Interface and energy band manipulation of Bi2O3-Bi2S3 electrode enabling advanced magnesium-ion storage

Rechargeable magnesium-ion(Mg-ion)batteries have attracted wide attention for energy storage.However,magnesium anode is still limited by the irreversible Mg plating/stripping procedure.Herein,a well-designed binary Bi_(2)O_(3)-Bi_(2)S_(3)(BO-BS)heterostructure is fulfilled by virtue of the cooperative interface and energy band engineering targeted fast Mg-ion storage.The built-in electronic field resulting from the asymmetrical electron distribution at the interface of electron-rich S center at Bi_(2)S_(3) side and electron-poor O center at Bi_(2)O_(3) side effectively accelerates the electrochemical reaction kinetics in the Mg-ion battery system.Moreover,the as-designed heterogenous interface also benefits to maintaining the electrode integrity.With these advantages,the BO-BS electrode displays a remarkable capacity of 150.36 mAh g^(−1) at 0.67 A g^(-1) and a superior cycling stability.This investigation would offer novel insights into the rational design of functional heterogenous electrode materials targeted the fast reaction kinetics for energy storage systems.

Unifying the theory of integration within normal-,Weyl- and antinormal-ordering of operators and the s-ordered operator expansion formula of density operators

By introducing the s-parameterized generalized Wigner operator into phase-space quantum mechanics we invent the technique of integration within s-ordered product of operators （which considers normally ordered, antinormally ordered and Weyl ordered product of operators as its special cases）. The s-ordered operator expansion （denoted by s…s ） formula of density operators is derived, which isρ=2/1-s∫d^2β/π〈-β｜ρ｜β〉sexp{2/s-1（s｜β｜^2-β＊α＋βa-αα）}s The s-parameterized quantization scheme is thus completely established.

A Study on S.R.Topography of the Structural Defects in High-J_c Superconducting YBaCuO Crystal Prepared by the MTG Technique

It is well known that for technological application,a great effort has been done to enchance Jvalue ofsuperconducting YBaCuO sintered bulk.Except oxygen content,the main problem for increasing critical cur-rent density Jis to eliminate the weak link and to control crystallographic anisotropy.It is necessary tomake YBaCuO superconducting bulk have a strong texture with C-axis orientation.Since Jin et al.has suc-

基于3S一体化技术的鹿泉市土地利用动态监测

该文采用 3S一体化技术建立了鹿泉市土地利用动态监测系统。依靠GPS对空间数据快速定位 ,RS数据发现土地动态变化区域 ,再利用GIS平台进行空间数据组织、管理、分析与可视化。据此 ,分析 1986～ 1996年鹿泉市土地利用动态变化情况。

3S技术在农业及相关领域的应用与发展

围绕3S技术在农业及相关领域的应用,以其在贵州省农业及相关领域的应用实例与发展,探讨了3S技术的实际应用状况。分析了3S技术在应用中存在的主要问题,提出其发展趋势,为其它行业更好的利用3S技术提供参考和依据。

3S技术在土地利用更新调查中的应用

3S技术构成的动态对地观测体系为土地利用更新调查提供了坚实的技术支撑。在江西余干县的土地利用更新调查中,应用3S集成技术,设计合理的技术流程,解决实施过程中的关键问题,高效精确的完成项目,最终得到与实地相一致的成果资料和土地利用现状数据库,为土地数字化动态管理提供了基础资料。

3“S”技术在油田环境监测管理中的应用前景

在综合分析的基础上,对3“S”技术在油田环境监测管理中的应用前景进行了论述。指出:3“S”信息技术能对油田环境动态监测管理的信息获取、处理和应用等问题做出分析;可方便迅速地完成对环境数据的获取,实现对油田环境的监测、预测评价,对污染源、污染排放和污染效果等环境信息的科学管理和分析工作;在油田的环境监测管理中,具有重要的现实意义和广阔的应用前景。

LD2000 System with 3S and Multi-sensor

This paper introduces a car_borne road information collecting and updating system (LD2000) developed by Wuhan Technical University of Surveying and Mapping.This system is capable of collecting road network information and creating digital road network effectively by means of GPS,GIS and multi_sensor integration.The design and development of LD2000 system are also presented in this paper.

