mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
The coupling characteristics and mechanism of farmland and rural housing land transition in China

Land use transition refers to the changes in land use morphology (both dominant morphology and recessive morphology) of a certain region over a certain period of time driven by socio-economic change and innovation, and it usually corresponds to the transition of socio-economic development phase. In China, farmland and rural housing land are the two major sources of land use transition. This paper analyzes the spatio-temporal coupling characteristics of farmland and rural housing land transition in China, using high-resolution Landsat TM (Thematic Mapper) data in 2000 and 2008, and the data from the Ministry of Land and Resources of China. The outcomes indicated that: (1) during 2000-2008, the cor-relation coefficient of farmland vs. rural housing land change is -0.921, and it shows that the change pattern of farmland and rural housing land is uncoordinated; (2) the result of Spear-man rank correlation analysis shows that rural housing land change has played a major role in the mutual transformation of farmland and rural housing land; and (3) it shows a high-degree spatial coupling between farmland and rural housing land change in southeast China during 2000-2008. In general, farmland and rural housing land transition in China is driven by socio-economic, bio-physical and managerial three-dimensional driving factors through the interactions among rural population, farmland and rural housing land. However, the spatio-temporal coupling phenomenon and mechanism of farmland and rural housing land transition in China are largely due to the "dual-track" structure of rural-urban develop-ment.
Altitude dependency of trends of daily climate extremes in southwestern China, 1961–2008

A total of 12 indices of temperature extremes and 11 indices of precipitation ex-tremes at 111 stations in southwestern China at altitudes of 285-4700 m were examined for the period 1961-2008. Significant correlations of temperature extremes and elevation in-cluded the trends of diurnal temperature range, frost days, ice days, cold night frequency and cold day frequency. Regional trends of growing season length, warm night frequency, coldest night and warmest night displayed a statistically significant positive correlation with altitude. These characteristics indicated the obvious warming with altitude. For precipitation extreme indices, only the trends of consecutive dry days, consecutive wet days, wet day precipitation and the number of heavy precipitation days had significant correlations with increasing alti-tude owing to the complex influence of atmospheric circulation. It also indicated the increased precipitation mainly at higher altitude areas, whereas the increase of extreme precipitation events mainly at lowers altitude. In addition, the clearly local influences are also crucial on climate extremes. The analysis revealed an enhanced sensitivity of climate extremes to ele-vation in southwestern China in the context of recent warming.
Spatiotemporal dynamics of electric power consumption in Chinese Mainland from 1995 to 2008 modeled using DMSP/OLS stable nighttime lights data

Electric power consumption (EPC) is one of the basic indices for evaluating electric power use. Obtaining timely and accurate data on the spatiotemporal dynamics of EPC is crucial for understanding and practical deployment of electric power resources. In this study, an EPC model was developed using stable nighttime lights time-series data from the Defense Meteorological Satellite Program Operational Linescan System (DMSP/OLS). The model was used to reconstruct the spatial patterns of EPC in Chinese Mainland at the county level from 1995 to 2008. In addition, the spatiotemporal dynamics of EPC were analyzed, and the fol-lowing conclusions were drawn. (1) The EPC model reliably represented the spatiotemporal dynamics of EPC in Chinese Mainland with approximately 70% accuracy. (2) The EPC in most regions of Chinese Mainland was at low to moderate levels, with marked temporal and spatial variations; of high-level EPC, 58.26% was concentrated in eastern China. Six urban agglomerations (Beijing-Tianjin-Tangshan region, Shanghai-Nanjing-Hangzhou region, Pearl River Delta, Shandong Peninsula, middle-south of Liaoning Province, and Sichuan Basin) accounted for 10.69% of the total area of Chinese Mainland but consumed 39.23% of the electricity. (3) The EPC of most regions in Chinese Mainland increased from 1995 to 2008, and 64% of the mainland area showed a significant increase in EPC. Moderate increases in EPC were found in 61.62% of eastern China and 80.65% of central China from 1995 to 2008, whereas 75.69% of western China showed no significant increase in EPC. Meanwhile, 77.27%, 89.35%, and 66.72% of the Shanghai-Nanjing-Hangzhou region, Pearl River Delta, and Shandong Peninsula, respectively, showed high-speed increases in EPC. Moderate increases in EPC occurred in 71.12% and 72.13% of the Beijing-Tianjin-Tangshan region and middle-south of Liaoning Province, respectively, while no significant increase occurred in 56.34% of the Sichuan Basin.
过氧化氢在骨科应用中的研究进展

