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From the species, genus to family levels, the area with high gymnosperm richness increases, and the center with high richness shifts southward. About 85% of all Chinese gymnosperm species are harbored in just 5% of Chinese land area.

占中国陆地面积5%的裸子植物最丰富区域内分布了85%的中国自然分布的裸子植物物种。

According to the experiment results of degradation in field, degradation mechanism of the biodegradable mulch film can include four stages: the first, the material surface appeared deficiency while the surface area and interstice increased of material in the action of natural environment and microorganism; the second, along with the surface area and interstice of material increased and the gap strengthened, the chemical chain of the high polymer's principal chain broke as a result of the hydrolysis or the enzymatic effect in the action of hydration, causing the molecular weight and mechanics function descended; the third, the molecular of high polymer split the low polymer after its physical mechanical function descended, the material decomposed the fragments, the mass defect intensified; the fourth, the low polymer of fragments form in the natural environment, the microorganism, the biological enzyme became the smaller fragments, thus absorbed by the phagocytes, or further turn into CO2 and H2O due to hydrolysis.

根据田间降解试验结果推测,生物全降解地膜的降解机理可能包括四个阶段:第一,在自然环境、微生物作用下,材料表面出现缺陷,同时表面积增大、空隙增多;第二,随着材料表面积的增大、空隙的增多,吸水性增强,在自水合作用下,高聚物主链由于水解或酶解而使化学链断裂,导致分子量和力学性能下降;第三,在其物理机械性能下降后,高聚物分子链断裂为低聚物分子,材料裂解为碎片状,质量损失加剧;第四,碎片状低聚物在自然环境、微生物、生物酶作用下进一步水解变成尺寸更小的碎片,从而被吞噬细胞吸收,或进一步水解,生成CO2和H2O。

In the first part, a novel paraboloidal lensed multimode fiber has been analyzed amply in the coupling between the high power single emitter broad area diode laser and multimode fiber, which has been verified in the experiment. In the second part, the coupling between the high power single emitter broad area diode laser and cylindrical lensed multimode fiber has been discussed detailedly.

主要通过计算机仿真抛物面型光纤微透镜和柱状楔形光纤微透镜与大功率宽发射域半导体激光器的多模光纤耦合效率,并在实验中进行验证,提出了提高大功率宽发射域半导体激光器与多模光纤耦合效率的新方法。

In rural area of Lujiang, the high-risk group of pesticide poisoning is young adults, the high-risk group of productive poisoning is male group, and that of non-productive poisoning is female group; the most dangerous season is the third quarter of the year, the most affected area is polder.

在庐江农村,加强农药中毒的防治工作重点应是40~50岁的人群,生产性中毒防治重点人群是男性,非生产性中毒人群是女性;重点季节放在第3季度,重点地区是圩区。

On the basis of realizing the innovation of enterprises' management mechanism, adjust and optimize the structure of the cocoon and silk industry's distribution pattern, lead the raw material production and the original processing industry's shifting to the central and western regions from the eastern area according to the plan step by step, realize the silkworm industry's transformation to advantage areas, from disperse to intensify and keep appropriate scale; The combination between the western and eastern areas must have complementary advantages each other, the process ability, fund, technology, market and management in the east, combine with the cheap labor force and ihe abundant resource in the west, will form the industry chain of the close connection, step on the route of division of tabor on the basis of specialization, area overall arrangement, laige-scale production, industrialization management, develop high-quality-cocoon,top-grade-silk, refinement silk fabric, manufacture our country's cocoon and silk industry's key competitiveness together, form the scientific and reasonable, high-efficient and continuate industrial development pattern.

在实现企业经营机制创新的基础上,调整和优化茧丝绸产业布局结构,有计划、有步骤地引导茧丝绸原料生产与原料初加工工业由东部地区向中西部地区转移,实现蚕业生产由一般区域向优势蚕区的转移,由零星分散向适度规模、集约化方向转变;东西部强强联合,优势互补,东部的资金、技术、市场、管理、产后加工能力,与西部丰富的资源和劳动力成本低廉的优势相结合,形成紧密联结的产业链,走专业化分工、区域化布局、规模化生产、产业化经营、发展优质茧、高档丝、精品绸的路子,共同打造我国茧丝绸产业的核心竞争力,逐步形成科学合理、高效、可持续发展的产业格局。

Planting density, yield components, agronomic traits, leaf area index and group leaf area duration were analyzed in the study, the results showed that Xundan 20 had long trimness in high density. The high value of leaf areas kept over 60 days, and the effective illumination hours(PAR_Avg≥300mmol/s/m2)were over 780 hours in the whole developing stage.

