mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
发展以燕麦为支柱产业的可持续高寒草地畜牧业

针对我国青藏高寒草地畜牧业的生产现状,探讨了青藏高原高寒牧区燕麦Avena sativa品种繁育、人工草地建植和草产品加工以及以舍饲为主放牧为辅的新型集约化草地畜牧业生产模式的建立,为发展以燕麦为支柱产业的可持续高寒草地畜牧业提供理论依据.
太空环境诱变苦荬菜的细胞学效应研究

对卫星搭载的2种苦荬菜Lactuca indica种子SP1代根尖细胞染色体变异进行了研究。结果表明,太空环境诱变处理后提高了苦荬菜种子的根尖细胞有丝分裂指数,出现了包括微核、染色体桥、染色体断片等在内的多种类型的染色体变异。早熟苦荬菜对太空环境诱变的敏感性大于晚熟苦荬菜.
无人机载多光谱成像仪图像配准的一种方法

无人机载小型多光谱成像仪是一种小型化的多镜头多光谱成像仪.采用重心法对平行光管出射光在该成像仪各通道所成像点作亚像元定位,得到精度高、分布均匀的大量控制点对,有效的实现了多光谱图像的配准处理.
凝视型红外光电成像系统主要参数的实验室测评分析

综合阐述了凝视型红外光电成像系统实验室主要参数测评,并对最小可分辨温差MRTD、系统调制传递函数MTF和噪声等效温差NETD等参数的测试方法进行了陈述,给出了具体测试实验过程和实验结果,对影响测试结果的因素进行了分析.
生草葡萄园土壤微生物分布及土壤酶活性研究

为了探讨生草对葡萄园土壤肥力的影响,采集葡萄试验园行间播种高羊茅、紫花苜蓿、白三叶草区域不同土层土样,以清耕土样为对照,对土样中的土壤酶活性和微生物数量分布进行了研究.结果表明,随土层深度的增加,各处理土壤微生物数量及酶活性均呈递减趋势;生草区域土壤微生物总量普遍高于清耕(对照),其中以细菌为主,其数量占土壤微生物总量的90%以上,纤维素分解菌数量最少,占土壤微生物总量的不到1%;紫花苜蓿处理土壤中蔗糖酶、脲酶、磷酸酶、纤维素酶活性是其他3个处理的1.15～2.23,1.10～2.17,1.70～3.21,1.03～1.30倍;过氧化氢酶随土层的变化不明显;经相关分析发现,除过氧化氢酶与土壤微生物未表现出相关性外,其他土壤酶活性与土壤微生物之间绝大部分都呈极显著正相关(P＜0.01).由此得出,葡萄园生草可以改善土壤的肥力状况,其中行间播种紫花苜蓿最为适宜.
普罗布考下调氧化型低密度脂蛋白诱导THP-1巨噬细胞ATP结合盒转运体A1的表达

目的 观察普罗布考对氧化型低密度脂蛋白诱导THP-1巨噬细胞ATP结合盒转运体A1表达的影响.方法 用逆转录聚合酶链反应、免疫荧光分别检测ATP结合盒转运体A1 mRNA水平和蛋白的表达.结果 用氧化型低密度脂蛋白(100 mg/L)分别孵育细胞0、12、24及48 h,实验结果发现ATP结合盒转运体A1 mRNA水平呈时序上调;用50 μmol/L普罗布考预处理细胞4 h,再用氧化型低密度脂蛋白孵育48 h,普罗布考加氧化型低密度脂蛋白(100 mg/L)处理组与氧化型低密度脂蛋白(100 mg/L)处理组ATP结合盒转运体A1 mRNA水平无明显差异,但免疫荧光检测发现普罗布考加氧化型低密度脂蛋白(100 mg/L)处理组ATP结合盒转运体A1蛋白表达下调.结论 普罗布考下调氧化型低密度脂蛋白诱导THP-1巨噬细胞ATP结合盒转运体A1蛋白的表达.
姜黄素对动脉粥样硬化兔基质金属蛋白酶9的影响

目的 研究姜黄素对动脉粥样硬化兔主动脉基质金属蛋白酶9表达的影响.方法 将30只雄性日本大耳白兔给予高脂饲料喂养2个月.成功复制动脉粥样硬化模型兔20只,随机分成两组,治疗组给予姜黄素200 mg/(kg·d)灌胃,对照组每日给予生理盐水灌胃,均以基础饲料喂养,共治疗1月.采血检测血浆总胆固醇、甘油三酯、低密度脂蛋白胆固醇和高密度脂蛋白胆固醇水平变化;兔处死后取主动脉观察粥样斑块面积比;取主动脉弓做病理切片,进行光镜检查,用免疫组织化学检测主动脉壁基质金属蛋白酶9的表达.结果 姜黄素治疗组血浆甘油三酯、总胆固醇、低密度脂蛋白胆固醇水平与对照组相比显著降低,高密度脂蛋白胆固醇水平显著升高(P＜0.05).姜黄素治疗组斑块面积/主动脉面积比显著低于对照组(P＜0.05),基质金属蛋白酶9免疫组织化学染色强度、阳性细胞率、总积分均低于对照组.结论 姜黄素可以显著降低动脉粥样硬化兔主动脉壁基质金属蛋白酶9的表达,抑制动脉粥样硬化的形成.
尾加压素Ⅱ促进大鼠主动脉合成和分泌内皮素1的机制研究

