等环的

Since 2000, the project I had/have been responsible for include:Health Effects of Fine/Ultrafine particles in ambient air of Beijing founded by Natural Science Foundation China and also cooperated with GSF, Germany; Energy Selection and Health Benefits in Beijing and China funded by IES program of USEPA, Study of Environmental Cost Model in China funded by USEPA, Risk Assessment for health Effects of Biological Indoor Air Pollutants and outdoor air pollution funded by China Ministry of Science and Technology; Health Effects of Fine Particles from the Dust Storms in China funded by NSFC and also cooperated with NIER, South Korea, etc.?

目前有在读的博士生2人、硕士生6人，MPH5人。主要研究方向为室内外空气污染对人群健康影响的定量评价及方法、环境污染健康风险评价及方法学。目前主持承担的科研项目有：国家自然科学基金重点项目"大气细颗粒和超细颗粒的环境行为。界面过程和健康效应"，国家"十一五"科技支撑计划项目"建筑室内生物污染控制与改善关键技术研究"和"环境污染的健康风险评估与管理技术研究"，欧盟课题"健康与环境网络建设"、韩国环科院合作项目《亚洲沙尘污染对儿童健康影响的比较风险研究》等

Diven by the driving shaft,the barrel with the ematerials loaded performs cycling compound movements of translation,rotation and tumbling,which make the materials move annularly,radially and axially along the barrel boby ,thus achieving mutual flow,spread,accumulation and mixing of material for the purpose of fully mixing.

装料的筒体在主动轴的带动下，作周而复始的平移、转动和翻滚等复合运动，促使物料沿着筒体作环向、径向和轴向的三向复合运动，从而实现多种物料的相互流动、扩散、积聚、掺杂，达到均匀混合的目的。

The structural characteristics, such as short bridges, more rigid ligand, larger dihedral angle and different bridging groups, had significant effects on the stability, catalytic activity and polymerization behavior.The polymerizations of cycloolefin were carried out by catalystsβ-diketonate titanium, respectively.

催化剂桥基长度的缩短、两茂环之间的二面角及立体刚性的增大、两桥联基团的结构差异等因素对催化剂的热稳性、聚合活性及共聚情况都有一定的影响。

The affections on the yield of DLLA caused by catalyst, temperature and time etc. were studied. By using ethylene glycol as diluent, the distillate temperature of DLLA was lowed and the carbonization phenomenon could be avoided, which caused the yield of DLLA increasing from 36.8% to 51.3%. The molecular weight of PDLLA prepared by this method could reach 184,000. DLLA and PDLLA was characterized and analyzed by DSC, XRD and IR.The key of direct method to synthesize PDLLA is the exclusion of H2O from reaction system.

丙交酯开环聚合制备PDLLA的关键在于中间体D，L-丙交酯的制备，研究了催化剂、反应温度、反应时间等因素对DLLA产率的影响，通过在反应体系中加入稀释剂乙二醇，DLLA的馏出温度明显降低，避免了DLLA在蒸馏过程中产生碳化现象，并使DLLA的平均产率由36.8％提高至51.3％，制备的PDLLA分子量最大值达18.4万。

Including 15 varieties of quality products title of the autonomous region, 32 S Buyou product of the title of yarn, combed the first batch of products into the regional brand-name products, textile and successful trial production of 120 S combing the autonomous region to fill the high-count yarn of the Ring Blank, the colored cotton spinning Test series won the regional Science and Technology Commission, presented the new product certification, the air spinning "the Qiao" brand 16 S-32 S, and other leading products have been Germany Schlafhorst Belcoro brand authorization, 40 S, 50 S Spinning flow of the production, filling the air with spinning high domestic product gaps, air soft knitting yarn spinning and high-woven yarn with high-quality domestic and international advanced level.

