mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
广东省农村党员干部现代远程教育发展现状与对策建议

为落实中共中央办公厅下发的<关于在全国农村开展党员干部现代远程教育工作的意见>,我省自2007年8月启动农村党员干部现代远程教育工作,经过一年的扎实推进,广东全省已于2008年9月底完成20674个镇(乡)、行政村终端接收站点的建设,并于2009年6月底完成5797个街道、社区终端接收站点的建设,基本实现镇(乡)、行政村、街道、社区站点全覆盖;走在了全国的前列.经过近2年来的开展,我省在基础设施建设、制度建设、人员队伍建设等多方面都做出了广东的特色,形成了本地模式,但要长期运营,形成长效机制,还存在着诸多困难,针对我省远程教育发展的实际情况提出了对策建议.
池塘集约化混养观赏鲫试验

探讨了池塘集约化混养观赏鲫的产量效果和经济收益,结果表明,采用颗粒饲料进行池塘观赏鲫鱼集约化养殖,每667 m~2总产量为685 kg,其中红白鲫210 kg、蓝花鲫205 kg、鲢鳙鱼270 kg,经济收益3 723元.
2008年度广东省蚕桑产业发展现状分析

简要介绍了世界蚕桑业概况,并从规模布局、产品贸易及价格、产业化模式、科技水平等方面对广东蚕桑产业发展现状进行了分析,最后针对广东蚕桑业现状及问题,提出了若干对策建议.
竹丝鸡大肠杆菌的分离鉴定及药敏试验

对竹丝鸡的病料进行细菌分离纯化、染色镜检和生化鉴定,并利用42种抗菌药物对该细菌进行药敏试验,结果表明:从竹丝鸡病料中分离到的细菌为大肠杆菌,在42种抗菌药物中不敏感药物占28.6%、低敏药物占7.1%、中敏药物占19.0%、高敏药物占11.9%、极敏药物占33.4%.其中先锋噻肟和菌必冶对大肠杆菌最敏感.
水杨酸壳聚糖复合涂膜对芒果采后病害防治效果的研究

研究了不同浓度水杨酸壳聚糖复合涂膜对台农1号芒果采后病害的防治效果,结果表明:水杨酸壳聚精复合涂膜能够延缓芒果后熟进程,延长芒果贮藏时间,效果优于单一的壳聚糖涂膜;水杨酸壳聚糖复合涂膜对炭疽病和蒂腐病均有一定的抑制效果,在水杨酸浓度为0.5～2.0 mmol/L的条件下,随着水杨酸浓度的增加,防治效果越来越明显,其中以2.0 mmol/L水杨酸壳聚糖复合涂膜处理的效果最好,其对炭疽病和蒂腐病的防效分别为42.15%/81 87.19%,对蒂腐病的防治效果比炭疽病更明显.
水稻"三控"施肥技术在阳江市的应用效果

对2008年阳江市开展水稻"三控"施肥技术永范应用进行了总结两季多点的结果表明,与习惯施肥相比,"三控控"施肥技术平均节约肥料用量26.23%,其中,氮肥用量节约34.62%;每667 m~2竹省肥料成本20～90元.减幅14～40%;增产稻谷10～20 kg,增幅4-10%,增收节支60～130元.增幅10%～85%;产投比提高10%～30% ."三控"施肥技术增产增效的主要原因:一是有效穗数、结实率和每穗粒数均比对照增加,分别增加13.0%.5.2%和6.6%;其次是施肥时间和比例合理,肥料利用率提高.
水稻"三控"施肥技术在新会区的示范应用

2006～2007年在江门市新会区开展了水稻"三控"施肥技术的示范和推广应用结果表明,与农民习惯施肥法相比,"三控"施肥法氮、磷、钾肥施用量分别减少17.64%、38.81%和20.79%;肥料总量及其成本分别比对照减少23.56%和25.24%;增收节支20.54%,产投比提高52.88%.2年的示范推广均取得了省肥抗倒、节本增效的明显效果.为"三控"施肥技术的大面积推广应用奠定了基础.
基于有向图的约束求解新算法

