regions,there is a certain correlation between Q value,crustal movement and seismicity.

近地表连续介质区Q值调查应用研究

为了提高地震资料的分辨率,对原始资料进行吸收补偿,需要提高近地表Q模型的精度。针对结构疏松、速度变化快且风化层厚度较大的连续介质近地表对地震波吸收衰减严重的问题,开展了品质因子调查、近地表Q建模等方面研究工作。结果表明:1)井中激发、地表和井底同时接收的双井微测井调查方式,可提高品质因子的精度;2)涵盖了不同风化层速度、厚度且样点数据充分的近地表Q值调查结果保证了Q-v经验公式的统计规律;3)微测井调查的高精度近地表模型为构建层状近地表Q模型奠定了基础;4)连续介质近地表Q模型更加真实地反映了实际近地表Q值的分布规律。以上成果认识,对近地表为连续介质的沙漠、黄土塬等工区提高分辨率地震勘探采集具有一定指导意义。

基于区间q阶orthopair模糊可能度的多属性决策方法

判定区间q阶orthopair模糊数(IVq-ROFNs)排序关系是解决区间q阶orthopair模糊(IVq-ROF)决策问题的关键环节,而可能度测度是重要工具之一。针对现有得分函数、精确函数和可能度测度无法处理的反直觉问题,提出一种基于IVq-ROF可能度的多属性决策方法。首先,定义IVq-ROF环境下的可能度测度,并讨论其相关性质;然后,通过解决反直觉问题的例子说明本文所提IVq-ROF可能度测度的可行性和优势性;最后,构建基于IVqROF可能度的多属性决策模型,并由两个算例分析现有可能度在IVq-ROF环境中扩展的适用性,验证本文所提方法的有效性与合理性。

Iterative Technology in a Singular Fractional Boundary Value Problem with q -Difference

In this paper, we apply the iterative technology to establish the existence of solutions for a fractional boundary value problem with q-difference. Explicit iterative sequences are given to approxinate the solutions and the error estimations are also given.

MULTI-VALUED TOTALLY QUASI-φ-ASYMPTOTICALLY NONEXPANSIVE SEMI-GROUPS AND STRONG CONVERGENCE THEOREMS IN BANACH SPACES

The purpose of this article is first to introduce the concept of multi-valued to- tally Quasi-φ-asymptotically nonexpansive semi-groups, which contains many kinds of semi- groups as its special cases, and then to modify the Halpern-Mann-type iteration algorithm for multi-valued totally Quasi-cS-asymptotically nonexpansive semi-groups to have the strong convergence under a limit condition only in the framework of Banach spaces. The results presented in this article improve and extend the corresponding results announced by many authors recently.