过氧化氢水溶液又名双氧水,分子式H_2O_2,相对分子质量34.01,相对密度1.406 7(25℃),熔点-0.41℃,沸点150.2℃,是一弱酸性的无色透明略带苦味的液体,无毒,可溶于水、醇及醚。作为氧化消毒剂,体积分数为1%~3%的H_2O_2溶液在医学领域有着广泛的用途,在外科清创中具有杀菌、防腐、去臭、清洁创面的作用,因此深受外科医师的欢迎。本文就H_2O_2在骨科应用中的研究进展综述如下,进一步探讨及分析H_2O_2在骨科中的作用。
医务人员手机细菌污染调查与对策

随着通讯设施的发达,手机已成为重要而普及的通讯工具,医务人员由于环境及条件限制,接打手机时很不注意清洁操作,因此成为医院感染的原因之一,但对医务人员手机细菌污染调查研究甚少,笔者通过对医务人员手机细菌污染的监测,提出相应的预防措施。
2011年6月8日新疆托克逊M_S5.3地震震源机制解反演

2011年6月8日9时53分,新疆维吾尔自治区吐鲁番地区托克逊县发生MS5.3地震.据新疆自治区民政厅报告,截至6月9日7时,地震造成托克逊县1241人受灾,324户1335间房屋不同程度受损,其中50户168间农牧民住房成为危房、无法居住,274户1135间房屋墙体开裂,博斯坦乡中学24间教室房屋开裂,伊拉湖乡医院8间病房开裂,无人员伤亡报告.
A Mehrotra-Type Predictor-Corrector Algorithm for P_*(κ) Linear Complementarity Problems

Mehrotra-type predictor-corrector algorithm,as one of most efficient interior point methods,has become the backbones of most optimization packages.Salahi et al.proposed a cut strategy based algorithm for linear optimization that enjoyed polynomial complexity and maintained its efficiency in practice.We extend their algorithm to P_*(κ)linear complementarity problems.The way of choosing corrector direction for our algorithm is different from theirs. The new algorithm has been proved to have an ο((1+4κ)(17+19κ) √(1+2κn)~(3/2)log[(x~0)T_s0/ε] worst case iteration complexity bound.An numerical experiment verifies the feasibility of the new algorithm.
Two-pion interferometry for viscous hydrodynamic sources

The space-time evolution of the (1+1)-dimensional viscous hydrodynamics with an initial quarkgluon plasma (QGP) produced in ultrarelativistic heavy ion collisions is studied numerically. The particleemitting sources undergo a crossover transition from the QGP to hadronic gas. We take into account a usual shear viscosity for the strongly coupled QGP as well as the bulk viscosity which increases significantly in the crossover region. The two-pion Hanbury-Brown-Twiss (HBT) interferometry for the viscous hydrodynamic sources is performed. The HBT analyses indicate that the viscosity effect on the two-pion HBT results is small if only the shear viscosity is taken into consideration in the calculations. The bulk viscosity leads to a larger transverse freeze-out configuration of the pion-emitting sources, and thus increases the transverse HBT radii. The results of the longitudinal HBT radius for the source with Bjorken longitudinal scaling are consistent with the experimental data.
Frequency doubling of narrow-linewidth pulsed fiber laser

A pulsed master oscillator power amplifier system is constructed using a double-cladding polarized Ybdoped fiber and an all-fiber Q-switched narrow-linewidth pulsed laser used as seed laser.This system has a high repetition rate and provides a nanosecond pulsed laser with a narrow linewidth and linear polarization.Moreover,it generates amplified radiation with up to 14 W of average power,narrow linewidth(full-width at half-maximum is smaller than 0.12 nm),linear polarization at 1 080-nm wavelength,repetition rate of 51 kHz,and pulse duration of approximately 50 ns.Based on this pulsed amplified radiation,3.5 W of green laser,with an optical-to-optical efficiency of 27.3%,is obtained via single-pass frequency doubling using a noncritical phase matching KTP crystal.
Hepatitis C virus infection and health-related quality of life

Hepatitis C virus(HCV) hepatitis and other diseases related to HCV,such as cryoglobulinemia,lymphoma and renal failure,impair health-related quality of life(HRQoL).In addition,HCV per se might directly influence HRQoL via colonization of microglia in the brain or,indirectly,via the effect of systemic inflammatory cytokines which,in turn,can trigger brain interleukin production.The treatment of HCV-related disorders with interferon(IFN) has an effect on HRQoL.Initially,IFN causes a transient deterioration of HRQoL,due to the induction of depression and other side effects of treatment.Subsequently,the subjects who obtain a sustained virologic response experience an improvement in HRQoL.Only rarely does interferon treatment causes permanent detrimental effects on HRQoL,due to residual psychiatric or neurologic side effects.Liver transplantation is the only treatment for end-stage HCV-related liver disease.HRQoL generally improves massively a few months after transplantation,except in the case of serious complications of the transplant procedure.Furthermore,high levels of anxiety and neuroticism pre-transplant are associated with lower HRQoL one year after transplant.Additionally,six months after transplant,patients with HCV who experience virologic recurrence show significantly greater depression,anxiety,phobic anxiety,and paranoid ideation than anti-HCV-negative patients.In conclusion,optimal care for the overall well-being of patients with HCV infection requires adequate knowledge of their neurological and psychological status.
无创性空气动力学检查在嗓音医学中的研究进展

