An aqueous BiI_(3)-Zn battery with dual mechanisms of Zn^(2+)(de)intercalation and I^(-)/I_(2)redox

The development of aqueous battery with dual mechanisms is now arousing more and more interest.The dual mechanisms of Zn^(2+)(de)intercalation and I^(-)/I_(2)redox bring unexpected effects.Herein,differing from previous studies using Zn I_(2)additive,this work designs an aqueous Bi I_(3)-Zn battery with selfsupplied I^(-).Ex situ tests reveal the conversion of Bi I_(3)into Bi(discharge)and Bi OI(charge)at the 1st cycle and the dissolved I^(-)in electrolyte.The active I^(-)species enhances the specific capacity and discharge medium voltage of electrode as well as improves the generation of Zn dendrite and by-product.Furthermore,the porous hard carbon is introduced to enhance the electronic/ionic conductivity and adsorb iodine species,proven by experimental and theoretical studies.Accordingly,the well-designed Bi I_(3)-Zn battery delivers a high reversible capacity of 182 m A h g^(-1)at 0.2 A g^(-1),an excellent rate capability with 88 m A h g^(-1)at 10 A g^(-1),and an impressive cyclability with 63%capacity retention over 20 K cycles at 10 A g^(-1).An excellent electrochemical performance is obtained even at a high mass loading of 6 mg cm^(-2).Moreover,a flexible quasi-solid-state Bi I_(3)-Zn battery exhibits satisfactory battery performances.This work provides a new idea for designing high-performance aqueous battery with dual mechanisms.

高职“化工生产安全责任与技术应用”课程的改革实践--基于德国职业教育“双元制”的推广与尝试

基于德国职业教育“双元制”教育模式,通过重构专业课程内容,确定行动领域目标,优化教学实施过程,开发有企业针对性的教学资料,促进课堂教学。结合我国高职院校实际情况,本文对“化工生产安全责任与技术应用”课程进行教学改革。在“责任关怀”行动领域目标的框架内,打破原有的教学课堂、教学内容、教学模式壁垒,实施教学全过程,推动化工专业人才培养模式的发展,为高职院校课程质量的提高提供借鉴。

Dual-doping for enhancing chemical stability of functional anionic units in sulfide for high-performance all-solid-state lithium batteries

The sulfide-based solid-state electrolytes(SEs)reactivity toward moisture and Li-metal are huge barriers that impede their large-scale manufactu ring and applications in all-solid-state lithium batteries(ASSLBs).Herein,we proposed an Al and O dual-doped strategy for Li_(3)PS_(4)SE to regulate the chemical/electrochemical stability of anionic PS_(4)^(3-)tetrahedra to mitigate structural hydrolysis and parasitic reactions at the SE/Li interface.The optimized Li_(3.08)A_(10.04)P_(0.96)S_(3.92)O_(0.08)SE presents the highestσLi+of 3.27 mS cm^(-1),which is~6.8 times higher than the pristine Li_(3)PS_(4)and excellently inhibits the structural hydrolysis for~25 min@25%humidity at RT.DFT calculations confirmed that the enhanced chemical stability was revealed to the intrinsically stable entities,e.g.,POS33-units.Moreover,Li_(3.08)Al_(0.04)P_(0.96)S_(3.92)O_(0.08)SE cycled stably in Li//Li symmetric cell over 1000 h@0.1 mA cm^(-2)/0.1 mA h cm^(-2),could be revealed to Li-Al alloy and Li_(2)Oat SE/Li interface impeding the growth of Li-dendrites during cycling.Resultantly,LNO@LCO/Li_(3.08)Al_(0.04)P_(0.96)S_(3.92)O_(0.08)/Li-In cell delivered initial discharge capacities of 129.8 mA h g^(-1)and 83.74%capacity retention over 300 cycles@0.2 C at RT.Moreover,the Li_(3.08)Al_(0.04)P_(0.96)S_(3.92)O_(0.08)SE presented>90%capacity retention over 200 and 300 cycles when the cell was tested with LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2)(NCA)cathode material vs.5 and 10 mg cm^(-2)@RT.

