mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
遗传性代谢病诊治的过去和未来

遗传性代谢病或称先天性代谢缺陷（Inborn Error Metabolism,IEM），是参与体内代谢的某种酶、运载蛋白、膜或受体等的编码基因发生突变，使其编码的产物功能不良而引发代谢失常的一类疾病。这类疾病大多数在新生儿、婴幼儿或儿童时期发病，有些酸在成年期发病，但在儿童时期已有潜在病变。故遗传性代谢病的诊断、防治属儿科范畴。遗传代谢病的种类很多，目前已报道的达500余种，是人类疾病中病种最多的一类疾病。且随着检测诊断技术不断进步，还会发现更多的病种。由于每种病的发生率很低，又是临床工作者多感生疏的病，故诊断较困难。这类疾病发病后常呈进行性加重，如未能早期识别诊断，干预、治疗，常致早期夭折或终身残疾，且以神经、智力残疾为最多，会严重影响人口素质，造成家庭和社会的沉重负担。遗传系代谢病大多为单基因遗传，少数为线粒体遗传，再现率高。遗传代谢病随起自一种基因的突变，但由于该基因编码或酶等功能蛋白分布于全身多种器官，病变常累及多个系统，儿科各专业均会遇到遗传性代谢病。如何提高其诊断和防治水平是全体儿科工作者都要面对和迫切需要解决的问题。
环孢素A宜减不宜废

有关肾移植术后环孢素A（CsA）减撤问题的争论起源于近年人们对移植物长期存活问题的分析和思考。因为虽然CsA大大提高了移植物的短期存活率，而长期存活却未显著改善；与此同时和钙调素抑制剂（CNI，包括CsA与FK506）长期应用关的一些毒副作用与并发症，如高血压、高血指、糖尿病、高尿酸血症以及肾功能减退等，来重影响着移植患者和移植物的长期存活。因此，近年有许多文章提出针对CNI的低毒性免疫抑制药物治疗方案，包括CNI减量节省使用及至最后撤除停用的所谓Spar-ing方案，和压根就避免采用CNI作为术后免疫抑制药治疗的所谓Avoiding方案。
RESEARCH ANNOUNCEMENTS--An Asymptotic Order of Fourier Transform on SL(2,R)

Let Sl(2,R)be the group of all real matrics of order 2with determinant1. In this paper, we use G to denote both SL(2,R)and the lie group SU(1,1)={(α/ββ/α):|α|~2-|β|~2=1,α,β∈C} because they are isomorphic to each other~[1].
极区夏季中层顶大气波的共振非线性相互作用

采用德国SOUSY VHF雷达数据研究极区夏季中层顶区域行星波—潮汐—重力波之间的非线性相互作用以及中层顶以上高度背景大气的不稳定性．纬向风场的Lomb—Scargle功率谱显示35h行星波、周日潮、半日潮和1／8ch^-1潮汐是中层顶区域占优势地位的大气扰动．对频率组合的检验发现多组满足频率共振条件的三波组．双谱分析表明大多数双谱峰代表潮汐谐波之间或潮汐与行星波或重力波之间的相互耦合，而双谱峰的高度变化反映了波—波相互作用的变化．在中层顶以上，主要波分量对应的最强谱峰所在的各高度倾向于随频率增高而依次增加．这可能是由两个低频波发生共振相互作用生成一个高频波的缘故．行星波和潮汐的强度随高度近似地依次序逐渐增长，达到最大，然后再快速衰减．这种图像与一个随高度增加从低频段向高频段移动的波—波共振相互作用“链”相关．不稳定性分析表明，在中层顶以上高度，Richardson数越来越小，说明湍流运动逐渐加强，背景大气越来越不稳定．最后建议，波—波和频共振相互作用与因不稳定导致的波耗散是中层顶区域两种占支配地位的动力学过程．前者引起能量逐渐从低频波动向高频波动传输．后者导致对背景大气的加热和对平均流的加速。
遥感和地理信息系统新技术正在成为勘探与生产的标准工具

