Study on the pollution of the air environment and Its Countermeasures during the Spring Festival: take Yuhang District Hangzhou City as example

中国作为一个传统大国，历来都有在春节燃放烟花爆竹的习惯。近几年来，随着广大人民群众对环境的日益关注，烟花爆竹的燃放有所减少，但仍然对环境造成了一定的影响。按照余杭区2013年-2015年大年三十小时均值来看，PM10和PM2.5为余杭区的首要污染物，其中PM10的最高值出现在2013年的0︰00，浓度达到1.039mg/m3，PM2.5的最高值出现在2013年的1︰00，浓度达到0.568mg/m3；按照余杭区2013年-2015年农历十二月二十六至正月十四共计十八日日均值来看，SO2的最高值出现在2013年的正月初十，浓度达到0.36mg/m3，NOX的最高值出现在2014年的十二月二十八，...As a traditional country, China has always had a habit of setting off fireworks and firecrackers during the Spring Festival. In recent years, with the increasing attention of people to the environment, the discharge of fireworks has been reduced, but still has a certain impact on the environment.According to the hour average of Lunar December 30 2013 -2015 in Yuhang District, PM2.5 and PM10 are th...学位：公共管理硕士院系专业：公共事务学院_公共管理硕士学号：1392012115025

Status on the diagnosis and treatment of BK virus infection

BK病毒（BKV）属于人类多瘤病毒中的一个亚型。BKV在普通人群中隐性感染率高达80%。近年来,随着器官移植术的广泛开展以及强效免疫抑制剂的大量使用,在免疫抑制和免疫低下的人群中,由潜伏于体内的BKV重新被激活而引起的BKV相关肾病（BKVAN）、出血性膀胱炎、输尿管狭窄等疾病越来越受到医学界的关注。目前对BKV感染缺乏明确有效的预防措施及抗病毒药物,因此早期监测器官移植术后患者体内的BKV载量、减少免疫抑制剂的使用量、及时调整免疫抑制剂治疗方案并辅助使用其他抗病毒药物对预防BKV相关疾病的发生尤为重要。文章就BKV感染相关的疾病及其临床症状、生物学特征、感染机制以及当前国内外诊断及治疗研究现状进行综述。BK virus （BKV） belongs to a subtype of human polyomavirus. Recessive infection rate of BKV in general population is about 80%. With expanded use of organ transplantation in recent years where strong immunosuppression is essential,BKV associated nephropathy（BKVAN）,hemorrhagic cystitis,ureterostenosis and other associated diseases due to the reactivation of latent BKV in immunosuppressed or immunocompromised populations are becoming more of a concern in medical community. Since the prevention measures and effective antiviral drugs for BKV are rather limited,the effective means for reducing BK associated morbidity and mortality due to BKV associated diseases are the early monitoring of viral loads,reducing the usage of immunosuppressant,adjusting immunosuppressant treatment regime and using adjuvant therapies. This review describes the clinical symptoms,biology,mechanisms and the advances in the diagnosis and treatment of BKV at home and abroad

大规模定制电子商务的组合策略自动谈判研究

为了满足消费者的个性化需求,同时减少消费支出,将大规模定制理论同电子商务实践相结合,构建电子商务环境下大规模定制运营模型。基于Agent技术的自动谈判理论,探究适用于多属性谈判的谈判策略,即不学习的固定策略和学习策略;并将学习对手策略与微小让步区间策略相结合,形成组合策略用以指导Agent谈判出价。通过对比3种策略的效果实验证明,这种组合应用不同策略的方法,更加有利于双方达到双赢的局面,提高谈判效率,从而促进定制化电子商务走向实际应用。国家自然科学基金资助项目(71671154)国家留学基金委公派访问学者资助项目(201706315032)中央高校科研业务费山海基金资助项目(20720161052

Supramolecular Helical Chirality of Schiff Base Copper(II) Complexes and Their Chiroptical Spectroscopy

