气体处理

By using a mixture of aromatic hydrocarbon and water as a binary solvent,reaction of pyrogallol with PhCCl 3 was carried out in the presence of a catalyst(ZnCl 2?AlCl 3 or SOCl 2).2,3,4-Trihydroxybenzophenone was obtained in yields of 80%-87% with the advantages of easy control,stable yield,high product quality and low cost.

以焦性没食子酸为起始原料，在惰性气体保护和催化剂(ZnCl2、AlCl3或SOCl2)的存在下，在芳香烃与水组成的二元混合溶剂中，与三氯甲苯反应，经过芳香烃溶剂的后处理，可以得到2，3，4-三羟基二苯酮，产率最高达87%。

In order to decrease the increasing of the air pollution from the landfill gas, improve the level of waste disposal harmless and make the landfill gas effective in the Beijing Liu Li Tun Refuse Landfill Site, after approval by Beijing Municipal Administration Commission and Government of Haidian District, Beijing Haidian Environmental Sanitation Service Center decide to build the Landfill Gas Control and Development Project of Beijing Haidian Liu Li Tun Refuse Landfill Site. The Project will be conducted through International Competitive Bidding.

为减少填埋场日渐增长的垃圾填埋气体对空间环境的污染，完善填埋场无害化处理垃圾的功能，进而实现资源化，北京市海淀区环境卫生服务中心经北京市市政管理委员会和海淀区政府同意，决定建设北京市海淀区六里屯垃圾卫生填埋场填埋气治理开发项目。

Easier to deal with POCl3 residuum which condense inside quartz tube containers, reduced 90% above toxic gas, safer for staff's operation.

POCl3 残留物冷凝在石英管容器中，便于安全地处理。减少了90%以上的有毒气体，增加了操作人员的安全性。

Five nitrogen concentrations including 0 mg/L,150 mg/L,300 mg/L,450 mg/L and 600 mg/L were sprayed on the root of D.styracifolium in field to study the effects of different N concentration on gas exchange,chlorophyll content,soluble protein content and nitrate reductase activity in leaves of seedlings.

采用田间试验的方式，设0mg/L，150mg/L，300mg/L，450mg/L和600mg/L5个N浓度处理，研究其对广金钱草苗期叶片气体交换、叶绿素含量、可溶性蛋白含量和硝酸还原酶活性的影响。

Crude coke oven gas contains hydrogen sulphide which is produced from sulphur in the coal.

未处理的焦炉气中含有硫化氢气体，它是由煤中的硫产生的。

The discretisation of the velocity space in the kinetic theory of gases allowsus to replace an integro-partial-differential equation,the Boltzmann equation,by a system of hyperbolic semi-linear partial differential equations.

在气体运动论中将速度空间离散化处理，使得我们可以用一个双曲型的半线性偏微分方程组来取代Boltzmann方程这个积分微分方程。

Its specific procedures are :first to treat the sample with hydrofluoric acid to convert the silica into a gas of silicon tetrafluoride to escape, and then at a PH value of 4 to 5 to treat the residual liquid with hydroxylamine hydrochloride to get the ferric ions reduced to ferrous ions.

其具体步骤为：首先用氢氟酸处理试样，使沉淀法白炭黑转化成四氟化硅气体逸出。

Liquid Chemical wharf, petrochemical logistics, gas supply, sewage treatment, thermoelectricity, etc.

化工码头仓储、石化物流、气体供应、污水处理、热电项目等。

In accordance with the technological difficulties encountered in the process of insulation supervision based on the Dissolved Gases Analysis,several kinds of model and method are presented to improve the reliability and precision of fault diagnosis of the power transformer. Main research content includes:By deeply studying the common transformer faults diagnosing methods,such as three-ratio methods and improved electrical committee agreements,several shortcomings such as uncertainness judgment when the fault reasons,phenomenon and principles come out together while can not consistent to each other etc. For this reason,the old methods can not fully meet the need to engineering practical application.Considering fuzzy relationship matrix can fully represents the causality between fault symptoms and fault types,when diagnosing complex equipments with multiple symptoms and fault causes such as power transformer,a synthetic fuzzy diagnosing model is firstly proposed to diagnose transformers insulation faults based on DGA in this paper. Meanwhile,by further study the character of fuzzy factors,aimed at correcting the defects in classifying fuzzy sets of common fuzzy judgment,a method are put forward by unifying fuzzy synthetic diagnosis and fuzzy principle reasoning.

本文针对应用油中溶解气体分析方法进行变压器绝缘监督时所遇到的主要技术难点，提出了提高变压器故障诊断的准确性、可靠性的几种模诊断方法，主要研究内容有：通过对判断变压器故障常用的三比值法和改良电协研法的深入分析，其诊断准确率较高，但对故障原因、故障现象和故障机理间同时存在不确定性和模糊性的变压器等电气设备的故障诊断，难于满足工程应用的需要；在处理变压器等结构复杂设备的多症状、多原因故障诊断时，模糊关系矩阵可以全面反映这种症状与故障类型间的因果关系，进而提出了变压器故障诊断的模糊综合诊断模型；同时作者还深入分析了模糊算子的特性；针对常用的模糊评判结果的模糊集的集化方法的不足性，提出了将模糊综合诊断与模糊规则推理结合起来进行故障诊断的方法，能达到较好的效果。

This is a gas about to undergo further treatment.

这是一种要进一步处理的气体。

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。