目的 研究尾加压素Ⅱ刺激大鼠主动脉组织产生和分泌内皮素1的作用及其细胞内信号机制.方法 将大鼠主动脉组织薄片和不同浓度尾加压素Ⅱ(10-10～10-7 mol/L)共孵育3 h或6 h,采用放射免疫法测定组织和孵育液中内皮素1含量;向孵育液中加入不同阻断剂,观察对尾加压素Ⅱ诱导内皮素1合成效应的影响,初步探讨尾加压素Ⅱ作用的细胞内机制.结果 尾加压素Ⅱ明显刺激内皮素1的分泌(孵育液含量)和产生(孵育液和组织内皮素1含量总和),呈现时间和浓度依赖性(10-10～10-7 mol/L).孵育3 h后,尾加压素Ⅱ(10-8 mol/L)组内皮素1分泌量较对照组高1.46倍 (P＜0.01),产生总量较对照组高87.9% (P＜0.01);孵育6 h后,尾加压素Ⅱ刺激组(浓度分别为10-10、10-9、10-8 mol/L和10-7 mol/L)内皮素1分泌量分别较对照组增加59.2%,108.0%,159.6%和178.0%,产生总量分别较对照组增加40.6%,68.4%,103.1% 和105.7%(P＜0.01).尾加压素Ⅱ促进内皮素1产生的作用能分别被Ca2+通道阻断剂尼卡地平、蛋白激酶C阻断剂H7、丝裂素活化蛋白激酶抑制剂PD98059、mRNA抑制剂放线菌素D以及蛋白合成抑制剂环磷酰胺所抑制,其中对内皮素1分泌作用的抑制率分别为34.1%,24.5%,32.2%,32.1%和27.6%(P＜0.01),对内皮素1产生总量的抑制率分别为33.5%,31.5%,25.8%,28.0%和36.8%(P＜0.01).结论 尾加压素Ⅱ能够促进主动脉组织合成和分泌内皮素1,该作用可通过Ca2+通道、蛋白激酶C以及丝裂素活化蛋白激酶途径来实现,并提示尾加压素Ⅱ的缩血管等效应有可能通过促进内皮素1的产生来实现.
大连青年腰椎和股骨近端骨密度的调查

目的 探讨大连地区青年骨密度现状及运动对骨密度的影响,为骨质疏松预防提供科学依据.方法 采用双能X线吸收法,测量了大连市内486名(男性266,女性220)健康汉族青年的第2～4腰椎椎体、股骨颈、Ward三角和大转子的骨密度,并测量其身高和体重.结果 (1)大连青年第2～4腰椎椎体、股骨颈、Ward三角和大转子的骨密度男性分别为1.107、1.028、0.901和0.883,女性分别为0.978、0.963、0.859和0.847,男性明显大于女性并差异有显著性(P＜0.05).(2)大连男女青年中经常参加运动的骨密度比不参加运动的骨密度高,并差异有显著性(P＜0.05).(3)大连男女青年的骨密度总体低于内陆地区,高于南方地区.(4)大连男女青年身高、体重及体重指数与骨密度呈正相关.结论 大连青年骨密度处中下水平,骨密度有明显的性差,运动有利于增加骨密度.
金属氧化物改性滤料过滤去除水中残余铝的效能与机理研究

采用连续流等速过滤试验方法研究了金属氧化物改性滤料对水中残余铝的去除效能,并探讨其过滤机理.研究结果表明,金属氧化物改性滤料较石英砂能够更有效地过滤去除沉后水中的残余铝,对颗粒铝和溶解铝都有很好的去除效果.石英砂对颗粒铝具有较好地去除效果,而对溶解性铝的去除能力较差.改性滤料的表面性质更有利于水中残余铝的去除.
平湖市古横桥水厂扩建工程调试和运行

古横桥水厂扩建工程经前期调试后,在运行供水88 d内,原水CODMn平均10.55 mg/L,最高15.12 mg/L,NH3-N平均2.68 mg/L,最高5.31 mg/L,色度平均41度,最高55度,通过生物接触氧化预处理+强化常规处理+两级臭氧-生物活性炭深度处理,出厂水中上述指标均达到卫生部《生活饮用水卫生规范》和建设部《城市供水水质标准》要求.简要介绍了工艺调试和运行情况.
生物助剂在制浆废水处理中的应用研究

对某制浆厂生产废水处理系统投加由多种酵素混合而成的生物助剂前后的运行效果进行详细分析.结果表明:在工艺运行参数不变的条件下,使用生物助剂能够提高生物处理系统的生物活性,增加活性生物量,使生物处理系统对CODCr、SS、色度去除率分别提高16%、17%、27%,降低了化学处理单元药剂使用量,增强了生物处理系统的耐冲击负荷能力,降低了水处理成本,对生物助剂在制浆废水处理中应用具有重要的推动作用.
城市公共用水的节水和污水再生利用潜力分析

