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Some Thoughts on the Establishment of Forestry Science and Technology Evaluation System in china

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chinese Forestry Science and Technology 2009年第4期8卷 12-18页

作者： MEI Xiuying chinese academy of Forestry, beijing 100091, P. R. china

The establishment of china’s forestry science and technology evaluation system is an important guarantee measure to improve the level of forestry science and technology management and promote forestry science and technology advancement. Based on the analysis of the current condition of forestry science and technology evaluation in china, the paper presents the suggestions to establish and improve forestry science and technology system, including the change in evaluation subject, the standardization of evaluation approaches and the implementation of classified evaluation, to solve the problems existing in the current forestry science and technology evaluation like non-standardization of evaluation methods, incomplete evaluation system and unsound evaluation indicator system.

关键词： forestry science and technology evaluation system

植物基因组表达序列标签(EST)计划研究进展

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生物化学与生物物理进展 2001年第4期28卷 494-497页

作者：骆蒙贾继增中国农业科学院品种资源研究所农业部作物种质资源与生物技术重点实验室北京100081

植物表达序列标签 (EST)计划是随机挑选cDNA克隆 ,并对其 3′或 5′端进行大规模一次性测序 ,将得到的 15 0～ 5 0 0bp长度的DNA片段与数据库中的序列进行比较 ,获得对基因组结构、组织、表达等认识的基因组研究策略 .就近年来国际植物... 详细信息

植物表达序列标签 (EST)计划是随机挑选cDNA克隆 ,并对其 3′或 5′端进行大规模一次性测序 ,将得到的 15 0～ 5 0 0bp长度的DNA片段与数据库中的序列进行比较 ,获得对基因组结构、组织、表达等认识的基因组研究策略 .就近年来国际植物EST计划的实施情况、植物EST计划的研究范围、生物信息学在EST研究中的应用、EST数据库及查询。

关键词：植物基因组表达序列标签生物信息学

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一种丙烯酰胺凝胶的新型光聚合法

生物化学与生物物理进展 1998年第2期25卷 167-170页

作者：周军贤周筠梅中国科学院生物物理研究所生物大分子国家重点实验室

以亚甲基蓝为引发剂，甲苯亚磺酸钠为还原剂，二苯氯化碘为氧化剂的丙烯酰胺凝胶光聚合方法，具有试剂配制简单，适用范围广，方法稳定性和重现性好，且聚合速度快，操作易于控制等特点，是一种不同于最为广泛使用的过硫酸铵／四甲基乙... 详细信息

以亚甲基蓝为引发剂，甲苯亚磺酸钠为还原剂，二苯氯化碘为氧化剂的丙烯酰胺凝胶光聚合方法，具有试剂配制简单，适用范围广，方法稳定性和重现性好，且聚合速度快，操作易于控制等特点，是一种不同于最为广泛使用的过硫酸铵／四甲基乙二胺和核黄素／四甲基乙二胺法的新型光聚合法．用这一方法做了ＳＤＳ和在酸性缓冲体系中的尿素变性梯度胶电泳。

关键词：亚甲基蓝光聚合聚丙烯酰胺凝胶电泳

Geochemistry of late Mesozoic lamprophyre dykes from the Taihang Mountains,north china,and implications for the sub-continental lithospheric mantle

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Geochemistry of late Mesozoic lamprophyre dykes from the Tai...

中国科学院地质与地球物理研究所2002学术年会

作者： BIN CHEN~(a,b) &MINGGUO ZHAI~b a.Department of Geology,Peking university,beijing 100871,china b.Institute of Geology and Geophysics,chinese academy of sciences,beijing 100029,china

Many late Mesozoic lamprophyre dykes occur in the Taihang Mountains(north china).These lamprophyres are rich in large ion lithophile elements(***,Sr,Ba,and K.) and light REE,and have highly differentiated REE *** show large but regular variations in chemical and Nd-Sr isotopic *** these suggest that the lamprophyres were produced from differentiation of a parental magma,coupled with contamination by lower *** parental magma was derived from melting of a long-term enriched sub-continental lithospheric mantle source as is indicated by the highly enriched isotopic signatures of the *** enrichment in the area was probably produced by interaction of volatile-rich melts released from the asthenosphere with the above lithosphere in middle Proterozoic times.

关键词： geochemistry lamprophyres lithosphere Mesozoic northern china

The boundary layer characteristics in the heavy fog formation process over beijing and its adjacent areas

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Science china Earth sciences 2005年第Z2期48卷 88-101页

作者： ZHANG Guangzhi, BIAN Lingeng, WANG Jizhi, YANG Yuanqin, YAO Wenqing & XU Xiangde HWL of chinese academy of Meteorological sciences, beijing 10008, china National Meteorological Center, beijing 100081, china HWL of chinese academy of Meteorological sciences Beijing 10008 China National Meteorological Center Beijing 100081 China

