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Search Results: 1 - 10 of 53939 matches for " 樊斌琦 "
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虫害诱导杨树对杨扇舟蛾寄主选择和生长发育的影响
钱为,,郝德君*,王焱,马凤林
南京林业大学学报(自然科学版) , 2010, DOI: 10.3969/j.jssn.1000-2006.2010.04.037
Abstract: 在室内采用选择性和生物测定方法,研究了昆虫取食危害过的杨树对杨扇舟蛾寄主选择行为和生长发育的影响。结果表明:杨扇舟蛾幼虫对虫害处理的叶片表现为忌避行为;取食虫害处理的叶片,使得幼虫的发育历期延长,死亡率增加,对食物的利用和转化效率下降;蛹质量减小;成虫的羽化率降低,产卵量减少。因此,昆虫取食危害能够诱导杨树对杨扇舟蛾产生抗虫性。
刘氏短须螨危害对水杉生理生化物质及挥发物的影响
,苏鹏,郝德君*,王焱,张岳峰
南京林业大学学报(自然科学版) , 2012, DOI: 10.3969/j.jssn.1000-2006.2012.03.007
Abstract: 利用植物生理和生化方法测定了水杉被刘氏短须螨危害前后针叶内叶绿素、可溶性糖、游离氨基酸、黄酮、单宁、挥发物和保护酶活性的变化。结果表明:水杉叶片被刘氏短须螨危害后,叶绿素含量降低18.5%,可溶性糖含量降低12.8%,游离氨基酸含量降低12.2%,黄酮含量升高26.6%,单宁含量升高25.8%,过氧化物酶和超氧化物歧化酶活性分别升高65%和139%。刘氏短须螨侵染后,水杉叶片挥发物组分变化不大,但各组分构成比例发生较明显变化。挥发物主要成分由萜类、萜类氧化物、酯类、烃类、杂环类及少量的其他物质组成,健康叶片共检测到35种物质,被害叶片检测到33种,两者共有物质28种。研究结果说明,刘氏短须螨的刺吸危害引起了寄主植物明显的生理生化变化。
香樟齿喙象成虫触角感器的微观特征分析
顾天滋,张丛丛,,,,,,郝德君
南京林业大学学报(自然科学版) , 2017, DOI: 10.3969/j.issn.1000-2006.201606018
Abstract: 【目的】香樟齿喙象(Pagiophloeus tsushimanus Morimoto)是新发现的危害香樟(Cinnamomum camphora)的钻蛀性害虫,研究触角感器超微形态有助于了解该害虫的嗅觉行为及其与寄主植物的相互关系。【方法】将成虫触角用超声波清洗并冷冻干燥,采用离子溅射仪喷金镀膜,再利用扫描电镜观察其外部形态、感器类型及分布状况。【结果】香樟齿喙象雌、雄成虫触角均呈膝状,共有7类11种感器类型,分别为3种刺形感器、2种毛形感器、2种锥形感器以及表皮孔、柱形感器、栓锥形感器和叉形感器。刺形感器是香樟齿喙象的主要感器类型,在性别之间除刺形感器Ⅰ型、Ⅱ型长度存在显著差异(P<0.05)外,其他类型感器长度、数量及分布均没有显著差异(P>0.05); 锥形感器和叉形感器仅在雌虫触角上发现。【结论】此次研究观察了香樟齿喙象成虫的触角感器类型,可为开发基于信息素的害虫防治方法提供理论依据。
【Objective】Pagiophloeus tsushimanus Morimoto is a wood-boring beetle that has recently been introduced to China causing serious damage to Cinnamomum camphora in Shanghai City and Fujian Province. Investigating the ultrastructure of the pests' antennal sensilla could elucidate its olfactory behaviors and interactions with its host.【Method】The antennae were submerged in an ultrasonic bath, freeze-dried and sputter-coated with gold. Then, the antennae morphology, the type, number and distribution of antennal sensilla were visualized by using scanning electron microscopy.【Result】The adult antennae were geniculate, seven types including 11 subtypes of sensilla were recorded: sensilla chaetica(Sch Ⅰ-Ⅲ), trichoid sensilla(St Ⅰ-Ⅱ), sensilla basiconica(Sb Ⅰ-Ⅱ), cuticular pore, cylindric sensilla, styloconica sensilla and sensilla furcatea. Sensilla chaetica represent the most abundant type of sensillum, and there were no significant sex-specific differences in length, number, or distribution of the antennal sensilla, except for the lengths of Sch Ⅰ and Sch Ⅱ. However, sensilla basiconica and sensilla furcatea were only found in females.【Conclusion】Studying on the ultrastructure of antennal sensilla of female and male P. tsushimanus provides a theoretical foundation for the development of pheromone-based P. tsushimanus control
试析会计准则的国际协调

财会月刊 , 2008,