针对一般几何约束系统欠约束状态下约束分解的多样性,通过对剩余自由度的分析,提出了几何元素优先级的概念,给出了约束有向图生成算法,实现了对约束系统的优化分解.本算法在AutoCAD 2000提供的二次开发接口ObjectARX上成功实现,运行结果表明具有良好的约束求解效率.对于欠约束系统的分解结果可以最大限度满足用户的需求.
PERVAPORATION OF ETHANOL/WATER MIXTURES WITH HIGH FLUX BY ZEOLITE-FILLED PDMS/PVDF COMPOSITE MEMBRANES

Thin-film zeolite-filled silicone/PVDF composite membranes were fabricated by incorporating zeolite particles into PDMS (poly(dimethylsiloxane)) membranes. The morphology of zeolite particles and zeolite filled silicone composite membranes were characterized by SEM. The zeolite-filled PDMS/PVDF composite membranes were applied for the pervaporation of ethanol/water mixtures and showed higher flux compared with that reported in literatures. The effect of zeolite loading and Si/Al ratio of zeolite particles on pervaporation performance of ethanol/water mixtures was investigated. With the increase of zeolite loading from 10% to 30%, the total flux increased significantly from 265.0 g/(m~2h) to 820.7 g/(m~2h) with 5 wt% ethanol feed concentration at 50℃, and the separation factor increased from 11.3 to 13.7. The effects of operation temperature and ethanol feed concentration on pervaporation performance were also studied. As the temperature increased from 40℃ to 80℃, the separation factor varied from 12.1 to 13.7 which maintained the maximum value at 50℃, and the total flux increased exponentially from 435.5 g/(m~2h) to 2993.8 g/(m~2h) with 30% zeolite loading. Besides, the zeolite filled PDMS/PVDF composite membrane with 30% zeolite loading was ethanol perm-selective over a wide range of ethanol feed concentration (5 wt%-90 wt%), and especially showed excellent pervaporation performance in the low concentration range.
Effect of Working Temperature on the Resistance Characteristic of a Pleated Stainless Steel Woven Filter

Effect of working temperature on the resistance characteristic including the permeability coefficient and the pressure drop evolution of a pleated stainless steel woven filter with a nominal pore size of 0.5 μm has been studied. The permeability coefficient was obtained based on the pressure drop data and the Darcy's law. In three filtration experiments, pure carbon dioxide at 283 K, nitrogen at 85 K and liquid helium at 18 K are adopted, respectively.It is found that the permeability coefficient decreases at the working temperature due to the cold shrink of the filter element at cryogenic temperature. Then, two kinds of feed slurries, mixture of liquid nitrogen and solid carbon dioxide at 85 K, and mixture of liquid helium and solid nitrogen at 18 K, flow into the filter cell. The solid particles are deposited on the filter surface to form a filter cake and the purified liquid flows through the filter. It is found that the pressure drop evolution shows the same trend on these two temperatures, which can be divided into three stages with high filtration efficiency, indicating the feasibility of the filter for cryogenic application. However, variant cake resistances are obtained, which is resulted from the different interactions between solid particles in the feed slurry at lower working temperature.
紫花苜蓿空间诱变突变体筛选及其RAPD多态性分析(简报)

空间诱变是利用微重力、高真空、强辐射等因素,对植物材料进行诱变.与传统物理诱变相比,因其具有损伤轻、诱变率高等优点,近些年已成为国内外研究热点.在经历了空间飞行后,搭载当代的部分农艺性状与地面对照具有差异,表现为株高增加、穗长增加、生育期变化等.并在SP2代更加明显,出现株高增加、生育期变化、叶形、叶色、抗病等多种变异类型.
输血前开展抗体筛选试验的重要性

卫生部于2000年在<临床输血技术规范>中明确规定:"凡有输血史、妊娠史或短期内需要接受多次输血者.输血前要进行抗体筛选试验".抗体筛选试验是用已知抗原的红细胞来检测被检者血清中是否有不规则抗体.通过输血前检查可对患者存在的不规则抗体早期发现及鉴定,避免由不规则抗体引起的输血反应,并保证及时提供相配合的血液.我们根据上述规定及地区特点,选择2007年1月至2009年3月于我院就诊的需输血的213例孕妇进行了不规则抗体检测,报告如下.
An improved HCI degradation model for a VLSI MOSFET