其中有15个品种获自治区优质产品称号，32S纱获部优产品称号，精梳系列产品成为自治区首批名牌产品，成功试纺并批量生产的精梳120 S填补了自治区环锭高支纱的空白，试纺的彩棉系列产品荣获自治区科委颁发的新产品证书，气流纺"金巧"牌16 S—32 S等主导产品已获德国赐来福公司Belcoro品牌授权，40 S、50 S气流纺纱的生产，填补了国内高支气流纺纱产品的空白，气流纺柔软针织纱和高支机织纱具有国内外高品质先进水平。

After that, we introduced a new approach to synthesis of valiolamine, by a series of reaction to the carbon-carbon double bond from the substrate of valienamine, including epoxidation, hydrogenolysis and so on, and obtained the aim product finally.

在完成上述合成路线后，本文通过提出了一条全新的合成伏格列波糖重要中间体valiolamine的路线，即采用对底物valienamine中的碳-碳双键进行环氧化、氢解等一系列反应，成功地制备出所需的中间体，研究全新的合成伏格列波糖的路线，研究结果证实：该新路线已经被打通。

In this thesis, the design scheme of a DSP-controlled inverter applied in mobile generator is presented at the beginning and then the design method of control system is mainly discussed. Equivalent output impedance model of instantaneous voltage and current closed-loop controlled inverter is established on the foundation mentioned above. How the values of LC filter, parameters of PI regulator and feedback coefficient etc. affect the external characteristic of inverter is analyzed in detail. Non-linear factor of inverter are also discussed and corresponding solutions are put forward.

本文首先给出了移动发电机DSP控制逆变模块的设计方案，着重讨论了控制系统的设计方法，在此基础上建立了电压电流瞬时值双闭环控制的逆变模块等效输出阻抗模型，对滤波器LC值、PI调节器参数和反馈系数等各项因素对逆变模块输出外特性的影响进行了详细分析，并探讨了逆变模块中非线性因素对输出波形的影响，提出了相应的解决方案。

Nowadays teenagers dye hairs, make differentiate smoky make-ups, tattoos on their bodies, and make various hair styles, such as Beckham's "Mohican" style, or pierce serial even a line of ear holes with metal rings, slip wide and slender metal bracelets on wrists or different weird rings such as skulls or other shapes, and wear metal necklaces around their necks and wear black vests… These are parts of punk culture; some other people sew and hang accessories on their clothes, and process their dressings, which are influenced by the D.I.

现在一些时尚的年轻人染发、画着各式各样的烟熏妆，身上纹身，做着各种头型，比如贝克汉姆般的"莫希干"头，或穿几个甚至一排耳洞，穿上金属小环，手腕上套着粗粗细细的金属手镯、骷髅等各种怪模怪样的戒指，脖子上围着金属项圈，穿着黑色的背心……其实这些都是朋克文化的一部分；还有的自己在服装上缝坠一些饰物，对服装进行再加工，这也是受到朋克DIY主张的影响。

On the basis of laboratory and in situ tests,we analyse the depth and perviousness of vadose zone as well as aquifer and aquifuge and, furthermore,point out Penglaizhen formation with poor permeability can effectively prevent pollution of ground water from the leachate of refuse.

结合室内和野外现场试验，详细分析填埋场区的包气带、含水层、相对隔水层的厚度、透水性等水文地质条件，指出被透水性差的蓬莱镇组中段地层所围限的三面环山、中间沟谷的地质环境，能够有效地阻滞垃圾渗滤液对地下水的污染。

Studies in neuropsychopharmacology and molecular neurobiology indicate that neurotransmitters and its receptors play important roles in alcohol abuse and addiction, and post-receptor signal transduction pathways, including cyclic adenosine 3', 5'-monophosphate-protein kinase A, phosphoinositide, Ca(superscript 2+)-calmodulin, phospholipase D and tyrosine kinase Fyn signaling cascade.

神经精神药理学和神经分子生物学研究表明，酒精滥用和成瘾不仅与中枢神经系统的神经递质及其相关的受体有关，而且，受体后的信号转导通路参与了酒精依赖的形成过程。其中包括环磷酸腺苷-蛋白激酶A、磷脂酰肌醇、Ca(上标 2+)-钙调蛋白、磷脂酶D以及酪氨酸激酶Fyn等信号途径。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。