double

摘要： A Z-pinch dynamic hohlraum can create the high-temperature radiation field required by indirect-drive inertial confinement fusion.A dynamic hohlraum with peak radiation temperature over 300 eV can be obtained with a>50 MA Z-pinch driver according to the scaling law of dynamic hohlraum radiation temperature vs drive current.Based on a uniform 300 eV radiation temperature profile with a width of 10 ns,three double-shell capsules with radii of 2,2.5,and 3 mm are proposed,and the corresponding fusion yields from a one-dimensional calculation are 28.8,56.1,and 101.6 MJ.The implosion dynamics of the 2.5 mm-radius capsule is investigated in detail.At ignition,the areal density of the fuel is about 0.53 g/cm^(2),the fuel pressure is about 80 Gbar,and the central ion temperature is about 4.5 keV,according to the one-dimensional simulation.A two-dimensional simulation indicates that the double-shell capsule can implode nearly spherically when driven by the radiation field of a Z-pinch dynamic hohlraum.The sensitivities of the fusion performance to the radiation temperature profiles and to deviations in the capsule parameter are investigated through one-dimensional simulation,and it is found that the capsule fusion yields are rather stable in a quite large parameter space.A one-dimensional simulation of a capsule embedded in 50 mg/cm^(3)CH foam indicates that the capsule performance does not change greatly in the mimicked environment of a Z-pinch dynamic hohlraum.The double-shell capsules designed here are also applicable to laser indirect-drive inertial fusion,if a laser facility can produce a uniform 300 eV radiation field and sustain it for about 10 ns.

摘要： Cu^(+)-containing materials have shown various application prospects especially in adsorption and catalysis,because they are versatile,nontoxic and low cost.To date,developing a mild and controllable approach for the fabrication of Cu^(+) sites has remained a pronounced challenge.Herein,we report a series connection double-solvent strategy(SCDS) for fabricating Cu^(+)sites within MIL-101(Cr),a typical metal–organic framework.By employing the SCDS in which vitamin C is chosen as the environmentally benign reducing agent,Cu^(2+)was incorporated in the pores and then transformed to Cu^(+) in the confined spaces.Compared to the conventional high-temperature autoreduction method conducted under harsh environment(700°C for 12 h) with a low Cu^(+) yield(less than 50%),SCDS can selectively reduce Cu^(2+)to Cu^(+) at room temperature without generating any CuO.The resulting Cu^(+)modified MIL-101(Cr) exhibits good desulfurization performance in view of both uptake and recyclability.

摘要： Rational synthesis of robust layered double hydroxides(LDHs) nanosheets for high-energy supercapacitors is full of challenges.Herein,we reported an ultrasonication-assisted strategy to eco-friendly fabricate NiFe-LDHs nanosheets for the enhanced capacitive behavior.The experimental results combined with different advanced characterization tools document that the utilization of ultrasonication has a profound effect on the morphology and thickness of the as-obtained NiFe-LDHs,alternatively affecting the capacitive behavior.It shows that NiFe-LDHs nanosheets prepared with 2-h ultrasonic treatments display the exceptional capacitive performance because of the synergetic effect of ultrathin thickness,large specific surface area,and high mesoporous volume.The maximum specific capacitance of Ni_(3) Fe_(1)-LDHs nanosheets with the thickness of 7.39 nm and the specific surface area of 77.16 m~2 g^(-1) reached 1923 F g^(-1),which is competitive with most previously reported values.In addition,the maximum specific energy of the assembled NiFe-LDHs//AC asymmetric supercapacitor achieved 49.13 Wh kg^(-1) at400 W kg^(-1).This work provides a green technology to fabricate LDHs nanosheets,and offers deep insights for understanding the relationship between the morphology/structure and capacitive behavior of LDHs nanosheets,which is helpful for achieving high-performance LDHs-based electrode materials.

摘要： Methods:ARTIC PC was a double-blind,randomised,placebo-controlled trial done at 56 general practices in England.Eligible children were those aged 6 months to 12 years presenting in primary care with acute uncomplicated LRTI judged to be infective in origin,where pneumonia was not suspected clinically,with symptoms for less than 21 days.Patients were randomly assigned in a 1:1 ratio to receive amoxicillin 50 mg/kg per day or placebo oral suspension,in three divided doses orally for 7 days.Patients and investigators were masked to treatment assignment.The primary outcome was the duration of symptoms rated moderately bad or worse(measured using a validated diary)for up to 28 days or until symptoms resolved.The primary outcome and safety were assessed in the intention-to-treat population.The trial is registered with the ISRCTN Registry(ISRCTN79914298).

摘要： Background:A range of safe and effective vaccines against SARS CoV 2 are needed to address the COVID 19 pandemic.We aimed to assess the safety and efficacy of the COVID-19 vaccine SCB-2019.Methods:This ongoing phase 2 and 3 double-blind,placebo-controlled trial was done in adults aged 18 years and older who were in good health or with a stable chronic health condition,at 31 sites in five countries(Belgium,Brazil,Colombia,Philippines.