本文通过不同的手性二胺(pn = 1,2-丙二胺、chxn = 1,2-环己二胺、dpen =; 1,2-二苯基乙二胺)与脱氢乙酸(dha)缩合,获得了N_2O_2型手性席夫碱配体(dha-en),进而合成了相应的三对手性席夫碱Cu(II)络; 合物([Cu(dha-R/S-pn)](1a和1b)、[Cu(dha-R,R/S,S-chxn)](2a和2b)、[Cu(dha-R,R/S,S; -dpen)](3a和3b),对其进行的固体和溶液电子圆二色(ECD)及溶液振动圆二色(VCD)光谱测试表明,这些化合物在固体和溶液状态下的金属; 中心的主要配位模式和绝对构型基本一致。此外,通过单晶结构分析发现:对于络合物2a/2b以及3a/3b,中心金属Cu(II)除了与手性dha-en; 四齿配位外,还与相邻分子内酯环上的羰基发生弱的轴向配位形成一维超分子螺旋链,即实现了配位键构筑的席夫碱络合物的手性超分子自组装。本文对两对手性络; 合物2a/2b以及3a/3b的手性结构基元及其与超分子螺旋之间的关系进行了讨论。将本文所获实验VCD光谱数据与文献报道的相关数据进行比对分析,可; 以相互印证,并呈现一定的绝对构型关联规律且具有手性配位立体化学结构的指纹特征。Three pairs of N2O2-type Schiff base ligands were synthesized by condensing dehydroacetic acid (dha) with chiral 1,2-diaminopropane (pn), trans-1,2-diaminocyclohexane (chxn), and 1,2-diphenylethylenediamine (dpen). These chiral ligands were used to coordinate copper(II) ions to produce the corresponding Schiff base Cu(II) complexes: [Cu(dha-R/S-pn)] (1a and 1b), [Cu(dha-R,R/S,S-chxn)] (2a and 2b), and [Cu(dha-R,R/S,S-dpen)] (3a and 3b). Detailed analyses using electronic circular dichroism (ECD) and vibrational circular dichroism (VCD) spectroscopies reveal that these Schiff base Cu(II) complexes retain the main coordination modes and the absolute configurations of the metal centers, both in solution and the solid state. In addition, according to the crystal structures, the central Cu(II) ions of 2a/2b and 3a/3b were found to not only coordinate to the chiral dha-en ligands, but were also axially coordinated to the carbonyl groups of the contiguous lactonic rings, providing one-dimensional supramolecular helical chains through self-assembly. In this work, we deeply studied the relationship between the chiral coordination units and the supramolecular helical structures of 2a/2b and 3a/3b. By comparing our experiment VCD spectroscopic data with related VCD spectral features reported in the literature, a specific correlation between the VCD spectral properties and absolute configurations was investigated, which provided fingerprint characteristics for chiral coordination structure.National Natural Science Foundation of China [21273175

Current Efficiency and Deposit Microhardness of Nickel-Tungsten Alloy Electrodeposition

通过调节镀液中不同的 nI/ W 比例、温度和沉积电流密度，研究在焦磷酸盐体系中镍钨合金电沉积的电流效率、沉积层组成和显微硬度。实验结果表明：合金共沉积的电流效率不高。为了尽量提高合金的沉积电流效率，主要途径宜增大镀液中硫酸镍和钨酸钠的浓度；提高合金沉积电流密度，降低镀液中［ nI］/［ W］ 比例，则镀层中的钨含量增大；合金沉积层的显微硬度随镀层中的 W 含量提高而增大。Current efficiency, deposit composition and microhardness of nickel-tungsten alloy electrodeposition in pyrophosphorus bath were studied by adjusting Ni/W ratio in plating solution, temperature and deposition current density.The results showed that the current efficiency of the alloy codeposition was not high.For the purpose to raise current efficiency as far as possible the suitable solution was to increase the concentration of nickel sulfate and sodium tungstate in the bath, Tungsten content in the alloy deposit can be increased by raising electrodeposition current density and decreasing [Ni]/[W] ratio in the plating solution.The microhardness of the alloy deposit increases with the raise of tungsten content in the deposit.国家自然科学基