An improved hot carrier injection (HCI) degradation model was proposed based on interface trap gen-eration and oxide charge injection theory. It was evident that the degradation behavior of electric parameters such as I_(dlin), I_(dsat), G_m and V_t fitted well with this model. Devices were prepared with 0.35μm technology and different LDD processes, I_(dlin) and I_(dsat) after HCI stress were analyzed with the improved model. The effects of interface trap generation and oxide charge injection on device degradation were extracted, and the charge injection site could be obtained by this method. The work provides important information to device designers and process engineers.
Strain effects on the polarized optical properties of InGaN with different In compositions

Strain effects on the polarized optical properties of c-plane and m-plane In_xGa_(1-x)N were discussed for different In compositions (x = 0, 0.05, 0.10, 0.15) by analyzing the relative oscillator strength (ROS) and energy level splitting of the three transitions related to the top three valence bands (VBs). The ROS was calculated by applying the effective-mass Hamiltonian based on κ·p perturbation theory. For c-plane In_xGa_(1-x)N, it was found that the ROS of ∣X〉 and ∣Y〉-like states were superposed with each other. Especially, under compressive strain, they dominated in the top VB whose energy level also went up with strain,while the ROS of the ∣Z〉-line state decreased in the second band.For m-plane In_xGa_(1-x)N under compressive strain, the top three VBs were dominated by ∣X〉, ∣Z〉, and ∣Y〉-like states, respectively, which led to nearly linearly-polarized light emissions. For the top VB, ROS difference between∣X〉 and ∣Z〉-like states became larger with compressive strain. It was also found that such tendencies were more evident in layers with higher In compositions. As a result, there would be more TE modes in total emissions from both c-plane and m-plane InGaN with compressive strain and In content, leading to a larger polarization degree. Experimental results of luminescence from InGaN/GaN quantum wells (QWs) showed good coincidence with our calculations.
Theoretical and experimental investigations of flexural wave propagation in periodic grid structures designed with the idea of phononic crystals

The propagation characteristics of fiexural waves in periodic grid structures designed with the idea of phononic crystals are investigated by combining the Bloch theorem with the finite element method. This combined analysis yields phase constant surfaces, which predict the location and the extension of band gaps, as well as the directions and the regions of wave propagation at assigned frequencies. The predictions are validated by computation and experimental analysis of the harmonic responses of a finite structure with 11 × 11 unit cells. The fiexural wave is localized at the point of excitation in band gaps, while the directional behaviour occurs at particular frequencies in pass bands. These studies provide guidelines to designing periodic structures for vibration attenuation.
Experimental sensitivity on searching for CP violation at BES-Ⅲ

The CP violation in the D system is predicted to be an unobserved level in the Standard Model. In this paper,we describe the method of searching for CP violation decay processes with the coherently produced D~0(D)~0 mesons from the ψ(3770) decay. The CP violation decay processes can be searched for at the BES-Ⅲ experiment. The experimental sensitivity for searching for the CP violation can reach about a 10~(-4) level with a ψ(3770) data sample of about 20 fb~(-1)
Multiparty quantum secret conference based on quantum encryption with pure entangled states

We present a scheme for multiparty quantum remote secret conference (MQRSC) with pure entangled states, not maximally entangled multipartite quantum systems. The conferees first share a private quantum key, a sequence of pure entangled states and then use them to encode and decode the secret messages. The conferees exploit the decoy-photon technique to ensure the security of the transmission of qubits. This MQRSC scheme is more feasible and efficient than others.
Almost Fixed Point, Fixed Point and Quasi-Variational Inequality on Generalized Convex Spaces

The definitions of S-KKM property and F-invariable property for multi-valued mapping are established, and by which, a new almost fixed point theorem and several fixed point theorems on Haudorff locally G-convex uniform space are obtained, and a quasi-variational in-equality theorem for acyclic map on Hausdorff φ-space is proved. Our results improve and generalize the corresponding results in recent literatures.
Two-Parameter Weak Hopf Algebras Corresponding to Borcherds-Cartan Matrix

