field

摘要： Plasma Science and Technology(PST)journal assists in advancing plasma science and technology by reporting important,novel,helpful and thought-provoking progress in this strongly multidisciplinary and interdisciplinary field,in a timely manner.This field encompasses foundational plasma phenomena;low-temperature plasmas;magnetically confined plasmas.

摘要： We present a Stark–Zeeman spectral line-shape model and the associated numerical code,PPPB,designed to provide fast and accurate line shapes for arbitrary atomic systems for a large range of plasma conditions.PPPB is based on the coupling of the PPP code-a Stark-broadened spectral line-shape code developed for multi-electron ion spectroscopy in hot dense plasmas-and the MASCB code developed recently to generate B-field-dependent atomic physics.The latter provides energy levels,statistical weights,and reduced matrix elements of multi-electron radiators by diagonalizing the atomic Hamiltonian that includes the well know B-dependent term.These are then used as inputs to PPP working in the standard line-broadening approach,i.e.,using the quasi-static ion and impact electron approximations.The effects of ion dynamics are introduced by means of the frequency fluctuation model,and the physical model of electron broadening is based on the semi-classical impact approximation including the effects of a strong collision term,interference,and cyclotron motion.Finally,to account for polarization effects,the output profiles are calculated for a given angle of observation with respect to the direction of the magnetic field.The potential of this model is presented through Stark–Zeeman spectral line-shape calculations performed for various experimental conditions.

摘要： As most people acknowledges,the toothpaste market already has been occupied by a great number of strong players and can be considered an increasingly deadly battlefield.However,for a market that is large enough,with expanding categories and rising consumption,there are many new opportunities in the oral care market.Momentum determines kinetic energy,as long as you seize the opportunity,precise attack,a latecomer can also tap strong brand potential,to seize the marketing high ground.For new dental brands in particular,only strong potential can generate development of marketing and strong marketing momentum.By harnessing the strong potential,you can strategically reach the overall brand marketing height,to achieve marketing victory across the field.

摘要： Collisionless shocks are ubiquitous in the Universe and are held responsible for the production of nonthermal particles and high-energy radiation.In the absence of particle collisions in the system,theory shows that the interaction of an expanding plasma with a pre-existing electromagnetic structure(as in our case)is able to induce energy dissipation and allow shock formation.Shock formation can alternatively take place when two plasmas interact,through microscopic instabilities inducing electromagnetic fields that are able in turn to mediate energy dissipation and shock formation.Using our platform in which we couple a rapidly expanding plasma induced by high-power lasers(JLF/Titan at LLNL and LULI2000)with high-strength magnetic fields,we have investigated the generation of a magnetized collisionless shock and the associated particle energization.We have characterized the shock as being collisionless and supercritical.We report here on measurements of the plasma density and temperature,the electromagnetic field structures,and the particle energization in the experiments,under various conditions of ambient plasma and magnetic field.We have also modeled the formation of the shocks using macroscopic hydrodynamic simulations and the associated particle acceleration using kinetic particle-in-cell simulations.As a companion paper to Yao et al.[Nat.Phys.17,1177–1182(2021)],here we show additional results of the experiments and simulations,providing more information to allow their reproduction and to demonstrate the robustness of our interpretation of the proton energization mechanism as being shock surfing acceleration.

摘要： 首先,请看下列句子,体会rice与相应的汉语词的对比。(1)Farmers grow rice in the paddy field.(水稻)(2)Farmers harvest rice when it is ripe.(稻谷)(3)I would like to buy some rice in the market.(大米)(4)The rice cooked by Mom is really delicious.(米饭)以上四句中的rice,在汉语中分别由“稻~谷~米~饭”四个不同的词表示。

摘要： Using a time-dependent density functional theory method,we perform a systematic numerical study of the transition of high-order harmonic generation in neon(Ne)systems from an isolated Ne atom to an extended Ne system of solid density.We show that ionized electrons wander in such extended systems until they meet a nearby ion and collide with it.The maximum energy edge for the main feature of the high-order harmonic spectrum in this“wandering electron”picture is determined as Eedge=Ip+8Up,where Ip is the ionization energy of Ne and Up is the ponderomotive energy delivered by the driving laser.The factor of 8 comes from the maximum kinetic energy of an ionized electron in the driving laser field.Beyond the atomic limit of high-order harmonic spectra,a multiplatform feature is observed,corresponding to re-collisions of ionized electrons with their nearby ions.It is also shown that a Ne simple cubic lattice of appropriate size provides a selection condition for the direction of polarization of high-order harmonics beyond the atomic limit,which may be further used to manipulate the emitted radiation.

