Industrial utilization of arsenic-containing gold dressing tailings as pellet prepared by straight grate process

The utilization of arsenic-containing gold dressing tailings is an urgent issue faced by gold production companies worldwide.The thermodynamic analysis results indicate that ferrous arsenate(FeAsO_(4)),pyrite(FeS_(2))and sodium cyanide(NaCN)in the arsenic-containing gold metallurgical tailings can be effectively removed using straight grate process,and the removal of pyrite and sodium cyanide is basically completed during the preheating stage,while the removal of ferrous arsenate requires the roasting stage.The pellets undergo a transformation from magnetite to hematite during the preheating process,and are solidified through micro-crystalline bonding and high-temperature recrystallization of hematite(Fe_(2)O_(3))during the roasting process.Ultimately,pellets with removal rates of 80.77% for arsenic,88.78% for sulfur,and 99.88% for cyanide are obtained,as well as the iron content is 61.1% and the compressive strength is 3071 N,meeting the requirements for blast furnace burden.This study provides an industrially feasible method for treating arsenic-containing gold smelting tailings,benefiting gold production enterprises.

Antibacterial and angiogenic dual-functional fibrous membrane dressing for infected wound healing

Background:Skin,being a vital organ that regulates physiological responses in the human body,is prone to injury from external environmental factors.Healing full-thickness skin defects becomes especially challenging when infections and vascular injuries are involved.Traditional wound dressings with single functions,such as antibacterial or angiogenic properties,fall short in achieving rapid wound healing.To address this,there is a need to develop wound dressing materials that possess both effective antibacterial and angiogenic properties.Methods:In this study,we utilized electrospinning technology to fabricate hyaluronic acid-cellulose acetate fibrous membrane dressings,incorporating poly(ionic liquid)as an antibacterial polymer and deferoxamine as an angiogenic agent.Results:The resulting fibrous membrane dressing contained poly(ionic liquid)and deferoxamin showcased a microporous structure,drug-releasing capabilities,and excellent air permeability.It not only demonstrated highly effective antibacterial properties but also exhibited remarkable angiogenesis,thereby promoting the healing of full-thickness skin defect wounds in both in vitro and in vivo assays.Conclusion:These findings highlight the immense potential of this wound dressing material for future clinical applications.

Janus hydrogel/electrospun-membrane dressing enhancing wound healing in rats

Background:Excessive exudate secreted from chronic wounds often leads to overhydration and infection.Although a variety of dressings are currently available in clinical applications,they frequently fail to provide multifunction to promote chronic wound healing.The dressings with a Janus structure,featuring distinct properties on each side,are potential to improve wound healing.Methods:Composite dressings with a Janus structure were fabricated,comprising freeze-dried polycaprolactone(PCL)electrospun membrane and alginate-based hydrogel.The PCL fibrous membrane provided air permeability,while the hydrogel loaded with Deferoxamine,composed of alginate and poly(N-isopropylacrylamide)(PNIPAM),exhibited hygroscopic properties.The inclusion of PNIPAM imparted thermo-responsivity.Results:The hydrogel(thickness of 2.778±0.082 mm)exhibited a robust adhesion to the fiber membrane(thickness of 0.261±0.041 mm).For ANDC(Alginate-PNIPAM hydrogel with Deferoxamine/PCL membrane)samples,the water vapor transmission rate(WVTR)was measured to be 3364.80±23.23 g∙m−2∙day−1 and the swelling ratio at 2 h was determined to be 1179±125%.The thermo-responsivity of ANDC samples manifested in an increased swelling rate,escalating from 797±189%at 37°C to 1132±147%at 4°C.The elastic modulus was assessed for lyophilized and rehydrated ANDC sample.When theωof the rheometer rotor was decreased from 10 rad/s to 0.1 rad/s,the lyophilized dressing exhibited a decrease from 2.65±0.01 MPa to 1.80±0.90 MPa,while the rehydrated dressing demonstrated an increase from 133.65±55.68 Pa to 264.23±141.71 Pa.The pro-healing properties of the dressings were evaluated using full-thickness skin defect model on SD rats,and a circular wound of diameter 10 mm healed completely by day 12.Conclusion:The dressings not only protected the wound and absorbed excess exudate,but also demonstrated nondestructive peelability upon cooling,providing a novel approach for accelerating wound healing and management.