In this paper a class of two-parameter weak Hopf algebras ω~T_(r,s)(g) corresponding to Borcherds-Cartan matrix is constructed. This class consists of noncommutative and noncocom-mutative weak Hopf algebras but not Hopf algebras. It can be viewed as a generalized class of one-parameter weak Hopf algebras ωUq(g).
On CAP-Embedded Subgroups in Finite Groups

A subgroup H of a finite group G is said to be CAP-embedded subgroup of G if, for each prime p dividing the order of H, there exists a CAP-subgroup K of G such that a Sylow p-subgroup of H is also a Sylow p-subgroup of K. In this paper some new results are obtained based on the assumption that some subgroups of prime power order have the CAP-embedded property in the group.
糖尿病肢体动脉闭塞症股动脉内-中膜厚度、血流速度及脉动指数与中医证型的相关性研究

糖尿病肢体动脉闭塞症(diabetic arteniosclerosis obliterons, DAO)是糖尿病合并下肢动脉闭塞性疾病,是造成糖尿病患者肢体坏死、截肢的主要原因.2007年1月-2008年3月,我们对100例DAO患者进行股总动脉IMT等相关彩超指标的检测,并探讨这些指标与DAO中医辨证分型的相关性,以期为DAO中医辨证客观化提供依据.
声致振动下铝板的实验模态分析与参数辨识

对于大型航天器的太阳能帆板,在自由-自由悬挂条件下,由于结构本身的超低频、大位移和局部模态丰富等特点,常规的激励方式有着各种各样的缺点,如:模态识别结果置信度降低,局部模态占优,系统稳定性差等.基于这些困难,针对大型航天器的太阳能帆板的模态分析试验背景,提出一种非接触式声致振动激励方法,设计并构造了矩形铝板承受扬声器激励的实验模型和参数辨识算法,针对实测响应数据进行模态分析,并将其与传统激励方式下的模态分析结果进行对比.该结果对太阳能帆板等大型航天器的模态实验设计与参数识别具有指导意义.
电子耳蜗CIS法的仿真建模

基于滤波器组分频的波形策略是电子耳蜗语音处理策略中重要的一类方案.利用Matlab中的Simulink建模工具,对该策略的连续交替采样算法(Continuous Interleaved Sampling Approach CIS)进行简化建模仿真.并根据汉语频率范围和硬件实现的要求,对算法中关键部分滤波器组分频模块进行改进.最后通过仿真直观地验证该模型的合理性与可靠性.
重组人血管内皮抑制素联合DP方案治疗晚期非小细胞肺癌的临床研究

肺癌是最常见的恶性肿瘤之一,早期诊断很困难,70%～80%的非小细胞肺癌(non small cell lung cancer, NSCLC)确诊时已属晚期.晚期NSCLC的治疗主要以全身化疗为主,尽管第3代细胞毒药物(如吉西他滨、长春瑞滨和多西他赛等)联合铂类药物治疗晚期NSCLC的疗效有所提高,但患者的5年生存率仍然偏低,生存获益仍然有限.
杂交籼稻昌丰优1286高产配套栽培技术

昌丰优1286系中国水稻研究所用昌丰A与中恢1286配组选育而成的优质杂交晚籼稻新组合.栽培试验结果表明,昌丰优1286在浙江金华作单季晚稻种植,以5月25日播种、移栽密度16.5万穴/hm~2、氮肥用量折纯N 240 kg/hm~2较为适宜.提出了其高产配套栽培技术.
杂交粳稻制种父本花期延迟措施的效应分析

对杂交粳稻辽优5215制种中父本花期延迟措施的效应进行了研究,结果表明:在父本幼穗分化Ⅲ期采取控水、增N、施用多效唑、割叶等多种措施可以延缓父本幼穗分化进程,最大可延迟花期7 d左右;单项措施的调花效果为割叶>施多效唑>增N>排水,排水效果不明显;多项措施的累加效应大于单项措施的效应,但其总效应小于各单项措施效应之和;过量增施N肥导致旺长效应,割叶、施多效唑皆对父本植株高度和单株颖花数有显著负向影响,过量增施多效唑易导致颖花退化,造成穗顶部秃尖,割叶、施多效唑与增施N肥结合有互补效应.
对2007版两个噪声职业卫生标准的几点看法