城市公共用水的管理与需求控制是城市水资源可持续利用的必然要求.基于终端用水分析原理,建立了公共用水部门节水与污水再生利用综合评估模型(MWUM模型).在此基础上,以北京市为例,分析了其公共用水潜力的结构、技术与经济特征.北京市公共各行业用水结构基本保持稳定,机关用水所占比重较大;节水率较大的宾馆和院校的单位节水成本最小,是城市公共节水的重点领域;污水再生利用的单位成本与节水成本具有可比性,节水与再生水利用应统筹考虑.
基于Contourlet广义高斯模型的纹理图像检索

Contourlet变换结合了不可分离的方向滤波组,具备小波所不能表达的多方向特性,能有效捕获自然图像的边缘轮廓信息.本文分析了图像Contourlet系数的统计特征,并利用广义高斯函数对各子带系数层进行建模.将此模型应用于基于VisTex的自建纹理图像库,采用矩匹配估计法,提取模型参数集,运用K-L距离计算图像间的相似度.对800幅纹理图像进行检索,本文方法比传统小波方法的平均检索查准率高出约2%到10%不等.实验结果表明,该方法改进了导向纹理的描述.
SVM在多源遥感图像分类中的应用研究

在利用遥感图像进行土地利用/覆盖分类过程中,可采用以下两种途径来提高分类精度:一是通过增加有利于分类的数据源,引人地理辅助数据和归一化植被指数(NDVI)来进行多源信息融合;二是选择更好的分类方法,例如支持向量机(SVM)学习方法,由于该方法克服了最大似然法和神经网络的弱点,非常适合高维、复杂的小样本多源数据的分类.为了提高多源遥感图像分类的精度,还研究了支持向量机在遥感图像分类中模型的选择,包括多类模型和核函数的选择.分类结果表明,支持向量机比传统的分类方法具有更高的精度,尤其是基于径向基核函数和一对一多类方法的支持向量机模型更适合多源遥感图像分类,因此,基于支持向量机的多源土地利用/覆盖分类能大大提高分类精度.
一种基于视图分类的3维模型检索方法

3维模型检索是近年来基于内容检索的研究热点.在基于2维草图检索3维模型的研究中,通常没有结合人的知识.为了提高3维模型检索的精度,提出了一种基于视图分类的3维模型检索方法,它的主要思想是通过视图分类将人对3维模型的认知变换为对2维视图的理解,以便在度量2维草图与视图之间的相似性时能利用人的知识.该方法涉及以下2个问题:视图分类、2维草图与视图之间的相似性度量.实验结果表明,该方法能提高检索精度,因此可应用在2维草图查询方式的3维模型检索中.
基于改进活动轮廓的视频对象自动分割及跟踪算法

为了能够从视频序列图像中准确地提取出运动视频对象,提出了一种基于改进活动轮廓的视频对象自动分割及跟踪方法.该方法首先采用连续帧间差的4次统计量假设检验来确定视频对象的运动区域,并使用形态滤波消除残余噪声和空洞;然后根据3帧序列图像得到的前后运动区域的相与运算来有效地解决运动视频对象前后帧的遮挡问题,以获得视频对象模板,当提取出视频对象模板的边缘轮廓后,再用梯度向量流场作为外力的改进活动轮廓算法来获得视频对象的精确轮廓;最后以此视频对象的轮廓为基础进行运动补偿,以得到下一帧图像的初始曲线,再使用改进的活动轮廓算法对下一帧图像进行分割,即可实现视频对象的跟踪.该方法不仅能够消除差分图像中的显露背景,得到运动视频对象精确的轮廓,并且可进行多目标的分割与跟踪.
基于区域特性选择的遥感图像融合方法

提出了一种新的遥感图像融合方法,其基本思想是首先对多光谱遥感图像(MS)进行IHS变换得到IHS色彩空间的I、H、S分量;然后将高分辨率全色图像和MS的I分量进行3层小波变换,并采取基于区域特性选择的融合算子对小波系数进行选择,然后经小波逆变换重构得到新的强度分量I′;最后将I′、H、S进行IHS逆变换得到融合后的图像.此外,文中引入了相关系数,相对平均光谱误差指数(RASE),相对整体维数综合误差(ERGAS)对融合图像的光谱质量进行评价,使用将融合图像与高分辨率全色图像分别经过拉普拉斯滤波器的滤波以提取细节信息,然后计算相关系数的方法对融合图像的空间细节质量进行评价.实验结果表明,本文算法在光谱质量的改善方面明显优于IHS及一些经典的小波变换遥感图像融合算法.
基于STEP-NC的CNC系统中NURBS插补技术研究