摘要： In this age of the Internet,using social software has become an indispensable part of our lives.Although social software allows us to share our daily life,there will always be negative comments on social media.Since these comments are very common on social media,some people may think that these bad comments will only make the publisher’s mood down for a moment.In fact,this small factor may cause some bigger changes to the user’s mind like the butterfly effect.The main focus of this research paper is how these negative reviews on social media affectsexual double standard(SDS).The prediction of this research is that these bad reviews will cause sexual double standard to a certain extent.So,when they do the implicit association test(IAT)after reading the bad reviews,it will cause the D score to drop.Of course,there are many imperfections in this research,so future research can focus on the correlation between SDS and social media more extensively.The implication of this research is to find out possible causes and solution of SDS,and further build a positive environment on social media.

摘要： With great achievements in efficiency,stability,and large-scale preparation of perovskite solar cells(PSCs),the com-mercialization of PSC is ongoing,but there is still an issue on lead toxicity.Although lead content in the device is low,the water solubility of lead salts leads to potential environmental pollution.At present,the non-lead perovskites studied in-clude:divalent metal perovskite(e.g.,Sn^(2+),Ge^(2+),Cu^(2+)),trivalent metal perovskite(e.g.,Bi^(3+),Sb^(3+),In^(3+)),tetravalent met-al double perovskite(e.g.,Sn^(4+),Pd^(4+),Ti^(4+),Pt^(4+))and mono-trivalent mixed double perovskite(e.g.,Ag+and Bi^(3+),Ag+and In^(3+),Ag^(+)and Sb^(3+)).Their properties are summarized in Table 1.Since the first report on non-lead double perovskite Cs2AgBiBr6 in 2016^([1]).

摘要： Inflammasomes function as intracellular sensors of pathogen infection or cellular perturbation and thereby play a central role in numerous diseases.Given the high abundance of NLRP1 in epithelial barrier tissues,we screened a diverse panel of viruses for inflammasome activation in keratinocytes.We identified Semliki Forest virus(SFV),a positive-strand RNA virus,as a potent activator of human,but not murine NLRP1.SFV replication and the associated formation of double-stranded(ds)RNA was required to engage the NLRP1 inflammasome.Moreover,delivery of long dsRNA was sufficient to trigger activation.Biochemical studies revealed that NLRP1 binds dsRNA via its LRR,resulting in its NACHT domain gaining ATPase activity.Altogether,these results establish human NLRP1 as a direct sensor for dsRNA and thus RNA virus infection.

摘要： 本发明涉及一种基于生成式对抗网络的Double‑LSTM电池容量估算方法，先配置第一电池数据训练集，从中获取样本数据；生成器对样本数据进行对抗生成，得到第一生成样本；判别器对样本数据和第一生成样本进行判别，并对生成式对抗网络参数进行更新；根据生成式对抗网络的目标函数对第一生成样本进行训练，对训练集进行扩充，形成第二电池数据训练集；将第二电池数据训练集依次经过模型中的残差网络与预测网络，完成数据特征提取；训练集输入模型训练，直至模型目标函数的数值不再下降；将电池数据测试集输入训练后的模型，得到电池容量估计值。生成式对抗网络对原有数据进行增强和扩充，同时提取输入数据特征，相比于其他基于数据驱动的方法具有更高的准确率。

摘要： 本发明涉及一种基于改进多目标Double DQN算法的燃料电池混合动力汽车能量管理方法，属于新能源汽车领域。由三部分组成：第一部分为建立燃料电池混合动力汽车的能量管理系统模型，主要包括整车纵向动力学模型、燃料电池氢耗模型、燃料电池寿命模型、动力电池等效电路模型和动力电池衰减模型；第二部分为获取燃料电池混合动力汽车在实际行驶中的状态信息，主要包括车辆状态信息、燃料电池状态信息和动力电池状态信息；第三部分提出了改进多目标Double DQN算法，并基于改进多目标Double DQN算法，以燃料电池混合动力汽车的经济性、燃料电池的寿命和动力电池的寿命为目标，实现了燃料电池混合动力汽车能量管理策略的多目标优化。

摘要： 本发明提供一种低辐射漏电高压Double RESURF LDMOS器件结构，该器件包括AB、AC和AD三个不同截面结构。相比传统高压Double RESURF LDMOS器件结构，本发明在器件元胞区和非元胞区交界处的两侧，即AB和AC截面，将第一导电类型顶层结构延伸至与第一导电类型阱区相切，从而切断了辐射漏电途径，避免了总剂量辐射引起的泄漏电流增大的问题，提高了器件抗总剂量辐射能力。