基于3S集成的矿产资源成矿预测研究

矿产资源是重要的自然资源,是社会生产发展的物质基础,关系着人们的生产和生活。随着地球科学领域数字空间数据的迅速增长,3S技术成为矿产资源领域真正的需求。同时GIS、GPS、RS等高新技术的普及应用为成矿预测展示了新的前景。文中主要介绍如何实现用3S集成技术进行矿产资源预测。

溶胶-凝胶制备技术与新型催化材料 Ⅱ.γ-Al_2O_3陶瓷膜制备中浇铸与膜的完整性

溶胶－凝胶技术用来制备中孔γ－Ａｌ２Ｏ３陶瓷膜，并考察了浇铸条件对膜完整性的影响。溶胶浓度大于１．５ｍｏｌ／Ｌ后，溶胶浓度的增加使溶胶粘度增大；溶胶中的有机添加剂会改变溶胶的粘度，随着溶胶中添加剂含量的增加，溶胶的粘度增大。由此研究了三种配方的浆料对膜完整性的影响，其中溶胶浓度与有机添加剂的含量成反比。用溶胶浓度０．５～０．８ｍｏｌ／Ｌ，添加剂的质量分数为３％～４．５％的浆料可制得无裂缺的γ－Ａｌ２Ｏ３陶瓷膜。多次烧铸可改善陶瓷膜的完整性。

陕芝3号芝麻新品种的选育及配套栽培技术

陕芝 3号是用冀芝 1号作母本 ,子洲芝麻作父本 ,通过杂交选育成的旱地芝麻新品种。该品种属单秆型 ,一叶三花 ,籽粒白色 ,生育期 95d ,抗旱、抗病性强 ,平均比对照增产 13.9%以上。同时根据渭北旱原土壤、气候特点 ,针对陕芝 3号进行良种良法高产优质配套栽培技术研究 ,提出了保苗、适宜密度、施肥、打顶等高产优质配套技术措施。

复杂曲面有色金属3维激光拼焊的跟踪控制研究

为实现复杂曲面有色金属高功率激光拼焊过程中3维拼缝的精确跟踪,采用拼缝实时测量并进行拼缝形变动态补偿的方法,开展了基于7轴联动的3维拼缝焊接-测量一体化控制算法和关键技术的研究,包括运动控制数学模型、焊接与测量路径规划、焊接过程的实时检测与动态补偿等,并用4kW光纤激光器进行了厚度3mm以下有色金属焊接试验,验证了所提出的算法。结果表明,研究的3维拼缝焊接-测量一体化控制系统能够快速、准确地实现3维拼缝的实时焊接与动态补偿,满足3维焊接的跟踪控制精度要求。

Effect of JIN's 3-needle technique and motor function trai-ning on upper extremities motor recovery of cerebral apoplexy induced hemiplegia

Objective To observe the clinical effects on upper extremities function recovery of cerebral apoplexy induced hemiplegia by combination of JIN＇s 3-needle technique and motor function trai- ning. Methods Eight-seven cases of cerebral apoplexy induced hemiplegia were randomized into an observation group （44 cases） and a control group （43 cases）. JIN＇s 3-needle technique and motor function training were both adopted for the observation group. Three temporal acupuncture points on the affected side were selected. Three lower arm points, namely Qfichi （曲池 LI 11 ）, Waiguan （外关 TE 5） and Hegu （ 合谷 LI 4） were adopted for flaccid hemiplegia. While 3 upper arm points for relieving spasm, namely Jiquan （极泉HT 1）, Chize （尺泽 LU 5） and Neiguan （内关 PC 6） were chosen for spastic hemiplegia. Motor function training was applied alone for the control group. Treating courses for both groups were 5 weeks. And scores of Brunnstrom and FugI-Meyer assessments of the affected limbs were analyzed. Results Improvement on scores of FugI-Meyer and Brunnstrom assessments were observed for both groups after the treatment（P〈0. 05, P〈0. 01 ）. The post-treatment scores of the observation group was better than that of the control group after the treatment （ P〈0.05, P〈0.01 ）. Conclusion Treat- ment of combination of JIN＇s 3-needle technique with motor function training can obviously improve the motor function of the upper extremities of patients with cerebral apoplexy induced hemiplegia.

基于T-S模型的非线性时滞系统的模糊控制

研究了(Takagi-Sugeno,T-S)模糊模型描述的非线性时滞系统的稳定性分析和控制器设计问题。首先,选取一个新的积分不等式用以处理求导Lyapunov-Krasovskii泛函所得的积分项,进而提出了保守性较小的时滞依赖稳定性条件。其次,结合Finsler引理,以线性矩阵不等式(LMIs)形式给出了基于并行分布补偿(PDC)技术的模糊状态反馈控制器设计策略。最后,给出2个仿真实例用以证明给出的稳定性分析和控制策略的有效性。

The N-mode squeezed state with enhanced squeezing

It is known that exp [iA （Q] P1 - i/2）] is a unitary single-mode squeezing operator, where Q1, P1 are the coordinate and momentum operators, respectively. In this paper we employ Dirac＇s coordinate representation to prove that the exponential operator Sn ≡exp[iλi=1∑n（QiPi＋1＋Qi＋1Pi））],（Qn＋1=Q1,Pn＋1=P1）,is an n-mode squeezing operator which enhances the standard squeezing. By virtue of the technique of integration within an ordered product of operators we derive Sn＇s normally ordered expansion and obtain new n-mode squeezed vacuum states, its Wigner function is calculated by using the Weyl ordering invariance under similar transformations.