2007年修订(颁布)了两个噪声方面的职业卫生标准.其中"职业卫生接触限值"GBZ2.2-2007与GBZ2-2002相比,增加了职业噪声接触限值标准;"工作场所物理因素测量第8部分:噪声"GBZ/T189.8-2007中增加了噪声个体暴露测量评价方面的说明.
紫癜性肾炎的诊治:《儿童常见肾脏疾病诊治循证指南(试行)》解读(二)

2008年中华医学会儿科学分会肾脏病学组在紫癜性肾炎原有诊疗常规的基础上,参考国内外最新研究证据,按照循证医学的原则,制定了<紫癜性肾炎的诊治循证指南(试行)>.就该指南中的主要内容,结合2008年11月在西安召开的"全国儿科常见肾脏病诊治指南专题研讨会"专家们提出的意见和建议,解读如下.
海外植物药的质量标准——对中药标准化的一些启示

随着天然药物在全球的兴起,植物药的质量控制受到越来越多的关注.本研究主要介绍了海外包括欧洲、美国、日本、印度,中国台湾等国家或地区的植物药质量标准.海外植物药质量标准主要分为两类:药典和专论.不同国家和地区使用植物药的程度不同,对其质量控制的理念也不一致,所制定标准的条目和规定的检测限量也各不相同.通过介绍海外植物药标准的版本和内容,比较这些标准的差异,为制定和完善中药质量标准提供借鉴意义,亦为中药进入国际市场提供参考.
菜籽粕品质指标变化规律及相互关系研究

考察了经不同加热条件处理的菜籽粕蛋白质溶解度(PS)、中性洗涤纤维(NDF)含量以及体外消化率(PDIV)3项品质指标变化规律,同时建立了PS、NDF含量与PDIV之间的回归预测模型.结果表明:①100 ℃对PS及NDF含量没有影响,2 h内的热处理PDIV逐渐升高;140 ℃下处理5 h,PS、NDF含量均降到标准以下,即菜籽粕品质遭到破坏;160 ℃处理1 h就会对菜籽粕品质产生破坏性作用.②温度、时间均对3项指标产生影响,但温度的影响程度要远大于时间.③菜籽粕的PS、NDF含量与其PDIV之间具有很强的相关性.
超前全麻插管在抢救非手术危重患者中的作用

气管插管是抢救危重患者的重要手段,但因插管时机及方法不妥往往直接影响危重患者抢救效果.本院于2005年1月-2008年12月在抢救危重患者时随着病情发展在超前全麻下行气管内插管40例,采用机械通气辅助治疗取得了满意的临床效果,现总结如下.
Luminescence Properties of Nanostructure ZnO-Covered Carbon Fibers Prepared by Thermal Oxidation

We report on ZnO nanosheets and nanorods synthesized by thermal oxidation of zinc films deposited on carbon fiber surfaces. The structure and optical properties are characterized by x-ray diffraction, scanning electron microscopy and photoluminescence spectrum. An orange-red emission around 683 nm is found in the PL spectrum when the sample prepars at 400℃ for four hours in air. With annealing temperature increasing from 400℃ to 500℃, the blue shift is observed.
Effect of Zr Addition on Glass-Forming Ability and Magnetic Properties of Fe-Nd-Al-B Alloys Prepared by Suction Casting

The microstructure and magnetic behaviors of the Fe-Nd-Al-B alloys prepared by suction casting with zirconium addition are investigated. With the small amount of zirconium addition, the magnetic properties of the alloys change from hard magnetic property to soft magnetic property. The proper addition of Zr (6%) not only improves the glass forming ability, but also suppresses the crystallization. From the scanning electron microscopy of the [(Fe_(0.53)Nd_(0.37)Al_(0.10))_(0.96)B_(0.04)]_(94)Zr_6 alloy and the local average elemental compositions determined using energy dispersive spectroscopy analysis, the amorphous phase with a composition of Fe_(47)Nd_(38)Al_(12)Zr_3 in the alloy can be observed. The bulk amorphous Fe_(47)Nd_(38)Al_(12)Zr_3 alloy is prepared by suction casting exhibiting good glassforming ability and soft magnetic behavior.
Integratable and High Speed Complex-Coupled MQW-DFB Lasers Fabricated on Semi-Insulating Substrates