嗓音医学是一门研究发声的基本原理、探讨发声障碍的病因、发病机制、治疗及预防的科学。嗓音功能评价可以量化发声障碍的严重程度,指导选择合理的治疗方法及评估治疗的有效性。常用的嗓音评估方法包括:声带振动特征测试、嗓音质量的主客观评估、空气动力学评估等。空气动力学检查作为嗓音功能评估的重要组成部分，是通过测量喉作为能量转换器将声门下的空气动力能转换为声能的一系列相关指标，给喉功能做一个客观的评价。近年来，由于无创性空气动力学检查的简便性、结果的精确性，其临床应用价值日益显现。为此，特对近年来有关无创性空气动力学检查的检测指标、检查方法及临床应用等方面的进展进行综述。
New predistorter using triangular memory polynomial for power amplifier of OFDM-based wireless broadband communication system

A triangular memory polynomial(TMP) predistorter is presented in this paper to linearize a power amplifier’s nonlinear with memory effects.Compared with the traditional memory polynomial(MP) predistorter,the coefficients of TMP predistorter is reduced more than 75%,which can effectively decrease the implementation complexity.The coefficients of predistorter are directly extracted from an offline system identification process by an open-loop structure in our approach.Several signals with data rate 5 MHz,10 MHz,15 MHz and 20 MHz are used to verify the performance of the proposed predistorter.Experimental results show that the proposed TMP predistorter and the traditional MP predistorter almost have the same performance.
肺内结节间质病变

本组4例虽均表现为肺内弥漫性小结节阴影为主的肺间质病变，但影像学表现各有特点，这些特点为疾病诊断提供了帮助。密切结合临床仍为影像学作为诊断时必须考虑的问题：IPH临床表现为咳血，缺铁性贫血，贫血性心影增大；急性粟粒性肺结核临床表现为低热，PPD（+）；LCH临床表现为肝脾大，皮疹，骨质破坏，突眼，尿崩；过敏性肺炎常有临床接触史，如养鸽子，花粉接触等外源性因素。这些都是我们作影像学诊断的重要参考资料。熟悉各种肺间质病变的特点，掌握可靠的临床检验资料，一定可以提高诊断的准确率，但部分病例确诊须依靠病理检查。
维生素D骨骼外研究进展

维生素D(vitamin D)是大家熟知的脂溶性维生素,维生素D对人类健康特别是儿童健康具有重要意义。维生素D缺乏性佝偻病是由于缺乏维生素D引起体内钙磷代谢异常,钙盐不能正常沉着在骨骼生长部分,骨骼钙化不良而致骨骼病变,多见于婴幼儿,影响小儿生长发育,是我国儿科重点防治的四病之一。临床发现维生素D缺乏性佝偻病除导致骨骼病变外，同时也可影响神经、肌肉、造血及免疫等组织器官的功能，此引起了人们对维生素D生理作用及临床意义的极大兴趣，近年来对维生素D的研究取得了重大进展~([1-6])。
岷江上游杂谷脑河流域农业综合生产潜力研究

岷江上游是长江上游地区重要的生态屏障,区情特殊,生态位势重要。本研究选取岷江上游具有示范性、代表性的杂谷脑河流域作为研究区,在经典农业自然生产潜力研究的基础上,考虑影响作物产量形成的主要社会经济因素,计算出社会经济系数为1.508,对该区域的农业自然生产潜力进行修正。得到研究区农业综合生产潜力小麦为8 474.7 kg/hm~2,玉米为16 148.55 kg/hm~2,为定量评估杂谷脑河流域的农业资源利用程度提供了一种有效手段。并在农业综合生产潜力的基础上,估算杂谷脑河流域的土地资源可承载54 330人,为揭示当地人口、资源、环境与经济发展的相互作用机制及调控对策提供依据。
国际碳金融体系的探讨

国际碳金融体系的发展与建设是一个系统工程,由国际碳信用体系、国际碳交易体系、国际碳金融市场体系、国际碳金融服务体系和国际碳金融监管体系5个子系统构成。探讨国际碳金融体系对构建我国碳金融体系,争取国际碳交易定价的主动权和碳交易计价结算货币的参与权,推进人民币国际化进程具有重要意义。
我国农民参与新型农村社会养老保险现状调查——以湖北省武汉市新洲区为例

