Research on the investment value of The Huayi Brothers Company

2006年以来，中国文化产业快速发展，产业经济增加值年复合增长率远超同期GDP的增长率。在中国文化产业大发展的背景下，一大批文化企业也迅速成长起来，进入高成长、高收益的发展阶段。华谊兄弟公司是文化产业中的优秀企业之一，是主要从事影视内容创作与生产的文化娱乐龙头企业。本文以华谊兄弟公司为研究对象，对其进行投资价值研究。期望一方面通过对其较为全面的分析研究，帮助读者清晰地认识其价值；另一方面通过其研究能够同时展现出其所在的相关文化行业的市场空间和发展趋势。 本文按照自上而下、宏观至微观的逻辑顺序展开。 首先，对与公司行业相关的宏观环境影响因素进行分析，包括政治、经济、社会、技术等四个方面，判断...Since 2006 year, the Chinese cultural industry has being develop quickly, its economic value added growth rate is higher than GDP’s growth rate. A large number of cultural enterprises have been growing up quickly, into the development stage of high growth, high income. Huayi Brothers Company is one of the outstanding enterprises, is an engaged in movie content creation and production of cultural ...学位：工商管理硕士院系专业：管理学院_工商管理硕士(工商管理硕士)学号：1792011115097

高温空气的热力学性质

自从第二次世界大战末德国发明V-2火箭,特别是1957年苏联发射第一个人造地球卫星以后,航空和宇航技术高速发展,现在,飞行体的速度已远远超过第一宇宙速度(7.8公里/秒)。随着速度剧增,带来了低速飞行时不曾出现的特殊问题:一是高M数效应,一是高温对飞行介质的影响。高M数效应使得通常的Navier-Stokes方程失效。研究这方面问题,属于高速空气动力学范围。在实际问题中,高速必然伴随着产生高温,这两方面的效应交织在一起。热效应比起单纯的速度效应更本质,这使得高速高温流动现象及其介质性质的研究成为高温气体物理力学的一个最重要方面

Effects of Salt Stress on Photosynthetic Characters in Honeysuckle with Different Ploidies

【目的】研究四倍体和二倍体金银花叶片光合作用对盐胁迫的响应,特别是盐胁迫对PSⅠ和PSⅡ性能以及协调性的影响,比较盐胁迫下叶片光合特性的差异,分析盐胁迫对叶片Na+、Cl-和丙二醛含量以及叶片生物量的影响,揭示不同倍性金银花耐盐胁迫的能力,为盐碱地栽培品种的选择提供参考。【方法】选用四倍体和二倍体金银花为试验材料,采用叶绿素荧光快速诱导动力学曲线和820 nm光反射曲线同步测定技术,结合气体交换参数,研究中度(150 mmol&middot;L-1 Na Cl)和重度(300 mmol&middot;L-1 Na Cl)盐胁迫对四倍体和二倍体金银花叶片光合作用和光合机构的影响。金银花植株定植于装有石英砂的塑料盆中,Hoa...;【Objective】In order to provide a reference for cultivar selection of saline land, leaf photosynthetic responses to salt stress in diploid and tetraploid honeysuckle, especially the effects of salt stress on PS and PS performance and coordination wer Ⅰ Ⅱ e studied, the difference in leaf photosynthetic characters under salt stress was compared and the effects of salt stress on leaf Na+ , Cland malondialdehyde contents and the leaf biomass were analyzed so that revealed salt tolerance of the honeysuckle with different ploidies.【Method】Tetraploid and diploid honeysuckle plants were used as experimental materials to study the effects of moderate (150 mmol&middot;L-1 NaCl) and severe (300 mmol&middot;L-1 NaCl) salt stress on photosynthesis and photosynthetic apparatus by simultaneously analyzing chlorophyll a fluorescence transient and light reflection at 820 nm as well as gas exchange parameters. Honeysuckle plants were planted in plastic pots filled with quartz sand and cultured with Hoagland nutrient solution. NaCl was added to nutrient solution incrementally by 50 mmol&middot;L-1 step per day to provide final concentrations of 150 and 300 mmol&middot;L-1 for salt treatment, and the treatment lasted for 15 days. The control plants were cultured with nutrient solution without adding NaCl. During salt treatment, expanded leaves from the middle of a shoot were sampled for measuring parameters.【Result】Under moderate salt stress, leaf photosynthetic rate, stomatal conductance and intercellular CO2 concentration were significantly decreased in diploid and tetraploid honeysuckle, and the decrease was lower in the tetraploid, indicating less stomatal inhibition on photosynthesis. Under severe salt stress, leaf photosynthetic rate was also significantly decreased in diploid and tetraploid honeysuckle, and the tetraploid could maintain higher photosynthetic activity than the diploid due to the lower decrease in leaf photosynthetic rate. After 7 days of severe salt stress, leaf carboxylation rate and Rubisco activation state were significantly decreased in diploid honeysuckle. PS photoinhibition was induced, resulting in the decline of quantum Ⅱ yield of electron transport to PS . Therefore, PS reduction Ⅰ Ⅰ was inhibited, and the increased PSⅠoxidation should be observed in the 820 nm reflection transient. On the contrary, PS oxidation was significantly decreased. Unde Ⅰ Ⅰ r severe salt stress, PS photoinhibition also occurred in the leaves of diploid honeysuckle, which could not effectively drive electrons to its acceptor side and then inhibited PS oxidation. The sign Ⅰ ificant decrease of PS oxidation resulted from the greater photoinhibition in PS than PS , and the coordination between PS and Ⅰ ⅠⅡ Ⅱ PS was destroyed. After 15 days of severe Ⅰ salt stress, leaf carboxylation rate and activation state of Rubisco enzyme were significantly decreased in tetraploid honeysuckle, and the decrease was lower than that in diploid honeysuckle. The capacity of PS and PS was not significantly affected, and Ⅱ Ⅰ their coordination was maintained in tetraploid honeysuckle under severe salt stress. Thus, tetraploid honeysuckle also had higher leaf photosynthetic activity than the diploid upon severe salt stress. After salt stress for 15 days, leaf Na+ , Cl- and malondialdehyde contents were significantly increased in diploid honeysuckle, whereas leaf dry weight per plant was significantly reduced, and the change amplitude was greater than that in tetraploid honeysuckle, indicating lower leaf ionic toxicity in the tetraploid, which might be responsible for maintaining higher photosynthetic capacity under salt stress.【Conclusion】 Under salt stress, tetraploid honeysuckle possesses higher leaf photosynthetic activity in terms of greater leaf stomatal conductance, higher Rubisco activation state and normal PSⅡ and PS coordination, and then c Ⅰ ould accumulate greater biomass. Therefore, tetraploid honeysuckle has stronger salt tolerance and is more suitable for cultivation in saline land.</p

