再分

"When the record is played back, another stylus responds to the undulations, and its motions are then reconverted into sound."

放声时另一针与纹道接触，当唱盘旋转时，会再变成声音。静力学计算是用来决定照射方向与观察方向之间的角分线方向的运动。

By analyzing the cultivated land data from different sources in different phases after 1949,the paper considers the statistics with more errors happens during 1960-1985.According to the systematic data on land use gathered in the 1996 survey,based on reverse deduction of the cultivated land area from 1986 to 1996,and deduction of the cultivated land area from 1960 to 1985 by stages by employing yield of grain,this paper redescribed the actual changing trend and character of Chinese cultivated land and analyzed the driving force of the policy relative to cultivated land to cultivated land area change.

针对该问题，论文对1949～2003年不同时期不同来源的耕地数据系列进行分析，认为统计数据存在问题较多的时期为1960～1985年，并采用粮食产量对耕地面积进行了分时期的反演，对于1986～1996年间的耕地数量则按照全国土地利用详查统一到1996年的结果再进行反推，由此重新刻画建国以来中国耕地资源数量变化的趋势和特征，并结合不同时段耕地相关政策对耕地数量变化的驱动作用进行分析。

By analyzing the cultivated land data from different sources in different phases after 1949,the paper considers the statistics with more errors happens during 1960-1985.According to the systematic data on land use gathered in the 1996 survey,based on reverse deduction of the cultivated land area from 1986 to 1996,and deduction of the cultivated land area from 1960 to 1985 by stages by employing yield of grain,this paper redescribed the actual changing trend and character of Chinese cultivated land and analyzed the driving force of the policy relative to cultivated land to cultivated land area change.

针对该难题，论文对1949～2003年不同时期不同来源的耕地数据系列进行分析，认为统计数据存在问题较多的时期为1960～1985年，并采用粮食产量对耕地面积进行le分时期的反演，对于1986～1996年间的耕地数量则按照全国土地利用详查统一到1996年的结果再进行反推，由此重新刻画建国以来中国耕地资源数量变化的趋势和特征，并结合不同时段耕地相关政策对耕地数量变化的驱动作用进行分析。

Groups the population according to the search width and integrated partition region principle, and determines task allocation on the basis of balanced task. Further regarding the center of the square grid as the point of the graph, transforms the original problem to be an approximate Hamilton question, then obtain one path like "one stroke" starting from the jumping-off point and rendezvousing for the midpoint of left side.

根据搜索宽度和整分搜索区域原则进行人数分组，再根据区域分配的均衡原则确定任务分配，最后把每个方格中心看作图中的点，将搜索问题转化为一个近似的哈密尔顿问题，设计出一条从起点处出发集结于一边中点的&一笔画&路径，而该路径的搜索效率达到95%，即得到的是误差很小的近似最优解。

Here, using a strategy of re-expressing key developmental regulators in vivo, we identify a specific combination of three transcription factors Ngn3 (also known as Neurog3 Pdx1 and Mafa that reprograms differentiated pancreatic exocrine cells in adult mice into cells that closely resemble beta-cells.

这里，在体内通过一种策略将生长发育中关键的调控因子进行再表达，我们鉴定出了一系列3个转录因子（Ngn3 (亦称 Neurog3)，Pdx1 和 Mafa），将它们重组入成年小鼠的胰腺外分泌细胞，相应的细胞可分化成类似于β细胞的细胞。

I didn't care! I encouraged myself that go ahead ,you are the best! I did care my wet map!And finally with the rain beating my map was useless~~i had no choice so i got back to the startplace and reran~~~~ Tired!!!

我不介意我身子湿了，但我介意我的地图湿了~最后地图破了，天还不可怜我，继续下暴雨~~心急死了，我都分不清哪些是眼泪哪些是雨水了~~呜呜无奈我只能重回起点，重新再跑~~累死了

Research of minerals processing experiment suggested a flotation flowsheet,which consists of selective flotation of molybdenum sulfide using kerosene as collector,sodium-silicate as dispersant of slimes,then flotation of molybdenum oxide using modified sodium-silicate as depressant of gangue,Rt as collector.

研究表明，以水玻璃为矿泥分散剂、煤油为捕收剂浮选硫化矿，以改性水玻璃为脉石抑制剂、RT为氧化钼矿捕收剂优先浮选硫化矿再浮氧化矿，可从含Mo 0.34%原矿中，获得品位46.41%的硫化钼精矿，品位27.65%的氧化钼精矿；钼总回收率78.01%。

Comparing with existing solutions, new method can utilize generators' speed signal measured by wide area measurement systems directly and detailed model and parameter of power system components were not needed. After sphering measurement-data, ICA with maximal negentropy criterion was carried out to obtain feature matrix. By this means high-dimension data of multi-machine perturbed trajectories were reduced to lower dimensions, and coherent generator groups were identified by pattern recognition consequently. Simulation results of 36-bus system with 8-generator and planning northwest China 750 kV power grid show that noise signals and bad data can be eliminated. This method is accurate in identifying coherent generator groups.

与现有方法相比，这种方法不需要获得系统元件模型和参数，而是直接球化广域测量系统(wide area measurement systems，WAMS)提供的发电机电角速度信号，再利用最大负熵准则进行独立分量分析得到特征矩阵，将高维数的多机受扰轨迹数据变换到低维空间，通过模式识别得到分群结果。8机36节点系统和西北750 kV电网规划系统算例表明，该方法能有效消除噪音和坏数据的影响，准确识别出同调机群。

There are two steeps to achieve the reliability distribution.

该方法可靠度的分配过程分两步：首先按可靠性再分配原理将系统的可靠度分配到各个最小割集；然后将需要调整可靠度的最小割集看成一个子系统，将最小割集的可靠度按基本事件重要度的大小分配到各个基本事件，即所谓二次分配模型。

D-Pantothenyl alcohol, also called ortho-vitamin 85, is an important nutrition suppled substance. It has been widely applied in the field such as medicine, cosmetic, foodstuff, feed additive, and so on. The preparation of D-pantothenyl alcohol and the optimization of key factor are discussed mainly in this paper. It mainly includes three section.In the first section, with formaldehyde, isobutyl aldehyde and diethyl oxalate as the starting materials, D-pantolactone is prepared via three steps including condensation, catalytic hydrogenation and physical resolution. The specific rotatory power of the product is consistent with imported product.

D-泛醇，俗称原维生素B_5，属维生素B旋类营养增补剂，广泛应用于医药、化妆品、食品、饲料等领域，本文着重探讨了其制备及关键因素的优化，主要内容可分三部分：第一是D-泛内酯的制备，先以甲醛、异丁醛和草酸二乙酯为起始原料合成酮基泛内酯，再经催化氢化得到DL-泛内酯，然后通过物理拆分获得D-泛内酯，得到产物的比旋光度与进口产品基本一致。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。