A novel integratable and high speed InGaAsP multi-quantum well (MQW) complex-coupled distributed feedback (DFB) laser is successfully fabricated on a semi-insulating substrate. The fabricated ridge DFB laser exhibits a threshold current of 26 mA, a slope efficiency of 0. 14 W.A~(-1) and a side mode suppression ratio of 40 dB together with a 3 dB bandwidth of more than 8 GHz. The device is suitable for 10 Gbit/s optical fiber communication.
Characterization of ZnO nanowire field-effect transistors exposed to ultraviolet radiation

A ZnO nanowire (NW) field-effect transistor (FET) is fabricated and characterized, and its characterization of ultraviolet radiation is also investigated. On the one hand, when the radiation time is 5 min, the radiation intensity increases to 5.1 μW/cm~2, while the saturation drain current (I_(dss)) of the nanowire FET decreases sharply from 560 to 320 nA. The field effect mobility (μ) of the ZnO nanowire FET drops from 50.17 to 23.82 cm~2/(V·) at V_(DS)=2.5 V,and the channel resistivity of the FET increases by a factor of 2. On the other hand, when the radiation intensity is 2.5 μW/cm~2, the DC performance of the FET does not change significantly with irradiation time (its performances at irradiation times of 5 and 20 min are almost the same); in particular, the I_(dss) of NW FET only reduces by about 50 nA. Research is underway to reveal the intrinsic properties of suspended ZnO nanowires and to explore their device applications.
Crystal structure and magnetic properties of Nd(Mn_(1-x)Fe_x)_2Si_2 compounds

X-ray powder diffraction, resistivity and magnetization studies have been performed on polyerystalline Nd(Fe_xMn_(1-x))_2Si_2(0≤x≤1) compounds which crystallize in a ThCr_2Si_2-type structure with the space group 14/mmm. The field-cooled temperature dependence of the magnetization curves shows that, at low temperatures, NdFe_2Si_2 is antiferromagnetic, while the other compounds show ferromagnetic behaviour. The substitution of Fe for Mn leads to a decrease in lattice parameters a, c and unit-cell volume V. The Curie temperature of the compounds first increases, reaches a maximum around x = 0.7, then decreases with Fe content. However, the saturation magnetization decreases monotonically with increasing Fe content. This Fe concentration dependent magnetization of Nd(Fe_xMn_(1-x))_2Si_2 compounds can be well explained by taking into account the complex effect on magnetic properties due to the substitution of Mn by Fe. The temperature's square dependence on electrical resistivity indicates that the curve of Nd(Fe_(0.6)Mn_(0.4))_2Si_2 has a quasi-linear character above its Curie temperature, which is typical of simple metals.
Photon-added and photon-subtracted displaced Fock states and their non-classical properties

A new kind of quantum optical state, photon-added and -subtracted displaced Fock states, is introduced by applying the inverse of bosonic creation and annihilation operators to displaced Fock states. The quantum statistical properties of these states are investigated by numerical methods. Numerical results indicate that these states reveal some interesting non-classical properties, such as anti-bunching effects, sub-Poisson distributions and negativities of their Wigner functions.
Effects of bulk viscosity on hadron spectra and the Hanbury-Brown Twiss radius by causal viscous hydrodynamics

The particle spectra and Hanbury-Brown Twiss (HBT) radius of Au+Au collisions at RHIC energy are investigated by a hydrodynamical expanding source with both shear and bulk viscosities (ζ). With a large width of the ratio of ζ to entropy density s, both the particle transverse momentum spectra and the ratio R_(out)/R_(side) of HBT radii in the direction of the total transverse momentum of detected two particles (R_(out)) and perpendicular to both this direction and the beam direction (R_(side)) become a little steeper.
Interactions of chirped femtosecond soliton-like pulses