在地震采集前，若能合理地使用遥感信息，即使是相对较昂贵的超光谱数据，也能节省大量时间和金钱。遥感技术应用范围的扩大主要是由于提高了对遥感数据的熟悉程度和数据更容易获得。目前两类令人关注的应用是：裂缝作图和分析，探测地表渗漏的油气。
不分明拓扑中的Stone表示定理

对一类完全分配格给出了Stone表示定理的格值形式．准确地说，证明了若L是一frame且0∈L是素元或1∈L是余素元，则分配格范畴对偶同构于凝聚L-locale范畴；若L还是完全分配的，则分配格范畴对偶同构于凝聚满层L—拓扑空间范畴．
影响长江地区夏季洪涝的大气环流因子研究

提出用条件相关矩信噪比，研究大气环流对长江地区夏季洪涝的影响，以及研究在不同时间尺度上它们之间的非线性关系，并建立相应概念物理统计模型。发现在上年大气环流指数值偏高时，对长江地区夏季洪涝影响最强烈的大气环流因子是：下半年南海副高面积和南海副高强度，第4季度西太平洋副高面积和南海副高面积，以及7月份亚洲区极涡强度和8月份北美太平洋副高面积。大气环流指数值偏低时，其影响因子是：5月份和上年度西太平洋副高西伸脊点累积值，以及下半年北半球副高北界对该地区洪涝有显著影响。还发现，对长江地区夏季洪涝影响的大气环流因子中，指数值偏低时的影响不如偏高时强烈。
陆生植物对全球变化的适应性研究进展

全球变化的过程正在加剧，影响植物的生态因子也将发生不同程度的变化。大气C02浓度升高、温度升高、降水格局的变化及由于臭氧层变薄而引起的紫外线B辐射增强等已经严重地影响了植物的生理生态过程。从不同方面，特别是从植物对关键生态因子变化的生理生态适应机制和它们间的交互作用等方面，评述了国内外近年来的研究进展，提出了未来全球变化背景下植物对全球变化的适应性研究需重视的方面。
硫代异鼠李糖甘油二酯(SQDG)的生物合成与功能

硫代异鼠李糖甘油二酯(SQDG)是一种含硫的糖脂，分布于高等植物，藓类植物，蕨类植物，藻类植物以及大多数光合细菌的光合膜中。SQDG的含量与生物种类有关。在高等植物中含量一般为总脂的4％，而在藻类中其含量变化较大，一般为总脂含量的10％—70％。SQDG的合成是在叶绿体内被膜上完成的，催化SQDG合成的酶是UDP—SQ：DAG硫代异鼠李糖基转移酶。SQDG存在于纯化的叶绿体CF0-CF1ATPase、LHCⅡ辅基蛋白以及D1／D2异二聚体蛋白中，说明SQDG可能与膜蛋白复合物的结构和功能有关。SQDG还与植物的抗逆性有关。在磷缺乏时，SQDG能弥补PG含量的下降，使体内阴离子脂的含量维持在一个稳定的水平。近年来还发现SQDG能有效抑制真核生物DNA聚合酶和HIV反转录酶的活性。
大型高速岩质滑坡流体化理论研究

通过风洞模型实验，研究了大型高速滑坡凌空飞行阶段的空气动力学效应，研究了飞行中滑坡岩体在与途中不动山体发生碰撞时的解体破碎效应，通过滑坡岩体高速碰撞模型实验研究了滑坡岩体解体破碎后部分岩体的加速运动效应，并应用离散单元法再现了云南头寨沟大型滑坡启动高速、近程碰撞、远程碎屑流运动的全过程，研究了岩体解体破碎后形成不同类型碎屑流的运动规律及运动方程，并对头寨沟滑坡流体化运动机理进行了实例分析，取得了以下主要结论和成果。
国内岩土边坡稳定分析软件面临的问题及几点思考