Abstract: 本文对美国会计准则的国际协调历程进行了分析,以此作为我国会计准则国际协调的借鉴对象,并提出在我国会计准则体系基本建设完成的情况下,我国应遵循的国际协调原则以及应对措施。【关键词】会计准则国际会计准则国际协调一、美国会计准则的国际协调概述  美国是典型的自由市场经济体制国家。在美国,私有制企业数量占据绝对优势,而国有企业数量极少,国有企业创造的国民收入在国民收入总额中所占比重不到2%;资源配置主要依靠市场,政府作用微弱;股份有限公司在经济中处于基础性地位,证券市场发达,证券筹资的比重较大;政府对国民经济干预的程度很低。美国的法律环境也比较特殊,与其他主要西方国家不同。美国政府不是依据公司法来管理公司,而是依据证券法和证券交易法设立证券交易委员会对公司进行管理。美国政府对会计准则没有强制性的法律要求,对公司定期财务报告的编报也没有总的立法,国家法律没有规定公司应向国家有关部门报送财务报表,各州的立法对公司会计业务处理规范一般也无强制性的要求。而美国的税务制度对公司的财务报告也只是提出一般性的要求。它要求每个应纳税的公司须持有必要的账簿和记录,以便于填写纳税申报单时确定公司总收入额及税收减免的金额。在这种经济体制和法律环境下,政府不可能成为会计信息的主要使用者,会计准则的制定尽量交给民间会计职业团体,以减少政府的干预;会计准则的主要目标是满足投资者和债权人进行经济决策的需要,尤其注重保护证券投资者的利益。
开放楔形胫骨高位截骨术治疗膝关节内侧间室骨关节炎疗效观察
Effectiveness of open wedge high tibial osteotomy on medial unicompartmental knee osteoarthritis

张子,梁佳林,立宏,时志,党晓谦,王坤正
- , 2018, DOI: 10.7507/1002-1892.201802015
Abstract: 目的 探讨开放楔形胫骨高位截骨术(open wedge high tibial osteotomy,OWHTO)治疗膝关节内侧间室骨关节炎的效果。 方法 回顾分析 2015 年 1 月—2017 年 1 月采用 OWHTO 治疗的 61 例膝关节内侧间室骨关节炎患者临床资料。男 14 例,女 47 例;年龄 44~60 岁,平均 52.8 岁。体质量指数为 19.1~34.7 kg/m 2,平均 25.3 kg/m 2。左膝 27 例、右膝 34 例。病程 1~9 年,平均 5.3 年。骨关节炎分期:Ⅱ期 33 例,Ⅲ期 28 例。术前膝关节美国特种外科医院(HSS)评分为(56.0±3.7)分,行走时膝关节疼痛视觉模拟评分(VAS)为(4.6±1.0)分。 结果 手术时间为 49~85 min,平均 66.5 min;切口长度为 10~13 cm,平均 11.0 cm;总显性失血量为 80~210 mL,平均 139.1 mL;术后卧床时间为 1~10 d,平均 4.7 d。患者均获随访,随访时间 12~24 个月,平均 17.3 个月。术后 3 个月 X 线片测量示胫骨平台负重区为 60.3%~66.8%,平均 63.4%。术后 3、6 个月,膝关节 HSS 评分分别为(79.1±4.2)、(85.3±3.1)分,VAS 评分分别为(1.7±0.7)、(0.6±0.5)分,差异均有统计学意义( P<0.05)。 结论 OWHTO 治疗膝关节内侧间室骨关节炎疗效确切,力线纠正理想,并发症较少,但应注意术前需要精确测量术中张开角。
Objective To evaluate the effectiveness of open wedge high tibial osteotomy (OWHTO) in treatment of medial unicompartmental knee osteoarthritis (MUKOA). Methods A clinical data of 61 cases with MUKOA who were treated with OWHTO between January 2015 and January 2017 were retrospectively analyzed. There are 14 males and 47 females with an average age of 52.8 years (mean, 44-60 years). The body mass index ranged from 19.1 to 34.7 kg/m 2 (mean, 25.3 kg/m 2). Twenty-seven cases were left side and 34 cases were right side. The disease duration was 1-9 years (mean, 5.3 years). The MUKOA was rated as stage Ⅱ in 33 cases and stage Ⅲ in 28 cases. Preoperative Hospital for Special Surgery (HSS) score was 56.0±3.7. Walking visual analogue scale (VAS) score was 4.6±1.0. Results The operation time was 49-85 minutes (mean, 66.5 minutes). The length of incision was 10-13 cm (mean, 11.0 cm). The total overt blood loss was 80-210 mL (mean, 139.1 mL). The postoperative bed-rest time was 1-10 days (mean, 4.7 days). All patients were followed up 12-24 months (mean, 17.3 months). The bearing area of tibial platform at 3 months after operation was 60.3%-66.8%, with an average of 63.4%. At 3 and 6 months after operation, the HSS score was 79.1±4.2 and 85.3±3.1 respectively, and the VAS score was 1.7±0.7 and 0.6±0.5 respectively, all showing significant differences ( P<0.05). Conclusion OWHTO is an ideal choice for treating MUKOA with less postoperative complications. The force line could be corrected by OWHTO. However, the preoperative preparations are very important, especially that the open angle should be measured accurately.