STUDY ON ANTIBACTERIAL ACTION OF 4-[P-ACETYLAMINO]BENZENESULFONAMIDOL SELENOMORPHOLINE BY MICROCALORIMETRY

Antibacterial action of 4-[p-acetylamino benzenesulfonamido] selenomorpholine (SeB) was studied by microcalorimetry with an LKB-2277 Bioactivity Moni-tor. It was found that SeB had the capacity to inhibit the metabolic growth of Escherichia coli. But in different sol-vent, the extent of inhibition is different. Removing the effect of solvent, we obtained the half-inhibition conce.ntra-tion(IC50) of SeB from the power-time curves. The value of IC50 of SeB was 1319μg ·mL-1.

The complicated life of a physician-soldier: Medical readiness training exercises &the problem of dual loyalties

While physicians are generally understood as owing moral obligation to the health and well being of their individual patients, military health professionals can face ethical tensions between responsibilities to individual patients and responsibilities to the military mission. The conflicting obligations of the two roles held by the physician-soldier are often referred to as the problem of dual loyalties and have long been a topic of debate. This paper seeks to enrich the dualloyalties debate by examining the embedded case study of medical civilian assistance programs. These programs represent the use of medicine within the military for strategic goals. Thus, a physician is expected to meet his obligation to his role as a soldier while also practicing medicine. These programs involve obligations inherent in both roles of the physician-soldier and thusly they serve as excellent exemplars for the problem of dual loyalties at an institutional level. This paper focuses on Medical Readiness Training Exercises (MEDRETEs). These programs are short-term, generally taking place in low-income nations in order to accomplish strategic goals including training opportunities for military medical professionals that are not possible on the home front. This form of temporary program raises ethical concerns regarding the exploitation of vulnerable populations and the value of what is termed “parachute medicine”. The short-term nature of these interventions makes long-term treatment and follow-up impossible, begging the question as to whether this peak and trough approach to foreign civilian aid is of any use. Physicians are generally understood as having obligations towards the well being of the patient, which these programs do not necessarily prioritize. Rather, the programmatic intent is military, with political and strategic aims of furthering international relations, increasing US military global presence and providing austere and tropical training opportunities for military healthcare providers. This can be morally problematic for the physician-soldier.

Bis(1-(4-(dimethylamino)benzylidene)-4-phenylthiose micarbaznato)palladium(Ⅱ):Synthesis,Crystal Structure and Its Dual Fluorescence Property

The title compound bis（1-（4-（dimethylamino）benzylidene）-4-phenylthiosemicar-bazato）-palladium（Ⅱ）（PdL2） was obtained by reacting 1-（4-（dimethylamino）benzylidene）-4-phenyl-thiosemicarbazide with dichlorobis（benzonitrile）palladium（Ⅱ） in methanol,and its structure was characterized by single-crystal X-ray diffraction.The crystal of PdL2 was obtained in dimethyl-formamide（DMF） solvent with solvent molecules involved in the cell and crystallizes in the monoclinic system,space group C2 with a = 18.485（15）,b = 7.090（5）,c = 17.595（11） ,β = 121.21（3）o,V = 1972（2） 3,Z = 2,Mr = 847.40,Dc = 1.427 g/cm3,μ = 0.624 mm-1,F（000） = 880,R = 0.0607 and wR = 0.1358.The Pd atom adopts a distorted square planar coordination geometry with two Pd-N and two Pd-S bonds.The ligand loses a proton from its tautomeric thiol form and coordinates to the Pd atom via mercapto sulfur and the imine nitrogen atom,which binds to palladium as bidentate N,S-donors forming five-membered chelate rings.The complex formed hydrogen bonding interaction with solvent DMF molecules from the hydrogen of phenylamine to the oxygen of DMF and several intramolecular hydrogen bonds.Pd（Ⅱ） perturbed ligand π-π＊ transition and metal-to-ligand charge transfer（MLCT） transition are observed in its electronic absorption spectra.The complex exhibits intraligand 1π-π＊（IL） state and MLCT state dual fluorescent emissions in organic solvent at room temperature.

2D Coupled 3D:A New Numerical Model for Dual - Structured - Aquifer System

This paper points out that a successful numerical simulation is to construct a correct conceptional model which is very dose to the natural condition. A new model, two dimensional coupled three dimensional model (2D -3D ) is presented in the Present paper,which is the most suitable one for the dual - structured - aquifer system. An example of Wenyinghu area is shown.By using the 2D-3D model, a satisfied result of the simulated area is achieved.