“岩土工程学是土木工程的生要分支，是一门涵盖工程地质学、土力学、岩石力学、基础工程和地下工程的综合性学科”；然而，就在岩土工程理论与实践不断地取得新进展、新成果的同时，越来越多的同行发现，要想高效准确地工作，是离不开计算机的。如果说地质学、土力学等诸多理论是解决岩土工程问题的有力工具，那么计算机数值模拟技术更是当今发展岩土工程理论、解决工程实际问题不可或缺的基本手段和工具。早在1991年，美国的“国家关键技术委员会”就在一份报告中明确提出：计算机仿真与建模是美国新时期应优先发展的关键技术之一。从20世纪80年代初至今，近20a的实践也充分展现了数值模拟技术在各行各业高速发展中所起到的巨大推动作用。因此，当代岩土工程学必须包括相关计算机仿真与建模技术。
ANTITUMOR IMMUNITY AND VACCINE EFFECT INDUCED BY IL-12 SYNERGIZES B7-1 GENE TRANSFECTED CELLS

Objective: To study the synergic effects of IL-12 and B7-1 transfectant on antitumor immunity in vivo. Methods: The retrovirus vector encoding mIL-12 and mB7-l gene was tranfected into EL-4 thymic Iymphoma cells respectively. The cells were used as tumor vaccine and the therapeutic effect was observed. Results: In contrast to the mice immunized with EL-4/Wt or EL-4/Neo groups, the tumorigenicity of EL-4/IL-12 transfectant was decreased (P < 0.001). The EL-4/TL-12 and EL-4/B7-1 cells irradiated with 60Co showed significant systematic protective effects against the rechallenge of EL-4/Wt. ~(60)Co irradiated EL-4/IL-12 cells delayed the occurrence of tumor and prolonged the survival period of tumor bearing mice. Combination of the vaccines of EL-4/IL-12 and EL-4/B7-1 resulted in the enhanced therapeutic effect compared with each single transfectant group (P < 0.001). Conclusion: The results showed that IL-12 transduced cells could enhance the antitumor immunity of host as cancer vaccine. Combination of the EL-4/IL-12 and EL-4/B7-1 transfectant could improve immunity of host and is a prospect cancer vaccine.
光诱导对发芽大豆中半乳糖酸内酯脱氢酶活性和维生素C合成的影响

维生素C（VC）在体内具有多种生物活性，是人体必需的营养素之一。植物性食物是人体所需VC的主要来源。大豆种子中VC含量很低，但在发芽过程中VC出现明显增加。说明大豆的发芽过程中启动了VC的生物合成途径。但目前对大豆发芽过程中VC的合成积累机制尚不清楚。最近Wheeler等提出植物体内由D-葡萄糖合成VC（抗环血酸）的代谢途径，这一合成途径已经在马铃薯、向日葵等植物中得到证实。研究表明，半乳糖酸内酯脱氢酶（GLDH，EC1.3.2.3）是这一合成途径的关键酶。大豆发芽制品是我国的一种传统食品，本研究观察了蓝光、白光、红光及紫外光等不同光质、光强、光期处理对发芽大豆中GLDH活性和VC合成的影响，旨在为提高发芽大豆的VC含量提供科学依据。
Fluorescence Quenching of Anthracene by N,N-Diethylaniline and Phenothiazine in Triton X-100/n-C_(10)H_(21)OH/H_2O Microemulsion

The photo-induced electron transfer reactions of anthracene with N,N-diethylaniline(DEA) and phenothiazine(PTZ) occur in the membrane phase of a Triton X-100/n-C_(10)H_(21)OH(1-decanol)/H2O microemulsion. DEA and PTZ exist in the membrane phase of the microemulsion. Anthracene exists in the oil continuous phase of the W/O microemulsion and in the oil core and membrane phase of the O/W microemulsion.
Effect of Some Metal Ion Dopants on Electrochemical Properties of Ni(OH)2 Film Electrode

The Ni(OH)_2 film electrodes doped respectively with alkali-earth metal aluminum, lead, partial transition metal and some rare-earth metal(altogether 17 kinds of metals) ions were prepared by cathode electrodeposition. The electrode reaction reversibility, the difficult extent of oxygen evolution, the proton diffusion coefficient, the discharge potential of middle value and the active material utilization of the Ni(OH)_2 film electrode were compared with those of the ones doped with the metal ions by means of cyclic voltammetry, potential step and constant current charge-discharge experiments. It was found that Ca~(2+), Co~(2+), Cd~(2+), Al~(3+) etc. have obviously positive effect.
聚凝胺法快速检出IgG不规划抗体所致配血不合2例