Study on Landscape Pattern Based on Landsat-8 in the Center of Chengdu City, China

Study on landscape spatial pattern in the center of Chengdu City is based on the Landsat-8 image by using 3S technique and spatial pattern analysis software Fragstats 3.3. The results showed that there covered an area of 193.92 km2 in the center of Chengdu City. 55.24% of the total area was made up of buildings, covering an area of 107.12 km2, and the overall landscape of impervious ground-based. There were 22,666 patches;29.67% of the patches were roads. The human interference of buildings, roads and green space was a maximum;fragmentation of the highest was green space. The fragmentation of overall urban landscape was high;the diversity was low;the value of Shannon’s diversity index was 0.63;the value of Shannon’s evenness index was 0.70. All kinds of landscape distribution were not balanced, and lack of connectivity. This research puts important reference for creating good urban landscape space and restoring the natural ecological environment in the western regions of China.

基于D-S证据理论和不同子神经网络集成的磨粒识别

针对磨粒识别问题,建立了基于D-S证据理论的集成神经网络磨粒融合诊断方法。首先对特征参数进行优化分组,然后对每一组建立对应的分类子神经网络,分别采用径向基函数(RBF)神经网络和反向传播(BP)神经网络进行识别,得到初步的诊断结果,经过归一化后作为2组基本概率分配函数,最后运用D-S证据理论进行融合得到最终识别结果。算例分析表明,基于D-S证据法和集成神经网络的磨粒融合识别方法比单个诊断方法具有更高的准确性。

Efficient thermal dissipation in wafer-scale heterogeneous integration of single-crystalline𝛽β-Ga_(2)O_(3)thin film on SiC

The semiconductor,β-Ga_(2)O_(3)is attractive for applications in high power electronic devices with low conduction loss due to its ultra-wide bandgap(∼4.9 eV)and large Baliga’s figure of merit.However,the thermal conductivity of𝛽β-Ga_(2)O_(3)is much lower than that of other wide/ultra-wide bandgap semiconductors,such as SiC and GaN,which results in the deterioration of𝛽β-Ga_(2)O_(3)-based device performance and reliability due to self-heating.To overcome this problem,a scalable thermal management strategy was proposed by heterogeneously integrating wafer-scale single-crystalline𝛽β-Ga_(2)O_(3)thin films on a highly thermally conductive SiC substrate.Characterization of the transferred𝛽β-Ga_(2)O_(3)thin film indicated a uniform thickness to within±2.01%,a smooth surface with a roughness of 0.2 nm,and good crystalline quality with an X-ray rocking curves(XRC)full width at half maximum of 80 arcsec.Transient thermoreflectance measurements were employed to investigate the thermal properties.The thermal performance of the fabricated𝛽β-Ga_(2)O_(3)/SiC heterostructure was effectively improved in comparison with that of the𝛽β-Ga_(2)O_(3)bulk wafer,and the effective thermal boundary resistance could be further reduced to 7.5 m 2 K/GW by a post-annealing process.Schottky barrier diodes(SBDs)were fabricated on both a𝛽β-Ga_(2)O_(3)/SiC heterostructured material and a𝛽β-Ga_(2)O_(3)bulk wafer.Infrared thermal imaging revealed the temperature increase of the SBDs on𝛽β-Ga_(2)O_(3)/SiC to be one quarter that on the𝛽β-Ga_(2)O_(3)bulk wafer with the same applied power,which suggests that the combination of the𝛽-Ga_(2)O_(3)thin film and SiC substrate with high thermal conductivity promotes heat dissipation in𝛽β-Ga_(2)O_(3)-based devices.

不具强制性条件的Hammerstein积分方程的解

在自反Ｂａｎａｃｈ空问的框架下建立了极大单调且３＊—单调算子的一个值域定理，用此定理并注意到Ｎｅｍｙｃｋｉｌ算子的３＊—单调性，在空间Ｌｐ（Ｇ）（１＜Ｐ＜∞，ＧＲｎ有界开）中证明了不具强制性条件的Ｈａｍｍｅｒｓｔｅｉｎ积分方程解的存在性。

The s-parameterized Weyl-Wigner correspondence in the entangled form and its applications

Based on the theory of integration within s-ordering of operators and the bipartite entangled state representation we introduce s-parameterized Weyl-Wigner correspondence in the entangled form. Some of its applications in quantum optics theory are presented as well.