HYDROTHERMAL SYNTHESIS AND MAGNETIC PROPERTIES OF NANOSIZED NICKEL ZINC FERRITE POWDER

用水热法分别在200℃和220℃下反应5h制备了纳米级镍锌铁氧体(Ni0.5Zn0.5Fe2O4)粉体。用X射线衍射(X-ray diffraction,XRD)分析合成的纳米Ni0.5Zn0.5Fe2O4的物相,结果表明:200℃水热反应5h得到的纳米Ni0.5Zn0.5Fe2O4粉体中含有γ-Fe2O3,220℃水热反应5h可以得到纯纳米Ni0.5Zn0.5Fe2O4粉体。用透射电镜(transmission electronmicroscope,TEM)、Mssbauer谱(Mssbauer spectroscopy,MS)、Fourier红外分析(Fourier transform infrared spectroscopy,FTIR)、振动样品磁强计(vibrating sample magnetometer,VSM)等方法表征纯纳米Ni0.5Zn0.5Fe2O4粉体。TEM结果表明:纳米Ni0.5Zn0.5Fe2O4粉体粒子为球形,粒径约为20nm。室温MS结果表明:大部分纳米Ni0.5Zn0.5Fe2O4粉体粒子表现出铁磁性,少量的表现出超顺磁性。FTIR分析表明:样品在577cm-1和420cm-1处出现NiZn铁氧体的特征峰。磁滞回线结果表明:纳米Ni0.5Zn0.5Fe2O4粉体粒子的饱和磁化强度为38.14A?m2/kg,剩磁为17.32A?m2/kg,矫顽力为29275.29A/m。Nanosized nickel zinc ferrite(Ni0.5Zn0.5Fe2O4)powder was synthesized by the hydrothermal synthesis method at 200℃ and 220 ℃for 5h,respectively.An X-ray diffraction(XRD)was adopted for the characterization of Ni0.5Zn0.5Fe2O4 powder.It is concluded that the Ni0.5Zn0.5Fe2O4 powder containedγ-Fe2O3 when it is synthesized at 200 ℃for 5h,and pure Ni0.5Zn0.5Fe2O4 powder were prepared by the hydrothermal synthesis at 220 ℃for 5h.The pure powder was characterized by a transmission electron micro-scope(TEM),Mssbauer spectrum(MS),Fourier transform spectroscopy(FTIR),and magnometry using a vibrating sample magne-tometer(VSM).The TEM results show that Ni0.5Zn0.5Fe2O4 nanoparticles are round,and are about 20 nm in diameter.The MS results reveal that most of the Ni0.5Zn0.5Fe2O4 nanoparticles show ferromagnetism and a small quantity of Ni0.5Zn0.5Fe2O4 exhibit superpara-magnetic relaxation.The FTIR results show that the bands at 577 cm-1 and 420 cm-1 are the characteristic bands of NiZn ferrite.The saturated magnetization,remanence and coercivity of Ni0.5Zn0.5Fe2O4 powder are 38.14 A·m2/kg,17.32 A·m2/kg and 29 275.29 A/m,respectively.The powder exhibits good magnetic properties.深圳大学科研(4CHQ)资助项

High Performance Liquid Chromatography-Inductively Coupled Plasma-Mass Spectrometry for the Determination of Arsenic Content and Speciation in Enteromorpha