患者1，男性，80岁，O型，曾输血1000ml(4人份），均无国务不良反应。因劳力性稳定型心绞痛而入院。实验室检查：WBC4.2×10~(12)/L,RBC3.45×10~(12)/L，Hb 72g/L, Hct30.1%，plt72×10~9/L，临床早请输“O”型全血400ml，其2人份在聚凝胺法配血时主侧呈3＋～4＋凝集，凝有ABO以外血型抗体。经详细胸血型血型血清学检查，发现患者血清中含有抗－C，-e。输注Rh系统相合的血液后未引起输血反应。
Facile and Efficient Syntheses of (±)-2,6-Dimethyl-6-hydroxy-2,7-octadienoic Acid and Its Methyl Ester

The facile and efficient total syntheses of monoterpenoid acid 7a and its ester 7b, isolated from Artemisia siebert and Piper aduncum respectively, can be completed in four steps with an overall yield 41%.
体外循环对心脏瓣膜置换患者机体免疫功能的影响

目的：探讨体外循环（CPB）心内直视手术对心脏瓣膜置换患者机体免疫功能影响。方法：动态监测心脏瓣膜置换者术前和术后1d,3d,7d,14d机体免疫功能（免疫球蛋白、补体等）的指标。结果：CPB术后1d,3d免疫球蛋白（IgG、IgA、IgM）和补体（C3、C4）测定值明显低于术前值（P＜0.05)。其中以IgG、C3降低显著（P＜0.01）。C4含量于术后3d恢复到术前水平。C反应蛋白术后1－3d测定值显著增高，与术前比较差异有显著性（P＜0.01），术后7d恢复术前水平。结论：CPB术后可使瓣膜置换者免疫功能受到明显抑制，是术后感染重要原因；故术前、术后采取综合性预防措施十分重要。
Effects of Dietary Intervention on Hyperlipidemia in Eight Communities of Beijing, China

Objective To examine the effect of community-based dietary intervention on hyperlipidemia. Methods A total of 180 hyperlipidemia individuals with TG > 2.26 mmol·L~(-1) (200 mg·dL) and/or TC > 5.72 mmol·L~(-1) (220 mg·dL~(-1)) were selected from 428 eligible subjects in eight communities of Beijing. They were randomly divided into intervention group (n = 108) and control group (n = 72). Dietary intervention was provided for the intervention group for 6 months. Information on dietary intakes, physical examinations and blood samples was collected. Serum lipids were assayed at baseline and endpoint of the study period. Results Respective decrease in dietary intake of total calorics, fat, cholesterol and cooking oil by 13.62%, 24.75%, 24.40%, and 22.43%., in the intervention group was observed. The percentages of total calories from fat, carbohydrate and protein appeared to be desirable after study. Reduced body weight and BMI were also observed. There was a respective 5.61% and 7.06 % decrease in total serum cholesterol and low-density lipoprotein cholesterol in the intervention group, while no significant changes were found in the control group. Conclusions Community-based dietary intervention can effectively improve dietary patterns, control body weight, and decrease the levels of total serum cholesterol and low-density lipoprotein cholesterol.
Hydrological setting of infertile species-rich wetland-a case study in the warm temperate Japan

The detailed groundwater flow and water chemistry to illustrate landscape structure of the infertile peatless mire by using piezometers and groundwater wells were measured. The instruments were installed in lines through a small spring-fed wetland underlying little peat from the hillslope to the valley bottom in southwestern Japan. Flow net and EC data clearly indicated that the wetland was situated in a high-EC groundwater upspring area. The low-productivity graminous vegetation was related with four hydrological factors such as: (1) high water level; (2) low-EC (< 25 micro S/cm) groundwater; (3) weakly upward hydraulic gradient; and (4) overflowing of negatively pressured groundwater. In other words, the "old or deep groundwater" constructed the foundation of slope-wetland, and maintained the high groundwater level. In contrast, overflowing "youthful groundwater" is supplied from head of slope-wetland preferentially through the shallow substratum. The plant communities of the peatless mire in southwestern Japan are similar to those of raised hog in northern cool temperate Japan. There have been some reports verifying that the underlying mineral substrata of such wetlands were quartzile rocks such us granite, rhyolite, chart and well-leached sand. Results showed (1) low cation availability affects the water acidity; (2) upward seepage of high-EC groundwater composed the foundation of the investigated peatless mire; and (3) the poor mineral condition seems to play a similar role to northern ombrotrophic(rain-fed) condition.
应用关联分析法综合估糯玉米新品种