摘要： 本发明公开了基于Double DQN算法的产品推荐方法及系统，包括：获取目标用户的基本信息；将目标用户的基本信息，输入到训练后的Double DQN算法中，Double DQN算法输出每个产品的预测满意度；按照预测满意度由大到小的顺序对产品进行排序，将排序后的产品推荐给目标用户。不仅分析了用户个人的信息，如个人风险偏好、收入情况等，而且充分分析了产品本身的信息，比如产品的历史购买数据、产品的购买满意度等信息，从而向该用户推荐最合适的产品。

摘要： 本发明涉及一种基于深度Double‑Q网络的Nao机器人路径规划方法，针对不确定环境，利用机器人获取的局部信息，实现在室内环境主动避障、规划路径达到设定的目标点，提高了常用的路径规划算法的泛化能力。通过对训练环境数据预处理来逼近真实场景下机器人可获取的局部环境信息以及设置合适的状态空间，动作空间和奖励函数，本方法可以直接利用获取的局部环境信息，在未知的环境中进行有效避障和路径规划，在一定程度上克服了传统算法需要获取充足的环境信息并再次进行建模、探索环境的不足，提高了算法的泛化能力，利于解决未知环境下的路径规划问题。

摘要： 本发明提供了一种基于Period‑Doubling光子晶体的光逻辑器，属于全光通讯技术领域。包括若干第一电介质层、若干第二电介质层和两个石墨烯单层，第一电介质层记为H，第二电介质层记为L，石墨烯单层记为G，光逻辑器的层状结构表示为：HLH1GH2HH2GH1LHL，其中H1GH2和H2GH1均表示石墨烯单层嵌入第一电介质层内形成的三层结构，第一电介质层和第二电介质层的厚度分别为各自光学波长的1/4，第一电介质层和第二电介质层分别为折射率高、低不同的两种均匀电介质薄片。所述基于PD光子晶体的光逻辑器可实现低阈值光学双稳态，双稳态的上、下阈值分别对应着光逻辑器的逻辑1、逻辑0的判决阈值。本发明具有能够用作光逻辑器等优点。

摘要： 本发明公开了一种基于Double DQN的改进深度强化学习方法及系统，属于强化学习领域，该方法包括以下步骤：初始化环境和DQN网络参数；基于ε‑贪婪策略进行经验积累，并将经验存入回放记忆单元；利用回放记忆单元中的样本对DQN网络进行训练优化获得决策网络。本发明方法可以提高Double Q‑Learning Network的收敛速度，并优化最终收敛值，且能减小噪声对DQN算法效果的干扰，提高深度强化学习在实际生产生活中的应用效果，扩大其应用范围。

摘要： 本发明公布了一种基于优先级随机抽样策略的Double DQN无人机隐蔽接敌方法，包括：首先，建立隐蔽接敌双方空战态势示意图，由该图建立隐蔽接敌过程的优势区域与暴露区域；其次，建立无人机的状态空间并转化为特征空间和基于速度限制的无人机动作空间；然后，构建基于优先级随机抽样策略的双深度Q学习网络；接着，根据优势区域与暴露区域中敌我双方相对位置构建目标势函数奖赏，由无人机与障碍物的距离构建障碍物奖赏，将二者叠加为总奖赏对Double DQN神经网络进行隐蔽接敌训练；最后，将无人机当前的特征序列输入至训练后的Double DQN中的Q目标神经网络，得到无人机最优隐蔽接敌策略。该方法主要解决了无人机无模型隐蔽接敌问题。

摘要： 本实用新型提供了一种基于Period‑Doubling光子晶体的光逻辑器，属于全光通讯技术领域。包括若干第一电介质层、若干第二电介质层和两个石墨烯单层，第一电介质层记为H，第二电介质层记为L，石墨烯单层记为G，光逻辑器的层状结构表示为：HLH1GH2HH2GH1LHL，其中H1GH2和H2GH1均表示石墨烯单层嵌入第一电介质层内形成的三层结构，第一电介质层和第二电介质层的厚度分别为各自光学波长的1/4，第一电介质层和第二电介质层分别为折射率高、低不同的两种均匀电介质薄片。所述基于PD光子晶体的光逻辑器可实现低阈值光学双稳态，双稳态的上、下阈值分别对应着光逻辑器的逻辑1、逻辑0的判决阈值。本实用新型具有能够用作光逻辑器等优点。

摘要： 本实用新型提供了一种基于Period‑Doubling光子晶体的全光开关，属于全光通讯技术领域。包括若干第一电介质层、若干第二电介质层和两个石墨烯单层，第一电介质层记为H，第二电介质层记为L，石墨烯单层记为G，全光开关的层状结构表示为：HL1GL2HH1GH1HL2GL1HL，其中L1GL2和L2GL1均表示石墨烯单层嵌入第二电介质层内形成的三层结构，H1GH1表示石墨烯单层嵌入第一电介质层中部形成的三层结构，第一电介质层和第二电介质层的厚度分别为各自光学波长的1/4，第一电介质层和第二电介质层分别为折射率高、低不同的两种均匀电介质薄片。本实用新型能够应用于全光开关。