三能级原子Dressed态下的压缩

本文通过求解级联型三能级原子部分哈密顿量的本征值问题,得到自发辐射的级联型三能级原子的Dressed态。加入基态后,得到场方差一般表达式,并求出初始条件下的压缩最佳值。

Dressed原子与多模弱压缩光场的单光子相互作用

采用dressed原子的方法,处理了dressed原子与多模压缩光场之间的单光子相互作用。计算了各dressed原子本征态之间的跃迁速率,并讨论了在稳定时,弱光场的存在对共振荧光的影响以及dressed原子对弱光场的吸收和辐射。

双光子Dressed原子与多模压缩光场的双光子相互作用

本文采用了dressed原子的方法,处理了双光子dressed原子(以下简称dressed原子)与多模压缩光场之间的双光子相互作用,计算了各dressed原子本征态之间的跃迁速率,并讨论了在稳定时,弱无场的存在对双光子共振荧光的影响以及dressed原子对弱光场的吸收和辐射。

多光子Jaynes-Cummings模型的Dressed变换

本文应用正则Dressed变换技术,研究了多光子Jaynes—Cummings模型的本征能谱和本征函数,在此基础上,给出了这一模型的一般演化规律。

二能级原子Dressed态的非经典特性

通过精确求解二能级原子与场相互作用时的哈密顿量的本征值,得到了自发辐射下的二能级原子的Dressed态.加入基态后,用完备集来描述原子和场组成的系统.经过计算后,得到了场方差一般表达式及场的二阶相干度,并求得初始条件下的压缩最佳值.

Role of the dressed and bound states on below-threshold harmonic generation of He atom

High-order harmonic generation below ionization threshold of He atom in the laser field is investigated by solving the three-dimensional time-dependent Schrodinger equation. An angular momentum-dependent model potential of He atom was used for getting the accurate energy levels of singlet states. The satellite-peak structures of the below-threshold harmonic generation(BTHG) of He are observed. We analyze the emission properties of the BTHG by employing a synchrosqueezing transform technique. We find that the satellite-peak structures have two types related to two kinds of transitions. One is the transition of the dressed states of the excited states, the other is the transition between the excited states and the ground state in the field-free case. Furthermore, our results show that the maximum Stark shift of the 2 p state is about 0.9 Up(penderomotive energy), and that of the 4 p state is about 1.0 Up. It indicates that the energy difference between some satellite-and main-peaks of the BTHG can be used to measure the maximum Stark shift of the excited states of He atom in the laser field.

多光子泵清过程的Dressed变换及共振荧光

提出了一二能级原子的Ｋ光子（Ｋ≥３）泵溥过程的Ｄｒｅｓｓｅｄ变换方法，并研究了其振荧光现象着重讨论了三光子泵浦情形，发现其Ｄｒｅｓｓｅｄ变换式与单光子和双光子泵浦情形比较呈现出规律性，其共振荧光仍为三峰结构，但Ｄｒｅｓｓｅｄ原子的双光子荧光跃迁速率是其单光子荧光跃迁速率的四倍．

A “Dressed” Ensemble Kalman Filter Using the Hybrid Coordinate Ocean Model in the Pacific

The computational cost required by the Ensemble Kalman Filter （EnKF） is much larger than that of some simpler assimilation schemes, such as Optimal Interpolation （OI） or three-dimension variational as- similation （3DVAR）. Ensemble optimal interpolation （EnOI）, a crudely simplified implementation of EnKF, is sometimes used as a substitute in some oceanic applications and requires much less computational time than EnKF. In this paper, to compromise between computational cost and dynamic covariance, we use the idea of ＂dressing＂ a small size dynamical ensemble with a larger number of static ensembles in order to form an approximate dynamic covariance. The term ＂dressing＂ means that a dynamical ensemble seed from model runs is perturbed by adding the anomalies of some static ensembles. This dressing EnKF （DrEnKF for short） scheme is tested in assimilation of real altimetry data in the Pacific using the HYbrid Coordinate Ocean Model （HYCOM） over a four-year period. Ten dynamical ensemble seeds are each dressed by 10 static ensemble members selected from a 100-member static ensemble. Results are compared to two EnKF assimilation runs that use 10 and 100 dynamical ensemble members. Both temperature and salinity fields from the DrEnKF and the EnKF are compared to observations from Argo floats and an OI SST dataset. The results show that the DrEnKF and the 100-member EnKF yield similar root mean square errors （RMSE） at every model level. Error covariance matrices from the DrEnKF and the 100-member EnKF are also compared and show good agreement.

四能级原子共振荧光的Dressed原子模型

本文引进双重Dressed变换来研究与二强单色激光场和一弱单色激光场相互作用的四能级原子系统,通过求解荧光场算符的运动方程,得出了原子的荧光光谱分布。

Introduction of the Coulomb dressed potential into atomic scattering

The model of the Coulomb dressed potential is applied to solving the problem of electron scattering for simplifying the calculation in the electrostatic field and the excimer laser field. The introduction and the application of the model are based on the electric dipole approximation, so the contribution of the electric multipole is neglected. In this paper, rigorous analysis and deduction are carried out for the introduction of the dressed Coulomb potential into the laser field. It is found that the introduction of the dressed potential in the fractional form is feasible only when the laser field （not including far ultraviolet field and x-ray） is a weak field, i.e. the quiver radius of the free electron is smaller than the atomic scale. In addition, the necessary analysis is also conducted of the limitation of the application of the Coulomb dressed potential.