对玉米新品种的评估，一般都是针对其产量、生育期、株型、果穗性状和抗性等单项指标进行分析和比较，而缺乏对多项性状的综合评价和定量统计分析。20世纪80年代以来，灰色关联度分析法应用于花生、大豆、油葵、甘薯等作物品种综合评估，取得了良好的效果。本文参照刘录祥等的研究方法，对糯玉米品比验的10个参试品种进行综合评估。
Exchange Reaction Between Selenite and Hydroxyl Ion of Variable Charge Soil Surfaces: I. Electrolyte Species and pH Effects

Hydroxyl release of red soil and latosol surfaces was quantitatively measured using a sell-made constant pit automated titration instrument, to study the changes of hydroxyl release with different added selenite amounts and pM levels, and to study the effects of electrolytes on hydroxyl release. Hydroxyl release increased with the selenite concentration, with a rapid increase at a low selenite concentration while slowing down at a high concentration. The pH where maximum of hydroxyl release appeared was not constant, shifting to a lower valus with increasing selenite concentration, Hydroxyl release decreased with increasing electrolyte concentration, and the decrease was very rapid at a low electrolyte concentration but slow at a high electrolyte concentration. For NaClCO_4, NaCl and Na_2SO_4, hydroxyl release was in the order of NaClO_4 > NaCl >> Na_2SO_4, and the difference was very significant. But for NaCl, KCl and CaCl_2, the order of hydroxyl release was NaCl > KCL > CaCl_2, and the difference was smaller. The amount of hydroxyl release from Xuwen latosol was greater than that from Jinxian red soil. Hydroxyl release existed in a wider range of pli with Xuwen latosol than with Jinxian red soil, due to their difference in soil properties. However, both soils had similar curves of hydroxyl release, indicating the common characteristics of variable charge soils.
HAZARD FUNCTION AND CHARACTERIZATIONS ON DISTRIBUTION TAILS OF NONNEGATIVE RANDOM VARIABLES

Some equivalent conditions on the classes of lighted-tailed and heavily heavy-tailed and lightly heavy-tailed d. f. s are introduced. The limit behavior of x~aF-bar (x) and e~(λx)F-bar (x) are discussed. Some properties of the subclass DK~c and subclas DK_1 are obtained.
超声对视网膜脱离的诊断价值

视网膜脱离是导致视力下降及失明的原因之一,我院自1998年开始至今采用高频探头超声检查出43例视网膜脱离病人,其中完全脱离35例,部分脱离8例。1 资料与方法  43例患者中44只眼视网膜脱离，男26例27只，女17例17只。年龄6~78岁，20岁以下4例，21~50岁13例，50岁以上26例。使用ASU-3000型彩色多普勒超声诊断仪，探头频率7.5 MHz。患者平卧位，轻闭双眼，进行横向、纵向、斜向多方位检查，同时可根据检查需要嘱其眼球转动方向。2 结果  43例患者中，36只眼视网膜完全性脱离，8只眼视网膜部分脱离。病因为白内障玻璃体混浊伴网脱20例；其中2例为6岁和7岁先天性白内障伴部分视网膜脱离，7例由外伤引起，爆炸伤、打击伤、刺伤等所致，4例由高度近视伴玻璃体混浊及玻璃体后脱离所致，1例8岁由葡萄膜炎所致，其他原因11例。
B超对胆囊炎病变程度的分级及临床意义