STEP-NC是一个用来实现CAD/CAM与CNC系统间数据交换的接口标准,基于STEP-NC的CNC系统是未来数控技术发展方向之一,该系统不但具有直线和圆弧插补功能,而且还具有样条曲线插补功能.为此设计了一个统一的基于NURBS样条曲线插补的通用插补器,并开发了一种基于等弧长的插补技术和插补算法.最后通过仿真和实例加工验证了该算法的有效性和可靠性.
基于SVD的相位相关方法在空间运动目标检测中的应用

相位相关方法是在两幅相似图像之间检测纯平移运动的一种比较传统的直接估计法,但由于它庞大的计算量使它无法满足实时系统的要求,并且它只能进行整数平移值的检测,因此需找到一种更好的运动估值方法.由于相位相关矩阵在没有噪声干扰的纯平移运动中是一个秩为1的矩阵,所以根据这一性质,提出了一种低复杂度的亚像素平移运动检测方法--基于奇异值分解(SVD)的相位相关方法.该方法是根据傅里叶变换的平移性质,利用最小二乘法进行线性度估计,其运算速度较传统的相位相关方法提高了近3倍.由于它利用的是频域的相位信息,对图像灰度不敏感,因此它具有很强的噪声抑制能力和抗遮挡能力,使它不仅更适合应用于受噪声和云层污染严重的空间目标的平移检测,而且能实现空间目标的精确定位.
基于小波包变换和离散余弦变换的双水印算法

为了使水印具有更强的鲁棒性和更广泛的适用性,提出了一种基于小波包变换(WPT)和离散余弦变换(DCT)的双水印算法.该算法是在WPT域和DCT域,结合人眼视觉特性(HVS)在宿主图像小波包分解的高低频带,选择不同的方法分别嵌入一个水印,由于双水印充分利用了小波包高低频域的不同抗攻击能力和DCT域的聚能、去相关能力,从而增强了算法的鲁棒性.仿真实验表明,该双水印算法不仅具有较强的鲁棒性和不可视性,并有较大的水印添加容量和更广泛的适用性.
完全性大动脉转位手术前诊断和治疗的临床分析

目的 探讨完全性大动脉转位(DTGA)的术前诊断、治疗及手术预后.方法 回顾性分析经过超声心动图和/或心血管造影明确诊断,并予球囊房隔造口术(BAS)和/或外科手术治疗的41例D-TGA病例的临床资料.结果 所有病例均经心超检查确诊为D-TGA,27例术前经心血管造影检查,其中显示分别在左、右肺动脉分叉处及各级分支有不同程度的狭窄者5例,右冠状动脉走行异常、双侧动脉导管未闭、主动脉弓降部狭窄各1例,心超未能显示.7例患儿术前经BAS,术后精神反应好转,紫绀减轻,SPO2从50%～70%上升至80%以上.30例患儿接受外科手术治疗,在21例接受大动脉转位手术治疗死亡的12例中,5例存在冠状动脉畸形,术后心肌供血不足,占41.7%.结论 (1)超声心动图与心血管造影有机结合可提供全面准确可靠的信息,提高手术成功率.(2)对室间隔完整的D-TGA(TGA/IVS)危重患儿尽早进行BAS可明显改善低氧血症及代谢性酸中毒,为进一步外科手术争取时间.(3)冠状动脉的畸形是大动脉转位手术的高风险因素之一,术前充分了解冠状动脉的情况,对改善预后有一定帮助.
肘关节外翻稳定性的解剖与生物力学研究

目的 探讨影响肘关节外翻稳定性的相关解剖学因素.方法 成人上肢尸体标本8侧,解剖观察屈曲-旋前肌群、尺侧副韧带后束、尺侧副韧带前束和桡骨小头解剖特点;另用12侧上肢标本,随机分成两组,两组按不同顺序切断有关的结构,通过特制的生物力学装置,测量两种不同情况下肘关节的外翻稳定性.结果 逐级切断各组内侧结构,其外翻角度增加无显著意义(P＞0.05).同时切除桡骨小头,外翻角度达到最大,外翻角度增加有显著意义(P＜0.05).在止点切断尺侧副韧带前束,外翻角度达到最大.桡骨小头切除的同时切断内侧结构尤其是切断尺侧副韧带前束,外翻角度显著增加(P＜0.05).结论 肘关节外翻稳定结构主要由桡骨小头和尺侧副韧带来维持,肘关节内侧前臂肌起协同作用.
脑动脉瘤术后症状性血管痉挛发生的影响因素分析

