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In order to control the steam temperature at the outlet of the primary superheater of a 1000 t/h once-through boiler, the start up condition is analyzed in accordance with the concept of " isenthalpic switchover" and it is suggested that the ratio of fuel feed to steam flow through the primary superheater before the switchover during cold startup be used as the criterion for judgement.

为控制1000吨/时直流锅炉低温过热器出口汽温，本文系根据&等焓切换&原理对锅炉启动工况作了分析，并提出以冷态启动切分前锅炉燃料量与低温过热器工质通流量的比值作为判断依据。

You will start your tour at the oldest and best protected water village named Zhu Jia Jiao, located 16 miles west of Shanghai downtown. The 400 years old water village will charm you with its small canals, gentle rivers, the tranquil Dian Shan Lake and the numerous small shops in which you can practice your bargaining skills. After two hours of sightseeing there, we will stop by a silk mill to experience the South China real silk making process. Transfer back to the hotel.

朱家角是最古老，保护的最好的水乡，它位于上海的西面，距市区16公里。400年历史的水乡用小河流水，潺潺的溪流和安静的淀山湖吸引着游客，这里还有很多的小店，你可以施展你的调价还价的本领。2个小时的游览后，我们会来到丝绸加工厂来亲历中国丝绸的加工过程，后返回酒店。

The results of the study showed that:① Using dozens of kilograms of explosives the signal can be detected at distances up to 200 km;②Active source has a certain degree of repeatability among different shots;③This paper presents the following shooting mode and signal detection method based on the similarity of different shots: In light of the similarity between the signals of big shot and small shot, this paper presents a cross-correlation method using signal from big shot signal with high SNR and small shot signal to detect weak small shot signal, the method can effectively detect the small shot signal and pick up the start time of phase, this method can help us make full use of past seismic exploration data records.

野外实验采用1次大当量激发和16次小当量激发，研究结果表明：①有可能利用数十公斤当量的炸药实现200km距离的探测；②在激发条件相同时，不同当量的激发波形滤波后存在一定的相似性；③依据人工震源可重复性采用以下的激发组合方式和处理方法能够有效提高信噪比：针对大当量激发与小当量激发波形的相似性，利用大当量激发的波形作模板与小当量激发的波形作相关，可判断台站是否接受到小当量激发的信号并检测其震相到时信息。

At pump start before the shell and the water pump tube must be filled with water, the air This is because there is existence, the population vacuum pump can not create and maintain.

水泵在启动以前，泵壳和吸水管内必须先充满水，这是因为有空气存在的情况下，水泵吸人口真空无法形成和保持。

At pump start before the shell and the water pump tube must be filled with water, the air This is because there is existence, the population vacuum pump can not create and maintain.

水泵在启动以前，泵壳和吸水管内必须先充满水，这是因为有空气存在的情况下，泵吸人口真空无法形成和保持。

The time from the start moment of the engine up to a mode of self-generation of the converter, at the rotation of a rotor clockwise, approximately is equal 1.5 minutes.

时间从开始的时刻引擎多达模式的自我一代的转换，在旋转的转子顺时针方向，大约等于1.5分钟。

Such doubts havesitimulated the researchers'curiosity and start to explore the students' terms This research proceeds by observation interview test using learning sheets and etc The purpose is to explore students' terms of scientific concepts sources of terms connections between students' usage nomenclature and chooses of usage The results of the research are as follows: 1 There are five kinds of naming principles for students' terms of scientific concepts: appearance habit function replacing and sound Appearance principle contains three categories: color shape and partial construction; habit principle contains custom and ability; replacing principle contains reality and non-reality 2 Students' terms of scientific concepts come from two ways: self-acquisition and learning through senses The former way is only a bit more common than the latter 3 There are three different relationships between students' usage of terms and nomenclature: one both the same in usage and meaning; the other both different; another different usage but the same meaning Normally terms that students used are various from nomenclature in the aspects of usage and meaning only a few would match and even rare for "Synonyms" to occur 4 Alternative options for students' scientific terms are maintenance adaptation or co-existence with formal scientific terms The most common way of selecting usage of terms is to maintain Sometimes students would adapt themselves once learn of scientist's term However some believe that very odd chances for both could exist at the same time

这样的疑问深深引起研究者的好奇，著手探索学生科学概念所使用的语言。本研究透过观察、访谈、学习单施测等方法来进行，目的在探讨学童在科学概念上所使用之学生惯用语、学生惯用语来源、学生惯用语与科学家用语之关联性、学生惯用语选择。研究结果如下：一、学童在科学概念上所使用之学生惯用语的命名原则有五种：外型、习性、功能、藉代称呼及声音，其中外型原则有颜色、体型及部份构造三类目，习性原则有习惯及能力两类目，藉代称呼原则有实体及虚拟两类目。二、学童在科学概念上所使用之学生惯用语有两种来源，分别为自己称取和听来。学生惯用语来源较多为自己称取，透过其他方式听来少一点，但两种来源的比率差距甚小。三、学童在科学概念上所使用之学生惯用语和科学家用语的关系有三种，分别为用语意涵均相同、用语不同意涵相同和用语意涵均不同。学生惯用语通常和科学家的用语是不同的，且其意涵也不同，只有部份学生惯用语和科学家用语意涵均相同，至於学生惯用语和科学家用语不同但意涵相同的极少。四、学童的科学概念相关学生惯用语选择有三种，分别为维持学生惯用语、改变成科学家用语和科学家与学生惯用语皆可。学童的科学概念相关学生惯用语选择，以维持学生惯用语最多，而有些时候学生会在得知科学家的用语后改变成科学家用语，但认为科学家用语和自己使用的学生惯用语皆可的则很少。

However, in the context of the sport of downhill skiing, I recommend you begin exercising at home, two to three months prior to the start of the ski season.

然而，在这项运动的滑雪，我建议你开始行使在家里， 2至3个月前开始的滑雪季节。

Start from the top left of the stitch, then bring the needle through from the bottom, holding the tail at the back of the thread.

开始从针的左上角，然后把从底部通过针，持有在线程回尾巴。

The Creation itself was achieved in the autumn, according to a tradition of Judaism--whence the Jewish New Year, Rosh Hashanah, at summer's end or the start of fhll.

按照犹太教的传统说法，天地万物的创造就是在秋天完成的。因此，犹太人的新年——拉什·哈夏那节定在夏末秋初。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。