采用问卷调查法,以湖北省武汉市新洲区双柳街为例,对农民参加新型农村社会养老保险(简称新农保)的情况进行了调查。调查发现,农民主要通过村干部了解新农保,对新农保持肯定态度,对缴费标准基本满意,希望提高补助额度;平均每户有一半人参保,主要选择低缴费档,并呈多元趋势;示范村的农民、高文化程度、良好健康水平、非农职业的农民更倾向于参保。在此基础上就新农保政策的进一步完善和更好地落实提出建设性的意见,包括加强政策宣传,发挥大众传媒作用;重视农村"意见领袖";完善资金筹集和补助标准;增加农民收入,救助困难户,保证最需要人群不被边缘化。
我国小宗农产品市场调控机制研究——以绿豆为例

尽管当前因国家政策干预,以绿豆为代表的小宗农产品暂时恢复了平静,但产业发展中的一些突出问题依然在逐步累积,并有可能成为影响未来产业安全的隐患。对于是否调控绿豆市场的认识分歧较大,缺乏遏制投资垄断绿豆产业的具体抓手,市场基础设施以及监测体系不健全,农民种植存在一定的盲目性和趋同性。为此,建议要充分认识到稳定小宗农产品价格的重大意义,防止小宗农产品产业形成垄断型市场格局,建立权威公开的小宗农产品信息发布平台,引进气候指数来进行天气风险管理。
我国甘薯切蔓机发展概况与趋势分析

针对国内甘薯机械切蔓技术发展严重滞后的现状,简要介绍切蔓机的结构、工作原理和分类,从秧茎特性、秧蔓处理方式、自然因素、农机农艺结合等4个方面分析影响切蔓机作业性能的因素,阐述甘薯切蔓机的发展概况和国内外典型的机具,研究分析我国甘薯切蔓机落后的症结所在,并提出其主要发展趋势和对策。
基于CAN总线的联合收割机工作状态智能化监测系统研究

系统以实现联合收割机工作过程中的信息采集、传递、存储、显示为目的,将驾驶员所需的联合收割机行走速度、喂入量、谷粒总损失率、割台高度、脱粒滚筒转速、输粮搅龙转速、谷物籽粒流量等主要工作状态参数进行实时监测。终端选用S3C2410核心处理器,Linux2.4.10操作系统,各采集节点均选用STC89C52RC核心处理器;利用QTSDK技术实现终端界面设计,并具有历史数据保存和查询功能;基于CAN总线的二级分布式结构实现了终端与各分节点通信。通过运行调试,系统能够满足基本的实时性和可靠性要求。
江西省万安水库富营养化现状调查研究

江西万安水电站是江西省最大的水利枢纽工程,故万安水库的水质状况直接关系到当地乃至其下游的水环境安全和经济发展。于2008年7月和2008年10月在库区设置7个监测断面,采集水样进行分析,并结合不同的方法对万安水库的富营养化状况进行评价。水质监测结果表明,水库中叶绿素、总磷、总氮、透明度和高锰酸盐指数均超过GHZB1—1999《湖泊水库特定项目标准值》中的贫中营养标准。评价结果表明,万安水库水质未出现严重的富营养化现象,但已经达到中富营养化程度。
基于数据仓库的水稻精确栽培决策框架模型研究

随着农业技术的不断发展,水稻栽培科学发展目标已经从追求高产的单一目标阶段朝着追求高产、优质、高效、生态、安全综合目标迈进。特别是近年来国家对粮食安全的重视,追求该目标更加迫切。追求该目标必须走水稻精确定量栽培的路子。而用现代信息化去管理水稻精确定量栽培,必然会涉及到与农业相关的大量数据,这些数据涉及的因素比较复杂,而且具有多维、动态、变化、不确定性等特点,包括气象、土壤、病虫草害等可变因素,决定了水稻信息化管理的复杂性和难度。本研究结合水稻精确定量栽培,应用数据仓库技术来完成水稻精确定量栽培决策管理系统的任务,解决出现的一些相关技术问题。
湖州地区土壤有机氯农药残留特征

2010年4月间采集了浙江省湖州地区的18个土壤表层样品,使用GC-ECD方法测定样品中六六六、滴滴涕等有机氯农药的含量。研究范围内六六六和滴滴涕类有机氯农药检出率为100%。OCPs总残留量平均值为9.12ng/g,其中DDTs占总量的63%,是残留OCPs的主要成分。土壤中总有机碳与OCPs有显著的相关性。土壤中有机氯农药残留特征大体相同,同其他地区比较,残留水平偏低。区域内可能存在新的OCPs外源输入,须引起关注。对照国家《土壤环境质量标准》,采用单项污染指数法和综合污染指数法对土壤的有机氯污染指标进行了环境质量评价,结果表明该地区土壤环境质量总体优良。
江苏初霜冻期发生时空变化特征

