提高国土规划可操作性的若干思考

就如何进一步提高国土规划可操作性问题论述国土规划在内容上要进一步突出特点和重点,处理好主要研究内容与其它内容的关系,在深度上要与计划相衔接,做到远期与近期相结合,宏观与微观相结合,需要与可能相结合,通过确立国土规划的法律地位、加强与计划主渠道相衔接和强化国土部门管理职能等多种途径,促进国土规划的实施。     

焦作局进一步加强土地整治项目管理

<正>5月20日,焦作市国土资源局出台规定,实行市级监管指导、县级统筹布局的分级管理办法,建立责任明确、分工协作的管理机制,切实加强项目实施过程中重点环节的监管,进一步明确各级土地整治项目管理职责,规范项目管理运作程序。明确职责,强化项目监督。该局规定市国土资源局是项目立项审查和审批机关,负责项目立项审查、计划下达、实施指导、变更论证、监督检查、绩效考评及竣工验收等工作。该局委托该市土地整理中心负责项目实施过程中的日常监督     

Evaluation of body weight of sea cucumber Apostichopus japonicus by computer vision

Apostichopus japonicus(Holothuroidea,Echinodermata) is an ecological and economic species in East Asia.Conventional biometric monitoring method includes diving for samples and weighing above water,with highly variable in weight measurement due to variation in the quantity of water in the respiratory tree and intestinal content of this species.Recently,video survey method has been applied widely in biometric detection on underwater benthos.However,because of the high flexibility of A.japonicus body,video survey method of monitoring is less used in sea cucumber.In this study,we designed a model to evaluate the wet weight of A.japonicus,using machine vision technology combined with a support vector machine(SVM) that can be used infield surveys on the A.japonicus population.Continuous dorsal images of free-moving A.japonicus individuals in seawater were captured,which also allows for the development of images of the core body edge as well as thorn segmentation.Parameters that include body length,body breadth,perimeter and area,were extracted from the core body edge images and used in SVM regression,to predict the weight of A.japonicus and for comparison with a power model.Results indicate that the use of SVM for predicting the weight of 33 A.japonicus individuals is accurate(R~2=0.99) and compatible with the power model(R~2=0.96).The image-based analysis and size-weight regression models in this study may be useful in body weight evaluation of A.japonicus in lab and field study.     

Effects of spectral composition,photoperiod and light intensity on the gonadal development of Atlantic salmon Salmo salar in recirculating aquaculture systems (RAS)

Artificial lighting regimes have been successfully used to inhibit sexual maturity of Atlantic salmon in confinement.However,when these operations are applied in commercial recirculating aquaculture systems(RAS) using standard lighting technology,sexual maturation is not suppressed.In this study,an L_9(3~3) orthogonal design was used to determine the effects of three factors(spectral composition,photoperiod,and light intensity) on the gonadal development of Atlantic salmon in RAS.We demonstrated that the photoperiod at the tested levels had a much greater effect on the gonadosomatic index and female Fulton condition factor than spectral composition and light intensity.The photoperiod had a significant effect on the secretion of sex steroids and melatonin(P0.05),and a short photoperiod delayed sex steroid and melatonin level increases.The three test factors had no significant effects on the survival rate,specific growth rate,relative weight gain,and male Fulton condition factor(P0.05).The optimum lighting levels in female and male Atlantic salmon were LD 8:16,455 nm(or 625 nm),8.60 W/m~2;and LD 8:16,8.60 W/m~2,455 nm respectively.These conditions not only delayed gonadal development,but also had no negative effects on Atlantic salmon growth in RAS.These results demonstrate that a combination of spectral composition,photoperiod and light intensity is effective at delaying the gonadal development of both male and female salmon in RAS.     