目的 对脑动脉瘤术后患者血管痉挛发生的影响因素进行分析,寻找保护因素.方法 选取2004年10月至2006年3月就治于苏州大学附属第一医院神经外科的动脉瘤性蛛网膜下腔出血患者共计82例,随机进入依达拉奉治疗组(n=41)和常规治疗组(n=41).常规治疗组于发病后3 d内手术夹闭动脉瘤,并尽可能清除基底池的血块;依达拉奉治疗组在确诊后即给予依达拉奉30 mg,静滴,2次/d,共14 d.其余治疗同常规治疗组.详细观察并记录患者每天的病情变化、Glasgow评分和入院时的Fisher分级、Humter's分级及术后患者症状性血管痉挛的发生情况.对所有患者症状性血管痉挛的发生情况按患者的年龄,入院时的Fisher分级、Hunter's分级、依达拉奉治疗的应用、患者的性别等进行Logistic多因素逐步回归分析.结果 两组症状性血管痉挛发生率分别为:依达拉奉组14.63%,常规治疗组36.59%.Logistic多因素逐步回归分析显示入院时的Fisher分级、Hunter's分级和依达拉奉治疗等变量进入模型(P＜0.05).其中患者入院时的Fisher分级、Hunter's分级的OR值(多变量调整后的优势比)分别为6.55和5.62,均大于1,提示这两者均为症状性脑血管痉挛发生的危险因素;而依达拉奉的OR值为0.11＜1,提示其为症状性血管痉挛发生的保护因素.结论 多个因素影响脑动脉瘤术后症状性血管痉挛的发生,其中患者入院时的Fisher分级、Hunter's分级为危险因素,分级越高,越容易发生血管痉挛,而依达拉奉治疗为一保护因素,与常规治疗联合应用可更好地预防症状性血管痉挛的发生.
高强度聚焦超声对复发性后腹膜肉瘤的疗效及其与超声影像变化的关系研究

目的 探讨高强度聚焦超声(HIFU)对复发性后腹膜肉瘤的疗效及其与超声影像变化的关系.方法 应用FEP-BY01型HIFU肿瘤治疗机治疗118例后腹膜软组织肉瘤术后复发患者,根据临床症状、肿瘤大小、B超评价HIFU疗效,初步了解B超声像图的变化与HIFU疗效的关系.结果 显效率为55.6%(10/18),有效率为33.3%(6/18),无效率为11.1%(2/18);临床治疗显效及有效的16例中,14例以B超声像图上回声增强为主要表现.结论 取治疗前、后声像图对照,回声增强提示HIFU治疗有效,与临床疗效相一致,有利于指导下一步的治疗.
基于迭代学习的PID控制研究

本文利用迭代学习控制过程记忆的期望控制ud(t)、期望轨迹yd(t)以及跟踪误差ek(t)提出了拟合系统PID控制器参数的方法.这种方法实现的PID控制器结构简单,作用于系统可获得较佳的动态特性和较强的鲁棒性.仿真实例表明,这种方法具有很好的可行性和实用性.
核聚类人工免疫网络的参数研究

核聚类人工免疫网络是一种新型的聚类分析方法,其基本算法形式也是启发式随机搜索算法,所以算法中的参数对于方法的最后性能有着重要影响.本文通过实验探讨几个关键参数对算法性能的影响,从而说明算法中参数的选择方式.
基于LDAP的对象存储系统元数据的组织与管理

本文介绍了面向对象系统中元数据服务器的设计及元数据的组织和管理.该系统中元数据服务器使用了轻量级目录访问协议(LDAP)作为存放元数据的平台,针对这个平台设计了相应的数据分配算法和数据转换模块,并对其性能进行了分析和优化.
利用UML-RT序列图支持基于事务的SoC系统级功能验证

SoC基于事务的验证方法面临的一个重要问题是如何设计验证系统级复杂交互行为的事务测试序列.基于场景的序列图是设计人员捕获系统级功能规约的良好方法.本文提出了一种利用UML-RT序列图捕获SoC各个IP核之间的通信协作行为,为基于事务的验证建立高层规约,指导系统级测试序列生成的方法.我们自行开发了一个基于构件的事务验证环境SoC-CBTVE,并在该环境中利用本文的方法对一个典型的SoC设计进行了验证和分析.实验结果表明,利用UML-RT序列图能够捕获SoC系统级IP核之间的复杂通信行为,有效支持SoC系统级功能验证.
一种改进的ICMP差错报文处理的IPSec协议

本文分析了IPSec协议在通道模式下对ICMP差错报文不能正确转发的问题,并对原IPSec协议进行改进,提出了一种对SA改进的IPSec解决方案.改进后的方案能够在保持原IPSec特性的基础上解决该问题,并能够与已有的IPSee实施方案兼容.
蓝牙无线个人局域网的拓扑优化

本文提出了一种蓝牙无线个人局域网(BT-WPAN)的拓扑优化方法.该方法是基于BT-WPAN技术的一个约束模型.通过使用min-max公式表示,它提供全网的连通性;通过最小化网络中最拥挤的节点的通信量负载,实现通信量的需求和系统规范约束.由于问题的复杂性,优化方案限于集中方式,但提供了一个与分布式试探法相对应的有益的方法.
基于Web的分布式文档管理系统的设计与实现

企业和政府机构的分布式特征对文档管理提出了新的要求,传统的文档管理系统已经不能满足分布式应用需求.本文结合Web Services技术、工作流技术、版本控制技术和数据库技术,设计并实现了基于Web的分布式文档管理系统.本文工作已经在某政府机构的电子政务建设中得到了具体的实现与应用.
膜型Tim-3分子促进荷瘤小鼠抗肿瘤免疫应答的研究