具有多粒度不确定语言评价信息的多属性群决策方法
,治平
控制与决策 , 2010,
Abstract: 针对具有多粒度不确定语言评价信息的多属性群决策问题,提出了一种决策分析方法.首先给出了不确定语言短语两两比较的优势度描述及其性质分析;然后根据优势度、属性权重向量及专家权重向量,通过运用简单加权法,建立两两方案比较的群体综合优势度矩阵,基于群体综合优势度矩阵,给出了一种基于优于次数的方案排序方法;最后,通过一个算例说明了该方法的可行性和有效性.
空调外机致楼盖振动实测与减振分析
Floor Vibration Measurement Induced by Outside Air Condition Machines and Vibration Reduction Analysis
 [PDF]

冰若, 宗刚,
Hans Journal of Civil Engineering (HJCE) , 2015, DOI: 10.12677/HJCE.2015.45027
Abstract: 本文以某一工程振动实测为背景,研究了大型中央空调系统引发的振动对建筑振动的影响,在进行振动现场实测及对实测信号时、频域和振动加速度级进行分析的基础上,采用有限元模型对不同结果减振方案对应的振动工况进行了数值模拟,提出了优化的结构减振方案,分析结果表明,框架柱截面尺寸和楼板厚度对振动水平的影响较大,建议顶层楼盖楼板厚度增为200 mm,此时的楼板振动响应水平减小至73.2 dB,满足现行规范要求。
Based on an engineering vibration measurement, vibration influence research induced by outside air condition machines was done in this paper. Firstly, vibration measurement was carried out, and time domain, frequency domain as well as vibration acceleration level were analyzed. Secondly, the finite element model was used to analyze different working conditions and a comparison was made with the results from measurement. Finally, the preferred consolidation and vibration reduction scheme was given. The analysis results showed that the section of column and the thickness of floor slab are important structure parameters for vibration reduction. It is suggested that the slab thickness of top floor should be increased to 200 mm and then the vibration level will be decreased to 73.2 dB, satisfying the current specification requirements.
热带气旋灾情的预测及评估
,梁必骐
地理学报 , 2000, DOI: 10.11821/xb2000S1009
Abstract: 针对1990~1996年登陆广东省的21个热带气旋所造成的灾情,采用模糊数学原理和方法,选取不同的因子组合,计算出登陆热带气旋的综合灾情指数,并在此基础上客观地划分5个灾情等级,用来表示受灾的程度。结果表明,灾前预测及灾害评估模型都具有较高的拟合率,能较好地评价和预测登陆热带气旋可能造成的经济损失程度。
战略性R&D补贴、自主创新与我国汽车产业结构优化研究
韩民春,
科技进步与对策 , 2010,
Abstract: 以加入WTO后中国汽车产业为研究对象,通过自主创新评价指数、皮尔逊相关系数对战略性贸易政策中R&D补贴政策、自主创新以及我国汽车产业结构之间进行经验性、相关性及回归分析。研究发现R&D补贴政策与我国汽车产业自主创新高度正相关,相关系数十分显著;战略R&D补贴及企业自主创新对市场占有率影响存在滞后效应,并对汽车的市场垄断集中度有分化作用,优化了汽车产业结构。我国政府应当加大对战略性产业的R&D补贴,进一步优化政府R&D补贴结构,完善创新激励制度,培育良好的创新环境。战略性贸易政策R&D补贴自主创新汽车产业
企业战略联盟自组织演化的协同动力模型构建
,
科技进步与对策 , 2010,
Abstract: 阐述企业战略联盟自组织演化的协同动力机理,基于组织资本剖析,形成企业战略联盟自组织演化的战略、结构和文化动力要素,并确立联盟熵为战略熵、结构熵和文化熵,在此基础上构建企业战略联盟自组织演化的协同动力模型。战略联盟自组织演化组织资本联盟熵协同机制
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