胆囊炎的不同病变程度在B超声像图上有不同的表现。术前根据B超声像图特点，可将胆囊炎的病变程度进行分级，这对胆囊切除手术方式的选择和手术难易程度的预测具有重要的指导意义。1 资料和方法  本组患者216例，其中男97例,女119例，年龄25~76岁。所有病例术前B超检查均诊断为胆囊炎，部分合并胆囊结石。使用TOSHIBA SSA-340A型超声诊断仪，探头频率3.75 MHz，空腹检查胆囊。根据胆囊及其周围的B超声像图改变，综合评价，进行分级。2 结果  观察本组216例胆囊炎、胆囊结石B超声像图，作者根据其七个方面的改变：①胆囊大小的改变；②囊壁厚度的改变；③囊内透声情况；④胆囊边界层次是否清晰；⑤肝外胆管是否受炎症累及；⑥深呼吸时胆囊的活动度（间接判断胆囊与周围组织是否有粘连，大于4 cm表明无粘连，小于4 cm表明有不同程度的粘连）；⑦胆囊周围有无网膜包裹。将胆囊炎的病变程度分为Ⅰ~Ⅳ级(表1,图1~4)。216例的手术前B超诊断及分级与手术后病理对照详情见表2。
TELOMERASE ACTIVITY OF FIBROBRONCHOSCOPIC BRUSHING CELLS IN NON-SMALL CELL LUNG CANCER

Objective: To evaluate the clinical significance of telomerase activity particularly in terms of prognostic impact in non-small cell lung cancer (NSCLC). Methods: The exfoliated cells from fibrobroncfaoscopic brushing were studied using polymerase chain reaction based on a telomerase repeat amplification protocal assay. Samples were taken from 60 NSCLC and 20 pulmonary infection cases. Results: Telomerase activity was detected in 53 of 60(88.3%) NSCLC specimens from the lesion side and in 5 of 25(20.0%) from the contralateral side but only in 2 of 20 pulmonary infection samples (P < 0.05). The telomerase activity levels in NSCLC (medium 0.109) were significantly higher than those in pulmonary infection (medium 0.018, U = 4.95, P < 0.05). The telomerase activity levels in tumor staged IIIb-IV (medium 0.173) were higher than those in staged I-IIIa (medium 0.132, U = 1.899, P < 0.05). Conclusion: Telomerase activity is one of the most important marker in patients with NSCLC. Telomerase activity increases with the a'dvance of tumor stage and can be used as a prognostic indicator of advanced NSCLC.
Analytic Solutions of Klein-gordon Equation and Generalized Schrodinger Equation

Analytics solutions of Klein-gordon equation u_(tt) - (u_(xx) + u_(yy) + α~2u + g (uu~*)u = 0 and generalized Schrodinger equation iu_t + u_(tt)-u_(yy) + g(uu~*)u = 0 are given when g(z) = Aln~2z + Blnz + C.
心肌病的磁共振成像（译文）

MRI能够清楚显示心肌病特征性的形态变化，可补充超声心动图的不足，为一种有效的检查方法。MRI电影尚可准确地对心功能进行无创性评价。近年用于缺血性心脏病的MR心肌灌注及延迟增强扫描，对心肌病的诊断也有重要作用。心肌灌注扫描可以发现心肌缺血，延迟增强提示心肌纤维化等，对分析肥厚型、扩张型等心肌病的预后将发挥重要作用。本文对心肌病（肥厚型、扩张型、限制型和致心律不齐性右室心肌病）的MRI诊断加以评价。
Implementing Semantic Deduction of Propositional Knowledge in an Extension Multi-layer Perceptor

The paper presents an extension multi-layer perceptron model that is capable of representing and reasoning propositional knowledge base. An extended version of propositional calculus is developed, and its some properties is discussed. Formulas of the extended calculus can be expressed in the extension multi-layer perceptron. Naturally, semantic deduction of propositional knowledge base can be implement by the extension multi-layer perceptron, and by learning, an unknown formula set can be found.
Is r_a ≤ δ for graphs which have diameter two?