Comparison of fertilizer-effect models on winter wheat response to nitrogen and phosphorus fertilizers in saline soils in the Yellow River Delta

通过大田试验, 研究了黄河三角洲盐碱土地区冬小麦合适的肥料效应模型。在冬小麦生长季设置4种不同的氮磷肥用量, 根据&ldquo;3414&rdquo;试验设计8 种不同的肥效试验处理, 以探讨线性加平台、一元二次、平方根和二元二次4 种不同模型的拟合效果。结果显示, 4 种肥料效应模型的拟合结果经检验都达到极显著水平 (P&lt;0.01)。在一元肥料效应模型中, 氮磷一元二次模型拟合效果最好, 最高收益分别为7 448.3 元&middot;hm-2 和7 357.7 元&middot;hm-2, 最佳经济氮磷用量分别为254.4 kg&middot;hm-2 和98.6 kg&middot;hm-2。对比一元与二元模型, 后者拟合效果较好, 最佳经济氮磷用量分别为244.1 kg&middot;hm-2 和94.2 kg&middot;hm-2, 即氮磷肥配比为2.6∶1, 经济效益为7 432.4 元&middot;hm-2, 氮肥农学利用率为6.2 kg(籽粒)&middot;kg-1(N), 磷肥农学利用率为13.8 kg(籽粒)&middot;kg-1(P2O5)。结合拟合度、最佳经济施肥量、经济收益、肥料农学利用率和一元模型的局限性分析得出, 二元二次肥料效应模型最优, 可作为黄河三角洲地区盐碱土冬小麦氮磷肥效模型的最佳选择。</p

一种模拟植物水涝胁迫的实验装置

本实用新型属于植物实验技术领域，具体地说是一种模拟植物水涝胁迫的实验装置。包括车体、水箱、进水管、排水系统及植物固定装置，其中水箱设置于车体上、并上端设有植物固定装置，所述水箱内设有多个区域，各区域上均设有一端外露于水箱上方，另一端连通到水箱底部的进水管，所述水箱内的各区域的底部均设有与排水系统连接的排水口。所述箱体的外侧沿竖直方向设有水位刻度线。所述水箱的上方设有与车体可拆卸连接的人工光源。本实用新型操控简便、移动方便、功能丰富、设计独特，实现了不同程度涝害胁迫处理的整合，在室内和野外都可使用，能够解决现有装置操控性差、造价高、功能单一等问题

Effects of root abscisic acid on Na~+ transport and photosystem Ⅱ in Helianthus tuberosus under salt stress

The effects of root abscisic acid(ABA)signal on Na~+ transport and photosystem Ⅱ(PSⅡ)in Jerusalem artichoke(Helianthus tuberosus)under salt stress(150 mmol&middot;L~(-1)NaCl)were examined by applying ABA synthesis inhibitor sodium tungstate to roots. Sodium tungstate inhibited ABA synthesis in roots,reduced root Na~+ efflux,and increased the efficiency of Na~+ transport from roots to leaves under salt stress. Salt stress increased leaf Na~+ content and did not affect leaf membrane lipid peroxidation,PSⅡ reaction center protein and PSⅡ maximum photochemical efficiency(Fv /Fm). The inhibition on root ABA synthesis significantly increased leaf Na~+ accumulation, aggravated leaf membrane lipid peroxidation,impaired PS Ⅱ reaction center protein, decreased Fv /Fm,and induced PSⅡ photoinhibition. In conclusion,root ABA signal was beneficial to reducing leaf Na~+ accumulation and preventing PSⅡ oxidative damage by inducing root Na~+ efflux and inhibiting Na~+ transport to the aerial part in H. tuberosus under salt stress.</p