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In the middle school chemistry teaching should choose the appropriate demonstration experiment, according to the concrete course content and the teaching goal, the appropriate readjustment carries on the demonstration experiment the order, and the attention beforehand completes the full preparatory work, the guarantee demonstration experiment security, demonstrativeness, the visibility and the creativity.

中学化学教学中应选择合适的演示实验,根据具体的教学内容和教学目的,适当调整进行演示实验的顺序,并注意事先做好充分的准备工作,保证演示实验的安全性、示范性、可见度和创造性。

Two kinds of the divergent detonation driving with point initiation are designed in this paper.

进行两种点爆发散爆轰驱动的实验设计,完成两种实验模型下爆轰驱动的数值模拟,并与实验结果作了比较。

The main results that have been accomplished in the paper are listed below: 1. Accumulated lots of experimental data of life-parameter signals with the equipment of detecting the wounded. 2. Provided a method of frequency domain signal integration based on FFT to detect non-contact life-parameter signals. 3. Built up an algorithm of lifeform identification which was based on the time and the frequency domain analysis of life-parameter signals. 4. Developed an application software of life identification for the wounded detecting equipment system S2000?

取得的主要研究结果有:1、用现有的伤员探测实验平台采集了大量生命参数信号,积累了实验数据,为信号处理及信号特征提取研究打下良好的基础;2、提出了基于FFT频域积累的方法进行非接触生命参数信号分析与检测;3、综合时域、频域中生命参数信号特征分析的实验结果,形成生命体识别算法;4、为52000—l型伤员探测装备样第2页第四军医大学硕士学位论文机研制了伤员探测生命体识别软件系统。

Taking the double-U type ground heat exchanger as example, performs in-situ thermal response tests in three different seasons, and the results show that there does exist the seasonal effect.

以双U形地埋管换热器为例,进行了3个不同季节的地下热响应换热实验。实验结果表明,在地埋管换热器地下热响应实验中存在着季节效应。

The flow regime in downcomer can be divided into two kinds: cross flow injection and impingement. Cross flow injection only takes place under low injection flow rate in dowcomer flow. The investigation on flow regime and heat transfer in RPV under PTS is for the first time in China.

在国内本实验是第一个研究下降环腔内的流动与传热,在国际上,象这样同时进行了流动可视化,常温常压下传热和高温高压下传热的实验也不多,特别是针对下降环腔内对流换热系数的研究,在公开文献中还没有相类似的实验。

The preparation process of equisetum pratense total alkaloid includes the following steps: coarse pulverizing equisetum pratense to obtain rough powder, methyl alcohol percolation to obtain percolate, recovering methyl alcohol, concentrating, degreasing by means of petroleum ether, alkalifying concentrate, CHCl3 extracting, soda lye washing, neutral water washing, recovering CHCl3 to obtain rough alkaloid, adsorption by using silica gel column, eluting, recovering solvent so as to obtain refined EPR.

该发明是通过两个步骤来实现的:第一步,提取草问荆总碱,流程:草问荆粗粉――渗漉液――浓缩液(析胶、石油醚脱脂、氨水碱化)――碱化浓缩液(CHCl3萃取)――CHCl3层――CHCl3液(回收CHCl3)――粗生物碱――吸附硅胶柱――精致EPR。第二步,选择实验试剂、仪器、用小鼠作为实验对象,进行中枢神经系统实验,研究作用及作用机制。

the mathematics experiment is: be to gain some kind of mathematics theory , conjecture checking some's mathematicses , to resolve some kind problems, the experimentalist applies certain matter means to, mathematics thinking activities participation, exploration , research flexible being in progress under the environment in specially appointed experiment.

数学实验为:为获得某种数学理论,检验某个数学猜想,解决某类问题,实验者运用一定的物质手段,在数学思维活动的参与下,在特定的实验环境下进行的探索、研究活动。

We have experimentally performed the measurements of phases, the experimental data and the analyses have been given.

我们在实验上进行了对相位测量的研究,给出实验数据以及对实验结果的初步讨论。

They can be classificated to two kinds. One kind is build by photomultiplier; another kind is build by MCP. The mechanism of delayed luminescence is discussed with subradiation. A photon count system is built. To proof the biophoton is a kind of ultra weak photon stream originate from exothermic reaction, and primarily discuss the relationship between the delayed luminescence and proteins activity, we chose microphyllous banyan leave , ficus elastica leave, gingkgo leave, Chinese fan palm leave, and cinnamomum camphora leave as biological samples. The ultra weak photon emission from normal biosamples, and proteins inactivated biosample were measured separately with photon count system. The results showed that the delayed luminescence of biosamples have

在研究过程中,作者从辐射陷获的角度讨论了延迟发光的产生机制,对生物光子的生物化学起源与相干场起源的统一性进行了探索;自行搭建了单光子探测系统;测量了小叶榕树、印度橡树,银杏树,蒲葵树香和樟树等多种植物叶片样品的延迟发光,获得了大量实验数据;为了证明生物光子是一种起源于放热化学反应能量释放的微弱光子流,并初步探讨生物蛋白活性与延迟发光衰减之间的关系,测量了正常生物样品、生物蛋白灭活样品的延迟发光,同时测量了多种不含蛋白质的无机化学体系作为比对,实验结果和实验数据的回归分析表明:弱光子发射来源于放热的化学反应,延迟发光的强度与衰减时间与生物蛋白活性密切相关。

Firestone 1T15M-2 air spring was selected as a research object,the calculation models were amended and verified by test,and the results of test and calculation are close to each other.

以Firestone 1T15M-2型膜式空气弹簧为实验和计算对象,通过实验对计算模型进行了修正和验证,计算结果与实验结果较一致。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。