A subset of S of the vertex set of a graph G is called acyclic if the subgraph it induces in G contains uo cycles. S is called an acyclic dominating set of C if it is both acyclic and dominating. The minimum cardinality of an acyclic dominating set, denoted by r_a(G), is called tup acyclic domination number of G. S. M. Hedetniemi et al. on 2000 introduced the concept of acyclic domination and posed the following open problem: Is r_a(G) ≤ δ(G) for any graph whose diameter is two? In this paper, we give a counterexample which disproves the problem.
超声诊断重复肾输尿管多发结石1例

患者男，36岁。既往有肾结石病史。近日腰部疼痛来诊。B超检查：左肾体积中度并增大，集合系统可见分离，宽约1.5cm。肾盂被分隔成上、下两部分。集合系统边缘散在强回声。大者约1.0cm，输尿管分为前、后两条。后方输尿管腔内示2个强回声，后伴声影。前方输尿管亦见一类似强回声，后伴声影（见图）。右肾大小正常，集合系统内见多发散在强回声，后伴声影。集合系统未见分离。经静脉肾盂造影诊断证实为左侧重复肾，双输尿管畸形伴多发结石（2条输尿管，3枚结石），双肾多发结石伴左肾轻度积水。
Introduction of Pinus radiata for afforestation: a review with reference to Aba, China

Pinus radiata D. Don, native to a Californian coastal environment, has been introduced to many parts of the world as an exotic species for afforestation. It is now a major plantation species in the Southern Hemisphere. In 1990, it was introduced to the heavily degraded, dry Min river valley area in Aba prefecture of Sichuan Province, P. R. China. Survival and growth of young trees planted at several sites appear to be reasonable. This review is to serve as an introduction to the large body of literature on P.radiata for forest scientists in China. It covers the following aspects: P. radiata in its native environment and in ex situ plantations, provenance and genetic variations, environmental limitations and climate niche, diseases and pests, lessons from unsuccessful introductions, and the use of P. radiata for ecological restoration. The early growth of P. radiata planted in the dry river valley area is briefly described. Potential problems associated with the introduction of P. radiata in Aba and future research needs are also identified.
Roles of urban vegetation on balance of carbon and oxygen in Guangzhou, China

The plant biomass and net primary production NPP) of urban vegetation in Guangzhou were estimated by dimension analysis, tree truck volume, and harvest methods us well as relationship between biomass and NPP and so on. The biomass and NPP were respectively 2875150) and 1058122 t/n. They were respectively 3924951 and 64948 t/a in the built-up area and 2482655t and 993147 t/a in the unbuilt-up area. It would make plant biomass, especially NPP decline obviously, if the unbuilt-up area were changed to the built-up area. The carbon content of plant was 1328649 for the total and 13.78 t/hm~2 for the mean, and amounts of carbon fixed and oxygen made by urban vegetation were respectively 4.80 t/(hm~2·a) and 12.79 t/( hm~2·a) for the mean and 462624 t/a and 1232430 t/a for the total, which were equal to 1.45 times and 1.04 limes of those by human breathing. However, they were only equal to 7.61% and 4.97% of amount of carbon released and oxygen consumption in urban Guangzhou. The biomass and NPP of urban vegetation in Guangzhou only corresponded to 7.8% and 47.3%) of those of southern subtropical evergreen broad-leaf forest in Dinghu Mountain. Therefore, the roles of Guangzhou urban vegetation in balance of carbon and oxygen would be increased greatly if it could be conserved and improved in some way.
A class of asynchronous parallel multisplitting relaxation methods for large sparse linear complementarity problems

Asynchronous parallel multisplitting relaxation methods for solving large sparse linear complementarity problems are presented, and their convergence is proved when the system matrices are H-matrices having positive diagonal elements. Moreover, block and multi-parameter variants of the new methods, together with their convergence properties, are investigated in detail. Numerical results show that these new methods can achieve high parallel efficiency for solving the large sparse linear complementarity problems on multiprocessor systems.
Dynamic change of arborous species diversity in natural secondary forests after selective cutting on the north slope of Changbai Mountain, Northeast China

The community characteristics of natural secondary forests on the north slope of Changbai Mountain after selective cutting were investigated, and the dynamics of arborous species diversity during the restoration period of 28 years were studied. The results showed that the arborous species richness (S) had little change and kept the range of 18-22 all along, the Simpson index (D) of the secondary layer and regeneration layer and whole stand had similar trends of change, but that of the canopy layer descended slowly in initial 15 years and had little change later, and the change of diversity index was not obvious and the Shannon-Wiener index (H') fluctuated in a very small scopes (H' ± 10%).
Automorphisms of Association Schemes of Quadratic Forms over a Finite Field of Characteristic Two

