基于GSM无线传输的温室环境数据采集系统

论述了对温室环境数据进行远程监测的一种方法.温室环境数据采集系统将传感器采集到的环境数据通过GSM模块进行无线传输,实现对温室环境的远程监测.SWP系列多路巡检显示控制仪处理传感器采集的环境数据,并通过RS232串口实时传输给计算机.GSM模块将环境数据通过GSM无线网络传输给远程的数据中心.采用无线数据传输实现通讯具有方便和安全的特点,克服了恶劣环境下架线不便的困难.     

郑州市现代花卉物流港规划设计探究

分析郑州市花卉产业的发展与现状,以郑州航空港区的郑州市现代花卉物流港的规划设计为例,提出了以交通区位优势为依托的郑州市现代花卉物流港规划设计总体思路和以城市规划设计理论为指导的其总体功能布局设计,并解析了郑州市现代花卉物流港的规划要点,最终实现郑州花卉物流的升级,完善郑州市及河南现代花卉产业体系,促进区域经济的可持续发展。     

天津滨海地区园林绿化建设的可持续性研究——以天津港为例

以天津港园林绿化建设为主要研究对象,探讨在滨海重盐碱地区绿化建设过程中存在的问题及制约绿化建设可持续性的主要因素,提出依托技术创新、理念创新,"开源节流"建设节约型园林,推动生态文明建设的建议。     

基于综合生物标志物响应法的渔港重金属污染风险评价

渔港是近海污染物的重要汇集地之一,其中重金属污染尤为突出,但往往缺乏充分的环境监测数据和科学研究。本研究采集了广东和广西4个渔港的表层海水和翡翠贻贝(Perna viridis)样品,测定海水和贻贝软组织中的重金属(Cu、Zn、Pb、Cd、As和Cr)含量,同时分析贻贝肝胰腺组织中超氧化物歧化酶(superoxide dismutase, SOD)、谷胱甘肽过氧化物酶(glutathione peroxidase, GPx)、过氧化氢酶(catalase, CAT)活力以及丙二醛(malondialdehyde, MDA)含量等与抗氧化防御系统有关的生物标志物水平,并利用综合生物标志物响应(integrated biomarker response, IBR)指数法对不同渔港重金属污染水平进行综合评价。结果表明,海水和贻贝软组织中重金属含量均为较低水平,海水重金属综合污染指数(PI)由高至低依次为蛇口渔港>南澫渔港>达濠渔港>渔万渔港,处于自然本底状态。贻贝体内重金属综合污染指数(Pin)由高至低依次为渔万渔港>蛇口渔港>南澫渔港>达濠渔港,处于无污染水平。另外,蛇口渔港海水与贻贝组织中Cu浓度在4个渔港中均表现为最高。IBR指数评价结果表现为蛇口渔港>渔万渔港>达濠渔港>南澫渔港,蛇口渔港的IBR值最高,这与海水重金属综合污染指数结果相一致。相关性分析表明,IBR指数与海水和贻贝体内重金属综合污染指数无显著相关性,但与海水和贻贝组织中Cu的浓度具有显著正相关性。综上,蛇口渔港重金属污染风险相对较高,渔港环境中Cu污染可能需要重点关注,IBR指数综合评价与化学分析相结合在渔港环境污染评价方面具有较好的应用价值。     

Single‐port laparoscopic incisional hernia repair in a horse

A 16‐year‐old Italian Saddle Horse gelding was referred for treatment of an incisional hernia that developed 7 months after a ventral midline laparotomy for treatment of acute abdominal pain. Physical examination revealed a hernia approximately 20 cm long and 15 cm wide on the ventral aspect of the abdomen. Ultrasonography revealed the dimensions of the hernia ring to be approximately 15 cm in length and 10 cm in width. A single‐port laparoscopic incisional hernia repair using an operating 0° laparoscope was performed with an appropriately sized (24 × 18 cm) piece of mesh fixed in place with simple interrupted transabdominal sutures. At 4 weeks post operatively, follow‐up physical examination and ultrasonography confirmed healing of the surgical site with no evidence of hernia recurrence. The same evaluation was done 6 months post operatively, and the horse returned to its previous level of activity 8 months post operatively. In horses, laparoscopic application of mesh should be considered among the treatment options for incisional hernia. In the present case, this technique was performed with a single port using an operative laparoscope, in contrast to the multiportal techniques reported previously. The case presented here demonstrates that single‐port laparoscopic herniorrhaphy is feasible, and allows proper placement of an expanded polytetrafluoroethylene intraperitoneal mesh in horses     

山西口岸在牛油果上截获危险性蚧虫棕榈栉圆盾蚧

棕榈栉圆盾蚧Hemiberlesia lataniae是一种对水果、蔬菜、苗木等经济类作物造成较大危害的有害生物,寄主植物和分布区域都十分广泛,2017年1月,山西口岸从澳门入境旅客携带的牛油果上首次截获该虫,本文介绍了该虫的分类地位、形态特征及与近似种的区别、寄主植物、地理分布、天敌种类、检验检疫必要性、经济重要性、防治措施。     

对加强口岸查验防止植物物种资源流失的思考

针对近年来我国植物物种资源流失严重的情况,分析了物种流失的主要因素和途径,以及因此对经济造成的巨大损失,在目前采取措施和结合口岸实际的基础上,对进一步有效防止植物物种资源流失提出了建议和意见,包括制定相应的法规、完善口岸物种查验机构和机制、规范物种资源合作及其他任何形式交换资源的审批管理、建立物种资源信息库和远程鉴定系统、开展相关查验技术研究等。     

To Use Virtual x Driver to Realize Interruption Serial Communication

How to develop Virtual x Driver(VxD) in windows system bottom layer is given to realize high efficiency interrupt communication of serial port. By analyzing Virtual x Driver, Programable Interrupt Controller, how to virtually a interruption is proposed. With the operational principle of UART chip 8250, the communication of serial port is analyzed. Finally, the communication between WIN32 application and VxD is discussed, and the constitute of the VxD is given. The applied solid example expresses that method of the serial port communication is efficient.     

Optimization of Helix Intake Port Based on Numerical Simulation

With numerical simulation, an analysis is done on the three-dimension air flow in the helix intake port of a diesel engine. The anthors acquire the distribution of characteristic parameters of air in the port, such as velocity, pressure, turbulence kinetic energy, as well as the flow coefficient and rotate moment around the erect axes at the outlet. The results of simulation indicate that the negotiability of the port is very good while the ability of forming eddy can be enhanced, so several improve measures have been put forward. Comparing with simulation results of these measures, it finds out that the method of combining increase the distance between the definition curve of volute cavity and central line of valve protruding support as well as increase the eddy shell angle can obviously enhance the ability of forming eddy, which is an efficient and rational method.     

Surface Reconstruction and Modification of Port-Combustion Chamber Structure for a Gasoline Engine

Geometry of port-combustion chamber has an important effect on the performance of gasoline engines. Methods and approaches in reverse engineering are introduced into surface reconstruction and modification of a port-combustion chamber structure. Free-form surfaces of the port-combustion chamber structure for a gasoline engine with 4-valves and dual-ball type combustion chamber are successfully reconstructed in the reverse way through data processing, surface modeling, surface verifying, surface re-modeling and smooth evaluating etc., based on laser-scanned point cloud data of a sample work piece. It lays a foundation for imitation innovation of gasoline engine by changing the local structural characteristics and dimensions of a prototype model.