目的 研究膜型Tim-3分子对H22肝癌细胞生长的抑制效应,探讨膜型Tim-3分子对荷瘤小鼠免疫系统的影响.方法 以H22肝癌细胞接种于BALB/c小鼠大腿肌肉建立小鼠实体瘤模型,采用原位注射裸DNA的方法在小鼠体内表达膜型Tim-3进行基因治疗,观察Tim-3对肿瘤生长的抑制作用;采用RTPCR技术在肿瘤生长不同时期检测Tim-3对4-1BB、IFN-γ、galectin-9等免疫相关基因表达的影响;流式细胞术检测膜型Tim-3对脾细胞增殖活性及细胞毒活性的影响;观察Tim-3 +4-1 BBL协同抗肿瘤作用.结果 体内转染表达Tim-3对肿瘤的生长有明显的抑制作用.流式细胞术结果显示,在小鼠荷瘤早期,Tim-3可提高脾细胞在特异性抗原刺激下的增殖反应和对H22肿瘤细胞的细胞毒作用;Tim-3与4-1BBL协同作用时抗肿瘤作用更加明显.结论 膜型Tim-3可在免疫启动阶段作为正向免疫调节因子增强抗肿瘤免疫应答,并可与4-1 BBL协同产生更强的抑瘤效应.
唯BH3域蛋白与细胞凋亡

唯BH3域蛋白是Bcl-2蛋白家族中的一类仅含有BH3同源区域的促凋亡分子.不同的凋亡刺激可以通过不同的途径活化不同的唯BH3域蛋白,且表现细胞类型特异性.唯BH3域蛋白通过与同一家族的其它抗凋亡或促凋亡蛋白相互作用,在启动线粒体通路中起重要作用.有些唯BH3域蛋白在内质网通路和死亡受体通路中也起到一定作用.对该类蛋白的研究将有助于深化对凋亡的认识,并为疾病治疗提供新的方法和思路.
CXC趋化因子与肿瘤血管新生

趋化因子在免疫调节、血管新生以及介导肿瘤的器官特异性转移中发挥重要作用.其中CXC趋化因子超家族由于N-端谷氨酸-亮氨酸-精氨酸基序(Glu-Leu-Arg,ELR motif)的有无使其在血管新生过程中具有了促进或者抑制血管新生的不同作用:含有ELR(ELR+)的CXC趋化因子经血管内皮组织上CXCR2介导血管新生促进作用;而不含有ELR(ELR-)的CXC趋化因子通过血管内皮组织上CXCR3介导血管新生抑制作用.
Evaluation model of the grey fuzzy on eco-environment vulnerability

The basic theory and evaluation index system of eco-environment vulnerability were reviewed. Based on the grey theory and fuzzy mathematics, a new comprehensive evaluation method from qualitative to quantitative, called grey-fuzzy evaluation, was proposed for evaluating eco-environment vulnerability. It was integrated of Association for Healthcare Philanthropy (AHP), grey correlation analysis, grey statistics and fuzzy judgment. The constitutional principle and method of the new evaluation method were given and its feasibility and effectiveness were proved by the practical example.
The severity and cause of leaf spot disease of Pongamia pinnata L. and fungicidal control of the pathogen

A survey on the symptom and severity of the leaf spot disease of Pongamia pinnata L. was conducted in the nurseries of the Institute of Forestry and Environmental Sciences, University of Chittagong (IFESCU), Bangladesh Forest Research Institute (BFRI) and Aronnak Nursery in Chittagong. The highest infection percentage and disease index were found in IFESCU nursery, followed by BFRI and the lowest was recorded in Aronnak nursery. The associated organism of leaf spot disease of P. pinnata was isolated from the diseased plant parts and the pathogenicity was established with the isolated fungus. Colletorichum gloeosprioides Penz was proved to be pathogenic. The inhibition of mycelial growth of C. gloeosporioides was observed and identified as suitable fungicides (Bavistin, Cupravite and Dithane M-45) and doses (0.05, 0.10, 0.50, 1.00, 1.50 and 2.00). The lowest and highest mycelial growth were respectively found on Bavistin and on Cupravite at the concentration of 0.05 after 8th day of incubation. It indicates that out of the three tested fungicides, Bavistin showed most effective, followed by Diathane M-45, and Cupravite was ineffective for its very little inhibition on mycelial growth.
Comparative evaluation of physical properties in soils of orange orchard and bushy forest in chittagong hill tracts, Banglandesh