结果表明:浚单20在高密度条件下维持了较高的整齐度,叶面积高值持续期达60d以上,整个玉米生育期内PAR_Avg≥300mmol/s/m2的有效光照时数达780h以上。

The key area of Shandong new high-tech industrial zone is along the line ofJiaozhou-Jinan Railway, so this structure research fetching this key area accord with therequisition for development of new high-tech industry at present of our province.

目前国内关于高技术及高新技术产业的研究很多,但一般是对单个或局部的高新技术产业园区进行的相关理论及实践研究。

Dealcoholization temperature markedly influences the surface area and porosity of the resultant MAO-supports. When the support was pretreated at lower or higher temperature, the corresponding MAO-support shows very low surface area;2.XRD and IR analyses indicate that MAO has reacted with the residual ethanol in the supports, which is an important manner to get MAO fixed on the carrier. Morever, XPS analyse indicates that MAO can also be coordinated with MgCl_2, which is another way to get MAO fixed on the support;3.ICP and EDX analyses indicate that dealcoholization temperature not only determined the element content on the solid catalyst, but also influences the element distribution on the carrier;4.The activities of the supported phenoxy-imine catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature. The support (MSP-5) obtained by treating MgCl_2·2.56C_2H_5OH at 160℃for 4 h, then modified by MAO is very effective for immobilizing complex 3, the resultant solid catalyst (MSPC-5) shows very high activity in ethylene polymerization, and its kinetics of polymerization is stable during the reaction process. Finally, PEs with spherical morphology and high bulk density (over 0.35g/ml) were obtained, without reactor fouling;5.In this work, polymerization conditions such as alkylaluminums, Al/Zr ratio, temperature and H_2 had a pronounced effect on the activity of MSPC-5 and properties of PE;(3). New MgCl_2-Supported Single-Site Catalysts for Ethylene PolymerizationIn this work, a kind of new MgCl_2 support was obtained by anhydrous MgCl_2 co-milled with solid MAO, and it is a creative contribution. Then some single-site catalysts were supported on the new MgCl_2 support, and the resulted solid catalysts were tested in ethylene polymerization, the results indicated that:1.XRD and IR analyses indicate that MAO does be coordinated with MgCl_2, which is in good agreement with the results obtained by XPS;2.co-mlling time had no obvious effect on the texture of support after 12 hours;3.In this work, MgCl_2 was co-milled with solid MAO for different hours, and then complex 3 was supported on these co-milled supports. It was found that co-milling time markedly influences the activity of solid catalysts, but it had negligible effect on the kinetic profile and the properties of resultant PE.

XPS研究结果表明,MAO不仅仅只和乙醇作用,MAO还与MgCl_2本身有一定的作用,这是一个极为重要的发现;3、通过ICP和EDX表征,发现载体的脱醇温度直接影响着元素在固体催化剂中的含量及分布;4、脱醇温度极大地影响着负载苯氧基亚胺类催化剂的活性和聚合物的性能,特别是原始载体经160℃活化4小时制备得到的固体催化剂MSPC-5的活性明显高于其他脱醇温度条件下制得的固体催化,并且催化剂寿命长,表现出稳定的动力学行为,最终获得了高堆密度(大于0.35g/ml)的球形聚乙烯颗粒;5、本文选择MSPC-5为研究对象,考察了聚合反应参数对催化剂的活性及其聚合物的影响,研究发现:不同的烷基铝对催化剂具有非常重要的影响,特别足TIBA对MSPC-5的助催化活性最高,烷基铝的加入量有一个较佳值,聚合温度为80度时活性最高,H_2的加入使催化剂的活性明显降低且聚合物的分子量也减小;、新型氯化镁载体负载单活性中心催化剂催化乙烯聚合本文创造性采用固体MAO与无水氯化镁直接进行共研磨,制备出了一种的新型的氯化镁载体,并将该载体用于多种单活性中心催化剂的负载化研究,研究表明:1、通过BET、XRD的表征,再次证实了MAO与MgCl_2之间具有直接作用,与XPS的研究结果相一致;2、当研磨时间高于12小时时,延长研磨时间对载体的结构没有显著的影响;3、将配合物3负载于共研磨时间不同的一系列载体上,乙烯聚合结果表明,尽管共研磨时间对负载催化剂的活性具有明显的影响,但是它对聚合物的性能以及催化剂的影响不明显。