利用江苏省35个观测站1961—2008年逐日最低温度资料,计算苏北西部、苏北沿海、宁镇扬和苏南地区初霜期、秋霜日数的年代际时空变化特征。结果表明:江苏初霜由北向南逐渐出现,同纬度地区内陆略早于沿海;秋霜日数北部明显多于南部。初霜发生日期具有明显的年代际变化特征,各区特早初霜期均出现在1991年之前,20世纪90年代之后,初霜期偏晚年份逐渐增多,各区特晚初霜期均出现在1994年之后。48年中,各区平均初霜期均呈现明显推迟的变化趋势,各区初霜期在1998年发生突变,突变后的平均初霜期比突变前延迟了6~10d。各区秋霜日数均呈现明显减少变化趋势,苏南地区在1996年、其他3个区在1998年发生突变,突变后的平均秋霜日数比突变前减少了2~5d。
榆耳胶原蛋白提取工艺研究

采用碱提法对榆耳废弃角料中胶原蛋白提取工艺进行研究。通过单因素试验以及正交试验确定了碱法提取榆耳胶原蛋白的最佳工艺条件:提取温度65℃、NaOH浓度0.50 mol/,L、提取时间4.5 h、料液比1:65,最高胶原蛋白得率为2.94%。
木瓜蛋白酶法提取青蒿多糖的工艺研究

为进一步优化青蒿多糖的提取方法,采用单因素试验和正交试验设计对木瓜蛋白酶法提取青蒿多糖的工艺进行研究,观察不同的温度(50、55、60℃)、不同的酶浓度(0.5%、1.0%、1.5%)、不同的pH值(6、7、8)对青蒿多糖提取率的影响,并对所提取的多糖理化性质和糖含量进行了测定。结果表明,在酶浓度为1.5%、酶解温度为50℃、酶解pH值为7.0时,木瓜蛋白酶提取多糖的量最多,糖含量也高。
甘薯绿原酸的提取及抑菌作用

研究甘薯不同器官绿原酸的提取及其提取液的抑菌作用。采用酸乙醇回流法从甘薯藤、叶和块根中提取绿原酸,紫外分光光度法测定其含量;用甘薯各器官的绿原酸提取液分别对大肠杆菌和金黄色葡萄球菌进行抑菌试验。结果表明,甘薯叶和藤提取液中绿原酸含量较多;甘薯各器官绿原酸提取液对金黄色葡萄球菌的抑制效果比对大肠杆菌的抑制效果明显。得出甘薯各器官绿原酸提取液对大肠杆菌和金黄色葡萄球菌均有抑制作用的结论。
不同基因型烤烟化学成分及致香物质差异研究

以云南省曲靖烟区5个不同基因型烤烟品种为材料,对烤后烟叶常规化学成分和中性致香物质含量进行了研究。结果表明,在5个基因型烤烟中部叶的常规化学成分中,总氮、烟碱、氯离子含量均在适宜的范围之内;总糖、还原糖和淀粉含量普遍偏高;钾离子含量普遍偏低。不同基因型烟叶的中性致香物质的种类基本相同,但含量却有很大差异,具体表现为KRK26>云烟97>云烟87>K326>NC297;不同基因型之间中性致香物质的类群也有很大的差异性。云烟87的苯丙氨酸类致香物质、棕色化产物类致香物质、类西柏烷类致香物质的含量明显高于其他品种;云烟97的类胡萝卜素类致香物质和KRK26的新植二烯含量最高;NC297的苯丙氨酸类致香物质、类西柏烷类致香物质、新植二烯含量明显低于其他品种;K326的类胡萝卜素类致香物质和云烟97的棕色化产物类致香物质含量最低。
利用凡纳对虾闲置温室进行的克氏原螯虾越冬及育苗试验

利用4个凡纳对虾养殖闲置温室大棚对克氏原螯虾越冬及育苗行为进行试验。结果发现:采用单层塑料薄膜的A池塘克氏原螯虾的成活率比单层塑料薄膜的B池塘高,自然状态下的空白对照D池塘克氏原螯虾的成活率比自然状态下的空白对照C池塘高;温室条件下的种虾成活率高于自然状态下,平均成活率提高了58%;温室条件下的出苗数量是自然状态下的1.8倍,出苗时间约提前了20 d。说明通过保温的办法可以促使克氏原螯虾提早产卵、孵化,用于生产。
真孕和假孕母犬激素水平的比较研究