The physical properties of soil on two hill slopes of 35% and 55% in orange orchard cultivated by the Mro tribe of Chittagong Hill Tracts (CHTs) were evaluated and compared with those of bushy hill forests. Soil samples were collected from three different depths (0-5 cm, 5-15 cm and 15-30 cm), digging three profiles in each land use for determining moisture content, organic matter content and particle density. Maximum water holding capacity, field capacity, dry and moist bulk density and porosity were determined only for the surface soils. Moisture content at all the soil depths was significantly higher (p≤ 0.05) in orange orchard than in forest on both the slopes. Orange orchard contained lower mean soil organic matter than forest on 55% slope, while it contained higher values on 35% slope compared to forest. The highest value of the above two properties was found at surface soil in both the land uses on both the slopes, decreasing with the increase of soil depth. On both the slopes maximum water holding capacity and porosity of surface soil and particle density at all soil depths were lower in orange orchard compared to those in forest. Field capacity values of surface soil did not show consistency in trend for the differences between the two land uses on both the slopes. Bulk density value of moist and dry surface soil was higher in orange orchard than in forest on both the hill slopes.
Effect of sensor quantity on measurement accuracy of log inner defects by using stress wave

Wood nondestructive testing (NDT) is one of the high efficient methods in utilizing wood. This paper explained the principle of log defect testing by using stress wave, and analyzed the effects of sensor quantity on defect testing results by using stress wave in terms of image fitting degree and error rate. The results showed that for logs with diameter ranging from 20 to 40 cm, at least 12 sensors were needed to meet the requirement which ensure a high testing accuracy of roughly 90% of fitness with 0.1 of error rate. And 10 sensors were recommended to judge the possible locations of defects and 6 sensors were sufficient to decide whether there were defects or not.
Effects of sludge on germination and initial growth performance of Leucaena leucocephala seedlings in the nursery

A study was carried out to determine the influence of different types of sludges (municipal, industrial and residential) on field germination, growth and nodulation of L. leucocephala seedlings in the nursery. Before sowing of seeds, different combinations of sludges were incorporated with the nutrient deficient natural forest soils. Field germination, nodulation status and physical growth parameters of seedlings (shoot and root length, vigor index, collar diameter, leaf number, fresh and dry weight of shoot and root and total dry biomass increment) were recorded after three and six months of seed sowing. Field germination, nodulation status and growth parameters were varied significantly in the soil amended with sludges in comparison to control. The highest number of nodule was recorded from soil amended with residential sludge (1:1) and highest fresh and dry nodule weight was also found from the same combination in both three and six month old seedlings. In case of growth parameters, the highest growth was recorded from soil and residential sludge (1:1) combination compared to control. From the study, it can be recommended that soil amended with residential sludge (1:1) provide better field germination, growth and nodule formation of L. leucocephala in degraded soil.
Analysis of compounds in dichloromethane extractives for Sawara Falsecypress (Chamaecyparis pisifera) outer heartwood

The chemical components of dichloromethane extractives for Sawara Falsecypress heartwood were analyzed with GC/MS except for basic chemical composition analysis for heartwood with Chinese standard method. 14 kinds of compounds were identified according to the computer compounds library data. The major compounds in dichloromethane extractives comprised of terpene and naphthalene derivatives. The experiments of antifungal effects of the dichloromethane extractive on Aspergillus niger were also carried out. The result showed that the dichloromethane extractive from Sawara Falsecypress has no or weak antifungal capability.
Photosynthesis responses to various soil moisture in leaves of Wisteria sinensis

A study was conducted to determine the fitting soil moisture for the normal growth of two-year-old W. sinensis (Sims) Sweets by using gas exchange technique. Remarkable threshold values of net photosynthetic rate (Pn), transpiration rate (Tr) and water use efficiency (WUE) were observed in the W. sinensis leaves treated by various soil moisture and photosynthetic available radiation (PAR). The fitting soil moisture for maintaining a high level of Pn and WUE was in range of 15.3%-26.5% of volumetric water content (VWC), of which the optimal VWC was 23.3%. Under the condition of fitting soil moisture, the light saturation point of leaves occurred at above 800μmol·m-2·s-1, whereas under the condition of water deficiency (VWC, 11.9% and 8.2%) or oversaturation (VWC, 26.5%), the light saturation point was below 400μmol·m-2·s-1. Moreover, the light response curves suggested that a special point of PAR occurred with the increase in PAR. This special point was considered as the turning point that indicated the functional transition from stomatal limitation to non-stomatal limitation. The turning point was about 600, 1000, 1000 and 400 μmol·m-2·s-1, respectively, at VWC of 28.4%, 15.3%, 11.9% and 8.2% . In conclusion, W. sinensis had higher adaptive ability to water stress by regulating itself physiological function.
A comparative study of the denoising methods of Thematic Mapper images for forest areas

The noises of remote sensing images, caused by imaging system and ground environment, negatively affect the accuracy and efficiency in extracting forest information from remote sensing images. The denoising is critical for image classifications for forest areas. The objective of this research is to assess the effectiveness of currently used spatial filtering methods for extracting with forest information related from Landsat 5 TM images. Five spatial filtering methods including low-pass filter, median filter, mean filter, sigma filter and enhanced self-adaptive filter were examined. A set of evaluation indices was designed to assess the ability of each denoising method for flatness, edge/boundary retention and enhancement. Based on the designed evaluation indices and visual assessment, it was found that sigma filter (D=1) and enhanced self-adaptive filter were the most effective denoising methods in classifying TM images for forest areas.
Web service based spatial forest information system using an open source software approach

