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This process was affected by many factors such as different conditions of pressure, heating rate, reaction time and addition of catalyst.
停留时间5min的条件下,对稻草在加入不同催化剂条件下的反应进行实验研究。
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This method represents the virtual objects in Euclidean space instead of in affine space, which is consistent with the popular graphics rendering tools such as OpenGL and is more common in practice. A new classification based local and global tracking strategy to match features between the reference image and the currently frame directly is presented, which enables the augmented reality system working effectively even under large changes of viewing angles. A novel affine coordinate system definition method based on a collection of feature points is also proposed, which makes the tracking method effective even when not all the reference points are detected during the whole process, as long as there are at least four pairs of reference points correspondences.
该方法以仿射变换为桥梁来建立欧氏空间下的摄像机坐标系与世界坐标系之间的变换关系,它与OpenGL等当前流行的图形渲染工具一致,具有更强的通用性;采用基于分类的自然特征匹配策略,能够在视角和视点发生大幅度变化情况下依然正常工作;提出基于特征点集合的仿射坐标系定义方法,使增强现实系统在最小配置下只需4点追踪成功即可完成注册,比需要6点的透视投影方法具有更好的健壮性和精确性。
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From research,It is known that the flux of single-phase transformer would offset and exciting current of single-phase transformer would be distorted under DC current inrushing.
直流电流通过两个Y0连接的变压器中性点侵入电力系统,故针对三相三柱变压器直流入侵情况建立了直流入侵下的三相三柱变压器的电路模型和相应的方程,结合三柱磁路的麦克斯韦方程和非线性的B—H曲线方程,利用数字迭代法,在MATLAB环境下编程计算了三相三柱变压器直流入侵下的变压器励磁电流和谐波特征。
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The result indicates that the potential-pH equilibrium diagram, solution's practical pH and metal corrosion's measured potential at corresponding temperature must be used when potential-pH equilibrium diagram is used. And also the potential-pH equilibrium diagram in Fe—H〓O system at different temperature is gathered and classified. According to thermodynamics data, the relation equation of water ionization equilibrium constant K〓 and of ammoniac equilibrium constant K〓 to temperature T is respectively derived.
二、高温电位-pH平衡图的应用与高温溶液实际pH值的计算对高温电位-pH平衡图的应用方法和溶液的高温实际pH值进行了分析和计算,指出在用电位—pH图进行分析时,必须使用相应温度下的电位—pH图、该温度下溶液的实际pH值和金属腐蚀电位测量值,并对各种温度下Fe—H〓O体系的电位-pH图进行了收集归类。
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At first, the wind tunnel test and test data process of this study are introduced in detail. A method to calculate expected extreme values of time series with a long time interval is then proposed with its sub-sections based on the classical Gumbel theory for extreme values and the independence of observed extreme values. At last, the extreme values of the wind pressure coefficients of the present wind tunnel test are calculated with the proposed method and methods used widely at present, such as peak factor method, improved peak factor method and Sadek-Simiu method.
首先 介绍了风洞试验及试验数据处理的基本概况;然后在阐述经典Gumbel极值理论的基础上,根据观察极值的相互独立性推导了短时距下极值分布参数和长时距下极值分布参数的关系式,给出了一种由短时距样本推算长时距下的极值估算方法;最后基于风洞试验数据,将常用极值估算方法(峰值因子法、改进峰值因子法和Sadek-Simiu法)和该方法的计算结果进行了比较。
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Quasi-natural air delivery pattern may be the most favorable dynamic pattern. So a subjective questionnaire research on t...