使用高效液相色谱-电感耦合等离子体质谱(HPlC-ICP-MS)联用技术对浒苔中的砷总量及其存在的化学形态进行分析。总量分析结果表明,青岛海域的浒苔样品中砷总量介于3.0~9.7μg/g之间。在总量测定的基础上,对浒苔样品的水煮提取液进行形态分析。结果表明,浒苔中主要含有无机五价砷和一种疑为砷糖的物质以及少量的二甲基胂酸(dMA)和无机三价砷。鉴于这些砷形态的毒性或潜在毒性,将其应用于食品及药物方面尚需谨慎。This study analyzed arsenic content and speciation in Enteromorpha sampled from various coastal zones of Qindao using high performance liquid chromatography coupled to inductively coupled plasma-mass spectrometry(HPLC-ICP-MS).The results showed that the total arsenic content in Enteromorpha was ranged from 3.0 to 9.7 μg/g.The speciation analysis of hot water extract of Enteromorpha indicated that the major arsenic forms in Enteromorpha were inorganic quinquevalence arsenate and a substance suspected as arsenic sugar.Besides,there were small amounts of inorganic trivalence arsenite and dimethylarsenate(DMA) in the extract.Due to the toxicity or potential toxicity of these arsenic forms,it should be paid great caution in the application of Enteromorpha as a material for food and medicine.国家自然科学基金项目(20675021);海洋一所基本科研专项(GY-022008T32

STUDY ON THE PROCESS of COPPER ELECTRODEPOSITION ON PLATINUM (111)

采用0.001MOl/lCuSO4＋0.5MOl/lH2SO4溶液体系，在PT单晶球电极作循环伏安曲线，得到Cu存在欠电位沉积和本体沉积两个阶段，利用电化学扫描隧道显微镜观察到在欠电位下Cu在PT（111）面上为单层平面生长，本体沉积为三维岛状生长，并随过电位升高，Cu的成核数目增加.用反射电子显微镜法也观察到高过电位时在PT（111）面上的岛状铜.证实了Cu在PT（111）面上的STrAnSkI—krASTAnOV生长机理C-V curves of copper electrodeposition on Pt(111) showed that there were two stages of underpotential and bulk deposition For copper electrodeposition process.Single layer growth at underpotential deposition and three dimensional nucleation growth at bulk deposition had been in situ observed by electrochemical scanning tunneling microscopy (ECSTM) at diFFerent potentials and times.The reFlection electron microscopy (REM) images also revealed three dimensional growth of Cu deposition at high overpotential.All of these results demonstrated Stranski-Krastanov growth mechanism of copper on Pt(111).国家自然科学基金!59471060;厦门大学固体表面物理化学国家重点实验室、中国科学院原子核分析研究室资

Dual action axial pressing type conductive slip ring

本发明为相对机械运动电力信号传输装置，其结构由动环组件、静环组件、弹性支座和转动轴组成，动组件为电刷组件，根据电流大小可大小不同，静组件为导环组件，与动环组件依次相隔，外面为套筒，静组件侧面装有导杆，动环两侧装有弹簧支座，中间为转动轴，所有动环引出之导线全部由转动轴键槽引出。动环组件与静环组件都可相对移动，优点是结构简单，工作稳定可靠，可在各种环境中使用

道具创新与冰上杂技舞台探讨——以中国首部仿冰杂技剧《冰雪梦蝶秀》为例

大连杂技团2016年启动创作,2017年荣膺国家艺术基金项目资助,历时两年多创编的中国首部仿冰杂技剧《冰雪梦蝶秀》,于2018年国庆节前后在大连上演。该剧由大连杂技团和大连亚得利文化传播有限公司联合出品。仿冰杂技剧《冰雪梦蝶秀》是首次在国内杂技舞台创新使用高科技仿冰板技术,仿冰与真冰相似度达90%,非真冰、不用电、无排放,免除制冰流程,节能减排,适用于多种场地,拆装简便、巡演便捷。对国内冰上杂技而言,该剧以"高科技仿“广西民族文化传承与保护研究中心”建设经费资助； 2017国家社科艺术学基金项目“中国当代杂技创作研究”(17BE093)的阶段性成