Fast achievement of quantum state transfer and distributed quantum entanglement by dressed states

We propose schemes to realize quantum state transfer and prepare quantum entanglement in coupled cavity and cavity-fiber-cavity systems,respectively,by using the dressed state method.We first give the expression of pulses shape by using dressed states and then find a group of Gaussian pulses that are easy to realize in experiment to replace the ideal pulses by curve fitting.We also study the influence of some parameters fluctuation,atomic spontaneous emission,and photon leakage on fidelity.The results show that our schemes have good robustness.Because the atoms are trapped in different cavities,it is easy to perform different operations on different atoms.The proposed schemes have the potential applications in dressed states for distributed quantum information processing tasks.

Nonlinear Jaynes-Cummings Dynamics of a Trapped Ion Under a Dressed-State Description

Introducing a dressed-state description,we show that a trapped ion in a standing wave field can be described by a nonlinear Jaynes-Cummings model different from the counterpart of Vogel and Matos Filho[Phys.Rev.A 52(1995)4214]in several aspects,which may carry important implications for the preparation and reconstruction of the nonclassical states of a trapped ion.

以DRESS综合征就诊的血管免疫母细胞性T细胞淋巴瘤一例

血管免疫母细胞性T细胞淋巴瘤(angioimmunoblastic T-cell lymphoma, AITL)是外周T细胞淋巴瘤(peripheral T cell lymphoma, PTCL)的亚型之一,占所有非霍奇金淋巴瘤(non-Hodgkin lymphoma, NHL)病例的1%~2%。某些情况下,该疾病与DRESS综合征难以鉴别,在本文中,我们报道皮损表现似DRESS综合征的老年女性AITL患者一例。

四环素类药物致DRESS综合征的文献分析

目的分析四环素类药物致伴嗜酸性粒细胞增多和系统症状的药疹综合征(DRESS综合征)的发生情况及特点,为临床安全合理用药提供参考。方法通过检索中国知网(CNKI)、万方(WanFang)、维普(VIP)、PubMed、The Cochrane Library、Embase等数据库,查找自建库至2022年11月30日期间四环素类药物导致DRESS综合征的文献,筛选出符合标准的病例进行统计和分析。结果共收集到有效文献29篇,涉及患者32例,男性9例(28.13%),女性23例(71.87%);30岁以下20例;原发疾病主要为痤疮(19例);致敏药物29例为米诺环素(90.63%),3例为多西环素(9.37%);四环素类药物致DRESS综合征的潜伏期均值为(27.35±13.76)d,24例患者在用药14 d之后出现不良反应;临床症状主要表现为皮疹、发热、面部水肿、淋巴结肿大、嗜酸性粒细胞增高及内脏受累,最常见受累的器官为肝脏(23例),其次是心脏(12例)。32例患者中21例在予以皮质内固醇等药物治疗后好转;1例好转后复发,1例好转后皮质内固醇戒断失败;6例患者死亡,其中4例死于DRESS综合征导致的心脏受累,2例死于多器官衰竭;3例患者治愈后出现自身免疫性后遗症,其中2例同时出现甲状腺功能障碍和1型糖尿病,1例出现1型糖尿病。结论四环素类药物致DRESS综合征的病死率较高,尤其是米诺环素诱发的心脏受累对患者危害极大,临床上应加强用药监测,此外DRESS综合征引发的自身免疫性疾病也需要引起关注。

An introduction to dressed-atom adiabatic potentials for ultracold atoms

We give a simple introduction to the theoretical treatment of atoms interacting strongly w ith electromagnetic fields in the radiofrequency,microw ave and laser domains. In particular,w e discuss the concept of dressed atoms,w hich considers the combination of the atom and photons as a composite physical system. This pow erful concept has a w ide range of applications in atomic physics and w e give a few examples of its use in the manipulation of ultracold atoms in adiabatic potentials. These examples are selected from experimental w ork conducted by our research team in Oxford but there are numerous other applications and w e outline some future possibilities.

超真实与内爆:拟像理论下DRESS X虚拟时尚平台的虚实关系探析

近年来,元宇宙概念的兴起带动了DRESSX虚拟时尚平台的发展,DRESSX虚拟时尚平台现已成为世界上最大的数字化服装零售平台。基于让·鲍德里亚的拟像理论,以DRESSX虚拟时尚平台为研究对象,从虚拟服装物质性消失、虚拟场景突破现实枷锁、虚拟化身仿真现实人三个维度映射超真实的现实世界。网络技术的全面渗透促使整个虚拟时尚平台发生内爆,以意义的内爆、媒介的内爆、社会的内爆三个方面消解虚实边界。最后,DRESS X虚拟时尚平台作为新兴平台,目前存在法律不健全、用户非理性消费等问题。