Let X_n denote the set of quadratic forms in n variables over a finite field F_q of characteristic 2, and X_n the association scheme on X_n by defining the relations with respect to the type of quadratic forms. We prove that every automorphism of X_n is of the form X |→ P~tX~σP + Y for all X ∈X_n, where P ∈GL_n(F_q), σ is an automorphism of F_q, and Y ∈X_n.
Dynamics of profiles and storage of carbon dioxide in broad-leaved/Korean forest in Changbai Mountain

CO_2 concentrations at different heights in a broadleaved/Korean forest (with a mean height of 26 m) were measured with infrared gas analyzer IRGA (model 2250D, LI-COR Inc. and LI-COR, 820) from Aug. to Oct. of 1999, Apr. to Jut. of 2000, and from Aug. 2002 to Sept. 2003. Based on the collected dada, the diurnal and seasonal dynamics of profiles and storage of carbon dioxide in the forest were analyzed. The diurnal CO_2 profiles showed that the vertical distribution of CO2 concentration were different for daytime and nighttime, and the CO_2 concentration was highest close to forest floor, no matter at daytime and nighttime. The seasonal profiles of CO2 showed that stratification in the canopy was evident during growth season. CO2 con-centrations at different heights (60 m to 2.5 m) had a little change in March, with a difference of 10 (imol-mol'1, but had a sig-nificant change in July, with a difference of 60 μmol·mol~(-1). In July, there also existed a greater gradient of CO_2 concentrations at canopy (22, 26 and 32 m), with a difference of 8 μmol·mol~(-1). The calculated total storage (A Cl A t) of CO2 in the aircolumn with height of 40 m beneath eddy covariance instrument was negative, and made a little contribution to NEE.
ON A HYPER HILBERT TRANSFORM

The authors define the directional hyper Hilbert transform and give its mixed norm estimate. The similar conclusions for the directional fractional integral of one dimension are also obtained in this paper. As an application of the above results, the authors give the LP-boundedness for a class of the hyper singular integrals and the fractional integrals with variable kernel. Moreover, as another application of the above results, the authors prove the dimension free estimate for the hyper Riesz transform. This is an extension of the related result obtained by Stein.
声学造影及相关技术在肾肿瘤中的应用

自从1968年Gramiah第一次描述声学造影剂以来，人们一直致力于研究各种声学造影剂及造影方法，目前声学造影的应用领域已从心脏延伸到心外器官，在腹部脏器中的应用研究以肝肿瘤为主要研究对象。超声是诊断肾肿瘤的首选方法，以往肾肿瘤良恶性的鉴别主要靠灰阶回声强弱，缺乏特异性。研究表明声学造影可增强肿瘤及肿瘤内血管显像，提高肾肿瘤的检出率，评价肾肿瘤血供特点及血供丰富与否，有助于肾肿瘤的诊断与鉴别诊断。本文综述声学造影在肾肿瘤中的研究进展。
THE VALUE DISTRIBUTION OF RANDOM DIRICHLET SERIES ON THE RIGHT HALF PLANE (II)

Kahane has studied the value distribution of the Gauss-Taylor series ∞∑_(n=1)anXnZ~n, where {Xn} is a complex Gauss sequence and  ∞∑_(n=1)|an|~2 = ∞. In this paper, by trans-n=l forming the right half plane into the unit disc and setting up some important inequal-ities, the value distribution of the Dirichlet series ∞∑_(n=0)X_ne~(λnS) is studied where {Xn} is a sequence of some non-degenerate independent random variable satisfying conditions: EXn = ∞∑_(n=0) E|Xn|~2 = +∞;Vn∈N,Xn or ReXn or ImA'n of bounded density.  There n=0 exists a > 0 such that Vn : α~2 E|Xn|~2 ≤ E~2|Xn| < +∞ (the classic Gauss and Steinhaus random variables are special cases of such random variables).  The important results are obtained that every point on the line Res = 0 is a Picard point of the series without finite exceptional value a.s..