Allocation of power generating and shipping of Hanjiang upstream cascade

1Generalsituationofthecascades1.1Cascadeshydropowerplants HanjiangRiverisoneofthelongesttributariesof YangtseRiver,originatingfromNingqiangcountyof ShaanxiprovinceandflowingthroughShaanxi provinceandHubeiprovince.HanjiangRiveris1567kmlongintotal,and709kmofitinShaanXi provincerunsthroughHanzhongandAnkangregions fromtheeasttothewest.TheupperreachesofHanjiangfromYangxian countytoBaihecountyinShaanxiprovinceis443km long,anditstotalheadfallsisabout280mhigh.Withabundantwaterpowerresources,its…     

A new research on auto compatible default theory

Ｅｘｔｅｎｓｉｏｎｉｓｔｈｅｍｏｓｔｉｍｐｏｒｔａｎｔｃｏｎｃｅｐｔｉｎｄｅｆａｕｌｔｌｏｇｉｃ．Ｒｅｉｔｅｒｈａｄｍａｄｅｓｏｍｅｒｅｓｅａｒｃｈｏｎｔｈｅｓｐｅｃｉａｌｋｉｎｄｏｆｄｅｆａｕｌｔｌｏｇｉｃ,ｔｈａｔｉｓｎｏｒｍａｌｄｅｆａｕｌｔｌ...     

Systematic studies on the neotropical genus Fusaea (Baill.) Saff.(Annonaceae)

ＴｈｅｇｅｎｕｓＦｕｓａｅａｗａｓｆｏｕｎｄｅｄｂｙＳａｆｏｒｄ［１］ｉｎ１９１４．ＴｈｅｔｙｐｅｓｐｅｃｉｅｓＦ．ｌｏｎｇｉｆｏｌｉａｗａｓｏｒｉｇｉｎａｌｙｄｅｓｃｒｉｂｅｄｂｙＡｕｂｌｅｔ［２］ａｓＡｎｎｏｎａｌｏｎｇｉｆｏｌｉａ．Ｂａｉｌｏ...     

黄土高原半干旱区农田土壤水分动态及其调控——以甘肃为例

由甘肃黄土高原的榆中站、定西站和西峰站的实测（１９８９～１９９２年）农田土壤湿度的对比分析得出，黄土高原半干旱区农田土壤水分的变化规律是：在一年内有春季严重失墒期，夏秋增墒期，秋冬缓慢失墒期和冬季稳墒期等４个时期；在０～２００ｃｍ的土壤剖面内，按其供水性能可分为速变层、活跃层和相对稳定层．并提出了集水蓄墒的具体调控措施     

榆中县灌溉型水土资源利用系统模型的调控与优化

从系统的观点出发，给出了榆中县灌溉型水土资源利用系统的模型结构，通过水土平衡机制的调控，制定了相应的灌溉定额和灌溉制度，最后采用线性规划方法对系统进行了优化，并提出了具体可行的节水改土对策和相应的措施。     

区域农业可持续发展评价指标体系及综合评价模型研究

构建了区域农业可持续发展水平评价指标体系和能力评价指标体系 ,并在建立了多指标综合评价模型的基础上以梅州市为例进行了评价分析 ,最后对指标体系和评价模型的理论与实际应用价值进行了讨论     

QUALITATIVE ANALYSIS FOR A THIRD-ORDER DIFFERENTIAL EQUATION IN A MODEL OF CHEMICAL SYSTEMS

In this paper a mathematical model of chemical systems is investigated.We present the conditions for the existence and local stability of the steady statesand the periodic solution of the Hopf type.Specifically,we show by using an ana-lytical method that there may exist two or four Hopf bifurcation points separatedat a finite distance from each other;at the same time,a technique for studying theHopf bifurcation value is given.     

Rapid solidification of acoustically levitated Al-Cu-Si eutectic alloy under laser irradiation

Al-27%Cu-5.3%Si ternary eutectic alloy was melted using a YAG laser and then solidified while being acoustically levitated. A maximum undercooling to 195 K (0.24 TL) was achieved with a cooling rate of 76 K/s. The solidification microstructure was composed of (Al+θ+Si) ternary eutectics and (Al+θ) pseudobinary eutectics. During acoustic levitation, the (Al+θ+Si) ternary eutectics are refined and the (Al+θ) pseudobinary eutectics have morphological diversity. On the surface of the alloys, surface oscillations and acoustic streaming promote the nucleation of the three eutectic phases and expedite the cooling process. This results in the refinement of the ternary eutectic microstructure. During experiments, the reflector decreases with increasing alloy temperature, and the levitation distance always exceeds the resonant distance. Because of the acoustic radiation pressure, the melted alloy was flattened, and deformation increases with increasing sound pressure. The maximum aspect ratio achieved was 6.64, corresponding to a sound pressure of 1.8×104 Pa.     

DNA damage stress induces the dissociation of Smurf1/2 from MDM2 in a slow manner

The tumor suppressor p53 locates at the key point of cell growth or apoptosis balance, and the expression level of p53 is tightly controlled by ubiquitin ligases including MDM2. Upon DNA damage stresses, p53 was accumulated and activated, leading to cell cycle arrest or apoptosis. We previously showed that Smad ubiquitylation regulatory factor 1/2 (Smurf1/2) promotes p53 degradation by interacting with and stabilizing MDM2, and consequently enhancing MDM2-mediated ubiquitylation of p53. However, it is uncle...     

Gastric vagal afferent inputs reach the glycemia-sensitive neurons of lateral hypothalamic area in the rat

The lateral hypothalamic area (LHA) is one of the most important central areas in the regulation of feeding behavior[1]. The glycemia-sensitive neurons within the LHA sense the blood glucose level and subsequently trig-ger various visceral and somatic responses for maintaining the homeostasis of blood glucose concentration. Some electrophysiological studies have demonstrated that the gastric vagal afferent inputs could reach the LHA in the cat[2,3], but the studies did not reveal whether th…