选择自然发情的健康母犬25只分为2组,第1组15只母犬采用公犬进行自然配种,第2组10只母犬用输精管结扎的公犬进行自然配种作为假孕犬模型,2组母犬配种后20d采集血清分别测定孕酮、hCG、Leptin激素水平,在配种1个月后经B超诊断,选择第1组10只成功怀孕母犬和第2组的10只未孕母犬进行激素数值的统计分析。结果表明:配种后20d真孕组母犬与假孕组母犬的孕酮水平分别为(39.46±8.94)、(38.22±11.71)ng/mL,2组差异不显著(P>0.05);真孕组母犬的hCG和Leptin激素水平均极显著高于假孕组母犬(P<0.01)。结论:孕酮不宜作为母犬早孕的检测指标,hCG和Leptin激素可能是判别母犬真假孕的激素指标。
新疆打瓜白粉病菌寄主范围测定及防治药剂筛选

对打瓜白粉病菌进行了寄主范围测定及药剂筛选试验。结果表明:该病菌除可侵染打瓜、西瓜、冬瓜外,还可侵染绿豆、豌豆、番茄、茄子,但不侵染丝瓜、苦瓜、辣椒、豇豆、莴笋、小麦等作物;供试的8种药剂均对打瓜白粉病菌分生孢子有一定的抑制作用,其中50%醚菌酯干悬浮剂、40%多·锰锌可湿性粉剂抑制孢子萌发的效果最好,抑制率达到100%。
1000亿活芽孢/g枯草芽孢杆菌可湿性粉剂对马铃薯晚疫病的防效

为验证1 000亿活芽孢/g枯草芽孢杆菌可湿性粉剂对马铃薯晚疫病的防治效果,连续2年对该药剂进行了田间药效试验。结果表明,1 000亿活芽孢/g枯草芽孢杆菌可湿性粉剂对马铃薯晚疫病具有很好的防治效果,其防效在75.30%~92.98%之间,并且能提高马铃薯产量,增产率最高可达41.14%。
干旱胁迫对小麦济麦20扬花期叶片生理特性的影响

采用盆栽试验,研究了干旱胁迫对济麦20扬花期叶片生理特性的影响。结果表明:在扬花期,随干旱胁迫程度的加剧,济麦20叶水势、叶片相对含水率、叶绿素a、叶绿素b和叶绿素总量均呈降低趋势;叶片可溶性糖含量、脯氨酸含量、膜透性以及SOD、POD活性则均呈增加趋势。说明在扬花期干旱胁迫对济麦20叶片的生理特性具有显著影响,济麦20则通过内部生理特性的调节以适应干旱逆境。
基于优化ACGM标记的甘蓝型油菜大籽粒材料聚类分析

利用从44对优化的ACGM引物中选出18对标记对16份油菜大籽粒材料和4份小籽粒材料进行聚类分析。聚类结果显示20份材料在相似系数0.6处分为A、B、C 3个类群,其中A、B类又可在相似系数0.67处分为A1、A2、A3、B1、B2 5个亚群。这18对引物分别稳定扩增出2~6条特异条带,扩增差异明显,多态性丰富,重复度高,表明优化的ACGM标记在甘蓝型油菜中具有良好的通用性。
牡丹品种凤丹白子叶离体再生研究

探讨了不同的消毒方式及消毒时间对牡丹成熟胚萌发诱导的影响,以及不同的植物生长调节物质、培养时间和蔗糖浓度对牡丹子叶愈伤组织诱导、增殖分化及分化苗生根的影响。结果表明,牡丹种子的最佳消毒方法是在0.1%HgCl2中消毒10 min;牡丹子叶在MS+2 mg/L 2,4-D+0.5 mg/L 6-BA+3%蔗糖配方的培养基中出愈率最高,为93%;牡丹子叶来源的愈伤组织在MS+1.0 mg/L 2,4-D+0.5 mg/L 6-BA+3%蔗糖配方的培养基中培养60 d时的分化情况最好,分化率达到78%;在附加了0.2 mg/L 6-BA+1.0 mg/L IBA和2.5%蔗糖的1/2MS培养基中,再生苗的生根率可达56%,平均根数4.25条,平均根长4.31 cm。
江苏省油菜生产现状及发展对策

在总结江苏省油菜生产现状的基础上,从技术、经济、措施等方面分析了影响油菜生产的因素,提出恢复发展油菜生产的对策和建议,包括加大政策扶持力度、加强农机农艺结合技术研究、加强农机装备技术攻关研究等。
A facile and one-pot electrochemical method for the synthesis of a new anthraquinonethioether

The reaction of electrochemically generated anthradiquinone as a Michael acceptor with 2-mercaptobenzothiazole and 2- mercaptobenzoxazole,as nucleophiles in ethanol/water mixtures has been studied by means of cyclic voltammetry.Our voltammetric data indicate that produced anthradiquinone participates in Michael addition reaction with nucleophiles and via an ECEC mechanism converts to the new anthraquinonethioether derivatives.Based on an EC mechanism,the observed homogeneous rate constant of the Michael reaction of anthradiquinone with nucleophiles were estimated by comparing the experimental cyclic voltammograms with the digital simulated results.
Ageing management strategies for instrumentation and control equipment in NPPs