CHINA: MAIN GEODETIC ACTIONS 1996-2000

This article reviews the progress made in geodetic work in China since the 1980s.In order to meet the needs of China’s economic and defense construction,and scientific and social development in the early 21th century,some main geodetic actions which should be completed before 2000 are proposed as follows.(1) Monitoring vertical crustal movements and conducting studies on its mechanism.Releveling of the second phase of the national first order leveling network.Computation of the vertical crustal movement.(2) Improvement of national space geodetic network.The main task is to lay down a national B-order GPS network and complete its data processing.(3) Refining of Chinese local gravity field on land and sea.The determination of Chinese local quasi geoid with higher than one meter accuracy.Application of

基于深层动态特征双流网络的高效行为识别算法

为了更高效地获得视频中的行为信息,提出一种结合时域卷积与双流卷积网络的人体行为识别算法。利用多层时域卷积从视频获取动态信息,得到二维的深层动态特征;构建双流卷积网络并采用深层动态特征代替光流特征作为运动信息流的输入;加权融合双流结果,获得对行为的判定。在公开数据集UCF101、HMDB51与NTU-RGBD-60测试,最高准确率为94.2%、70.9%与89.1%(跨对象实验)。当与经典算法ECO(Efficient Convolutional Network)和TSM(Temporal Shift Module)准确率相近时,平均并行速度分别提高2.1倍和3.6倍。所研究算法提高了计算效率,更具有实用性。

教育家精神引领下“双师型”教师自主发展路径探索——王阳明“知行合一”思想的当代启示

教育家精神是引领职教教师专业发展的崇高精神内核,是职业教育培养大国工匠、高技能人才的关键。“双师型”教师所强调的理论与实践相结合的理念以及“双师型”教师自主专业发展中的“教师主体性”与王阳明的“知行合一”思想具有高度一致性。运用王阳明“知行合一”思想,对当前“双师型”教师自我专业发展中存在的专业信念缺失、主体动力不足、学用知行脱节、反省反思不足、教学智慧缺乏等问题进行归因;在王阳明思想中“为己-克己-成己”的个人成长进路的启示下,探索出“双师型”教师“志业-敬业-乐业”的自我专业发展进路,形成以“立志为先”铸就信念之魂、以“心之本体”激活主体动力、以“知行一体”提升理实结合能力、以“省察克治”践行自我革命精神、以“事上磨练”促进职教智慧生成、以“万物一体”心境引领职教发展,完成教育家型职教教师自我实现的专业发展路径。

热力耦合作用对TAC-1B和TC11合金焊接界面硬度和显微组织的影响

研究了金属间化合物TAC-1B与钛合金TC11经真空电子束焊接后,在不同规范的热力耦合作用下,焊接界面元素扩散变化趋势和焊缝区的显微组织变化。研究结果表明,直接焊接的试样,焊缝处元素Al、Nb含量发生突然变化;经热力耦合作用后焊缝处元素Al、Nb从浓度高的一侧向浓度低的一侧发生连续的扩散,元素Mo的变化不大。在热模变形20%并经680℃保温12h,空冷处理后的试样,焊接界面显微硬度最高,HV0.98平均值为3853.4MPa。焊缝及焊缝两侧的热影响区内的高倍组织随变形程度增大而逐渐细化。

一种面向宽带跳频双动作的智能抗干扰决策算法

宽带跳频与深度强化学习结合的智能跳频通信模式能有效提高通信抗干扰能力。针对同时调整信号频点和功率的双动作空间智能决策由于频点离散但功率非离散使得决策依赖的深度强化学习算法难以设计的问题,基于离散型深度确定性策略梯度算法(Wolpertinger Deep Deterministic Policy Gradient,W-DDPG),提出了一种适于宽带跳频通信且具有发射频率和功率组成的双动作空间智能抗干扰决策方法。该决策方法面向频率/功率双动作空间,在频率空间中使用Wolpertinger架构处理频率动作,并与功率动作组成联合动作,然后使用DDPG算法进行训练,使该算法能够适用于宽带跳频双动作空间的抗干扰场景,在复杂的电磁环境下能够快速作出决策。仿真结果表明,该方法在宽带跳频双动作空间干扰模式下的收敛速度及抗干扰性能较传统抗干扰算法提升了大约25%。