本文对大连夏季室外凉亭下的环境特征和人的热舒适性做了主观问卷调查研究,通过对428个有效样本的研究与分析,回归得到了人体热舒适投票值TCV与人体平均温度和周围空气温度之间的关系式,在满足该式的条件下,人体平均温度在35.7~36.5℃之间,空气温度在25.5~30.4℃之间变化,且空气相对湿度保持在40%~60%,风速在0~1.5m/s之间波动,人体都可以达到热舒适状态,并发现人们在室外自然环境下往往感觉吹风不足,这点正好与传统空调中人们易产生吹风感的抱怨相反,从而为适当提高送风速度与温度,节约空调能耗奠定了基础。
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Finally, stochastic vibration analysis of a two-floor frame structure by blasting seismic action is done by finite element program ANSYS. In order to contrast, that by nature seismic action is also done here, and displacement field, velocity field and stress field of this two kind of condition are obtained, and differences of the structure damage mechanics by two kind of action are analyzed. Dynamic reliability analysis of the two-floor frame structure is done using of simulation results, obtaining the safe reliability level of the structure by seismic action, and seismic safety evaluation of the frame is completed.
最后,运用有限元程序ANSYS对爆破地震动作用下一个两层框架结构进行了随机振动分析,为了进行对比,这里也对结构受天然地震动作用进行了随机振动分析,得到了两种地震动作用下结构响应的位移场、速度场和应力场的变化情况,分析了爆破地震动和天然地震动对建筑结构物破坏机理的不同;应用数值模拟的结果对该两层框架结构进行了动力可靠性分析,得到了其在地震动作用下的安全可靠度,完成对该框架的爆破地震安全性评估。
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Comparative evaluation of the pricing strategy which induced by the single-objective and double-objective route guidance ,then the pricing result was given under the induction of double-objective route guidance , Numerical result shows that the single-objective route guidance, compared to the double-objective route guidance, will enhance the feasible region of traffic information pricing when traffic information quality is bigger than 0.1, finally, the respective interests of the profits of information users, information providers and the traffic manager who as the decision-making host separately are considered, ultimate price of the traffic information was 1.3 yuan, 2.6 yuan and 1.8 yuan.
用已建的模型对比评价了单目标和双目标两种路径诱导下的交通信息定价策略,并给出双目标路径诱导下的交通信息定价结果,研究结果表明,与双目标路径诱导相比,当交通信息质量大于0.1时,单目标路径诱导增大了交通信息定价的可行区域;最后当具有信息的出行者、交通信息提供者、交通管理者三方各自的利益为决策主体时,双目标路径诱导下交通信息的最终价格分别为1.3元、2.6元和1.8元。
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The root-cause for the synchronous error of multiple axes of the vehicle panoramic sight platform was found after analysis with the geometric method. Since the synchronous error is caused by the windage angle produced in the working process of the optoelectronic platform, the method to correct the angular deviation at any distance is proposed. The experiment for solving the problem was implemented. The experiment indicates that the method is valid.
针对车载周视观瞄平台异轴同步性问题采用几何作图法进行分析,得到异轴同步问题产生的根源是不同光电平台转动过程中由于存在偏差角所致,对校准距离情况下的角偏差,距离小于校准距离情况下的视差和距离大于校准距离情况下的角偏差在3中不同区间的修正方法进行分析并进行等效近似,给出程序实现方法,最后用实验验证了此方法的正确性。
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The results show that the as-synthesized chalcone-containing copolymers are a kind of thermosensitive polymer with a lower critic solution temperature and the LCST of the copolymer decreases with the increase of the chalcone content in the copolymer. With the increase of the solvent polarity, both the maximum absorption wavelength and the fluorescence emitting wavelength of the chalcone-containing copolymers redshifts, and the intensity of fluorescence first increases, then decreases, which exhibits solvent polarity sensitive fluorescence properties.
结果表明,侧链查尔酮共聚物是一类具有低临界溶解温度的温敏性聚合物,其LCST温度随着共聚物中查尔酮含量的增加而降低;随着溶剂极性的增加,侧链查尔酮共聚物的紫外-可见最大吸收波长红移,其荧光发光波长红移并且发光强度先增强后降低,具有溶剂极性敏感的荧光特性;同时对比侧链查尔酮共聚物水溶液低温和高温下的荧光,发现低温下几乎无荧光,高温下其荧光得到明显增强,其荧光具有可逆的温度&开/关&特性。
- 推荐网络例句
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And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.
同时,论述了一体化管理体系构建中的几个主要问题,包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。
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Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.
运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。
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If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.
如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。