This paper aims to explain main ageing stressors and effects on instrumentation and control (I&C) components followed by ageing management strategies through developed design such as using freewheeling diode to eliminate relays contact ageing due to inductive loads, or through traditional practices and new online monitoring where I&C components can be checked and assessed remotely while the plant is operating. It also includes some recommendations for obsolescence management for special I&C components like microcontrollers and programmable logic controllers (PLCs).
紫芝多糖GS-A-1的结构鉴定与生物活性研究

目的从紫芝液体深层发酵菌丝体精制多糖GS-A中进一步分离得到单一组分多糖GS-A-1,并研究其结构和生物活性。方法采用柱层析结合高效液相色谱分离,经HPGPC确定其分子量并证明该多糖组成的均一性。运用HPLC,高碘酸氧化和Smith降解,红外光谱及核磁共振光谱进行结构鉴定,同时通过荷瘤小鼠血常规检测初步评价其对环磷酰胺所致机体损伤的保护作用。结果GS-A-1为单一组分的杂聚多糖,分子质量为21 190 Da,是一个由α-L-吡喃半乳糖和α-L-吡喃甘露糖通过(1→2),(1→6)连接而成,其摩尔比为半乳糖∶甘露糖=1.7∶1,且GS-A-1对环磷酰胺引起的化疗损伤具有保护作用。结论GS-A-1为首次从紫芝液体深层发酵菌丝体的粗多糖中分离得到的在抗肿瘤药物中有应用价值的活性多糖。
响应面法优化枳壳中总黄酮超声辅助提取工艺

目的对超声辅助提取枳壳中总黄酮的工艺条件进行优化。方法通过单因素试验,考察乙醇体积分数、液固比、超声时间和超声功率等因素对超声辅助提取枳壳总黄酮过程的影响。并在此基础上,进行Box-Behnken中心组合设计,以枳壳总黄酮提取得率为响应值,采用响应面分析法研究各因素及其交互作用对枳壳总黄酮提取得率的影响。结果实验优化得出超声辅助提取枳壳中总黄酮的最佳工艺条件为乙醇体积分数58%、超声功率317 W、超声提取时间28min。结论在上述条件下,枳壳总黄酮的得率可以达到15.44%,与模型预测值基本一致。
中性粒细胞弹性蛋白酶天然抑制剂及其筛选方法的研究进展

目的人中性粒细胞弹性蛋白酶(HNE)和内源性人中性粒细胞弹性蛋白酶抑制剂(HNEI)的失衡可引发许多以HNE为中介的疾病,因此HNE已作为众多研究的热点靶标,以寻求潜在有效的HNEI。在对内源性和化学合成HNEI进行简单介绍的同时,主要对可以抑制HNE的活性或释放的天然化合物进行综述,并总结了国内外研究者筛选天然HNEI的主要研究方法。
体外冲击波治疗足底筋膜炎的临床疗效分析

足底筋膜炎是最常见的足部疼痛,有报道表明足底筋膜炎占足部疾病的大约11%—15%。足底筋膜炎的病因仍不明确,但是研究表明肥胖、年龄、外伤、过度运动、不合适的鞋子可能是病因。目前治疗足底筋膜炎的方法有很多,例如物理因子、注射治疗、牵拉、支具和手术等,但是一部分患者疗效欠佳,手术费用较高、恢复时程较长且有并发症的风险。冲击波疗法(extracorporeal shock wave therapy, ESWT)是20世纪80年代出现的一种新的物理治疗技术,体外冲击波治疗首先用于治疗肾及输尿管结石,目前已成为结石的标准治疗方法。因冲击波疗法具有无创伤性和操作方便等特点,近年来被广泛应用于治疗各种软组织疼痛。2000年，美国食品药品管理局批准应用液电式冲击波治疗慢性足底筋膜炎。本研究旨在观察体外冲击波治疗足底筋膜炎的临床效果并进行研究分析,现报告如下。
Summarizing Large-Scale Database Schema Using Community Detection

Schema summarization on large-scale databases is a challenge.In a typical large database schema,a great proportion of the tables are closely connected through a few high degree tables.It is thus difficult to separate these tables into clusters that represent different topics.Moreover,as a schema can be very big,the schema summary needs to be structured into multiple levels,to further improve the usability.In this paper,we introduce a new schema summarization approach utilizing the techniques of community detection in social networks.Our approach contains three steps.First,we use a community detection algorithm to divide a database schema into subject groups,each representing a specific subject.Second,we cluster the subject groups into abstract domains to form a multi-level navigation structure.Third,we discover representative tables in each cluster to label the schema summary.We evaluate our approach on Freebase,a real world large-scale database.The results show that our approach can identify subject groups precisely.The generated abstract schema layers are very helpful for users to explore database.
2011/2012年冬季气候对农业生产的影响