Dealcoholization temperature markedly influences the surface area and porosity of the resultant MAO-supports. When the support was pretreated at lower or higher temperature, the corresponding MAO-support shows very low surface area; 2.XRD and IR analyses indicate that MAO has reacted with the residual ethanol in the supports, which is an important manner to get MAO fixed on the carrier. Morever, XPS analyse indicates that MAO can also be coordinated with MgCl_2, which is another way to get MAO fixed on the support; 3.ICP and EDX analyses indicate that dealcoholization temperature not only determined the element content on the solid catalyst, but also influences the element distribution on the carrier; 4.The activities of the supported phenoxy-imine catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature. The support (MSP-5) obtained by treating MgCl_2·2.56C_2H_5OH at 160℃for 4 h, then modified by MAO is very effective for immobilizing complex 3, the resultant solid catalyst (MSPC-5) shows very high activity in ethylene polymerization, and its kinetics of polymerization is stable during the reaction process. Finally, PEs with spherical morphology and high bulk density (over 0.35g/ml) were obtained, without reactor fouling; 5.In this work, polymerization conditions such as alkylaluminums, Al/Zr ratio, temperature and H_2 had a pronounced effect on the activity of MSPC-5 and properties of PE;(3). New MgCl_2-Supported Single-Site Catalysts for Ethylene Polymerization In this work, a kind of new MgCl_2 support was obtained by anhydrous MgCl_2 co-milled with solid MAO, and it is a creative contribution. Then some single-site catalysts were supported on the new MgCl_2 support, and the resulted solid catalysts were tested in ethylene polymerization, the results indicated that: 1.XRD and IR analyses indicate that MAO does be coordinated with MgCl_2, which is in good agreement with the results obtained by XPS; 2.co-mlling time had no obvious effect on the texture of support after 12 hours; 3.In this work, MgCl_2 was co-milled with solid MAO for different hours, and then complex 3 was supported on these co-milled supports. It was found that co-milling time markedly influences the activity of solid catalysts, but it had negligible effect on the kinetic profile and the properties of resultant PE.

XPS研究结果表明,MAO不仅仅只和乙醇作用,MAO还与MgCl_2本身有一定的作用,这是一个极为重要的发现; 3、通过ICP和EDX表征,发现载体的脱醇温度直接影响着元素在固体催化剂中的含量及分布; 4、脱醇温度极大地影响着负载苯氧基亚胺类催化剂的活性和聚合物的性能,特别是原始载体经160℃活化4小时制备得到的固体催化剂MSPC-5的活性明显高于其他脱醇温度条件下制得的固体催化,并且催化剂寿命长,表现出稳定的动力学行为,最终获得了高堆密度(大于0.35g/ml)的球形聚乙烯颗粒; 5、本文选择MSPC-5为研究对象,考察了聚合反应参数对催化剂的活性及其聚合物的影响,研究发现:不同的烷基铝对催化剂具有非常重要的影响,特别足TIBA对MSPC-5的助催化活性最高,烷基铝的加入量有一个较佳值,聚合温度为80度时活性最高,H_2的加入使催化剂的活性明显降低且聚合物的分子量也减小;、新型氯化镁载体负载单活性中心催化剂催化乙烯聚合本文创造性采用固体MAO与无水氯化镁直接进行共研磨,制备出了一种的新型的氯化镁载体,并将该载体用于多种单活性中心催化剂的负载化研究,研究表明: 1、通过BET、XRD的表征,再次证实了MAO与MgCl_2之间具有直接作用,与XPS的研究结果相一致; 2、当研磨时间高于12小时时,延长研磨时间对载体的结构没有显著的影响; 3、将配合物3负载于共研磨时间不同的一系列载体上,乙烯聚合结果表明,尽管共研磨时间对负载催化剂的活性具有明显的影响,但是它对聚合物的性能以及催化剂的影响不明显。

Innovative Results】Based on study on colorectal cancer screening in Xiacheng district,the results have showed that①The CRC screening in urban area based on guideline established by our units had the same good results as in rural area.High risk factors questionnaire investigation had important role in CRC screening and it can make up the shortcomings of iFOBT and detect nonbleeding lesions,especially precancerous lesions such as adenomas and polyps;②Each high risk factor was sorted according to sensitivity and specificity for the first time among natural population in city.

通过对下城区大肠癌筛查的研究①首次证明来自于中小城市农村的大肠癌筛查方案对城市社区自然人群与中小城市农村的自然人群一样具有较好的检出效果,证明了问卷调查对大肠癌筛查的重要作用,能弥补iFOBT不足,发现其不能检出的包括不出血病变,尤其是腺瘤、息肉;②首次在城市社区自然人群中对各高危项目根据诊断的敏感度及特异度进行了排序。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力