For technical and other reasons there is a dilemma that data providers cannot find an appropriate way to redistribute spatial forest data and data users who need spatial data cannot access and integrate available forest resources information. To overcome this dilemma, this paper proposed a spatial forest information system based on Web service using an open source software approach. With Web service based architecture, the system can enable interoperability, integrate Web services from other application servers, reuse codes, and shorten the development time and cost. At the same time, it is possible to extend the local system to a regional or national spatial forest information system. The growth of Open Source Software (OSS) provides an alternative choice to proprietary software for operating systems, web servers, Web-based GIS applications and database management systems. Using open source software to develop spatial forest information systems can greatly reduce the cost while providing high performance and sharing spatial forest information. We chose open source software to build a prototype system for Xixia County, Henan Province, China. By integrating OSS packages Deegree and UMN MapServer which are compliant to the OGC open specifications, the prototype system enables users to access spatial forest information and travelling information of Xixia County which come from two different data servers via a standard Web browser and promotes spatial forest information sharing.
Separation and purification of Arabinogalactan obtained from Larix gmelinii by macroporous resin adsorption

Arabinogalactan (AG) obtained from Larix gmelinii R. was purified with the method of macroporous resin adsorption. Effects of various parameters on the adsorption, including adsorption time and temperature, the concentration and the dosage of raw AG, the reused numbers of resin, were investigated. The effect of purification was tested through the removal rate of impurity and the contents of AG and impurity. The optimal condition was determined as follows: adsorbed at 30℃ for 2 h with the concentration of raw AG ＜0.1 g·mL~(-1) and its dosage ＜ 7 mL, the dose of resin was 3 g and reused for 4 times. On the basis of these, macroporous resin column was used for AG purification. The result showed that the AG yield could reach 68.28% with sugar content of 95.02%. The analysis of IR and UV showed that the effect of macroporous resin characteristics on the purification of AG was significant. The obtained product had the same functional groups with standard sample.
大型稀疏线性方程组新的ICCG方法

有限元线性方程组的系数矩阵一般具有稀疏性和对称性的特点,全稀疏存贮方法就是利用这些特点,只存贮对称部分的非零元素,采用链表式管理,即节省存贮空间,又便于动态更改.在完全Choksky分解的基础上,构造出了新的预处理方法,应用适当的对角元修正策略,得到了一种新的ICCG方法,能够确保方程组高效准确的分解和求解.数值算例证明该算法在时间和存贮上都较为占优,可靠高效,能够应用于有限元线性方程组的求解.
Checklist of Eumolpidae (Coleoptera, Chrysomeloidea) from Mao'ershan region including one new record species from China

Thirty-six species and 1 subspecies belonging to 12 genera, 3 subfamilies of the family Eumolpidae collected from Mao'ershan region (Heilongjiang Province) of China are listed in this paper, including one new record species, Cryptocephalus yamadai Ch(u)j(o), 1940,from China. Description and photos of the new record species are also provided.
基于区域排除法和方格移动法的矩阵伪谱计算

常用的格子SVD法在精确计算矩阵A的ε-伪谱A_ε(A)时,需要将感兴趣的区域作细网格划分,在每一个网格点处计算бmin(zI-A),并根据该值的大小判断该网格点是否位于A_ε(A)伪谱曲线上,其计算量往往很大.本文提出两种新的用于计算伪谱的方法:区域排除法和方格移动法.它们以不同方式,减小计算区域,大大提高了伪谱的计算速度.数值实验也充分说明算法的有效性.
Comparative analysis of some selected macronutrients of soil in orange orchard and degraded forests in Chittagong Hill Tracts, Bangladesh

Status of organic carbon (C), total nitrogen (N), available potassium (K), calcium (Ca) and phosphorus (P) in three different depths (0-5 cm, 5-15 cm and 15-30 cm) on two hill slopes of 35% and 55% in orange orchard cultivated by the Mro tribe of Chittagong Hill. Tracts (CHTs) were evaluated and compared with those in degraded bush forests, through digging three profiles in each land use. The content of all the five nutrients was found to be higher in the soil of orange orchard than in the soil of forest. But the variation was not consistent for both the slopes. The content varied depth wise also, having the highest value in surface soil in case of both the land uses on both the slopes. A mean available K content was significantly higher in orange orchard than in forest on 55% slope, while it was lower on 35% slope. Surface soil contained the nutrients of K and Ca with the amount of 0.2905-mg·g~(-1) soil and 3.025-mg·g-1soil respectively in the orchard, while 0.1934-mg·g~(-1) soil and 1.6083-mg·g~(-1) soil were respectively in the forest. Organic carbon and total nitrogen were found more or less similar in surface soil on both the land uses showing a slight difference. Available P was found only in orange orchard, and in forest it was too little in amount to detect by the spectrophotometer. The degraded forests were poor in nutrient content due to high rate of soil erosion, which would be possible to be improved by bringing it under tree cover as proved by the adaptation of orange orchard there.