This paper studies the interactions between two and more adjacent chirped soliton-like pulses, respectively. The results show that the pulses present strong interactions when the separations between them are smaller than a certain value, and their behaviour is very distinct under different conditions, such as a different number of pulses or different initial separations between them. Furthermore, we also study the suppression of these interactions and obtain very good effects by using different initial amplitude ratios.
Effects of optical interference and annealing on the performance of poly (3-hexylthiophene):fullerene based solar cells

In this paper, the effects of optical interference and annealing on the performance of P3HT:PCBM based organic solar cells are studied in detail. Due to the optical interference effect, short circuit current density (J_(SC)) shows obvious oscillatory behaviour with the variation of active layer thickness. With the help of the simulated results, the devices are optimized around the first two optical interference peaks. It is found that the optimized thicknesses are 80 and 208 nm. The study on the effect of annealing on the performance indicates that post-annealing is more favourable than pre-annealing. Based on post-annealing, different annealing temperatures are tested. The optimized annealing condition is 160℃ for 10 min in a nitrogen atmosphere. The device shows that the open circuit voltage V_(OC) achieves about 0.65V and the power conversion efficiency is as high as 4. 0% around the second interference peak.
Analysis of ferroresonance in a neutral grounding system with nonlinear core loss

The chaotic behaviour exhibited by a typical ferroresonant circuit in a neutral grounding system is investigated in this paper. In most earlier ferroresonance studies the core loss of the power transformer was neglected or represented by a linear resistance. However, this is not always true. In this paper the core loss of the power transformer is modelled by a third order series in voltage and the magnetization characteristics of the transformer are modelled by an 11th order two-term polynomial. Extensive simulations are carried out to analyse the effect of nonlinear core loss on transformer ferroresonance. A detailed analysis of simulation results demonstrates that, with the nonlinear core loss model used, the onset of chaos appears at a larger source voltage and the transient duration is shorter.
The principle of the Internet evolving and a conjecture on the optimal structure of the Internet

In this paper we will give the statistical characteristics and general principles of an optimal structure of the Internet, which is a scale-free network. Since the purpose of the Internet is to allow fast and easy communication, the average path length is used to measure the performance of the network, and the number of edges of the network is used as a metric of its cost. Based on this, the goal of this Internet optimization problem is to obtain the highest performance with the lowest cost. A multi goal optimization problem is proposed to model this problem. By using two empirical formulas of 〈k〉 and 〈l〉, we are able to find the statistical characteristics of the optimal structure. There is a critical power law exponent α_c for the Internet with power law degree distribution, at which the Internet can obtain a relatively good performance with a low cost. We find that this α_c is approximately 2. 1.
Localized states of flattened quantum elliptic rings and their optical properties

A flattened elliptic ring containing an electron is studied.The emphasis is placed on clarifying the effect of the flattening.The localized states are classified into four types according to their inherent nodes.When the ring becomes more flattened,the total probability of dipole absorption of each state is found to be reduced.Furthermore,each spectral line of absorption is found to shift towards red and may split into a few lines,and these lines as a whole become more diffusive.
Ultra-thin a-SiN_x protective overcoats for hard disks and read/write heads

This paper reports that amorphous silicon nitride(α-SiN_x)overcoats were deposited at room temperature by microwave ECR plasma enhanced unbalanced magnetron sputtering.The 2 nm α-SiN_x overcoat has better anti-corrosion properties than that of reference α-CN_x overcoats(2-4.5 nm).The superior anti-corrosion performance is attributed to its stoichiomctric bond structure,where 94.8% Si atoms form Si-N asymmetric stretching vibration bonds.The N/Si ratio is 1.33 as in the stoichiometry of Si_3N_4 and corresponds to the highest hardness of 25.0 GPa.The surface is atomically smooth with RMS＜0.2 nm.The ultra-thin α-SiN_x overcoats are promising for hard disks and read/write heads protective coatings.
Controlling chaos in permanent magnet synchronous motor based on finite-time stability theory

This paper reports that the performance of permanent magnet synchronous motor(PMSM)degrades due to chaos when its systemic parameters fall into a certain area.To control the undesirable chaos in PMSM,a nonlinear controller,which is simple and easy to be constructed,is presented to achieve finite-time chaos control based on the finite-time stability theory.Computer simulation results show that the proposed controller is very effective.The obtained results may help to maintain the industrial servo driven system's security operation.