摘要： “I want to work at my picture,”the boy said,and went into the field.The lttle sister went too,and stood by him watching while he painted.“我想画我的画。”男孩说道,然后走进田野。他的妹妹也走进了田野,站在他旁边看着他画画。

摘要： China has become a truly geo-economic meridian of the globe,reverberating in practically every field.And the 20th CPC National Congress showed an accordingly self-confident spirit ahead.

摘要： Timing Box,a perfume brand in China,wrapped up its Pre-A financing with the investor as Shanghai Jahwa.This was also the first time that Shanghai Jahwa ventured into this field.With the support of Shanghai Jahwa’s fund and resources,Timing Box would improve its brand,source and patent storage.According to Shanghai Jahwa,it would empower Timing Box in an all-round and customized manner.It would also promote the joint growth of the brand and its rebirth.

摘要： 基于field map对fMRI中的几何畸变伪影进行校正的方法，多通道相控阵线圈图像(幅值图和相位图)的重建，对幅值图进行分割做掩膜、对相位图进行相位去卷绕，field map的生成，field map的去噪声，生成体素位移图和进行几何畸变校正；在field map去噪声的过程中，依据噪声来源不同，分别采用腐蚀的幅值图做掩膜去除边缘噪声和用去尖峰、中值滤波和高斯平滑方法去除内部噪声，两种方法的结合有效的去除了field map的噪声，利用field map对功能磁共振图像的校正效果明显，简单高效，具有很高的信噪比，能很好地改善其图像品质。

摘要： 本发明提供了一种针对redis hash类型数据控制field过期的方法及系统，包括：步骤S1：设置过期时间单位，并设置过期时间值的字符串长度；步骤S2：设置用于过期判断的基准时间，将基准时间对应的时间值定义为0值；步骤S3：根据过期时间值的字符串长度、基准时间以及当前时间计算期望的hash field的过期时间值；步骤S4：将过期时间值的字符串的长度补齐至设置的过期时间值的字符串长度，得到新的过期值字符串；步骤S5：将新过期值字符串与value以字符串类型拼接得到新value，新value作为hash value存储至redis中；步骤S6：定时扫描redis的hash value值，当当前时间与基准时间的差值大于hash value中提取的过期时间值，则对field进行删除操作。

摘要： 本发明公开了对Redis hash的每个field进行过期管理的方法，包括：将Redis Client封装到自定义JhRedis系统；调用自定义JhRedis系统判断当前key是否有对应的SortedSet，若无，则为所述当前key创建一个SortedSet，其member等于所述当前key的field，score为field的过期时间，再向SortedSet中写入数据；调用自定义JhRedis系统读取当前field的SortedSet，判断其score是否过期，若过期，则自动清理关于当前field的数据，返回空数据，若未过期，则返回value。本发明能实现对每个field的过期管理。

摘要： 基于field map对fMRI中的几何畸变伪影进行校正的方法，多通道相控阵线圈图像(幅值图和相位图)的重建，对幅值图进行分割做掩膜、对相位图进行相位去卷绕，field map的生成，field map的去噪声，生成体素位移图和进行几何畸变校正；在field map去噪声的过程中，依据噪声来源不同，分别采用腐蚀的幅值图做掩膜去除边缘噪声和用去尖峰、中值滤波和高斯平滑方法去除内部噪声，两种方法的结合有效的去除了field map的噪声，利用field map对功能磁共振图像的校正效果明显，简单高效，具有很高的信噪比，能很好地改善其图像品质。

摘要： 本发明公开了一种提高信号完整性的pin field出线设计方法，具体实现过程为，在芯片下方信号pin分布的区域pin field区域的出线端，将攻击信号远离受害信号，降低高速信号间的串扰，所述攻击信号为噪声源所在的信号，受害信号为有噪声产生的信号。该一种提高信号完整性的pin field出线设计方法与现有技术相比，在pinfield出线端采用攻击信号远离受害信号、增加GND过孔设计，使得pinfield出线端的串扰尽可能的降低，达到提高信号完整性的目的，实用性强。