By utilizing the Atmospheric Boundary Layer (ABL) observational data made available from the project "973" under the auspices of the Ministry of Science and Technology of the People's Republic of china - entitled the beijing City Air Pollution Observation Field Experiment (BECAPEX), including the measurements by a wind profiler, captive airships, tower-based boundary layer wind and temperature gradient observational instruments (ultrasonic anemometers and electronic thermometers), air composition samplers, conventional upper-air, surface and Automatic Weather Stations (AWS) observations, this paper herewith analyzes, in a comprehensive manner, the occurrence of a heavy fog event over beijing in February 2001, including its formation, development, persistence, dynamic and thermodynamic features as well as evolving stratification structures within the boundary layer at different stages. The results suggested: (i) as a typical case of urban heavy fog, before the fog onset over beijing, a temperature inversion existed in the lower atmosphere, the smokes and the pollutants like SO2 and NO2 had been accumulated at a lower level. Proceeding the fog event, with the increase of SO2 and NO2 concentrations, condensability increased sharply. On the contrary, during the fog process, with increasing condensability, SO2 and NO2 concentrations decreased. This indicated that, acting as condensation nucleus, these accumulated pollutants were playing a key role in catalyzing the fog condensation. (ii) By analyzing mean gradient-, pulsation- and turbulence-distribution patterns derived from the wind measurements taken by the aforementioned tower-based instruments, they all indicated that about 10 hours before the fog onset, a signal foretelling potential strong disturbances in the lower boundary layer was detected, and a significant rise of both mean and disturbance kinetic energies was observed, revealing that the low-level wind shear was strengthened before the fog onset, consequentl

关键词： beijing heavy fog, SO2 and NO2, catalyzing fog condensation, disturbance kinetic energy signal.

The electrical conductivity of H_2O at 0.21-4.18 GPa and 20 -350℃

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chinese Science Bulletin 1997年第12期42卷 969-976页

作者： ZHENG Haifei, XIE Hongsen, XU Yousheng, SONG Maoshuang, GUO Jie and ZHANG YuemingInstitute of Geochemistry, chinese academy of sciences, Guiyang 550002, china Department of Geology, Peking university, beijing 100871, china

The electrical conductivity of H2O in solid and liquid phases has been measured at 0.21-4.18 GPa and 20-350℃. The results indicate: ( i ) different phases of H2O in solid have different relations between electrical conductivity and temperature and pressure. The conductivity changes continuously with temperature, but discontinuously with the pressure between 2.11 and 2.58 GPa, which corresponds to the transforming pressure between ice (Ⅵ) and ice ( Ⅶ ) ; ( ii ) the con-ductivity of H2O in liquid all increases with temperature and pressure, but there are discontinuities at pressures between 0.57 and 0.9 GPa, and between 2.11 and 2.58 GPa, which are also consistent with the polymorph of ice (ice ( Ⅴ), ice (Ⅵ) and ice ( Ⅶ ) ) . This reflects that H2O in liquid at different pressures has quite different properties of electron chemistry. It is prob-ably the important reason that causes the layers with high electrical conductivity and low velocity in the earth’s crust and upper mantle.

关键词： high temperature and high pressure ice water electrical conductivity.

Plant hormone and the developmental control of organ size

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Plant hormone and the developmental control of organ size

2006年拟南芥研究学术研讨会

作者： Yuxin Hu Institute of Botany, chinese academy of sciences, beijing 100093

＜正＞Plant organs and their final sizes are very important traits for plant architecture and contribute greatly to plant biomass. The size of an organ in high plant is determined by the co-ordination of cell proliferation, expansion and differentiation, the developmental processes that are regulated by plant internal and environmental signals, especially plant hormones. Most of Arabidopsis mutants related plant hormones, such as auxin, cytokinin and brassinosteroid, develop the altered size of organs, indicating that plant

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Synthesis of ZnS from organic sulfur in petroleum coke and its photocatalysis properties

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Petroleum Science 2010年第2期7卷 268-272页

作者： Zheng Yanjun Wang Xudong Cui Lishan State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China Department of Materials Science and Engineering China University of Petroleum Beijing 102249 China Technical Department Construction Division Offshore Oil Engineering Co. Ltd Mailbox 595 Tianjin 300452 China

Organic sulfur in high sulfur petroleum coke was treated as the S source for synthesis of ZnS photocatalyst. Experimental results showed that with ball milling and subsequent heating treatment, ZnS compound could be successfully synthesized and showed considerable photocatalysis activity for decomposing industrial pollutants. The concentration of methyl orange or ethylene blue may be lowered to less than 5% after being decomposed by the synthesized-ZnS photocatalysis. Results of this study suggested a potential technique of turning high sulfur petroleum cokes from industrial wastes into useful products for environment improvement.

关键词： Petroleum coke photocatalysis ZnS ball milling high-sulfur

Global Smooth Solutions for the Quasilinear Wave Equation with Boundary Dissipation

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Global Smooth Solutions for the Quasilinear Wave Equation wi...

第25届中国控制会议

作者： Yao Pengfei academy of Mathematics and Systems Science, chinese academy of sciences, beijing 100080

＜正＞We consider the existence of global solutions of the quasilinear wave equation with a boundary dissipation structure of an input-output in the higher-dimensional case when initial data and boundary inputs are near a given equilibrium of the system. Our main tool is the geometrical analysis. The main interest is to study the effect of the boundary dissipation structure on solutions of the quasilinear system. We show that the existence of global solutions depends not only on this dissipation structure but also on a Riemannian metric, given by the coefficients and the equilibrium of the system. Some geometrical conditions on this Riemannian metric are presented to guarantee the existence of global solutions. In particular, we prove that the norm of the state of the system decays exponentially if the input stops after a finite time, which implies the exponential stabilization of the system by boundary feedback.

关键词： Quasilinear wave equation Riemannian metric Dissipative boundary structure