魁蚶(Scapharca broughtonii)半乳糖凝集素(SbGal)基因cDNA的克隆及表达分析

半乳糖凝集素(Galectin)作为动物凝集素家族的一员,是一种重要的免疫因子,在脊椎动物和无脊椎动物中都参与了重要的免疫防御反应。为明确魁蚶(Scapharca broughtonii)半乳糖凝集素基因的结构特征、组织分布及其对病原菌刺激的免疫反应规律,本研究从构建的魁蚶转录组文库中筛选得到半乳糖凝集素基因部分序列,通过c DNA末端快速扩增(rapid amplication of c DNA ends,RACE)技术获得该基因c DNA全长序列(命名为Sb Gal)。序列和结构分析表明,该c DNA全长3120bp,编码554个氨基酸,是一个含有4个糖识别结构域(CRD)的且在双壳贝类中较为独特的半乳糖凝集素;预测蛋白的分子量(Mw)为63.3158 k Da,理论等电点(p I)为4.99。同源性及系统分析表明,Sb Gal基因与美洲牡蛎、合浦珠母贝、海湾扇贝galectin的同源性分别为70%、65%、46%,Sb Gal基因四个CRD彼此的相似性为36%—41%。实时荧光定量PCR(q RT-PCR)结果表明:Sb Gal m RNA在魁蚶血细胞、斧足、闭壳肌、外套膜、鳃和肝胰腺中均有表达,血细胞中的表达量最高,在肝胰腺中的表达量最低;注射鳗弧菌后,相对于对照组,Sb Gal基因在所检测的每个组织中m RNA水平上的表达量都显著上调(P0.01),而且表达量具有显著的时间依赖性和瞬时表达趋势,呈现先升高后降低的趋势。     

温度对刺参繁殖期消化酶和代谢酶活力的影响

为探究刺参(Apostichopus japonicus)繁殖期消化、代谢生理特点,作者以刺参亲参(240 g±15 g)为实验材料,设置了5个温度水平(6、10、14、18、21℃),研究了温度对刺参繁殖期内肠道消化酶和体壁肌肉代谢酶活力的影响。结果发现:温度对亲参繁殖期消化酶、代谢酶活力受培育水温影响显著(P0.05)。其中,胰蛋白酶与淀粉酶活力随水温升高呈先升高后降低的趋势,在10℃时活力最高且达到峰值;脂肪酶活力随着养殖水温升高呈下降趋势,在6℃时活力最高。己糖激酶、丙酮酸激酶、乳酸脱氢酶、苹果酸脱氢酶活力随水温升高出现先增高后降低的趋势,在10℃时达到峰值;而琥珀酸脱氢酶活力随温度升高呈下降趋势。研究表明,10~14℃温度下,亲参消化酶与代谢酶活力均处于较高水平,是理想的亲参室内促熟温度参数。     

2013年春季崂山湾浮游植物群落及其环境控制

2013 年春季(3、4、5 月)对崂山湾海域浮游植物群落及其理化环境进行了3 个航次的调查研究。共鉴定浮游植物40 属75 种, 硅藻是调查区主要的浮游植物类群; 浮游植物细胞丰度平均为1.27×10⁶个/m³,3 月份的平均丰度显著高于4、5 月份(P<0.01); 优势种主要为冰河拟星杆藻(Asterionopsis glacialis)、加拉星平藻(Asteroplanus karianus)、密联角毛藻(Chaetoceros densus)和夜光藻(Noctiluca scintillans), 浮游植物群落演替明显, 由3 月份硅藻控制逐步过渡到4、5 月份硅/甲藻共同控制; 相对较低的硝酸盐水平是导致4、5 月份浮游植物丰度显著低于3 月份的主要原因; 物种–环境数据的冗余分析(RDA)结果显示, 温度、硝酸盐含量是控制崂山湾春季浮游植物分布的重要环境因子。     

基于ADCP的长江河口推移质运动特性研究

基于多普勒声学流速剖面仪(ADCP)在长江口6个测点(长兴岛北侧、南北槽分流口、崇明东滩南侧、横沙岛北侧、南汇南滩和横沙通道北侧)观测的数据,利用ADCP底跟踪功能观测底床推移质运动过程。结果表明:通过ADCP数据,在涨、落急时段可以清晰地看到是否存在推移质运动;直观表达了推移质运动速度在一个潮周期内的变化过程;推移质运动速度变化过程曲线与潮流流速变化过程曲线呈现"对应、不对称"的特征;推移质运动速度的日不等现象比潮流流速日不等现象更加显著。     

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国土资源行政审批制度改革研究探析——以嘉兴市为例

为贯彻落实党的十八届三中全会关于全面深化改革的要求,近年来,嘉兴市国土资源部门把行政审批制度改革作为"转变职能、重心下移、减少层级、服务社会"的重要工作来抓,全力推进审批层级一体化改革,努力实现"审批事项和层级最少,审批集中度和效率最高,审批流程和服务最优"的目标。在放权过程中,始终做到"放而不乱",积极