2011/2012年冬季(2011年12月-2012年2月),全国大部平均气温偏低,降水区域性差异较大。北方冬麦区大部初冬气温下降平稳,冬小麦抗寒锻炼充分,加之底墒良好,冬小麦安全越冬。北方牧区1-2月出现强降雪过程,部分地区遭受雪灾。南方大部初冬天气条件较好,土壤墒情适宜,利于油菜、冬小麦等作物生长和设施农业生产;1-2月低温阴雨(雪)天气偏多,导致蔬菜、瓜果产量和品质下降,油菜发育期偏晚,春茶上市时间推迟,部分地区出现渍害、冻害和寒害,但有效降水改变了2011年夏秋季降水持续偏少的状况,增加了湖库蓄水;云南中部和北部、四川南部出现轻至中旱,部分地区冬小麦、油菜、蚕豆等小春作物受旱严重。
SketchUp大区域三维建模技术研究

利用SketchUp软件能高效建模的特质,进行大区域的三维建模。对建模过程中涉及的思路进行探讨,针对其存在的一些问题和可以优化的方法进行介绍。利用SketchUp和Skyline的组合,实现了大范围三维建模和成果应用。
基于遥感与GIS技术的景观格局自相似性的尺度效应研究——以防城港市为例

利用遥感与GIS技术,研究防城港市景观格局自相似性对空间尺度的响应特征。结果表明:景观格局自相似性具有空间尺度依赖性,景观类型的分维数均随空间粒度的增大而减小;不同景观类型的自相似性对尺度的响应敏感点不同,50~60 m为研究区各景观类型的自相似性尺度;随着空间粒度的增大,建设用地、水域和其他用地的分维数差异缩小,而耕地和林地分维数的差异却增大。
三频GNSS系统伪距多径提取算法性能分析及比较

分析利用多频载波相位提取伪距多径的一般算法,并推导通用的计算方程组。针对三频GNSS系统,推导双频一阶多径提取算法的通用计算公式,并提出基于最小方差准则的三频一阶多径提取算法,证明双频一阶多径提取算法是三频一阶多径提取算法的一种特殊形式。对几种多径提取算法的误差放大倍数进行比较分析,最后用北斗系统的实测数据进行验证。理论分析和实测数据验证表明,三频一阶多径提取算法略优于双频一阶多径提取算法,这两者都明显优于三频二阶多径提取算法。
Augmented growth of long pepper in response to arbuscular mycorrhizal inoculation

Arbuscular mycorrhizal (AM) technology is a soil-based fertilization practice for sustainable crop productivity. We evaluated six indigenous Arbuscular mycorrhizal fungi (AMF) strains for their symbiotic response with Piper longum (long pepper), a non-timber forest product holding promise as a commercial crop for its medicinal fruits and roots. Piper saplings were raised in a 10 cm thick sand and soil mix inoculated with various AMF. Under field conditions, plants inoculated with AMF demonstrated better survival (≥80%) than non mycorrhizal plants (58%). Almost all the studied AMF strains increased the plant growth, biomass and nutrient content (N and P) over the uninoculated control. Mycorrhizal inoculation with four AMF species, viz: Glomus fasciculatum, G. clarum, G. etunicatum and G. versiforme greatly enhanced long pepper growth both in the nursery and field conditions.
Comparison of sustainable forest management (SFM) trends at global and country levels: case study in Iran

Sustainable Forest Management (SFM) is an integral component of sustainable development. Iran is a Near East country with low forest cover. Iran uses 7 criteria and 65 indicators for regional and national monitoring of forest management. We evaluated the status of SFM in Iran, and a location imaging in its path towards SFM was provided by existing validation data and library references for the Criteria and Indicators (C&I) adopted in the Near East, We identify challenges and opportunities associated with SFM in Iran. Although the information to evaluate the trend of SFM in Iran was incomplete, we compiled some information on the basis of C&I. Comparison of some indicators with the values for the rest of the world revealed that the situation in Iran is very different. Although some indicators revealed a better situation in Iran, Iran lags the rest of the world in the implementation of SFM. Iran, like many countries, is trying hard to find ways to sustainably use its forests. Not all C&I for assessment of SFM in Iran have been determined or defined. However, a consistent and comprehensive framework of criteria and indicators to monitor progress towards SFM is being applied. Defining some C&I is still at an early stage.