融合空间-时间双网络流和视觉注意的人体行为识别

该文受人脑视觉感知机理启发,在深度学习框架下提出融合时空双网络流和视觉注意的行为识别方法。首先,采用由粗到细Lucas-Kanade估计法逐帧提取视频中人体运动的光流特征。然后,利用预训练模型微调的GoogLeNet神经网络分别逐层卷积并聚合给定时间窗口视频中外观图像和相应光流特征。接着,利用长短时记忆多层递归网络交叉感知即得含高层显著结构的时空流语义特征序列;解码时间窗口内互相依赖的隐状态;输出空间流视觉特征描述和视频窗口中每帧标签概率分布。其次,利用相对熵计算时间维每帧注意力置信度,并融合空间网络流感知序列标签概率分布。最后,利用softmax分类视频中行为类别。实验结果表明,与其他现有方法相比,该文行为识别方法在分类准确度上具有显著优势。

职业学校毕业生就业制度存在的问题及对策--基于双证书制度的思考

高级别证书的价值未能体现、持同样的职业资格证书却不能进同性质的用人单位、工资福利待遇低是目前职校毕业生就业制度存在的问题。存在以上问题的根本原因是我国尚未确立学历文凭、职业资格两种证书并重的制度。在市场经济条件下,政府应通过保障就业机会均等、给予职业教育更多的关注等举措确立两种证书并重的毕业生就业制度。

某热电联产电厂双机组跳闸事故分析及解决措施

电网系统发生线路外部破坏事故时,某热电联产电厂双机组同时跳闸,引发全厂停电及1台锅炉发生干锅事故。对比两侧保护动作情况列出动作时序图,分析机组跳闸原因,提出解决措施。全面提高了该热电联产电厂机组的运行可靠性,降低了线路外部发生破坏事故时对电厂及电力系统的影响,保证了电力系统安全稳定运行。

Clarke-Ekeland-Lasry共轭作用原理与Ekeland指标理论

作者在文章中研究了著名的ＣｌａｒｋｅＥｋｅｌａｎｄＬａｓｒｙ共轭作用原理，探讨了在凸Ｈａｍｉｌｔｏｎ系统的周期解存在的问题。

论输气站场UPS三级防雷系统的保护

通过分析国内天然气企业的用电现状和陕京四线无人站南山分输站的外电设计要求及UPS使用现实情况,提出天然气站场的UPS防雷系统设计改进建议,推进站场安全管理和UPS运行的安全运行条件,从技术层面做到专业安全管理和设备本质安全水平。切实做到消除事故隐患,保证施工运行安全。

“双网格化”何以赋能基层社会治理——基于“组织—技术—行动”的分析

“双网格化”是对传统网格化管理的迭代升级,也是基层社会治理转型的必然要求。“双网格化”治理体系从组织、技术与行动三个维度发力,助力基层社会治理。组织层面,以多元主体的引入和赋能形成“一核多元”的主体结构破解原本基层社会治理“孤军奋战”的能力困境;技术层面,充分利用数字技术打破行政壁垒,连接“信息孤岛”,引领基层社会的整体性治理,利用数字技术赋能治理主体,撬动基层社会参与式治理;行动层面,完善“网格吹哨、部门报到”的机制,实现基层社会治理过程中的上下联动、左右协同,切实提升基层社会治理的实践效能。“双网格化”通过构建虚拟网格和实体网格,联动化解风险、提供服务,有效维护了社会秩序、提高了公共服务供给的效率并且成为构建共建共治共享社会治理格局的重要助推力。

MRTP:时间-动作感知的多尺度时间序列实时行为识别方法

针对行为识别中时空信息分布不均衡以及对长时间跨度信息表征获取难的问题,提出了一种时间-动作感知的多尺度时间序列实时行为识别方法MRTP。以RGB视频为输入,使用两个并行的感知路径在不同的时间分辨率上对视频进行空间特征与动作特征提取。在空间路径中,使用基于特征差分的动作感知寻找并加强通道动作特征表征;在动作路径中,基于动作感知的权重对通道进行筛选,并加入通道注意力和时间注意力加强关键特征;在两个路径提取出特征后,对特征进行融合,融合后的特征通过激活函数映射出样本在各个类别的得分,取得分最高的类别为最终识别结果。实验结果表明:所提方法在UCF101数据集上达到了95.6%的准确率,优于未使用时间注意力的方法;在AVA2.2数据集上的平均精度达到了28%,优于未使用动作感知和时间注意力的方法。与目前主流的基于光流法的双流网络、以Slowfast为代表的3D卷积网络、Transformer等方法进行了准确率、参数量、处理速度对比,结果表明所提方法具有更良好的识别效果和鲁棒性。